mirror of https://github.com/saitohirga/WSJT-X.git
123 lines
3.1 KiB
Fortran
123 lines
3.1 KiB
Fortran
!---------------------------------------------------- recvpkt
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subroutine recvpkt(iarg)
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! Receive timf2 packets from Linrad, stuff data into id().
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! This routine runs in a background thread and will never return.
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#ifdef Win32
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use dflib
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#endif
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parameter (NSZ=2*60*96000)
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real*8 d8(NSZ)
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integer*1 userx_no,iusb
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integer*2 nblock,nblock0
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logical first
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real*8 center_freq,buf8
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common/plrscom/center_freq,msec,fqso,iptr,nblock,userx_no,iusb,buf8(174)
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! 8 4 4 4 2 1 1 1392
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include 'datcom.f90'
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include 'gcom1.f90'
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include 'gcom2.f90'
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equivalence (id,d8)
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data nblock0/0/,first/.true./,kb/1/,ntx/0/,npkt/0/,nw/0/
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data sqave/0.0/,u/0.001/,rxnoise/0.0/
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save
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! Open a socket to receive multicast data from Linrad
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call setup_rsocket
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nreset=-1
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k=0
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nsec0=-999
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10 call recv_pkt(center_freq)
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if(monitoring.eq.1) then
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lost=nblock-nblock0-1
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nblock0=nblock
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if(lost.ne.0 .and. .not.first) then
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! print*,'Lost packets?',nblock,nblock0,lost,rxnoise,mode
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! Fill in zeros for the lost data.
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nlost=nlost + lost
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do i=1,174*lost
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k=k+1
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d8(k)=0
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enddo
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endif
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first=.false.
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nsec=msec/1000
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if(mod(nsec,60).eq.1) nreset=1
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if(mod(nsec,60).eq.0 .and. nreset.eq.1) then
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! This is the start of a new minute, switch buffers
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nreset=0
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kb=3-kb
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k=0
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if(kb.eq.2) k=NSMAX
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nlost=0
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endif
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if(kb.eq.1 .and. (k+174).gt.NSMAX) go to 20
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if(kb.eq.2 .and. (k+174).gt.2*NSMAX) go to 20
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if(transmitting.eq.0) then
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sq=0.
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do i=1,174
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k=k+1
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d8(k)=buf8(i)
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sq=sq + float(id(1,k,1))**2 + float(id(1,k,1))**2 + &
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float(id(1,k,1))**2 + float(id(1,k,1))**2
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enddo
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sqave=sqave + u*(sq-sqave)
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rxnoise=10.0*log10(sqave) - 48.0
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if(mode.eq.'Measur') then
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npkt=npkt+1
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if(npkt.ge.551) then
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npkt=0
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nw=nw+1
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write(11,1000) nw,rxnoise
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1000 format(i6,f8.2)
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call flushqqq(11)
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ndecdone=1
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write(24,1000) nw,rxnoise
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endif
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else
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nw=0
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endif
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else
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! We're transmitting, zero out this packet.
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do i=1,174
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k=k+1
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d8(k)=0.d0
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enddo
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endif
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if(k.lt.1 .or. k.gt.NSZ) then
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print*,'Error in recvpkt: ',k,NSZ,NSMAX
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stop
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endif
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20 if(nsec.ne.nsec0) then
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mutch=nsec/3600
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mutcm=mod(nsec/60,60)
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mutc=100*mutch + mutcm
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ns=mod(nsec,60)
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! write(*,1010) mutc,ns,0.001*msec,k,rxnoise
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!1010 format('UTC:',i5.4,' ns:',i3,' t:',f10.3,' k:',i8)
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nsec0=nsec
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ntx=ntx+transmitting
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if(mod(nsec,60).eq.52) then
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kbuf=kb
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nutc=mutc
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klost=nlost
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if(ntx.lt.20) ndecoding=1
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ntx=0
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endif
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endif
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endif
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go to 10
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end subroutine recvpkt
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