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| author | Michael Niedermayer <michaelni@gmx.at> | 2007-08-21 20:15:52 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2007-08-21 20:15:52 +0000 |
| commit | a282102d3fe2aea2302096e8a75320a2b8ef1cc7 (patch) | |
| tree | 47ff453ea370291a47203a9d31179f126833069c /doc/snow.txt | |
| parent | 2cc454705b695aa1e39abf850929387baa958629 (diff) | |
| download | ffmpeg-a282102d3fe2aea2302096e8a75320a2b8ef1cc7.tar.gz | |
optimization tips for the wavelet
Originally committed as revision 10178 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'doc/snow.txt')
| -rw-r--r-- | doc/snow.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/snow.txt b/doc/snow.txt index c3e16ebc1c..12377e6db9 100644 --- a/doc/snow.txt +++ b/doc/snow.txt @@ -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: ===== |