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- Updated portaudio

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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/trunk@247 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Diane Bruce 2006-08-09 19:59:20 +00:00
parent 9471e22ff2
commit d8934b4f71
74 changed files with 73647 additions and 1541 deletions
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179
portaudio-v19/Makefile
View File

@ -1,40 +1,58 @@
# Generated automatically from Makefile.in by configure.
#
# PortAudio V19 Makefile.in
#
# Dominic Mazzoni
# Modifications by Mikael Magnusson
#
top_srcdir = .
srcdir = .
top_builddir = .
PREFIX = /usr/local
CC = cc
CFLAGS = -Ipa_common -g -O2 -Wall -pedantic -pipe -fPIC -DPA_LITTLE_ENDIAN -DSIZEOF_SHORT=2 -DSIZEOF_INT=4 -DSIZEOF_LONG=4 -DHAVE_LIBPTHREAD=1 -DPA_USE_OSS=1
LIBS = -lpthread -lm -lpthread
prefix = $(PREFIX)
exec_prefix = ${prefix}
bindir = ${exec_prefix}/bin
libdir = ${exec_prefix}/lib
includedir = ${prefix}/include
CC = gcc
CFLAGS = -g -O2 -DPA_LITTLE_ENDIAN -pthread -I$(top_srcdir)/include -I$(top_srcdir)/src/common -I$(top_srcdir)/src/os/unix -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DSIZEOF_SHORT=2 -DSIZEOF_INT=4 -DSIZEOF_LONG=4 -DHAVE_CLOCK_GETTIME=1 -DHAVE_NANOSLEEP=1 -DPA_USE_OSS=1
LIBS = -lm -lpthread
AR = /usr/bin/ar
RANLIB = ranlib
LIBTOOL = $(SHELL) $(top_builddir)/libtool
INSTALL = /usr/bin/install -c
INSTALL_DATA = ${INSTALL} -m 644
SHARED_FLAGS = -shared -fPIC
DLL_LIBS =
CXXFLAGS =
LDFLAGS =
DLL_LIBS = -lrt -lm -lpthread
CXXFLAGS = -g -O2
NASM =
NASMOPT =
LN_S = ln -s
LT_RELEASE=@LT_RELEASE@
LT_CURRENT=2
LT_REVISION=0
LT_AGE=0
OTHER_OBJS = pa_unix_oss/pa_unix_oss.o pa_unix/pa_unix_hostapis.o pa_unix/pa_unix_util.o
OTHER_OBJS = src/hostapi/oss/pa_unix_oss.o src/os/unix/pa_unix_hostapis.o src/os/unix/pa_unix_util.o
PALIB = libportaudio.a
PADLL = libportaudio.so
PADLLV = $(PADLL).0.0.19
PAINC = pa_common/portaudio.h
PALIB = libportaudio.la
PAINC = include/portaudio.h
PA_LDFLAGS = $(LDFLAGS) $(SHARED_FLAGS) -rpath $(libdir) -no-undefined -export-symbols-regex "Pa_.*" -version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE)
#MAKEFILE = Makefile
COMMON_OBJS = \
pa_common/pa_allocation.o \
pa_common/pa_converters.o \
pa_common/pa_cpuload.o \
pa_common/pa_dither.o \
pa_common/pa_front.o \
pa_common/pa_process.o \
pa_common/pa_skeleton.o \
pa_common/pa_stream.o \
pa_common/pa_trace.o
src/common/pa_allocation.o \
src/common/pa_converters.o \
src/common/pa_cpuload.o \
src/common/pa_dither.o \
src/common/pa_front.o \
src/common/pa_process.o \
src/common/pa_skeleton.o \
src/common/pa_stream.o \
src/common/pa_trace.o
TESTS = \
bin/paqa_devs \
@ -56,6 +74,7 @@ TESTS = \
bin/patest_pink \
bin/patest_prime \
bin/patest_read_record \
bin/patest_read_write_wire \
bin/patest_record \
bin/patest_ringmix \
bin/patest_saw \
@ -65,7 +84,6 @@ TESTS = \
bin/patest_sine_time \
bin/patest_start_stop \
bin/patest_stop \
bin/patest_sync \
bin/patest_toomanysines \
bin/patest_underflow \
bin/patest_wire \
@ -77,6 +95,8 @@ TESTS = \
# Most of these don't compile yet. Put them in TESTS, above, if
# you want to try to compile them...
ALL_TESTS = \
$(TESTS) \
bin/patest_sync \
bin/debug_convert \
bin/debug_dither_calc \
bin/debug_dual \
@ -88,65 +108,34 @@ ALL_TESTS = \
bin/debug_sine \
bin/debug_sine_formats \
bin/debug_srate \
bin/debug_test1 \
bin/pa_devs \
bin/pa_fuzz \
bin/pa_minlat \
bin/paqa_devs \
bin/paqa_errs \
bin/patest1 \
bin/patest_buffer \
bin/patest_clip \
bin/patest_dither \
bin/patest_hang \
bin/patest_in_overflow \
bin/patest_latency \
bin/patest_leftright \
bin/patest_longsine \
bin/patest_many \
bin/patest_maxsines \
bin/patest_multi_sine \
bin/patest_out_underflow \
bin/patest_pink \
bin/patest_read_record \
bin/patest_record \
bin/patest_ringmix \
bin/patest_saw \
bin/patest_sine8 \
bin/patest_sine \
bin/patest_sine_formats \
bin/patest_sine_time \
bin/patest_start_stop \
bin/patest_stop \
bin/patest_sync \
bin/patest_toomanysines \
bin/patest_underflow \
bin/patest_wire \
bin/patest_write_sine
bin/debug_test1
OBJS = $(COMMON_OBJS) $(OTHER_OBJS)
all: lib/$(PALIB) lib/$(PADLLV) tests
LTOBJS:= $(OBJS:.o=.lo)
tests: bin/ $(TESTS)
SUBDIRS =
#SUBDIRS += bindings/cpp
lib/$(PALIB): lib/ $(OBJS) Makefile $(PAINC)
$(AR) ruv lib/$(PALIB) $(OBJS)
$(RANLIB) lib/$(PALIB)
all: lib/$(PALIB) all-recursive tests
lib/$(PADLLV): lib/ $(OBJS) Makefile $(PAINC)
$(CC) $(SHARED_FLAGS) -o lib/$(PADLLV) $(OBJS) $(DLL_LIBS)
tests: bin-stamp $(TESTS)
$(TESTS): bin/%: lib/$(PALIB) Makefile $(PAINC) pa_tests/%.c
$(CC) -o $@ $(CFLAGS) pa_tests/$*.c lib/$(PALIB) $(LIBS)
install: lib/$(PALIB) lib/$(PADLLV)
$(INSTALL) -d $(PREFIX)/lib
$(INSTALL) -m 644 lib/$(PADLLV) $(PREFIX)/lib/$(PADLLV)
$(INSTALL) -m 644 lib/$(PALIB) $(PREFIX)/lib/$(PALIB)
cd $(PREFIX)/lib && rm -f $(PADLL) && ln -s $(PADLLV) $(PADLL)
$(INSTALL) -d $(PREFIX)/include
$(INSTALL) -m 644 pa_common/portaudio.h $(PREFIX)/include/portaudio.h
lib/$(PALIB): lib-stamp $(LTOBJS) $(MAKEFILE) $(PAINC)
$(LIBTOOL) --mode=link $(CC) $(PA_LDFLAGS) -o lib/$(PALIB) $(LTOBJS) $(DLL_LIBS)
$(ALL_TESTS): bin/%: lib/$(PALIB) $(MAKEFILE) $(PAINC) test/%.c
$(LIBTOOL) --mode=link $(CC) -o $@ $(CFLAGS) $(top_srcdir)/test/$*.c lib/$(PALIB) $(LIBS)
install: lib/$(PALIB) portaudio-2.0.pc
$(INSTALL) -d $(DESTDIR)$(libdir)
$(LIBTOOL) --mode=install $(INSTALL) lib/$(PALIB) $(DESTDIR)$(libdir)
$(INSTALL) -d $(DESTDIR)$(includedir)
$(INSTALL_DATA) -m 644 $(top_srcdir)/$(PAINC) $(DESTDIR)$(includedir)/portaudio.h
$(INSTALL) -d $(DESTDIR)$(libdir)/pkgconfig
$(INSTALL) -m 644 portaudio-2.0.pc $(DESTDIR)$(libdir)/pkgconfig/portaudio-2.0.pc
@echo ""
@echo "------------------------------------------------------------"
@echo "PortAudio was successfully installed."
@ -154,33 +143,55 @@ install: lib/$(PALIB) lib/$(PADLLV)
@echo "On some systems (e.g. Linux) you should run 'ldconfig' now"
@echo "to make the shared object available. You may also need to"
@echo "modify your LD_LIBRARY_PATH environment variable to include"
@echo "the directory $(PREFIX)/lib"
@echo "the directory $(libdir)"
@echo "------------------------------------------------------------"
@echo ""
$(MAKE) install-recursive
uninstall:
rm -f $(PREFIX)/lib/$(PADLLV)
rm -f $(PREFIX)/lib/$(PALIB)
rm -f $(PREFIX)/lib/$(PADLL)
rm -f $(PREFIX)/include/portaudio.h
$(LIBTOOL) --mode=uninstall rm -f $(DESTDIR)$(libdir)/$(PALIB)
$(LIBTOOL) --mode=uninstall rm -f $(DESTDIR)$(includedir)/portaudio.h
$(MAKE) uninstall-recursive
clean:
rm -f $(OBJS) $(TESTS) lib/$(PALIB) lib/$(PADLLV)
$(LIBTOOL) --mode=clean rm -f $(LTOBJS) $(ALL_TESTS) lib/$(PALIB)
rm -f bin-stamp lib-stamp
-rm -rf bin lib
%.o: %.c Makefile $(PAINC)
distclean: clean
rm -f config.log config.status Makefile libtool portaudio-2.0.pc
%.o: %.c $(MAKEFILE) $(PAINC)
$(CC) -c $(CFLAGS) $< -o $@
%.o: %.cpp Makefile $(PAINC)
%.lo: %.c $(MAKEFILE) $(PAINC)
$(LIBTOOL) --mode=compile $(CC) -c $(CFLAGS) $< -o $@
%.o: %.cpp $(MAKEFILE) $(PAINC)
$(CXX) -c $(CXXFLAGS) $< -o $@
%.o: %.asm
$(NASM) $(NASMOPT) -o $@ $<
bin:
mkdir bin
bin-stamp:
-mkdir bin
touch $@
lib:
mkdir lib
lib-stamp:
-mkdir lib
-mkdir -p src/os/win src/os/unix src/os/mac_osx src/common \
src/hostapi/oss src/hostapi/alsa src/hostapi/jack src/hostapi/asihpi \
src/hostapi/wmme src/hostapi/wdmks src/hostapi/dsound src/hostapi/wasapi
touch $@
Makefile: Makefile.in config.status
$(SHELL) config.status
all-recursive:
for dir in $(SUBDIRS); do make -C $$dir all; done
install-recursive:
for dir in $(SUBDIRS); do make -C $$dir install; done
uninstall-recursive:
for dir in $(SUBDIRS); do make -C $$dir uninstall; done

168
portaudio-v19/Makefile.in
View File

@ -2,38 +2,57 @@
# PortAudio V19 Makefile.in
#
# Dominic Mazzoni
# Modifications by Mikael Magnusson
#
top_srcdir = @top_srcdir@
srcdir = @srcdir@
VPATH = @srcdir@
top_builddir = .
PREFIX = @prefix@
prefix = $(PREFIX)
exec_prefix = @exec_prefix@
bindir = @bindir@
libdir = @libdir@
includedir = @includedir@
CC = @CC@
CFLAGS = -Ipa_common @CFLAGS@ @DEFS@
CFLAGS = @CFLAGS@ -I$(top_srcdir)/include -I$(top_srcdir)/src/common -I$(top_srcdir)/src/os/unix @DEFS@
LIBS = @LIBS@
AR = @AR@
RANLIB = @RANLIB@
LIBTOOL = @LIBTOOL@
INSTALL = @INSTALL@
INSTALL_DATA = @INSTALL_DATA@
SHARED_FLAGS = @SHARED_FLAGS@
LDFLAGS = @LDFLAGS@
DLL_LIBS = @DLL_LIBS@
CXXFLAGS = @CXXFLAGS@
NASM = @NASM@
NASMOPT = @NASMOPT@
LN_S = @LN_S@
LT_RELEASE=@LT_RELEASE@
LT_CURRENT=@LT_CURRENT@
LT_REVISION=@LT_REVISION@
LT_AGE=@LT_AGE@
OTHER_OBJS = @OTHER_OBJS@
PALIB = libportaudio.a
PADLL = @PADLL@
PADLLV = $(PADLL).0.0.19
PAINC = pa_common/portaudio.h
PALIB = libportaudio.la
PAINC = include/portaudio.h
PA_LDFLAGS = $(LDFLAGS) $(SHARED_FLAGS) -rpath $(libdir) -no-undefined -export-symbols-regex "Pa_.*" -version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE)
#MAKEFILE = Makefile
COMMON_OBJS = \
pa_common/pa_allocation.o \
pa_common/pa_converters.o \
pa_common/pa_cpuload.o \
pa_common/pa_dither.o \
pa_common/pa_front.o \
pa_common/pa_process.o \
pa_common/pa_skeleton.o \
pa_common/pa_stream.o \
pa_common/pa_trace.o
src/common/pa_allocation.o \
src/common/pa_converters.o \
src/common/pa_cpuload.o \
src/common/pa_dither.o \
src/common/pa_front.o \
src/common/pa_process.o \
src/common/pa_skeleton.o \
src/common/pa_stream.o \
src/common/pa_trace.o
TESTS = \
bin/paqa_devs \
@ -55,6 +74,7 @@ TESTS = \
bin/patest_pink \
bin/patest_prime \
bin/patest_read_record \
bin/patest_read_write_wire \
bin/patest_record \
bin/patest_ringmix \
bin/patest_saw \
@ -64,7 +84,6 @@ TESTS = \
bin/patest_sine_time \
bin/patest_start_stop \
bin/patest_stop \
bin/patest_sync \
bin/patest_toomanysines \
bin/patest_underflow \
bin/patest_wire \
@ -76,6 +95,8 @@ TESTS = \
# Most of these don't compile yet. Put them in TESTS, above, if
# you want to try to compile them...
ALL_TESTS = \
$(TESTS) \
bin/patest_sync \
bin/debug_convert \
bin/debug_dither_calc \
bin/debug_dual \
@ -87,65 +108,34 @@ ALL_TESTS = \
bin/debug_sine \
bin/debug_sine_formats \
bin/debug_srate \
bin/debug_test1 \
bin/pa_devs \
bin/pa_fuzz \
bin/pa_minlat \
bin/paqa_devs \
bin/paqa_errs \
bin/patest1 \
bin/patest_buffer \
bin/patest_clip \
bin/patest_dither \
bin/patest_hang \
bin/patest_in_overflow \
bin/patest_latency \
bin/patest_leftright \
bin/patest_longsine \
bin/patest_many \
bin/patest_maxsines \
bin/patest_multi_sine \
bin/patest_out_underflow \
bin/patest_pink \
bin/patest_read_record \
bin/patest_record \
bin/patest_ringmix \
bin/patest_saw \
bin/patest_sine8 \
bin/patest_sine \
bin/patest_sine_formats \
bin/patest_sine_time \
bin/patest_start_stop \
bin/patest_stop \
bin/patest_sync \
bin/patest_toomanysines \
bin/patest_underflow \
bin/patest_wire \
bin/patest_write_sine
bin/debug_test1
OBJS = $(COMMON_OBJS) $(OTHER_OBJS)
all: lib/$(PALIB) lib/$(PADLLV) tests
LTOBJS:= $(OBJS:.o=.lo)
tests: bin/ $(TESTS)
SUBDIRS =
@ENABLE_CXX_TRUE@SUBDIRS += bindings/cpp
lib/$(PALIB): lib/ $(OBJS) Makefile $(PAINC)
$(AR) ruv lib/$(PALIB) $(OBJS)
$(RANLIB) lib/$(PALIB)
all: lib/$(PALIB) all-recursive tests
lib/$(PADLLV): lib/ $(OBJS) Makefile $(PAINC)
$(CC) $(SHARED_FLAGS) -o lib/$(PADLLV) $(OBJS) $(DLL_LIBS)
tests: bin-stamp $(TESTS)
$(TESTS): bin/%: lib/$(PALIB) Makefile $(PAINC) pa_tests/%.c
$(CC) -o $@ $(CFLAGS) pa_tests/$*.c lib/$(PALIB) $(LIBS)
install: lib/$(PALIB) lib/$(PADLLV)
$(INSTALL) -d $(PREFIX)/lib
$(INSTALL) -m 644 lib/$(PADLLV) $(PREFIX)/lib/$(PADLLV)
$(INSTALL) -m 644 lib/$(PALIB) $(PREFIX)/lib/$(PALIB)
cd $(PREFIX)/lib && rm -f $(PADLL) && ln -s $(PADLLV) $(PADLL)
$(INSTALL) -d $(PREFIX)/include
$(INSTALL) -m 644 pa_common/portaudio.h $(PREFIX)/include/portaudio.h
lib/$(PALIB): lib-stamp $(LTOBJS) $(MAKEFILE) $(PAINC)
$(LIBTOOL) --mode=link $(CC) $(PA_LDFLAGS) -o lib/$(PALIB) $(LTOBJS) $(DLL_LIBS)
$(ALL_TESTS): bin/%: lib/$(PALIB) $(MAKEFILE) $(PAINC) test/%.c
$(LIBTOOL) --mode=link $(CC) -o $@ $(CFLAGS) $(top_srcdir)/test/$*.c lib/$(PALIB) $(LIBS)
install: lib/$(PALIB) portaudio-2.0.pc
$(INSTALL) -d $(DESTDIR)$(libdir)
$(LIBTOOL) --mode=install $(INSTALL) lib/$(PALIB) $(DESTDIR)$(libdir)
$(INSTALL) -d $(DESTDIR)$(includedir)
$(INSTALL_DATA) -m 644 $(top_srcdir)/$(PAINC) $(DESTDIR)$(includedir)/portaudio.h
$(INSTALL) -d $(DESTDIR)$(libdir)/pkgconfig
$(INSTALL) -m 644 portaudio-2.0.pc $(DESTDIR)$(libdir)/pkgconfig/portaudio-2.0.pc
@echo ""
@echo "------------------------------------------------------------"
@echo "PortAudio was successfully installed."
@ -153,33 +143,55 @@ install: lib/$(PALIB) lib/$(PADLLV)
@echo "On some systems (e.g. Linux) you should run 'ldconfig' now"
@echo "to make the shared object available. You may also need to"
@echo "modify your LD_LIBRARY_PATH environment variable to include"
@echo "the directory $(PREFIX)/lib"
@echo "the directory $(libdir)"
@echo "------------------------------------------------------------"
@echo ""
$(MAKE) install-recursive
uninstall:
rm -f $(PREFIX)/lib/$(PADLLV)
rm -f $(PREFIX)/lib/$(PALIB)
rm -f $(PREFIX)/lib/$(PADLL)
rm -f $(PREFIX)/include/portaudio.h
$(LIBTOOL) --mode=uninstall rm -f $(DESTDIR)$(libdir)/$(PALIB)
$(LIBTOOL) --mode=uninstall rm -f $(DESTDIR)$(includedir)/portaudio.h
$(MAKE) uninstall-recursive
clean:
rm -f $(OBJS) $(TESTS) lib/$(PALIB) lib/$(PADLLV)
$(LIBTOOL) --mode=clean rm -f $(LTOBJS) $(ALL_TESTS) lib/$(PALIB)
rm -f bin-stamp lib-stamp
-rm -rf bin lib
%.o: %.c Makefile $(PAINC)
distclean: clean
rm -f config.log config.status Makefile libtool portaudio-2.0.pc
%.o: %.c $(MAKEFILE) $(PAINC)
$(CC) -c $(CFLAGS) $< -o $@
%.o: %.cpp Makefile $(PAINC)
%.lo: %.c $(MAKEFILE) $(PAINC)
$(LIBTOOL) --mode=compile $(CC) -c $(CFLAGS) $< -o $@
%.o: %.cpp $(MAKEFILE) $(PAINC)
$(CXX) -c $(CXXFLAGS) $< -o $@
%.o: %.asm
$(NASM) $(NASMOPT) -o $@ $<
bin:
mkdir bin
bin-stamp:
-mkdir bin
touch $@
lib:
mkdir lib
lib-stamp:
-mkdir lib
-mkdir -p src/os/win src/os/unix src/os/mac_osx src/common \
src/hostapi/oss src/hostapi/alsa src/hostapi/jack src/hostapi/asihpi \
src/hostapi/wmme src/hostapi/wdmks src/hostapi/dsound src/hostapi/wasapi
touch $@
Makefile: Makefile.in config.status
$(SHELL) config.status
all-recursive:
for dir in $(SUBDIRS); do make -C $$dir all; done
install-recursive:
for dir in $(SUBDIRS); do make -C $$dir install; done
uninstall-recursive:
for dir in $(SUBDIRS); do make -C $$dir uninstall; done

2
portaudio-v19/README.txt
View File

@ -46,7 +46,7 @@ Documentation:
For information on compiling programs with PortAudio, please see the
tutorial at:
http://www.portaudio.com/docs/pa_tutorial.html
http://portaudio.com/trac/wiki/TutorialDir/TutorialStart
Important Files and Folders:
pa_common/ = platform independant code

199
portaudio-v19/SConstruct
View File

@ -1,78 +1,147 @@
import sys, os.path
class ConfigurationError(Exception):
def __init__(self, reason):
Exception.__init__(self, "Configuration failed: %s" % reason)
def rsplit(toSplit, sub, max=-1):
""" str.rsplit seems to have been introduced in 2.4 :( """
l = []
i = 0
while i != max:
try: idx = toSplit.rindex(sub)
except ValueError: break
def _PackageOption(pkgName, default="yes"):
return BoolOption("use%s" % pkgName[0].upper() + pkgName[1:], "use %s if available" % (pkgName), default)
toSplit, splitOff = toSplit[:idx], toSplit[idx + len(sub):]
l.insert(0, splitOff)
i += 1
def _BoolOption(opt, explanation, default="yes"):
return BoolOption("enable%s" % opt[0].upper() + opt[1:], explanation, default)
l.insert(0, toSplit)
return l
def _DirectoryOption(path, help, default):
return PathOption(path, help, default)
# Incompatible with the latest stable SCons
# return PathOption(path, help, default, PathOption.PathIsDir)
sconsDir = os.path.join("build", "scons")
SConscript(os.path.join(sconsDir, "SConscript_common"))
Import("Platform", "Posix", "ApiVer")
def _EnumOption(opt, explanation, allowedValues, default):
assert default in allowedValues
return EnumOption("with%s" % opt[0].upper() + opt[1:], explanation, default, allowed_values=allowedValues)
# SConscript_opts exports PortAudio options
optsDict = SConscript(os.path.join(sconsDir, "SConscript_opts"))
optionsCache = os.path.join(sconsDir, "options.cache") # Save options between runs in this cache
options = Options(optionsCache, args=ARGUMENTS)
for k in ("Installation Dirs", "Build Targets", "Host APIs", "Build Parameters", "Bindings"):
options.AddOptions(*optsDict[k])
# Propagate options into environment
env = Environment(options=options)
# Save options for next run
options.Save(optionsCache, env)
# Generate help text for options
env.Help(options.GenerateHelpText(env))
def getPlatform():
global __platform
try: return __platform
except NameError:
env = Environment()
if env["PLATFORM"] == "posix":
if sys.platform[:5] == "linux":
__platform = "linux"
else:
raise ConfigurationError("Unknown platform %s" % sys.platform)
else:
if not env["PLATFORM"] in ("win32", "cygwin") + Posix:
raise ConfigurationError("Unknown platform %s" % env["PLATFORM"])
__platform = env["PLATFORM"]
buildDir = os.path.join("#", sconsDir, env["PLATFORM"])
return __platform
# sunos, aix, hpux, irix, sunos appear to be platforms known by SCons, assuming they're POSIX compliant
Posix = ("linux", "darwin", "sunos", "aix", "hpux", "irix", "sunos")
Windows = ("win32", "cygwin")
env = Environment(CPPPATH="pa_common")
Platform = getPlatform()
opts = Options("options.cache", args=ARGUMENTS)
# Determine parameters to build tools
if Platform in Posix:
opts.AddOptions(
_DirectoryOption("prefix", "installation prefix", "/usr/local"),
_PackageOption("ALSA"),
_PackageOption("OSS"),
_PackageOption("JACK"),
)
elif Platform in Windows:
if Platform == "cygwin":
opts.AddOptions(_DirectoryOption("prefix", "installation prefix", "/usr/local"))
opts.AddOptions(_EnumOption("winAPI", "Windows API to use", ("wmme", "directx", "asio"), "wmme"))
baseLinkFlags = threadCFlags = "-pthread"
baseCxxFlags = baseCFlags = "-Wall -pedantic -pipe " + threadCFlags
debugCxxFlags = debugCFlags = "-g"
optCxxFlags = optCFlags = "-O2"
env["CCFLAGS"] = baseCFlags.split()
env["CXXFLAGS"] = baseCxxFlags.split()
env["LINKFLAGS"] = baseLinkFlags.split()
if env["enableDebug"]:
env.AppendUnique(CCFLAGS=debugCFlags.split())
env.AppendUnique(CXXFLAGS=debugCxxFlags.split())
if env["enableOptimize"]:
env.AppendUnique(CCFLAGS=optCFlags.split())
env.AppendUnique(CXXFLAGS=optCxxFlags.split())
if not env["enableAsserts"]:
env.AppendUnique(CPPDEFINES=["-DNDEBUG"])
if env["customCFlags"]:
env.Append(CCFLAGS=env["customCFlags"])
if env["customCxxFlags"]:
env.Append(CXXFLAGS=env["customCxxFlags"])
if env["customLinkFlags"]:
env.Append(LINKFLAGS=env["customLinkFlags"])
if Platform == "darwin":
opts.AddOptions(_EnumOption("macAPI", "Mac API to use", ("asio", "core", "sm"), "core"))
env.Append(CPPPATH=[os.path.join("#", "include"), "common"])
opts.AddOptions(
_BoolOption("shared", "create shared library"),
_BoolOption("static", "create static library"),
_BoolOption("debug", "compile with debug symbols"),
_BoolOption("optimize", "compile with optimization", default="no"),
_BoolOption("asserts", "runtime assertions are helpful for debugging, but can be detrimental to performance", default="yes"),
_BoolOption("debugOutput", "enable debug output", default="no"),
("customCFlags", "customize compilation of C code", ""),
)
opts.Update(env)
opts.Save("options.cache", env)
Help(opts.GenerateHelpText(env))
# Store all signatures in one file, otherwise .sconsign files will get installed along with our own files
env.SConsignFile(os.path.join(sconsDir, ".sconsign"))
env.SConscriptChdir(False)
SConscript("SConscript", build_dir=".build_scons", exports=["env", "Platform", "Posix", "ConfigurationError"], duplicate=False)
sources, sharedLib, staticLib, tests, portEnv = env.SConscript(os.path.join("src", "SConscript"),
build_dir=buildDir, duplicate=False, exports=["env"])
if Platform in Posix:
prefix = env["prefix"]
includeDir = os.path.join(prefix, "include")
libDir = os.path.join(prefix, "lib")
env.Alias("install", includeDir)
env.Alias("install", libDir)
# pkg-config
def installPkgconfig(env, target, source):
tgt = str(target[0])
src = str(source[0])
f = open(src)
try: txt = f.read()
finally: f.close()
txt = txt.replace("@prefix@", prefix)
txt = txt.replace("@exec_prefix@", prefix)
txt = txt.replace("@libdir@", libDir)
txt = txt.replace("@includedir@", includeDir)
txt = txt.replace("@LIBS@", " ".join(["-l%s" % l for l in portEnv["LIBS"]]))
txt = txt.replace("@THREAD_CFLAGS@", threadCFlags)
f = open(tgt, "w")
try: f.write(txt)
finally: f.close()
pkgconfigTgt = "portaudio-%d.0.pc" % int(ApiVer.split(".", 1)[0])
env.Command(os.path.join(libDir, "pkgconfig", pkgconfigTgt),
os.path.join("#", pkgconfigTgt + ".in"), installPkgconfig)
# Default to None, since if the user disables all targets and no Default is set, all targets
# are built by default
env.Default(None)
if env["enableTests"]:
env.Default(tests)
if env["enableShared"]:
env.Default(sharedLib)
if Platform in Posix:
def symlink(env, target, source):
trgt = str(target[0])
src = str(source[0])
if os.path.islink(trgt) or os.path.exists(trgt):
os.remove(trgt)
os.symlink(os.path.basename(src), trgt)
major, minor, micro = [int(c) for c in ApiVer.split(".")]
soFile = "%s.%s" % (os.path.basename(str(sharedLib[0])), ApiVer)
env.InstallAs(target=os.path.join(libDir, soFile), source=sharedLib)
# Install symlinks
symTrgt = os.path.join(libDir, soFile)
env.Command(os.path.join(libDir, "libportaudio.so.%d.%d" % (major, minor)),
symTrgt, symlink)
symTrgt = rsplit(symTrgt, ".", 1)[0]
env.Command(os.path.join(libDir, "libportaudio.so.%d" % major), symTrgt, symlink)
symTrgt = rsplit(symTrgt, ".", 1)[0]
env.Command(os.path.join(libDir, "libportaudio.so"), symTrgt, symlink)
if env["enableStatic"]:
env.Default(staticLib)
env.Install(libDir, staticLib)
env.Install(includeDir, os.path.join("include", "portaudio.h"))
if env["enableCxx"]:
env.SConscriptChdir(True)
cxxEnv = env.Copy()
sharedLibs, staticLibs, headers = env.SConscript(os.path.join("bindings", "cpp", "SConscript"),
exports={"env": cxxEnv, "buildDir": buildDir}, build_dir=os.path.join(buildDir, "portaudiocpp"), duplicate=False)
if env["enableStatic"]:
env.Default(staticLibs)
env.Install(libDir, staticLibs)
if env["enableShared"]:
env.Default(sharedLibs)
env.Install(libDir, sharedLibs)
env.Install(os.path.join(includeDir, "portaudiocpp"), headers)

6658
portaudio-v19/aclocal.m4 vendored
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File diff suppressed because it is too large Load Diff

114
portaudio-v19/config.doxy
View File

@ -1,60 +1,93 @@
# Doxyfile 1.2.13-20020210
# Doxyfile 1.4.6
#---------------------------------------------------------------------------
# General configuration options
# Project related configuration options
#---------------------------------------------------------------------------
PROJECT_NAME = PortAudio
PROJECT_NUMBER = 2.0
OUTPUT_DIRECTORY = "./docs/"
OUTPUT_DIRECTORY = ./doc/
CREATE_SUBDIRS = NO
OUTPUT_LANGUAGE = English
EXTRACT_ALL = YES
EXTRACT_PRIVATE = NO
EXTRACT_STATIC = NO
EXTRACT_LOCAL_CLASSES = YES
HIDE_UNDOC_MEMBERS = NO
HIDE_UNDOC_CLASSES = NO
USE_WINDOWS_ENCODING = NO
BRIEF_MEMBER_DESC = YES
REPEAT_BRIEF = YES
ABBREVIATE_BRIEF = "The $name class" \
"The $name widget" \
"The $name file" \
is \
provides \
specifies \
contains \
represents \
a \
an \
the
ALWAYS_DETAILED_SEC = NO
INLINE_INHERITED_MEMB = NO
FULL_PATH_NAMES = NO
STRIP_FROM_PATH =
INTERNAL_DOCS = NO
STRIP_CODE_COMMENTS = YES
CASE_SENSE_NAMES = YES
STRIP_FROM_INC_PATH =
SHORT_NAMES = NO
HIDE_SCOPE_NAMES = NO
VERBATIM_HEADERS = YES
SHOW_INCLUDE_FILES = YES
JAVADOC_AUTOBRIEF = NO
MULTILINE_CPP_IS_BRIEF = NO
DETAILS_AT_TOP = NO
INHERIT_DOCS = YES
SEPARATE_MEMBER_PAGES = NO
TAB_SIZE = 8
ALIASES =
OPTIMIZE_OUTPUT_FOR_C = YES
OPTIMIZE_OUTPUT_JAVA = NO
BUILTIN_STL_SUPPORT = NO
DISTRIBUTE_GROUP_DOC = NO
SUBGROUPING = YES
#---------------------------------------------------------------------------
# Build related configuration options
#---------------------------------------------------------------------------
EXTRACT_ALL = YES
EXTRACT_PRIVATE = NO
EXTRACT_STATIC = NO
EXTRACT_LOCAL_CLASSES = YES
EXTRACT_LOCAL_METHODS = NO
HIDE_UNDOC_MEMBERS = NO
HIDE_UNDOC_CLASSES = NO
HIDE_FRIEND_COMPOUNDS = NO
HIDE_IN_BODY_DOCS = NO
INTERNAL_DOCS = NO
CASE_SENSE_NAMES = YES
HIDE_SCOPE_NAMES = NO
SHOW_INCLUDE_FILES = YES
INLINE_INFO = YES
SORT_MEMBER_DOCS = YES
DISTRIBUTE_GROUP_DOC = NO
TAB_SIZE = 8
SORT_BRIEF_DOCS = NO
SORT_BY_SCOPE_NAME = NO
GENERATE_TODOLIST = YES
GENERATE_TESTLIST = YES
GENERATE_BUGLIST = YES
ALIASES =
GENERATE_DEPRECATEDLIST= YES
ENABLED_SECTIONS =
MAX_INITIALIZER_LINES = 30
OPTIMIZE_OUTPUT_FOR_C = YES
OPTIMIZE_OUTPUT_JAVA = NO
SHOW_USED_FILES = YES
SHOW_DIRECTORIES = NO
FILE_VERSION_FILTER =
#---------------------------------------------------------------------------
# configuration options related to warning and progress messages
#---------------------------------------------------------------------------
QUIET = NO
WARNINGS = YES
WARN_IF_UNDOCUMENTED = YES
WARN_IF_DOC_ERROR = YES
WARN_NO_PARAMDOC = NO
WARN_FORMAT = "$file:$line: $text"
WARN_LOGFILE =
#---------------------------------------------------------------------------
# configuration options related to the input files
#---------------------------------------------------------------------------
INPUT = ./pa_common ./pa_win_wmme ./pa_asio ./pa_win_ds ./pa_linux_alsa ./pa_unix_oss ./pa_jack ./pa_tests
FILE_PATTERNS = *.h *.c *.cpp
INPUT = src \
include \
test
FILE_PATTERNS = *.h \
*.c \
*.cpp
RECURSIVE = YES
EXCLUDE =
EXCLUDE_SYMLINKS = NO
@ -64,14 +97,18 @@ EXAMPLE_PATTERNS =
EXAMPLE_RECURSIVE = NO
IMAGE_PATH =
INPUT_FILTER =
FILTER_PATTERNS =
FILTER_SOURCE_FILES = NO
#---------------------------------------------------------------------------
# configuration options related to source browsing
#---------------------------------------------------------------------------
SOURCE_BROWSER = NO
INLINE_SOURCES = NO
STRIP_CODE_COMMENTS = YES
REFERENCED_BY_RELATION = YES
REFERENCES_RELATION = YES
USE_HTAGS = NO
VERBATIM_HEADERS = YES
#---------------------------------------------------------------------------
# configuration options related to the alphabetical class index
#---------------------------------------------------------------------------
@ -82,13 +119,15 @@ IGNORE_PREFIX =
# configuration options related to the HTML output
#---------------------------------------------------------------------------
GENERATE_HTML = YES
HTML_OUTPUT = doxygen_html
HTML_OUTPUT = html
HTML_FILE_EXTENSION = .html
HTML_HEADER =
HTML_FOOTER =
HTML_STYLESHEET =
HTML_ALIGN_MEMBERS = YES
GENERATE_HTMLHELP = NO
CHM_FILE =
HHC_LOCATION =
GENERATE_CHI = NO
BINARY_TOC = NO
TOC_EXPAND = NO
@ -110,6 +149,7 @@ LATEX_HEADER =
PDF_HYPERLINKS = NO
USE_PDFLATEX = NO
LATEX_BATCHMODE = NO
LATEX_HIDE_INDICES = NO
#---------------------------------------------------------------------------
# configuration options related to the RTF output
#---------------------------------------------------------------------------
@ -130,11 +170,22 @@ MAN_LINKS = NO
# configuration options related to the XML output
#---------------------------------------------------------------------------
GENERATE_XML = NO
XML_OUTPUT = xml
XML_SCHEMA =
XML_DTD =
XML_PROGRAMLISTING = YES
#---------------------------------------------------------------------------
# configuration options for the AutoGen Definitions output
#---------------------------------------------------------------------------
GENERATE_AUTOGEN_DEF = NO
#---------------------------------------------------------------------------
# configuration options related to the Perl module output
#---------------------------------------------------------------------------
GENERATE_PERLMOD = NO
PERLMOD_LATEX = NO
PERLMOD_PRETTY = YES
PERLMOD_MAKEVAR_PREFIX =
#---------------------------------------------------------------------------
# Configuration options related to the preprocessor
#---------------------------------------------------------------------------
ENABLE_PREPROCESSING = YES
@ -147,7 +198,7 @@ PREDEFINED =
EXPAND_AS_DEFINED =
SKIP_FUNCTION_MACROS = YES
#---------------------------------------------------------------------------
# Configuration::addtions related to external references
# Configuration::additions related to external references
#---------------------------------------------------------------------------
TAGFILES =
GENERATE_TAGFILE =
@ -162,24 +213,25 @@ HIDE_UNDOC_RELATIONS = NO
HAVE_DOT = NO
CLASS_GRAPH = YES
COLLABORATION_GRAPH = YES
GROUP_GRAPHS = YES
UML_LOOK = NO
TEMPLATE_RELATIONS = YES
INCLUDE_GRAPH = YES
INCLUDED_BY_GRAPH = YES
CALL_GRAPH = NO
GRAPHICAL_HIERARCHY = YES
DIRECTORY_GRAPH = YES
DOT_IMAGE_FORMAT = png
DOT_PATH =
DOTFILE_DIRS =
MAX_DOT_GRAPH_WIDTH = 1024
MAX_DOT_GRAPH_HEIGHT = 1024
MAX_DOT_GRAPH_DEPTH = 1000
DOT_TRANSPARENT = NO
DOT_MULTI_TARGETS = NO
GENERATE_LEGEND = YES
DOT_CLEANUP = YES
#---------------------------------------------------------------------------
# Configuration::addtions related to the search engine
# Configuration::additions related to the search engine
#---------------------------------------------------------------------------
SEARCHENGINE = NO
CGI_NAME = search.cgi
CGI_URL =
DOC_URL =
DOC_ABSPATH =
BIN_ABSPATH = /usr/local/bin/
EXT_DOC_PATHS =

31
portaudio-v19/config.guess vendored
View File

@ -3,7 +3,7 @@
# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
# 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
timestamp='2003-07-02'
timestamp='2003-02-22'
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
@ -106,7 +106,6 @@ trap "rm -f \$tmpfiles 2>/dev/null; rmdir \$tmp 2>/dev/null; exit 1" 1 2 13 15 ;
: ${TMPDIR=/tmp} ;
{ tmp=`(umask 077 && mktemp -d -q "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" ; } ||
{ test -n "$RANDOM" && tmp=$TMPDIR/cg$$-$RANDOM && (umask 077 && mkdir $tmp) ; } ||
{ tmp=$TMPDIR/cg-$$ && (umask 077 && mkdir $tmp) && echo "Warning: creating insecure temp directory" >&2 ; } ||
{ echo "$me: cannot create a temporary directory in $TMPDIR" >&2 ; exit 1 ; } ;
dummy=$tmp/dummy ;
tmpfiles="$dummy.c $dummy.o $dummy.rel $dummy" ;
@ -283,9 +282,6 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
# 1.2 uses "1.2" for uname -r.
echo ${UNAME_MACHINE}-dec-osf`echo ${UNAME_RELEASE} | sed -e 's/^[VTX]//' | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
exit 0 ;;
Alpha*:OpenVMS:*:*)
echo alpha-hp-vms
exit 0 ;;
Alpha\ *:Windows_NT*:*)
# How do we know it's Interix rather than the generic POSIX subsystem?
# Should we change UNAME_MACHINE based on the output of uname instead
@ -324,9 +320,6 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
NILE*:*:*:dcosx)
echo pyramid-pyramid-svr4
exit 0 ;;
DRS?6000:unix:4.0:6*)
echo sparc-icl-nx6
exit 0 ;;
DRS?6000:UNIX_SV:4.2*:7*)
case `/usr/bin/uname -p` in
sparc) echo sparc-icl-nx7 && exit 0 ;;
@ -751,7 +744,7 @@ EOF
*:BSD/OS:*:*)
echo ${UNAME_MACHINE}-unknown-bsdi${UNAME_RELEASE}
exit 0 ;;
*:FreeBSD:*:*|*:GNU/FreeBSD:*:*)
*:FreeBSD:*:*)
# Determine whether the default compiler uses glibc.
eval $set_cc_for_build
sed 's/^ //' << EOF >$dummy.c
@ -763,10 +756,7 @@ EOF
#endif
EOF
eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep ^LIBC=`
# GNU/FreeBSD systems have a "k" prefix to indicate we are using
# FreeBSD's kernel, but not the complete OS.
case ${LIBC} in gnu) kernel_only='k' ;; esac
echo ${UNAME_MACHINE}-unknown-${kernel_only}freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`${LIBC:+-$LIBC}
echo ${UNAME_MACHINE}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`${LIBC:+-$LIBC}
exit 0 ;;
i*:CYGWIN*:*)
echo ${UNAME_MACHINE}-pc-cygwin
@ -777,8 +767,8 @@ EOF
i*:PW*:*)
echo ${UNAME_MACHINE}-pc-pw32
exit 0 ;;
x86:Interix*:[34]*)
echo i586-pc-interix${UNAME_RELEASE}|sed -e 's/\..*//'
x86:Interix*:3*)
echo i586-pc-interix3
exit 0 ;;
[345]86:Windows_95:* | [345]86:Windows_98:* | [345]86:Windows_NT:*)
echo i${UNAME_MACHINE}-pc-mks
@ -807,9 +797,6 @@ EOF
arm*:Linux:*:*)
echo ${UNAME_MACHINE}-unknown-linux-gnu
exit 0 ;;
cris:Linux:*:*)
echo cris-axis-linux-gnu
exit 0 ;;
ia64:Linux:*:*)
echo ${UNAME_MACHINE}-unknown-linux-gnu
exit 0 ;;
@ -888,9 +875,6 @@ EOF
s390:Linux:*:* | s390x:Linux:*:*)
echo ${UNAME_MACHINE}-ibm-linux
exit 0 ;;
sh64*:Linux:*:*)
echo ${UNAME_MACHINE}-unknown-linux-gnu
exit 0 ;;
sh*:Linux:*:*)
echo ${UNAME_MACHINE}-unknown-linux-gnu
exit 0 ;;
@ -1049,7 +1033,7 @@ EOF
exit 0 ;;
M68*:*:R3V[567]*:*)
test -r /sysV68 && echo 'm68k-motorola-sysv' && exit 0 ;;
3[34]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0 | SHG2:*:4.0:3.0)
3[34]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0)
OS_REL=''
test -r /etc/.relid \
&& OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
@ -1205,9 +1189,6 @@ EOF
*:ITS:*:*)
echo pdp10-unknown-its
exit 0 ;;
SEI:*:*:SEIUX)
echo mips-sei-seiux${UNAME_RELEASE}
exit 0 ;;
esac
#echo '(No uname command or uname output not recognized.)' 1>&2

