WSJT-X/libm65/decode65b.f

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subroutine decode65b(s2,flip,mycall,hiscall,hisgrid,mode65,
+ neme,ndepth,nqd,nkv,nhist,qual,decoded,s3,sy)
real s2(66,126)
real s3(64,63),sy(63)
logical first,ltext
character decoded*22,deepmsg*22
character mycall*12,hiscall*12,hisgrid*6
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(flip.lt.0.0) k=mdat2(j)
do i=1,64
s3(i,j)=s2(i+2,k)
enddo
k=mdat2(j) !Points to data symbol
if(flip.lt.0.0) k=mdat(j)
sy(j)=s2(1,k)
enddo
nadd=mode65
call extract(s3,nadd,ncount,nhist,decoded,ltext) !Extract the message
C Suppress "birdie messages" and other garbage decodes:
if(decoded(1:7).eq.'000AAA ') ncount=-1
if(decoded(1:7).eq.'0L6MWK ') ncount=-1
if(flip.lt.0.0 .and. ltext) ncount=-1
nkv=1
if(ncount.lt.0) then
nkv=0
decoded=' '
endif
qual=0.
if(ndepth.ge.1 .and. (nqd.eq.1 .or. flip.eq.1.0)) then
call deep65(s3,mode65,neme,flip,mycall,hiscall,
+ hisgrid,deepmsg,qual)
if(nqd.ne.1 .and. qual.lt.10.0) qual=0.0
if(ndepth.lt.2 .and. qual.lt.6.0) qual=0.0
endif
if(nkv.eq.0 .and. qual.ge.1.0) decoded=deepmsg
return
end