[FFmpeg-cvslog] vp8dsp: Clarify the first dimension of the mc function tables

[Martin Storsjö]

ffmpeg | branch: master | Martin Storsjö <martin at martin.st> | Thu Jun 23 14:31:14 2016 +0300| [dc08bbf63a217c839aa4c143f2a1d0b7e2e6d997] | committer: Martin Storsjö

vp8dsp: Clarify the first dimension of the mc function tables

Index 0 is w=16, 1 is wd=8, 2 is wd=4.

Signed-off-by: Martin Storsjö <martin at martin.st>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=dc08bbf63a217c839aa4c143f2a1d0b7e2e6d997
---

 libavcodec/vp8dsp.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/vp8dsp.h b/libavcodec/vp8dsp.h
index 4864cf7..deb8f27 100644
--- a/libavcodec/vp8dsp.h
+++ b/libavcodec/vp8dsp.h
@@ -70,12 +70,12 @@ typedef struct VP8DSPContext {
     void (*vp8_h_loop_filter_simple)(uint8_t *dst, ptrdiff_t stride, int flim);
 
     /**
-     * first dimension: width>>3, height is assumed equal to width
+     * first dimension: 4-log2(width), height is assumed equal to width
      * second dimension: 0 if no vertical interpolation is needed;
      *                   1 4-tap vertical interpolation filter (my & 1)
      *                   2 6-tap vertical interpolation filter (!(my & 1))
      * third dimension: same as second dimension, for horizontal interpolation
-     * so something like put_vp8_epel_pixels_tab[width>>3][2*!!my-(my&1)][2*!!mx-(mx&1)](..., mx, my)
+     * so something like put_vp8_epel_pixels_tab[4-log2(width)][2*!!my-(my&1)][2*!!mx-(mx&1)](..., mx, my)
      */
     vp8_mc_func put_vp8_epel_pixels_tab[3][3][3];
     vp8_mc_func put_vp8_bilinear_pixels_tab[3][3][3];