program jt9
! Decoder for JT9. Can run stand-alone, reading data from *.wav files;
! or as the back end of wsjt-x, with data placed in a shared memory region.
use options
use prog_args
use, intrinsic :: iso_c_binding
use FFTW3
include 'constants.f90'
integer(C_INT) iret
integer*4 ihdr(11)
real*4 s(NSMAX)
integer*2 id2
character c
character(len=500) optarg, infile
character wisfile*80
integer :: arglen,stat,offset,remain,mode=0,flow=200,fsplit=2700,fhigh=4007,nrxfreq=1500,ntrperiod=1,ndepth=1
logical :: shmem = .false., read_files = .false., have_args = .false., tx9 = .false., display_help = .false.
type (option) :: long_options(16) = [ &
option ('help', .false., 'h', 'Display this help message', ''), &
option ('shmem', .true., 's', 'Use shared memory for sample data', '<key>'), &
option ('tr-period', .true., 'p', 'Tx/Rx period, default=1', '<minutes>'), &
option ('executable-path', .true., 'e', 'Location of subordinate executables (KVASD) default="."', '<path>'), &
option ('data-path', .true., 'a', 'Location of writeable data files, detfault="."', '<path>'), &
option ('temp-path', .true., 't', 'Temporary files path, default="."', '<path>'), &
option ('lowest', .true., 'L', 'Lowest frequency decoded (JT65), default=200Hz', '<hertz>'), &
option ('highest', .true., 'H', 'Highest frequency decoded, default=4007Hz', '<hertz>'), &
option ('split', .true., 'S', 'Lowest JT9 frequency decoded, default=2700Hz', '<hertz>'), &
option ('rx-frequency', .true., 'f', 'Receive frequency offset, default=1500', '<hertz>'), &
option ('patience', .true., 'w', 'FFTW3 planing patience (0-4), default=1', '<patience>'), &
option ('fft-threads', .true., 'm', 'Number of threads to process large FFTs, default=1', '<number>'), &
option ('jt65', .false., '6', 'JT65 mode', ''), &
option ('jt9', .false., '9', 'JT9 mode', ''), &
option ('depth', .true., 'd', 'JT9 decoding depth (1-3), default=1', '<number>'), &
option ('tx-jt9', .false., 'T', 'Tx mode is JT9, default=JT65', '') ]
common/jt9com/ss(184,NSMAX),savg(NSMAX),id2(NMAX),nutc,ndiskdat,ntr, &
mousefqso,newdat,nfa,nfsplit,nfb,ntol,kin,nzhsym,nsynced,ndecoded
common/tracer/limtrace,lu
common/patience/npatience,nthreads
common/decstats/num65,numbm,numkv,num9,numfano,infile
data npatience/1/,nthreads/1/
do
call getopt('hs:e:a:r:m:p:d:f:w:t:96TL:S:H:',long_options,c,optarg,arglen,stat, &
offset,remain)
if (stat .ne. 0) then
exit
end if
have_args = .true.
select case (c)
case ('h')
display_help = .true.
case ('s')
shmem = .true.
shm_key = optarg(:arglen)
case ('e')
exe_dir = optarg(:arglen)
case ('a')
data_dir = optarg(:arglen)
case ('t')
temp_dir = optarg(:arglen)
case ('m')
read (optarg(:arglen), *) nthreads
case ('p')
read_files = .true.
read (optarg(:arglen), *) ntrperiod
case ('d')
read_files = .true.
read (optarg(:arglen), *) ndepth
case ('f')
read_files = .true.
read (optarg(:arglen), *) nrxfreq
case ('L')
read_files = .true.
read (optarg(:arglen), *) flow
case ('S')
read_files = .true.
read (optarg(:arglen), *) fsplit
case ('H')
read_files = .true.
read (optarg(:arglen), *) fhigh
case ('6')
read_files = .true.
if (mode.lt.65) mode = mode + 65
case ('9')
read_files = .true.