41
portaudio-v19/config.sub vendored
View File

@ -3,7 +3,7 @@
# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
# 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
timestamp='2003-07-04'
timestamp='2003-02-22'
# This file is (in principle) common to ALL GNU software.
# The presence of a machine in this file suggests that SOME GNU software
@ -118,7 +118,7 @@ esac
# Here we must recognize all the valid KERNEL-OS combinations.
maybe_os=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'`
case $maybe_os in
nto-qnx* | linux-gnu* | kfreebsd*-gnu* | netbsd*-gnu* | storm-chaos* | os2-emx* | rtmk-nova*)
nto-qnx* | linux-gnu* | freebsd*-gnu* | netbsd*-gnu* | storm-chaos* | os2-emx* | rtmk-nova*)
os=-$maybe_os
basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`
;;
@ -229,7 +229,7 @@ case $basic_machine in
| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \
| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \
| arc | arm | arm[bl]e | arme[lb] | armv[2345] | armv[345][lb] | avr \
| c4x | clipper \
| clipper \
| d10v | d30v | dlx | dsp16xx \
| fr30 | frv \
| h8300 | h8500 | hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \
@ -261,7 +261,7 @@ case $basic_machine in
| sh64 | sh64le \
| sparc | sparc64 | sparc86x | sparclet | sparclite | sparcv9 | sparcv9b \
| strongarm \
| tahoe | thumb | tic4x | tic80 | tron \
| tahoe | thumb | tic80 | tron \
| v850 | v850e \
| we32k \
| x86 | xscale | xstormy16 | xtensa \
@ -292,7 +292,7 @@ case $basic_machine in
| a29k-* \
| alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \
| alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \
| alphapca5[67]-* | alpha64pca5[67]-* | amd64-* | arc-* \
| alphapca5[67]-* | alpha64pca5[67]-* | arc-* \
| arm-* | armbe-* | armle-* | armeb-* | armv*-* \
| avr-* \
| bs2000-* \
@ -373,9 +373,6 @@ case $basic_machine in
basic_machine=a29k-none
os=-bsd
;;
amd64)
basic_machine=x86_64-pc
;;
amdahl)
basic_machine=580-amdahl
os=-sysv
@ -771,24 +768,18 @@ case $basic_machine in
pentiumpro | p6 | 6x86 | athlon | athlon_*)
basic_machine=i686-pc
;;
pentiumii | pentium2 | pentiumiii | pentium3)
pentiumii | pentium2)
basic_machine=i686-pc
;;
pentium4)
basic_machine=i786-pc
;;
pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
basic_machine=i586-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
pentiumpro-* | p6-* | 6x86-* | athlon-*)
basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
pentiumii-* | pentium2-*)
basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
pentium4-*)
basic_machine=i786-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
pn)
basic_machine=pn-gould
;;
@ -847,10 +838,6 @@ case $basic_machine in
sb1el)
basic_machine=mipsisa64sb1el-unknown
;;
sei)
basic_machine=mips-sei
os=-seiux
;;
sequent)
basic_machine=i386-sequent
;;
@ -858,9 +845,6 @@ case $basic_machine in
basic_machine=sh-hitachi
os=-hms
;;
sh64)
basic_machine=sh64-unknown
;;
sparclite-wrs | simso-wrs)
basic_machine=sparclite-wrs
os=-vxworks
@ -935,6 +919,10 @@ case $basic_machine in
basic_machine=t90-cray
os=-unicos
;;
tic4x | c4x*)
basic_machine=tic4x-unknown
os=-coff
;;
tic54x | c54x*)
basic_machine=tic54x-unknown
os=-coff
@ -1128,7 +1116,7 @@ case $os in
| -aos* \
| -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
| -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
| -hiux* | -386bsd* | -netbsd* | -openbsd* | -kfreebsd* | -freebsd* | -riscix* \
| -hiux* | -386bsd* | -netbsd* | -openbsd* | -freebsd* | -riscix* \
| -lynxos* | -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \
| -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
| -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
@ -1140,7 +1128,7 @@ case $os in
| -storm-chaos* | -tops10* | -tenex* | -tops20* | -its* \
| -os2* | -vos* | -palmos* | -uclinux* | -nucleus* \
| -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
| -powermax* | -dnix* | -nx6 | -nx7 | -sei*)
| -powermax* | -dnix*)
# Remember, each alternative MUST END IN *, to match a version number.
;;
-qnx*)
@ -1286,9 +1274,6 @@ case $basic_machine in
arm*-semi)
os=-aout
;;
c4x-* | tic4x-*)
os=-coff
;;
# This must come before the *-dec entry.
pdp10-*)
os=-tops20

22329
portaudio-v19/configure vendored
View File

File diff suppressed because it is too large Load Diff

134
portaudio-v19/configure.in
View File

@ -9,7 +9,7 @@ AC_PREREQ(2.13)
dnl Init autoconf and make sure configure is being called
dnl from the right directory
AC_INIT([pa_common/portaudio.h])
AC_INIT([include/portaudio.h])
dnl Specify options
@ -25,6 +25,10 @@ AC_ARG_WITH(oss,
[ --with-oss (default=yes)],
with_oss=$withval, with_oss="yes")
AC_ARG_WITH(asihpi,
[ --with-asihpi (default=auto)],
with_asihpi=$withval, with_asihpi="yes")
AC_ARG_WITH(host_os,
[ --with-host_os (no default)],
host_os=$withval)
@ -46,12 +50,24 @@ AC_ARG_WITH(dxdir,
[ --with-dxdir (default=/usr/local/dx7sdk)],
with_dxdir=$withval, with_dxdir="/usr/local/dx7sdk")
AC_ARG_ENABLE(debug-output,
[ --enable-debug-output],
[if test x$enableval != xno ; then
AC_DEFINE(PA_ENABLE_DEBUG_OUTPUT,,[Enable debugging messages])
fi
])
AC_ARG_ENABLE(cxx,
[ --enable-cxx (default=no)],
enable_cxx=$enableval, enable_cxx="no")
dnl Checks for programs.
AC_PROG_CC
AC_PROG_RANLIB
AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PATH_PROG(AR, ar, no)
if [[ $AR = "no" ]] ; then
AC_MSG_ERROR("Could not find ar - needed to create a library");
@ -64,12 +80,13 @@ dnl checks for various host APIs and arguments to configure that
dnl turn them on or off
AC_CHECK_LIB(asound, snd_pcm_open, have_alsa=yes, have_alsa=no)
AC_CHECK_LIB(hpi, HPI_SubSysCreate, have_asihpi=yes, have_asihpi=no, -lm)
dnl Determine the host description for the subsequent test.
dnl PKG_CHECK_MODULES seems to check and set the host variable also, but
dnl that then requires pkg-config availability which is not standard on
dnl MinGW systems and can be a pain to install.
AC_CANONICAL_HOST
dnl AC_CANONICAL_HOST
PKG_CHECK_MODULES(JACK, jack, have_jack=yes, have_jack=no)
@ -79,16 +96,34 @@ AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
save_LIBS="${LIBS}"
AC_CHECK_LIB(rt, clock_gettime, [rt_libs=" -lrt"])
LIBS="${LIBS}${rt_libs}"
DLL_LIBS="${DLL_LIBS}${rt_libs}"
AC_CHECK_FUNCS([clock_gettime nanosleep])
LIBS="${save_LIBS}"
dnl LT_RELEASE=19
LT_CURRENT=2
LT_REVISION=0
LT_AGE=0
dnl AC_SUBST(LT_RELEASE)
AC_SUBST(LT_CURRENT)
AC_SUBST(LT_REVISION)
AC_SUBST(LT_AGE)
dnl extra variables
AC_SUBST(OTHER_OBJS)
AC_SUBST(PADLL)
AC_SUBST(SHARED_FLAGS)
AC_SUBST(THREAD_CFLAGS)
AC_SUBST(DLL_LIBS)
AC_SUBST(CXXFLAGS)
AC_SUBST(NASM)
AC_SUBST(NASMOPT)
CFLAGS="-g -O2 -Wall -pedantic -pipe -fPIC"
CFLAGS=${CFLAGS:-"-g -O2 -Wall -pedantic -pipe -fPIC"}
if [[ $ac_cv_c_bigendian = "yes" ]] ; then
CFLAGS="$CFLAGS -DPA_BIG_ENDIAN"
@ -101,10 +136,10 @@ case "${host_os}" in
dnl Mac OS X configuration
AC_DEFINE(PA_USE_COREAUDIO)
OTHER_OBJS="pa_mac/pa_mac_hostapis.o pa_unix/pa_unix_util.o pa_mac_core/pa_mac_core.o";
OTHER_OBJS="src/os/mac_osx/pa_mac_hostapis.o src/os/unix/pa_unix_util.o src/hostapi/coreaudio/pa_mac_core.o";
LIBS="-framework CoreAudio -framework AudioToolbox -framework AudioUnit -framework Carbon";
PADLL="libportaudio.dylib";
SHARED_FLAGS="-framework CoreAudio -framework AudioToolbox -framework -framework AudioUnit -framework Carbon -dynamiclib";
SHARED_FLAGS="-framework CoreAudio -framework AudioToolbox -framework AudioUnit -framework Carbon -dynamiclib";
if [[ $with_macapi = "asio" ]] ; then
if [[ $with_asiodir ]] ; then
ASIODIR="$with_asiodir";
@ -114,7 +149,7 @@ case "${host_os}" in
echo "ASIODIR: $ASIODIR";
OTHER_OBJS="$CFLAGS pa_asio/iasiothiscallresolver.o $ASIODIR/host/asiodrivers.o $ASIODIR/common/asio.o $ASIODIR/host/mac/asioshlib.o";
CFLAGS="$CFLAGS -Ipa_asio -I$ASIDIR/host/mac -I$ASIODIR/common";
CFLAGS="$CFLAGS -I\$(top_srcdir)/pa_asio -I$ASIDIR/host/mac -I$ASIODIR/common";
CXXFLAGS="$CFLAGS";
fi
;;
@ -130,14 +165,15 @@ case "${host_os}" in
DXDIR="/usr/local/dx7sdk";
fi
echo "DXDIR: $DXDIR"
OTHER_OBJS="pa_win_ds/pa_win_ds.o pa_win_ds/dsound_wrapper.o pa_win/pa_win_hostapis.o pa_win/pa_win_util.o";
OTHER_OBJS="src/hostapi/dsound/pa_win_ds.o src/hostapi/dsound/dsound_wrapper.o src/os/win/pa_win_hostapis.o src/os/win/pa_win_util.o";
LIBS="-lwinmm -lm -ldsound -lole32";
PADLL="portaudio.dll";
SHARED_FLAGS="-shared -mthreads";
DLL_LIBS="-lwinmm -lm -L./dx7sdk/lib -ldsound -lole32";
THREAD_CFLAGS="-mthreads"
SHARED_FLAGS="-shared";
DLL_LIBS="${DLL_LIBS} -lwinmm -lm -L./dx7sdk/lib -ldsound -lole32";
#VC98="\"/c/Program Files/Microsoft Visual Studio/VC98/Include\"";
#CFLAGS="$CFLAGS -I$VC98 -DPA_NO_WMME -DPA_NO_ASIO";
CFLAGS="$CFLAGS -Ipa_common -I$DXDIR/include -DPA_NO_WMME -DPA_NO_ASIO" -DPA_NO_WDMKS;
CFLAGS="$CFLAGS -I\$(top_srcdir)/include -I$DXDIR/include -DPA_NO_WMME -DPA_NO_ASIO" -DPA_NO_WDMKS;
elif [[ $with_winapi = "asio" ]] ; then
if [[ $with_asiodir ]] ; then
ASIODIR="$with_asiodir";
@ -146,12 +182,13 @@ case "${host_os}" in
fi
echo "ASIODIR: $ASIODIR"
OTHER_OBJS="pa_asio/pa_asio.o pa_win/pa_win_hostapis.o pa_win/pa_win_util.o pa_asio/iasiothiscallresolver.o $ASIODIR/common/asio.o $ASIODIR/host/asiodrivers.o $ASIODIR/host/pc/asiolist.o";
OTHER_OBJS="pa_asio/pa_asio.o src/os/win/pa_win_hostapis.o src/os/win/pa_win_util.o pa_asio/iasiothiscallresolver.o $ASIODIR/common/asio.o $ASIODIR/host/asiodrivers.o $ASIODIR/host/pc/asiolist.o";
LIBS="-lwinmm -lm -lstdc++ -lole32 -luuid";
PADLL="portaudio.dll";
SHARED_FLAGS="-shared -mthreads";
DLL_LIBS="-lwinmm -lm -lstdc++ -lole32 -luuid";
CFLAGS="$CFLAGS -ffast-math -fomit-frame-pointer -Ipa_common -Ipa_asio -I$ASIODIR/host/pc -I$ASIODIR/common -I$ASIODIR/host -DPA_NO_WMME -DPA_NO_DS -DPA_NO_WDMKS -DWINDOWS";
THREAD_CFLAGS="-mthreads"
SHARED_FLAGS="-shared";
DLL_LIBS="${DLL_LIBS} -lwinmm -lm -lstdc++ -lole32 -luuid";
CFLAGS="$CFLAGS -ffast-math -fomit-frame-pointer -I\$(top_srcdir)/src/common -I\$(top_srcdir)/pa_asio -I$ASIODIR/host/pc -I$ASIODIR/common -I$ASIODIR/host -DPA_NO_WMME -DPA_NO_DS -DPA_NO_WDMKS -DWINDOWS";
CXXFLAGS="$CFLAGS";
elif [[ $with_winapi = "wdmks" ]] ; then
if [[ $with_dxdir ]] ; then
@ -160,32 +197,35 @@ case "${host_os}" in
DXDIR="/usr/local/dx7sdk";
fi
echo "DXDIR: $DXDIR"
OTHER_OBJS="pa_win_wdmks/pa_win_wdmks.o pa_win/pa_win_hostapis.o pa_win/pa_win_util.o";
OTHER_OBJS="src/hostapi/wdmks/pa_win_wdmks.o src/os/win/pa_win_hostapis.o src/os/win/pa_win_util.o";
LIBS="-lwinmm -lm -luuid -lsetupapi -lole32";
PADLL="portaudio.dll";
SHARED_FLAGS="-shared -mthreads";
DLL_LIBS="-lwinmm -lm -L./dx7sdk/lib -luuid -lsetupapi -lole32";
THREAD_CFLAGS="-mthreads"
SHARED_FLAGS="-shared";
DLL_LIBS="${DLL_LIBS} -lwinmm -lm -L./dx7sdk/lib -luuid -lsetupapi -lole32";
#VC98="\"/c/Program Files/Microsoft Visual Studio/VC98/Include\"";
#CFLAGS="$CFLAGS -I$VC98 -DPA_NO_WMME -DPA_NO_ASIO";
CFLAGS="$CFLAGS -Ipa_common -I$DXDIR/include -DPA_NO_WMME -DPA_NO_DS -DPA_NO_ASIO";
CFLAGS="$CFLAGS -I\$(top_srcdir)/src/common -I$DXDIR/include -DPA_NO_WMME -DPA_NO_DS -DPA_NO_ASIO";
else # WMME default
OTHER_OBJS="pa_win_wmme/pa_win_wmme.o pa_win/pa_win_hostapis.o pa_win/pa_win_util.o";
OTHER_OBJS="src/hostapi/wmme/pa_win_wmme.o src/os/win/pa_win_hostapis.o src/os/win/pa_win_util.o";
LIBS="-lwinmm -lm -lstdc++ -lole32 -luuid";
PADLL="portaudio.dll";
SHARED_FLAGS="-shared -mthreads";
DLL_LIBS="-lwinmm";
CFLAGS="$CFLAGS -Ipa_common -DPA_NO_DS -DPA_NO_ASIO -DPA_NO_WDMKS";
THREAD_CFLAGS="-mthreads"
SHARED_FLAGS="-shared";
DLL_LIBS="${DLL_LIBS} -lwinmm";
CFLAGS="$CFLAGS -I\$(top_srcdir)/src/common -DPA_NO_DS -DPA_NO_ASIO -DPA_NO_WDMKS";
fi
;;
cygwin* )
dnl Cygwin configuration
OTHER_OBJS="pa_win_wmme/pa_win_wmme.o";
OTHER_OBJS="src/hostapi/wmme/pa_win_wmme.o";
LIBS="-lwinmm -lm";
PADLL="portaudio.dll";
SHARED_FLAGS="-shared -mthreads";
DLL_LIBS="-lwinmm";
THREAD_CFLAGS="-mthreads"
SHARED_FLAGS="-shared";
DLL_LIBS="${DLL_LIBS} -lwinmm";
;;
irix* )
@ -203,48 +243,68 @@ case "${host_os}" in
dnl The _REENTRANT option for pthread safety. Perhaps not necessary but it 'll do no harm.
dnl
CFLAGS="$CFLAGS -D_REENTRANT"
THREAD_CFLAGS="-D_REENTRANT"
OTHER_OBJS="pa_sgi/pa_sgi.o pa_unix/pa_unix_hostapis.o pa_unix/pa_unix_util.o";
OTHER_OBJS="pa_sgi/pa_sgi.o src/os/unix/pa_unix_hostapis.o src/os/unix/pa_unix_util.o";
dnl SGI books say -lpthread should be the last of the libs mentioned.
dnl
LIBS="-lm -ldmedia -laudio -lpthread";
PADLL="libportaudio.so";
SHARED_FLAGS="-shared";
SHARED_FLAGS="";
;;
*)
dnl Unix configuration
AC_CHECK_LIB(pthread, pthread_create,
AC_CHECK_LIB(pthread, pthread_create,[have_pthread="yes"]
,
AC_MSG_ERROR([libpthread not found!]))
if [[ $have_alsa = "yes" ] && [ $with_alsa != "no" ]] ; then
LIBS="$LIBS -lasound"
DLL_LIBS="$DLL_LIBS -lasound"
OTHER_OBJS="$OTHER_OBJS pa_linux_alsa/pa_linux_alsa.o"
OTHER_OBJS="$OTHER_OBJS src/hostapi/alsa/pa_linux_alsa.o"
AC_DEFINE(PA_USE_ALSA)
fi
if [[ $have_jack = "yes" ] && [ $with_jack != "no" ]] ; then
LIBS="$LIBS $JACK_LIBS"
DLL_LIBS="$DLL_LIBS $JACK_LIBS"
CFLAGS="$CFLAGS $JACK_CFLAGS"
OTHER_OBJS="$OTHER_OBJS pa_jack/pa_jack.o"
OTHER_OBJS="$OTHER_OBJS src/hostapi/jack/pa_jack.o"
AC_DEFINE(PA_USE_JACK)
fi
if [[ $with_oss != "no" ]] ; then
OTHER_OBJS="$OTHER_OBJS pa_unix_oss/pa_unix_oss.o"
OTHER_OBJS="$OTHER_OBJS src/hostapi/oss/pa_unix_oss.o"
AC_DEFINE(PA_USE_OSS)
fi
if [[ $have_asihpi = "yes" ] && [ $with_asihpi != "no" ]] ; then
LIBS="$LIBS -lhpi"
DLL_LIBS="$DLL_LIBS -lhpi"
OTHER_OBJS="$OTHER_OBJS src/hostapi/asihpi/pa_linux_asihpi.o"
AC_DEFINE(PA_USE_ASIHPI)
fi
THREAD_CFLAGS="-pthread"
DLL_LIBS="$DLL_LIBS -lm -lpthread";
LIBS="$LIBS -lm -lpthread";
PADLL="libportaudio.so";
SHARED_FLAGS="-shared -fPIC";
OTHER_OBJS="$OTHER_OBJS pa_unix/pa_unix_hostapis.o pa_unix/pa_unix_util.o"
OTHER_OBJS="$OTHER_OBJS src/os/unix/pa_unix_hostapis.o src/os/unix/pa_unix_util.o"
esac
CFLAGS="$CFLAGS $THREAD_CFLAGS"
AC_OUTPUT([Makefile])
if test "$enable_cxx" = "yes"; then
AC_CONFIG_SUBDIRS([bindings/cpp])
ENABLE_CXX_TRUE=""
ENABLE_CXX_FALE="#"
else
ENABLE_CXX_TRUE="#"
ENABLE_CXX_FALE=""
fi
AC_SUBST(ENABLE_CXX_TRUE)
AC_SUBST(ENABLE_CXX_FALSE)
AC_OUTPUT([Makefile portaudio-2.0.pc])

122
portaudio-v19/include/pa_asio.h Normal file
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@ -0,0 +1,122 @@
#ifndef PA_ASIO_H
#define PA_ASIO_H
/*
* $Id$
* PortAudio Portable Real-Time Audio Library
* ASIO specific extensions
*
* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
/** @file
@brief ASIO-specific PortAudio API extension header file.
*/
#include "portaudio.h"
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/** Retrieve legal latency settings for the specificed device, in samples.
@param device The global index of the device about which the query is being made.
@param minLatency A pointer to the location which will recieve the minimum latency value.
@param maxLatency A pointer to the location which will recieve the maximum latency value.
@param preferredLatency A pointer to the location which will recieve the preferred latency value.
@param granularity A pointer to the location which will recieve the granularity. This value
determines which values between minLatency and maxLatency are available. ie the step size,
if granularity is -1 then available latency settings are powers of two.
@see ASIOGetBufferSize in the ASIO SDK.
@todo This function should have a better name, any suggestions?
*/
PaError PaAsio_GetAvailableLatencyValues( PaDeviceIndex device,
long *minLatency, long *maxLatency, long *preferredLatency, long *granularity );
/** Display the ASIO control panel for the specified device.
@param device The global index of the device whose control panel is to be displayed.
@param systemSpecific On Windows, the calling application's main window handle,
on Macintosh this value should be zero.
*/
PaError PaAsio_ShowControlPanel( PaDeviceIndex device, void* systemSpecific );
/** Retrieve a pointer to a string containing the name of the specified
input channel. The string is valid until Pa_Terminate is called.
The string will be no longer than 32 characters including the null terminator.
*/
PaError PaAsio_GetInputChannelName( PaDeviceIndex device, int channelIndex,
const char** channelName );
/** Retrieve a pointer to a string containing the name of the specified
input channel. The string is valid until Pa_Terminate is called.
The string will be no longer than 32 characters including the null terminator.
*/
PaError PaAsio_GetOutputChannelName( PaDeviceIndex device, int channelIndex,
const char** channelName );
#define paAsioUseChannelSelectors (0x01)
typedef struct PaAsioStreamInfo{
unsigned long size; /**< sizeof(PaAsioStreamInfo) */
PaHostApiTypeId hostApiType; /**< paASIO */
unsigned long version; /**< 1 */
unsigned long flags;
/* Support for opening only specific channels of an ASIO device.
If the paAsioUseChannelSelectors flag is set, channelSelectors is a
pointer to an array of integers specifying the device channels to use.
When used, the length of the channelSelectors array must match the
corresponding channelCount parameter to Pa_OpenStream() otherwise a
crash may result.
The values in the selectors array must specify channels within the
range of supported channels for the device or paInvalidChannelCount will
result.
*/
int *channelSelectors;
}PaAsioStreamInfo;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_ASIO_H */

64
portaudio-v19/include/pa_linux_alsa.h Normal file
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@ -0,0 +1,64 @@
#ifndef PA_LINUX_ALSA_H
#define PA_LINUX_ALSA_H
/*
* $Id$
* PortAudio Portable Real-Time Audio Library
* ALSA-specific extensions
*
* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
/** @file
* ALSA-specific PortAudio API extension header file.
*/
#ifdef __cplusplus
extern "C" {
#endif
typedef struct PaAlsaStreamInfo
{
unsigned long size;
PaHostApiTypeId hostApiType;
unsigned long version;
const char *deviceString;
}
PaAlsaStreamInfo;
void PaAlsa_InitializeStreamInfo( PaAlsaStreamInfo *info );
void PaAlsa_EnableRealtimeScheduling( PaStream *s, int enable );
void PaAlsa_EnableWatchdog( PaStream *s, int enable );
#ifdef __cplusplus
}
#endif
#endif

70
portaudio-v19/include/pa_mac_core.h Normal file
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@ -0,0 +1,70 @@
/*
* Mac spcific flags for PA.
* portaudio.h should be included before this file.
*/
/*
* A pointer to a paMacCoreStreamInfo may be passed as
* the hostApiSpecificStreamInfo in the PaStreamParameters struct
* when opening a stream or querying the format. Use NULL, for the
* defaults. Note that for duplex streams, both infos should be the
* same or behaviour is undefined.
*/
typedef struct paMacCoreStreamInfo
{
unsigned long size; /**size of whole structure including this header */
PaHostApiTypeId hostApiType;/**host API for which this data is intended */
unsigned long version; /**structure version */
unsigned long flags; /* flags to modify behaviour */
} paMacCoreStreamInfo;
/* Use this function to initialize a paMacCoreStreamInfo struct
using the requested flags. */
void paSetupMacCoreStreamInfo( paMacCoreStreamInfo *data, unsigned long flags )
{
bzero( data, sizeof( paMacCoreStreamInfo ) );
data->size = sizeof( paMacCoreStreamInfo );
data->hostApiType = paCoreAudio;
data->version = 0x01;
data->flags = flags;
}
/*
* The following flags alter the behaviour of PA on the mac platform.
* they can be ORed together. These should work both for opening and
* checking a device.
*/
/* Allows PortAudio to change things like the device's frame size,
* which allows for much lower latency, but might disrupt the device
* if other programs are using it, even when you are just Querying
* the device. */
const unsigned long paMacCore_ChangeDeviceParameters = 0x01;
/* In combination with the above flag,
* causes the stream opening to fail, unless the exact sample rates
* are supported by the device. */
const unsigned long paMacCore_FailIfConversionRequired = 0x02;
/* These flags set the SR conversion quality, if required. The wierd ordering
* allows Maximum Quality to be the default.*/
const unsigned long paMacCore_ConversionQualityMin = 0x0100;
const unsigned long paMacCore_ConversionQualityMedium = 0x0200;
const unsigned long paMacCore_ConversionQualityLow = 0x0300;
const unsigned long paMacCore_ConversionQualityHigh = 0x0400;
const unsigned long paMacCore_ConversionQualityMax = 0x0000;
/*
* Here are some "preset" combinations of flags (above) to get to some
* common configurations. THIS IS OVERKILL, but if more flags are added
* it won't be.
*/
/*This is the default setting: do as much sample rate conversion as possible
* and as little mucking with the device as possible. */
const unsigned long paMacCorePlayNice = 0x00;
/*This setting is tuned for pro audio apps. It allows SR conversion on input
and output, but it tries to set the appropriate SR on the device.*/
const unsigned long paMacCorePro = 0x01;
/*This is a setting to minimize CPU usage and still play nice.*/
const unsigned long paMacCoreMinimizeCPUButPlayNice = 0x0100;
/*This is a setting to minimize CPU usage, even if that means interrupting the device. */
const unsigned long paMacCoreMinimizeCPU = 0x0101;

160
portaudio-v19/include/pa_win_wmme.h Normal file
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@ -0,0 +1,160 @@
#ifndef PA_WIN_WMME_H
#define PA_WIN_WMME_H
/*
* $Id$
* PortAudio Portable Real-Time Audio Library
* MME specific extensions
*
* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
/** @file
@brief WMME-specific PortAudio API extension header file.
*/
#include "portaudio.h"
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
#define paWinMmeUseLowLevelLatencyParameters (0x01)
#define paWinMmeUseMultipleDevices (0x02) /* use mme specific multiple device feature */
/* By default, the mme implementation drops the processing thread's priority
to THREAD_PRIORITY_NORMAL and sleeps the thread if the CPU load exceeds 100%
This flag disables any priority throttling. The processing thread will always
run at THREAD_PRIORITY_TIME_CRITICAL.
*/
#define paWinMmeDontThrottleOverloadedProcessingThread (0x08)
typedef struct PaWinMmeDeviceAndChannelCount{
PaDeviceIndex device;
int channelCount;
}PaWinMmeDeviceAndChannelCount;
typedef struct PaWinMmeStreamInfo{
unsigned long size; /**< sizeof(PaWinMmeStreamInfo) */
PaHostApiTypeId hostApiType; /**< paMME */
unsigned long version; /**< 1 */
unsigned long flags;
/* low-level latency setting support
These settings control the number and size of host buffers in order
to set latency. They will be used instead of the generic parameters
to Pa_OpenStream() if flags contains the PaWinMmeUseLowLevelLatencyParameters
flag.
If PaWinMmeStreamInfo structures with PaWinMmeUseLowLevelLatencyParameters
are supplied for both input and output in a full duplex stream, then the
input and output framesPerBuffer must be the same, or the larger of the
two must be a multiple of the smaller, otherwise a
paIncompatibleHostApiSpecificStreamInfo error will be returned from
Pa_OpenStream().
*/
unsigned long framesPerBuffer;
unsigned long bufferCount; /* formerly numBuffers */
/* multiple devices per direction support
If flags contains the PaWinMmeUseMultipleDevices flag,
this functionality will be used, otherwise the device parameter to
Pa_OpenStream() will be used instead.
If devices are specified here, the corresponding device parameter
to Pa_OpenStream() should be set to paUseHostApiSpecificDeviceSpecification,
otherwise an paInvalidDevice error will result.
The total number of channels accross all specified devices
must agree with the corresponding channelCount parameter to
Pa_OpenStream() otherwise a paInvalidChannelCount error will result.
*/
PaWinMmeDeviceAndChannelCount *devices;
unsigned long deviceCount;
}PaWinMmeStreamInfo;
/** Retrieve the number of wave in handles used by a PortAudio WinMME stream.
Returns zero if the stream is output only.
@return A non-negative value indicating the number of wave in handles
or, a PaErrorCode (which are always negative) if PortAudio is not initialized
or an error is encountered.
@see PaWinMME_GetStreamInputHandle
*/
int PaWinMME_GetStreamInputHandleCount( PaStream* stream );
/** Retrieve a wave in handle used by a PortAudio WinMME stream.
@param stream The stream to query.
@param handleIndex The zero based index of the wave in handle to retrieve. This
should be in the range [0, PaWinMME_GetStreamInputHandle(stream)-1].
@return A valid wave in handle, or NULL if an error occurred.
@see PaWinMME_GetStreamInputHandle
*/
HWAVEIN PaWinMME_GetStreamInputHandle( PaStream* stream, int handleIndex );
/** Retrieve the number of wave out handles used by a PortAudio WinMME stream.
Returns zero if the stream is input only.
@return A non-negative value indicating the number of wave out handles
or, a PaErrorCode (which are always negative) if PortAudio is not initialized
or an error is encountered.
@see PaWinMME_GetStreamOutputHandle
*/
int PaWinMME_GetStreamOutputHandleCount( PaStream* stream );
/** Retrieve a wave out handle used by a PortAudio WinMME stream.
@param stream The stream to query.
@param handleIndex The zero based index of the wave out handle to retrieve.
This should be in the range [0, PaWinMME_GetStreamOutputHandleCount(stream)-1].
@return A valid wave out handle, or NULL if an error occurred.
@see PaWinMME_GetStreamOutputHandleCount
*/
HWAVEOUT PaWinMME_GetStreamOutputHandle( PaStream* stream, int handleIndex );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_WIN_WMME_H */

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import os.path, copy, sys
def checkSymbol(conf, header, library=None, symbol=None, autoAdd=True, critical=False, pkgName=None):
""" Check for symbol in library, optionally look only for header.
@param conf: Configure instance.
@param header: The header file where the symbol is declared.
@param library: The library in which the symbol exists, if None it is taken to be the standard C library.
@param symbol: The symbol to look for, if None only the header will be looked up.
@param autoAdd: Automatically link with this library if check is positive.
@param critical: Raise on error?
@param pkgName: Optional name of pkg-config entry for library, to determine build parameters.
@return: True/False
"""
origEnv = conf.env.Copy() # Copy unmodified environment so we can restore it upon error
env = conf.env
if library is None:
library = "c" # Standard library
autoAdd = False
if pkgName is not None:
origLibs = copy.copy(env.get("LIBS", None))
try: env.ParseConfig("pkg-config --silence-errors %s --cflags --libs" % pkgName)
except: pass
else:
# I see no other way of checking that the parsing succeeded, if it did add no more linking parameters
if env.get("LIBS", None) != origLibs:
autoAdd = False
try:
if not conf.CheckCHeader(header, include_quotes="<>"):
raise ConfigurationError("missing header %s" % header)
if symbol is not None and not conf.CheckLib(library, symbol, language="C", autoadd=autoAdd):
raise ConfigurationError("missing symbol %s in library %s" % (symbol, library))
except ConfigurationError:
conf.env = origEnv
if not critical:
return False
raise
return True
import SCons.Errors
# Import common variables
# Could use '#' to refer to top-level SConstruct directory, but looks like env.SConsignFile doesn't interpret this at least :(
sconsDir = os.path.abspath(os.path.join("build", "scons"))
try:
Import("Platform", "Posix", "ConfigurationError", "ApiVer")
except SCons.Errors.UserError:
# The common objects must be exported first
SConscript(os.path.join(sconsDir, "SConscript_common"))
Import("Platform", "Posix", "ConfigurationError", "ApiVer")
Import("env")
# This will be manipulated
env = env.Copy()
# We operate with a set of needed libraries and optional libraries, the latter stemming from host API implementations.
# For libraries of both types we record a set of values that is used to look for the library in question, during
# configuration. If the corresponding library for a host API implementation isn't found, the implementation is left out.
neededLibs = []
optionalImpls = {}
if Platform in Posix:
env.Append(CPPPATH=os.path.join("os", "unix"))
neededLibs += [("pthread", "pthread.h", "pthread_create"), ("m", "math.h", "sin")]
if env["useALSA"]:
optionalImpls["ALSA"] = ("asound", "alsa/asoundlib.h", "snd_pcm_open")
if env["useJACK"]:
optionalImpls["JACK"] = ("jack", "jack/jack.h", "jack_client_new")
if env["useOSS"]:
# TODO: It looks like the prefix for soundcard.h depends on the platform
optionalImpls["OSS"] = ("oss", "sys/soundcard.h", None)
if env["useASIHPI"]:
optionalImpls["ASIHPI"] = ("hpi", "asihpi/hpi.h", "HPI_SubSysCreate")
else:
raise ConfigurationError("unknown platform %s" % Platform)
if Platform == "darwin":
env.Append(LINKFLAGS=["-framework CoreAudio", "-framework AudioToolBox"])
env.Append(CPPDEFINES=["PA_USE_COREAUDIO"])
elif Platform == "cygwin":
env.Append(LIBS=["winmm"])
elif Platform == "irix":
neededLibs += [("audio", "dmedia/audio.h", "alOpenPort"), ("dmedia", "dmedia/dmedia.h", "dmGetUST")]
env.Append(CPPDEFINES=["PA_USE_SGI"])
def CheckCTypeSize(context, tp):
""" Check size of C type.
@param context: A configuration context.
@param tp: The type to check.
@return: Size of type, in bytes.
"""
context.Message("Checking the size of C type %s..." % tp)
ret = context.TryRun("""
#include <stdio.h>
int main() {
printf("%%d", sizeof(%s));
return 0;
}
""" % tp, ".c")
if not ret[0]:
context.Result(" Couldn't obtain size of type %s!" % tp)
return None
assert ret[1]
sz = int(ret[1])
context.Result("%d" % sz)
return sz
"""
if sys.byteorder == "little":
env.Append(CPPDEFINES=["PA_LITTLE_ENDIAN"])
elif sys.byteorder == "big":
env.Append(CPPDEFINES=["PA_BIG_ENDIAN"])
else:
raise ConfigurationError("unknown byte order: %s" % sys.byteorder)
"""
if env["enableDebugOutput"]:
env.Append(CPPDEFINES=["PA_ENABLE_DEBUG_OUTPUT"])
# Start configuration
# Use an absolute path for conf_dir, otherwise it gets created both relative to current directory and build directory
conf = env.Configure(log_file=os.path.join(sconsDir, "sconf.log"), custom_tests={"CheckCTypeSize": CheckCTypeSize},
conf_dir=os.path.join(sconsDir, ".sconf_temp"))
conf.env.Append(CPPDEFINES=["SIZEOF_SHORT=%d" % conf.CheckCTypeSize("short")])
conf.env.Append(CPPDEFINES=["SIZEOF_INT=%d" % conf.CheckCTypeSize("int")])
conf.env.Append(CPPDEFINES=["SIZEOF_LONG=%d" % conf.CheckCTypeSize("long")])
if checkSymbol(conf, "time.h", "rt", "clock_gettime"):
conf.env.Append(CPPDEFINES=["HAVE_CLOCK_GETTIME"])
if checkSymbol(conf, "time.h", symbol="nanosleep"):
conf.env.Append(CPPDEFINES=["HAVE_NANOSLEEP"])
# Look for needed libraries and link with them
for lib, hdr, sym in neededLibs:
checkSymbol(conf, hdr, lib, sym, critical=True)
# Look for host API libraries, if a library isn't found disable corresponding host API implementation.
for name, val in optionalImpls.items():
lib, hdr, sym = val
if checkSymbol(conf, hdr, lib, sym, critical=False, pkgName=name.lower()):
conf.env.Append(CPPDEFINES=["PA_USE_%s=1" % name.upper()])
else:
del optionalImpls[name]
# Configuration finished
env = conf.Finish()
# PA infrastructure
CommonSources = [os.path.join("common", f) for f in "pa_allocation.c pa_converters.c pa_cpuload.c pa_dither.c pa_front.c \
pa_process.c pa_skeleton.c pa_stream.c pa_trace.c".split()]
# Host API implementations
ImplSources = []
if Platform in Posix:
ImplSources += [os.path.join("os", "unix", f) for f in "pa_unix_hostapis.c pa_unix_util.c".split()]
if "ALSA" in optionalImpls:
ImplSources.append(os.path.join("hostapi", "alsa", "pa_linux_alsa.c"))
if "JACK" in optionalImpls:
ImplSources.append(os.path.join("hostapi", "jack", "pa_jack.c"))
if "OSS" in optionalImpls:
ImplSources.append(os.path.join("hostapi", "oss", "pa_unix_oss.c"))
if "ASIHPI" in optionalImpls:
ImplSources.append(os.path.join("hostapi", "asihpi", "pa_linux_asihpi.c"))
sources = CommonSources + ImplSources
sharedLibEnv = env.Copy()
if Platform in Posix:
# Add soname to library, this is so a reference is made to the versioned library in programs linking against libportaudio.so
sharedLibEnv.AppendUnique(SHLINKFLAGS="-Wl,-soname=libportaudio.so.%d" % int(ApiVer.split(".")[0]))
sharedLib = sharedLibEnv.SharedLibrary(target="portaudio", source=sources)
staticLib = env.StaticLibrary(target="portaudio", source=sources)
if Platform in Posix:
prefix = env["prefix"]
includeDir = os.path.join(prefix, "include")
libDir = os.path.join(prefix, "lib")
testNames = ["patest_sine", "paqa_devs", "paqa_errs", "patest1", "patest_buffer", "patest_callbackstop", "patest_clip", \
"patest_dither", "patest_hang", "patest_in_overflow", "patest_latency", "patest_leftright", "patest_longsine", \
"patest_many", "patest_maxsines", "patest_multi_sine", "patest_out_underflow", "patest_pink", "patest_prime", \
"patest_read_record", "patest_record", "patest_ringmix", "patest_saw", "patest_sine8", "patest_sine", \
"patest_sine_time", "patest_start_stop", "patest_stop", "patest_sync", \
"patest_toomanysines", "patest_underflow", "patest_wire", "patest_write_sine", "pa_devs", "pa_fuzz", "pa_minlat"]
# The test directory ("bin") should be in the top-level PA directory
tests = [env.Program(target=os.path.join("#", "bin", name), source=[os.path.join("#", "test", name + ".c"),
staticLib]) for name in testNames]
Return("sources", "sharedLib", "staticLib", "tests", "env")

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/*
* $Id$
* Portable Audio I/O Library allocation group implementation
* memory allocation group for tracking allocation groups
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Allocation Group implementation.
*/
#include "pa_allocation.h"
#include "pa_util.h"
/*
Maintain 3 singly linked lists...
linkBlocks: the buffers used to allocate the links
spareLinks: links available for use in the allocations list
allocations: the buffers currently allocated using PaUtil_ContextAllocateMemory()
Link block size is doubled every time new links are allocated.
*/
#define PA_INITIAL_LINK_COUNT_ 16
struct PaUtilAllocationGroupLink
{
struct PaUtilAllocationGroupLink *next;
void *buffer;
};
/*
Allocate a block of links. The first link will have it's buffer member
pointing to the block, and it's next member set to <nextBlock>. The remaining
links will have NULL buffer members, and each link will point to
the next link except the last, which will point to <nextSpare>
*/
static struct PaUtilAllocationGroupLink *AllocateLinks( long count,
struct PaUtilAllocationGroupLink *nextBlock,
struct PaUtilAllocationGroupLink *nextSpare )
{
struct PaUtilAllocationGroupLink *result;
int i;
result = (struct PaUtilAllocationGroupLink *)PaUtil_AllocateMemory(
sizeof(struct PaUtilAllocationGroupLink) * count );
if( result )
{
/* the block link */
result[0].buffer = result;
result[0].next = nextBlock;
/* the spare links */
for( i=1; i<count; ++i )
{
result[i].buffer = 0;
result[i].next = &result[i+1];
}
result[count-1].next = nextSpare;
}
return result;
}
PaUtilAllocationGroup* PaUtil_CreateAllocationGroup( void )
{
PaUtilAllocationGroup* result = 0;
struct PaUtilAllocationGroupLink *links;
links = AllocateLinks( PA_INITIAL_LINK_COUNT_, 0, 0 );
if( links != 0 )
{
result = (PaUtilAllocationGroup*)PaUtil_AllocateMemory( sizeof(PaUtilAllocationGroup) );
if( result )
{
result->linkCount = PA_INITIAL_LINK_COUNT_;
result->linkBlocks = &links[0];
result->spareLinks = &links[1];
result->allocations = 0;
}
else
{
PaUtil_FreeMemory( links );
}
}
return result;
}
void PaUtil_DestroyAllocationGroup( PaUtilAllocationGroup* group )
{
struct PaUtilAllocationGroupLink *current = group->linkBlocks;
struct PaUtilAllocationGroupLink *next;
while( current )
{
next = current->next;
PaUtil_FreeMemory( current->buffer );
current = next;
}
PaUtil_FreeMemory( group );
}
void* PaUtil_GroupAllocateMemory( PaUtilAllocationGroup* group, long size )
{
struct PaUtilAllocationGroupLink *links, *link;
void *result = 0;
/* allocate more links if necessary */
if( !group->spareLinks )
{
/* double the link count on each block allocation */
links = AllocateLinks( group->linkCount, group->linkBlocks, group->spareLinks );
if( links )
{
group->linkCount += group->linkCount;
group->linkBlocks = &links[0];
group->spareLinks = &links[1];
}
}
if( group->spareLinks )
{
result = PaUtil_AllocateMemory( size );
if( result )
{
link = group->spareLinks;
group->spareLinks = link->next;
link->buffer = result;
link->next = group->allocations;
group->allocations = link;
}
}
return result;
}
void PaUtil_GroupFreeMemory( PaUtilAllocationGroup* group, void *buffer )
{
struct PaUtilAllocationGroupLink *current = group->allocations;
struct PaUtilAllocationGroupLink *previous = 0;
if( buffer == 0 )
return;
/* find the right link and remove it */
while( current )
{
if( current->buffer == buffer )
{
if( previous )
{
previous->next = current->next;
}
else
{
group->allocations = current->next;
}
current->buffer = 0;
current->next = group->spareLinks;
group->spareLinks = current;
break;
}
previous = current;
current = current->next;
}
PaUtil_FreeMemory( buffer ); /* free the memory whether we found it in the list or not */
}
void PaUtil_FreeAllAllocations( PaUtilAllocationGroup* group )
{
struct PaUtilAllocationGroupLink *current = group->allocations;
struct PaUtilAllocationGroupLink *previous = 0;
/* free all buffers in the allocations list */
while( current )
{
PaUtil_FreeMemory( current->buffer );
current->buffer = 0;
previous = current;
current = current->next;
}
/* link the former allocations list onto the front of the spareLinks list */
if( previous )
{
previous->next = group->spareLinks;
group->spareLinks = group->allocations;
group->allocations = 0;
}
}

