[Ffmpeg-devel] [Ffmpeg-devel-old] Huffman Limits

[Mike Melanson]

Hi,
	Are there any limits on Huffman tables in FFmpeg? I guess I am asking 
about codeword sizes. There are some tables in AAC where the codewords 
reach up to 19 bits it size. But then, SVQ1 has some 22-bit codewords 
and FFmpeg seems to have no trouble handling those. Are there any 
special concerns with larger codeword sizes?

	Here is the table in question:

http://wiki.multimedia.cx/index.php?title=AAC_Huffman_Tables#AAC_Scalefactor_Huffman_Table

FAAD2 approaches the problem with a 19-level binary Huffman tree. Maybe 
we can do better.

	Thanks...
-- 
	-Mike Melanson


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