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| author | Michael Niedermayer <michaelni@gmx.at> | 2003-01-11 15:38:00 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2003-01-11 15:38:00 +0000 |
| commit | 143cc725273c130220e42b7281318ae80083cda3 (patch) | |
| tree | 68c39d568677d6d9951cd85d0a925de1130f412c /doc/optimization.txt | |
| parent | 3df7be0f72f39c7c2ed483b54fbc2e9269cf90e9 (diff) | |
gmc1
Originally committed as revision 1446 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'doc/optimization.txt')
| -rw-r--r-- | doc/optimization.txt | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/doc/optimization.txt b/doc/optimization.txt index d2ee33f216..8a718e1413 100644 --- a/doc/optimization.txt +++ b/doc/optimization.txt @@ -68,12 +68,20 @@ get_pixels / diff_pixels clear_blocks easiest, to optimize - + gmc used for mpeg4 gmc optimizing this should have a significant effect on the gmc decoding speed but its very likely impossible to write in SIMD +gmc1 + used for chroma blocks in mpeg4 gmc with 1 warp point + (there are 4 luma & 2 chroma blocks per macrobock, so + only 1/3 of the gmc blocks use this, the other 2/3 + use the normal put_pixel* code, but only if there is + just 1 warp point) + Note: Divx5 gmc always uses just 1 warp point + pix_sum used for encoding |