diff options
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 d2ee33f..8a718e1 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 |