diff options
| author | ramiro <ramiro@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2009-12-07 03:52:55 +0000 |
|---|---|---|
| committer | ramiro <ramiro@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2009-12-07 03:52:55 +0000 |
| commit | b5b701c544338af167932a0cd803e3a11d1ab0d7 (patch) | |
| tree | 740d76d9b744c48171b8cd3df3fe7f71ba814dd9 | |
| parent | 71f9e96fc7470f5ca692698067898c8ce3d6cfec (diff) | |
| download | mpv-b5b701c544338af167932a0cd803e3a11d1ab0d7.tar.bz2 mpv-b5b701c544338af167932a0cd803e3a11d1ab0d7.tar.xz | |
Document the differences between the two asm fragments in initMMX2HScaler().
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@29978 b3059339-0415-0410-9bf9-f77b7e298cf2
| -rw-r--r-- | libswscale/swscale.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libswscale/swscale.c b/libswscale/swscale.c index 222c0c0136..079ed31cd1 100644 --- a/libswscale/swscale.c +++ b/libswscale/swscale.c @@ -1697,6 +1697,12 @@ static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *fil int xpos, i; // create an optimized horizontal scaling routine + /* This scaler is made of runtime-generated MMX2 code using specially + * tuned pshufw instructions. For every four output pixels, if four + * input pixels are enough for the fast bilinear scaling, then a chunk + * of fragmentB is used. If five input pixels are needed, then a chunk + * of fragmentA is used. + */ //code fragment |