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Common APIs for chunks metadata and color profile.

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Change-Id: Ie105ce913c0b56e34cc26fd7ec397103354f268a
This commit is contained in:
Urvang Joshi
2012-08-23 15:28:20 +05:30
committed by Gerrit Code Review
parent 2a3117a1e6
commit 1c04a0d438
7 changed files with 95 additions and 118 deletions
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53
src/mux/muxedit.c
View File

@ -185,8 +185,8 @@ static WebPMuxError DeleteChunks(WebPChunk** chunk_list, uint32_t tag) {
return err;
}
static WebPMuxError MuxDeleteAllNamedData(WebPMux* const mux, CHUNK_INDEX idx) {
const WebPChunkId id = kChunks[idx].id;
static WebPMuxError MuxDeleteAllNamedData(WebPMux* const mux, uint32_t tag) {
const WebPChunkId id = ChunkGetIdFromTag(tag);
WebPChunk** chunk_list;
if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT;
@ -195,11 +195,11 @@ static WebPMuxError MuxDeleteAllNamedData(WebPMux* const mux, CHUNK_INDEX idx) {
chunk_list = MuxGetChunkListFromId(mux, id);
if (chunk_list == NULL) return WEBP_MUX_INVALID_ARGUMENT;
return DeleteChunks(chunk_list, kChunks[idx].tag);
return DeleteChunks(chunk_list, tag);
}
static WebPMuxError DeleteLoopCount(WebPMux* const mux) {
return MuxDeleteAllNamedData(mux, IDX_LOOP);
return MuxDeleteAllNamedData(mux, kChunks[IDX_LOOP].tag);
}
//------------------------------------------------------------------------------
@ -260,39 +260,24 @@ WebPMuxError WebPMuxSetImage(WebPMux* mux,
return err;
}
WebPMuxError WebPMuxSetMetadata(WebPMux* mux, const WebPData* metadata,
int copy_data) {
WebPMuxError WebPMuxSetChunk(WebPMux* mux, const char fourcc[4],
const WebPData* chunk_data, int copy_data) {
const CHUNK_INDEX idx = ChunkGetIndexFromFourCC(fourcc);
const uint32_t tag = ChunkGetTagFromFourCC(fourcc);
WebPMuxError err;
if (mux == NULL || metadata == NULL || metadata->bytes_ == NULL ||
metadata->size_ > MAX_CHUNK_PAYLOAD) {
if (mux == NULL || chunk_data == NULL || chunk_data->bytes_ == NULL ||
chunk_data->size_ > MAX_CHUNK_PAYLOAD) {
return WEBP_MUX_INVALID_ARGUMENT;
}
// Delete the existing metadata chunk(s).
err = WebPMuxDeleteMetadata(mux);
// Delete existing chunk(s) with the same 'fourcc'.
err = MuxDeleteAllNamedData(mux, tag);
if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err;
// Add the given metadata chunk.
return MuxSet(mux, IDX_META, 1, metadata, copy_data);
// Add the given chunk.
return MuxSet(mux, idx, 1, chunk_data, copy_data);
}
WebPMuxError WebPMuxSetColorProfile(WebPMux* mux, const WebPData* color_profile,
int copy_data) {
WebPMuxError err;
if (mux == NULL || color_profile == NULL || color_profile->bytes_ == NULL ||
color_profile->size_ > MAX_CHUNK_PAYLOAD) {
return WEBP_MUX_INVALID_ARGUMENT;
}
// Delete the existing ICCP chunk(s).
err = WebPMuxDeleteColorProfile(mux);
if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err;
// Add the given ICCP chunk.
return MuxSet(mux, IDX_ICCP, 1, color_profile, copy_data);
}
WebPMuxError WebPMuxSetLoopCount(WebPMux* mux, int loop_count) {
WebPMuxError err;
@ -437,12 +422,8 @@ WebPMuxError WebPMuxDeleteImage(WebPMux* mux) {
return WEBP_MUX_OK;
}
WebPMuxError WebPMuxDeleteMetadata(WebPMux* mux) {
return MuxDeleteAllNamedData(mux, IDX_META);
}
WebPMuxError WebPMuxDeleteColorProfile(WebPMux* mux) {
return MuxDeleteAllNamedData(mux, IDX_ICCP);
WebPMuxError WebPMuxDeleteChunk(WebPMux* mux, const char fourcc[4]) {
return MuxDeleteAllNamedData(mux, ChunkGetTagFromFourCC(fourcc));
}
static WebPMuxError DeleteFrameTileInternal(WebPMux* const mux, uint32_t nth,
@ -595,7 +576,7 @@ static WebPMuxError CreateVP8XChunk(WebPMux* const mux) {
// If VP8X chunk(s) is(are) already present, remove them (and later add new
// VP8X chunk with updated flags).
err = MuxDeleteAllNamedData(mux, IDX_VP8X);
err = MuxDeleteAllNamedData(mux, kChunks[IDX_VP8X].tag);
if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err;
// Set flags.

