starred/ffmpeg-rockchip
1
0
Fork 0
mirror of https://github.com/nyanmisaka/ffmpeg-rockchip.git synced 2026-01-24 07:31:22 +01:00
Code Issues 5 Projects Packages Wiki Activity Actions

optimization tips for the wavelet

Browse source 
Originally committed as revision 10178 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-08-21 20:15:52 +00:00
parent 2cc454705b
commit a282102d3f
1 changed files with 4 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

4
doc/snow.txt
View file

@ -323,6 +323,10 @@ snows 9/7 Integer filter:
/ | \|/ | \|/ | \|/ | \|/
| + | + | + | + +3/2
optimization tips:
following are exactly identical
(3a)>>1 == a + (a>>1)
(a + 4b + 8)>>4 == ((a>>2) + b + 2)>>2
TODO:
=====