2017-07-08 14:06:48 +00:00
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module ft8_decode
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type :: ft8_decoder
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procedure(ft8_decode_callback), pointer :: callback
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contains
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procedure :: decode
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end type ft8_decoder
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abstract interface
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subroutine ft8_decode_callback (this,sync,snr,dt,freq,nbadcrc,decoded)
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import ft8_decoder
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implicit none
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class(ft8_decoder), intent(inout) :: this
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real, intent(in) :: sync
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integer, intent(in) :: snr
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real, intent(in) :: dt
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real, intent(in) :: freq
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integer, intent(in) :: nbadcrc
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character(len=22), intent(in) :: decoded
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end subroutine ft8_decode_callback
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end interface
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contains
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subroutine decode(this,callback,iwave,nfqso,newdat,nutc,nfa, &
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nfb,nagain,ndepth,nsubmode,mycall12,hiscall12,hisgrid6)
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!use wavhdr
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use timer_module, only: timer
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include 'fsk4hf/ft8_params.f90'
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!type(hdr) h
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class(ft8_decoder), intent(inout) :: this
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procedure(ft8_decode_callback) :: callback
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real s(NH1,NHSYM)
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real candidate(3,200)
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real dd(15*12000)
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logical, intent(in) :: newdat, nagain
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character*12 mycall12, hiscall12
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character*6 hisgrid6
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integer*2 iwave(15*12000)
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integer apsym(KK)
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character datetime*13,message*22
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save s,dd
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this%callback => callback
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write(datetime,1001) nutc !### TEMPORARY ###
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1001 format("000000_",i6.6)
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if(index(hisgrid6," ").eq.0) hisgrid6="EN50"
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call ft8apset(mycall12,hiscall12,hisgrid6,apsym)
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dd=iwave
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call timer('sync8 ',0)
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call sync8(dd,nfa,nfb,nfqso,s,candidate,ncand)
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call timer('sync8 ',1)
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syncmin=2.0
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do icand=1,ncand
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sync=candidate(3,icand)
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if(sync.lt.syncmin) cycle
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f1=candidate(1,icand)
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xdt=candidate(2,icand)
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nsnr0=min(99,nint(10.0*log10(sync) - 25.5)) !### empirical ###
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call timer('ft8b ',0)
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call ft8b(dd,newdat,nfqso,ndepth,icand,sync,f1,xdt,apsym,nharderrors, &
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dmin,nbadcrc,message,xsnr)
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nsnr=xsnr
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xdt=xdt-0.6
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call timer('ft8b ',1)
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if (associated(this%callback)) call this%callback(sync,nsnr,xdt, &
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f1,nbadcrc,message)
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! write(*,'(f7.2,i5,f7.2,f9.1,i5,f7.2,2x,a22)') sync,nsnr,xdt,f1,nharderrors,dmin,message
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! write(13,1110) datetime,0,nsnr,xdt,f1,nharderrors,dmin,message
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!1110 format(a13,2i4,f6.2,f7.1,i4,' ~ ',f6.2,2x,a22,' FT8')
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! write(51,3051) xdt,f1,sync,dmin,nsnr,nharderrors,nbadcrc,message
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!3051 format(4f9.1,3i5,2x,a22)
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! flush(51)
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enddo
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!h=default_header(12000,NMAX)
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!open(10,file='subtract.wav',status='unknown',access='stream')
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!iwave=nint(dd)
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!write(10) h,iwave
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!close(10)
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return
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end subroutine decode
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end module ft8_decode
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subroutine ft8apset(mycall12,hiscall12,hisgrid6,apsym)
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parameter(NAPM=4,KK=87)
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character*12 mycall12,hiscall12
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character*22 msg,msgsent
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character*6 mycall,hiscall
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character*6 hisgrid6
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character*4 hisgrid
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integer apsym(KK)
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integer*1 msgbits(KK)
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integer itone(KK)
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mycall=mycall12(1:6)
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hiscall=hiscall12(1:6)
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hisgrid=hisgrid6(1:4)
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msg=mycall//' '//hiscall//' '//hisgrid
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call genft8(msg,msgsent,msgbits,itone)
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apsym=2*msgbits-1
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return
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end subroutine ft8apset
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