[Ffmpeg-devel] MMX/MMX2 and SSE optimizations for H.264 decoding
Thu Sep 22 19:47:51 CEST 2005
On Thu, 22 Sep 2005, Romain Dolbeau wrote:
> Loren Merritt wrote:
>> we have:
>> we do not have equivalents of:
> The additional question is, are we going to be bitten by
> Amdahl's Law ? i.e. are these important enought during
> the decoding process to justify optimizing them ?
idct is not so important (iirc 3% total speedup when I mmxed it).
qpel_4 matters only on videos that use 4x4 motion partitions.
qpel_8 and loop_filter are important.
More information about the ffmpeg-devel