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https://github.com/saitohirga/WSJT-X.git
synced 2024-11-03 16:01:18 -05:00
624bcc3cbd
2. Tweaked code that measures sampling rates (in fivehz and fivehztx) so that it works well with both PortAudio and bare ALSA. 3. Added a "Using PortAudio" message to a2d.f90. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/trunk@84 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
210 lines
5.0 KiB
Fortran
210 lines
5.0 KiB
Fortran
subroutine fivehz
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! Called at interrupt level from the PortAudio callback routine.
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! For nspb=2048 the callback rate is nfsample/nspb = 5.38 Hz.
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! Thus, we should be able to control the timing of T/R sequence events
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! here to within about 0.2 s.
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! Do not do anything very time consuming in this routine!!
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! Disk I/O is a bad idea. Writing to stdout (for diagnostic purposes)
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! seems to be OK.
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#ifdef Win32
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use dflib
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use dfport
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#endif
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real*8 tstart,tstop,t60
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logical first,txtime,debug
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integer ptt
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integer TxOKz
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real*8 fs,fsample,tt,tt0,u
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include 'gcom1.f90'
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include 'gcom2.f90'
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data first/.true./,nc0/1/,nc1/1/
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save
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n1=time()
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n2=mod(n1,86400)
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tt=n1-n2+tsec-0.1d0*ndsec
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if(first) then
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rxdelay=0.2
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txdelay=0.2
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tlatency=3*2048/11025.0
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first=.false.
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iptt=0
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ntr0=-99
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debug=.false.
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rxdone=.false.
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ibuf00=-99
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ncall=-1
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tt0=tt
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u=0.1d0
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fsample=11025.d0
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maxms=0
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mfsample=110250
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endif
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if(txdelay.lt.0.2d0) txdelay=0.2d0
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! Measure average sampling frequency over a recent interval
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ncall=ncall+1
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if(ncall.eq.9) tt0=tt
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if(ncall.ge.10 .and. mod(ncall,2).eq.1) then
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fs=(ncall-9)*2048.d0/(tt-tt0)
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fsample=u*fs + (1.d0-u)*fsample
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mfsample=nint(10.d0*fsample)
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endif
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if(trperiod.le.0) trperiod=30
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tx1=0.0 !Time to start a TX sequence
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tx2=trperiod-(tlatency+txdelay) !Time to turn TX off
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if(mode(1:4).eq.'JT65') then
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if(nwave.lt.126*4096) nwave=126*4096
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tx2=nwave/11025.0
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endif
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if(TxFirst.eq.0) then
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tx1=tx1+trperiod
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tx2=tx2+trperiod
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endif
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t=mod(Tsec,2.d0*trperiod)
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txtime = t.ge.tx1 .and. t.lt.tx2
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! If we're transmitting, freeze the input buffer pointers where they were.
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receiving=1
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if(((txtime .and. (lauto.eq.1)) .or. TxOK.eq.1 .or. transmitting.eq.1) &
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.and. (mute.eq.0)) then
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receiving=0
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ibuf=ibuf000
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iwrite=iwrite000
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endif
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ibuf000=ibuf
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iwrite000=iwrite
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nsec=Tsec
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ntr=mod(nsec/trperiod,2) !ntr=0 in 1st sequence, 1 in 2nd
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if(ntr.ne.ntr0) then
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ibuf0=ibuf !Start of new sequence, save ibuf
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! if(mode(1:4).ne.'JT65') then
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! ibuf0=ibuf0+3 !So we don't copy our own Tx
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! if(ibuf0.gt.1024) ibuf0=ibuf0-1024
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! endif
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ntime=time() !Save start time
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if(mantx.eq.1 .and. iptt.eq.1) then
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mantx=0
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TxOK=0
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endif
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endif
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! Switch PTT line and TxOK appropriately
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if(lauto.eq.1) then
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if(txtime .and. iptt.eq.0 .and. &
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mute.eq.0) i1=ptt(nport,1,iptt) !Raise PTT
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if(.not.txtime .or. mute.eq.1) TxOK=0 !Lower TxOK
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else
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if(mantx.eq.1 .and. iptt.eq.0 .and. &
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mute.eq.0) i2=ptt(nport,1,iptt) !Raise PTT
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if(mantx.eq.0 .or. mute.eq.1) TxOK=0 !Lower TxOK
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endif
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! Calculate Tx waveform as needed
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if((iptt.eq.1 .and. iptt0.eq.0) .or. nrestart.eq.1) then
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call wsjtgen
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nrestart=0
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endif
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! If PTT was just raised, start a countdown for raising TxOK:
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nc1a=txdelay/0.18576
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if(nc1a.lt.2) nc1a=2
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if(mode(1:4).eq.'JT65') nc1a=2 !No extra delay for JT65
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if(iptt.eq.1 .and. iptt0.eq.0) nc1=-nc1a
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if(nc1.le.0) nc1=nc1+1
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if(nc1.eq.0) TxOK=1 ! We are transmitting
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! If TxOK was just lowered, start a countdown for lowering PTT:
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nc0a=txdelay/0.18576
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if(nc0a.lt.4) nc0a=4
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if(TxOK.eq.0 .and. TxOKz.eq.1 .and. iptt.eq.1) nc0=-nc0a
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if(nc0.le.0) nc0=nc0+1
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if(nc0.eq.0) i3=ptt(nport,0,iptt)
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if(iptt.eq.0 .and.TxOK.eq.0) then
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sending=" "
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sendingsh=0
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endif
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nbufs=ibuf-ibuf0
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if(nbufs.lt.0) nbufs=nbufs+1024
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tdata=nbufs*2048.0/11025.0
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if(mode(1:4).eq.'JT65' .and. monitoring.eq.1 .and. tdata.gt.53.0 &
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.and. ibuf0.ne.ibuf00) then
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rxdone=.true.
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ibuf00=ibuf0
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endif
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! if(ndebug.ne.0) then
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! t60=mod(tsec,60.d0)
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! if(iptt.ne.iptt0) then
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! if(iptt.eq.1) tstart=tsec
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! if(iptt.eq.0) write(*,1101) tsec-tstop,t60
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!1101 format('Delay from TxOFF to PTT was',f6.2,' s at t=',f6.2)
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! endif
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! if(TxOK.ne.TxOKz) then
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! if(TxOK.eq.0) tstop=tsec
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! if(TxOK.eq.1) write(*,1102) tsec-tstart,t60
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!1102 format('Delay from PTT to TxON was ',f6.2,' s at t=',f6.2)
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! endif
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! endif
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iptt0=iptt
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TxOKz=TxOK
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ntr0=ntr
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return
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end subroutine fivehz
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subroutine fivehztx
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! Called at interrupt level from the PortAudio output callback.
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#ifdef Win32
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use dflib
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use dfport
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#endif
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logical first
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real*8 fs,fsample,tt,tt0,u
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include 'gcom1.f90'
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data first/.true./
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save
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n1=time()
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n2=mod(n1,86400)
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tt=n1-n2+tsec-0.1d0*ndsec
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if(first) then
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first=.false.
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ncall=-1
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fsample=11025.d0
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nsec0=-999
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u=0.1d0
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mfsample2=110250
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tt0=tt
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endif
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ncall=ncall+1
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if(ncall.eq.9) tt0=tt
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if(ncall.ge.10 .and. mod(ncall,2).eq.1) then
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fs=(ncall-9)*2048.d0/(tt-tt0)
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fsample=u*fs + (1.d0-u)*fsample
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mfsample2=nint(10.d0*fsample)
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endif
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return
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end subroutine fivehztx
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