2006-09-06 14:09:05 -04:00
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subroutine wsjt1(d,jz0,istart,samfacin,FileID,ndepth,MinSigdB,
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+ NQRN,DFTolerance,MouseButton,NClearAve,
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+ Mode,NFreeze,NAFC,NZap,mode65,
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+ MyCall,HisCall,HisGrid,neme,nsked,ntx2,s2,
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+ ps0,npkept,lumsg,basevb,rmspower,nslim2,psavg,ccf,Nseg,
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+ MouseDF,NAgain,LDecoded,nspecial,ndf,ss1,ss2)
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parameter (NP2=1024*1024)
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integer*2 d(jz0) !Buffer for raw one-byte data
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integer istart !Starting location in original d() array
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character FileID*40 !Name of file being processed
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integer MinSigdB !Minimum ping strength, dB
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integer NQRN !QRN rejection parameter
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integer DFTolerance !Defines DF search range
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integer NSyncOK !Set to 1 if JT65 file synchronized OK
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character*12 mycall
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character*12 hiscall
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character*6 hisgrid
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real ps0(431) !Spectrum of best ping
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integer npkept !Number of pings kept and decoded
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integer lumsg !Logical unit for decoded.txt
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real basevb !Baseline signal level, dB
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integer nslim2 !Minimum strength for single-tone pings, dB
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real psavg(450) !Average spectrum of the whole file
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integer Nseg !First or second Tx sequence?
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integer MouseDF !Freeze position for DF
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logical pick !True if this is a mouse-picked ping
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logical stbest !True if the best decode was Single-Tone
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logical STfound !True if at least one ST decode
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logical LDecoded !True if anything was decoded
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real s2(64,3100) !2D spectral array
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real ccf(-5:540) !X-cor function in JT65 mode (blue line)
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real red(512)
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real ss1(-224:224) !Magenta curve (for JT65 shorthands)
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real ss2(-224:224) !Orange curve (for JT65 shorthands)
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real yellow(216)
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real yellow0(216)
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real fzap(200)
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integer resample
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real*8 samfacin,samratio
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real dat2(NP2)
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character msg3*3
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character cfile6*6
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logical lcum
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integer indx(100)
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character*90 line
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common/avecom/dat(NP2),labdat,jza,modea
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common/ccom/nline,tping(100),line(100)
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common/limcom/ nslim2a
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common/clipcom/ nclip
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save
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lcum=.true.
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jz=jz0
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modea=Mode
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nclip=NQRN-5
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nslim2a=nclip
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MinWidth=40 !Minimum width of pings, ms
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call zero(psavg,450)
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rewind 11
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rewind 12
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do i=1,40
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if(FileID(i:i).eq.'.') go to 3
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enddo
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i=4
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3 ia=max(1,i-6)
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cfile6=FileID(ia:i-1)
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nline=0
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ndiag=0
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! If file "/wsjt.reg" exists, set ndiag=1
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open(16,file='/wsjt.reg',status='old',err=4)
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ndiag=1
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close(16)
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4 if(jz.gt.655360) jz=655360
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if(mode.eq.4 .and. jz.gt.330750) jz=330750 !### Fix this!
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sum=0.
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do j=1,jz !Convert raw data from i*2 to real, remove DC
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dat(j)=0.1*d(j)
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sum=sum + dat(j)
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enddo
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ave=sum/jz
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samratio=1.d0/samfacin
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if(samratio.eq.1.d0) then
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do j=1,jz
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dat(j)=dat(j)-ave
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enddo
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else
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do j=1,jz
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dat2(j)=dat(j)-ave
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enddo
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#if (USE_PORTAUDIO==1) || defined(Win32)
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ierr=resample(dat2,dat,samratio,jz)
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if(ierr.ne.0) print*,'Resample error.',samratio
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#endif
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endif
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if(ndiag.ne.0 .and. nclip.lt.0) then
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C Intentionally degrade SNR by -nclip dB.
