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62 lines
1.4 KiB
Fortran
62 lines
1.4 KiB
Fortran
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subroutine extract4(sym,nadd,ncount,decoded)
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real sym(207)
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character decoded*22, submode*1
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character*72 c72
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integer*1 symbol(207)
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integer*1 data1(13) !Decoded data (8-bit bytes)
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integer data4a(9) !Decoded data (8-bit bytes)
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integer data4(12) !Decoded data (6-bit bytes)
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integer mettab(0:255,0:1) !Metric table
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logical first
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data first/.true./
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save first,mettab
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if(first) then
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call getmet24(mode,mettab)
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first=.false.
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endif
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do j=1,207
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r=sym(j) + 128.
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if(r.gt.255.0) r=255.0
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if(r.lt.0.0) r=0.0
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i4=nint(r)
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if(i4.gt.127) i4=i4-256
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symbol(j)=i4
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enddo
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nbits=72+31
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ndelta=50
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limit=100000
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ncycles=0
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ncount=-1
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decoded=' '
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submode=' '
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call interleave24(symbol(2),-1) !Remove the interleaving
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call fano232(symbol(2),nbits,mettab,ndelta,limit,data1,ncycles,metric,ncount)
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nlim=ncycles/nbits
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if(ncount.ge.0) then
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do i=1,9
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i4=data1(i)
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if(i4.lt.0) i4=i4+256
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data4a(i)=i4
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enddo
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write(c72,1100) (data4a(i),i=1,9)
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1100 format(9b8.8)
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read(c72,1102) data4
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1102 format(12b6)
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call unpackmsg(data4,decoded)
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submode=char(ichar('A')+ich-1)
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if(decoded(1:6).eq.'000AAA') then
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decoded='***WRONG MODE?***'
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ncount=-1
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endif
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endif
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return
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end subroutine extract4
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