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#ifndef PA_ALLOCATION_H
#define PA_ALLOCATION_H
/*
* $Id$
* Portable Audio I/O Library allocation context header
* memory allocation context for tracking allocation groups
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Allocation Group prototypes. An Allocation Group makes it easy to
allocate multiple blocks of memory and free them all simultanously.
An allocation group is useful for keeping track of multiple blocks
of memory which are allocated at the same time (such as during initialization)
and need to be deallocated at the same time. The allocation group maintains
a list of allocated blocks, and can deallocate them all simultaneously which
can be usefull for cleaning up after a partially initialized object fails.
The allocation group implementation is built on top of the lower
level allocation functions defined in pa_util.h
*/
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
typedef struct
{
long linkCount;
struct PaUtilAllocationGroupLink *linkBlocks;
struct PaUtilAllocationGroupLink *spareLinks;
struct PaUtilAllocationGroupLink *allocations;
}PaUtilAllocationGroup;
/** Create an allocation group.
*/
PaUtilAllocationGroup* PaUtil_CreateAllocationGroup( void );
/** Destroy an allocation group, but not the memory allocated through the group.
*/
void PaUtil_DestroyAllocationGroup( PaUtilAllocationGroup* group );
/** Allocate a block of memory though an allocation group.
*/
void* PaUtil_GroupAllocateMemory( PaUtilAllocationGroup* group, long size );
/** Free a block of memory that was previously allocated though an allocation
group. Calling this function is a relatively time consuming operation.
Under normal circumstances clients should call PaUtil_FreeAllAllocations to
free all allocated blocks simultaneously.
@see PaUtil_FreeAllAllocations
*/
void PaUtil_GroupFreeMemory( PaUtilAllocationGroup* group, void *buffer );
/** Free all blocks of memory which have been allocated through the allocation
group. This function doesn't destroy the group itself.
*/
void PaUtil_FreeAllAllocations( PaUtilAllocationGroup* group );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_ALLOCATION_H */

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#ifndef PA_CONVERTERS_H
#define PA_CONVERTERS_H
/*
* $Id$
* Portable Audio I/O Library sample conversion mechanism
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Phil Burk, Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Conversion functions used to convert buffers of samples from one
format to another.
*/
#include "portaudio.h" /* for PaSampleFormat */
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
struct PaUtilTriangularDitherGenerator;
/** Choose an available sample format which is most appropriate for
representing the requested format. If the requested format is not available
higher quality formats are considered before lower quality formates.
@param availableFormats A variable containing the logical OR of all available
formats.
@param format The desired format.
@return The most appropriate available format for representing the requested
format.
*/
PaSampleFormat PaUtil_SelectClosestAvailableFormat(
PaSampleFormat availableFormats, PaSampleFormat format );
/* high level conversions functions for use by implementations */
/** The generic sample converter prototype. Sample converters convert count
samples from sourceBuffer to destinationBuffer. The actual type of the data
pointed to by these parameters varys for different converter functions.
@param destinationBuffer A pointer to the first sample of the destination.
@param destinationStride An offset between successive destination samples
expressed in samples (not bytes.) It may be negative.
@param sourceBuffer A pointer to the first sample of the source.
@param sourceStride An offset between successive source samples
expressed in samples (not bytes.) It may be negative.
@param count The number of samples to convert.
@param ditherState State information used to calculate dither. Converters
that do not perform dithering will ignore this parameter, in which case
NULL or invalid dither state may be passed.
*/
typedef void PaUtilConverter(
void *destinationBuffer, signed int destinationStride,
void *sourceBuffer, signed int sourceStride,
unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator );
/** Find a sample converter function for the given source and destinations
formats and flags (clip and dither.)
@return
A pointer to a PaUtilConverter which will perform the requested
conversion, or NULL if the given format conversion is not supported.
For conversions where clipping or dithering is not necessary, the
clip and dither flags are ignored and a non-clipping or dithering
version is returned.
If the source and destination formats are the same, a function which
copies data of the appropriate size will be returned.
*/
PaUtilConverter* PaUtil_SelectConverter( PaSampleFormat sourceFormat,
PaSampleFormat destinationFormat, PaStreamFlags flags );
/** The generic buffer zeroer prototype. Buffer zeroers copy count zeros to
destinationBuffer. The actual type of the data pointed to varys for
different zeroer functions.
@param destinationBuffer A pointer to the first sample of the destination.
@param destinationStride An offset between successive destination samples
expressed in samples (not bytes.) It may be negative.
@param count The number of samples to zero.
*/
typedef void PaUtilZeroer(
void *destinationBuffer, signed int destinationStride, unsigned int count );
/** Find a buffer zeroer function for the given destination format.
@return
A pointer to a PaUtilZeroer which will perform the requested
zeroing.
*/
PaUtilZeroer* PaUtil_SelectZeroer( PaSampleFormat destinationFormat );
/*----------------------------------------------------------------------------*/
/* low level functions and data structures which may be used for
substituting conversion functions */
/** The type used to store all sample conversion functions.
@see paConverters;
*/
typedef struct{
PaUtilConverter *Float32_To_Int32;
PaUtilConverter *Float32_To_Int32_Dither;
PaUtilConverter *Float32_To_Int32_Clip;
PaUtilConverter *Float32_To_Int32_DitherClip;
PaUtilConverter *Float32_To_Int24;
PaUtilConverter *Float32_To_Int24_Dither;
PaUtilConverter *Float32_To_Int24_Clip;
PaUtilConverter *Float32_To_Int24_DitherClip;
PaUtilConverter *Float32_To_Int16;
PaUtilConverter *Float32_To_Int16_Dither;
PaUtilConverter *Float32_To_Int16_Clip;
PaUtilConverter *Float32_To_Int16_DitherClip;
PaUtilConverter *Float32_To_Int8;
PaUtilConverter *Float32_To_Int8_Dither;
PaUtilConverter *Float32_To_Int8_Clip;
PaUtilConverter *Float32_To_Int8_DitherClip;
PaUtilConverter *Float32_To_UInt8;
PaUtilConverter *Float32_To_UInt8_Dither;
PaUtilConverter *Float32_To_UInt8_Clip;
PaUtilConverter *Float32_To_UInt8_DitherClip;
PaUtilConverter *Int32_To_Float32;
PaUtilConverter *Int32_To_Int24;
PaUtilConverter *Int32_To_Int24_Dither;
PaUtilConverter *Int32_To_Int16;
PaUtilConverter *Int32_To_Int16_Dither;
PaUtilConverter *Int32_To_Int8;
PaUtilConverter *Int32_To_Int8_Dither;
PaUtilConverter *Int32_To_UInt8;
PaUtilConverter *Int32_To_UInt8_Dither;
PaUtilConverter *Int24_To_Float32;
PaUtilConverter *Int24_To_Int32;
PaUtilConverter *Int24_To_Int16;
PaUtilConverter *Int24_To_Int16_Dither;
PaUtilConverter *Int24_To_Int8;
PaUtilConverter *Int24_To_Int8_Dither;
PaUtilConverter *Int24_To_UInt8;
PaUtilConverter *Int24_To_UInt8_Dither;
PaUtilConverter *Int16_To_Float32;
PaUtilConverter *Int16_To_Int32;
PaUtilConverter *Int16_To_Int24;
PaUtilConverter *Int16_To_Int8;
PaUtilConverter *Int16_To_Int8_Dither;
PaUtilConverter *Int16_To_UInt8;
PaUtilConverter *Int16_To_UInt8_Dither;
PaUtilConverter *Int8_To_Float32;
PaUtilConverter *Int8_To_Int32;
PaUtilConverter *Int8_To_Int24;
PaUtilConverter *Int8_To_Int16;
PaUtilConverter *Int8_To_UInt8;
PaUtilConverter *UInt8_To_Float32;
PaUtilConverter *UInt8_To_Int32;
PaUtilConverter *UInt8_To_Int24;
PaUtilConverter *UInt8_To_Int16;
PaUtilConverter *UInt8_To_Int8;
PaUtilConverter *Copy_8_To_8; /* copy without any conversion */
PaUtilConverter *Copy_16_To_16; /* copy without any conversion */
PaUtilConverter *Copy_24_To_24; /* copy without any conversion */
PaUtilConverter *Copy_32_To_32; /* copy without any conversion */
} PaUtilConverterTable;
/** A table of pointers to all required converter functions.
PaUtil_SelectConverter() uses this table to lookup the appropriate
conversion functions. The fields of this structure are initialized
with default conversion functions. Fields may be NULL, indicating that
no conversion function is available. User code may substitue optimised
conversion functions by assigning different function pointers to
these fields.
@note
If the PA_NO_STANDARD_CONVERTERS preprocessor variable is defined,
PortAudio's standard converters will not be compiled, and all fields
of this structure will be initialized to NULL. In such cases, users
should supply their own conversion functions if the require PortAudio
to open a stream that requires sample conversion.
@see PaUtilConverterTable, PaUtilConverter, PaUtil_SelectConverter
*/
extern PaUtilConverterTable paConverters;
/** The type used to store all buffer zeroing functions.
@see paZeroers;
*/
typedef struct{
PaUtilZeroer *ZeroU8; /* unsigned 8 bit, zero == 128 */
PaUtilZeroer *Zero8;
PaUtilZeroer *Zero16;
PaUtilZeroer *Zero24;
PaUtilZeroer *Zero32;
} PaUtilZeroerTable;
/** A table of pointers to all required zeroer functions.
PaUtil_SelectZeroer() uses this table to lookup the appropriate
conversion functions. The fields of this structure are initialized
with default conversion functions. User code may substitue optimised
conversion functions by assigning different function pointers to
these fields.
@note
If the PA_NO_STANDARD_ZEROERS preprocessor variable is defined,
PortAudio's standard zeroers will not be compiled, and all fields
of this structure will be initialized to NULL. In such cases, users
should supply their own zeroing functions for the sample sizes which
they intend to use.
@see PaUtilZeroerTable, PaUtilZeroer, PaUtil_SelectZeroer
*/
extern PaUtilZeroerTable paZeroers;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_CONVERTERS_H */

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/*
* $Id$
* Portable Audio I/O Library CPU Load measurement functions
* Portable CPU load measurement facility.
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 2002 Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Functions to assist in measuring the CPU utilization of a callback
stream. Used to implement the Pa_GetStreamCpuLoad() function.
@todo Dynamically calculate the coefficients used to smooth the CPU Load
Measurements over time to provide a uniform characterisation of CPU Load
independent of rate at which PaUtil_BeginCpuLoadMeasurement /
PaUtil_EndCpuLoadMeasurement are called.
*/
#include "pa_cpuload.h"
#include <assert.h>
#include "pa_util.h" /* for PaUtil_GetTime() */
void PaUtil_InitializeCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer, double sampleRate )
{
assert( sampleRate > 0 );
measurer->samplingPeriod = 1. / sampleRate;
measurer->averageLoad = 0.;
}
void PaUtil_ResetCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer )
{
measurer->averageLoad = 0.;
}
void PaUtil_BeginCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer )
{
measurer->measurementStartTime = PaUtil_GetTime();
}
void PaUtil_EndCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer, unsigned long framesProcessed )
{
double measurementEndTime, secondsFor100Percent, measuredLoad;
if( framesProcessed > 0 ){
measurementEndTime = PaUtil_GetTime();
assert( framesProcessed > 0 );
secondsFor100Percent = framesProcessed * measurer->samplingPeriod;
measuredLoad = (measurementEndTime - measurer->measurementStartTime) / secondsFor100Percent;
/* Low pass filter the calculated CPU load to reduce jitter using a simple IIR low pass filter. */
/** FIXME @todo these coefficients shouldn't be hardwired */
#define LOWPASS_COEFFICIENT_0 (0.9)
#define LOWPASS_COEFFICIENT_1 (0.99999 - LOWPASS_COEFFICIENT_0)
measurer->averageLoad = (LOWPASS_COEFFICIENT_0 * measurer->averageLoad) +
(LOWPASS_COEFFICIENT_1 * measuredLoad);
}
}
double PaUtil_GetCpuLoad( PaUtilCpuLoadMeasurer* measurer )
{
return measurer->averageLoad;
}

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#ifndef PA_CPULOAD_H
#define PA_CPULOAD_H
/*
* $Id$
* Portable Audio I/O Library CPU Load measurement functions
* Portable CPU load measurement facility.
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 2002 Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Functions to assist in measuring the CPU utilization of a callback
stream. Used to implement the Pa_GetStreamCpuLoad() function.
*/
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
typedef struct {
double samplingPeriod;
double measurementStartTime;
double averageLoad;
} PaUtilCpuLoadMeasurer; /**< @todo need better name than measurer */
void PaUtil_InitializeCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer, double sampleRate );
void PaUtil_BeginCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer );
void PaUtil_EndCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer, unsigned long framesProcessed );
void PaUtil_ResetCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer );
double PaUtil_GetCpuLoad( PaUtilCpuLoadMeasurer* measurer );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_CPULOAD_H */

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/*
* $Id$
* Portable Audio I/O Library triangular dither generator
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Phil Burk, Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Functions for generating dither noise
*/
#include "pa_dither.h"
#include "pa_types.h"
#define PA_DITHER_BITS_ (15)
void PaUtil_InitializeTriangularDitherState( PaUtilTriangularDitherGenerator *state )
{
state->previous = 0;
state->randSeed1 = 22222;
state->randSeed2 = 5555555;
}
signed long PaUtil_Generate16BitTriangularDither( PaUtilTriangularDitherGenerator *state )
{
signed long current, highPass;
/* Generate two random numbers. */
state->randSeed1 = (state->randSeed1 * 196314165) + 907633515;
state->randSeed2 = (state->randSeed2 * 196314165) + 907633515;
/* Generate triangular distribution about 0.
* Shift before adding to prevent overflow which would skew the distribution.
* Also shift an extra bit for the high pass filter.
*/
#define DITHER_SHIFT_ ((SIZEOF_LONG*8 - PA_DITHER_BITS_) + 1)
current = (((signed long)state->randSeed1)>>DITHER_SHIFT_) +
(((signed long)state->randSeed2)>>DITHER_SHIFT_);
/* High pass filter to reduce audibility. */
highPass = current - state->previous;
state->previous = current;
return highPass;
}
/* Multiply by PA_FLOAT_DITHER_SCALE_ to get a float between -2.0 and +1.99999 */
#define PA_FLOAT_DITHER_SCALE_ (1.0f / ((1<<PA_DITHER_BITS_)-1))
static const float const_float_dither_scale_ = PA_FLOAT_DITHER_SCALE_;
float PaUtil_GenerateFloatTriangularDither( PaUtilTriangularDitherGenerator *state )
{
signed long current, highPass;
/* Generate two random numbers. */
state->randSeed1 = (state->randSeed1 * 196314165) + 907633515;
state->randSeed2 = (state->randSeed2 * 196314165) + 907633515;
/* Generate triangular distribution about 0.
* Shift before adding to prevent overflow which would skew the distribution.
* Also shift an extra bit for the high pass filter.
*/
#define DITHER_SHIFT_ ((SIZEOF_LONG*8 - PA_DITHER_BITS_) + 1)
current = (((signed long)state->randSeed1)>>DITHER_SHIFT_) +
(((signed long)state->randSeed2)>>DITHER_SHIFT_);
/* High pass filter to reduce audibility. */
highPass = current - state->previous;
state->previous = current;
return ((float)highPass) * const_float_dither_scale_;
}
/*
The following alternate dither algorithms (from musicdsp.org) could be
considered
*/
/*Noise shaped dither (March 2000)
-------------------
This is a simple implementation of highpass triangular-PDF dither with
2nd-order noise shaping, for use when truncating floating point audio
data to fixed point.
The noise shaping lowers the noise floor by 11dB below 5kHz (@ 44100Hz
sample rate) compared to triangular-PDF dither. The code below assumes
input data is in the range +1 to -1 and doesn't check for overloads!
To save time when generating dither for multiple channels you can do
things like this: r3=(r1 & 0x7F)<<8; instead of calling rand() again.
int r1, r2; //rectangular-PDF random numbers
float s1, s2; //error feedback buffers
float s = 0.5f; //set to 0.0f for no noise shaping
float w = pow(2.0,bits-1); //word length (usually bits=16)
float wi= 1.0f/w;
float d = wi / RAND_MAX; //dither amplitude (2 lsb)
float o = wi * 0.5f; //remove dc offset
float in, tmp;
int out;
//for each sample...
r2=r1; //can make HP-TRI dither by
r1=rand(); //subtracting previous rand()
in += s * (s1 + s1 - s2); //error feedback
tmp = in + o + d * (float)(r1 - r2); //dc offset and dither
out = (int)(w * tmp); //truncate downwards
if(tmp<0.0f) out--; //this is faster than floor()
s2 = s1;
s1 = in - wi * (float)out; //error
--
paul.kellett@maxim.abel.co.uk
http://www.maxim.abel.co.uk
*/
/*
16-to-8-bit first-order dither
Type : First order error feedforward dithering code
References : Posted by Jon Watte
Notes :
This is about as simple a dithering algorithm as you can implement, but it's
likely to sound better than just truncating to N bits.
Note that you might not want to carry forward the full difference for infinity.
It's probably likely that the worst performance hit comes from the saturation
conditionals, which can be avoided with appropriate instructions on many DSPs
and integer SIMD type instructions, or CMOV.
Last, if sound quality is paramount (such as when going from > 16 bits to 16
bits) you probably want to use a higher-order dither function found elsewhere
on this site.
Code :
// This code will down-convert and dither a 16-bit signed short
// mono signal into an 8-bit unsigned char signal, using a first
// order forward-feeding error term dither.
#define uchar unsigned char
void dither_one_channel_16_to_8( short * input, uchar * output, int count, int * memory )
{
int m = *memory;
while( count-- > 0 ) {
int i = *input++;
i += m;
int j = i + 32768 - 128;
uchar o;
if( j < 0 ) {
o = 0;
}
else if( j > 65535 ) {
o = 255;
}
else {
o = (uchar)((j>>8)&0xff);
}
m = ((j-32768+128)-i);
*output++ = o;
}
*memory = m;
}
*/

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#ifndef PA_DITHER_H
#define PA_DITHER_H
/*
* $Id$
* Portable Audio I/O Library triangular dither generator
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Phil Burk, Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Functions for generating dither noise
*/
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/** @brief State needed to generate a dither signal */
typedef struct PaUtilTriangularDitherGenerator{
unsigned long previous;
unsigned long randSeed1;
unsigned long randSeed2;
} PaUtilTriangularDitherGenerator;
/** @brief Initialize dither state */
void PaUtil_InitializeTriangularDitherState( PaUtilTriangularDitherGenerator *ditherState );
/**
@brief Calculate 2 LSB dither signal with a triangular distribution.
Ranged for adding to a 1 bit right-shifted 32 bit integer
prior to >>15. eg:
<pre>
signed long in = *
signed long dither = PaUtil_Generate16BitTriangularDither( ditherState );
signed short out = (signed short)(((in>>1) + dither) >> 15);
</pre>
@return
A signed long with a range of +32767 to -32768
*/
signed long PaUtil_Generate16BitTriangularDither( PaUtilTriangularDitherGenerator *ditherState );
/**
@brief Calculate 2 LSB dither signal with a triangular distribution.
Ranged for adding to a pre-scaled float.
<pre>
float in = *
float dither = PaUtil_GenerateFloatTriangularDither( ditherState );
// use smaller scaler to prevent overflow when we add the dither
signed short out = (signed short)(in*(32766.0f) + dither );
</pre>
@return
A float with a range of -2.0 to +1.99999.
*/
float PaUtil_GenerateFloatTriangularDither( PaUtilTriangularDitherGenerator *ditherState );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_DITHER_H */

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#ifndef PA_ENDIANNESS_H
#define PA_ENDIANNESS_H
/*
* $Id$
* Portable Audio I/O Library current platform endianness macros
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Phil Burk, Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Configure endianness symbols for the target processor.
Arrange for either the PA_LITTLE_ENDIAN or PA_BIG_ENDIAN preprocessor symbols
to be defined. The one that is defined reflects the endianness of the target
platform and may be used to implement conditional compilation of byte-order
dependent code.
If either PA_LITTLE_ENDIAN or PA_BIG_ENDIAN is defined already, then no attempt
is made to override that setting. This may be useful if you have a better way
of determining the platform's endianness. The autoconf mechanism uses this for
example.
A PA_VALIDATE_ENDIANNESS macro is provided to compare the compile time
and runtime endiannes and raise an assertion if they don't match.
*/
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/* If this is an apple, we need to do detect endianness this way */
#if defined(__APPLE__)
/* we need to do some endian detection that is sensitive to harware arch */
#if defined(__LITTLE_ENDIAN__)
#if !defined( PA_LITTLE_ENDIAN )
#define PA_LITTLE_ENDIAN
#endif
#if defined( PA_BIG_ENDIAN )
#undef PA_BIG_ENDIAN
#endif
#else
#if !defined( PA_BIG_ENDIAN )
#define PA_BIG_ENDIAN
#endif
#if defined( PA_LITTLE_ENDIAN )
#undef PA_LITTLE_ENDIAN
#endif
#endif
#else
/* this is not an apple, so first check the existing defines, and, failing that,
detect well-known architechtures. */
#if defined(PA_LITTLE_ENDIAN) || defined(PA_BIG_ENDIAN)
/* endianness define has been set externally, such as by autoconf */
#if defined(PA_LITTLE_ENDIAN) && defined(PA_BIG_ENDIAN)
#error both PA_LITTLE_ENDIAN and PA_BIG_ENDIAN have been defined externally to pa_endianness.h - only one endianness at a time please
#endif
#endif
/* endianness define has not been set externally */
/* set PA_LITTLE_ENDIAN or PA_BIG_ENDIAN by testing well known platform specific defines */
#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || defined(LITTLE_ENDIAN) || defined(__i386) || defined(_M_IX86)
#define PA_LITTLE_ENDIAN /* win32, assume intel byte order */
#else
#define PA_BIG_ENDIAN
#endif
#if !defined(PA_LITTLE_ENDIAN) && !defined(PA_BIG_ENDIAN)
/*
If the following error is raised, you either need to modify the code above
to automatically determine the endianness from other symbols defined on your
platform, or define either PA_LITTLE_ENDIAN or PA_BIG_ENDIAN externally.
*/
#error pa_endianness.h was unable to automatically determine the endianness of the target platform
#endif
#endif
/* PA_VALIDATE_ENDIANNESS compares the compile time and runtime endianness,
and raises an assertion if they don't match. <assert.h> must be included in
the context in which this macro is used.
*/
#if defined(PA_LITTLE_ENDIAN)
#define PA_VALIDATE_ENDIANNESS \
{ \
const long nativeOne = 1; \
assert( "PortAudio: compile time and runtime endianness don't match" && (((char *)&nativeOne)[0]) == 1 ); \
}
#elif defined(PA_BIG_ENDIAN)
#define PA_VALIDATE_ENDIANNESS \
{ \
const long nativeOne = 1; \
assert( "PortAudio: compile time and runtime endianness don't match" && (((char *)&nativeOne)[0]) == 0 ); \
}
#endif
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_ENDIANNESS_H */

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#ifndef PA_HOSTAPI_H
#define PA_HOSTAPI_H
/*
* $Id$
* Portable Audio I/O Library
* host api representation
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Interface used by pa_front to virtualize functions which operate on
host APIs.
*/
#include "portaudio.h"
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/** **FOR THE USE OF pa_front.c ONLY**
Do NOT use fields in this structure, they my change at any time.
Use functions defined in pa_util.h if you think you need functionality
which can be derived from here.
*/
typedef struct PaUtilPrivatePaFrontHostApiInfo {
unsigned long baseDeviceIndex;
}PaUtilPrivatePaFrontHostApiInfo;
/** The common header for all data structures whose pointers are passed through
the hostApiSpecificStreamInfo field of the PaStreamParameters structure.
Note that in order to keep the public PortAudio interface clean, this structure
is not used explicitly when declaring hostApiSpecificStreamInfo data structures.
However, some code in pa_front depends on the first 3 members being equivalent
with this structure.
@see PaStreamParameters
*/
typedef struct PaUtilHostApiSpecificStreamInfoHeader
{
unsigned long size; /**< size of whole structure including this header */
PaHostApiTypeId hostApiType; /**< host API for which this data is intended */
unsigned long version; /**< structure version */
} PaUtilHostApiSpecificStreamInfoHeader;
/** A structure representing the interface to a host API. Contains both
concrete data and pointers to functions which implement the interface.
*/
typedef struct PaUtilHostApiRepresentation {
PaUtilPrivatePaFrontHostApiInfo privatePaFrontInfo;
/** The host api implementation should populate the info field. In the
case of info.defaultInputDevice and info.defaultOutputDevice the
values stored should be 0 based indices within the host api's own
device index range (0 to deviceCount). These values will be converted
to global device indices by pa_front after PaUtilHostApiInitializer()
returns.
*/
PaHostApiInfo info;
PaDeviceInfo** deviceInfos;
/**
(*Terminate)() is guaranteed to be called with a valid <hostApi>
parameter, which was previously returned from the same implementation's
initializer.
*/
void (*Terminate)( struct PaUtilHostApiRepresentation *hostApi );
/**
The inputParameters and outputParameters pointers should not be saved
as they will not remain valid after OpenStream is called.
The following guarantees are made about parameters to (*OpenStream)():
[NOTE: the following list up to *END PA FRONT VALIDATIONS* should be
kept in sync with the one for ValidateOpenStreamParameters and
Pa_OpenStream in pa_front.c]
PaHostApiRepresentation *hostApi
- is valid for this implementation
PaStream** stream
- is non-null
- at least one of inputParameters & outputParmeters is valid (not NULL)
- if inputParameters & outputParmeters are both valid, that
inputParameters->device & outputParmeters->device both use the same host api
PaDeviceIndex inputParameters->device
- is within range (0 to Pa_CountDevices-1) Or:
- is paUseHostApiSpecificDeviceSpecification and
inputParameters->hostApiSpecificStreamInfo is non-NULL and refers
to a valid host api
int inputParameters->numChannels
- if inputParameters->device is not paUseHostApiSpecificDeviceSpecification, numInputChannels is > 0
- upper bound is NOT validated against device capabilities
PaSampleFormat inputParameters->sampleFormat
- is one of the sample formats defined in portaudio.h
void *inputParameters->hostApiSpecificStreamInfo
- if supplied its hostApi field matches the input device's host Api
PaDeviceIndex outputParmeters->device
- is within range (0 to Pa_CountDevices-1)
int outputParmeters->numChannels
- if inputDevice is valid, numInputChannels is > 0
- upper bound is NOT validated against device capabilities
PaSampleFormat outputParmeters->sampleFormat
- is one of the sample formats defined in portaudio.h
void *outputParmeters->hostApiSpecificStreamInfo
- if supplied its hostApi field matches the output device's host Api
double sampleRate
- is not an 'absurd' rate (less than 1000. or greater than 200000.)
- sampleRate is NOT validated against device capabilities
PaStreamFlags streamFlags
- unused platform neutral flags are zero
- paNeverDropInput is only used for full-duplex callback streams
with variable buffer size (paFramesPerBufferUnspecified)
[*END PA FRONT VALIDATIONS*]
The following validations MUST be performed by (*OpenStream)():
- check that input device can support numInputChannels
- check that input device can support inputSampleFormat, or that
we have the capability to convert from outputSampleFormat to
a native format
- if inputStreamInfo is supplied, validate its contents,
or return an error if no inputStreamInfo is expected
- check that output device can support numOutputChannels
- check that output device can support outputSampleFormat, or that
we have the capability to convert from outputSampleFormat to
a native format
- if outputStreamInfo is supplied, validate its contents,
or return an error if no outputStreamInfo is expected
- if a full duplex stream is requested, check that the combination
of input and output parameters is supported
- check that the device supports sampleRate
- alter sampleRate to a close allowable rate if necessary
- validate inputLatency and outputLatency
- validate any platform specific flags, if flags are supplied they
must be valid.
*/
PaError (*OpenStream)( struct PaUtilHostApiRepresentation *hostApi,
PaStream** stream,
const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters,
double sampleRate,
unsigned long framesPerCallback,
PaStreamFlags streamFlags,
PaStreamCallback *streamCallback,
void *userData );
PaError (*IsFormatSupported)( struct PaUtilHostApiRepresentation *hostApi,
const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters,
double sampleRate );
} PaUtilHostApiRepresentation;
/** Prototype for the initialization function which must be implemented by every
host API.
@see paHostApiInitializers
*/
typedef PaError PaUtilHostApiInitializer( PaUtilHostApiRepresentation**, PaHostApiIndex );
/** paHostApiInitializers is a NULL-terminated array of host API initialization
functions. These functions are called by pa_front to initialize the host APIs
when the client calls Pa_Initialize().
There is a platform specific file which defines paHostApiInitializers for that
platform, pa_win/pa_win_hostapis.c contains the Win32 definitions for example.
*/
extern PaUtilHostApiInitializer *paHostApiInitializers[];
/** The index of the default host API in the paHostApiInitializers array.
There is a platform specific file which defines paDefaultHostApiIndex for that
platform, see pa_win/pa_win_hostapis.c for example.
*/
extern int paDefaultHostApiIndex;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_HOSTAPI_H */

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#ifndef PA_PROCESS_H
#define PA_PROCESS_H
/*
* $Id$
* Portable Audio I/O Library callback buffer processing adapters
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Phil Burk, Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Buffer Processor prototypes. A Buffer Processor performs buffer length
adaption, coordinates sample format conversion, and interleaves/deinterleaves
channels.
<h3>Overview</h3>
The "Buffer Processor" (PaUtilBufferProcessor) manages conversion of audio
data from host buffers to user buffers and back again. Where required, the
buffer processor takes care of converting between host and user sample formats,
interleaving and deinterleaving multichannel buffers, and adapting between host
and user buffers with different lengths. The buffer processor may be used with
full and half duplex streams, for both callback streams and blocking read/write
streams.
One of the important capabilities provided by the buffer processor is
the ability to adapt between user and host buffer sizes of different lengths
with minimum latency. Although this task is relatively easy to perform when
the host buffer size is an integer multiple of the user buffer size, the
problem is more complicated when this is not the case - especially for
full-duplex callback streams. Where necessary the adaption is implemented by
internally buffering some input and/or output data. The buffer adation
algorithm used by the buffer processor was originally implemented by
Stephan Letz for the ASIO version of PortAudio, and is described in his
Callback_adaption_.pdf which is included in the distribution.
The buffer processor performs sample conversion using the functions provided
by pa_converters.c.
The following sections provide an overview of how to use the buffer processor.
Interested readers are advised to consult the host API implementations for
examples of buffer processor usage.
<h4>Initialization, resetting and termination</h4>
When a stream is opened, the buffer processor should be initialized using
PaUtil_InitializeBufferProcessor. This function initializes internal state
and allocates temporary buffers as neccesary according to the supplied
configuration parameters. Some of the parameters correspond to those requested
by the user in their call to Pa_OpenStream(), others reflect the requirements
of the host API implementation - they indicate host buffer sizes, formats,
and the type of buffering which the Host API uses. The buffer processor should
be initialized for callback streams and blocking read/write streams.
Call PaUtil_ResetBufferProcessor to clear any sample data which is present
in the buffer processor before starting to use it (for example when
Pa_StartStream is called).
When the buffer processor is no longer used call
PaUtil_TerminateBufferProcessor.
<h4>Using the buffer processor for a callback stream</h4>
The buffer processor's role in a callback stream is to take host input buffers
process them with the stream callback, and fill host output buffers. For a
full duplex stream, the buffer processor handles input and output simultaneously
due to the requirements of the minimum-latency buffer adation algorithm.
When a host buffer becomes available, the implementation should call
the buffer processor to process the buffer. The buffer processor calls the
stream callback to consume and/or produce audio data as necessary. The buffer
processor will convert sample formats, interleave/deinterleave channels,
and slice or chunk the data to the appropriate buffer lengths according to
the requirements of the stream callback and the host API.
To process a host buffer (or a pair of host buffers for a full-duplex stream)
use the following calling sequence:
-# Call PaUtil_BeginBufferProcessing
-# For a stream which takes input:
- Call PaUtil_SetInputFrameCount with the number of frames in the host input
buffer.
- Call one of the following functions one or more times to tell the
buffer processor about the host input buffer(s): PaUtil_SetInputChannel,
PaUtil_SetInterleavedInputChannels, PaUtil_SetNonInterleavedInputChannel.
Which function you call will depend on whether the host buffer(s) are
interleaved or not.
- If the available host data is split accross two buffers (for example a
data range at the end of a circular buffer and another range at the
beginning of the circular buffer), also call
PaUtil_Set2ndInputFrameCount, PaUtil_Set2ndInputChannel,
PaUtil_Set2ndInterleavedInputChannels,
PaUtil_Set2ndNonInterleavedInputChannel as necessary to tell the buffer
processor about the second buffer.
-# For a stream which generates output:
- Call PaUtil_SetOutputFrameCount with the number of frames in the host
output buffer.
- Call one of the following functions one or more times to tell the
buffer processor about the host output buffer(s): PaUtil_SetOutputChannel,
PaUtil_SetInterleavedOutputChannels, PaUtil_SetNonInterleavedOutputChannel.
Which function you call will depend on whether the host buffer(s) are
interleaved or not.
- If the available host output buffer space is split accross two buffers
(for example a data range at the end of a circular buffer and another
range at the beginning of the circular buffer), call
PaUtil_Set2ndOutputFrameCount, PaUtil_Set2ndOutputChannel,
PaUtil_Set2ndInterleavedOutputChannels,
PaUtil_Set2ndNonInterleavedOutputChannel as necessary to tell the buffer
processor about the second buffer.
-# Call PaUtil_EndBufferProcessing, this function performs the actual data
conversion and processing.
<h4>Using the buffer processor for a blocking read/write stream</h4>
Blocking read/write streams use the buffer processor to convert and copy user
output data to a host buffer, and to convert and copy host input data to
the user's buffer. The buffer processor does not perform any buffer adaption.
When using the buffer processor in a blocking read/write stream the input and
output conversion are performed separately by the PaUtil_CopyInput and
PaUtil_CopyOutput functions.
To copy data from a host input buffer to the buffer(s) which the user supplies
to Pa_ReadStream, use the following calling sequence.
- Repeat the following three steps until the user buffer(s) have been filled
with samples from the host input buffers:
-# Call PaUtil_SetInputFrameCount with the number of frames in the host
input buffer.
-# Call one of the following functions one or more times to tell the
buffer processor about the host input buffer(s): PaUtil_SetInputChannel,
PaUtil_SetInterleavedInputChannels, PaUtil_SetNonInterleavedInputChannel.
Which function you call will depend on whether the host buffer(s) are
interleaved or not.
-# Call PaUtil_CopyInput with the user buffer pointer (or a copy of the
array of buffer pointers for a non-interleaved stream) passed to
Pa_ReadStream, along with the number of frames in the user buffer(s).
Be careful to pass a <i>copy</i> of the user buffer pointers to
PaUtil_CopyInput because PaUtil_CopyInput advances the pointers to
the start of the next region to copy.
- PaUtil_CopyInput will not copy more data than is available in the
host buffer(s), so the above steps need to be repeated until the user
buffer(s) are full.
To copy data to the host output buffer from the user buffers(s) supplied
to Pa_WriteStream use the following calling sequence.
- Repeat the following three steps until all frames from the user buffer(s)
have been copied to the host API:
-# Call PaUtil_SetOutputFrameCount with the number of frames in the host
output buffer.
-# Call one of the following functions one or more times to tell the
buffer processor about the host output buffer(s): PaUtil_SetOutputChannel,
PaUtil_SetInterleavedOutputChannels, PaUtil_SetNonInterleavedOutputChannel.
Which function you call will depend on whether the host buffer(s) are
interleaved or not.
-# Call PaUtil_CopyOutput with the user buffer pointer (or a copy of the
array of buffer pointers for a non-interleaved stream) passed to
Pa_WriteStream, along with the number of frames in the user buffer(s).
Be careful to pass a <i>copy</i> of the user buffer pointers to
PaUtil_CopyOutput because PaUtil_CopyOutput advances the pointers to
the start of the next region to copy.
- PaUtil_CopyOutput will not copy more data than fits in the host buffer(s),
so the above steps need to be repeated until all user data is copied.
*/
#include "portaudio.h"
#include "pa_converters.h"
#include "pa_dither.h"
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/** @brief Mode flag passed to PaUtil_InitializeBufferProcessor indicating the type
of buffering that the host API uses.
The mode used depends on whether the host API or the implementation manages
the buffers, and how these buffers are used (scatter gather, circular buffer).
*/
typedef enum {
/** The host buffer size is a fixed known size. */
paUtilFixedHostBufferSize,
/** The host buffer size may vary, but has a known maximum size. */
paUtilBoundedHostBufferSize,
/** Nothing is known about the host buffer size. */
paUtilUnknownHostBufferSize,
/** The host buffer size varies, and the client does not require the buffer
processor to consume all of the input and fill all of the output buffer. This
is useful when the implementation has access to the host API's circular buffer
and only needs to consume/fill some of it, not necessarily all of it, with each
call to the buffer processor. This is the only mode where
PaUtil_EndBufferProcessing() may not consume the whole buffer.
*/
paUtilVariableHostBufferSizePartialUsageAllowed
}PaUtilHostBufferSizeMode;
/** @brief An auxilliary data structure used internally by the buffer processor
to represent host input and output buffers. */
typedef struct PaUtilChannelDescriptor{
void *data;
unsigned int stride; /**< stride in samples, not bytes */
}PaUtilChannelDescriptor;
/** @brief The main buffer processor data structure.
Allocate one of these, initialize it with PaUtil_InitializeBufferProcessor
and terminate it with PaUtil_TerminateBufferProcessor.
*/
typedef struct {
unsigned long framesPerUserBuffer;
unsigned long framesPerHostBuffer;
PaUtilHostBufferSizeMode hostBufferSizeMode;
int useNonAdaptingProcess;
unsigned long framesPerTempBuffer;
unsigned int inputChannelCount;
unsigned int bytesPerHostInputSample;
unsigned int bytesPerUserInputSample;
int userInputIsInterleaved;
PaUtilConverter *inputConverter;
PaUtilZeroer *inputZeroer;
unsigned int outputChannelCount;
unsigned int bytesPerHostOutputSample;
unsigned int bytesPerUserOutputSample;
int userOutputIsInterleaved;
PaUtilConverter *outputConverter;
PaUtilZeroer *outputZeroer;
unsigned long initialFramesInTempInputBuffer;
unsigned long initialFramesInTempOutputBuffer;
void *tempInputBuffer; /**< used for slips, block adaption, and conversion. */
void **tempInputBufferPtrs; /**< storage for non-interleaved buffer pointers, NULL for interleaved user input */
unsigned long framesInTempInputBuffer; /**< frames remaining in input buffer from previous adaption iteration */
void *tempOutputBuffer; /**< used for slips, block adaption, and conversion. */
void **tempOutputBufferPtrs; /**< storage for non-interleaved buffer pointers, NULL for interleaved user output */
unsigned long framesInTempOutputBuffer; /**< frames remaining in input buffer from previous adaption iteration */
PaStreamCallbackTimeInfo *timeInfo;
PaStreamCallbackFlags callbackStatusFlags;
unsigned long hostInputFrameCount[2];
PaUtilChannelDescriptor *hostInputChannels[2]; /**< pointers to arrays of channel descriptors.
pointers are NULL for half-duplex output processing.
hostInputChannels[i].data is NULL when the caller
calls PaUtil_SetNoInput()
*/
unsigned long hostOutputFrameCount[2];
PaUtilChannelDescriptor *hostOutputChannels[2]; /**< pointers to arrays of channel descriptors.
pointers are NULL for half-duplex input processing.
hostOutputChannels[i].data is NULL when the caller
calls PaUtil_SetNoOutput()
*/
PaUtilTriangularDitherGenerator ditherGenerator;
double samplePeriod;
PaStreamCallback *streamCallback;
void *userData;
} PaUtilBufferProcessor;
/** @name Initialization, termination, resetting and info */
/*@{*/
/** Initialize a buffer processor's representation stored in a
PaUtilBufferProcessor structure. Be sure to call
PaUtil_TerminateBufferProcessor after finishing with a buffer processor.
@param bufferProcessor The buffer processor structure to initialize.
@param inputChannelCount The number of input channels as passed to
Pa_OpenStream or 0 for an output-only stream.
@param userInputSampleFormat Format of user input samples, as passed to
Pa_OpenStream. This parameter is ignored for ouput-only streams.
@param hostInputSampleFormat Format of host input samples. This parameter is
ignored for output-only streams. See note about host buffer interleave below.
@param outputChannelCount The number of output channels as passed to
Pa_OpenStream or 0 for an input-only stream.
@param userOutputSampleFormat Format of user output samples, as passed to
Pa_OpenStream. This parameter is ignored for input-only streams.
@param hostOutputSampleFormat Format of host output samples. This parameter is
ignored for input-only streams. See note about host buffer interleave below.
@param sampleRate Sample rate of the stream. The more accurate this is the
better - it is used for updating time stamps when adapting buffers.
@param streamFlags Stream flags as passed to Pa_OpenStream, this parameter is
used for selecting special sample conversion options such as clipping and
dithering.
@param framesPerUserBuffer Number of frames per user buffer, as requested
by the framesPerBuffer parameter to Pa_OpenStream. This parameter may be
zero to indicate that the user will accept any (and varying) buffer sizes.
@param framesPerHostBuffer Specifies the number of frames per host buffer
for the fixed buffer size mode, and the maximum number of frames
per host buffer for the bounded host buffer size mode. It is ignored for
the other modes.
@param hostBufferSizeMode A mode flag indicating the size variability of
host buffers that will be passed to the buffer processor. See
PaUtilHostBufferSizeMode for further details.
@param streamCallback The user stream callback passed to Pa_OpenStream.
@param userData The user data field passed to Pa_OpenStream.
@note The interleave flag is ignored for host buffer formats. Host
interleave is determined by the use of different SetInput and SetOutput
functions.
@return An error code indicating whether the initialization was successful.
If the error code is not PaNoError, the buffer processor was not initialized
and should not be used.
@see Pa_OpenStream, PaUtilHostBufferSizeMode, PaUtil_TerminateBufferProcessor
*/
PaError PaUtil_InitializeBufferProcessor( PaUtilBufferProcessor* bufferProcessor,
int inputChannelCount, PaSampleFormat userInputSampleFormat,
PaSampleFormat hostInputSampleFormat,
int outputChannelCount, PaSampleFormat userOutputSampleFormat,
PaSampleFormat hostOutputSampleFormat,
double sampleRate,
PaStreamFlags streamFlags,
unsigned long framesPerUserBuffer, /* 0 indicates don't care */
unsigned long framesPerHostBuffer,
PaUtilHostBufferSizeMode hostBufferSizeMode,
PaStreamCallback *streamCallback, void *userData );
/** Terminate a buffer processor's representation. Deallocates any temporary
buffers allocated by PaUtil_InitializeBufferProcessor.
@param bufferProcessor The buffer processor structure to terminate.
@see PaUtil_InitializeBufferProcessor.
*/
void PaUtil_TerminateBufferProcessor( PaUtilBufferProcessor* bufferProcessor );
/** Clear any internally buffered data. If you call
PaUtil_InitializeBufferProcessor in your OpenStream routine, make sure you
call PaUtil_ResetBufferProcessor in your StartStream call.
@param bufferProcessor The buffer processor to reset.
*/
void PaUtil_ResetBufferProcessor( PaUtilBufferProcessor* bufferProcessor );
/** Retrieve the input latency of a buffer processor.
@param bufferProcessor The buffer processor examine.
@return The input latency introduced by the buffer processor, in frames.
@see PaUtil_GetBufferProcessorOutputLatency
*/
unsigned long PaUtil_GetBufferProcessorInputLatency( PaUtilBufferProcessor* bufferProcessor );
/** Retrieve the output latency of a buffer processor.
@param bufferProcessor The buffer processor examine.
@return The output latency introduced by the buffer processor, in frames.
@see PaUtil_GetBufferProcessorInputLatency
*/
unsigned long PaUtil_GetBufferProcessorOutputLatency( PaUtilBufferProcessor* bufferProcessor );
/*@}*/
/** @name Host buffer pointer configuration
Functions to set host input and output buffers, used by both callback streams
and blocking read/write streams.
*/
/*@{*/
/** Set the number of frames in the input host buffer(s) specified by the
PaUtil_Set*InputChannel functions.
@param bufferProcessor The buffer processor.
@param frameCount The number of host input frames. A 0 frameCount indicates to
use the framesPerHostBuffer value passed to PaUtil_InitializeBufferProcessor.
@see PaUtil_SetNoInput, PaUtil_SetInputChannel,
PaUtil_SetInterleavedInputChannels, PaUtil_SetNonInterleavedInputChannel
*/
void PaUtil_SetInputFrameCount( PaUtilBufferProcessor* bufferProcessor,
unsigned long frameCount );
/** Indicate that no input is avalable. This function should be used when
priming the output of a full-duplex stream opened with the
paPrimeOutputBuffersUsingStreamCallback flag. Note that it is not necessary
to call this or any othe PaUtil_Set*Input* functions for ouput-only streams.
@param bufferProcessor The buffer processor.
*/
void PaUtil_SetNoInput( PaUtilBufferProcessor* bufferProcessor );
/** Provide the buffer processor with a pointer to a host input channel.
@param bufferProcessor The buffer processor.
@param channel The channel number.
@param data The buffer.
@param stride The stride from one sample to the next, in samples. For
interleaved host buffers, the stride will usually be the same as the number of
channels in the buffer.
*/
void PaUtil_SetInputChannel( PaUtilBufferProcessor* bufferProcessor,
unsigned int channel, void *data, unsigned int stride );
/** Provide the buffer processor with a pointer to an number of interleaved
host input channels.
@param bufferProcessor The buffer processor.
@param firstChannel The first channel number.
@param data The buffer.
@param channelCount The number of interleaved channels in the buffer. If
channelCount is zero, the number of channels specified to
PaUtil_InitializeBufferProcessor will be used.
*/
void PaUtil_SetInterleavedInputChannels( PaUtilBufferProcessor* bufferProcessor,
unsigned int firstChannel, void *data, unsigned int channelCount );
/** Provide the buffer processor with a pointer to one non-interleaved host
output channel.
@param bufferProcessor The buffer processor.
@param channel The channel number.
@param data The buffer.
*/
void PaUtil_SetNonInterleavedInputChannel( PaUtilBufferProcessor* bufferProcessor,
unsigned int channel, void *data );
/** Use for the second buffer half when the input buffer is split in two halves.
@see PaUtil_SetInputFrameCount
*/
void PaUtil_Set2ndInputFrameCount( PaUtilBufferProcessor* bufferProcessor,
unsigned long frameCount );
/** Use for the second buffer half when the input buffer is split in two halves.
@see PaUtil_SetInputChannel
*/
void PaUtil_Set2ndInputChannel( PaUtilBufferProcessor* bufferProcessor,
unsigned int channel, void *data, unsigned int stride );
/** Use for the second buffer half when the input buffer is split in two halves.
@see PaUtil_SetInterleavedInputChannels
*/
void PaUtil_Set2ndInterleavedInputChannels( PaUtilBufferProcessor* bufferProcessor,
unsigned int firstChannel, void *data, unsigned int channelCount );
/** Use for the second buffer half when the input buffer is split in two halves.
@see PaUtil_SetNonInterleavedInputChannel
*/
void PaUtil_Set2ndNonInterleavedInputChannel( PaUtilBufferProcessor* bufferProcessor,
unsigned int channel, void *data );
/** Set the number of frames in the output host buffer(s) specified by the
PaUtil_Set*OutputChannel functions.
@param bufferProcessor The buffer processor.
@param frameCount The number of host output frames. A 0 frameCount indicates to
use the framesPerHostBuffer value passed to PaUtil_InitializeBufferProcessor.
@see PaUtil_SetOutputChannel, PaUtil_SetInterleavedOutputChannels,
PaUtil_SetNonInterleavedOutputChannel
*/
void PaUtil_SetOutputFrameCount( PaUtilBufferProcessor* bufferProcessor,
unsigned long frameCount );
/** Indicate that the output will be discarded. This function should be used
when implementing the paNeverDropInput mode for full duplex streams.
@param bufferProcessor The buffer processor.
*/
void PaUtil_SetNoOutput( PaUtilBufferProcessor* bufferProcessor );
/** Provide the buffer processor with a pointer to a host output channel.
@param bufferProcessor The buffer processor.
@param channel The channel number.
@param data The buffer.
@param stride The stride from one sample to the next, in samples. For
interleaved host buffers, the stride will usually be the same as the number of
channels in the buffer.
*/
void PaUtil_SetOutputChannel( PaUtilBufferProcessor* bufferProcessor,
unsigned int channel, void *data, unsigned int stride );
/** Provide the buffer processor with a pointer to a number of interleaved
host output channels.
@param bufferProcessor The buffer processor.
@param firstChannel The first channel number.
@param data The buffer.
@param channelCount The number of interleaved channels in the buffer. If
channelCount is zero, the number of channels specified to
PaUtil_InitializeBufferProcessor will be used.
*/
void PaUtil_SetInterleavedOutputChannels( PaUtilBufferProcessor* bufferProcessor,
unsigned int firstChannel, void *data, unsigned int channelCount );
/** Provide the buffer processor with a pointer to one non-interleaved host
output channel.
@param bufferProcessor The buffer processor.
@param channel The channel number.
@param data The buffer.
*/
void PaUtil_SetNonInterleavedOutputChannel( PaUtilBufferProcessor* bufferProcessor,
unsigned int channel, void *data );
/** Use for the second buffer half when the output buffer is split in two halves.
@see PaUtil_SetOutputFrameCount
*/
void PaUtil_Set2ndOutputFrameCount( PaUtilBufferProcessor* bufferProcessor,
unsigned long frameCount );
/** Use for the second buffer half when the output buffer is split in two halves.
@see PaUtil_SetOutputChannel
*/
void PaUtil_Set2ndOutputChannel( PaUtilBufferProcessor* bufferProcessor,
unsigned int channel, void *data, unsigned int stride );
/** Use for the second buffer half when the output buffer is split in two halves.
@see PaUtil_SetInterleavedOutputChannels
*/
void PaUtil_Set2ndInterleavedOutputChannels( PaUtilBufferProcessor* bufferProcessor,
unsigned int firstChannel, void *data, unsigned int channelCount );
/** Use for the second buffer half when the output buffer is split in two halves.
@see PaUtil_SetNonInterleavedOutputChannel
*/
void PaUtil_Set2ndNonInterleavedOutputChannel( PaUtilBufferProcessor* bufferProcessor,
unsigned int channel, void *data );
/*@}*/
/** @name Buffer processing functions for callback streams
*/
/*@{*/
/** Commence processing a host buffer (or a pair of host buffers in the
full-duplex case) for a callback stream.
@param bufferProcessor The buffer processor.
@param timeInfo Timing information for the first sample of the host
buffer(s). This information may be adjusted when buffer adaption is being
performed.
@param callbackStatusFlags Flags indicating whether underruns and overruns
have occurred since the last time the buffer processor was called.
*/
void PaUtil_BeginBufferProcessing( PaUtilBufferProcessor* bufferProcessor,
PaStreamCallbackTimeInfo* timeInfo, PaStreamCallbackFlags callbackStatusFlags );
/** Finish processing a host buffer (or a pair of host buffers in the
full-duplex case) for a callback stream.
@param bufferProcessor The buffer processor.
@param callbackResult On input, indicates a previous callback result, and on
exit, the result of the user stream callback, if it is called.
On entry callbackResult should contain one of { paContinue, paComplete, or
paAbort}. If paComplete is passed, the stream callback will not be called
but any audio that was generated by previous stream callbacks will be copied
to the output buffer(s). You can check whether the buffer processor's internal
buffer is empty by calling PaUtil_IsBufferProcessorOutputEmpty.
If the stream callback is called its result is stored in *callbackResult. If
the stream callback returns paComplete or paAbort, all output buffers will be
full of valid data - some of which may be zeros to acount for data that
wasn't generated by the terminating callback.
@return The number of frames processed. This usually corresponds to the
number of frames specified by the PaUtil_Set*FrameCount functions, exept in
the paUtilVariableHostBufferSizePartialUsageAllowed buffer size mode when a
smaller value may be returned.
*/
unsigned long PaUtil_EndBufferProcessing( PaUtilBufferProcessor* bufferProcessor,
int *callbackResult );
/** Determine whether any callback generated output remains in the bufffer
processor's internal buffers. This method may be used to determine when to
continue calling PaUtil_EndBufferProcessing() after the callback has returned
a callbackResult of paComplete.
@param bufferProcessor The buffer processor.
@return Returns non-zero when callback generated output remains in the internal
buffer and zero (0) when there internal buffer contains no callback generated
data.
*/
int PaUtil_IsBufferProcessorOutputEmpty( PaUtilBufferProcessor* bufferProcessor );
/*@}*/
/** @name Buffer processing functions for blocking read/write streams
*/
/*@{*/
/** Copy samples from host input channels set up by the PaUtil_Set*InputChannels
functions to a user supplied buffer. This function is intended for use with
blocking read/write streams. Copies the minimum of the number of
user frames (specified by the frameCount parameter) and the number of available
host frames (specified in a previous call to SetInputFrameCount()).
@param bufferProcessor The buffer processor.
@param buffer A pointer to the user buffer pointer, or a pointer to a pointer
to an array of user buffer pointers for a non-interleaved stream. It is
important that this parameter points to a copy of the user buffer pointers,
not to the actual user buffer pointers, because this function updates the
pointers before returning.
@param frameCount The number of frames of data in the buffer(s) pointed to by
the buffer parameter.
@return The number of frames copied. The buffer pointer(s) pointed to by the
buffer parameter are advanced to point to the frame(s) following the last one
filled.
*/
unsigned long PaUtil_CopyInput( PaUtilBufferProcessor* bufferProcessor,
void **buffer, unsigned long frameCount );
/* Copy samples from a user supplied buffer to host output channels set up by
the PaUtil_Set*OutputChannels functions. This function is intended for use with
blocking read/write streams. Copies the minimum of the number of
user frames (specified by the frameCount parameter) and the number of
host frames (specified in a previous call to SetOutputFrameCount()).
@param bufferProcessor The buffer processor.
@param buffer A pointer to the user buffer pointer, or a pointer to a pointer
to an array of user buffer pointers for a non-interleaved stream. It is
important that this parameter points to a copy of the user buffer pointers,
not to the actual user buffer pointers, because this function updates the
pointers before returning.
@param frameCount The number of frames of data in the buffer(s) pointed to by
the buffer parameter.
@return The number of frames copied. The buffer pointer(s) pointed to by the
buffer parameter are advanced to point to the frame(s) following the last one
copied.
*/
unsigned long PaUtil_CopyOutput( PaUtilBufferProcessor* bufferProcessor,
const void ** buffer, unsigned long frameCount );
/* Zero samples in host output channels set up by the PaUtil_Set*OutputChannels
functions. This function is useful for flushing streams.
Zeros the minimum of frameCount and the number of host frames specified in a
previous call to SetOutputFrameCount().
@param bufferProcessor The buffer processor.
@param frameCount The maximum number of frames to zero.
@return The number of frames zeroed.
*/
unsigned long PaUtil_ZeroOutput( PaUtilBufferProcessor* bufferProcessor,
unsigned long frameCount );
/*@}*/
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_PROCESS_H */

