WSJT-X/lib/ft8_decode.f90
Joe Taylor ab3832fa82 In ft8_downsample, compute long FFT only when data have changed.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7780 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2017-07-03 19:52:36 +00:00

77 lines
2.3 KiB
Fortran

module ft8_decode
type :: ft8_decoder
procedure(ft8_decode_callback), pointer :: callback
contains
procedure :: decode
end type ft8_decoder
abstract interface
subroutine ft8_decode_callback (this,sync,snr,dt,freq,nbadcrc,decoded)
import ft8_decoder
implicit none
class(ft8_decoder), intent(inout) :: this
real, intent(in) :: sync
integer, intent(in) :: snr
real, intent(in) :: dt
real, intent(in) :: freq
integer, intent(in) :: nbadcrc
character(len=22), intent(in) :: decoded
end subroutine ft8_decode_callback
end interface
contains
subroutine decode(this,callback,iwave,nfqso,newdat,nutc,nfa, &
nfb,nagain,ndepth,nsubmode)
use timer_module, only: timer
include 'fsk4hf/ft8_params.f90'
class(ft8_decoder), intent(inout) :: this
procedure(ft8_decode_callback) :: callback
real s(NH1,NHSYM)
real candidate(3,100)
real dd(15*12000)
logical, intent(in) :: newdat, nagain
integer*2 iwave(15*12000)
character datetime*13,message*22
save s,dd
this%callback => callback
write(datetime,1001) nutc !### TEMPORARY ###
1001 format("000000_",i6.6)
call timer('sync8 ',0)
call sync8(iwave,nfa,nfb,nfqso,s,candidate,ncand)
call timer('sync8 ',1)
dd=iwave
syncmin=2.0
! rewind 51
do icand=1,ncand
sync=candidate(3,icand)
if(sync.lt.syncmin) cycle
f1=candidate(1,icand)
xdt=candidate(2,icand)
nsnr=min(99,nint(10.0*log10(sync) - 25.5)) !### empirical ###
call timer('ft8b ',0)
call ft8b(dd,newdat,nfqso,f1,xdt,nharderrors,dmin,nbadcrc,message,xsnr)
nsnr=xsnr
xdt=xdt-0.6
call timer('ft8b ',1)
if (associated(this%callback)) call this%callback(sync,nsnr,xdt, &
f1,nbadcrc,message)
! write(*,'(f7.2,i5,f7.2,f9.1,i5,f7.2,2x,a22)') sync,nsnr,xdt,f1,nharderrors,dmin,message
! write(13,1110) datetime,0,nsnr,xdt,f1,nharderrors,dmin,message
1110 format(a13,2i4,f6.2,f7.1,i4,' ~ ',f6.2,2x,a22,' FT8')
! write(51,3051) xdt,f1,sync,dmin,nsnr,nharderrors,nbadcrc,message
!3051 format(4f9.1,3i5,2x,a22)
! flush(51)
enddo
return
end subroutine decode
end module ft8_decode