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| author | Michael Niedermayer <michaelni@gmx.at> | 2007-09-12 22:26:26 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2007-09-12 22:26:26 +0000 |
| commit | c3922c65b596b1f55ff3c2778843590b5974ea4d (patch) | |
| tree | cdc2c953cd1e3385c331bdabb1e388310049e932 /doc/snow.txt | |
| parent | aaac6c29d215dc4f36d7bec8e88466f83a234b5e (diff) | |
| download | ffmpeg-c3922c65b596b1f55ff3c2778843590b5974ea4d.tar.gz | |
make intra dc prediction less contradictory
Originally committed as revision 10482 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'doc/snow.txt')
| -rw-r--r-- | doc/snow.txt | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/doc/snow.txt b/doc/snow.txt index a734776e25..ccea56e618 100644 --- a/doc/snow.txt +++ b/doc/snow.txt @@ -96,9 +96,9 @@ prediction: block(0) block(level): + mvx_diff=mvy_diff=y_diff=cb_diff=cr_diff=0 if(keyframe){ intra=1 - y_diff=cb_diff=cr_diff=0 }else{ if(level!=max_block_depth){ s_context= 2*left->level + 2*top->level + topleft->level + topright->level @@ -333,9 +333,9 @@ the luma and chroma values of the left block are used as predictors the used luma and chroma is the sum of the predictor and y_diff, cb_diff, cr_diff to reverse this in the decoder apply the following: -block[y][x].dc[0] += block[y][x-1].dc[0]; -block[y][x].dc[1] += block[y][x-1].dc[1]; -block[y][x].dc[2] += block[y][x-1].dc[2]; +block[y][x].dc[0] = block[y][x-1].dc[0] + y_diff; +block[y][x].dc[1] = block[y][x-1].dc[1] + cb_diff; +block[y][x].dc[2] = block[y][x-1].dc[2] + cr_diff; block[*][-1].dc[*]= 128; |