mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-30 16:18:54 -05:00
cd216964d2
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@2691 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
113 lines
3.0 KiB
Fortran
113 lines
3.0 KiB
Fortran
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.
|
|
|
|
! NB: For unknown reason, ***MUST*** be compiled by g95 with -O0 !!!
|
|
|
|
character*80 arg,infile
|
|
parameter (NMAX=1800*12000) !Total sample intervals per 30 minutes
|
|
parameter (NDMAX=1800*1500) !Sample intervals at 1500 Hz rate
|
|
parameter (NSMAX=22000) !Max length of saved spectra
|
|
integer*4 ihdr(11)
|
|
real*4 s(NSMAX)
|
|
real*4 red(NSMAX)
|
|
logical*1 lstrong(0:1023)
|
|
integer*1 i1SoftSymbols(207)
|
|
character*22 msg
|
|
integer*2 id2
|
|
complex c0(NDMAX)
|
|
common/jt9com/ss(184,NSMAX),savg(NSMAX),id2(NMAX),nutc,ndiskdat, &
|
|
ntr,mousefqso,nagain,newdat,nfa,nfb,ntol,kin
|
|
|
|
nargs=iargc()
|
|
if(nargs.lt.1) then
|
|
print*,'Usage: jt9 TRperiod 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') go to 999
|
|
read(arg,*) ntrperiod
|
|
|
|
ifile1=2
|
|
|
|
nfa=1000
|
|
nfb=2000
|
|
ntol=500
|
|
nfqso=1500
|
|
newdat=1
|
|
nb=0
|
|
nbslider=100
|
|
|
|
do ifile=ifile1,nargs
|
|
call getarg(ifile,infile)
|
|
open(10,file=infile,access='stream',status='old',err=998)
|
|
read(10) ihdr
|
|
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) nsps=6912
|
|
if(ntrperiod.eq.2) nsps=15360
|
|
if(ntrperiod.eq.5) nsps=40960
|
|
if(ntrperiod.eq.10) nsps=82944
|
|
if(ntrperiod.eq.30) nsps=252000
|
|
if(nsps.eq.0) stop 'Error: bad TRprtiod'
|
|
|
|
kstep=nsps/2
|
|
tstep=kstep/12000.0
|
|
k=0
|
|
nhsym0=-999
|
|
npts=(60*ntrperiod-6)*12000
|
|
|
|
! do i=1,npts
|
|
! id2(i)=100.0*sin(6.283185307*1046.875*i/12000.0)
|
|
! enddo
|
|
|
|
do iblk=1,npts/kstep
|
|
k=iblk*kstep
|
|
read(10,end=10) id2(k-kstep+1:k)
|
|
nhsym=(k-2048)/kstep
|
|
if(nhsym.ge.1 .and. nhsym.ne.nhsym0) then
|
|
! Emit signal readyForFFT
|
|
call symspec(k,ntrperiod,nsps,nb,nbslider,pxdb, &
|
|
s,red,df3,ihsym,nzap,slimit,lstrong,c0,npts8)
|
|
nhsym0=nhsym
|
|
if(ihsym.ge.184) go to 10
|
|
endif
|
|
enddo
|
|
|
|
10 close(10)
|
|
iz=1000.0/df3
|
|
! print*,'A',ihsym,nhsym,tstep,df3,ntol,nfqso
|
|
|
|
! Now do the decoding
|
|
nutc=nutc0
|
|
|
|
! Get sync, approx freq
|
|
call sync9(ss,tstep,df3,ntol,nfqso,sync,snr,fpk0,red)
|
|
! print*,'B',sync,fpk,npts8,nsps
|
|
call spec9(c0,npts8,nsps,fpk0,fpk,xdt,i1SoftSymbols)
|
|
call decode9(i1SoftSymbols,msg)
|
|
nsync=sync
|
|
nsnr=nint(snr)
|
|
width=0.0
|
|
write(*,1010) nutc,nsync,nsnr,xdt,1000.0+fpk,width,msg
|
|
1010 format(i4.4,i4,i5,f6.1,f8.2,f6.2,3x,a22)
|
|
|
|
! write(*,1010) nutc,sync,xdt,1000.0+fpk,msg
|
|
!1010 format(i4.4,3f7.1,2x,a22)
|
|
enddo
|
|
|
|
go to 999
|
|
|
|
998 print*,'Cannot open file:'
|
|
print*,infile
|
|
|
|
999 end program jt9
|