807
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/*
* $Id$
* Portable Audio I/O Library skeleton implementation
* demonstrates how to use the common functions to implement support
* for a host API
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Skeleton implementation of support for a host API.
@note This file is provided as a starting point for implementing support for
a new host API. IMPLEMENT ME comments are used to indicate functionality
which much be customised for each implementation.
*/
#include <string.h> /* strlen() */
#include "pa_util.h"
#include "pa_allocation.h"
#include "pa_hostapi.h"
#include "pa_stream.h"
#include "pa_cpuload.h"
#include "pa_process.h"
/* prototypes for functions declared in this file */
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
PaError PaSkeleton_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
#ifdef __cplusplus
}
#endif /* __cplusplus */
static void Terminate( struct PaUtilHostApiRepresentation *hostApi );
static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters,
double sampleRate );
static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
PaStream** s,
const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters,
double sampleRate,
unsigned long framesPerBuffer,
PaStreamFlags streamFlags,
PaStreamCallback *streamCallback,
void *userData );
static PaError CloseStream( PaStream* stream );
static PaError StartStream( PaStream *stream );
static PaError StopStream( PaStream *stream );
static PaError AbortStream( PaStream *stream );
static PaError IsStreamStopped( PaStream *s );
static PaError IsStreamActive( PaStream *stream );
static PaTime GetStreamTime( PaStream *stream );
static double GetStreamCpuLoad( PaStream* stream );
static PaError ReadStream( PaStream* stream, void *buffer, unsigned long frames );
static PaError WriteStream( PaStream* stream, const void *buffer, unsigned long frames );
static signed long GetStreamReadAvailable( PaStream* stream );
static signed long GetStreamWriteAvailable( PaStream* stream );
/* IMPLEMENT ME: a macro like the following one should be used for reporting
host errors */
#define PA_SKELETON_SET_LAST_HOST_ERROR( errorCode, errorText ) \
PaUtil_SetLastHostErrorInfo( paInDevelopment, errorCode, errorText )
/* PaSkeletonHostApiRepresentation - host api datastructure specific to this implementation */
typedef struct
{
PaUtilHostApiRepresentation inheritedHostApiRep;
PaUtilStreamInterface callbackStreamInterface;
PaUtilStreamInterface blockingStreamInterface;
PaUtilAllocationGroup *allocations;
/* implementation specific data goes here */
}
PaSkeletonHostApiRepresentation; /* IMPLEMENT ME: rename this */
PaError PaSkeleton_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex hostApiIndex )
{
PaError result = paNoError;
int i, deviceCount;
PaSkeletonHostApiRepresentation *skeletonHostApi;
PaDeviceInfo *deviceInfoArray;
skeletonHostApi = (PaSkeletonHostApiRepresentation*)PaUtil_AllocateMemory( sizeof(PaSkeletonHostApiRepresentation) );
if( !skeletonHostApi )
{
result = paInsufficientMemory;
goto error;
}
skeletonHostApi->allocations = PaUtil_CreateAllocationGroup();
if( !skeletonHostApi->allocations )
{
result = paInsufficientMemory;
goto error;
}
*hostApi = &skeletonHostApi->inheritedHostApiRep;
(*hostApi)->info.structVersion = 1;
(*hostApi)->info.type = paInDevelopment; /* IMPLEMENT ME: change to correct type id */
(*hostApi)->info.name = "skeleton implementation"; /* IMPLEMENT ME: change to correct name */
(*hostApi)->info.defaultInputDevice = paNoDevice; /* IMPLEMENT ME */
(*hostApi)->info.defaultOutputDevice = paNoDevice; /* IMPLEMENT ME */
(*hostApi)->info.deviceCount = 0;
deviceCount = 0; /* IMPLEMENT ME */
if( deviceCount > 0 )
{
(*hostApi)->deviceInfos = (PaDeviceInfo**)PaUtil_GroupAllocateMemory(
skeletonHostApi->allocations, sizeof(PaDeviceInfo*) * deviceCount );
if( !(*hostApi)->deviceInfos )
{
result = paInsufficientMemory;
goto error;
}
/* allocate all device info structs in a contiguous block */
deviceInfoArray = (PaDeviceInfo*)PaUtil_GroupAllocateMemory(
skeletonHostApi->allocations, sizeof(PaDeviceInfo) * deviceCount );
if( !deviceInfoArray )
{
result = paInsufficientMemory;
goto error;
}
for( i=0; i < deviceCount; ++i )
{
PaDeviceInfo *deviceInfo = &deviceInfoArray[i];
deviceInfo->structVersion = 2;
deviceInfo->hostApi = hostApiIndex;
deviceInfo->name = 0; /* IMPLEMENT ME: allocate block and copy name eg:
deviceName = (char*)PaUtil_GroupAllocateMemory( skeletonHostApi->allocations, strlen(srcName) + 1 );
if( !deviceName )
{
result = paInsufficientMemory;
goto error;
}
strcpy( deviceName, srcName );
deviceInfo->name = deviceName;
*/
deviceInfo->maxInputChannels = 0; /* IMPLEMENT ME */
deviceInfo->maxOutputChannels = 0; /* IMPLEMENT ME */
deviceInfo->defaultLowInputLatency = 0.; /* IMPLEMENT ME */
deviceInfo->defaultLowOutputLatency = 0.; /* IMPLEMENT ME */
deviceInfo->defaultHighInputLatency = 0.; /* IMPLEMENT ME */
deviceInfo->defaultHighOutputLatency = 0.; /* IMPLEMENT ME */
deviceInfo->defaultSampleRate = 0.; /* IMPLEMENT ME */
(*hostApi)->deviceInfos[i] = deviceInfo;
++(*hostApi)->info.deviceCount;
}
}
(*hostApi)->Terminate = Terminate;
(*hostApi)->OpenStream = OpenStream;
(*hostApi)->IsFormatSupported = IsFormatSupported;
PaUtil_InitializeStreamInterface( &skeletonHostApi->callbackStreamInterface, CloseStream, StartStream,
StopStream, AbortStream, IsStreamStopped, IsStreamActive,
GetStreamTime, GetStreamCpuLoad,
PaUtil_DummyRead, PaUtil_DummyWrite,
PaUtil_DummyGetReadAvailable, PaUtil_DummyGetWriteAvailable );
PaUtil_InitializeStreamInterface( &skeletonHostApi->blockingStreamInterface, CloseStream, StartStream,
StopStream, AbortStream, IsStreamStopped, IsStreamActive,
GetStreamTime, PaUtil_DummyGetCpuLoad,
ReadStream, WriteStream, GetStreamReadAvailable, GetStreamWriteAvailable );
return result;
error:
if( skeletonHostApi )
{
if( skeletonHostApi->allocations )
{
PaUtil_FreeAllAllocations( skeletonHostApi->allocations );
PaUtil_DestroyAllocationGroup( skeletonHostApi->allocations );
}
PaUtil_FreeMemory( skeletonHostApi );
}
return result;
}
static void Terminate( struct PaUtilHostApiRepresentation *hostApi )
{
PaSkeletonHostApiRepresentation *skeletonHostApi = (PaSkeletonHostApiRepresentation*)hostApi;
/*
IMPLEMENT ME:
- clean up any resources not handled by the allocation group
*/
if( skeletonHostApi->allocations )
{
PaUtil_FreeAllAllocations( skeletonHostApi->allocations );
PaUtil_DestroyAllocationGroup( skeletonHostApi->allocations );
}
PaUtil_FreeMemory( skeletonHostApi );
}
static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters,
double sampleRate )
{
int inputChannelCount, outputChannelCount;
PaSampleFormat inputSampleFormat, outputSampleFormat;
if( inputParameters )
{
inputChannelCount = inputParameters->channelCount;
inputSampleFormat = inputParameters->sampleFormat;
/* all standard sample formats are supported by the buffer adapter,
this implementation doesn't support any custom sample formats */
if( inputSampleFormat & paCustomFormat )
return paSampleFormatNotSupported;
/* unless alternate device specification is supported, reject the use of
paUseHostApiSpecificDeviceSpecification */
if( inputParameters->device == paUseHostApiSpecificDeviceSpecification )
return paInvalidDevice;
/* check that input device can support inputChannelCount */
if( inputChannelCount > hostApi->deviceInfos[ inputParameters->device ]->maxInputChannels )
return paInvalidChannelCount;
/* validate inputStreamInfo */
if( inputParameters->hostApiSpecificStreamInfo )
return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
}
else
{
inputChannelCount = 0;
}
if( outputParameters )
{
outputChannelCount = outputParameters->channelCount;
outputSampleFormat = outputParameters->sampleFormat;
/* all standard sample formats are supported by the buffer adapter,
this implementation doesn't support any custom sample formats */
if( outputSampleFormat & paCustomFormat )
return paSampleFormatNotSupported;
/* unless alternate device specification is supported, reject the use of
paUseHostApiSpecificDeviceSpecification */
if( outputParameters->device == paUseHostApiSpecificDeviceSpecification )
return paInvalidDevice;
/* check that output device can support outputChannelCount */
if( outputChannelCount > hostApi->deviceInfos[ outputParameters->device ]->maxOutputChannels )
return paInvalidChannelCount;
/* validate outputStreamInfo */
if( outputParameters->hostApiSpecificStreamInfo )
return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
}
else
{
outputChannelCount = 0;
}
/*
IMPLEMENT ME:
- if a full duplex stream is requested, check that the combination
of input and output parameters is supported if necessary
- check that the device supports sampleRate
Because the buffer adapter handles conversion between all standard
sample formats, the following checks are only required if paCustomFormat
is implemented, or under some other unusual conditions.
- check that input device can support inputSampleFormat, or that
we have the capability to convert from inputSampleFormat to
a native format
- check that output device can support outputSampleFormat, or that
we have the capability to convert from outputSampleFormat to
a native format
*/
/* suppress unused variable warnings */
(void) sampleRate;
return paFormatIsSupported;
}
/* PaSkeletonStream - a stream data structure specifically for this implementation */
typedef struct PaSkeletonStream
{ /* IMPLEMENT ME: rename this */
PaUtilStreamRepresentation streamRepresentation;
PaUtilCpuLoadMeasurer cpuLoadMeasurer;
PaUtilBufferProcessor bufferProcessor;
/* IMPLEMENT ME:
- implementation specific data goes here
*/
unsigned long framesPerHostCallback; /* just an example */
}
PaSkeletonStream;
/* see pa_hostapi.h for a list of validity guarantees made about OpenStream parameters */
static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
PaStream** s,
const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters,
double sampleRate,
unsigned long framesPerBuffer,
PaStreamFlags streamFlags,
PaStreamCallback *streamCallback,
void *userData )
{
PaError result = paNoError;
PaSkeletonHostApiRepresentation *skeletonHostApi = (PaSkeletonHostApiRepresentation*)hostApi;
PaSkeletonStream *stream = 0;
unsigned long framesPerHostBuffer = framesPerBuffer; /* these may not be equivalent for all implementations */
int inputChannelCount, outputChannelCount;
PaSampleFormat inputSampleFormat, outputSampleFormat;
PaSampleFormat hostInputSampleFormat, hostOutputSampleFormat;
if( inputParameters )
{
inputChannelCount = inputParameters->channelCount;
inputSampleFormat = inputParameters->sampleFormat;
/* unless alternate device specification is supported, reject the use of
paUseHostApiSpecificDeviceSpecification */
if( inputParameters->device == paUseHostApiSpecificDeviceSpecification )
return paInvalidDevice;
/* check that input device can support inputChannelCount */
if( inputChannelCount > hostApi->deviceInfos[ inputParameters->device ]->maxInputChannels )
return paInvalidChannelCount;
/* validate inputStreamInfo */
if( inputParameters->hostApiSpecificStreamInfo )
return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
/* IMPLEMENT ME - establish which host formats are available */
hostInputSampleFormat =
PaUtil_SelectClosestAvailableFormat( paInt16 /* native formats */, inputSampleFormat );
}
else
{
inputChannelCount = 0;
inputSampleFormat = hostInputSampleFormat = paInt16; /* Surpress 'uninitialised var' warnings. */
}
if( outputParameters )
{
outputChannelCount = outputParameters->channelCount;
outputSampleFormat = outputParameters->sampleFormat;
/* unless alternate device specification is supported, reject the use of
paUseHostApiSpecificDeviceSpecification */
if( outputParameters->device == paUseHostApiSpecificDeviceSpecification )
return paInvalidDevice;
/* check that output device can support inputChannelCount */
if( outputChannelCount > hostApi->deviceInfos[ outputParameters->device ]->maxOutputChannels )
return paInvalidChannelCount;
/* validate outputStreamInfo */
if( outputParameters->hostApiSpecificStreamInfo )
return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
/* IMPLEMENT ME - establish which host formats are available */
hostOutputSampleFormat =
PaUtil_SelectClosestAvailableFormat( paInt16 /* native formats */, outputSampleFormat );
}
else
{
outputChannelCount = 0;
outputSampleFormat = hostOutputSampleFormat = paInt16; /* Surpress 'uninitialized var' warnings. */
}
/*
IMPLEMENT ME:
( the following two checks are taken care of by PaUtil_InitializeBufferProcessor() FIXME - checks needed? )
- check that input device can support inputSampleFormat, or that
we have the capability to convert from outputSampleFormat to
a native format
- check that output device can support outputSampleFormat, or that
we have the capability to convert from outputSampleFormat to
a native format
- if a full duplex stream is requested, check that the combination
of input and output parameters is supported
- check that the device supports sampleRate
- alter sampleRate to a close allowable rate if possible / necessary
- validate suggestedInputLatency and suggestedOutputLatency parameters,
use default values where necessary
*/
/* validate platform specific flags */
if( (streamFlags & paPlatformSpecificFlags) != 0 )
return paInvalidFlag; /* unexpected platform specific flag */
stream = (PaSkeletonStream*)PaUtil_AllocateMemory( sizeof(PaSkeletonStream) );
if( !stream )
{
result = paInsufficientMemory;
goto error;
}
if( streamCallback )
{
PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
&skeletonHostApi->callbackStreamInterface, streamCallback, userData );
}
else
{
PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
&skeletonHostApi->blockingStreamInterface, streamCallback, userData );
}
PaUtil_InitializeCpuLoadMeasurer( &stream->cpuLoadMeasurer, sampleRate );
/* we assume a fixed host buffer size in this example, but the buffer processor
can also support bounded and unknown host buffer sizes by passing
paUtilBoundedHostBufferSize or paUtilUnknownHostBufferSize instead of
paUtilFixedHostBufferSize below. */
result = PaUtil_InitializeBufferProcessor( &stream->bufferProcessor,
inputChannelCount, inputSampleFormat, hostInputSampleFormat,
outputChannelCount, outputSampleFormat, hostOutputSampleFormat,
sampleRate, streamFlags, framesPerBuffer,
framesPerHostBuffer, paUtilFixedHostBufferSize,
streamCallback, userData );
if( result != paNoError )
goto error;
/*
IMPLEMENT ME: initialise the following fields with estimated or actual
values.
*/
stream->streamRepresentation.streamInfo.inputLatency =
PaUtil_GetBufferProcessorInputLatency(&stream->bufferProcessor);
stream->streamRepresentation.streamInfo.outputLatency =
PaUtil_GetBufferProcessorOutputLatency(&stream->bufferProcessor);
stream->streamRepresentation.streamInfo.sampleRate = sampleRate;
/*
IMPLEMENT ME:
- additional stream setup + opening
*/
stream->framesPerHostCallback = framesPerHostBuffer;
*s = (PaStream*)stream;
return result;
error:
if( stream )
PaUtil_FreeMemory( stream );
return result;
}
/*
ExampleHostProcessingLoop() illustrates the kind of processing which may
occur in a host implementation.
*/
static void ExampleHostProcessingLoop( void *inputBuffer, void *outputBuffer, void *userData )
{
PaSkeletonStream *stream = (PaSkeletonStream*)userData;
PaStreamCallbackTimeInfo timeInfo = {0,0,0}; /* IMPLEMENT ME */
int callbackResult;
unsigned long framesProcessed;
PaUtil_BeginCpuLoadMeasurement( &stream->cpuLoadMeasurer );
/*
IMPLEMENT ME:
- generate timing information
- handle buffer slips
*/
/*
If you need to byte swap or shift inputBuffer to convert it into a
portaudio format, do it here.
*/
PaUtil_BeginBufferProcessing( &stream->bufferProcessor, &timeInfo, 0 /* IMPLEMENT ME: pass underflow/overflow flags when necessary */ );
/*
depending on whether the host buffers are interleaved, non-interleaved
or a mixture, you will want to call PaUtil_SetInterleaved*Channels(),
PaUtil_SetNonInterleaved*Channel() or PaUtil_Set*Channel() here.
*/
PaUtil_SetInputFrameCount( &stream->bufferProcessor, 0 /* default to host buffer size */ );
PaUtil_SetInterleavedInputChannels( &stream->bufferProcessor,
0, /* first channel of inputBuffer is channel 0 */
inputBuffer,
0 ); /* 0 - use inputChannelCount passed to init buffer processor */
PaUtil_SetOutputFrameCount( &stream->bufferProcessor, 0 /* default to host buffer size */ );
PaUtil_SetInterleavedOutputChannels( &stream->bufferProcessor,
0, /* first channel of outputBuffer is channel 0 */
outputBuffer,
0 ); /* 0 - use outputChannelCount passed to init buffer processor */
/* you must pass a valid value of callback result to PaUtil_EndBufferProcessing()
in general you would pass paContinue for normal operation, and
paComplete to drain the buffer processor's internal output buffer.
You can check whether the buffer processor's output buffer is empty
using PaUtil_IsBufferProcessorOuputEmpty( bufferProcessor )
*/
callbackResult = paContinue;
framesProcessed = PaUtil_EndBufferProcessing( &stream->bufferProcessor, &callbackResult );
/*
If you need to byte swap or shift outputBuffer to convert it to
host format, do it here.
*/
PaUtil_EndCpuLoadMeasurement( &stream->cpuLoadMeasurer, framesProcessed );
if( callbackResult == paContinue )
{
/* nothing special to do */
}
else if( callbackResult == paAbort )
{
/* IMPLEMENT ME - finish playback immediately */
/* once finished, call the finished callback */
if( stream->streamRepresentation.streamFinishedCallback != 0 )
stream->streamRepresentation.streamFinishedCallback( stream->streamRepresentation.userData );
}
else
{
/* User callback has asked us to stop with paComplete or other non-zero value */
/* IMPLEMENT ME - finish playback once currently queued audio has completed */
/* once finished, call the finished callback */
if( stream->streamRepresentation.streamFinishedCallback != 0 )
stream->streamRepresentation.streamFinishedCallback( stream->streamRepresentation.userData );
}
}
/*
When CloseStream() is called, the multi-api layer ensures that
the stream has already been stopped or aborted.
*/
static PaError CloseStream( PaStream* s )
{
PaError result = paNoError;
PaSkeletonStream *stream = (PaSkeletonStream*)s;
/*
IMPLEMENT ME:
- additional stream closing + cleanup
*/
PaUtil_TerminateBufferProcessor( &stream->bufferProcessor );
PaUtil_TerminateStreamRepresentation( &stream->streamRepresentation );
PaUtil_FreeMemory( stream );
return result;
}
static PaError StartStream( PaStream *s )
{
PaError result = paNoError;
PaSkeletonStream *stream = (PaSkeletonStream*)s;
PaUtil_ResetBufferProcessor( &stream->bufferProcessor );
/* IMPLEMENT ME, see portaudio.h for required behavior */
/* suppress unused function warning. the code in ExampleHostProcessingLoop or
something similar should be implemented to feed samples to and from the
host after StartStream() is called.
*/
(void) ExampleHostProcessingLoop;
return result;
}
static PaError StopStream( PaStream *s )
{
PaError result = paNoError;
PaSkeletonStream *stream = (PaSkeletonStream*)s;
/* suppress unused variable warnings */
(void) stream;
/* IMPLEMENT ME, see portaudio.h for required behavior */
return result;
}
static PaError AbortStream( PaStream *s )
{
PaError result = paNoError;
PaSkeletonStream *stream = (PaSkeletonStream*)s;
/* suppress unused variable warnings */
(void) stream;
/* IMPLEMENT ME, see portaudio.h for required behavior */
return result;
}
static PaError IsStreamStopped( PaStream *s )
{
PaSkeletonStream *stream = (PaSkeletonStream*)s;
/* suppress unused variable warnings */
(void) stream;
/* IMPLEMENT ME, see portaudio.h for required behavior */
return 0;
}
static PaError IsStreamActive( PaStream *s )
{
PaSkeletonStream *stream = (PaSkeletonStream*)s;
/* suppress unused variable warnings */
(void) stream;
/* IMPLEMENT ME, see portaudio.h for required behavior */
return 0;
}
static PaTime GetStreamTime( PaStream *s )
{
PaSkeletonStream *stream = (PaSkeletonStream*)s;
/* suppress unused variable warnings */
(void) stream;
/* IMPLEMENT ME, see portaudio.h for required behavior*/
return 0;
}
static double GetStreamCpuLoad( PaStream* s )
{
PaSkeletonStream *stream = (PaSkeletonStream*)s;
return PaUtil_GetCpuLoad( &stream->cpuLoadMeasurer );
}
/*
As separate stream interfaces are used for blocking and callback
streams, the following functions can be guaranteed to only be called
for blocking streams.
*/
static PaError ReadStream( PaStream* s,
void *buffer,
unsigned long frames )
{
PaSkeletonStream *stream = (PaSkeletonStream*)s;
/* suppress unused variable warnings */
(void) buffer;
(void) frames;
(void) stream;
/* IMPLEMENT ME, see portaudio.h for required behavior*/
return paNoError;
}
static PaError WriteStream( PaStream* s,
const void *buffer,
unsigned long frames )
{
PaSkeletonStream *stream = (PaSkeletonStream*)s;
/* suppress unused variable warnings */
(void) buffer;
(void) frames;
(void) stream;
/* IMPLEMENT ME, see portaudio.h for required behavior*/
return paNoError;
}
static signed long GetStreamReadAvailable( PaStream* s )
{
PaSkeletonStream *stream = (PaSkeletonStream*)s;
/* suppress unused variable warnings */
(void) stream;
/* IMPLEMENT ME, see portaudio.h for required behavior*/
return 0;
}
static signed long GetStreamWriteAvailable( PaStream* s )
{
PaSkeletonStream *stream = (PaSkeletonStream*)s;
/* suppress unused variable warnings */
(void) stream;
/* IMPLEMENT ME, see portaudio.h for required behavior*/
return 0;
}

141
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/*
* $Id$
* Portable Audio I/O Library
*
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 2002 Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Interface used by pa_front to virtualize functions which operate on
streams.
*/
#include "pa_stream.h"
void PaUtil_InitializeStreamInterface( PaUtilStreamInterface *streamInterface,
PaError (*Close)( PaStream* ),
PaError (*Start)( PaStream* ),
PaError (*Stop)( PaStream* ),
PaError (*Abort)( PaStream* ),
PaError (*IsStopped)( PaStream* ),
PaError (*IsActive)( PaStream* ),
PaTime (*GetTime)( PaStream* ),
double (*GetCpuLoad)( PaStream* ),
PaError (*Read)( PaStream*, void *, unsigned long ),
PaError (*Write)( PaStream*, const void *, unsigned long ),
signed long (*GetReadAvailable)( PaStream* ),
signed long (*GetWriteAvailable)( PaStream* ) )
{
streamInterface->Close = Close;
streamInterface->Start = Start;
streamInterface->Stop = Stop;
streamInterface->Abort = Abort;
streamInterface->IsStopped = IsStopped;
streamInterface->IsActive = IsActive;
streamInterface->GetTime = GetTime;
streamInterface->GetCpuLoad = GetCpuLoad;
streamInterface->Read = Read;
streamInterface->Write = Write;
streamInterface->GetReadAvailable = GetReadAvailable;
streamInterface->GetWriteAvailable = GetWriteAvailable;
}
void PaUtil_InitializeStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation,
PaUtilStreamInterface *streamInterface,
PaStreamCallback *streamCallback,
void *userData )
{
streamRepresentation->magic = PA_STREAM_MAGIC;
streamRepresentation->nextOpenStream = 0;
streamRepresentation->streamInterface = streamInterface;
streamRepresentation->streamCallback = streamCallback;
streamRepresentation->streamFinishedCallback = 0;
streamRepresentation->userData = userData;
streamRepresentation->streamInfo.inputLatency = 0.;
streamRepresentation->streamInfo.outputLatency = 0.;
streamRepresentation->streamInfo.sampleRate = 0.;
}
void PaUtil_TerminateStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation )
{
streamRepresentation->magic = 0;
}
PaError PaUtil_DummyRead( PaStream* stream,
void *buffer,
unsigned long frames )
{
(void)stream; /* unused parameter */
(void)buffer; /* unused parameter */
(void)frames; /* unused parameter */
return paCanNotReadFromACallbackStream;
}
PaError PaUtil_DummyWrite( PaStream* stream,
const void *buffer,
unsigned long frames )
{
(void)stream; /* unused parameter */
(void)buffer; /* unused parameter */
(void)frames; /* unused parameter */
return paCanNotWriteToACallbackStream;
}
signed long PaUtil_DummyGetReadAvailable( PaStream* stream )
{
(void)stream; /* unused parameter */
return paCanNotReadFromACallbackStream;
}
signed long PaUtil_DummyGetWriteAvailable( PaStream* stream )
{
(void)stream; /* unused parameter */
return paCanNotWriteToACallbackStream;
}
double PaUtil_DummyGetCpuLoad( PaStream* stream )
{
(void)stream; /* unused parameter */
return 0.0;
}

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#ifndef PA_STREAM_H
#define PA_STREAM_H
/*
* $Id$
* Portable Audio I/O Library
* stream interface
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Interface used by pa_front to virtualize functions which operate on
streams.
*/
#include "portaudio.h"
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
#define PA_STREAM_MAGIC (0x18273645)
/** A structure representing an (abstract) interface to a host API. Contains
pointers to functions which implement the interface.
All PaStreamInterface functions are guaranteed to be called with a non-null,
valid stream parameter.
*/
typedef struct {
PaError (*Close)( PaStream* stream );
PaError (*Start)( PaStream *stream );
PaError (*Stop)( PaStream *stream );
PaError (*Abort)( PaStream *stream );
PaError (*IsStopped)( PaStream *stream );
PaError (*IsActive)( PaStream *stream );
PaTime (*GetTime)( PaStream *stream );
double (*GetCpuLoad)( PaStream* stream );
PaError (*Read)( PaStream* stream, void *buffer, unsigned long frames );
PaError (*Write)( PaStream* stream, const void *buffer, unsigned long frames );
signed long (*GetReadAvailable)( PaStream* stream );
signed long (*GetWriteAvailable)( PaStream* stream );
} PaUtilStreamInterface;
/** Initialize the fields of a PaUtilStreamInterface structure.
*/
void PaUtil_InitializeStreamInterface( PaUtilStreamInterface *streamInterface,
PaError (*Close)( PaStream* ),
PaError (*Start)( PaStream* ),
PaError (*Stop)( PaStream* ),
PaError (*Abort)( PaStream* ),
PaError (*IsStopped)( PaStream* ),
PaError (*IsActive)( PaStream* ),
PaTime (*GetTime)( PaStream* ),
double (*GetCpuLoad)( PaStream* ),
PaError (*Read)( PaStream* stream, void *buffer, unsigned long frames ),
PaError (*Write)( PaStream* stream, const void *buffer, unsigned long frames ),
signed long (*GetReadAvailable)( PaStream* stream ),
signed long (*GetWriteAvailable)( PaStream* stream ) );
/** Dummy Read function for use in interfaces to a callback based streams.
Pass to the Read parameter of PaUtil_InitializeStreamInterface.
@return An error code indicating that the function has no effect
because the stream is a callback stream.
*/
PaError PaUtil_DummyRead( PaStream* stream,
void *buffer,
unsigned long frames );
/** Dummy Write function for use in an interfaces to callback based streams.
Pass to the Write parameter of PaUtil_InitializeStreamInterface.
@return An error code indicating that the function has no effect
because the stream is a callback stream.
*/
PaError PaUtil_DummyWrite( PaStream* stream,
const void *buffer,
unsigned long frames );
/** Dummy GetReadAvailable function for use in interfaces to callback based
streams. Pass to the GetReadAvailable parameter of PaUtil_InitializeStreamInterface.
@return An error code indicating that the function has no effect
because the stream is a callback stream.
*/
signed long PaUtil_DummyGetReadAvailable( PaStream* stream );
/** Dummy GetWriteAvailable function for use in interfaces to callback based
streams. Pass to the GetWriteAvailable parameter of PaUtil_InitializeStreamInterface.
@return An error code indicating that the function has no effect
because the stream is a callback stream.
*/
signed long PaUtil_DummyGetWriteAvailable( PaStream* stream );
/** Dummy GetCpuLoad function for use in an interface to a read/write stream.
Pass to the GetCpuLoad parameter of PaUtil_InitializeStreamInterface.
@return Returns 0.
*/
double PaUtil_DummyGetCpuLoad( PaStream* stream );
/** Non host specific data for a stream. This data is used by pa_front to
forward to the appropriate functions in the streamInterface structure.
*/
typedef struct PaUtilStreamRepresentation {
unsigned long magic; /**< set to PA_STREAM_MAGIC */
struct PaUtilStreamRepresentation *nextOpenStream; /**< field used by multi-api code */
PaUtilStreamInterface *streamInterface;
PaStreamCallback *streamCallback;
PaStreamFinishedCallback *streamFinishedCallback;
void *userData;
PaStreamInfo streamInfo;
} PaUtilStreamRepresentation;
/** Initialize a PaUtilStreamRepresentation structure.
@see PaUtil_InitializeStreamRepresentation
*/
void PaUtil_InitializeStreamRepresentation(
PaUtilStreamRepresentation *streamRepresentation,
PaUtilStreamInterface *streamInterface,
PaStreamCallback *streamCallback,
void *userData );
/** Clean up a PaUtilStreamRepresentation structure previously initialized
by a call to PaUtil_InitializeStreamRepresentation.
@see PaUtil_InitializeStreamRepresentation
*/
void PaUtil_TerminateStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation );
/** Check that the stream pointer is valid.
@return Returns paNoError if the stream pointer appears to be OK, otherwise
returns an error indicating the cause of failure.
*/
PaError PaUtil_ValidateStreamPointer( PaStream *stream );
/** Cast an opaque stream pointer into a pointer to a PaUtilStreamRepresentation.
@see PaUtilStreamRepresentation
*/
#define PA_STREAM_REP( stream )\
((PaUtilStreamRepresentation*) (stream) )
/** Cast an opaque stream pointer into a pointer to a PaUtilStreamInterface.
@see PaUtilStreamRepresentation, PaUtilStreamInterface
*/
#define PA_STREAM_INTERFACE( stream )\
PA_STREAM_REP( (stream) )->streamInterface
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_STREAM_H */

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/*
* $Id$
* Portable Audio I/O Library Trace Facility
* Store trace information in real-time for later printing.
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2000 Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Event trace mechanism for debugging.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "pa_trace.h"
#if PA_TRACE_REALTIME_EVENTS
static char *traceTextArray[PA_MAX_TRACE_RECORDS];
static int traceIntArray[PA_MAX_TRACE_RECORDS];
static int traceIndex = 0;
static int traceBlock = 0;
/*********************************************************************/
void PaUtil_ResetTraceMessages()
{
traceIndex = 0;
}
/*********************************************************************/
void PaUtil_DumpTraceMessages()
{
int i;
int messageCount = (traceIndex < PA_MAX_TRACE_RECORDS) ? traceIndex : PA_MAX_TRACE_RECORDS;
printf("DumpTraceMessages: traceIndex = %d\n", traceIndex );
for( i=0; i<messageCount; i++ )
{
printf("%3d: %s = 0x%08X\n",
i, traceTextArray[i], traceIntArray[i] );
}
PaUtil_ResetTraceMessages();
fflush(stdout);
}
/*********************************************************************/
void PaUtil_AddTraceMessage( const char *msg, int data )
{
if( (traceIndex == PA_MAX_TRACE_RECORDS) && (traceBlock == 0) )
{
traceBlock = 1;
/* PaUtil_DumpTraceMessages(); */
}
else if( traceIndex < PA_MAX_TRACE_RECORDS )
{
traceTextArray[traceIndex] = msg;
traceIntArray[traceIndex] = data;
traceIndex++;
}
}
#endif /* TRACE_REALTIME_EVENTS */

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#ifndef PA_TRACE_H
#define PA_TRACE_H
/*
* $Id$
* Portable Audio I/O Library Trace Facility
* Store trace information in real-time for later printing.
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2000 Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Event trace mechanism for debugging.
Allows data to be written to the buffer at interrupt time and dumped later.
*/
#define PA_TRACE_REALTIME_EVENTS (0) /* Keep log of various real-time events. */
#define PA_MAX_TRACE_RECORDS (2048)
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
#if PA_TRACE_REALTIME_EVENTS
void PaUtil_ResetTraceMessages();
void PaUtil_AddTraceMessage( const char *msg, int data );
void PaUtil_DumpTraceMessages();
#else
#define PaUtil_ResetTraceMessages() /* noop */
#define PaUtil_AddTraceMessage(msg,data) /* noop */
#define PaUtil_DumpTraceMessages() /* noop */
#endif
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_TRACE_H */

