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| author | Pascal Massimino <pascal.massimino@gmail.com> | 2014-09-16 17:01:07 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-09-19 16:33:05 +0200 |
| commit | 4fd21d58a72c38ab63c3a4483b420db260fa7b8d (patch) | |
| tree | d1ccabe211e3a960fd1288c33081e0cbb448dc46 | |
| parent | 59af5383c18c8cf3fe2a4b5cc1ebf2f3300bdfe5 (diff) | |
| download | ffmpeg-4fd21d58a72c38ab63c3a4483b420db260fa7b8d.tar.gz | |
libavcodec/webp: treat out-of-bound palette index as translucent black
See https://code.google.com/p/webp/issues/detail?id=206
for a description of the problem/fix.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This patch makes the decoder follow the recommendation of the spec.
There is some disagreement (see "[FFmpeg-devel] [PATCH]: libavcodec/webp")
about what would be best to be written in the spec, so in case the spec
is changed again, this potentially would need to be amended or reverted
| -rw-r--r-- | libavcodec/webp.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/libavcodec/webp.c b/libavcodec/webp.c index c737f5492d..66c2d57c84 100644 --- a/libavcodec/webp.c +++ b/libavcodec/webp.c @@ -1028,7 +1028,7 @@ static int apply_color_indexing_transform(WebPContext *s) ImageContext *img; ImageContext *pal; int i, x, y; - uint8_t *p, *pi; + uint8_t *p; img = &s->image[IMAGE_ROLE_ARGB]; pal = &s->image[IMAGE_ROLE_COLOR_INDEXING]; @@ -1066,11 +1066,11 @@ static int apply_color_indexing_transform(WebPContext *s) p = GET_PIXEL(img->frame, x, y); i = p[2]; if (i >= pal->frame->width) { - av_log(s->avctx, AV_LOG_ERROR, "invalid palette index %d\n", i); - return AVERROR_INVALIDDATA; + AV_WB32(p, 0xFF000000); + } else { + const uint8_t *pi = GET_PIXEL(pal->frame, i, 0); + AV_COPY32(p, pi); } - pi = GET_PIXEL(pal->frame, i, 0); - AV_COPY32(p, pi); } } |