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| author | Christophe Gisquet <christophe.gisquet@gmail.com> | 2012-04-19 22:36:17 +0200 |
|---|---|---|
| committer | Diego Biurrun <diego@biurrun.de> | 2012-05-10 18:42:43 +0200 |
| commit | 110d0cdc9d1ec414a658f841a3fbefbf6f796d61 (patch) | |
| tree | d2f80a035204c7a75a6daa5c71357e61817ffd54 /libavcodec/bitstream.c | |
| parent | 706b998cdcea97c50fad2228f67488de0e06b2a2 (diff) | |
| download | ffmpeg-110d0cdc9d1ec414a658f841a3fbefbf6f796d61.tar.gz | |
rv40dsp x86: MMX/MMX2/3DNow/SSE2/SSSE3 implementations of MC
Code mostly inspired by vp8's MC, however:
- its MMX2 horizontal filter is worse because it can't take advantage of
the coefficient redundancy
- that same coefficient redundancy allows better code for non-SSSE3 versions
Benchmark (rounded to tens of unit):
V8x8 H8x8 2D8x8 V16x16 H16x16 2D16x16
C 445 358 985 1785 1559 3280
MMX* 219 271 478 714 929 1443
SSE2 131 158 294 425 515 892
SSSE3 120 122 248 387 390 763
End result is overall around a 15% speedup for SSSE3 version (on 6 sequences);
all loop filter functions now take around 55% of decoding time, while luma MC
dsp functions are around 6%, chroma ones are 1.3% and biweight around 2.3%.
Signed-off-by: Diego Biurrun <diego@biurrun.de>
Diffstat (limited to 'libavcodec/bitstream.c')
0 files changed, 0 insertions, 0 deletions