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#ifndef PA_TYPES_H
#define PA_TYPES_H
/*
SIZEOF_SHORT, SIZEOF_INT and SIZEOF_LONG are set by the configure script
when it is used. Otherwise we default to the common 32 bit values, if your
platform doesn't use configure, and doesn't use the default values below
you will need to explicitly define these symbols in your make file.
A PA_VALIDATE_SIZES macro is provided to assert that the values set in this
file are correct.
*/
#ifndef SIZEOF_SHORT
#define SIZEOF_SHORT 2
#endif
#ifndef SIZEOF_INT
#define SIZEOF_INT 4
#endif
#ifndef SIZEOF_LONG
#define SIZEOF_LONG 4
#endif
#if SIZEOF_SHORT == 2
typedef signed short PaInt16;
typedef unsigned short PaUint16;
#elif SIZEOF_INT == 2
typedef signed int PaInt16;
typedef unsigned int PaUint16;
#else
#error pa_types.h was unable to determine which type to use for 16bit integers on the target platform
#endif
#if SIZEOF_SHORT == 4
typedef signed short PaInt32;
typedef unsigned short PaUint32;
#elif SIZEOF_INT == 4
typedef signed int PaInt32;
typedef unsigned int PaUint32;
#elif SIZEOF_LONG == 4
typedef signed long PaInt32;
typedef unsigned long PaUint32;
#else
#error pa_types.h was unable to determine which type to use for 32bit integers on the target platform
#endif
/* PA_VALIDATE_TYPE_SIZES compares the size of the integer types at runtime to
ensure that PortAudio was configured correctly, and raises an assertion if
they don't match the expected values. <assert.h> must be included in the
context in which this macro is used.
*/
#define PA_VALIDATE_TYPE_SIZES \
{ \
assert( "PortAudio: type sizes are not correct in pa_types.h" && sizeof( PaUint16 ) == 2 ); \
assert( "PortAudio: type sizes are not correct in pa_types.h" && sizeof( PaInt16 ) == 2 ); \
assert( "PortAudio: type sizes are not correct in pa_types.h" && sizeof( PaUint32 ) == 4 ); \
assert( "PortAudio: type sizes are not correct in pa_types.h" && sizeof( PaInt32 ) == 4 ); \
}
#endif /* PA_TYPES_H */

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#ifndef PA_UTIL_H
#define PA_UTIL_H
/*
* $Id$
* Portable Audio I/O Library implementation utilities header
* common implementation utilities and interfaces
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
@brief Prototypes for utility functions used by PortAudio implementations.
@todo Document and adhere to the alignment guarantees provided by
PaUtil_AllocateMemory().
*/
#include "portaudio.h"
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
struct PaUtilHostApiRepresentation;
/** Retrieve a specific host API representation. This function can be used
by implementations to retrieve a pointer to their representation in
host api specific extension functions which aren't passed a rep pointer
by pa_front.c.
@param hostApi A pointer to a host API represenation pointer. Apon success
this will receive the requested representation pointer.
@param type A valid host API type identifier.
@returns An error code. If the result is PaNoError then a pointer to the
requested host API representation will be stored in *hostApi. If the host API
specified by type is not found, this function returns paHostApiNotFound.
*/
PaError PaUtil_GetHostApiRepresentation( struct PaUtilHostApiRepresentation **hostApi,
PaHostApiTypeId type );
/** Convert a PortAudio device index into a host API specific device index.
@param hostApiDevice Pointer to a device index, on success this will recieve the
converted device index value.
@param device The PortAudio device index to convert.
@param hostApi The host api which the index should be converted for.
@returns On success returns PaNoError and places the converted index in the
hostApiDevice parameter.
*/
PaError PaUtil_DeviceIndexToHostApiDeviceIndex(
PaDeviceIndex *hostApiDevice, PaDeviceIndex device,
struct PaUtilHostApiRepresentation *hostApi );
/** Set the host error information returned by Pa_GetLastHostErrorInfo. This
function and the paUnanticipatedHostError error code should be used as a
last resort. Implementors should use existing PA error codes where possible,
or nominate new ones. Note that at it is always better to use
PaUtil_SetLastHostErrorInfo() and paUnanticipatedHostError than to return an
ambiguous or inaccurate PaError code.
@param hostApiType The host API which encountered the error (ie of the caller)
@param errorCode The error code returned by the native API function.
@param errorText A string describing the error. PaUtil_SetLastHostErrorInfo
makes a copy of the string, so it is not necessary for the pointer to remain
valid after the call to PaUtil_SetLastHostErrorInfo() returns.
*/
void PaUtil_SetLastHostErrorInfo( PaHostApiTypeId hostApiType, long errorCode,
const char *errorText );
/** PA_DEBUG() provides a simple debug message printing facility. The macro
passes it's argument to a printf-like function called PaUtil_DebugPrint()
which prints to stderr and always flushes the stream after printing.
Because preprocessor macros cannot directly accept variable length argument
lists, calls to the macro must include an additional set of parenthesis, eg:
PA_DEBUG(("errorno: %d", 1001 ));
*/
void PaUtil_DebugPrint( const char *format, ... );
#ifdef PA_ENABLE_DEBUG_OUTPUT
#define PA_DEBUG(x) PaUtil_DebugPrint x ;
#else
#define PA_DEBUG(x)
#endif
/* the following functions are implemented in a platform platform specific
.c file
*/
/** Allocate size bytes, guaranteed to be aligned to a FIXME byte boundary */
void *PaUtil_AllocateMemory( long size );
/** Realease block if non-NULL. block may be NULL */
void PaUtil_FreeMemory( void *block );
/** Return the number of currently allocated blocks. This function can be
used for detecting memory leaks.
@note Allocations will only be tracked if PA_TRACK_MEMORY is #defined. If
it isn't, this function will always return 0.
*/
int PaUtil_CountCurrentlyAllocatedBlocks( void );
/** Initialize the clock used by PaUtil_GetTime(). Call this before calling
PaUtil_GetTime.
@see PaUtil_GetTime
*/
void PaUtil_InitializeClock( void );
/** Return the system time in seconds. Used to implement CPU load functions
@see PaUtil_InitializeClock
*/
double PaUtil_GetTime( void );
/* void Pa_Sleep( long msec ); must also be implemented in per-platform .c file */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_UTIL_H */

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ASIO-README.txt
This document contains information to help you compile PortAudio with
ASIO support. If you find any omissions or errors in this document
please notify Ross Bencina <rossb@audiomulch.com>.
Building PortAudio with ASIO support
------------------------------------
To build PortAudio with ASIO support you need to compile and link with
pa_asio.c, and files from the ASIO SDK (see below), along with the common
files from pa_common/ and platform specific files from pa_win/ (for Win32)
or pa_mac/ (for Macintosh).
If you are compiling with a non-Microsoft compiler on windows, also
compile and link with iasiothiscallresolver.cpp (see below for
an explanation).
For some platforms (MingW, possibly Mac), you may simply
be able to type:
./configure --with-host_os=mingw --with-winapi=asio [--with-asiodir=/usr/local/asiosdk2]
make
./configure --with-host_os=darwin --with-winapi=asio [--with-asiodir=/usr/local/asiosdk2]
make
and life will be good.
Obtaining the ASIO SDK
----------------------
In order to build PortAudio with ASIO support, you need to download
the ASIO SDK (version 2.0) from Steinberg. Steinberg makes the ASIO
SDK available to anyone free of charge, however they do not permit its
source code to be distributed.
NOTE: In some cases the ASIO SDK may require patching, see below
for further details.
http://www.steinberg.net/en/ps/support/3rdparty/asio_sdk/
If the above link is broken search Google for:
"download steinberg ASIO SDK"
Building the ASIO SDK on Macintosh
----------------------------------
To build the ASIO SDK on Macintosh you need to compile and link with the
following files from the ASIO SDK:
host/asiodrivers.cpp
host/mac/asioshlib.cpp
host/mac/codefragements.cpp
Building the ASIO SDK on Windows
--------------------------------
To build the ASIO SDK on Windows you need to compile and link with the
following files from the ASIO SDK:
asio_sdk\common\asio.cpp
asio_sdk\host\asiodrivers.cpp
asio_sdk\host\pc\asiolist.cpp
You may also need to adjust your include paths to support inclusion of
header files from the above directories.
The ASIO SDK depends on the following COM API functions:
CoInitialize, CoUninitialize, CoCreateInstance, CLSIDFromString
For compilation with MinGW you will need to link with -lole32, for
Borland link with Import32.lib.
Non-Microsoft (MSVC) Compilers on Windows including Borland and GCC
-------------------------------------------------------------------
Steinberg did not specify a calling convention in the IASIO interface
definition. This causes the Microsoft compiler to use the proprietary
thiscall convention which is not compatible with other compilers, such
as compilers from Borland (BCC and C++Builder) and GNU (gcc).
Steinberg's ASIO SDK will compile but crash on initialization if
compiled with a non-Microsoft compiler on Windows.
PortAudio solves this problem using the iasiothiscallresolver library
which is included in the distribution. When building ASIO support for
non-Microsoft compilers, be sure to compile and link with
iasiothiscallresolver.cpp. Note that iasiothiscallresolver includes
conditional directives which cause it to have no effect if it is
compiled with a Microsoft compiler, or on the Macintosh.
If you use configure and make (see above), this should be handled
automatically for you.
For further information about the IASIO thiscall problem see this page:
http://www.audiomulch.com/~rossb/code/calliasio
Macintosh ASIO SDK Bug Patch
----------------------------
There is a bug in the ASIO SDK that causes the Macintosh version to
often fail during initialization. Below is a patch that you can apply.
In codefragments.cpp replace getFrontProcessDirectory function with
the following one (GetFrontProcess replaced by GetCurrentProcess).
bool CodeFragments::getFrontProcessDirectory(void *specs)
{
FSSpec *fss = (FSSpec *)specs;
ProcessInfoRec pif;
ProcessSerialNumber psn;
memset(&psn,0,(long)sizeof(ProcessSerialNumber));
// if(GetFrontProcess(&psn) == noErr) // wrong !!!
if(GetCurrentProcess(&psn) == noErr) // correct !!!
{
pif.processName = 0;
pif.processAppSpec = fss;
pif.processInfoLength = sizeof(ProcessInfoRec);
if(GetProcessInformation(&psn, &pif) == noErr)
return true;
}
return false;
}
---

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/*
IASIOThiscallResolver.cpp see the comments in iasiothiscallresolver.h for
the top level description - this comment describes the technical details of
the implementation.
The latest version of this file is available from:
http://www.audiomulch.com/~rossb/code/calliasio
please email comments to Ross Bencina <rossb@audiomulch.com>
BACKGROUND
The IASIO interface declared in the Steinberg ASIO 2 SDK declares
functions with no explicit calling convention. This causes MSVC++ to default
to using the thiscall convention, which is a proprietary convention not
implemented by some non-microsoft compilers - notably borland BCC,
C++Builder, and gcc. MSVC++ is the defacto standard compiler used by
Steinberg. As a result of this situation, the ASIO sdk will compile with
any compiler, however attempting to execute the compiled code will cause a
crash due to different default calling conventions on non-Microsoft
compilers.
IASIOThiscallResolver solves the problem by providing an adapter class that
delegates to the IASIO interface using the correct calling convention
(thiscall). Due to the lack of support for thiscall in the Borland and GCC
compilers, the calls have been implemented in assembly language.
A number of macros are defined for thiscall function calls with different
numbers of parameters, with and without return values - it may be possible
to modify the format of these macros to make them work with other inline
assemblers.
THISCALL DEFINITION
A number of definitions of the thiscall calling convention are floating
around the internet. The following definition has been validated against
output from the MSVC++ compiler:
For non-vararg functions, thiscall works as follows: the object (this)
pointer is passed in ECX. All arguments are passed on the stack in
right to left order. The return value is placed in EAX. The callee
clears the passed arguments from the stack.
FINDING FUNCTION POINTERS FROM AN IASIO POINTER
The first field of a COM object is a pointer to its vtble. Thus a pointer
to an object implementing the IASIO interface also points to a pointer to
that object's vtbl. The vtble is a table of function pointers for all of
the virtual functions exposed by the implemented interfaces.
If we consider a variable declared as a pointer to IASO:
IASIO *theAsioDriver
theAsioDriver points to:
object implementing IASIO
{
IASIOvtbl *vtbl
other data
}
in other words, theAsioDriver points to a pointer to an IASIOvtbl
vtbl points to a table of function pointers:
IASIOvtbl ( interface IASIO : public IUnknown )
{
(IUnknown functions)
0 virtual HRESULT STDMETHODCALLTYPE (*QueryInterface)(REFIID riid, void **ppv) = 0;
4 virtual ULONG STDMETHODCALLTYPE (*AddRef)() = 0;
8 virtual ULONG STDMETHODCALLTYPE (*Release)() = 0;
(IASIO functions)
12 virtual ASIOBool (*init)(void *sysHandle) = 0;
16 virtual void (*getDriverName)(char *name) = 0;
20 virtual long (*getDriverVersion)() = 0;
24 virtual void (*getErrorMessage)(char *string) = 0;
28 virtual ASIOError (*start)() = 0;
32 virtual ASIOError (*stop)() = 0;
36 virtual ASIOError (*getChannels)(long *numInputChannels, long *numOutputChannels) = 0;
40 virtual ASIOError (*getLatencies)(long *inputLatency, long *outputLatency) = 0;
44 virtual ASIOError (*getBufferSize)(long *minSize, long *maxSize,
long *preferredSize, long *granularity) = 0;
48 virtual ASIOError (*canSampleRate)(ASIOSampleRate sampleRate) = 0;
52 virtual ASIOError (*getSampleRate)(ASIOSampleRate *sampleRate) = 0;
56 virtual ASIOError (*setSampleRate)(ASIOSampleRate sampleRate) = 0;
60 virtual ASIOError (*getClockSources)(ASIOClockSource *clocks, long *numSources) = 0;
64 virtual ASIOError (*setClockSource)(long reference) = 0;
68 virtual ASIOError (*getSamplePosition)(ASIOSamples *sPos, ASIOTimeStamp *tStamp) = 0;
72 virtual ASIOError (*getChannelInfo)(ASIOChannelInfo *info) = 0;
76 virtual ASIOError (*createBuffers)(ASIOBufferInfo *bufferInfos, long numChannels,
long bufferSize, ASIOCallbacks *callbacks) = 0;
80 virtual ASIOError (*disposeBuffers)() = 0;
84 virtual ASIOError (*controlPanel)() = 0;
88 virtual ASIOError (*future)(long selector,void *opt) = 0;
92 virtual ASIOError (*outputReady)() = 0;
};
The numbers in the left column show the byte offset of each function ptr
from the beginning of the vtbl. These numbers are used in the code below
to select different functions.
In order to find the address of a particular function, theAsioDriver
must first be dereferenced to find the value of the vtbl pointer:
mov eax, theAsioDriver
mov edx, [theAsioDriver] // edx now points to vtbl[0]
Then an offset must be added to the vtbl pointer to select a
particular function, for example vtbl+44 points to the slot containing
a pointer to the getBufferSize function.
Finally vtbl+x must be dereferenced to obtain the value of the function
pointer stored in that address:
call [edx+44] // call the function pointed to by
// the value in the getBufferSize field of the vtbl
SEE ALSO
Martin Fay's OpenASIO DLL at http://www.martinfay.com solves the same
problem by providing a new COM interface which wraps IASIO with an
interface that uses portable calling conventions. OpenASIO must be compiled
with MSVC, and requires that you ship the OpenASIO DLL with your
application.
ACKNOWLEDGEMENTS
Ross Bencina: worked out the thiscall details above, wrote the original
Borland asm macros, and a patch for asio.cpp (which is no longer needed).
Thanks to Martin Fay for introducing me to the issues discussed here,
and to Rene G. Ceballos for assisting with asm dumps from MSVC++.
Antti Silvast: converted the original calliasio to work with gcc and NASM
by implementing the asm code in a separate file.
Fraser Adams: modified the original calliasio containing the Borland inline
asm to add inline asm for gcc i.e. Intel syntax for Borland and AT&T syntax
for gcc. This seems a neater approach for gcc than to have a separate .asm
file and it means that we only need one version of the thiscall patch.
Fraser Adams: rewrote the original calliasio patch in the form of the
IASIOThiscallResolver class in order to avoid modifications to files from
the Steinberg SDK, which may have had potential licence issues.
Andrew Baldwin: contributed fixes for compatibility problems with more
recent versions of the gcc assembler.
*/
// We only need IASIOThiscallResolver at all if we are on Win32. For other
// platforms we simply bypass the IASIOThiscallResolver definition to allow us
// to be safely #include'd whatever the platform to keep client code portable
#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
// If microsoft compiler we can call IASIO directly so IASIOThiscallResolver
// is not used.
#if !defined(_MSC_VER)
#include <new>
#include <assert.h>
// We have a mechanism in iasiothiscallresolver.h to ensure that asio.h is
// #include'd before it in client code, we do NOT want to do this test here.
#define iasiothiscallresolver_sourcefile 1
#include "iasiothiscallresolver.h"
#undef iasiothiscallresolver_sourcefile
// iasiothiscallresolver.h redefines ASIOInit for clients, but we don't want
// this macro defined in this translation unit.
#undef ASIOInit
// theAsioDriver is a global pointer to the current IASIO instance which the
// ASIO SDK uses to perform all actions on the IASIO interface. We substitute
// our own forwarding interface into this pointer.
extern IASIO* theAsioDriver;
// The following macros define the inline assembler for BORLAND first then gcc
#if defined(__BCPLUSPLUS__) || defined(__BORLANDC__)
#define CALL_THISCALL_0( resultName, thisPtr, funcOffset )\
void *this_ = (thisPtr); \
__asm { \
mov ecx, this_ ; \
mov eax, [ecx] ; \
call [eax+funcOffset] ; \
mov resultName, eax ; \
}
#define CALL_VOID_THISCALL_1( thisPtr, funcOffset, param1 )\
void *this_ = (thisPtr); \
__asm { \
mov eax, param1 ; \
push eax ; \
mov ecx, this_ ; \
mov eax, [ecx] ; \
call [eax+funcOffset] ; \
}
#define CALL_THISCALL_1( resultName, thisPtr, funcOffset, param1 )\
void *this_ = (thisPtr); \
__asm { \
mov eax, param1 ; \
push eax ; \
mov ecx, this_ ; \
mov eax, [ecx] ; \
call [eax+funcOffset] ; \
mov resultName, eax ; \
}
#define CALL_THISCALL_1_DOUBLE( resultName, thisPtr, funcOffset, param1 )\
void *this_ = (thisPtr); \
void *doubleParamPtr_ (&param1); \
__asm { \
mov eax, doubleParamPtr_ ; \
push [eax+4] ; \
push [eax] ; \
mov ecx, this_ ; \
mov eax, [ecx] ; \
call [eax+funcOffset] ; \
mov resultName, eax ; \
}
#define CALL_THISCALL_2( resultName, thisPtr, funcOffset, param1, param2 )\
void *this_ = (thisPtr); \
__asm { \
mov eax, param2 ; \
push eax ; \
mov eax, param1 ; \
push eax ; \
mov ecx, this_ ; \
mov eax, [ecx] ; \
call [eax+funcOffset] ; \
mov resultName, eax ; \
}
#define CALL_THISCALL_4( resultName, thisPtr, funcOffset, param1, param2, param3, param4 )\
void *this_ = (thisPtr); \
__asm { \
mov eax, param4 ; \
push eax ; \
mov eax, param3 ; \
push eax ; \
mov eax, param2 ; \
push eax ; \
mov eax, param1 ; \
push eax ; \
mov ecx, this_ ; \
mov eax, [ecx] ; \
call [eax+funcOffset] ; \
mov resultName, eax ; \
}
#elif defined(__GNUC__)
#define CALL_THISCALL_0( resultName, thisPtr, funcOffset ) \
__asm__ __volatile__ ("movl (%1), %%edx\n\t" \
"call *"#funcOffset"(%%edx)\n\t" \
:"=a"(resultName) /* Output Operands */ \
:"c"(thisPtr) /* Input Operands */ \
); \
#define CALL_VOID_THISCALL_1( thisPtr, funcOffset, param1 ) \
__asm__ __volatile__ ("pushl %0\n\t" \
"movl (%1), %%edx\n\t" \
"call *"#funcOffset"(%%edx)\n\t" \
: /* Output Operands */ \
:"r"(param1), /* Input Operands */ \
"c"(thisPtr) \
); \
#define CALL_THISCALL_1( resultName, thisPtr, funcOffset, param1 ) \
__asm__ __volatile__ ("pushl %1\n\t" \
"movl (%2), %%edx\n\t" \
"call *"#funcOffset"(%%edx)\n\t" \
:"=a"(resultName) /* Output Operands */ \
:"r"(param1), /* Input Operands */ \
"c"(thisPtr) \
); \
#define CALL_THISCALL_1_DOUBLE( resultName, thisPtr, funcOffset, param1 ) \
__asm__ __volatile__ ("pushl 4(%1)\n\t" \
"pushl (%1)\n\t" \
"movl (%2), %%edx\n\t" \
"call *"#funcOffset"(%%edx);\n\t" \
:"=a"(resultName) /* Output Operands */ \
:"a"(&param1), /* Input Operands */ \
/* Note: Using "r" above instead of "a" fails */ \
/* when using GCC 3.3.3, and maybe later versions*/\
"c"(thisPtr) \
); \
#define CALL_THISCALL_2( resultName, thisPtr, funcOffset, param1, param2 ) \
__asm__ __volatile__ ("pushl %1\n\t" \
"pushl %2\n\t" \
"movl (%3), %%edx\n\t" \
"call *"#funcOffset"(%%edx)\n\t" \
:"=a"(resultName) /* Output Operands */ \
:"r"(param2), /* Input Operands */ \
"r"(param1), \
"c"(thisPtr) \
); \
#define CALL_THISCALL_4( resultName, thisPtr, funcOffset, param1, param2, param3, param4 )\
__asm__ __volatile__ ("pushl %1\n\t" \
"pushl %2\n\t" \
"pushl %3\n\t" \
"pushl %4\n\t" \
"movl (%5), %%edx\n\t" \
"call *"#funcOffset"(%%edx)\n\t" \
:"=a"(resultName) /* Output Operands */ \
:"r"(param4), /* Input Operands */ \
"r"(param3), \
"r"(param2), \
"r"(param1), \
"c"(thisPtr) \
); \
#endif
// Our static singleton instance.
IASIOThiscallResolver IASIOThiscallResolver::instance;
// Constructor called to initialize static Singleton instance above. Note that
// it is important not to clear that_ incase it has already been set by the call
// to placement new in ASIOInit().
IASIOThiscallResolver::IASIOThiscallResolver()
{
}
// Constructor called from ASIOInit() below
IASIOThiscallResolver::IASIOThiscallResolver(IASIO* that)
: that_( that )
{
}
// Implement IUnknown methods as assert(false). IASIOThiscallResolver is not
// really a COM object, just a wrapper which will work with the ASIO SDK.
// If you wanted to use ASIO without the SDK you might want to implement COM
// aggregation in these methods.
HRESULT STDMETHODCALLTYPE IASIOThiscallResolver::QueryInterface(REFIID riid, void **ppv)
{
(void)riid; // suppress unused variable warning
assert( false ); // this function should never be called by the ASIO SDK.
*ppv = NULL;
return E_NOINTERFACE;
}
ULONG STDMETHODCALLTYPE IASIOThiscallResolver::AddRef()
{
assert( false ); // this function should never be called by the ASIO SDK.
return 1;
}
ULONG STDMETHODCALLTYPE IASIOThiscallResolver::Release()
{
assert( false ); // this function should never be called by the ASIO SDK.
return 1;
}
// Implement the IASIO interface methods by performing the vptr manipulation
// described above then delegating to the real implementation.
ASIOBool IASIOThiscallResolver::init(void *sysHandle)
{
ASIOBool result;
CALL_THISCALL_1( result, that_, 12, sysHandle );
return result;
}
void IASIOThiscallResolver::getDriverName(char *name)
{
CALL_VOID_THISCALL_1( that_, 16, name );
}
long IASIOThiscallResolver::getDriverVersion()
{
ASIOBool result;
CALL_THISCALL_0( result, that_, 20 );
return result;
}
void IASIOThiscallResolver::getErrorMessage(char *string)
{
CALL_VOID_THISCALL_1( that_, 24, string );
}
ASIOError IASIOThiscallResolver::start()
{
ASIOBool result;
CALL_THISCALL_0( result, that_, 28 );
return result;
}
ASIOError IASIOThiscallResolver::stop()
{
ASIOBool result;
CALL_THISCALL_0( result, that_, 32 );
return result;
}
ASIOError IASIOThiscallResolver::getChannels(long *numInputChannels, long *numOutputChannels)
{
ASIOBool result;
CALL_THISCALL_2( result, that_, 36, numInputChannels, numOutputChannels );
return result;
}
ASIOError IASIOThiscallResolver::getLatencies(long *inputLatency, long *outputLatency)
{
ASIOBool result;
CALL_THISCALL_2( result, that_, 40, inputLatency, outputLatency );
return result;
}
ASIOError IASIOThiscallResolver::getBufferSize(long *minSize, long *maxSize,
long *preferredSize, long *granularity)
{
ASIOBool result;
CALL_THISCALL_4( result, that_, 44, minSize, maxSize, preferredSize, granularity );
return result;
}
ASIOError IASIOThiscallResolver::canSampleRate(ASIOSampleRate sampleRate)
{
ASIOBool result;
CALL_THISCALL_1_DOUBLE( result, that_, 48, sampleRate );
return result;
}
ASIOError IASIOThiscallResolver::getSampleRate(ASIOSampleRate *sampleRate)
{
ASIOBool result;
CALL_THISCALL_1( result, that_, 52, sampleRate );
return result;
}
ASIOError IASIOThiscallResolver::setSampleRate(ASIOSampleRate sampleRate)
{
ASIOBool result;
CALL_THISCALL_1_DOUBLE( result, that_, 56, sampleRate );
return result;
}
ASIOError IASIOThiscallResolver::getClockSources(ASIOClockSource *clocks, long *numSources)
{
ASIOBool result;
CALL_THISCALL_2( result, that_, 60, clocks, numSources );
return result;
}
ASIOError IASIOThiscallResolver::setClockSource(long reference)
{
ASIOBool result;
CALL_THISCALL_1( result, that_, 64, reference );
return result;
}
ASIOError IASIOThiscallResolver::getSamplePosition(ASIOSamples *sPos, ASIOTimeStamp *tStamp)
{
ASIOBool result;
CALL_THISCALL_2( result, that_, 68, sPos, tStamp );
return result;
}
ASIOError IASIOThiscallResolver::getChannelInfo(ASIOChannelInfo *info)
{
ASIOBool result;
CALL_THISCALL_1( result, that_, 72, info );
return result;
}
ASIOError IASIOThiscallResolver::createBuffers(ASIOBufferInfo *bufferInfos,
long numChannels, long bufferSize, ASIOCallbacks *callbacks)
{
ASIOBool result;
CALL_THISCALL_4( result, that_, 76, bufferInfos, numChannels, bufferSize, callbacks );
return result;
}
ASIOError IASIOThiscallResolver::disposeBuffers()
{
ASIOBool result;
CALL_THISCALL_0( result, that_, 80 );
return result;
}
ASIOError IASIOThiscallResolver::controlPanel()
{
ASIOBool result;
CALL_THISCALL_0( result, that_, 84 );
return result;
}
ASIOError IASIOThiscallResolver::future(long selector,void *opt)
{
ASIOBool result;
CALL_THISCALL_2( result, that_, 88, selector, opt );
return result;
}
ASIOError IASIOThiscallResolver::outputReady()
{
ASIOBool result;
CALL_THISCALL_0( result, that_, 92 );
return result;
}
// Implement our substitute ASIOInit() method
ASIOError IASIOThiscallResolver::ASIOInit(ASIODriverInfo *info)
{
// To ensure that our instance's vptr is correctly constructed, even if
// ASIOInit is called prior to main(), we explicitly call its constructor
// (potentially over the top of an existing instance). Note that this is
// pretty ugly, and is only safe because IASIOThiscallResolver has no
// destructor and contains no objects with destructors.
new((void*)&instance) IASIOThiscallResolver( theAsioDriver );
// Interpose between ASIO client code and the real driver.
theAsioDriver = &instance;
// Note that we never need to switch theAsioDriver back to point to the
// real driver because theAsioDriver is reset to zero in ASIOExit().
// Delegate to the real ASIOInit
return ::ASIOInit(info);
}
#endif /* !defined(_MSC_VER) */
#endif /* Win32 */

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// ****************************************************************************
// File: IASIOThiscallResolver.h
// Description: The IASIOThiscallResolver class implements the IASIO
// interface and acts as a proxy to the real IASIO interface by
// calling through its vptr table using the thiscall calling
// convention. To put it another way, we interpose
// IASIOThiscallResolver between ASIO SDK code and the driver.
// This is necessary because most non-Microsoft compilers don't
// implement the thiscall calling convention used by IASIO.
//
// iasiothiscallresolver.cpp contains the background of this
// problem plus a technical description of the vptr
// manipulations.
//
// In order to use this mechanism one simply has to add
// iasiothiscallresolver.cpp to the list of files to compile
// and #include <iasiothiscallresolver.h>
//
// Note that this #include must come after the other ASIO SDK
// #includes, for example:
//
// #include <windows.h>
// #include <asiosys.h>
// #include <asio.h>
// #include <asiodrivers.h>
// #include <iasiothiscallresolver.h>
//
// Actually the important thing is to #include
// <iasiothiscallresolver.h> after <asio.h>. We have
// incorporated a test to enforce this ordering.
//
// The code transparently takes care of the interposition by
// using macro substitution to intercept calls to ASIOInit()
// and ASIOExit(). We save the original ASIO global
// "theAsioDriver" in our "that" variable, and then set
// "theAsioDriver" to equal our IASIOThiscallResolver instance.
//
// Whilst this method of resolving the thiscall problem requires
// the addition of #include <iasiothiscallresolver.h> to client
// code it has the advantage that it does not break the terms
// of the ASIO licence by publishing it. We are NOT modifying
// any Steinberg code here, we are merely implementing the IASIO
// interface in the same way that we would need to do if we
// wished to provide an open source ASIO driver.
//
// For compilation with MinGW -lole32 needs to be added to the
// linker options. For BORLAND, linking with Import32.lib is
// sufficient.
//
// The dependencies are with: CoInitialize, CoUninitialize,
// CoCreateInstance, CLSIDFromString - used by asiolist.cpp
// and are required on Windows whether ThiscallResolver is used
// or not.
//
// Searching for the above strings in the root library path
// of your compiler should enable the correct libraries to be
// identified if they aren't immediately obvious.
//
// Note that the current implementation of IASIOThiscallResolver
// is not COM compliant - it does not correctly implement the
// IUnknown interface. Implementing it is not necessary because
// it is not called by parts of the ASIO SDK which call through
// theAsioDriver ptr. The IUnknown methods are implemented as
// assert(false) to ensure that the code fails if they are
// ever called.
// Restrictions: None. Public Domain & Open Source distribute freely
// You may use IASIOThiscallResolver commercially as well as
// privately.
// You the user assume the responsibility for the use of the
// files, binary or text, and there is no guarantee or warranty,
// expressed or implied, including but not limited to the
// implied warranties of merchantability and fitness for a
// particular purpose. You assume all responsibility and agree
// to hold no entity, copyright holder or distributors liable
// for any loss of data or inaccurate representations of data
// as a result of using IASIOThiscallResolver.
// Version: 1.4 Added separate macro CALL_THISCALL_1_DOUBLE from
// Andrew Baldwin, and volatile for whole gcc asm blocks,
// both for compatibility with newer gcc versions. Cleaned up
// Borland asm to use one less register.
// 1.3 Switched to including assert.h for better compatibility.
// Wrapped entire .h and .cpp contents with a check for
// _MSC_VER to provide better compatibility with MS compilers.
// Changed Singleton implementation to use static instance
// instead of freestore allocated instance. Removed ASIOExit
// macro as it is no longer needed.
// 1.2 Removed semicolons from ASIOInit and ASIOExit macros to
// allow them to be embedded in expressions (if statements).
// Cleaned up some comments. Removed combase.c dependency (it
// doesn't compile with BCB anyway) by stubbing IUnknown.
// 1.1 Incorporated comments from Ross Bencina including things
// such as changing name from ThiscallResolver to
// IASIOThiscallResolver, tidying up the constructor, fixing
// a bug in IASIOThiscallResolver::ASIOExit() and improving
// portability through the use of conditional compilation
// 1.0 Initial working version.
// Created: 6/09/2003
// Authors: Fraser Adams
// Ross Bencina
// Rene G. Ceballos
// Martin Fay
// Antti Silvast
// Andrew Baldwin
//
// ****************************************************************************
#ifndef included_iasiothiscallresolver_h
#define included_iasiothiscallresolver_h
// We only need IASIOThiscallResolver at all if we are on Win32. For other
// platforms we simply bypass the IASIOThiscallResolver definition to allow us
// to be safely #include'd whatever the platform to keep client code portable
#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
// If microsoft compiler we can call IASIO directly so IASIOThiscallResolver
// is not used.
#if !defined(_MSC_VER)
// The following is in order to ensure that this header is only included after
// the other ASIO headers (except for the case of iasiothiscallresolver.cpp).
// We need to do this because IASIOThiscallResolver works by eclipsing the
// original definition of ASIOInit() with a macro (see below).
#if !defined(iasiothiscallresolver_sourcefile)
#if !defined(__ASIO_H)
#error iasiothiscallresolver.h must be included AFTER asio.h
#endif
#endif
#include <windows.h>
#include <asiodrvr.h> /* From ASIO SDK */
class IASIOThiscallResolver : public IASIO {
private:
IASIO* that_; // Points to the real IASIO
static IASIOThiscallResolver instance; // Singleton instance
// Constructors - declared private so construction is limited to
// our Singleton instance
IASIOThiscallResolver();
IASIOThiscallResolver(IASIO* that);
public:
// Methods from the IUnknown interface. We don't fully implement IUnknown
// because the ASIO SDK never calls these methods through theAsioDriver ptr.
// These methods are implemented as assert(false).
virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void **ppv);
virtual ULONG STDMETHODCALLTYPE AddRef();
virtual ULONG STDMETHODCALLTYPE Release();
// Methods from the IASIO interface, implemented as forwarning calls to that.
virtual ASIOBool init(void *sysHandle);
virtual void getDriverName(char *name);
virtual long getDriverVersion();
virtual void getErrorMessage(char *string);
virtual ASIOError start();
virtual ASIOError stop();
virtual ASIOError getChannels(long *numInputChannels, long *numOutputChannels);
virtual ASIOError getLatencies(long *inputLatency, long *outputLatency);
virtual ASIOError getBufferSize(long *minSize, long *maxSize, long *preferredSize, long *granularity);
virtual ASIOError canSampleRate(ASIOSampleRate sampleRate);
virtual ASIOError getSampleRate(ASIOSampleRate *sampleRate);
virtual ASIOError setSampleRate(ASIOSampleRate sampleRate);
virtual ASIOError getClockSources(ASIOClockSource *clocks, long *numSources);
virtual ASIOError setClockSource(long reference);
virtual ASIOError getSamplePosition(ASIOSamples *sPos, ASIOTimeStamp *tStamp);
virtual ASIOError getChannelInfo(ASIOChannelInfo *info);
virtual ASIOError createBuffers(ASIOBufferInfo *bufferInfos, long numChannels, long bufferSize, ASIOCallbacks *callbacks);
virtual ASIOError disposeBuffers();
virtual ASIOError controlPanel();
virtual ASIOError future(long selector,void *opt);
virtual ASIOError outputReady();
// Class method, see ASIOInit() macro below.
static ASIOError ASIOInit(ASIODriverInfo *info); // Delegates to ::ASIOInit
};
// Replace calls to ASIOInit with our interposing version.
// This macro enables us to perform thiscall resolution simply by #including
// <iasiothiscallresolver.h> after the asio #includes (this file _must_ be
// included _after_ the asio #includes)
#define ASIOInit(name) IASIOThiscallResolver::ASIOInit((name))
#endif /* !defined(_MSC_VER) */
#endif /* Win32 */
#endif /* included_iasiothiscallresolver_h */

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Notes on status of CoreAudio Implementation of PortAudio
Document Last Updated December 9, 2005
There are currently two implementations of PortAudio for Mac Core Audio.
The original is in pa_mac_core_old.c, and the newer, default implementation
is in pa_mac_core.c.
Only pa_mac_core.c is currently developed and supported as it uses apple's
current core audio technology. To select use the old implementation, replace
pa_mac_core.c with pa_mac_core_old.c (eg. "cp pa_mac_core_auhal.c
pa_mac_core.c"), then run configure and make as usual.
----------------------------------------
Notes on Original implementation:
by Phil Burk and Darren Gibbs
Last updated March 20, 2002
WHAT WORKS
Output with very low latency, <10 msec.
Half duplex input or output.
Full duplex on the same CoreAudio device.
The paFLoat32, paInt16, paInt8, paUInt8 sample formats.
Pa_GetCPULoad()
Pa_StreamTime()
KNOWN BUGS OR LIMITATIONS
We do not yet support simultaneous input and output on different
devices. Note that some CoreAudio devices like the Roland UH30 look
like one device but are actually two different CoreAudio devices. The
Built-In audio is typically one CoreAudio device.
Mono doesn't work.
DEVICE MAPPING
CoreAudio devices can support both input and output. But the sample
rates supported may be different. So we have map one or two PortAudio
device to each CoreAudio device depending on whether it supports
input, output or both.
When we query devices, we first get a list of CoreAudio devices. Then
we scan the list and add a PortAudio device for each CoreAudio device
that supports input. Then we make a scan for output devices.
-------------------------------------------
Notes on Newer/Default AUHAL implementation:
by Bjorn Roche
Last Updated December 9, 2005
Principle of Operation:
This implementation uses AUHAL for audio I/O. To some extent, it also
operates at the "HAL" Layer, though this behavior can be limited by
platform specific flags (see pa_mac_core.h for details). The default
settings should be reasonable: they don't change the SR of the device and
don't cause interruptions if other devices are using the device.
Major Software Elements Used: Apple's HAL AUs provide output SR
conversion transparently, however, only on output, so this
implementation uses AudioConverters to convert the sample rate on input.
A PortAudio ring buffer is used to buffer input when sample rate
conversion is required or when separate audio units are used for duplex
IO. Finally, a PortAudio buffer processor is used to convert formats and
provide additional buffers if needed. Internally, interleaved floating
point data streams are used exclusively - the audio unit converts from
the audio hardware's native format to interleaved float PCM and
PortAudio's Buffer processor is used for conversion to user formats.
Simplex Input: Simplex input uses a single callback. If sample rate
conversion is required, a ring buffer and AudioConverter are used as
well.
Simplex output: Simplex output uses a single callback. No ring buffer or
audio converter is used because AUHAL does its own output SR conversion.
Duplex, one device (no SR conversion): When one device is used, a single
callback is used. This achieves very low latency.
Duplex, separate devices or SR conversion: When SR conversion is
required, data must be buffered before it is converted and data is not
always available at the same times on input and output, so SR conversion
requires the same treatment as separate devices. The input callback
reads data and puts it in the ring buffer. The output callback reads the
data off the ring buffer, into an audio converter and finally to the
buffer processor.
Platform Specific Options:
By using the flags in pa_mac_core.h, the user may specify several options.
For example, the user can specify the sample-rate conversion quality, and
the extent to which PA will attempt to "play nice" and to what extent it
will interrupt other apps to improve performance. For example, if 44100 Hz
sample rate is requested but the device is set at 48000 Hz, PA can either
change the device for optimal playback ("Pro" mode), which may interrupt
other programs playing back audio, or simple use a sample-rate coversion,
which allows for friendlier sharing of the device ("Play Nice" mode).
Known issues:
- Latency: Latency settings are ignored in most cases. Exceptions are when
doing I/O between different devices and as a hint for selecting a realtively
low or relatively high latency in conjunction with
paHostFramesPerBufferUnspecified. Latency settings are always automatically
bound to "safe" values, however, so setting extreme values here should not be
an issue.
- Buffer Size: paHostFramesPerBufferUnspecified and specific host buffer sizes
are supported. paHostFramesPerBufferUnspecified works best in "pro" mode,
where the buffer size and sample rate of the audio device is most likely
to match the expected values.
- Timing info. It reports on stream time, but I'm probably doing something
wrong since patest_sine_time often reports negative latency numbers.
- xrun detection: The only xrun detection performed is when reading
and writing the ring buffer. There is probably more that can be done.
- abort/stop issues: stopping a stream is always a complete operation,
but latency should be low enough to make the lack of a separate abort
unnecessary. Apple clarifies its AudioOutputUnitStop() call here:
http://lists.apple.com/archives/coreaudio-api/2005/Dec/msg00055.html
- blocking interface: Not implemented.
- multichannel: It has been tested successfully on multichannel hardware
from MOTU: traveler and 896HD.
- sample rate conversion quality: By default, SR conversion is the maximum
available. This can be tweaked using flags pa_mac_core.h. Note that the AU
render quyality property is used to set the sample rat conversion quality
as "documented" here:
http://lists.apple.com/archives/coreaudio-api/2004/Jan/msg00141.html
- x86: I haven't tested it on an x86 Mac myself, but users have reported
being able to comiple and run it.