if (mode.lt.9.or.mode.eq.65) mode = mode + 9
case ('T')
read_files = .true.
tx9 = .true.
case ('w')
read (optarg(:arglen), *) npatience
end select
end do
if (display_help .or. .not. have_args .or. (stat .lt. 0 .or. (shmem .and. remain .gt. 0) &
.or. (read_files .and. remain .eq. 0) .or. &
(shmem .and. read_files))) then
print*,'Usage: jt9 -p <per> OPTIONS file1 [file2 ...]'
print*,' Reads data from *.wav files.'
print*,''
print*,' jt9 -s <key> [-w n] [-m n] [-e path] [-a path] [-t path]'
print*,' Gets data from shared memory region with key==<key>'
do i = 1, size (long_options)
print*,''
call long_options(i) % print (6)
end do
go to 999
endif
iret=fftwf_init_threads() !Initialize FFTW threading
call fftwf_plan_with_nthreads(1) !Default to 1 thread but use nthreads for the big ones
! Import FFTW wisdom, if available
wisfile=trim(data_dir)//'/jt9_wisdom.dat'// C_NULL_CHAR
iret=fftwf_import_wisdom_from_filename(wisfile)
num65=0
numbm=0
numkv=0
num9=0
numfano=0
if (shmem) then
call jt9a()
go to 999
endif
limtrace=0
lu=12
nflatten=0
do iarg = offset + 1, offset + remain
call get_command_argument (iarg, optarg, arglen)
infile = optarg(:arglen)
open(10,file=infile,access='stream',status='old',err=998)
read(10) ihdr
nutc0=ihdr(1) !Silence compiler warning
i1=index(infile,'.wav')
read(infile(i1-4:i1-1),*,err=1) nutc0
go to 2
1 nutc0=0
2 nsps=0
if(ntrperiod.eq.1) then
nsps=6912
nzhsym=173
else if(ntrperiod.eq.2) then
nsps=15360
nzhsym=178
else if(ntrperiod.eq.5) then
nsps=40960
nzhsym=172
else if(ntrperiod.eq.10) then
nsps=82944
nzhsym=171
else if(ntrperiod.eq.30) then
nsps=252000
nzhsym=167
endif
if(nsps.eq.0) stop 'Error: bad TRperiod'
kstep=nsps/2
k=0
nhsym0=-999
npts=(60*ntrperiod-6)*12000
if(iarg .eq. offset + 1) then
open(12,file=trim(data_dir)//'/timer.out',status='unknown')
call timer('jt9 ',0)
endif
id2=0 !??? Why is this necessary ???
do iblk=1,npts/kstep
k=iblk*kstep
call timer('read_wav',0)
read(10,end=10) id2(k-kstep+1:k)
call timer('read_wav',1)
nhsym=(k-2048)/kstep
if(nhsym.ge.1 .and. nhsym.ne.nhsym0) then
! Emit signal readyForFFT
ingain=0
call timer('symspec ',0)
call symspec(k,ntrperiod,nsps,ingain,nflatten,pxdb,s,df3,ihsym,npts8)
call timer('symspec ',1)
nhsym0=nhsym
if(ihsym.ge.173) go to 10
endif
enddo
10 close(10)
call fillcom(nutc0,ndepth,nrxfreq,mode,tx9,flow,fsplit,fhigh)
call decoder(ss,id2)
enddo
call timer('jt9 ',1)
call timer('jt9 ',101)
go to 999
998 print*,'Cannot open file:'
print*,infile
999 continue
! Output decoder statistics
write(12,1100) numbm,numkv,numbm+numkv,num65,numfano,num9
1100 format(58('-')/' BM KV JT65 Tries JT9 Tries'/ &
58('-')/6i8)
! Save wisdom and free memory
iret=fftwf_export_wisdom_to_filename(wisfile)
call four2a(a,-1,1,1,1)
call filbig(a,-1,1,0.0,0,0,0,0,0) !used for FFT plans
call fftwf_cleanup_threads()
call fftwf_cleanup()
end program jt9