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Mux: support parsing unknown chunks within a frame/fragment.

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Change-Id: I9b4dc36c5ccc4b46f60cd64c1ee21008e20c8b95
This commit is contained in:
Urvang Joshi
2013-07-22 16:40:24 -07:00
parent 8ba1bf61a0
commit 52508a1fe4
4 changed files with 36 additions and 22 deletions
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7
src/mux/muxi.h
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@ -48,6 +48,7 @@ struct WebPMuxImage {
WebPChunk* header_; // Corresponds to WEBP_CHUNK_ANMF/WEBP_CHUNK_FRGM.
WebPChunk* alpha_; // Corresponds to WEBP_CHUNK_ALPHA.
WebPChunk* img_; // Corresponds to WEBP_CHUNK_IMAGE.
WebPChunk* unknown_; // Corresponds to WEBP_CHUNK_UNKNOWN.
int width_;
int height_;
int has_alpha_; // Through ALPH chunk or as part of VP8L.
@ -136,6 +137,9 @@ WebPChunk* ChunkRelease(WebPChunk* const chunk);
// Deletes given chunk & returns chunk->next_.
WebPChunk* ChunkDelete(WebPChunk* const chunk);
// Deletes all chunks in the given chunk list.
void ChunkListDelete(WebPChunk** const chunk_list);
// Returns size of the chunk including chunk header and padding byte (if any).
static WEBP_INLINE size_t SizeWithPadding(size_t chunk_size) {
return CHUNK_HEADER_SIZE + ((chunk_size + 1) & ~1U);
@ -148,6 +152,9 @@ static WEBP_INLINE size_t ChunkDiskSize(const WebPChunk* chunk) {
return SizeWithPadding(data_size);
}
// Total size of a list of chunks.
size_t ChunkListDiskSize(const WebPChunk* chunk_list);
// Write out the given list of chunks into 'dst'.
uint8_t* ChunkListEmit(const WebPChunk* chunk_list, uint8_t* dst);