[Ffmpeg-devel] [PATCH] ac3 decoder
Thu Sep 28 23:28:53 CEST 2006
Fabrice Bellard wrote:
> Benjamin Larsson wrote:
>>Here is the patch with the ac3 decoder from SoC. Included is the patch
>>to enable the sse imdct from Loren Merrit.
> IMHO, the AC3 decoder bit allocation should be factorized with the
> encoder one (it should be by construction exactly the same function !).
The decoder & encoder bit allocation functions definitely have identical
results, but they are implemented slightly differently. Unless someone
else does it first, I'll make an attempt at a common version this
weekend. Also, there is some opportunity for optimization in both the
encoder and decoder implementations. For example, when exponents & bit
allocation parameters are reused from the previous block, most of the
bit allocation routine can be skipped.
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