2033
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/* This file contains the implementation
* required for blocking I/O. It is separated from pa_mac_core.c simply to ease
* development. */
#include "pa_mac_core_blocking.h"
#include "pa_mac_core_internal.h"
#include <assert.h>
#ifdef MOSX_USE_NON_ATOMIC_FLAG_BITS
# define OSAtomicOr32( a, b ) ( (*(b)) |= (a) )
# define OSAtomicAnd32( a, b ) ( (*(b)) &= (a) )
#else
# include <libkern/OSAtomic.h>
#endif
/*
* This fnuction determines the size of a particular sample format.
* if the format is not recognized, this returns zero.
*/
static size_t computeSampleSizeFromFormat( PaSampleFormat format )
{
switch( format ) {
case paFloat32: return 4;
case paInt32: return 4;
case paInt24: return 3;
case paInt16: return 2;
case paInt8: case paUInt8: return 1;
default: return 0;
}
}
/*
* Functions for initializing, resetting, and destroying BLIO structures.
*
*/
/* This should be called with the relevant info when initializing a stream for
callback. */
PaError initializeBlioRingBuffers(
PaMacBlio *blio,
PaSampleFormat inputSampleFormat,
PaSampleFormat outputSampleFormat,
size_t framesPerBuffer,
long ringBufferSize,
int inChan,
int outChan )
{
void *data;
int result;
/* zeroify things */
bzero( blio, sizeof( PaMacBlio ) );
/* this is redundant, but the buffers are used to check
if the bufffers have been initialized, so we do it explicitly. */
blio->inputRingBuffer.buffer = NULL;
blio->outputRingBuffer.buffer = NULL;
/* initialize simple data */
blio->inputSampleFormat = inputSampleFormat;
blio->inputSampleSize = computeSampleSizeFromFormat(inputSampleFormat);
blio->outputSampleFormat = outputSampleFormat;
blio->outputSampleSize = computeSampleSizeFromFormat(outputSampleFormat);
blio->framesPerBuffer = framesPerBuffer;
blio->inChan = inChan;
blio->outChan = outChan;
blio->statusFlags = 0;
blio->errors = paNoError;
#ifdef PA_MAC_BLIO_MUTEX
blio->isInputEmpty = false;
blio->isOutputFull = false;
#endif
/* setup ring buffers */
#ifdef PA_MAC_BLIO_MUTEX
result = PaMacCore_SetUnixError( pthread_mutex_init(&(blio->inputMutex),NULL), 0 );
if( result )
goto error;
result = UNIX_ERR( pthread_cond_init( &(blio->inputCond), NULL ) );
if( result )
goto error;
result = UNIX_ERR( pthread_mutex_init(&(blio->outputMutex),NULL) );
if( result )
goto error;
result = UNIX_ERR( pthread_cond_init( &(blio->outputCond), NULL ) );
#endif
if( inChan ) {
data = calloc( ringBufferSize, blio->inputSampleSize );
if( !data )
{
result = paInsufficientMemory;
goto error;
}
assert( 0 == RingBuffer_Init(
&blio->inputRingBuffer,
ringBufferSize*blio->inputSampleSize,
data ) );
}
if( outChan ) {
data = calloc( ringBufferSize, blio->outputSampleSize );
if( !data )
{
result = paInsufficientMemory;
goto error;
}
assert( 0 == RingBuffer_Init(
&blio->outputRingBuffer,
ringBufferSize*blio->outputSampleSize,
data ) );
}
result = resetBlioRingBuffers( blio );
if( result )
goto error;
return 0;
error:
destroyBlioRingBuffers( blio );
return result;
}
#ifdef PA_MAC_BLIO_MUTEX
PaError blioSetIsInputEmpty( PaMacBlio *blio, bool isEmpty )
{
PaError result = paNoError;
if( isEmpty == blio->isInputEmpty )
goto done;
/* we need to update the value. Here's what we do:
* - Lock the mutex, so noone else can write.
* - update the value.
* - unlock.
* - broadcast to all listeners.
*/
result = UNIX_ERR( pthread_mutex_lock( &blio->inputMutex ) );
if( result )
goto done;
blio->isInputEmpty = isEmpty;
result = UNIX_ERR( pthread_mutex_unlock( &blio->inputMutex ) );
if( result )
goto done;
result = UNIX_ERR( pthread_cond_broadcast( &blio->inputCond ) );
if( result )
goto done;
done:
return result;
}
PaError blioSetIsOutputFull( PaMacBlio *blio, bool isFull )
{
PaError result = paNoError;
if( isFull == blio->isOutputFull )
goto done;
/* we need to update the value. Here's what we do:
* - Lock the mutex, so noone else can write.
* - update the value.
* - unlock.
* - broadcast to all listeners.
*/
result = UNIX_ERR( pthread_mutex_lock( &blio->outputMutex ) );
if( result )
goto done;
blio->isOutputFull = isFull;
result = UNIX_ERR( pthread_mutex_unlock( &blio->outputMutex ) );
if( result )
goto done;
result = UNIX_ERR( pthread_cond_broadcast( &blio->outputCond ) );
if( result )
goto done;
done:
return result;
}
#endif
/* This should be called after stopping or aborting the stream, so that on next
start, the buffers will be ready. */
PaError resetBlioRingBuffers( PaMacBlio *blio )
{
#ifdef PA_MAC__BLIO_MUTEX
int result;
#endif
blio->statusFlags = 0;
if( blio->outputRingBuffer.buffer ) {
RingBuffer_Flush( &blio->outputRingBuffer );
bzero( blio->outputRingBuffer.buffer,
blio->outputRingBuffer.bufferSize );
/* Advance buffer */
RingBuffer_AdvanceWriteIndex( &blio->outputRingBuffer, blio->outputRingBuffer.bufferSize );
/* Update isOutputFull. */
#ifdef PA_MAC__BLIO_MUTEX
result = blioSetIsOutputFull( blio, toAdvance == blio->outputRingBuffer.bufferSize );
if( result )
goto error;
#endif
/*
printf( "------%d\n" , blio->framesPerBuffer );
printf( "------%d\n" , blio->outChan );
printf( "------%d\n" , blio->outputSampleSize );
printf( "------%d\n" , blio->framesPerBuffer*blio->outChan*blio->outputSampleSize );
*/
}
if( blio->inputRingBuffer.buffer ) {
RingBuffer_Flush( &blio->inputRingBuffer );
bzero( blio->inputRingBuffer.buffer,
blio->inputRingBuffer.bufferSize );
/* Update isInputEmpty. */
#ifdef PA_MAC__BLIO_MUTEX
result = blioSetIsInputEmpty( blio, true );
if( result )
goto error;
#endif
}
return paNoError;
#ifdef PA_MAC__BLIO_MUTEX
error:
return result;
#endif
}
/*This should be called when you are done with the blio. It can safely be called
multiple times if there are no exceptions. */
PaError destroyBlioRingBuffers( PaMacBlio *blio )
{
PaError result = paNoError;
if( blio->inputRingBuffer.buffer ) {
free( blio->inputRingBuffer.buffer );
#ifdef PA_MAC__BLIO_MUTEX
result = UNIX_ERR( pthread_mutex_destroy( & blio->inputMutex ) );
if( result ) return result;
result = UNIX_ERR( pthread_cond_destroy( & blio->inputCond ) );
if( result ) return result;
#endif
}
blio->inputRingBuffer.buffer = NULL;
if( blio->outputRingBuffer.buffer ) {
free( blio->outputRingBuffer.buffer );
#ifdef PA_MAC__BLIO_MUTEX
result = UNIX_ERR( pthread_mutex_destroy( & blio->outputMutex ) );
if( result ) return result;
result = UNIX_ERR( pthread_cond_destroy( & blio->outputCond ) );
if( result ) return result;
#endif
}
blio->outputRingBuffer.buffer = NULL;
return result;
}
/*
* this is the BlioCallback function. It expects to recieve a PaMacBlio Object
* pointer as userData.
*
*/
int BlioCallback( const void *input, void *output, unsigned long frameCount,
const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData )
{
PaMacBlio *blio = (PaMacBlio*)userData;
long avail;
long toRead;
long toWrite;
/* set flags returned by OS: */
OSAtomicOr32( statusFlags, &blio->statusFlags ) ;
/* --- Handle Input Buffer --- */
if( blio->inChan ) {
avail = RingBuffer_GetWriteAvailable( &blio->inputRingBuffer );
/* check for underflow */
if( avail < frameCount * blio->inputSampleSize * blio->inChan )
OSAtomicOr32( paInputOverflow, &blio->statusFlags );
toRead = MIN( avail, frameCount * blio->inputSampleSize * blio->inChan );
/* copy the data */
/*printf( "reading %d\n", toRead );*/
assert( toRead == RingBuffer_Write( &blio->inputRingBuffer, input, toRead ) );
#ifdef PA_MAC__BLIO_MUTEX
/* Priority inversion. See notes below. */
blioSetIsInputEmpty( blio, false );
#endif
}
/* --- Handle Output Buffer --- */
if( blio->outChan ) {
avail = RingBuffer_GetReadAvailable( &blio->outputRingBuffer );
/* check for underflow */
if( avail < frameCount * blio->outputSampleSize * blio->outChan )
OSAtomicOr32( paOutputUnderflow, &blio->statusFlags );
toWrite = MIN( avail, frameCount * blio->outputSampleSize * blio->outChan );
if( toWrite != frameCount * blio->outputSampleSize * blio->outChan )
bzero( ((char *)output)+toWrite,
frameCount * blio->outputSampleSize * blio->outChan - toWrite );
/* copy the data */
/*printf( "writing %d\n", toWrite );*/
assert( toWrite == RingBuffer_Read( &blio->outputRingBuffer, output, toWrite ) );
#ifdef PA_MAC__BLIO_MUTEX
/* We have a priority inversion here. However, we will only have to
wait if this was true and is now false, which means we've got
some room in the buffer.
Hopefully problems will be minimized. */
blioSetIsOutputFull( blio, false );
#endif
}
return paContinue;
}
PaError ReadStream( PaStream* stream,
void *buffer,
unsigned long frames )
{
PaMacBlio *blio = & ((PaMacCoreStream*)stream) -> blio;
char *cbuf = (char *) buffer;
PaError ret = paNoError;
VVDBUG(("ReadStream()\n"));
while( frames > 0 ) {
long avail;
long toRead;
do {
avail = RingBuffer_GetReadAvailable( &blio->inputRingBuffer );
/*
printf( "Read Buffer is %%%g full: %ld of %ld.\n",
100 * (float)avail / (float) blio->inputRingBuffer.bufferSize,
avail, blio->inputRingBuffer.bufferSize );
*/
if( avail == 0 ) {
#ifdef PA_MAC_BLIO_MUTEX
/**block when empty*/
ret = UNIX_ERR( pthread_mutex_lock( &blio->inputMutex ) );
if( ret )
return ret;
while( blio->isInputEmpty ) {
ret = UNIX_ERR( pthread_cond_wait( &blio->inputCond, &blio->inputMutex ) );
if( ret )
return ret;
}
ret = UNIX_ERR( pthread_mutex_unlock( &blio->inputMutex ) );
if( ret )
return ret;
#else
Pa_Sleep( PA_MAC_BLIO_BUSY_WAIT_SLEEP_INTERVAL );
#endif
}
} while( avail == 0 );
toRead = MIN( avail, frames * blio->inputSampleSize * blio->inChan );
toRead -= toRead % blio->inputSampleSize * blio->inChan ;
RingBuffer_Read( &blio->inputRingBuffer, (void *)cbuf, toRead );
cbuf += toRead;
frames -= toRead / ( blio->inputSampleSize * blio->inChan );
if( toRead == avail ) {
#ifdef PA_MAC_BLIO_MUTEX
/* we just emptied the buffer, so we need to mark it as empty. */
ret = blioSetIsInputEmpty( blio, true );
if( ret )
return ret;
/* of course, in the meantime, the callback may have put some sats
in, so
so check for that, too, to avoid a race condition. */
if( RingBuffer_GetReadAvailable( &blio->inputRingBuffer ) ) {
blioSetIsInputEmpty( blio, false );
if( ret )
return ret;
}
#endif
}
}
/* Report either paNoError or paInputOverflowed. */
/* may also want to report other errors, but this is non-standard. */
ret = blio->statusFlags & paInputOverflow;
/* report underflow only once: */
if( ret ) {
OSAtomicAnd32( ~paInputOverflow, &blio->statusFlags );
ret = paInputOverflowed;
}
return ret;
}
PaError WriteStream( PaStream* stream,
const void *buffer,
unsigned long frames )
{
PaMacBlio *blio = & ((PaMacCoreStream*)stream) -> blio;
char *cbuf = (char *) buffer;
PaError ret = paNoError;
VVDBUG(("WriteStream()\n"));
while( frames > 0 ) {
long avail = 0;
long toWrite;
do {
avail = RingBuffer_GetWriteAvailable( &blio->outputRingBuffer );
/*
printf( "Write Buffer is %%%g full: %ld of %ld.\n",
100 - 100 * (float)avail / (float) blio->outputRingBuffer.bufferSize,
avail, blio->outputRingBuffer.bufferSize );
*/
if( avail == 0 ) {
#ifdef PA_MAC_BLIO_MUTEX
/*block while full*/
ret = UNIX_ERR( pthread_mutex_lock( &blio->outputMutex ) );
if( ret )
return ret;
while( blio->isOutputFull ) {
ret = UNIX_ERR( pthread_cond_wait( &blio->outputCond, &blio->outputMutex ) );
if( ret )
return ret;
}
ret = UNIX_ERR( pthread_mutex_unlock( &blio->outputMutex ) );
if( ret )
return ret;
#else
Pa_Sleep( PA_MAC_BLIO_BUSY_WAIT_SLEEP_INTERVAL );
#endif
}
} while( avail == 0 );
toWrite = MIN( avail, frames * blio->outputSampleSize * blio->outChan );
toWrite -= toWrite % blio->outputSampleSize * blio->outChan ;
RingBuffer_Write( &blio->outputRingBuffer, (void *)cbuf, toWrite );
cbuf += toWrite;
frames -= toWrite / ( blio->outputSampleSize * blio->outChan );
#ifdef PA_MAC_BLIO_MUTEX
if( toWrite == avail ) {
/* we just filled up the buffer, so we need to mark it as filled. */
ret = blioSetIsOutputFull( blio, true );
if( ret )
return ret;
/* of course, in the meantime, we may have emptied the buffer, so
so check for that, too, to avoid a race condition. */
if( RingBuffer_GetWriteAvailable( &blio->outputRingBuffer ) ) {
blioSetIsOutputFull( blio, false );
if( ret )
return ret;
}
}
#endif
}
/* Report either paNoError or paOutputUnderflowed. */
/* may also want to report other errors, but this is non-standard. */
ret = blio->statusFlags & paOutputUnderflow;
/* report underflow only once: */
if( ret ) {
OSAtomicAnd32( ~paOutputUnderflow, &blio->statusFlags );
ret = paOutputUnderflowed;
}
return ret;
}
/*
*
*/
void waitUntilBlioWriteBufferIsFlushed( PaMacBlio *blio )
{
if( blio->outputRingBuffer.buffer ) {
long avail = RingBuffer_GetWriteAvailable( &blio->outputRingBuffer );
while( avail != blio->outputRingBuffer.bufferSize ) {
if( avail == 0 )
Pa_Sleep( PA_MAC_BLIO_BUSY_WAIT_SLEEP_INTERVAL );
avail = RingBuffer_GetWriteAvailable( &blio->outputRingBuffer );
}
}
}
signed long GetStreamReadAvailable( PaStream* stream )
{
PaMacBlio *blio = & ((PaMacCoreStream*)stream) -> blio;
VVDBUG(("GetStreamReadAvailable()\n"));
return RingBuffer_GetReadAvailable( &blio->inputRingBuffer )
/ ( blio->outputSampleSize * blio->outChan );
}
signed long GetStreamWriteAvailable( PaStream* stream )
{
PaMacBlio *blio = & ((PaMacCoreStream*)stream) -> blio;
VVDBUG(("GetStreamWriteAvailable()\n"));
return RingBuffer_GetWriteAvailable( &blio->outputRingBuffer )
/ ( blio->outputSampleSize * blio->outChan );
}

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#ifndef PA_MAC_CORE_BLOCKING_H_
#define PA_MAC_CORE_BLOCKING_H_
#include "ringbuffer.h"
#include "portaudio.h"
#include "pa_mac_core_utilities.h"
/*
* Number of miliseconds to busy wait whil waiting for data in blocking calls.
*/
#define PA_MAC_BLIO_BUSY_WAIT_SLEEP_INTERVAL (5)
/*
* Define exactly one of these blocking methods
* PA_MAC_BLIO_MUTEX is not actively maintained.
*/
#define PA_MAC_BLIO_BUSY_WAIT
/*
#define PA_MAC_BLIO_MUTEX
*/
typedef struct {
RingBuffer inputRingBuffer;
RingBuffer outputRingBuffer;
PaSampleFormat inputSampleFormat;
size_t inputSampleSize;
PaSampleFormat outputSampleFormat;
size_t outputSampleSize;
size_t framesPerBuffer;
int inChan;
int outChan;
//PaStreamCallbackFlags statusFlags;
uint32_t statusFlags;
PaError errors;
/* Here we handle blocking, using condition variables. */
#ifdef PA_MAC_BLIO_MUTEX
volatile bool isInputEmpty;
pthread_mutex_t inputMutex;
pthread_cond_t inputCond;
volatile bool isOutputFull;
pthread_mutex_t outputMutex;
pthread_cond_t outputCond;
#endif
}
PaMacBlio;
/*
* These functions operate on condition and related variables.
*/
PaError initializeBlioRingBuffers(
PaMacBlio *blio,
PaSampleFormat inputSampleFormat,
PaSampleFormat outputSampleFormat,
size_t framesPerBuffer,
long ringBufferSize,
int inChan,
int outChan );
PaError destroyBlioRingBuffers( PaMacBlio *blio );
PaError resetBlioRingBuffers( PaMacBlio *blio );
int BlioCallback(
const void *input, void *output,
unsigned long frameCount,
const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData );
void waitUntilBlioWriteBufferIsFlushed( PaMacBlio *blio );
#endif /*PA_MAC_CORE_BLOCKING_H_*/

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portaudio-v19/src/hostapi/coreaudio/pa_mac_core_internal.h Normal file
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/*
* This is the AUHAL implementation of portaudio.
*
* Written by Bjorn Roche of XO Audio LLC, from PA skeleton code.
* Portions copied from code by Dominic Mazzoni (who wrote a HAL implementation)
*
* Dominic's code was based on code by Phil Burk, Darren Gibbs,
* Gord Peters, Stephane Letz, and Greg Pfiel.
*
* Bjorn Roche and XO Audio LLC reserve no rights to this code.
* The maintainers of PortAudio may redistribute and modify the code and
* licenses as they deam appropriate.
*
* The following people also deserve acknowledgements:
*
* Olivier Tristan for feedback and testing
* Glenn Zelniker and Z-Systems engineering for sponsoring the Blocking I/O
* interface.
*
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
@file pa_mac_core
@author Bjorn Roche
@brief AUHAL implementation of PortAudio
*/
#ifndef PA_MAC_CORE_INTERNAL_H__
#define PA_MAC_CORE_INTERNAL_H__
#include <AudioUnit/AudioUnit.h>
#include <AudioToolbox/AudioToolbox.h>
#include "portaudio.h"
#include "pa_util.h"
#include "pa_hostapi.h"
#include "pa_stream.h"
#include "pa_allocation.h"
#include "pa_cpuload.h"
#include "pa_process.h"
#include "ringbuffer.h"
#include "pa_mac_core_blocking.h"
/* function prototypes */
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
PaError PaMacCore_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#define RING_BUFFER_ADVANCE_DENOMINATOR (4)
PaError ReadStream( PaStream* stream, void *buffer, unsigned long frames );
PaError WriteStream( PaStream* stream, const void *buffer, unsigned long frames );
signed long GetStreamReadAvailable( PaStream* stream );
signed long GetStreamWriteAvailable( PaStream* stream );
/* PaMacAUHAL - host api datastructure specific to this implementation */
typedef struct
{
PaUtilHostApiRepresentation inheritedHostApiRep;
PaUtilStreamInterface callbackStreamInterface;
PaUtilStreamInterface blockingStreamInterface;
PaUtilAllocationGroup *allocations;
/* implementation specific data goes here */
long devCount;
AudioDeviceID *devIds; /*array of all audio devices*/
AudioDeviceID defaultIn;
AudioDeviceID defaultOut;
}
PaMacAUHAL;
/* stream data structure specifically for this implementation */
typedef struct PaMacCoreStream
{
PaUtilStreamRepresentation streamRepresentation;
PaUtilCpuLoadMeasurer cpuLoadMeasurer;
PaUtilBufferProcessor bufferProcessor;
/* implementation specific data goes here */
bool bufferProcessorIsInitialized;
AudioUnit inputUnit;
AudioUnit outputUnit;
AudioDeviceID inputDevice;
AudioDeviceID outputDevice;
size_t userInChan;
size_t userOutChan;
size_t inputFramesPerBuffer;
size_t outputFramesPerBuffer;
PaMacBlio blio;
/* We use this ring buffer when input and out devs are different. */
RingBuffer inputRingBuffer;
/* We may need to do SR conversion on input. */
AudioConverterRef inputSRConverter;
/* We need to preallocate an inputBuffer for reading data. */
AudioBufferList inputAudioBufferList;
AudioTimeStamp startTime;
volatile PaStreamCallbackFlags xrunFlags;
volatile bool isTimeSet;
volatile enum {
STOPPED = 0, /* playback is completely stopped,
and the user has called StopStream(). */
CALLBACK_STOPPED = 1, /* callback has requested stop,
but user has not yet called StopStream(). */
STOPPING = 2, /* The stream is in the process of closing.
This state is just used internally;
externally it is indistinguishable from
ACTIVE.*/
ACTIVE = 3 /* The stream is active and running. */
} state;
double sampleRate;
//these may be different from the stream sample rate due to SR conversion:
double outDeviceSampleRate;
double inDeviceSampleRate;
}
PaMacCoreStream;
#endif /* PA_MAC_CORE_INTERNAL_H__ */

907
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/*
* $Id$
* pa_mac_core.c
* Implementation of PortAudio for Mac OS X CoreAudio
*
* PortAudio Portable Real-Time Audio Library
* Latest Version at: http://www.portaudio.com
*
* Authors: Ross Bencina and Phil Burk
* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <CoreAudio/CoreAudio.h>
#include <AudioToolbox/AudioToolbox.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <assert.h>
#include "portaudio.h"
#include "pa_trace.h"
#include "pa_util.h"
#include "pa_allocation.h"
#include "pa_hostapi.h"
#include "pa_stream.h"
#include "pa_cpuload.h"
#include "pa_process.h"
// ===== constants =====
// ===== structs =====
#pragma mark structs
// PaMacCoreHostApiRepresentation - host api datastructure specific to this implementation
typedef struct PaMacCore_HAR
{
PaUtilHostApiRepresentation inheritedHostApiRep;
PaUtilStreamInterface callbackStreamInterface;
PaUtilStreamInterface blockingStreamInterface;
PaUtilAllocationGroup *allocations;
AudioDeviceID *macCoreDeviceIds;
}
PaMacCoreHostApiRepresentation;
typedef struct PaMacCore_DI
{
PaDeviceInfo inheritedDeviceInfo;
}
PaMacCoreDeviceInfo;
// PaMacCoreStream - a stream data structure specifically for this implementation
typedef struct PaMacCore_S
{
PaUtilStreamRepresentation streamRepresentation;
PaUtilCpuLoadMeasurer cpuLoadMeasurer;
PaUtilBufferProcessor bufferProcessor;
int primeStreamUsingCallback;
AudioDeviceID inputDevice;
AudioDeviceID outputDevice;
// Processing thread management --------------
// HANDLE abortEvent;
// HANDLE processingThread;
// DWORD processingThreadId;
char throttleProcessingThreadOnOverload; // 0 -> don't throtte, non-0 -> throttle
int processingThreadPriority;
int highThreadPriority;
int throttledThreadPriority;
unsigned long throttledSleepMsecs;
int isStopped;
volatile int isActive;
volatile int stopProcessing; // stop thread once existing buffers have been returned
volatile int abortProcessing; // stop thread immediately
// DWORD allBuffersDurationMs; // used to calculate timeouts
}
PaMacCoreStream;
// Data needed by the CoreAudio callback functions
typedef struct PaMacCore_CD
{
PaMacCoreStream *stream;
PaStreamCallback *callback;
void *userData;
PaUtilConverter *inputConverter;
PaUtilConverter *outputConverter;
void *inputBuffer;
void *outputBuffer;
int inputChannelCount;
int outputChannelCount;
PaSampleFormat inputSampleFormat;
PaSampleFormat outputSampleFormat;
PaUtilTriangularDitherGenerator *ditherGenerator;
}
PaMacClientData;
// ===== CoreAudio-PortAudio bridge functions =====
#pragma mark CoreAudio-PortAudio bridge functions
// Maps CoreAudio OSStatus codes to PortAudio PaError codes
static PaError conv_err(OSStatus error)
{
PaError result;
switch (error) {
case kAudioHardwareNoError:
result = paNoError; break;
case kAudioHardwareNotRunningError:
result = paInternalError; break;
case kAudioHardwareUnspecifiedError:
result = paInternalError; break;
case kAudioHardwareUnknownPropertyError:
result = paInternalError; break;
case kAudioHardwareBadPropertySizeError:
result = paInternalError; break;
case kAudioHardwareIllegalOperationError:
result = paInternalError; break;
case kAudioHardwareBadDeviceError:
result = paInvalidDevice; break;
case kAudioHardwareBadStreamError:
result = paBadStreamPtr; break;
case kAudioHardwareUnsupportedOperationError:
result = paInternalError; break;
case kAudioDeviceUnsupportedFormatError:
result = paSampleFormatNotSupported; break;
case kAudioDevicePermissionsError:
result = paDeviceUnavailable; break;
default:
result = paInternalError;
}
return result;
}
/* This function is unused
static AudioStreamBasicDescription *InitializeStreamDescription(const PaStreamParameters *parameters, double sampleRate)
{
struct AudioStreamBasicDescription *streamDescription = PaUtil_AllocateMemory(sizeof(AudioStreamBasicDescription));
streamDescription->mSampleRate = sampleRate;
streamDescription->mFormatID = kAudioFormatLinearPCM;
streamDescription->mFormatFlags = 0;
streamDescription->mFramesPerPacket = 1;
if (parameters->sampleFormat & paNonInterleaved) {
streamDescription->mFormatFlags |= kLinearPCMFormatFlagIsNonInterleaved;
streamDescription->mChannelsPerFrame = 1;
streamDescription->mBytesPerFrame = Pa_GetSampleSize(parameters->sampleFormat);
streamDescription->mBytesPerPacket = Pa_GetSampleSize(parameters->sampleFormat);
}
else {
streamDescription->mChannelsPerFrame = parameters->channelCount;
}
streamDescription->mBytesPerFrame = Pa_GetSampleSize(parameters->sampleFormat) * streamDescription->mChannelsPerFrame;
streamDescription->mBytesPerPacket = streamDescription->mBytesPerFrame * streamDescription->mFramesPerPacket;
if (parameters->sampleFormat & paFloat32) {
streamDescription->mFormatFlags |= kLinearPCMFormatFlagIsFloat;
streamDescription->mBitsPerChannel = 32;
}
else if (parameters->sampleFormat & paInt32) {
streamDescription->mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
streamDescription->mBitsPerChannel = 32;
}
else if (parameters->sampleFormat & paInt24) {
streamDescription->mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
streamDescription->mBitsPerChannel = 24;
}
else if (parameters->sampleFormat & paInt16) {
streamDescription->mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
streamDescription->mBitsPerChannel = 16;
}
else if (parameters->sampleFormat & paInt8) {
streamDescription->mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
streamDescription->mBitsPerChannel = 8;
}
else if (parameters->sampleFormat & paInt32) {
streamDescription->mBitsPerChannel = 8;
}
return streamDescription;
}
*/
static PaStreamCallbackTimeInfo *InitializeTimeInfo(const AudioTimeStamp* now, const AudioTimeStamp* inputTime, const AudioTimeStamp* outputTime)
{
PaStreamCallbackTimeInfo *timeInfo = PaUtil_AllocateMemory(sizeof(PaStreamCallbackTimeInfo));
timeInfo->inputBufferAdcTime = inputTime->mSampleTime;
timeInfo->currentTime = now->mSampleTime;
timeInfo->outputBufferDacTime = outputTime->mSampleTime;
return timeInfo;
}
// ===== support functions =====
#pragma mark support functions
static void CleanUp(PaMacCoreHostApiRepresentation *macCoreHostApi)
{
if( macCoreHostApi->allocations )
{
PaUtil_FreeAllAllocations( macCoreHostApi->allocations );
PaUtil_DestroyAllocationGroup( macCoreHostApi->allocations );
}
PaUtil_FreeMemory( macCoreHostApi );
}
static PaError GetChannelInfo(PaDeviceInfo *deviceInfo, AudioDeviceID macCoreDeviceId, int isInput)
{
UInt32 propSize;
PaError err = paNoError;
UInt32 i;
int numChannels = 0;
AudioBufferList *buflist;
err = conv_err(AudioDeviceGetPropertyInfo(macCoreDeviceId, 0, isInput, kAudioDevicePropertyStreamConfiguration, &propSize, NULL));
buflist = PaUtil_AllocateMemory(propSize);
err = conv_err(AudioDeviceGetProperty(macCoreDeviceId, 0, isInput, kAudioDevicePropertyStreamConfiguration, &propSize, buflist));
if (!err) {
for (i = 0; i < buflist->mNumberBuffers; ++i) {
numChannels += buflist->mBuffers[i].mNumberChannels;
}
if (isInput)
deviceInfo->maxInputChannels = numChannels;
else
deviceInfo->maxOutputChannels = numChannels;
int frameLatency;
propSize = sizeof(UInt32);
err = conv_err(AudioDeviceGetProperty(macCoreDeviceId, 0, isInput, kAudioDevicePropertyLatency, &propSize, &frameLatency));
if (!err) {
double secondLatency = frameLatency / deviceInfo->defaultSampleRate;
if (isInput) {
deviceInfo->defaultLowInputLatency = secondLatency;
deviceInfo->defaultHighInputLatency = secondLatency;
}
else {
deviceInfo->defaultLowOutputLatency = secondLatency;
deviceInfo->defaultHighOutputLatency = secondLatency;
}
}
}
PaUtil_FreeMemory(buflist);
return err;
}
static PaError InitializeDeviceInfo(PaMacCoreDeviceInfo *macCoreDeviceInfo, AudioDeviceID macCoreDeviceId, PaHostApiIndex hostApiIndex )
{
PaDeviceInfo *deviceInfo = &macCoreDeviceInfo->inheritedDeviceInfo;
deviceInfo->structVersion = 2;
deviceInfo->hostApi = hostApiIndex;
PaError err = paNoError;
UInt32 propSize;
err = conv_err(AudioDeviceGetPropertyInfo(macCoreDeviceId, 0, 0, kAudioDevicePropertyDeviceName, &propSize, NULL));
// FIXME: this allocation should be part of the allocations group
char *name = PaUtil_AllocateMemory(propSize);
err = conv_err(AudioDeviceGetProperty(macCoreDeviceId, 0, 0, kAudioDevicePropertyDeviceName, &propSize, name));
if (!err) {
deviceInfo->name = name;
}
Float64 sampleRate;
propSize = sizeof(Float64);
err = conv_err(AudioDeviceGetProperty(macCoreDeviceId, 0, 0, kAudioDevicePropertyNominalSampleRate, &propSize, &sampleRate));
if (!err) {
deviceInfo->defaultSampleRate = sampleRate;
}
// Get channel info
err = GetChannelInfo(deviceInfo, macCoreDeviceId, 1);
err = GetChannelInfo(deviceInfo, macCoreDeviceId, 0);
return err;
}
static PaError InitializeDeviceInfos( PaMacCoreHostApiRepresentation *macCoreHostApi, PaHostApiIndex hostApiIndex )
{
PaError result = paNoError;
PaUtilHostApiRepresentation *hostApi;
PaMacCoreDeviceInfo *deviceInfoArray;
// initialise device counts and default devices under the assumption that there are no devices. These values are incremented below if and when devices are successfully initialized.
hostApi = &macCoreHostApi->inheritedHostApiRep;
hostApi->info.deviceCount = 0;
hostApi->info.defaultInputDevice = paNoDevice;
hostApi->info.defaultOutputDevice = paNoDevice;
UInt32 propsize;
AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices, &propsize, NULL);
int numDevices = propsize / sizeof(AudioDeviceID);
hostApi->info.deviceCount = numDevices;
if (numDevices > 0) {
hostApi->deviceInfos = (PaDeviceInfo**)PaUtil_GroupAllocateMemory(
macCoreHostApi->allocations, sizeof(PaDeviceInfo*) * numDevices );
if( !hostApi->deviceInfos )
{
return paInsufficientMemory;
}
// allocate all device info structs in a contiguous block
deviceInfoArray = (PaMacCoreDeviceInfo*)PaUtil_GroupAllocateMemory(
macCoreHostApi->allocations, sizeof(PaMacCoreDeviceInfo) * numDevices );
if( !deviceInfoArray )
{
return paInsufficientMemory;
}
macCoreHostApi->macCoreDeviceIds = PaUtil_GroupAllocateMemory(macCoreHostApi->allocations, propsize);
AudioHardwareGetProperty(kAudioHardwarePropertyDevices, &propsize, macCoreHostApi->macCoreDeviceIds);
AudioDeviceID defaultInputDevice, defaultOutputDevice;
propsize = sizeof(AudioDeviceID);
AudioHardwareGetProperty(kAudioHardwarePropertyDefaultInputDevice, &propsize, &defaultInputDevice);
AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice, &propsize, &defaultOutputDevice);
UInt32 i;
for (i = 0; i < numDevices; ++i) {
if (macCoreHostApi->macCoreDeviceIds[i] == defaultInputDevice) {
hostApi->info.defaultInputDevice = i;
}
if (macCoreHostApi->macCoreDeviceIds[i] == defaultOutputDevice) {
hostApi->info.defaultOutputDevice = i;
}
InitializeDeviceInfo(&deviceInfoArray[i], macCoreHostApi->macCoreDeviceIds[i], hostApiIndex);
hostApi->deviceInfos[i] = &(deviceInfoArray[i].inheritedDeviceInfo);
}
}
return result;
}
static OSStatus CheckFormat(AudioDeviceID macCoreDeviceId, const PaStreamParameters *parameters, double sampleRate, int isInput)
{
UInt32 propSize = sizeof(AudioStreamBasicDescription);
AudioStreamBasicDescription *streamDescription = PaUtil_AllocateMemory(propSize);
streamDescription->mSampleRate = sampleRate;
streamDescription->mFormatID = 0;
streamDescription->mFormatFlags = 0;
streamDescription->mBytesPerPacket = 0;
streamDescription->mFramesPerPacket = 0;
streamDescription->mBytesPerFrame = 0;
streamDescription->mChannelsPerFrame = 0;
streamDescription->mBitsPerChannel = 0;
streamDescription->mReserved = 0;
OSStatus result = AudioDeviceGetProperty(macCoreDeviceId, 0, isInput, kAudioDevicePropertyStreamFormatSupported, &propSize, streamDescription);
PaUtil_FreeMemory(streamDescription);
return result;
}
static OSStatus CopyInputData(PaMacClientData* destination, const AudioBufferList *source, unsigned long frameCount)
{
int frameSpacing, channelSpacing;
if (destination->inputSampleFormat & paNonInterleaved) {
frameSpacing = 1;
channelSpacing = destination->inputChannelCount;
}
else {
frameSpacing = destination->inputChannelCount;
channelSpacing = 1;
}
AudioBuffer const *inputBuffer = &source->mBuffers[0];
void *coreAudioBuffer = inputBuffer->mData;
void *portAudioBuffer = destination->inputBuffer;
UInt32 i, streamNumber, streamChannel;
for (i = streamNumber = streamChannel = 0; i < destination->inputChannelCount; ++i, ++streamChannel) {
if (streamChannel >= inputBuffer->mNumberChannels) {
++streamNumber;
inputBuffer = &source->mBuffers[streamNumber];
coreAudioBuffer = inputBuffer->mData;
streamChannel = 0;
}
destination->inputConverter(portAudioBuffer, frameSpacing, coreAudioBuffer, inputBuffer->mNumberChannels, frameCount, destination->ditherGenerator);
coreAudioBuffer += sizeof(Float32);
portAudioBuffer += Pa_GetSampleSize(destination->inputSampleFormat) * channelSpacing;
}
return noErr;
}
static OSStatus CopyOutputData(AudioBufferList* destination, PaMacClientData *source, unsigned long frameCount)
{
int frameSpacing, channelSpacing;
if (source->outputSampleFormat & paNonInterleaved) {
frameSpacing = 1;
channelSpacing = source->outputChannelCount;
}
else {
frameSpacing = source->outputChannelCount;
channelSpacing = 1;
}
AudioBuffer *outputBuffer = &destination->mBuffers[0];
void *coreAudioBuffer = outputBuffer->mData;
void *portAudioBuffer = source->outputBuffer;
UInt32 i, streamNumber, streamChannel;
for (i = streamNumber = streamChannel = 0; i < source->outputChannelCount; ++i, ++streamChannel) {
if (streamChannel >= outputBuffer->mNumberChannels) {
++streamNumber;
outputBuffer = &destination->mBuffers[streamNumber];
coreAudioBuffer = outputBuffer->mData;
streamChannel = 0;
}
source->outputConverter(coreAudioBuffer, outputBuffer->mNumberChannels, portAudioBuffer, frameSpacing, frameCount, NULL);
coreAudioBuffer += sizeof(Float32);
portAudioBuffer += Pa_GetSampleSize(source->outputSampleFormat) * channelSpacing;
}
return noErr;
}
static OSStatus AudioIOProc( AudioDeviceID inDevice,
const AudioTimeStamp* inNow,
const AudioBufferList* inInputData,
const AudioTimeStamp* inInputTime,
AudioBufferList* outOutputData,
const AudioTimeStamp* inOutputTime,
void* inClientData)
{
PaMacClientData *clientData = (PaMacClientData *)inClientData;
PaStreamCallbackTimeInfo *timeInfo = InitializeTimeInfo(inNow, inInputTime, inOutputTime);
PaUtil_BeginCpuLoadMeasurement( &clientData->stream->cpuLoadMeasurer );
AudioBuffer *outputBuffer = &outOutputData->mBuffers[0];
unsigned long frameCount = outputBuffer->mDataByteSize / (outputBuffer->mNumberChannels * sizeof(Float32));
if (clientData->inputBuffer) {
CopyInputData(clientData, inInputData, frameCount);
}
PaStreamCallbackResult result = clientData->callback(clientData->inputBuffer, clientData->outputBuffer, frameCount, timeInfo, paNoFlag, clientData->userData);
if (clientData->outputBuffer) {
CopyOutputData(outOutputData, clientData, frameCount);
}
PaUtil_EndCpuLoadMeasurement( &clientData->stream->cpuLoadMeasurer, frameCount );
if (result == paComplete || result == paAbort) {
Pa_StopStream(clientData->stream);
}
PaUtil_FreeMemory( timeInfo );
return noErr;
}
// This is not for input-only streams, this is for streams where the input device is different from the output device
static OSStatus AudioInputProc( AudioDeviceID inDevice,
const AudioTimeStamp* inNow,
const AudioBufferList* inInputData,
const AudioTimeStamp* inInputTime,
AudioBufferList* outOutputData,
const AudioTimeStamp* inOutputTime,
void* inClientData)
{
PaMacClientData *clientData = (PaMacClientData *)inClientData;
PaStreamCallbackTimeInfo *timeInfo = InitializeTimeInfo(inNow, inInputTime, inOutputTime);
PaUtil_BeginCpuLoadMeasurement( &clientData->stream->cpuLoadMeasurer );
AudioBuffer const *inputBuffer = &inInputData->mBuffers[0];
unsigned long frameCount = inputBuffer->mDataByteSize / (inputBuffer->mNumberChannels * sizeof(Float32));
CopyInputData(clientData, inInputData, frameCount);
PaStreamCallbackResult result = clientData->callback(clientData->inputBuffer, clientData->outputBuffer, frameCount, timeInfo, paNoFlag, clientData->userData);
PaUtil_EndCpuLoadMeasurement( &clientData->stream->cpuLoadMeasurer, frameCount );
if( result == paComplete || result == paAbort )
Pa_StopStream(clientData->stream);
PaUtil_FreeMemory( timeInfo );
return noErr;
}
// This is not for output-only streams, this is for streams where the input device is different from the output device
static OSStatus AudioOutputProc( AudioDeviceID inDevice,
const AudioTimeStamp* inNow,
const AudioBufferList* inInputData,
const AudioTimeStamp* inInputTime,
AudioBufferList* outOutputData,
const AudioTimeStamp* inOutputTime,
void* inClientData)
{
PaMacClientData *clientData = (PaMacClientData *)inClientData;
//PaStreamCallbackTimeInfo *timeInfo = InitializeTimeInfo(inNow, inInputTime, inOutputTime);
PaUtil_BeginCpuLoadMeasurement( &clientData->stream->cpuLoadMeasurer );
AudioBuffer *outputBuffer = &outOutputData->mBuffers[0];
unsigned long frameCount = outputBuffer->mDataByteSize / (outputBuffer->mNumberChannels * sizeof(Float32));
//clientData->callback(NULL, clientData->outputBuffer, frameCount, timeInfo, paNoFlag, clientData->userData);
CopyOutputData(outOutputData, clientData, frameCount);
PaUtil_EndCpuLoadMeasurement( &clientData->stream->cpuLoadMeasurer, frameCount );
return noErr;
}
static PaError SetSampleRate(AudioDeviceID device, double sampleRate, int isInput)
{
PaError result = paNoError;
double actualSampleRate;
UInt32 propSize = sizeof(double);
result = conv_err(AudioDeviceSetProperty(device, NULL, 0, isInput, kAudioDevicePropertyNominalSampleRate, propSize, &sampleRate));
result = conv_err(AudioDeviceGetProperty(device, 0, isInput, kAudioDevicePropertyNominalSampleRate, &propSize, &actualSampleRate));
if (result == paNoError && actualSampleRate != sampleRate) {
result = paInvalidSampleRate;
}
return result;
}
static PaError SetFramesPerBuffer(AudioDeviceID device, unsigned long framesPerBuffer, int isInput)
{
PaError result = paNoError;
UInt32 preferredFramesPerBuffer = framesPerBuffer;
// while (preferredFramesPerBuffer > UINT32_MAX) {
// preferredFramesPerBuffer /= 2;
// }
UInt32 actualFramesPerBuffer;
UInt32 propSize = sizeof(UInt32);
result = conv_err(AudioDeviceSetProperty(device, NULL, 0, isInput, kAudioDevicePropertyBufferFrameSize, propSize, &preferredFramesPerBuffer));
result = conv_err(AudioDeviceGetProperty(device, 0, isInput, kAudioDevicePropertyBufferFrameSize, &propSize, &actualFramesPerBuffer));
if (result != paNoError) {
// do nothing
}
else if (actualFramesPerBuffer > framesPerBuffer) {
result = paBufferTooSmall;
}
else if (actualFramesPerBuffer < framesPerBuffer) {
result = paBufferTooBig;
}
return result;
}
static PaError SetUpUnidirectionalStream(AudioDeviceID device, double sampleRate, unsigned long framesPerBuffer, int isInput)
{
PaError err = paNoError;
err = SetSampleRate(device, sampleRate, isInput);
if( err == paNoError )
err = SetFramesPerBuffer(device, framesPerBuffer, isInput);
return err;
}
// ===== PortAudio functions =====
#pragma mark PortAudio functions
#ifdef __cplusplus
extern "C"
{
#endif // __cplusplus
PaError PaMacCore_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
#ifdef __cplusplus
}
#endif // __cplusplus
static void Terminate( struct PaUtilHostApiRepresentation *hostApi )
{
PaMacCoreHostApiRepresentation *macCoreHostApi = (PaMacCoreHostApiRepresentation*)hostApi;
CleanUp(macCoreHostApi);
}
static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters,
double sampleRate )
{
PaMacCoreHostApiRepresentation *macCoreHostApi = (PaMacCoreHostApiRepresentation*)hostApi;
PaDeviceInfo *deviceInfo;
PaError result = paNoError;
if (inputParameters) {
deviceInfo = macCoreHostApi->inheritedHostApiRep.deviceInfos[inputParameters->device];
if (inputParameters->channelCount > deviceInfo->maxInputChannels)
result = paInvalidChannelCount;
else if (CheckFormat(macCoreHostApi->macCoreDeviceIds[inputParameters->device], inputParameters, sampleRate, 1) != kAudioHardwareNoError) {
result = paInvalidSampleRate;
}
}
if (outputParameters && result == paNoError) {
deviceInfo = macCoreHostApi->inheritedHostApiRep.deviceInfos[outputParameters->device];
if (outputParameters->channelCount > deviceInfo->maxOutputChannels)
result = paInvalidChannelCount;
else if (CheckFormat(macCoreHostApi->macCoreDeviceIds[outputParameters->device], outputParameters, sampleRate, 0) != kAudioHardwareNoError) {
result = paInvalidSampleRate;
}
}
return result;
}
static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
PaStream** s,
const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters,
double sampleRate,
unsigned long framesPerBuffer,
PaStreamFlags streamFlags,
PaStreamCallback *streamCallback,
void *userData )
{
PaError err = paNoError;
PaMacCoreHostApiRepresentation *macCoreHostApi = (PaMacCoreHostApiRepresentation *)hostApi;
PaMacCoreStream *stream = PaUtil_AllocateMemory(sizeof(PaMacCoreStream));
stream->isActive = 0;
stream->isStopped = 1;
stream->inputDevice = kAudioDeviceUnknown;
stream->outputDevice = kAudioDeviceUnknown;
PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
( (streamCallback)
? &macCoreHostApi->callbackStreamInterface
: &macCoreHostApi->blockingStreamInterface ),
streamCallback, userData );
PaUtil_InitializeCpuLoadMeasurer( &stream->cpuLoadMeasurer, sampleRate );
*s = (PaStream*)stream;
PaMacClientData *clientData = PaUtil_AllocateMemory(sizeof(PaMacClientData));
clientData->stream = stream;
clientData->callback = streamCallback;
clientData->userData = userData;
clientData->inputBuffer = 0;
clientData->outputBuffer = 0;
clientData->ditherGenerator = PaUtil_AllocateMemory(sizeof(PaUtilTriangularDitherGenerator));
PaUtil_InitializeTriangularDitherState(clientData->ditherGenerator);
if (inputParameters != NULL) {
stream->inputDevice = macCoreHostApi->macCoreDeviceIds[inputParameters->device];
clientData->inputConverter = PaUtil_SelectConverter(paFloat32, inputParameters->sampleFormat, streamFlags);
clientData->inputBuffer = PaUtil_AllocateMemory(Pa_GetSampleSize(inputParameters->sampleFormat) * framesPerBuffer * inputParameters->channelCount);
clientData->inputChannelCount = inputParameters->channelCount;
clientData->inputSampleFormat = inputParameters->sampleFormat;
err = SetUpUnidirectionalStream(stream->inputDevice, sampleRate, framesPerBuffer, 1);
}
if (err == paNoError && outputParameters != NULL) {
stream->outputDevice = macCoreHostApi->macCoreDeviceIds[outputParameters->device];
clientData->outputConverter = PaUtil_SelectConverter(outputParameters->sampleFormat, paFloat32, streamFlags);
clientData->outputBuffer = PaUtil_AllocateMemory(Pa_GetSampleSize(outputParameters->sampleFormat) * framesPerBuffer * outputParameters->channelCount);
clientData->outputChannelCount = outputParameters->channelCount;
clientData->outputSampleFormat = outputParameters->sampleFormat;
err = SetUpUnidirectionalStream(stream->outputDevice, sampleRate, framesPerBuffer, 0);
}
if (inputParameters == NULL || outputParameters == NULL || stream->inputDevice == stream->outputDevice) {
AudioDeviceID device = (inputParameters == NULL) ? stream->outputDevice : stream->inputDevice;
AudioDeviceAddIOProc(device, AudioIOProc, clientData);
}
else {
// using different devices for input and output
AudioDeviceAddIOProc(stream->inputDevice, AudioInputProc, clientData);
AudioDeviceAddIOProc(stream->outputDevice, AudioOutputProc, clientData);
}
return err;
}
// Note: When CloseStream() is called, the multi-api layer ensures that the stream has already been stopped or aborted.
static PaError CloseStream( PaStream* s )
{
PaError err = paNoError;
PaMacCoreStream *stream = (PaMacCoreStream*)s;
PaUtil_ResetCpuLoadMeasurer( &stream->cpuLoadMeasurer );
if (stream->inputDevice != kAudioDeviceUnknown) {
if (stream->outputDevice == kAudioDeviceUnknown || stream->outputDevice == stream->inputDevice) {
err = conv_err(AudioDeviceRemoveIOProc(stream->inputDevice, AudioIOProc));
}
else {
err = conv_err(AudioDeviceRemoveIOProc(stream->inputDevice, AudioInputProc));
err = conv_err(AudioDeviceRemoveIOProc(stream->outputDevice, AudioOutputProc));
}
}
else {
err = conv_err(AudioDeviceRemoveIOProc(stream->outputDevice, AudioIOProc));
}
return err;
}
static PaError StartStream( PaStream *s )
{
PaError err = paNoError;
PaMacCoreStream *stream = (PaMacCoreStream*)s;
if (stream->inputDevice != kAudioDeviceUnknown) {
if (stream->outputDevice == kAudioDeviceUnknown || stream->outputDevice == stream->inputDevice) {
err = conv_err(AudioDeviceStart(stream->inputDevice, AudioIOProc));
}
else {
err = conv_err(AudioDeviceStart(stream->inputDevice, AudioInputProc));
err = conv_err(AudioDeviceStart(stream->outputDevice, AudioOutputProc));
}
}
else {
err = conv_err(AudioDeviceStart(stream->outputDevice, AudioIOProc));
}
stream->isActive = 1;
stream->isStopped = 0;
return err;
}
static PaError AbortStream( PaStream *s )
{
PaError err = paNoError;
PaMacCoreStream *stream = (PaMacCoreStream*)s;
if (stream->inputDevice != kAudioDeviceUnknown) {
if (stream->outputDevice == kAudioDeviceUnknown || stream->outputDevice == stream->inputDevice) {
err = conv_err(AudioDeviceStop(stream->inputDevice, AudioIOProc));
}
else {
err = conv_err(AudioDeviceStop(stream->inputDevice, AudioInputProc));
err = conv_err(AudioDeviceStop(stream->outputDevice, AudioOutputProc));
}
}
else {
err = conv_err(AudioDeviceStop(stream->outputDevice, AudioIOProc));
}
stream->isActive = 0;
stream->isStopped = 1;
return err;
}
static PaError StopStream( PaStream *s )
{
// TODO: this should be nicer than abort
return AbortStream(s);
}
static PaError IsStreamStopped( PaStream *s )
{
PaMacCoreStream *stream = (PaMacCoreStream*)s;
return stream->isStopped;
}
static PaError IsStreamActive( PaStream *s )
{
PaMacCoreStream *stream = (PaMacCoreStream*)s;
return stream->isActive;
}
static PaTime GetStreamTime( PaStream *s )
{
OSStatus err;
PaTime result;
PaMacCoreStream *stream = (PaMacCoreStream*)s;
AudioTimeStamp *timeStamp = PaUtil_AllocateMemory(sizeof(AudioTimeStamp));
if (stream->inputDevice != kAudioDeviceUnknown) {
err = AudioDeviceGetCurrentTime(stream->inputDevice, timeStamp);
}
else {
err = AudioDeviceGetCurrentTime(stream->outputDevice, timeStamp);
}
result = err ? 0 : timeStamp->mSampleTime;
PaUtil_FreeMemory(timeStamp);
return result;
}
static double GetStreamCpuLoad( PaStream* s )
{
PaMacCoreStream *stream = (PaMacCoreStream*)s;
return PaUtil_GetCpuLoad( &stream->cpuLoadMeasurer );
}
// As separate stream interfaces are used for blocking and callback streams, the following functions can be guaranteed to only be called for blocking streams.
static PaError ReadStream( PaStream* s,
void *buffer,
unsigned long frames )
{
return paInternalError;
}
static PaError WriteStream( PaStream* s,
const void *buffer,
unsigned long frames )
{
return paInternalError;
}
static signed long GetStreamReadAvailable( PaStream* s )
{
return paInternalError;
}
static signed long GetStreamWriteAvailable( PaStream* s )
{
return paInternalError;
}
// HostAPI-specific initialization function
PaError PaMacCore_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex hostApiIndex )
{
PaError result = paNoError;
PaMacCoreHostApiRepresentation *macCoreHostApi = (PaMacCoreHostApiRepresentation *)PaUtil_AllocateMemory( sizeof(PaMacCoreHostApiRepresentation) );
if( !macCoreHostApi )
{
result = paInsufficientMemory;
goto error;
}
macCoreHostApi->allocations = PaUtil_CreateAllocationGroup();
if( !macCoreHostApi->allocations )
{
result = paInsufficientMemory;
goto error;
}
*hostApi = &macCoreHostApi->inheritedHostApiRep;
(*hostApi)->info.structVersion = 1;
(*hostApi)->info.type = paCoreAudio;
(*hostApi)->info.name = "CoreAudio";
result = InitializeDeviceInfos(macCoreHostApi, hostApiIndex);
if (result != paNoError) {
goto error;
}
// Set up the proper callbacks to this HostApi's functions
(*hostApi)->Terminate = Terminate;
(*hostApi)->OpenStream = OpenStream;
(*hostApi)->IsFormatSupported = IsFormatSupported;
PaUtil_InitializeStreamInterface( &macCoreHostApi->callbackStreamInterface, CloseStream, StartStream,
StopStream, AbortStream, IsStreamStopped, IsStreamActive,
GetStreamTime, GetStreamCpuLoad,
PaUtil_DummyRead, PaUtil_DummyWrite,
PaUtil_DummyGetReadAvailable, PaUtil_DummyGetWriteAvailable );
PaUtil_InitializeStreamInterface( &macCoreHostApi->blockingStreamInterface, CloseStream, StartStream,
StopStream, AbortStream, IsStreamStopped, IsStreamActive,
GetStreamTime, PaUtil_DummyGetCpuLoad,
ReadStream, WriteStream, GetStreamReadAvailable, GetStreamWriteAvailable );
return result;
error:
if( macCoreHostApi ) {
CleanUp(macCoreHostApi);
}
return result;
}

