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| author | Michael Niedermayer <michaelni@gmx.at> | 2014-07-04 01:08:35 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-07-04 01:08:57 +0200 |
| commit | cf8c44fc47330833fadc505dfef2c2c1ae03a561 (patch) | |
| tree | a0bdeb3e3eaafae22424ac538437cf801a39e562 | |
| parent | b28fcbba0c278f9db5d29c9629aa3f70a4b48cd7 (diff) | |
| parent | c6698dfe7cdbc7634f33245875488ed3fa4a8ced (diff) | |
| download | ffmpeg-cf8c44fc47330833fadc505dfef2c2c1ae03a561.tar.gz | |
Merge commit 'c6698dfe7cdbc7634f33245875488ed3fa4a8ced'
* commit 'c6698dfe7cdbc7634f33245875488ed3fa4a8ced':
webpdec: Fix decoding of the huffman group indices.
Merged-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavcodec/webp.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/libavcodec/webp.c b/libavcodec/webp.c index 19cb1fc223..c737f5492d 100644 --- a/libavcodec/webp.c +++ b/libavcodec/webp.c @@ -482,7 +482,9 @@ static int decode_entropy_image(WebPContext *s) max = 0; for (y = 0; y < img->frame->height; y++) { for (x = 0; x < img->frame->width; x++) { - int p = GET_PIXEL_COMP(img->frame, x, y, 2); + int p0 = GET_PIXEL_COMP(img->frame, x, y, 1); + int p1 = GET_PIXEL_COMP(img->frame, x, y, 2); + int p = p0 << 8 | p1; max = FFMAX(max, p); } } @@ -567,7 +569,9 @@ static HuffReader *get_huffman_group(WebPContext *s, ImageContext *img, if (gimg->size_reduction > 0) { int group_x = x >> gimg->size_reduction; int group_y = y >> gimg->size_reduction; - group = GET_PIXEL_COMP(gimg->frame, group_x, group_y, 2); + int g0 = GET_PIXEL_COMP(gimg->frame, group_x, group_y, 1); + int g1 = GET_PIXEL_COMP(gimg->frame, group_x, group_y, 2); + group = g0 << 8 | g1; } return &img->huffman_groups[group * HUFFMAN_CODES_PER_META_CODE]; |