WSJT-X/portaudio-v19/bindings/cpp/source/portaudiocpp/System.cxx

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#include "portaudiocpp/System.hxx"
#include <cstddef>
#include <cassert>
#include "portaudiocpp/HostApi.hxx"
#include "portaudiocpp/Device.hxx"
#include "portaudiocpp/Stream.hxx"
#include "portaudiocpp/Exception.hxx"
#include "portaudiocpp/SystemHostApiIterator.hxx"
#include "portaudiocpp/SystemDeviceIterator.hxx"
namespace portaudio
{
// -----------------------------------------------------------------------------------
// Static members:
System *System::instance_ = NULL;
int System::initCount_ = 0;
HostApi **System::hostApis_ = NULL;
Device **System::devices_ = NULL;
Device *System::nullDevice_ = NULL;
// -----------------------------------------------------------------------------------
int System::version()
{
return Pa_GetVersion();
}
const char *System::versionText()
{
return Pa_GetVersionText();
}
void System::initialize()
{
++initCount_;
if (initCount_ == 1)
{
// Create singleton:
assert(instance_ == NULL);
instance_ = new System();
// Initialize the PortAudio system:
{
PaError err = Pa_Initialize();
if (err != paNoError)
throw PaException(err);
}
// Create and populate device array:
{
int numDevices = instance().deviceCount();
devices_ = new Device*[numDevices];
for (int i = 0; i < numDevices; ++i)
devices_[i] = new Device(i);
}
// Create and populate host api array:
{
int numHostApis = instance().hostApiCount();
hostApis_ = new HostApi*[numHostApis];
for (int i = 0; i < numHostApis; ++i)
hostApis_[i] = new HostApi(i);
}
// Create null device:
nullDevice_ = new Device(paNoDevice);
}
}
void System::terminate()
{
PaError err = paNoError;
if (initCount_ == 1)
{
// Destroy null device:
delete nullDevice_;
// Destroy host api array:
{
if (hostApis_ != NULL)
{
int numHostApis = instance().hostApiCount();
for (int i = 0; i < numHostApis; ++i)
delete hostApis_[i];
delete[] hostApis_;
hostApis_ = NULL;
}
}
// Destroy device array:
{
if (devices_ != NULL)
{
int numDevices = instance().deviceCount();
for (int i = 0; i < numDevices; ++i)
delete devices_[i];
delete[] devices_;
devices_ = NULL;
}
}
// Terminate the PortAudio system:
assert(instance_ != NULL);
err = Pa_Terminate();
// Destroy singleton:
delete instance_;
instance_ = NULL;
}
if (initCount_ > 0)
--initCount_;
if (err != paNoError)
throw PaException(err);
}
System &System::instance()
{
assert(exists());
return *instance_;
}
bool System::exists()
{
return (instance_ != NULL);
}
// -----------------------------------------------------------------------------------
System::HostApiIterator System::hostApisBegin()
{
System::HostApiIterator tmp;
tmp.ptr_ = &hostApis_[0]; // begin (first element)
return tmp;
}
System::HostApiIterator System::hostApisEnd()
{
int count = hostApiCount();
System::HostApiIterator tmp;
tmp.ptr_ = &hostApis_[count]; // end (one past last element)
return tmp;
}
HostApi &System::defaultHostApi()
{
PaHostApiIndex defaultHostApi = Pa_GetDefaultHostApi();
if (defaultHostApi < 0)
throw PaException(defaultHostApi);
return *hostApis_[defaultHostApi];
}
HostApi &System::hostApiByTypeId(PaHostApiTypeId type)
{
PaHostApiIndex index = Pa_HostApiTypeIdToHostApiIndex(type);
if (index < 0)
throw PaException(index);
return *hostApis_[index];
}
HostApi &System::hostApiByIndex(PaHostApiIndex index)
{
if (index < 0 || index >= hostApiCount())
throw PaException(paInternalError);
return *hostApis_[index];
}
int System::hostApiCount()
{
PaHostApiIndex count = Pa_GetHostApiCount();
if (count < 0)
throw PaException(count);
return count;
}
// -----------------------------------------------------------------------------------
System::DeviceIterator System::devicesBegin()
{
DeviceIterator tmp;
tmp.ptr_ = &devices_[0];
return tmp;
}
System::DeviceIterator System::devicesEnd()
{
int count = deviceCount();
DeviceIterator tmp;
tmp.ptr_ = &devices_[count];
return tmp;
}
//////
/// Returns the System's default input Device, or the null Device if none
/// was available.
//////
Device &System::defaultInputDevice()
{
PaDeviceIndex index = Pa_GetDefaultInputDevice();
return deviceByIndex(index);
}
//////
/// Returns the System's default output Device, or the null Device if none
/// was available.
//////
Device &System::defaultOutputDevice()
{
PaDeviceIndex index = Pa_GetDefaultOutputDevice();
return deviceByIndex(index);
}
//////
/// Returns the Device for the given index.
/// Will throw a paInternalError equivalent PaException if the given index
/// is out of range.
//////
Device &System::deviceByIndex(PaDeviceIndex index)
{
if (index < -1 || index >= deviceCount())
{
throw PaException(paInternalError);
}
if (index == -1)
return System::instance().nullDevice();
return *devices_[index];
}
int System::deviceCount()
{
PaDeviceIndex count = Pa_GetDeviceCount();
if (count < 0)
throw PaException(count);
return count;
}
Device &System::nullDevice()
{
return *nullDevice_;
}
// -----------------------------------------------------------------------------------
void System::sleep(long msec)
{
Pa_Sleep(msec);
}
int System::sizeOfSample(PaSampleFormat format)
{
PaError err = Pa_GetSampleSize(format);
if (err < 0)
{
throw PaException(err);
return 0;
}
return err;
}
// -----------------------------------------------------------------------------------
System::System()
{
// (left blank intentionally)
}
System::~System()
{
// (left blank intentionally)
}
// -----------------------------------------------------------------------------------
} // namespace portaudio