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. parameter (NTMAX=120) parameter (NMAX=NTMAX*12000) !Total sample intervals per 30 minutes parameter (NDMAX=NTMAX*1500) !Sample intervals at 1500 Hz rate parameter (NSMAX=1365) !Max length of saved spectra integer*4 ihdr(11) real*4 s(NSMAX) real*4 ccfred(NSMAX) logical*1 lstrong(0:1023) integer*2 id2 complex c0 character*80 arg,infile common/jt9com/ss(184,NSMAX),savg(NSMAX),c0(NDMAX),id2(NMAX),nutc,ndiskdat, & ntr,mousefqso,newdat,nfa,nfb,ntol,kin,nzhsym,nsynced,ndecoded common/tracer/limtrace,lu nargs=iargc() if(nargs.lt.1) then print*,'Usage: jt9 TRperiod ndepth file1 [file2 ...]' print*,' Reads data from *.wav files.' print*,'' print*,' jt9 -s' print*,' Gets data from shared memory region.' go to 999 endif call getarg(1,arg) if(arg(1:2).eq.'-s') then call jt9a go to 999 endif read(arg,*) ntrperiod call getarg(2,arg) read(arg,*) ndepth ifile1=3 limtrace=0 lu=12 nfa=1000 nfb=2000 mousefqso=1500 newdat=1 nb=0 nbslider=30 ndiskdat=1 do ifile=ifile1,nargs call getarg(ifile,infile) 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(ifile.eq.ifile1) then open(12,file='timer.out',status='unknown') call timer('jt9 ',0) endif ! do i=1,npts ! id2(i)=100.0*sin(6.283185307*1600.0*i/12000.0) ! enddo 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,nb,nbslider,pxdb, & s,ccfred,df3,ihsym,nzap,slimit,lstrong,npts8) call timer('symspec ',1) nhsym0=nhsym if(ihsym.ge.173) go to 10 endif enddo 10 close(10) call fillcom(nutc0,ndepth) call decoder(ss,c0,1) enddo call timer('jt9 ',1) call timer('jt9 ',101) go to 999 998 print*,'Cannot open file:' print*,infile 999 end program jt9