70 lines
1.6 KiB
Plaintext
70 lines
1.6 KiB
Plaintext
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subroutine extract4(sym0,ncount,decoded)
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use packjt
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real sym0(207)
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real sym(207)
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character decoded*22
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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(-128:127,0:1) !Metric table
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logical first
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data first/.true./
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save first,mettab,ndelta
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if(first) then
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call getmet4(mettab,ndelta)
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first=.false.
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endif
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!### Optimize these params: ...
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amp=30.0
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limit=10000
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ave0=sum(sym0)/207.0
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sym=sym0-ave0
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sq=dot_product(sym,sym)
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rms0=sqrt(sq/206.0)
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sym=sym/rms0
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do j=1,207
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n=nint(amp*sym(j))
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if(n.lt.-127) n=-127
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if(n.gt.127) n=127
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symbol(j)=n
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enddo
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nbits=72
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ncycles=0
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ncount=-1
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decoded=' '
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call interleave4(symbol(2),-1) !Remove the interleaving
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call fano232(symbol(2),nbits+31,mettab,ndelta,limit,data1, &
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ncycles,metric,ncount)
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nlim=ncycles/(nbits+31)
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!### Make usage here like that in jt9fano...
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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,.false.,' ')
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if(decoded(1:6).eq.'000AAA') then
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! decoded='***WRONG MODE?***'
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decoded=' '
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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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