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https://github.com/saitohirga/WSJT-X.git
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80 lines
2.3 KiB
Fortran
80 lines
2.3 KiB
Fortran
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program QRA65code
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! Provides examples of message packing, bit and symbol ordering,
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! Reed Solomon encoding, and other necessary details of the QRA65
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! protocol.
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use packjt
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character*22 msg,msg0,msg1,decoded,cok*3,bad*1,msgtype*10
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integer dgen(12),sent(63),dec(12)
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real s3(0:63,1:63)
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include 'testmsg.f90'
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nargs=iargc()
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if(nargs.ne.1) then
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print*,'Usage: qra65code "message"'
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print*,' qra65code -t'
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go to 999
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endif
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call getarg(1,msg) !Get message from command line
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nmsg=1
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if(msg(1:2).eq."-t") nmsg=NTEST
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write(*,1010)
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1010 format(" Message Decoded Err? Type rc"/77("-"))
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do imsg=1,nmsg
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if(nmsg.gt.1) msg=testmsg(imsg)
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call fmtmsg(msg,iz) !To upper, collapse mult blanks
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msg0=msg !Input message
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call chkmsg(msg,cok,nspecial,flip) !See if it includes "OOO" report
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msg1=msg !Message without "OOO"
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call packmsg(msg1,dgen,itype) !Pack message into 12 six-bit bytes
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msgtype=""
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if(itype.eq.1) msgtype="Std Msg"
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if(itype.eq.2) msgtype="Type 1 pfx"
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if(itype.eq.3) msgtype="Type 1 sfx"
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if(itype.eq.4) msgtype="Type 2 pfx"
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if(itype.eq.5) msgtype="Type 2 sfx"
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if(itype.eq.6) msgtype="Free text"
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call qra65_enc(dgen,sent) !Encode using QRA65
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! Generate a simulated s3() array with moderately high S/N
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s3=1.0
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do j=1,63
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do i=0,63
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s3(i,j)=1.0 + 0.1*gran()
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enddo
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k=sent(j)
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s3(k,j)=s3(k,j) + 1.2
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enddo
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call qra65_dec(s3,dec,irc) !Decode
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decoded=" "
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if(irc.ge.0) then
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call unpackmsg(dec,decoded) !Unpack the user message
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call fmtmsg(decoded,iz)
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endif
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bad=" "
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if(decoded.ne.msg0) bad="*"
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write(*,1020) imsg,msg0,decoded,bad,itype,msgtype,irc
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1020 format(i2,'.',2x,a22,2x,a22,3x,a1,i3,": ",a13,i3)
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enddo
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if(nmsg.eq.1) then
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write(*,1030) dgen
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1030 format(/'Packed message, 6-bit symbols ',12i3) !Display packed symbols
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write(*,1040) sent
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1040 format(/'Information-carrying channel symbols'/(i5,20i3))
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write(*,1050) dec
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1050 format(/'Received message, 6-bit symbols ',12i3) !Display packed symbols
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endif
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999 end program QRA65code
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