RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

gmc1 

Originally committed as revision 1446 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-01-11 15:38:00 +00:00
parent 3df7be0f72
commit 143cc72527
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
doc/optimization.txt
View File

@ -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