565
portaudio-v19/src/hostapi/coreaudio/pa_mac_core_utilities.c Normal file
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/*
*
* pa_mac_core_utilities.c
*
* utilitiy functions for pa_mac_core.c
*
* This functions are more like helper functions than part of the core,
* so I moved them to a separate file so the core code would be cleaner.
*
* by Bjorn Roche.
*/
#include "pa_mac_core_utilities.h"
PaError PaMacCore_SetUnixError( int err, int line )
{
PaError ret;
const char *errorText;
if( err == 0 )
{
return paNoError;
}
ret = paNoError;
errorText = strerror( err );
/** Map Unix error to PaError. Pretty much the only one that maps
is ENOMEM. */
if( err == ENOMEM )
ret = paInsufficientMemory;
else
ret = paInternalError;
DBUG(("%d on line %d: msg='%s'\n", err, line, errorText));
PaUtil_SetLastHostErrorInfo( paCoreAudio, err, errorText );
return ret;
}
/*
* Translates MacOS generated errors into PaErrors
*/
PaError PaMacCore_SetError(OSStatus error, int line, int isError)
{
/*FIXME: still need to handle possible ComponentResult values.*/
/* unfortunately, they don't seem to be documented anywhere.*/
PaError result;
const char *errorType;
const char *errorText;
switch (error) {
case kAudioHardwareNoError:
return paNoError;
case kAudioHardwareNotRunningError:
errorText = "Audio Hardware Not Running";
result = paInternalError; break;
case kAudioHardwareUnspecifiedError:
errorText = "Unspecified Audio Hardware Error";
result = paInternalError; break;
case kAudioHardwareUnknownPropertyError:
errorText = "Audio Hardware: Unknown Property";
result = paInternalError; break;
case kAudioHardwareBadPropertySizeError:
errorText = "Audio Hardware: Bad Property Size";
result = paInternalError; break;
case kAudioHardwareIllegalOperationError:
errorText = "Audio Hardware: Illegal Operation";
result = paInternalError; break;
case kAudioHardwareBadDeviceError:
errorText = "Audio Hardware: Bad Device";
result = paInvalidDevice; break;
case kAudioHardwareBadStreamError:
errorText = "Audio Hardware: BadStream";
result = paBadStreamPtr; break;
case kAudioHardwareUnsupportedOperationError:
errorText = "Audio Hardware: Unsupported Operation";
result = paInternalError; break;
case kAudioDeviceUnsupportedFormatError:
errorText = "Audio Device: Unsupported Format";
result = paSampleFormatNotSupported; break;
case kAudioDevicePermissionsError:
errorText = "Audio Device: Permissions Error";
result = paDeviceUnavailable; break;
/* Audio Unit Errors: http://developer.apple.com/documentation/MusicAudio/Reference/CoreAudio/audio_units/chapter_5_section_3.html */
case kAudioUnitErr_InvalidProperty:
errorText = "Audio Unit: Invalid Property";
result = paInternalError; break;
case kAudioUnitErr_InvalidParameter:
errorText = "Audio Unit: Invalid Parameter";
result = paInternalError; break;
case kAudioUnitErr_NoConnection:
errorText = "Audio Unit: No Connection";
result = paInternalError; break;
case kAudioUnitErr_FailedInitialization:
errorText = "Audio Unit: Initialization Failed";
result = paInternalError; break;
case kAudioUnitErr_TooManyFramesToProcess:
errorText = "Audio Unit: Too Many Frames";
result = paInternalError; break;
case kAudioUnitErr_IllegalInstrument:
errorText = "Audio Unit: Illegal Instrument";
result = paInternalError; break;
case kAudioUnitErr_InstrumentTypeNotFound:
errorText = "Audio Unit: Instrument Type Not Found";
result = paInternalError; break;
case kAudioUnitErr_InvalidFile:
errorText = "Audio Unit: Invalid File";
result = paInternalError; break;
case kAudioUnitErr_UnknownFileType:
errorText = "Audio Unit: Unknown File Type";
result = paInternalError; break;
case kAudioUnitErr_FileNotSpecified:
errorText = "Audio Unit: File Not Specified";
result = paInternalError; break;
case kAudioUnitErr_FormatNotSupported:
errorText = "Audio Unit: Format Not Supported";
result = paInternalError; break;
case kAudioUnitErr_Uninitialized:
errorText = "Audio Unit: Unitialized";
result = paInternalError; break;
case kAudioUnitErr_InvalidScope:
errorText = "Audio Unit: Invalid Scope";
result = paInternalError; break;
case kAudioUnitErr_PropertyNotWritable:
errorText = "Audio Unit: PropertyNotWritable";
result = paInternalError; break;
case kAudioUnitErr_InvalidPropertyValue:
errorText = "Audio Unit: Invalid Property Value";
result = paInternalError; break;
case kAudioUnitErr_PropertyNotInUse:
errorText = "Audio Unit: Property Not In Use";
result = paInternalError; break;
case kAudioUnitErr_Initialized:
errorText = "Audio Unit: Initialized";
result = paInternalError; break;
case kAudioUnitErr_InvalidOfflineRender:
errorText = "Audio Unit: Invalid Offline Render";
result = paInternalError; break;
case kAudioUnitErr_Unauthorized:
errorText = "Audio Unit: Unauthorized";
result = paInternalError; break;
case kAudioUnitErr_CannotDoInCurrentContext:
errorText = "Audio Unit: cannot do in current context";
result = paInternalError; break;
default:
errorText = "Unknown Error";
result = paInternalError;
}
if (isError)
errorType = "Error";
else
errorType = "Warning";
if ((int)error < -99999 || (int)error > 99999)
DBUG(("%s on line %d: err='%4s', msg='%s'\n", errorType, line, (const char *)&error, errorText));
else
DBUG(("%s on line %d: err=%d, 0x%x, msg='%s'\n", errorType, line, (int)error, (unsigned)error, errorText));
PaUtil_SetLastHostErrorInfo( paCoreAudio, error, errorText );
return result;
}
/*
* This function computes an appropriate ring buffer size given
* a requested latency (in seconds), sample rate and framesPerBuffer.
*
* The returned ringBufferSize is computed using the following
* constraints:
* - it must be at least 4.
* - it must be at least 3x framesPerBuffer.
* - it must be at least 2x the suggestedLatency.
* - it must be a power of 2.
* This function attempts to compute the minimum such size.
*
* FEEDBACK: too liberal/conservative/another way?
*/
long computeRingBufferSize( const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters,
long inputFramesPerBuffer,
long outputFramesPerBuffer,
double sampleRate )
{
long ringSize;
int index;
int i;
double latencyTimesChannelCount ;
long framesPerBufferTimesChannelCount ;
VVDBUG(( "computeRingBufferSize()\n" ));
assert( inputParameters || outputParameters );
if( outputParameters && inputParameters )
{
latencyTimesChannelCount = MAX(
inputParameters->suggestedLatency * inputParameters->channelCount,
outputParameters->suggestedLatency * outputParameters->channelCount );
framesPerBufferTimesChannelCount = MAX(
inputFramesPerBuffer * inputParameters->channelCount,
outputFramesPerBuffer * outputParameters->channelCount );
}
else if( outputParameters )
{
latencyTimesChannelCount
= outputParameters->suggestedLatency * outputParameters->channelCount;
framesPerBufferTimesChannelCount
= outputFramesPerBuffer * outputParameters->channelCount;
}
else /* we have inputParameters */
{
latencyTimesChannelCount
= inputParameters->suggestedLatency * inputParameters->channelCount;
framesPerBufferTimesChannelCount
= inputFramesPerBuffer * inputParameters->channelCount;
}
ringSize = (long) ( latencyTimesChannelCount * sampleRate * 2 + .5);
VDBUG( ( "suggested latency * channelCount: %d\n", (int) (latencyTimesChannelCount*sampleRate) ) );
if( ringSize < framesPerBufferTimesChannelCount * 3 )
ringSize = framesPerBufferTimesChannelCount * 3 ;
VDBUG(("framesPerBuffer*channelCount:%d\n",(int)framesPerBufferTimesChannelCount));
VDBUG(("Ringbuffer size (1): %d\n", (int)ringSize ));
/* make sure it's at least 4 */
ringSize = MAX( ringSize, 4 );
/* round up to the next power of 2 */
index = -1;
for( i=0; i<sizeof(long)*8; ++i )
if( ringSize >> i & 0x01 )
index = i;
assert( index > 0 );
if( ringSize <= ( 0x01 << index ) )
ringSize = 0x01 << index ;
else
ringSize = 0x01 << ( index + 1 );
VDBUG(( "Final Ringbuffer size (2): %d\n", (int)ringSize ));
return ringSize;
}
/*
* Durring testing of core audio, I found that serious crashes could occur
* if properties such as sample rate were changed multiple times in rapid
* succession. The function below has some fancy logic to make sure that changes
* are acknowledged before another is requested. That seems to help a lot.
*/
OSStatus propertyProc(
AudioDeviceID inDevice,
UInt32 inChannel,
Boolean isInput,
AudioDevicePropertyID inPropertyID,
void* inClientData )
{
MutexAndBool *mab = (MutexAndBool *) inClientData;
mab->once = TRUE;
pthread_mutex_unlock( &(mab->mutex) );
return noErr;
}
/* sets the value of the given property and waits for the change to
be acknowledged, and returns the final value, which is not guaranteed
by this function to be the same as the desired value. Obviously, this
function can only be used for data whose input and output are the
same size and format, and their size and format are known in advance.*/
PaError AudioDeviceSetPropertyNowAndWaitForChange(
AudioDeviceID inDevice,
UInt32 inChannel,
Boolean isInput,
AudioDevicePropertyID inPropertyID,
UInt32 inPropertyDataSize,
const void *inPropertyData,
void *outPropertyData )
{
OSStatus macErr;
int unixErr;
MutexAndBool mab;
UInt32 outPropertyDataSize = inPropertyDataSize;
/* First, see if it already has that value. If so, return. */
macErr = AudioDeviceGetProperty( inDevice, inChannel,
isInput, inPropertyID,
&outPropertyDataSize, outPropertyData );
if( macErr )
goto failMac2;
if( inPropertyDataSize!=outPropertyDataSize )
return paInternalError;
if( 0==memcmp( outPropertyData, inPropertyData, outPropertyDataSize ) )
return paNoError;
/* setup and lock mutex */
mab.once = FALSE;
unixErr = pthread_mutex_init( &mab.mutex, NULL );
if( unixErr )
goto failUnix2;
unixErr = pthread_mutex_lock( &mab.mutex );
if( unixErr )
goto failUnix;
/* add property listener */
macErr = AudioDeviceAddPropertyListener( inDevice, inChannel, isInput,
inPropertyID, propertyProc,
&mab );
if( macErr )
goto failMac;
/* set property */
macErr = AudioDeviceSetProperty( inDevice, NULL, inChannel,
isInput, inPropertyID,
inPropertyDataSize, inPropertyData );
if( macErr ) {
/* we couldn't set the property, so we'll just unlock the mutex
and move on. */
pthread_mutex_unlock( &mab.mutex );
}
/* wait for property to change */
unixErr = pthread_mutex_lock( &mab.mutex );
if( unixErr )
goto failUnix;
/* now read the property back out */
macErr = AudioDeviceGetProperty( inDevice, inChannel,
isInput, inPropertyID,
&outPropertyDataSize, outPropertyData );
if( macErr )
goto failMac;
/* cleanup */
AudioDeviceRemovePropertyListener( inDevice, inChannel, isInput,
inPropertyID, propertyProc );
unixErr = pthread_mutex_unlock( &mab.mutex );
if( unixErr )
goto failUnix2;
unixErr = pthread_mutex_destroy( &mab.mutex );
if( unixErr )
goto failUnix2;
return paNoError;
failUnix:
pthread_mutex_destroy( &mab.mutex );
AudioDeviceRemovePropertyListener( inDevice, inChannel, isInput,
inPropertyID, propertyProc );
failUnix2:
DBUG( ("Error #%d while setting a device property: %s\n", unixErr, strerror( unixErr ) ) );
return paUnanticipatedHostError;
failMac:
pthread_mutex_destroy( &mab.mutex );
AudioDeviceRemovePropertyListener( inDevice, inChannel, isInput,
inPropertyID, propertyProc );
failMac2:
return ERR( macErr );
}
/*
* Sets the sample rate the HAL device.
* if requireExact: set the sample rate or fail.
*
* otherwise : set the exact sample rate.
* If that fails, check for available sample rates, and choose one
* higher than the requested rate. If there isn't a higher one,
* just use the highest available.
*/
PaError setBestSampleRateForDevice( const AudioDeviceID device,
const bool isOutput,
const bool requireExact,
const Float64 desiredSrate )
{
/*FIXME: changing the sample rate is disruptive to other programs using the
device, so it might be good to offer a custom flag to not change the
sample rate and just do conversion. (in my casual tests, there is
no disruption unless the sample rate really does need to change) */
const bool isInput = isOutput ? 0 : 1;
Float64 srate;
UInt32 propsize = sizeof( Float64 );
OSErr err;
AudioValueRange *ranges;
int i=0;
Float64 max = -1; /*the maximum rate available*/
Float64 best = -1; /*the lowest sample rate still greater than desired rate*/
VDBUG(("Setting sample rate for device %ld to %g.\n",device,(float)desiredSrate));
/* -- try setting the sample rate -- */
err = AudioDeviceSetPropertyNowAndWaitForChange(
device, 0, isInput,
kAudioDevicePropertyNominalSampleRate,
propsize, &desiredSrate, &srate );
if( err )
return err;
/* -- if the rate agrees, and we got no errors, we are done -- */
if( !err && srate == desiredSrate )
return paNoError;
/* -- we've failed if the rates disagree and we are setting input -- */
if( requireExact )
return paInvalidSampleRate;
/* -- generate a list of available sample rates -- */
err = AudioDeviceGetPropertyInfo( device, 0, isInput,
kAudioDevicePropertyAvailableNominalSampleRates,
&propsize, NULL );
if( err )
return ERR( err );
ranges = (AudioValueRange *)calloc( 1, propsize );
if( !ranges )
return paInsufficientMemory;
err = AudioDeviceGetProperty( device, 0, isInput,
kAudioDevicePropertyAvailableNominalSampleRates,
&propsize, ranges );
if( err )
{
free( ranges );
return ERR( err );
}
VDBUG(("Requested sample rate of %g was not available.\n", (float)desiredSrate));
VDBUG(("%lu Available Sample Rates are:\n",propsize/sizeof(AudioValueRange)));
#ifdef MAC_CORE_VERBOSE_DEBUG
for( i=0; i<propsize/sizeof(AudioValueRange); ++i )
VDBUG( ("\t%g-%g\n",
(float) ranges[i].mMinimum,
(float) ranges[i].mMaximum ) );
#endif
VDBUG(("-----\n"));
/* -- now pick the best available sample rate -- */
for( i=0; i<propsize/sizeof(AudioValueRange); ++i )
{
if( ranges[i].mMaximum > max ) max = ranges[i].mMaximum;
if( ranges[i].mMinimum > desiredSrate ) {
if( best < 0 )
best = ranges[i].mMinimum;
else if( ranges[i].mMinimum < best )
best = ranges[i].mMinimum;
}
}
if( best < 0 )
best = max;
VDBUG( ("Maximum Rate %g. best is %g.\n", max, best ) );
free( ranges );
/* -- set the sample rate -- */
propsize = sizeof( best );
err = AudioDeviceSetPropertyNowAndWaitForChange(
device, 0, isInput,
kAudioDevicePropertyNominalSampleRate,
propsize, &best, &srate );
if( err )
return err;
if( err )
return ERR( err );
/* -- if the set rate matches, we are done -- */
if( srate == best )
return paNoError;
/* -- otherwise, something wierd happened: we didn't set the rate, and we got no errors. Just bail. */
return paInternalError;
}
/*
Attempts to set the requestedFramesPerBuffer. If it can't set the exact
value, it settles for something smaller if available. If nothing smaller
is available, it uses the smallest available size.
actualFramesPerBuffer will be set to the actual value on successful return.
OK to pass NULL to actualFramesPerBuffer.
The logic is very simmilar too setBestSampleRate only failure here is
not usually catastrophic.
*/
PaError setBestFramesPerBuffer( const AudioDeviceID device,
const bool isOutput,
unsigned long requestedFramesPerBuffer,
unsigned long *actualFramesPerBuffer )
{
UInt32 afpb;
const bool isInput = !isOutput;
UInt32 propsize = sizeof(UInt32);
OSErr err;
Float64 min = -1; /*the min blocksize*/
Float64 best = -1; /*the best blocksize*/
int i=0;
AudioValueRange *ranges;
if( actualFramesPerBuffer == NULL )
actualFramesPerBuffer = &afpb;
/* -- try and set exact FPB -- */
err = AudioDeviceSetProperty( device, NULL, 0, isInput,
kAudioDevicePropertyBufferFrameSize,
propsize, &requestedFramesPerBuffer);
err = AudioDeviceGetProperty( device, 0, isInput,
kAudioDevicePropertyBufferFrameSize,
&propsize, actualFramesPerBuffer);
if( err )
return ERR( err );
if( *actualFramesPerBuffer == requestedFramesPerBuffer )
return paNoError; /* we are done */
/* -- fetch available block sizes -- */
err = AudioDeviceGetPropertyInfo( device, 0, isInput,
kAudioDevicePropertyBufferSizeRange,
&propsize, NULL );
if( err )
return ERR( err );
ranges = (AudioValueRange *)calloc( 1, propsize );
if( !ranges )
return paInsufficientMemory;
err = AudioDeviceGetProperty( device, 0, isInput,
kAudioDevicePropertyBufferSizeRange,
&propsize, ranges );
if( err )
{
free( ranges );
return ERR( err );
}
VDBUG(("Requested block size of %lu was not available.\n",
requestedFramesPerBuffer ));
VDBUG(("%lu Available block sizes are:\n",propsize/sizeof(AudioValueRange)));
#ifdef MAC_CORE_VERBOSE_DEBUG
for( i=0; i<propsize/sizeof(AudioValueRange); ++i )
VDBUG( ("\t%g-%g\n",
(float) ranges[i].mMinimum,
(float) ranges[i].mMaximum ) );
#endif
VDBUG(("-----\n"));
/* --- now pick the best available framesPerBuffer -- */
for( i=0; i<propsize/sizeof(AudioValueRange); ++i )
{
if( min == -1 || ranges[i].mMinimum < min ) min = ranges[i].mMinimum;
if( ranges[i].mMaximum < requestedFramesPerBuffer ) {
if( best < 0 )
best = ranges[i].mMaximum;
else if( ranges[i].mMaximum > best )
best = ranges[i].mMaximum;
}
}
if( best == -1 )
best = min;
VDBUG( ("Minimum FPB %g. best is %g.\n", min, best ) );
free( ranges );
/* --- set the buffer size (ignore errors) -- */
requestedFramesPerBuffer = (UInt32) best ;
propsize = sizeof( UInt32 );
err = AudioDeviceSetProperty( device, NULL, 0, isInput,
kAudioDevicePropertyBufferSize,
propsize, &requestedFramesPerBuffer );
/* --- read the property to check that it was set -- */
err = AudioDeviceGetProperty( device, 0, isInput,
kAudioDevicePropertyBufferSize,
&propsize, actualFramesPerBuffer );
if( err )
return ERR( err );
return paNoError;
}

159
portaudio-v19/src/hostapi/coreaudio/pa_mac_core_utilities.h Normal file
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/*
*
* pa_mac_core_utilities.c
*
* utilitiy functions for pa_mac_core.c
*
* This functions are more like helper functions than part of the core,
* so I moved them to a separate file so the core code would be cleaner.
*
* by Bjorn Roche.
*/
#ifndef PA_MAC_CORE_UTILITIES_H__
#define PA_MAC_CORE_UTILITIES_H__
#include <pthread.h>
#include "portaudio.h"
#include "pa_util.h"
#include <AudioUnit/AudioUnit.h>
#include <AudioToolbox/AudioToolbox.h>
#ifndef MIN
#define MIN(a, b) (((a)<(b))?(a):(b))
#endif
#ifndef MAX
#define MAX(a, b) (((a)<(b))?(b):(a))
#endif
#define ERR(mac_error) PaMacCore_SetError(mac_error, __LINE__, 1 )
#define WARNING(mac_error) PaMacCore_SetError(mac_error, __LINE__, 0 )
/* Help keep track of AUHAL element numbers */
#define INPUT_ELEMENT (1)
#define OUTPUT_ELEMENT (0)
/* Normal level of debugging: fine for most apps that don't mind the occational warning being printf'ed */
/*
*/
#define MAC_CORE_DEBUG
#ifdef MAC_CORE_DEBUG
# define DBUG(MSG) do { printf("||PaMacCore (AUHAL)|| "); printf MSG ; fflush(stdout); } while(0)
#else
# define DBUG(MSG)
#endif
/* Verbose Debugging: useful for developement */
/*
#define MAC_CORE_VERBOSE_DEBUG
*/
#ifdef MAC_CORE_VERBOSE_DEBUG
# define VDBUG(MSG) do { printf("||PaMacCore (v )|| "); printf MSG ; fflush(stdout); } while(0)
#else
# define VDBUG(MSG)
#endif
/* Very Verbose Debugging: Traces every call. */
/*
#define MAC_CORE_VERY_VERBOSE_DEBUG
*/
#ifdef MAC_CORE_VERY_VERBOSE_DEBUG
# define VVDBUG(MSG) do { printf("||PaMacCore (vv)|| "); printf MSG ; fflush(stdout); } while(0)
#else
# define VVDBUG(MSG)
#endif
#define UNIX_ERR(err) PaMacCore_SetUnixError( err, __LINE__ )
PaError PaMacCore_SetUnixError( int err, int line );
/*
* Translates MacOS generated errors into PaErrors
*/
PaError PaMacCore_SetError(OSStatus error, int line, int isError);
/*
* This function computes an appropriate ring buffer size given
* a requested latency (in seconds), sample rate and framesPerBuffer.
*
* The returned ringBufferSize is computed using the following
* constraints:
* - it must be at least 4.
* - it must be at least 3x framesPerBuffer.
* - it must be at least 2x the suggestedLatency.
* - it must be a power of 2.
* This function attempts to compute the minimum such size.
*
*/
long computeRingBufferSize( const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters,
long inputFramesPerBuffer,
long outputFramesPerBuffer,
double sampleRate );
/*
* Durring testing of core audio, I found that serious crashes could occur
* if properties such as sample rate were changed multiple times in rapid
* succession. The function below has some fancy logic to make sure that changes
* are acknowledged before another is requested. That seems to help a lot.
*/
typedef struct {
bool once; /* I didn't end up using this. bdr */
pthread_mutex_t mutex;
} MutexAndBool ;
OSStatus propertyProc(
AudioDeviceID inDevice,
UInt32 inChannel,
Boolean isInput,
AudioDevicePropertyID inPropertyID,
void* inClientData );
/* sets the value of the given property and waits for the change to
be acknowledged, and returns the final value, which is not guaranteed
by this function to be the same as the desired value. Obviously, this
function can only be used for data whose input and output are the
same size and format, and their size and format are known in advance.*/
PaError AudioDeviceSetPropertyNowAndWaitForChange(
AudioDeviceID inDevice,
UInt32 inChannel,
Boolean isInput,
AudioDevicePropertyID inPropertyID,
UInt32 inPropertyDataSize,
const void *inPropertyData,
void *outPropertyData );
/*
* Sets the sample rate the HAL device.
* if requireExact: set the sample rate or fail.
*
* otherwise : set the exact sample rate.
* If that fails, check for available sample rates, and choose one
* higher than the requested rate. If there isn't a higher one,
* just use the highest available.
*/
PaError setBestSampleRateForDevice( const AudioDeviceID device,
const bool isOutput,
const bool requireExact,
const Float64 desiredSrate );
/*
Attempts to set the requestedFramesPerBuffer. If it can't set the exact
value, it settles for something smaller if available. If nothing smaller
is available, it uses the smallest available size.
actualFramesPerBuffer will be set to the actual value on successful return.
OK to pass NULL to actualFramesPerBuffer.
The logic is very simmilar too setBestSampleRate only failure here is
not usually catastrophic.
*/
PaError setBestFramesPerBuffer( const AudioDeviceID device,
const bool isOutput,
unsigned long requestedFramesPerBuffer,
unsigned long *actualFramesPerBuffer );
#endif /* PA_MAC_CORE_UTILITIES_H__*/

254
portaudio-v19/src/hostapi/coreaudio/ringbuffer.c Normal file
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/*
* $Id$
* ringbuffer.c
* Ring Buffer utility..
*
* Author: Phil Burk, http://www.softsynth.com
* modified for SMP safety on Mac OS X by Bjorn Roche
* also, alowed for const where possible
* Note that this is safe only for a single-thread reader and a
* single-thread writer.
*
* This program uses the PortAudio Portable Audio Library.
* For more information see: http://www.audiomulch.com/portaudio/
* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "ringbuffer.h"
#include <string.h>
/*
* We can undefine this, to turn off memory barriers, but that
* is only useful if we know we don't need to be MP safe or
* we are interested in doing some kind of tests.
*/
#define MPSAFE
/****************
* First, we'll define some memory barrier primitives based on the system.
* right now only OS X and FreeBSD are supported. In addition to providing
* memory barriers, these functions should ensure that data cached in registers
* is written out to cache where it can be snooped by other CPUs. (ie, the volatile
* keyword should not be required)
*
* the primitives that must be defined are:
*
* FullMemoryBarrier()
* ReadMemoryBarrier()
* WriteMemoryBarrier()
*
****************/
#if defined(__APPLE__) || defined(__FreeBSD__)
# include <libkern/OSAtomic.h>
/* Here are the memory barrier functions. Mac OS X and FreeBSD only provide
full memory barriers, so the three types of barriers are the same.
The asm volatile may be redundant with the memory barrier, but
until I have proof of that, I'm leaving it. */
# define FullMemoryBarrier() do{ asm volatile("":::"memory"); OSMemoryBarrier(); }while(false)
# define ReadMemoryBarrier() do{ asm volatile("":::"memory"); OSMemoryBarrier(); }while(false)
# define WriteMemoryBarrier() do{ asm volatile("":::"memory"); OSMemoryBarrier(); }while(false)
#else
# error Memory Barriers not defined on this system or system unknown
#endif
/***************************************************************************
* Initialize FIFO.
* numBytes must be power of 2, returns -1 if not.
*/
long RingBuffer_Init( RingBuffer *rbuf, long numBytes, void *dataPtr )
{
if( ((numBytes-1) & numBytes) != 0) return -1; /* Not Power of two. */
rbuf->bufferSize = numBytes;
rbuf->buffer = (char *)dataPtr;
RingBuffer_Flush( rbuf );
rbuf->bigMask = (numBytes*2)-1;
rbuf->smallMask = (numBytes)-1;
return 0;
}
/***************************************************************************
** Return number of bytes available for reading. */
long RingBuffer_GetReadAvailable( RingBuffer *rbuf )
{
#ifdef MPSAFE
ReadMemoryBarrier();
#endif
return ( (rbuf->writeIndex - rbuf->readIndex) & rbuf->bigMask );
}
/***************************************************************************
** Return number of bytes available for writing. */
long RingBuffer_GetWriteAvailable( RingBuffer *rbuf )
{
/* Since we are calling RingBuffer_GetReadAvailable, we don't need an aditional MB */
return ( rbuf->bufferSize - RingBuffer_GetReadAvailable(rbuf));
}
/***************************************************************************
** Clear buffer. Should only be called when buffer is NOT being read. */
void RingBuffer_Flush( RingBuffer *rbuf )
{
rbuf->writeIndex = rbuf->readIndex = 0;
}
/***************************************************************************
** Get address of region(s) to which we can write data.
** If the region is contiguous, size2 will be zero.
** If non-contiguous, size2 will be the size of second region.
** Returns room available to be written or numBytes, whichever is smaller.
*/
long RingBuffer_GetWriteRegions( RingBuffer *rbuf, long numBytes,
void **dataPtr1, long *sizePtr1,
void **dataPtr2, long *sizePtr2 )
{
long index;
long available = RingBuffer_GetWriteAvailable( rbuf );
if( numBytes > available ) numBytes = available;
/* Check to see if write is not contiguous. */
index = rbuf->writeIndex & rbuf->smallMask;
if( (index + numBytes) > rbuf->bufferSize )
{
/* Write data in two blocks that wrap the buffer. */
long firstHalf = rbuf->bufferSize - index;
*dataPtr1 = &rbuf->buffer[index];
*sizePtr1 = firstHalf;
*dataPtr2 = &rbuf->buffer[0];
*sizePtr2 = numBytes - firstHalf;
}
else
{
*dataPtr1 = &rbuf->buffer[index];
*sizePtr1 = numBytes;
*dataPtr2 = NULL;
*sizePtr2 = 0;
}
return numBytes;
}
/***************************************************************************
*/
long RingBuffer_AdvanceWriteIndex( RingBuffer *rbuf, long numBytes )
{
#ifdef MPSAFE
/* we need to ensure that previous writes are seen before we update the write index */
WriteMemoryBarrier();
return rbuf->writeIndex = (rbuf->writeIndex + numBytes) & rbuf->bigMask;
#else
return rbuf->writeIndex = (rbuf->writeIndex + numBytes) & rbuf->bigMask;
#endif
}
/***************************************************************************
** Get address of region(s) from which we can read data.
** If the region is contiguous, size2 will be zero.
** If non-contiguous, size2 will be the size of second region.
** Returns room available to be written or numBytes, whichever is smaller.
*/
long RingBuffer_GetReadRegions( RingBuffer *rbuf, long numBytes,
void **dataPtr1, long *sizePtr1,
void **dataPtr2, long *sizePtr2 )
{
long index;
long available = RingBuffer_GetReadAvailable( rbuf );
if( numBytes > available ) numBytes = available;
/* Check to see if read is not contiguous. */
index = rbuf->readIndex & rbuf->smallMask;
if( (index + numBytes) > rbuf->bufferSize )
{
/* Write data in two blocks that wrap the buffer. */
long firstHalf = rbuf->bufferSize - index;
*dataPtr1 = &rbuf->buffer[index];
*sizePtr1 = firstHalf;
*dataPtr2 = &rbuf->buffer[0];
*sizePtr2 = numBytes - firstHalf;
}
else
{
*dataPtr1 = &rbuf->buffer[index];
*sizePtr1 = numBytes;
*dataPtr2 = NULL;
*sizePtr2 = 0;
}
return numBytes;
}
/***************************************************************************
*/
long RingBuffer_AdvanceReadIndex( RingBuffer *rbuf, long numBytes )
{
#ifdef MPSAFE
/* we need to ensure that previous writes are always seen before updating the index. */
WriteMemoryBarrier();
return rbuf->readIndex = (rbuf->readIndex + numBytes) & rbuf->bigMask;
#else
return rbuf->readIndex = (rbuf->readIndex + numBytes) & rbuf->bigMask;
#endif
}
/***************************************************************************
** Return bytes written. */
long RingBuffer_Write( RingBuffer *rbuf, const void *data, long numBytes )
{
long size1, size2, numWritten;
void *data1, *data2;
numWritten = RingBuffer_GetWriteRegions( rbuf, numBytes, &data1, &size1, &data2, &size2 );
if( size2 > 0 )
{
memcpy( data1, data, size1 );
data = ((char *)data) + size1;
memcpy( data2, data, size2 );
}
else
{
memcpy( data1, data, size1 );
}
RingBuffer_AdvanceWriteIndex( rbuf, numWritten );
return numWritten;
}
/***************************************************************************
** Return bytes read. */
long RingBuffer_Read( RingBuffer *rbuf, void *data, long numBytes )
{
long size1, size2, numRead;
void *data1, *data2;
numRead = RingBuffer_GetReadRegions( rbuf, numBytes, &data1, &size1, &data2, &size2 );
if( size2 > 0 )
{
memcpy( data, data1, size1 );
data = ((char *)data) + size1;
memcpy( data, data2, size2 );
}
else
{
memcpy( data, data1, size1 );
}
RingBuffer_AdvanceReadIndex( rbuf, numRead );
return numRead;
}

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#ifndef _RINGBUFFER_H
#define _RINGBUFFER_H
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/*
* $Id$
* ringbuffer.h
* Ring Buffer utility..
*
* Author: Phil Burk, http://www.softsynth.com
* modified for SMP safety on OS X by Bjorn Roche.
* also allowed for const where possible.
* Note that this is safe only for a single-thread reader
* and a single-thread writer.
*
* This program is distributed with the PortAudio Portable Audio Library.
* For more information see: http://www.audiomulch.com/portaudio/
* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "ringbuffer.h"
#include <string.h>
typedef struct
{
long bufferSize; /* Number of bytes in FIFO. Power of 2. Set by RingBuffer_Init. */
long writeIndex; /* Index of next writable byte. Set by RingBuffer_AdvanceWriteIndex. */
long readIndex; /* Index of next readable byte. Set by RingBuffer_AdvanceReadIndex. */
long bigMask; /* Used for wrapping indices with extra bit to distinguish full/empty. */
long smallMask; /* Used for fitting indices to buffer. */
char * buffer;
}
RingBuffer;
/*
* Initialize Ring Buffer.
* numBytes must be power of 2, returns -1 if not.
*/
long RingBuffer_Init( RingBuffer *rbuf, long numBytes, void *dataPtr );
/* Clear buffer. Should only be called when buffer is NOT being read. */
void RingBuffer_Flush( RingBuffer *rbuf );
/* Return number of bytes available for writing. */
long RingBuffer_GetWriteAvailable( RingBuffer *rbuf );
/* Return number of bytes available for read. */
long RingBuffer_GetReadAvailable( RingBuffer *rbuf );
/* Return bytes written. */
long RingBuffer_Write( RingBuffer *rbuf, const void *data, long numBytes );
/* Return bytes read. */
long RingBuffer_Read( RingBuffer *rbuf, void *data, long numBytes );
/* Get address of region(s) to which we can write data.
** If the region is contiguous, size2 will be zero.
** If non-contiguous, size2 will be the size of second region.
** Returns room available to be written or numBytes, whichever is smaller.
*/
long RingBuffer_GetWriteRegions( RingBuffer *rbuf, long numBytes,
void **dataPtr1, long *sizePtr1,
void **dataPtr2, long *sizePtr2 );
long RingBuffer_AdvanceWriteIndex( RingBuffer *rbuf, long numBytes );
/* Get address of region(s) from which we can read data.
** If the region is contiguous, size2 will be zero.
** If non-contiguous, size2 will be the size of second region.
** Returns room available to be written or numBytes, whichever is smaller.
*/
long RingBuffer_GetReadRegions( RingBuffer *rbuf, long numBytes,
void **dataPtr1, long *sizePtr1,
void **dataPtr2, long *sizePtr2 );
long RingBuffer_AdvanceReadIndex( RingBuffer *rbuf, long numBytes );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _RINGBUFFER_H */

