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PostPosted: Wed Feb 14, 2007 6:11 pm 
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Joined: Wed Sep 13, 2006 12:45 pm
Posts: 55
I'd like to add PC-FX MJPEG decoding to Mednafen, the emulator, but I can't figure out what the values of the internal Huffman tables are(they are static, in the chip). There is one piece of software, mixplay, at http://home.highway.ne.jp/soltin/mixplay.html that has the Huffman tables in it, but I can't figure out how to convert them to the format I need to use(16 lengths + code table)... The Magic Engine-FX author reverse-engineered mixplay, but it was too overwhelming when I tried to debug it myself(darn x86 assembly!).

Does anyone know how to construct a JPEG bytestream that, when decoded by a JPEG decoder, will reveal bits of the Huffman tables used to decode, in the decoded graphics?


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