WSJT-X/lib/decode65b.f90

37 lines
961 B
Fortran
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subroutine decode65b(s2,nflip,mode65,nbmkv,nhist,decoded)
real s2(66,126)
real s3(64,63)
logical first,ltext
character decoded*22
common/prcom/pr(126),mdat(126),mref(126,2),mdat2(126),mref2(126,2)
data first/.true./
save
if(first) call setup65
first=.false.
do j=1,63
k=mdat(j) !Points to data symbol
if(nflip.lt.0) k=mdat2(j)
do i=1,64
s3(i,j)=s2(i+2,k)
enddo
k=mdat2(j) !Points to data symbol
if(nflip.lt.0) k=mdat(j)
enddo
nadd=mode65
call extract(s3,nadd,ncount,nhist,decoded,ltext,nbmkv) !Extract the message
! Suppress "birdie messages" and other garbage decodes:
if(decoded(1:7).eq.'000AAA ') ncount=-1
if(decoded(1:7).eq.'0L6MWK ') ncount=-1
if(nflip.lt.0 .and. ltext) ncount=-1
if(ncount.lt.0) then
nbmkv=0
decoded=' '
endif
return
end subroutine decode65b