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#include "pa_win_ds_dynlink.h"
PaWinDsDSoundEntryPoints paWinDsDSoundEntryPoints = { 0, 0, 0, 0, 0, 0, 0 };
static HRESULT WINAPI DummyDirectSoundCreate(LPGUID lpcGuidDevice, LPDIRECTSOUND *ppDS, LPUNKNOWN pUnkOuter)
{
(void)lpcGuidDevice; /* unused parameter */
(void)ppDS; /* unused parameter */
(void)pUnkOuter; /* unused parameter */
return E_NOTIMPL;
}
static HRESULT WINAPI DummyDirectSoundEnumerateW(LPDSENUMCALLBACKW lpDSEnumCallback, LPVOID lpContext)
{
(void)lpDSEnumCallback; /* unused parameter */
(void)lpContext; /* unused parameter */
return E_NOTIMPL;
}
static HRESULT WINAPI DummyDirectSoundEnumerateA(LPDSENUMCALLBACKA lpDSEnumCallback, LPVOID lpContext)
{
(void)lpDSEnumCallback; /* unused parameter */
(void)lpContext; /* unused parameter */
return E_NOTIMPL;
}
static HRESULT WINAPI DummyDirectSoundCaptureCreate(LPGUID lpcGUID, LPDIRECTSOUNDCAPTURE *lplpDSC, LPUNKNOWN pUnkOuter)
{
(void)lpcGUID; /* unused parameter */
(void)lplpDSC; /* unused parameter */
(void)pUnkOuter; /* unused parameter */
return E_NOTIMPL;
}
static HRESULT WINAPI DummyDirectSoundCaptureEnumerateW(LPDSENUMCALLBACKW lpDSCEnumCallback, LPVOID lpContext)
{
(void)lpDSCEnumCallback; /* unused parameter */
(void)lpContext; /* unused parameter */
return E_NOTIMPL;
}
static HRESULT WINAPI DummyDirectSoundCaptureEnumerateA(LPDSENUMCALLBACKA lpDSCEnumCallback, LPVOID lpContext)
{
(void)lpDSCEnumCallback; /* unused parameter */
(void)lpContext; /* unused parameter */
return E_NOTIMPL;
}
void PaWinDs_InitializeDSoundEntryPoints(void)
{
paWinDsDSoundEntryPoints.hInstance_ = LoadLibrary("dsound.dll");
if( paWinDsDSoundEntryPoints.hInstance_ != NULL )
{
paWinDsDSoundEntryPoints.DirectSoundCreate =
(HRESULT (WINAPI *)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN))
GetProcAddress( paWinDsDSoundEntryPoints.hInstance_, "DirectSoundCreate" );
if( paWinDsDSoundEntryPoints.DirectSoundCreate == NULL )
paWinDsDSoundEntryPoints.DirectSoundCreate = DummyDirectSoundCreate;
paWinDsDSoundEntryPoints.DirectSoundEnumerateW =
(HRESULT (WINAPI *)(LPDSENUMCALLBACKW, LPVOID))
GetProcAddress( paWinDsDSoundEntryPoints.hInstance_, "DirectSoundEnumerateW" );
if( paWinDsDSoundEntryPoints.DirectSoundEnumerateW == NULL )
paWinDsDSoundEntryPoints.DirectSoundEnumerateW = DummyDirectSoundEnumerateW;
paWinDsDSoundEntryPoints.DirectSoundEnumerateA =
(HRESULT (WINAPI *)(LPDSENUMCALLBACKA, LPVOID))
GetProcAddress( paWinDsDSoundEntryPoints.hInstance_, "DirectSoundEnumerateA" );
if( paWinDsDSoundEntryPoints.DirectSoundEnumerateA == NULL )
paWinDsDSoundEntryPoints.DirectSoundEnumerateA = DummyDirectSoundEnumerateA;
paWinDsDSoundEntryPoints.DirectSoundCaptureCreate =
(HRESULT (WINAPI *)(LPGUID, LPDIRECTSOUNDCAPTURE *, LPUNKNOWN))
GetProcAddress( paWinDsDSoundEntryPoints.hInstance_, "DirectSoundCaptureCreate" );
if( paWinDsDSoundEntryPoints.DirectSoundCaptureCreate == NULL )
paWinDsDSoundEntryPoints.DirectSoundCaptureCreate = DummyDirectSoundCaptureCreate;
paWinDsDSoundEntryPoints.DirectSoundCaptureEnumerateW =
(HRESULT (WINAPI *)(LPDSENUMCALLBACKW, LPVOID))
GetProcAddress( paWinDsDSoundEntryPoints.hInstance_, "DirectSoundCaptureEnumerateW" );
if( paWinDsDSoundEntryPoints.DirectSoundCaptureEnumerateW == NULL )
paWinDsDSoundEntryPoints.DirectSoundCaptureEnumerateW = DummyDirectSoundCaptureEnumerateW;
paWinDsDSoundEntryPoints.DirectSoundCaptureEnumerateA =
(HRESULT (WINAPI *)(LPDSENUMCALLBACKA, LPVOID))
GetProcAddress( paWinDsDSoundEntryPoints.hInstance_, "DirectSoundCaptureEnumerateA" );
if( paWinDsDSoundEntryPoints.DirectSoundCaptureEnumerateA == NULL )
paWinDsDSoundEntryPoints.DirectSoundCaptureEnumerateA = DummyDirectSoundCaptureEnumerateA;
}
else
{
/* initialize with dummy entry points to make live easy when ds isn't present */
paWinDsDSoundEntryPoints.DirectSoundCreate = DummyDirectSoundCreate;
paWinDsDSoundEntryPoints.DirectSoundEnumerateW = DummyDirectSoundEnumerateW;
paWinDsDSoundEntryPoints.DirectSoundEnumerateA = DummyDirectSoundEnumerateA;
paWinDsDSoundEntryPoints.DirectSoundCaptureCreate = DummyDirectSoundCaptureCreate;
paWinDsDSoundEntryPoints.DirectSoundCaptureEnumerateW = DummyDirectSoundCaptureEnumerateW;
paWinDsDSoundEntryPoints.DirectSoundCaptureEnumerateA = DummyDirectSoundCaptureEnumerateA;
}
}
void PaWinDs_TerminateDSoundEntryPoints(void)
{
if( paWinDsDSoundEntryPoints.hInstance_ != NULL )
{
/* ensure that we crash reliably if the entry points arent initialised */
paWinDsDSoundEntryPoints.DirectSoundCreate = 0;
paWinDsDSoundEntryPoints.DirectSoundEnumerateW = 0;
paWinDsDSoundEntryPoints.DirectSoundEnumerateA = 0;
paWinDsDSoundEntryPoints.DirectSoundCaptureCreate = 0;
paWinDsDSoundEntryPoints.DirectSoundCaptureEnumerateW = 0;
paWinDsDSoundEntryPoints.DirectSoundCaptureEnumerateA = 0;
FreeLibrary( paWinDsDSoundEntryPoints.hInstance_ );
paWinDsDSoundEntryPoints.hInstance_ = NULL;
}
}

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#ifndef INCLUDED_PA_DSOUND_DYNLINK_H
#define INCLUDED_PA_DSOUND_DYNLINK_H
/*
* Interface for dynamically loading directsound and providing a dummy
* implementation if it isn't present.
*
* Author: Ross Bencina (some portions Phil Burk & Robert Marsanyi
*
* For PortAudio Portable Real-Time Audio Library
* For more information see: http://www.portaudio.com
* Copyright (c) 1999-2006 Phil Burk, Robert Marsanyi and Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
/* on Borland compilers, WIN32 doesn't seem to be defined by default, which
breaks DSound.h. Adding the define here fixes the problem. - rossb. */
#ifdef __BORLANDC__
#if !defined(WIN32)
#define WIN32
#endif
#endif
/*
We are only using DX3 in here, no need to polute the namespace - davidv
*/
#define DIRECTSOUND_VERSION 0x0300
#include <DSound.h>
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
typedef struct
{
HINSTANCE hInstance_;
HRESULT (WINAPI *DirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
HRESULT (WINAPI *DirectSoundEnumerateW)(LPDSENUMCALLBACKW, LPVOID);
HRESULT (WINAPI *DirectSoundEnumerateA)(LPDSENUMCALLBACKA, LPVOID);
HRESULT (WINAPI *DirectSoundCaptureCreate)(LPGUID, LPDIRECTSOUNDCAPTURE *, LPUNKNOWN);
HRESULT (WINAPI *DirectSoundCaptureEnumerateW)(LPDSENUMCALLBACKW, LPVOID);
HRESULT (WINAPI *DirectSoundCaptureEnumerateA)(LPDSENUMCALLBACKA, LPVOID);
}PaWinDsDSoundEntryPoints;
extern PaWinDsDSoundEntryPoints paWinDsDSoundEntryPoints;
void PaWinDs_InitializeDSoundEntryPoints(void);
void PaWinDs_TerminateDSoundEntryPoints(void);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* INCLUDED_PA_DSOUND_DYNLINK_H */

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/*
* recplay.c
* Phil Burk
* Minimal record and playback test.
*
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#ifndef __STDC__
/* #include <getopt.h> */
#endif /* __STDC__ */
#include <fcntl.h>
#ifdef __STDC__
#include <string.h>
#else /* __STDC__ */
#include <strings.h>
#endif /* __STDC__ */
#include <sys/soundcard.h>
#define NUM_BYTES (64*1024)
#define BLOCK_SIZE (4*1024)
#define AUDIO "/dev/dsp"
char buffer[NUM_BYTES];
int audioDev = 0;
main (int argc, char *argv[])
{
int numLeft;
char *ptr;
int num;
int samplesize;
/********** RECORD ********************/
/* Open audio device. */
audioDev = open (AUDIO, O_RDONLY, 0);
if (audioDev == -1)
{
perror (AUDIO);
exit (-1);
}
/* Set to 16 bit samples. */
samplesize = 16;
ioctl(audioDev, SNDCTL_DSP_SAMPLESIZE, &samplesize);
if (samplesize != 16)
{
perror("Unable to set the sample size.");
exit(-1);
}
/* Record in blocks */
printf("Begin recording.\n");
numLeft = NUM_BYTES;
ptr = buffer;
while( numLeft >= BLOCK_SIZE )
{
if ( (num = read (audioDev, ptr, BLOCK_SIZE)) < 0 )
{
perror (AUDIO);
exit (-1);
}
else
{
printf("Read %d bytes\n", num);
ptr += num;
numLeft -= num;
}
}
close( audioDev );
/********** PLAYBACK ********************/
/* Open audio device for writing. */
audioDev = open (AUDIO, O_WRONLY, 0);
if (audioDev == -1)
{
perror (AUDIO);
exit (-1);
}
/* Set to 16 bit samples. */
samplesize = 16;
ioctl(audioDev, SNDCTL_DSP_SAMPLESIZE, &samplesize);
if (samplesize != 16)
{
perror("Unable to set the sample size.");
exit(-1);
}
/* Play in blocks */
printf("Begin playing.\n");
numLeft = NUM_BYTES;
ptr = buffer;
while( numLeft >= BLOCK_SIZE )
{
if ( (num = write (audioDev, ptr, BLOCK_SIZE)) < 0 )
{
perror (AUDIO);
exit (-1);
}
else
{
printf("Wrote %d bytes\n", num);
ptr += num;
numLeft -= num;
}
}
close( audioDev );
}

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Notes about WDM-KS host API
---------------------------
Status history
--------------
10th November 2005:
Made following changes:
* OpenStream: Try all PaSampleFormats internally if the the chosen
format is not supported natively. This fixed several problems
with soundcards that soundcards that did not take kindly to
using 24-bit 3-byte formats.
* OpenStream: Make the minimum framesPerHostIBuffer (and framesPerHostOBuffer)
the default frameSize for the playback/recording pin.
* ProcessingThread: Added a switch to only call PaUtil_EndBufferProcessing
if the total input frames equals the total output frames
5th September 2004:
This is the first public version of the code. It should be considered
an alpha release with zero guarantee not to crash on any particular
system. So far it has only been tested in the author's development
environment, which means a Win2k/SP2 PIII laptop with integrated
SoundMAX driver and USB Tascam US-428 compiled with both MinGW
(GCC 3.3) and MSVC++6 using the MS DirectX 9 SDK.
It has been most widely tested with the MinGW build, with most of the
test programs (particularly paqa_devs and paqa_errs) passing.
There are some notable failures: patest_out_underflow and both of the
blocking I/O tests (as blocking I/O is not implemented).
At this point the code needs to be tested with a much wider variety
of configurations and feedback provided from testers regarding
both working and failing cases.
What is the WDM-KS host API?
----------------------------
PortAudio for Windows currently has 3 functional host implementations.
MME uses the oldest Windows audio API which does not offer good
play/record latency.
DirectX improves this, but still imposes a penalty
of 10s of milliseconds due to the system mixing of streams from
multiple applications.
ASIO offers very good latency, but requires special drivers which are
not always available for cheaper audio hardware. Also, when ASIO
drivers are available, they are not always so robust because they
bypass all of the standardised Windows device driver architecture
and hit the hardware their own way.
Alternatively there are a couple of free (but closed source) ASIO
implementations which connect to the lower level Windows
"Kernel Streaming" API, but again these require special installation
by the user, and can be limited in functionality or difficult to use.
This is where the PortAudio "WDM-KS" host implementation comes in.
It directly connects PortAudio to the same Kernel Streaming API which
those ASIO bridges use. This avoids the mixing penatly of DirectX,
giving at least as good latency as any ASIO driver, but it has the
advantage of working with ANY Windows audio hardware which is available
through the normal MME/DirectX routes without the user requiring
any additional device drivers to be installed, and allowing all
device selection to be done through the normal PortAudio API.
Note that in general you should only be using this host API if your
application has a real requirement for very low latency audio (<20ms),
either because you are generating sounds in real-time based upon
user input, or you a processing recorded audio in real time.
The only thing to be aware of is that using the KS interface will
block that device from being used by the rest of system through
the higher level APIs, or conversely, if the system is using
a device, the KS API will not be able to use it. MS recommend that
you should keep the device open only when your application has focus.
In PortAudio terms, this means having a stream Open on a WDMKS device.
Usage
-----
To add the WDMKS backend to your program which is already using
PortAudio, you must undefine PA_NO_WDMKS from your build file,
and include the pa_win_wdmks\pa_win_wdmks.c into your build.
The file should compile in both C and C++.
You will need a DirectX SDK installed on your system for the
ks.h and ksmedia.h header files.
You will need to link to the system "setupapi" library.
Note that if you use MinGW, you will get more warnings from
the DX header files when using GCC(C), and still a few warnings
with G++(CPP).

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/*
* $Id$
* Portable Audio I/O Library Windows initialization table
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
Mac OS host API initialization function table.
*/
#include "pa_hostapi.h"
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
PaError PaSkeleton_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
PaError PaMacCore_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
PaError PaMacSm_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
PaError PaJack_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
PaError PaMacAsio_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
#ifdef __cplusplus
}
#endif /* __cplusplus */
PaUtilHostApiInitializer *paHostApiInitializers[] =
{
#ifdef PA_USE_COREAUDIO
PaMacCore_Initialize,
#endif
#ifdef PA_USE_SM
PaMacSm_Initialize,
#endif
#ifdef PA_USE_JACK
PaJack_Initialize,
#endif
#ifdef PA_USE_ASIO
PaMacAsio_Initialize,
#endif
PaSkeleton_Initialize, /* just for testing */
0 /* NULL terminated array */
};
int paDefaultHostApiIndex = 0;

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/*
* $Id$
* Portable Audio I/O Library UNIX initialization table
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "pa_hostapi.h"
PaError PaJack_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
PaError PaAlsa_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
PaError PaOSS_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
/* Added for IRIX, Pieter, oct 2, 2003: */
PaError PaSGI_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
/* Linux AudioScience HPI */
PaError PaAsiHpi_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
PaUtilHostApiInitializer *paHostApiInitializers[] =
{
#ifdef PA_USE_OSS
PaOSS_Initialize,
#endif
#ifdef PA_USE_ALSA
PaAlsa_Initialize,
#endif
#ifdef PA_USE_JACK
PaJack_Initialize,
#endif
/* Added for IRIX, Pieter, oct 2, 2003: */
#ifdef PA_USE_SGI
PaSGI_Initialize,
#endif
#ifdef PA_USE_ASIHPI
PaAsiHpi_Initialize,
#endif
0 /* NULL terminated array */
};
int paDefaultHostApiIndex = 0;

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/*
* $Id$
* Portable Audio I/O Library
* UNIX platform-specific support functions
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2000 Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <pthread.h>
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#include <sys/time.h>
#include <assert.h>
#include <string.h> /* For memset */
#include <math.h>
#include <errno.h>
#include "pa_util.h"
#include "pa_unix_util.h"
/*
Track memory allocations to avoid leaks.
*/
#if PA_TRACK_MEMORY
static int numAllocations_ = 0;
#endif
void *PaUtil_AllocateMemory( long size )
{
void *result = malloc( size );
#if PA_TRACK_MEMORY
if( result != NULL ) numAllocations_ += 1;
#endif
return result;
}
void PaUtil_FreeMemory( void *block )
{
if( block != NULL )
{
free( block );
#if PA_TRACK_MEMORY
numAllocations_ -= 1;
#endif
}
}
int PaUtil_CountCurrentlyAllocatedBlocks( void )
{
#if PA_TRACK_MEMORY
return numAllocations_;
#else
return 0;
#endif
}
void Pa_Sleep( long msec )
{
#ifdef HAVE_NANOSLEEP
struct timespec req = {0}, rem = {0};
PaTime time = msec / 1.e3;
req.tv_sec = (time_t)time;
assert(time - req.tv_sec < 1.0);
req.tv_nsec = (long)((time - req.tv_sec) * 1.e9);
nanosleep(&req, &rem);
/* XXX: Try sleeping the remaining time (contained in rem) if interrupted by a signal? */
#else
while( msec > 999 ) /* For OpenBSD and IRIX, argument */
{ /* to usleep must be < 1000000. */
usleep( 999000 );
msec -= 999;
}
usleep( msec * 1000 );
#endif
}
/* *** NOT USED YET: ***
static int usePerformanceCounter_;
static double microsecondsPerTick_;
*/
void PaUtil_InitializeClock( void )
{
/* TODO */
}
PaTime PaUtil_GetTime( void )
{
#ifdef HAVE_CLOCK_GETTIME
struct timespec tp;
clock_gettime(CLOCK_REALTIME, &tp);
return (PaTime)(tp.tv_sec + tp.tv_nsec / 1.e9);
#else
struct timeval tv;
gettimeofday( &tv, NULL );
return (PaTime) tv.tv_usec / 1000000. + tv.tv_sec;
#endif
}
PaError PaUtil_InitializeThreading( PaUtilThreading *threading )
{
(void) paUtilErr_;
return paNoError;
}
void PaUtil_TerminateThreading( PaUtilThreading *threading )
{
}
PaError PaUtil_StartThreading( PaUtilThreading *threading, void *(*threadRoutine)(void *), void *data )
{
pthread_create( &threading->callbackThread, NULL, threadRoutine, data );
return paNoError;
}
PaError PaUtil_CancelThreading( PaUtilThreading *threading, int wait, PaError *exitResult )
{
PaError result = paNoError;
void *pret;
if( exitResult )
*exitResult = paNoError;
/* Only kill the thread if it isn't in the process of stopping (flushing adaptation buffers) */
if( !wait )
pthread_cancel( threading->callbackThread ); /* XXX: Safe to call this if the thread has exited on its own? */
pthread_join( threading->callbackThread, &pret );
#ifdef PTHREAD_CANCELED
if( pret && PTHREAD_CANCELED != pret )
#else
/* !wait means the thread may have been canceled */
if( pret && wait )
#endif
{
if( exitResult )
*exitResult = *(PaError *) pret;
free( pret );
}
return result;
}
/* Threading */
/* paUnixMainThread
* We have to be a bit careful with defining this global variable,
* as explained below. */
#ifdef __apple__
/* apple/gcc has a "problem" with global vars and dynamic libs.
Initializing it seems to fix the problem.
Described a bit in this thread:
http://gcc.gnu.org/ml/gcc/2005-06/msg00179.html
*/
pthread_t paUnixMainThread = 0;
#else
/*pthreads are opaque. We don't know that asigning it an int value
always makes sense, so we don't initialize it unless we have to.*/
pthread_t paUnixMainThread = 0;
#endif
PaError PaUnixThreading_Initialize()
{
paUnixMainThread = pthread_self();
return paNoError;
}
#if 0
PaError PaUnixThread_Initialize( PaUnixThread* self )
{
th->watchdogRunning = 0;
th->rtSched = 0;
th->callbackTime = 0;
th->callbackCpuTime = 0;
th->useWatchdog = 1;
th->throttledSleepTime = 0;
th->cpuLoadMeasurer = clm;
th->rtPrio = (sched_get_priority_max( SCHED_FIFO ) - sched_get_priority_min( SCHED_FIFO )) / 2
+ sched_get_priority_min( SCHED_FIFO );
}
#endif
PaError PaUnixThread_New( PaUnixThread* self, void* (*threadFunc)( void* ), void* threadArg, PaTime waitForChild )
{
PaError result = paNoError;
pthread_attr_t attr;
int started = 0;
memset( self, 0, sizeof (PaUnixThread) );
PaUnixMutex_Initialize( &self->mtx );
PA_ASSERT_CALL( pthread_cond_init( &self->cond, NULL ), 0 );
self->parentWaiting = 0 != waitForChild;
/* Spawn thread */
#if 0 && defined _POSIX_MEMLOCK && (_POSIX_MEMLOCK != -1)
if( th->rtSched )
{
if( mlockall( MCL_CURRENT | MCL_FUTURE ) < 0 )
{
int savedErrno = errno; /* In case errno gets overwritten */
assert( savedErrno != EINVAL ); /* Most likely a programmer error */
PA_UNLESS( (savedErrno == EPERM), paInternalError );
PA_DEBUG(( "%s: Failed locking memory\n", __FUNCTION__ ));
}
else
PA_DEBUG(( "%s: Successfully locked memory\n", __FUNCTION__ ));
}
#endif
PA_UNLESS( !pthread_attr_init( &attr ), paInternalError );
/* Priority relative to other processes */
PA_UNLESS( !pthread_attr_setscope( &attr, PTHREAD_SCOPE_SYSTEM ), paInternalError );
PA_UNLESS( !pthread_create( &self->thread, &attr, threadFunc, threadArg ), paInternalError );
started = 1;
#if 0
if( th->rtSched )
{
if( th->useWatchdog )
{
int err;
struct sched_param wdSpm = { 0 };
/* Launch watchdog, watchdog sets callback thread priority */
int prio = PA_MIN( th->rtPrio + 4, sched_get_priority_max( SCHED_FIFO ) );
wdSpm.sched_priority = prio;
PA_UNLESS( !pthread_attr_init( &attr ), paInternalError );
PA_UNLESS( !pthread_attr_setinheritsched( &attr, PTHREAD_EXPLICIT_SCHED ), paInternalError );
PA_UNLESS( !pthread_attr_setscope( &attr, PTHREAD_SCOPE_SYSTEM ), paInternalError );
PA_UNLESS( !pthread_attr_setschedpolicy( &attr, SCHED_FIFO ), paInternalError );
PA_UNLESS( !pthread_attr_setschedparam( &attr, &wdSpm ), paInternalError );
if( (err = pthread_create( &th->watchdogThread, &attr, &WatchdogFunc, th )) )
{
PA_UNLESS( err == EPERM, paInternalError );
/* Permission error, go on without realtime privileges */
PA_DEBUG(( "Failed bumping priority\n" ));
}
else
{
int policy;
th->watchdogRunning = 1;
PA_ENSURE_SYSTEM( pthread_getschedparam( th->watchdogThread, &policy, &wdSpm ), 0 );
/* Check if priority is right, policy could potentially differ from SCHED_FIFO (but that's alright) */
if( wdSpm.sched_priority != prio )
{
PA_DEBUG(( "Watchdog priority not set correctly (%d)\n", wdSpm.sched_priority ));
PA_ENSURE( paInternalError );
}
}
}
else
PA_ENSURE( BoostPriority( th ) );
}
#endif
if( self->parentWaiting )
{
PaTime till;
struct timespec ts;
int res = 0;
PaTime now;
PA_ENSURE( PaUnixMutex_Lock( &self->mtx ) );
/* Wait for stream to be started */
now = PaUtil_GetTime();
till = now + waitForChild;
while( self->parentWaiting && !res )
{
if( waitForChild > 0 )
{
ts.tv_sec = (time_t) floor( till );
ts.tv_nsec = (long) ((till - floor( till )) * 1e9);
res = pthread_cond_timedwait( &self->cond, &self->mtx.mtx, &ts );
}
else
{
res = pthread_cond_wait( &self->cond, &self->mtx.mtx );
}
}
PA_ENSURE( PaUnixMutex_Unlock( &self->mtx ) );
PA_UNLESS( !res || ETIMEDOUT == res, paInternalError );
PA_DEBUG(( "%s: Waited for %g seconds for stream to start\n", __FUNCTION__, PaUtil_GetTime() - now ));
if( ETIMEDOUT == res )
{
PA_ENSURE( paTimedOut );
}
}
end:
return result;
error:
if( started )
{
PaUnixThread_Terminate( self, 0, NULL );
}
goto end;
}
PaError PaUnixThread_Terminate( PaUnixThread* self, int wait, PaError* exitResult )
{
PaError result = paNoError;
void* pret;
if( exitResult )
{
*exitResult = paNoError;
}
#if 0
if( watchdogExitResult )
*watchdogExitResult = paNoError;
if( th->watchdogRunning )
{
pthread_cancel( th->watchdogThread );
PA_ENSURE_SYSTEM( pthread_join( th->watchdogThread, &pret ), 0 );
if( pret && pret != PTHREAD_CANCELED )
{
if( watchdogExitResult )
*watchdogExitResult = *(PaError *) pret;
free( pret );
}
}
#endif
/* Only kill the thread if it isn't in the process of stopping (flushing adaptation buffers) */
/* TODO: Make join time out */
self->stopRequested = wait;
if( !wait )
{
PA_DEBUG(( "%s: Canceling thread %d\n", __FUNCTION__, self->thread ));
/* XXX: Safe to call this if the thread has exited on its own? */
pthread_cancel( self->thread );
}
PA_DEBUG(( "%s: Joining thread %d\n", __FUNCTION__, self->thread ));
PA_ENSURE_SYSTEM( pthread_join( self->thread, &pret ), 0 );
if( pret && PTHREAD_CANCELED != pret )
{
if( exitResult )
{
*exitResult = *(PaError*)pret;
}
free( pret );
}
error:
PA_ASSERT_CALL( PaUnixMutex_Terminate( &self->mtx ), paNoError );
PA_ASSERT_CALL( pthread_cond_destroy( &self->cond ), 0 );
return result;
}
PaError PaUnixThread_PrepareNotify( PaUnixThread* self )
{
PaError result = paNoError;
PA_UNLESS( self->parentWaiting, paInternalError );
PA_ENSURE( PaUnixMutex_Lock( &self->mtx ) );
self->locked = 1;
error:
return result;
}
PaError PaUnixThread_NotifyParent( PaUnixThread* self )
{
PaError result = paNoError;
PA_UNLESS( self->parentWaiting, paInternalError );
if( !self->locked )
{
PA_ENSURE( PaUnixMutex_Lock( &self->mtx ) );
self->locked = 1;
}
self->parentWaiting = 0;
pthread_cond_signal( &self->cond );
PA_ENSURE( PaUnixMutex_Unlock( &self->mtx ) );
self->locked = 0;
error:
return result;
}
int PaUnixThread_StopRequested( PaUnixThread* self )
{
return self->stopRequested;
}
PaError PaUnixMutex_Initialize( PaUnixMutex* self )
{
PaError result = paNoError;
PA_ASSERT_CALL( pthread_mutex_init( &self->mtx, NULL ), 0 );
return result;
}
PaError PaUnixMutex_Terminate( PaUnixMutex* self )
{
PaError result = paNoError;
PA_ASSERT_CALL( pthread_mutex_destroy( &self->mtx ), 0 );
return result;
}
/** Lock mutex.
*
* We're disabling thread cancellation while the thread is holding a lock, so mutexes are
* properly unlocked at termination time.
*/
PaError PaUnixMutex_Lock( PaUnixMutex* self )
{
PaError result = paNoError;
int oldState;
PA_ENSURE_SYSTEM( pthread_setcancelstate( PTHREAD_CANCEL_DISABLE, &oldState ), 0 );
PA_ENSURE_SYSTEM( pthread_mutex_lock( &self->mtx ), 0 );
error:
return result;
}
/** Unlock mutex.
*
* Thread cancellation is enabled again after the mutex is properly unlocked.
*/
PaError PaUnixMutex_Unlock( PaUnixMutex* self )
{
PaError result = paNoError;
int oldState;
PA_ENSURE_SYSTEM( pthread_mutex_unlock( &self->mtx ), 0 );
PA_ENSURE_SYSTEM( pthread_setcancelstate( PTHREAD_CANCEL_ENABLE, &oldState ), 0 );
error:
return result;
}
#if 0
/* Threading utility struct */
typedef struct PaAlsaThreading
{
pthread_t watchdogThread;
pthread_t callbackThread;
int watchdogRunning;
int rtSched;
int rtPrio;
int useWatchdog;
unsigned long throttledSleepTime;
volatile PaTime callbackTime;
volatile PaTime callbackCpuTime;
PaUtilCpuLoadMeasurer *cpuLoadMeasurer;
} PaAlsaThreading;
static void OnWatchdogExit( void *userData )
{
PaAlsaThreading *th = (PaAlsaThreading *) userData;
struct sched_param spm = { 0 };
assert( th );
PA_ASSERT_CALL( pthread_setschedparam( th->callbackThread, SCHED_OTHER, &spm ), 0 ); /* Lower before exiting */
PA_DEBUG(( "Watchdog exiting\n" ));
}
static PaError BoostPriority( PaAlsaThreading *th )
{
PaError result = paNoError;
struct sched_param spm = { 0 };
spm.sched_priority = th->rtPrio;
assert( th );
if( pthread_setschedparam( th->callbackThread, SCHED_FIFO, &spm ) != 0 )
{
PA_UNLESS( errno == EPERM, paInternalError ); /* Lack permission to raise priority */
PA_DEBUG(( "Failed bumping priority\n" ));
result = 0;
}
else
result = 1; /* Success */
error:
return result;
}
static void *WatchdogFunc( void *userData )
{
PaError result = paNoError, *pres = NULL;
int err;
PaAlsaThreading *th = (PaAlsaThreading *) userData;
unsigned intervalMsec = 500;
const PaTime maxSeconds = 3.; /* Max seconds between callbacks */
PaTime timeThen = PaUtil_GetTime(), timeNow, timeElapsed, cpuTimeThen, cpuTimeNow, cpuTimeElapsed;
double cpuLoad, avgCpuLoad = 0.;
int throttled = 0;
assert( th );
/* Execute OnWatchdogExit when exiting */
pthread_cleanup_push( &OnWatchdogExit, th );
/* Boost priority of callback thread */
PA_ENSURE( result = BoostPriority( th ) );
if( !result )
{
/* Boost failed, might as well exit */
pthread_exit( NULL );
}
cpuTimeThen = th->callbackCpuTime;
{
int policy;
struct sched_param spm = { 0 };
pthread_getschedparam( pthread_self(), &policy, &spm );
PA_DEBUG(( "%s: Watchdog priority is %d\n", __FUNCTION__, spm.sched_priority ));
}
while( 1 )
{
double lowpassCoeff = 0.9, lowpassCoeff1 = 0.99999 - lowpassCoeff;
/* Test before and after in case whatever underlying sleep call isn't interrupted by pthread_cancel */
pthread_testcancel();
Pa_Sleep( intervalMsec );
pthread_testcancel();
if( PaUtil_GetTime() - th->callbackTime > maxSeconds )
{
PA_DEBUG(( "Watchdog: Terminating callback thread\n" ));
/* Tell thread to terminate */
err = pthread_kill( th->callbackThread, SIGKILL );
pthread_exit( NULL );
}
PA_DEBUG(( "%s: PortAudio reports CPU load: %g\n", __FUNCTION__, PaUtil_GetCpuLoad( th->cpuLoadMeasurer ) ));
/* Check if we should throttle, or unthrottle :P */
cpuTimeNow = th->callbackCpuTime;
cpuTimeElapsed = cpuTimeNow - cpuTimeThen;
cpuTimeThen = cpuTimeNow;
timeNow = PaUtil_GetTime();
timeElapsed = timeNow - timeThen;
timeThen = timeNow;
cpuLoad = cpuTimeElapsed / timeElapsed;
avgCpuLoad = avgCpuLoad * lowpassCoeff + cpuLoad * lowpassCoeff1;
/*
if( throttled )
PA_DEBUG(( "Watchdog: CPU load: %g, %g\n", avgCpuLoad, cpuTimeElapsed ));
*/
if( PaUtil_GetCpuLoad( th->cpuLoadMeasurer ) > .925 )
{
static int policy;
static struct sched_param spm = { 0 };
static const struct sched_param defaultSpm = { 0 };
PA_DEBUG(( "%s: Throttling audio thread, priority %d\n", __FUNCTION__, spm.sched_priority ));
pthread_getschedparam( th->callbackThread, &policy, &spm );
if( !pthread_setschedparam( th->callbackThread, SCHED_OTHER, &defaultSpm ) )
{
throttled = 1;
}
else
PA_DEBUG(( "Watchdog: Couldn't lower priority of audio thread: %s\n", strerror( errno ) ));
/* Give other processes a go, before raising priority again */
PA_DEBUG(( "%s: Watchdog sleeping for %lu msecs before unthrottling\n", __FUNCTION__, th->throttledSleepTime ));
Pa_Sleep( th->throttledSleepTime );
/* Reset callback priority */
if( pthread_setschedparam( th->callbackThread, SCHED_FIFO, &spm ) != 0 )
{
PA_DEBUG(( "%s: Couldn't raise priority of audio thread: %s\n", __FUNCTION__, strerror( errno ) ));
}
if( PaUtil_GetCpuLoad( th->cpuLoadMeasurer ) >= .99 )
intervalMsec = 50;
else
intervalMsec = 100;
/*
lowpassCoeff = .97;
lowpassCoeff1 = .99999 - lowpassCoeff;
*/
}
else if( throttled && avgCpuLoad < .8 )
{
intervalMsec = 500;
throttled = 0;
/*
lowpassCoeff = .9;
lowpassCoeff1 = .99999 - lowpassCoeff;
*/
}
}
pthread_cleanup_pop( 1 ); /* Execute cleanup on exit */
error:
/* Shouldn't get here in the normal case */
/* Pass on error code */
pres = malloc( sizeof (PaError) );
*pres = result;
pthread_exit( pres );
}
static void CallbackUpdate( PaAlsaThreading *th )
{
th->callbackTime = PaUtil_GetTime();
th->callbackCpuTime = PaUtil_GetCpuLoad( th->cpuLoadMeasurer );
}
#endif
/*
static void *CanaryFunc( void *userData )
{
const unsigned intervalMsec = 1000;
PaUtilThreading *th = (PaUtilThreading *) userData;
while( 1 )
{
th->canaryTime = PaUtil_GetTime();
pthread_testcancel();
Pa_Sleep( intervalMsec );
}
pthread_exit( NULL );
}
*/

179
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#ifndef PA_UNIX_UTIL_H
#define PA_UNIX_UTIL_H
#include "pa_cpuload.h"
#include <assert.h>
#include <pthread.h>
#include <signal.h>
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
#define PA_MIN(x,y) ( (x) < (y) ? (x) : (y) )
#define PA_MAX(x,y) ( (x) > (y) ? (x) : (y) )
/* Utilize GCC branch prediction for error tests */
#if defined __GNUC__ && __GNUC__ >= 3
#define UNLIKELY(expr) __builtin_expect( (expr), 0 )
#else
#define UNLIKELY(expr) (expr)
#endif
#define STRINGIZE_HELPER(expr) #expr
#define STRINGIZE(expr) STRINGIZE_HELPER(expr)
#define PA_UNLESS(expr, code) \
do { \
if( UNLIKELY( (expr) == 0 ) ) \
{ \
PaUtil_DebugPrint(( "Expression '" #expr "' failed in '" __FILE__ "', line: " STRINGIZE( __LINE__ ) "\n" )); \
result = (code); \
goto error; \
} \
} while (0);
static PaError paUtilErr_; /* Used with PA_ENSURE */
/* Check PaError */
#define PA_ENSURE(expr) \
do { \
if( UNLIKELY( (paUtilErr_ = (expr)) < paNoError ) ) \
{ \
PaUtil_DebugPrint(( "Expression '" #expr "' failed in '" __FILE__ "', line: " STRINGIZE( __LINE__ ) "\n" )); \
result = paUtilErr_; \
goto error; \
} \
} while (0);
#define PA_ASSERT_CALL(expr, success) \
paUtilErr_ = (expr); \
assert( success == paUtilErr_ );
#define PA_ENSURE_SYSTEM(expr, success) \
do { \
if( UNLIKELY( (paUtilErr_ = (expr)) != success ) ) \
{ \
/* PaUtil_SetLastHostErrorInfo should only be used in the main thread */ \
if( pthread_equal(pthread_self(), paUnixMainThread) ) \
{ \
PaUtil_SetLastHostErrorInfo( paALSA, paUtilErr_, strerror( paUtilErr_ ) ); \
} \
PaUtil_DebugPrint( "Expression '" #expr "' failed in '" __FILE__ "', line: " STRINGIZE( __LINE__ ) "\n" ); \
result = paUnanticipatedHostError; \
goto error; \
} \
} while( 0 );
typedef struct {
pthread_t callbackThread;
} PaUtilThreading;
PaError PaUtil_InitializeThreading( PaUtilThreading *threading );
void PaUtil_TerminateThreading( PaUtilThreading *threading );
PaError PaUtil_StartThreading( PaUtilThreading *threading, void *(*threadRoutine)(void *), void *data );
PaError PaUtil_CancelThreading( PaUtilThreading *threading, int wait, PaError *exitResult );
/* State accessed by utility functions */
/*
void PaUnix_SetRealtimeScheduling( int rt );
void PaUtil_InitializeThreading( PaUtilThreading *th, PaUtilCpuLoadMeasurer *clm );
PaError PaUtil_CreateCallbackThread( PaUtilThreading *th, void *(*CallbackThreadFunc)( void * ), PaStream *s );
PaError PaUtil_KillCallbackThread( PaUtilThreading *th, PaError *exitResult );
void PaUtil_CallbackUpdate( PaUtilThreading *th );
*/
extern pthread_t paUnixMainThread;
typedef struct
{
pthread_mutex_t mtx;
} PaUnixMutex;
PaError PaUnixMutex_Initialize( PaUnixMutex* self );
PaError PaUnixMutex_Terminate( PaUnixMutex* self );
PaError PaUnixMutex_Lock( PaUnixMutex* self );
PaError PaUnixMutex_Unlock( PaUnixMutex* self );
typedef struct
{
pthread_t thread;
int parentWaiting;
int stopRequested;
int locked;
PaUnixMutex mtx;
pthread_cond_t cond;
volatile sig_atomic_t stopRequest;
} PaUnixThread;
/** Initialize global threading state.
*/
PaError PaUnixThreading_Initialize();
/** Perish, passing on eventual error code.
*
* A thin wrapper around pthread_exit, will automatically pass on any error code to the joining thread.
* If the result indicates an error, i.e. it is not equal to paNoError, this function will automatically
* allocate a pointer so the error is passed on with pthread_exit. If the result indicates that all is
* well however, only a NULL pointer will be handed to pthread_exit. Thus, the joining thread should
* check whether a non-NULL result pointer is obtained from pthread_join and make sure to free it.
* @param result: The error code to pass on to the joining thread.
*/
#define PaUnixThreading_EXIT(result) \
do { \
PaError* pres = NULL; \
if( paNoError != (result) ) \
{ \
pres = malloc( sizeof (PaError) ); \
*pres = (result); \
} \
pthread_exit( pres ); \
} while (0);
/** Spawn a thread.
*
* Intended for spawning the callback thread from the main thread. This function can even block (for a certain
* time or indefinitely) untill notified by the callback thread (using PaUnixThread_NotifyParent), which can be
* useful in order to make sure that callback has commenced before returning from Pa_StartStream.
* @param threadFunc: The function to be executed in the child thread.
* @param waitForChild: If not 0, wait for child thread to call PaUnixThread_NotifyParent. Less than 0 means
* wait for ever, greater than 0 wait for the specified time.
* @return: If timed out waiting on child, paTimedOut.
*/
PaError PaUnixThread_New( PaUnixThread* self, void* (*threadFunc)( void* ), void* threadArg, PaTime waitForChild );
/** Terminate thread.
*
* @param wait: If true, request that background thread stop and wait untill it does, else cancel it.
* @param exitResult: If non-null this will upon return contain the exit status of the thread.
*/
PaError PaUnixThread_Terminate( PaUnixThread* self, int wait, PaError* exitResult );
/** Prepare to notify waiting parent thread.
*
* An internal lock must be held before the parent is notified in PaUnixThread_NotifyParent, call this to
* acquire it beforehand.
* @return: If parent is not waiting, paInternalError.
*/
PaError PaUnixThread_PrepareNotify( PaUnixThread* self );
/** Notify waiting parent thread.
*
* @return: If parent timed out waiting, paTimedOut. If parent was never waiting, paInternalError.
*/
PaError PaUnixThread_NotifyParent( PaUnixThread* self );
/** Has the parent thread requested this thread to stop?
*/
int PaUnixThread_StopRequested( PaUnixThread* self );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif

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/*
* $Id$
* Portable Audio I/O Library Windows initialization table
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
Win32 host API initialization function table.
@todo Consider using PA_USE_WMME etc instead of PA_NO_WMME. This is what
the Unix version does, we should consider being consistent.
*/
#include "pa_hostapi.h"
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
PaError PaSkeleton_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
PaError PaWinMme_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
PaError PaWinDs_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
PaError PaAsio_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
PaError PaWinWdm_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
PaError PaWinWasapi_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
#ifdef __cplusplus
}
#endif /* __cplusplus */
PaUtilHostApiInitializer *paHostApiInitializers[] =
{
#ifndef PA_NO_WMME
PaWinMme_Initialize,
#endif
#ifndef PA_NO_DS
PaWinDs_Initialize,
#endif
#ifndef PA_NO_ASIO
PaAsio_Initialize,
#endif
/*
#ifndef PA_NO_WASAPI
PaWinWasapi_Initialize,
#endif
#ifndef PA_NO_WDMKS
PaWinWdm_Initialize,
#endif
*/
PaSkeleton_Initialize, /* just for testing */
0 /* NULL terminated array */
};
int paDefaultHostApiIndex = 0;

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/*
* $Id$
* Portable Audio I/O Library
* Win32 platform-specific support functions
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2000 Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** @file
Win32 platform-specific support functions.
@todo Implement workaround for QueryPerformanceCounter() skipping forward
bug. (see msdn kb Q274323).
*/
#include <windows.h>
#include <mmsystem.h> /* for timeGetTime() */
#include "pa_util.h"
/*
Track memory allocations to avoid leaks.
*/
#if PA_TRACK_MEMORY
static int numAllocations_ = 0;
#endif
void *PaUtil_AllocateMemory( long size )
{
void *result = GlobalAlloc( GPTR, size );
#if PA_TRACK_MEMORY
if( result != NULL ) numAllocations_ += 1;
#endif
return result;
}
void PaUtil_FreeMemory( void *block )
{
if( block != NULL )
{
GlobalFree( block );
#if PA_TRACK_MEMORY
numAllocations_ -= 1;
#endif
}
}
int PaUtil_CountCurrentlyAllocatedBlocks( void )
{
#if PA_TRACK_MEMORY
return numAllocations_;
#else
return 0;
#endif
}
void Pa_Sleep( long msec )
{
Sleep( msec );
}
static int usePerformanceCounter_;
static double secondsPerTick_;
void PaUtil_InitializeClock( void )
{
LARGE_INTEGER ticksPerSecond;
if( QueryPerformanceFrequency( &ticksPerSecond ) != 0 )
{
usePerformanceCounter_ = 1;
secondsPerTick_ = 1.0 / (double)ticksPerSecond.QuadPart;
}
else
{
usePerformanceCounter_ = 0;
}
}
double PaUtil_GetTime( void )
{
LARGE_INTEGER time;
if( usePerformanceCounter_ )
{
/* FIXME:
according to this knowledge-base article, QueryPerformanceCounter
can skip forward by seconds!
http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q274323&
it may be better to use the rtdsc instruction using inline asm,
however then a method is needed to calculate a ticks/seconds ratio.
*/
QueryPerformanceCounter( &time );
return time.QuadPart * secondsPerTick_;
}
else
{
return timeGetTime() * .001;
}
}

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#ifndef PA_X86_PLAIN_CONVERTERS_H
#define PA_X86_PLAIN_CONVERTERS_H
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/**
@brief Install optimised converter functions suitable for all IA32 processors
*/
void PaUtil_InitializeX86PlainConverters( void );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_X86_PLAIN_CONVERTERS_H */