6
src/mux/muxi.h
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@ -140,6 +140,12 @@ CHUNK_INDEX ChunkGetIndexFromTag(uint32_t tag);
// Get chunk id from chunk tag. Returns WEBP_CHUNK_NIL if not found.
WebPChunkId ChunkGetIdFromTag(uint32_t tag);
// Convert a fourcc string to a tag.
uint32_t ChunkGetTagFromFourCC(const char fourcc[4]);
// Get chunk index from fourcc. Returns IDX_UNKNOWN if given fourcc is unknown.
CHUNK_INDEX ChunkGetIndexFromFourCC(const char fourcc[4]);
// Search for nth chunk with given 'tag' in the chunk list.
// nth = 0 means "last of the list".
WebPChunk* ChunkSearchList(WebPChunk* first, uint32_t nth, uint32_t tag);

10
src/mux/muxinternal.c
View File

@ -73,6 +73,16 @@ WebPChunkId ChunkGetIdFromTag(uint32_t tag) {
return WEBP_CHUNK_NIL;
}
uint32_t ChunkGetTagFromFourCC(const char fourcc[4]) {
return MKFOURCC(fourcc[0], fourcc[1], fourcc[2], fourcc[3]);
}
CHUNK_INDEX ChunkGetIndexFromFourCC(const char fourcc[4]) {
const uint32_t tag = ChunkGetTagFromFourCC(fourcc);
const CHUNK_INDEX idx = ChunkGetIndexFromTag(tag);
return (idx == IDX_NIL) ? IDX_UNKNOWN : idx;
}
//------------------------------------------------------------------------------
// Chunk search methods.

24
src/mux/muxread.c
View File

@ -289,15 +289,21 @@ WebPMuxError WebPMuxGetImage(const WebPMux* mux, WebPData* bitstream) {
return SynthesizeBitstream(wpi, bitstream);
}
WebPMuxError WebPMuxGetMetadata(const WebPMux* mux, WebPData* metadata) {
if (mux == NULL || metadata == NULL) return WEBP_MUX_INVALID_ARGUMENT;
return MuxGet(mux, IDX_META, 1, metadata);
}
WebPMuxError WebPMuxGetColorProfile(const WebPMux* mux,
WebPData* color_profile) {
if (mux == NULL || color_profile == NULL) return WEBP_MUX_INVALID_ARGUMENT;
return MuxGet(mux, IDX_ICCP, 1, color_profile);
WebPMuxError WebPMuxGetChunk(const WebPMux* mux, const char fourcc[4],
WebPData* chunk_data) {
const CHUNK_INDEX idx = ChunkGetIndexFromFourCC(fourcc);
if (mux == NULL || chunk_data == NULL || IsWPI(kChunks[idx].id)) {
return WEBP_MUX_INVALID_ARGUMENT;
}
if (idx != IDX_UNKNOWN) { // A known chunk type.
return MuxGet(mux, idx, 1, chunk_data);
} else { // An unknown chunk type.
const WebPChunk* const chunk =
ChunkSearchList(mux->unknown_, 1, ChunkGetTagFromFourCC(fourcc));
if (chunk == NULL) return WEBP_MUX_NOT_FOUND;
*chunk_data = chunk->data_;
return WEBP_MUX_OK;
}
}
WebPMuxError WebPMuxGetLoopCount(const WebPMux* mux, int* loop_count) {