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sq=0.
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do i=1,jz
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sq=sq + dat(i)**2
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enddo
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p0=sq/jz
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p1=p0*10.0**(-0.1*nclip)
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dnoise=sqrt(4*(p1-p0))
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idum=-1
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do i=1,jz
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dat(i)=dat(i) + dnoise*gran(idum)
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enddo
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endif
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if(mode.ne.2 .and. nzap.ne.0) then
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nfrz=NFreeze
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if(mode.eq.1) nfrz=0
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if(jz.gt.100000) call avesp2(dat,jz,2,mode,nfrz,MouseDF,
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+ DFTolerance,fzap)
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nadd=1
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call bzap(dat,jz,nadd,mode,fzap)
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endif
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sq=0.
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do j=1,jz !Compute power level for whole array
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sq=sq + dat(j)**2
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enddo
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avesq=sq/jz
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basevb=dB(avesq) - 44 !Base power level to send back to GUI
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if(avesq.eq.0) go to 900
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nz=600
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nstep=jz/nz
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sq=0.
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k=0
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do j=1,nz
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sum=0.
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do n=1,nstep
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k=k+1
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sum=sum+dat(k)**2
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enddo
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sum=sum/nstep
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sq=sq + (sum-avesq)**2
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enddo
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rmspower=sqrt(sq/nz)
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pick=.false.
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if(istart.gt.1) pick=.true. !This is a mouse-picked decoding
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if(.not.pick .and. (basevb.lt.-15.0 .or. basevb.gt.20.0)) goto 900
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nchan=64 !Save 64 spectral channels
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nstep=221 !Set step size to ~20 ms
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nz=jz/nstep - 1 !# of spectra to compute
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if(.not.pick) then
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MouseButton=0
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jza=jz
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labdat=labdat+1
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endif
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tbest=0.
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NsyncOK=0
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! If we're in JT65 mode, call the decode65 routines.
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if(mode.eq.2) then
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! if(rmspower.gt.34000.0) go to 900 !Reject very noisy data
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! Check for a JT65 shorthand message
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nstest=0
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if(ntx2.ne.1) call short65(dat,jz,NFreeze,MouseDF,
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+ DFTolerance,mode65,nspecial,nstest,dfsh,iderrsh,
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+ idriftsh,snrsh,ss1,ss2,nwsh)
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! Lowpass filter and decimate by 2
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call lpf1(dat,jz,jz2)
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jz=jz2
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nadd=1
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fzap(1)=0.
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if(nzap.eq.1) call avesp2(dat,jz,nadd,mode,NFreeze,MouseDF,
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+ DFTolerance,fzap)
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if(nzap.eq.1.and.nstest.eq.0) call bzap(dat,jz,nadd,mode,fzap)
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i=index(MyCall,char(0))
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if(i.le.0) i=index(MyCall,' ')
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mycall=MyCall(1:i-1)//' '
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i=index(HisCall,char(0))
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if(i.le.0) i=index(HisCall,' ')
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hiscall=HisCall(1:i-1)//' '
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! Offset data by about 1 s.
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if(jz.ge.126*2048) call wsjt65(dat(4097),jz-4096,cfile6,
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+ NClearAve,MinSigdB,DFTolerance,NFreeze,NAFC,mode65,Nseg,
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+ MouseDF,NAgain,ndepth,neme,nsked,
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+ mycall,hiscall,hisgrid,lumsg,lcum,nspecial,ndf,
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+ nstest,dfsh,snrsh,
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+ NSyncOK,ccf,psavg,ndiag,nwsh)
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goto 900
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endif
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! If we're in JT6M mode, call the 6M decoding routines.
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if(mode.eq.4) then
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do i=1,jz !### Why is it level-sensitive?
