Hi, On Sun, Aug 3, 2014 at 4:27 PM, Clément Bœsch <u...@pkh.me> wrote:
> This removes the avcodec dependency and make the code almost twice as > fast. More to come. > > The DCT factorization is based on "Fast and numerically stable > algorithms for discrete cosine transforms" from Gerlind Plonkaa & > Manfred Tasche (DOI: 10.1016/j.laa.2004.07.015). I have no comments on the patch itself, but can you explain why we're re-implementing a custom f/idct rather than using the one provided in lavcodec? It seems to me that going from fixedpoint/simd'ed to float/c would be slower, not faster, so there must be more to this patch than what I'm getting from it... Ronald _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
