WSJT-X/lib/fast_decode.f90

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subroutine fast_decode(id2,narg,ntrperiod,bShMsgs,line, &
mycall_12,hiscall_12)
parameter (NMAX=30*12000)
integer*2 id2(NMAX)
integer*2 id2a(NMAX)
integer*2 id2b(NMAX)
integer narg(0:14)
logical*1 bShMsgs
real dat(30*12000)
complex cdat(262145),cdat2(262145)
real psavg(450)
logical pick,first
character*6 cfile6
character*80 line(100)
character*12 mycall_12,hiscall_12
character*6 mycall,hiscall
data first/.true./,nutca/0/,nutcb/0/
save npts,cdat,cdat2,id2a,id2b,nutca,nutcb
if(first) then
id2a=0
id2b=0
first=.false.
endif
mycall=mycall_12(1:6)
hiscall=hiscall_12(1:6)
nutc=narg(0)
ndat0=narg(1)
nsubmode=narg(2)
newdat=narg(3)
minsync=narg(4)
npick=narg(5)
t0=0.001*narg(6)
t1=0.001*narg(7)
tmid=0.5*(t0+t1)
maxlines=narg(8)
nmode=narg(9)
nrxfreq=narg(10)
ntol=narg(11)
nhashcalls=narg(12)
! print*,'A',nutc
line(1:100)(1:1)=char(0)
if(t0.gt.float(ntrperiod)) go to 900
if(t0.gt.t1) go to 900
if(nmode.eq.102) then
call fast9(id2,narg,line)
go to 900
else if(nmode.eq.104) then
! MSK144 mode
if(newdat.eq.1) then
id2b=id2a !Data for lower panel
id2a=id2 !Data for upper panel
nutcb=nutca
nutca=nutc
endif
ia=max(1,nint(t0*12000.0))
ib=nint(t1*12000.0)
if(ib.gt.ntrperiod*12000) ib=ntrperiod*12000
nz=ib-ia+1
! line(1)=char(0)
if(newdat.eq.1) then
! Full sequence of new data
! write(*,3001) newdat,npick,nutca
!3001 format(2i3,3i8)
call msk144_decode(id2a(ia),nz,nutca,0,mycall,hiscall, &
bShMsgs,ntol,t0,line)
go to 100
endif
if(npick.eq.1) then
! Pick-decode from upper panel
! write(*,3001) newdat,npick,nutc
call msk144_decode(id2(ia),nz,nutc,0,mycall,hiscall, &
bShMsgs,ntol,t0,line)
go to 100
endif
if(npick.eq.2) then
! Pick-decode from lower panel
! write(*,3001) newdat,npick,nutca
call msk144_decode(id2b(ia),nz,nutca,0,mycall,hiscall, &
bShMsgs,ntol,t0,line)
endif
100 continue
go to 900
endif
if(newdat.eq.1) then
cdat2=cdat
ndat=ndat0
call wav11(id2,ndat,dat)
ndat=min(ndat,30*11025)
call ana932(dat,ndat,cdat,npts) !Make downsampled analytic signal
endif
! Now cdat() is the downsampled analytic signal.
! New sample rate = fsample = BW = 11025 * (9/32) = 3100.78125 Hz
! NB: npts, nsps, etc., are all reduced by 9/32
write(cfile6,'(i6.6)') nutc
nfreeze=1
mousedf=0
mousebutton=0
mode4=1
if(nsubmode.eq.1) mode4=2
nafc=0
ndebug=0
t2=0.
ia=1
ib=npts
pick=.false.
if(npick.gt.0) then
pick=.true.
dt=1.0/11025.0 * (32.0/9.0)
ia=t0/dt + 1.
ib=t1/dt + 1.
t2=t0
endif
jz=ib-ia+1
line(1:100)(1:1)=char(0)
if(npick.eq.2) then
call iscat(cdat2(ia),jz,3,40,t2,pick,cfile6,minsync,ntol,NFreeze, &
MouseDF,mousebutton,mode4,nafc,ndebug,psavg,nmax,nlines,line)
else
call iscat(cdat(ia),jz,3,40,t2,pick,cfile6,minsync,ntol,NFreeze, &
MouseDF,mousebutton,mode4,nafc,ndebug,psavg,maxlines,nlines,line)
endif
900 return
end subroutine fast_decode