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demux: strictly enforce the animation flag

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if the flag is incorrectly set in a VP8L or VP8/ALPH single image file
the demux will now fail.

Change-Id: Id4d5f2d3f6922a29b442c5d3d0acbe3d679e468a
This commit is contained in:
James Zern 2013-11-14 23:56:59 +00:00
parent c4f39f4a31
commit e18e66779b
1 changed files with 2 additions and 1 deletions
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3
src/demux/demux.c
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@ -513,8 +513,9 @@ static ParseStatus ParseVP8X(WebPDemuxer* const dmux) {
case MKFOURCC('A', 'L', 'P', 'H'):
case MKFOURCC('V', 'P', '8', ' '):
case MKFOURCC('V', 'P', '8', 'L'): {
const int has_frames = !!(dmux->feature_flags_ & ANIMATION_FLAG);
// check that this isn't an animation (all frames should be in an ANMF).
if (anim_chunks > 0) return PARSE_ERROR;
if (anim_chunks > 0 || has_frames) return PARSE_ERROR;
Rewind(mem, CHUNK_HEADER_SIZE);
status = ParseSingleImage(dmux);