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dat(i)=dat(i)/25.0
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enddo
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! For waterfall plot
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call spec2d(dat,jz,nstep,s2,nchan,nz,psavg,sigma)
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if(sigma.lt.0.0) basevb=-99.0
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if(jz/11025.0.lt.3.9 .or. sigma.lt.0.0) go to 900
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f0=1076.66
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if(NFreeze.eq.1) f0=1076.66 + MouseDF
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f00=f0
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call syncf0(dat,jz,NFreeze,DFTolerance,jstart,f0,smax)
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call synct(dat,jz,jstart,f0,smax)
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call syncf1(dat,jz,jstart,f0,NFreeze,DFTolerance,smax,red)
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do i=1,512
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ccf(i-6)=dB(red(i))
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enddo
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df=11025./256.
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do i=1,64
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sum=0.
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do k=8*i-7,8*i
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sum=sum+red(k)
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enddo
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psavg(i)=5.0*sum
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fac=1.0
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freq=i*df
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if(freq.gt.2500.0) fac=((freq-2500.)/20.0)**(-1.0)
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psavg(i)=fac*psavg(i)
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psavg(i+64)=0.001
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enddo
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jz=jz-jstart+1
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nslim=MinSigdB
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NFixLen=0
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C Call the decoder if DF is in range or Freeze is off.
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if(NFreeze.eq.0 .or.
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+ abs(f0-f00).lt.float(DFTolerance)) then
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call decode6m(dat(jstart),jz,cfile6,nslim,istart,
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+ NFixLen,lcum,f0,lumsg,npkept,yellow)
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endif
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if(pick) then
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do i=1,216
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ps0(i)=yellow0(i)
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enddo
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else
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ps0(216)=yellow(216)
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yellow0(216)=yellow(216)
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do i=1,215
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ps0(i)=2*yellow(i)
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yellow0(i)=ps0(i)
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enddo
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endif
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goto 800
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endif
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! We're in FSK441 mode. Compute the 2D spectrum.
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df=11025.0/256.0 !FFT resolution ~43 Hz
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dtbuf=nstep/11025.0
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stlim=nslim2 !Single-tone threshold
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call spec2d(dat,jz,nstep,s2,nchan,nz,psavg,sigma)
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if(sigma.lt.0.0) basevb=-99.0
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if(sigma.lt.0.0) go to 900
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nline0=nline
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STfound=.false.
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npkept=0
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C Look for single-tone messages
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if((.not.pick) .or. MouseButton.eq.1) then
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call stdecode(s2,nchan,nz,sigma,dtbuf,df,stlim,
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+ DFTolerance,cfile6,pick,istart)
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endif
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if(nline.gt.nline0) STfound=.true. !ST message(s) found
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C Now the multi-tone decoding
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call mtdecode(dat,jz,nz,MinSigdB,MinWidth,
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+ NQRN,DFTolerance,istart,pick,cfile6,ps0)
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npkept=nline !Number of pings that were kept
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smax=0.
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stbest=.false.
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if(npkept.gt.0) then
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call indexx(npkept,tping,indx) !Merge the ST and MT decodes
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do i=1,npkept
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j=indx(i)
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if(pick .and. STFound .and.
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+ line(j)(29:31).eq.' ') goto 10
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write(lumsg,1050) line(j) !Write to decoded.txt
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1050 format(a79)
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if(lcum) write(21,1050) line(j) !Write to ALL.TXT
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read(line(j),1060) sig,msg3
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1060 format(16x,f3.0,9x,a3)
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if(sig.gt.smax) then
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smax=sig
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tbest=tping(j)
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stbest = (msg3.ne.' ')
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endif
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10 enddo
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endif
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dt=1.0/11025.0 !Compute spectrum for pink curve
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if(stbest) then
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jj=nint(tbest/dt)
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call spec441(dat(jj),1102,ps0,f0)
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endif
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800 continue
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call s2shape(s2,nchan,nz,tbest)
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900 LDecoded = ((NSyncOK.gt.0) .or. npkept.gt.0)
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end file 11
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call flushqqq(11)
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call flushqqq(12)
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call flushqqq(21)
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return
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end
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