dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-13 14:34:33 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

Create WebPMuxFrameInfo struct for Mux APIs

Browse Source 
Change-Id: I1f3b15d679280b5347124e1d59865a3df089043b
This commit is contained in:
Urvang Joshi
2012-08-23 15:18:51 +05:30
parent e3990fd8e4
commit ab3234ae6b
4 changed files with 102 additions and 119 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
src/mux/muxedit.c
View File

@ -317,8 +317,10 @@ WebPMuxError WebPMuxSetLoopCount(WebPMux* mux, int loop_count) {
}
static WebPMuxError MuxPushFrameTileInternal(
WebPMux* const mux, const WebPData* const bitstream, int x_offset,
int y_offset, int duration, int copy_data, uint32_t tag) {
WebPMux* const mux, const WebPMuxFrameInfo* const frame_tile_info,
int copy_data, uint32_t tag) {
const WebPData* bitstream;
int x_offset, y_offset, duration;
WebPChunk chunk;
WebPData image;
WebPData alpha;
@ -330,13 +332,21 @@ static WebPMuxError MuxPushFrameTileInternal(
int image_tag;
// Sanity checks.
if (mux == NULL || bitstream == NULL || bitstream->bytes_ == NULL ||
bitstream->size_ > MAX_CHUNK_PAYLOAD) {
if (mux == NULL || frame_tile_info == NULL) {
return WEBP_MUX_INVALID_ARGUMENT;
}
bitstream = &frame_tile_info->bitstream_;
x_offset = frame_tile_info->x_offset_;
y_offset = frame_tile_info->y_offset_;
duration = is_frame ? frame_tile_info->duration_ : 1 /* unused */;
if (bitstream->bytes_ == NULL || bitstream->size_ > MAX_CHUNK_PAYLOAD) {
return WEBP_MUX_INVALID_ARGUMENT;
}
if (x_offset < 0 || x_offset >= MAX_POSITION_OFFSET ||
y_offset < 0 || y_offset >= MAX_POSITION_OFFSET ||
duration <= 0 || duration > MAX_DURATION) {
(is_frame && (duration <= 0 || duration > MAX_DURATION))) {
return WEBP_MUX_INVALID_ARGUMENT;
}
@ -397,18 +407,17 @@ static WebPMuxError MuxPushFrameTileInternal(
return err;
}
WebPMuxError WebPMuxPushFrame(WebPMux* mux, const WebPData* bitstream,
int x_offset, int y_offset,
int duration, int copy_data) {
return MuxPushFrameTileInternal(mux, bitstream, x_offset, y_offset,
duration, copy_data, kChunks[IDX_FRAME].tag);
WebPMuxError WebPMuxPushFrame(WebPMux* mux,
const WebPMuxFrameInfo* frame,
int copy_data) {
return MuxPushFrameTileInternal(mux, frame, copy_data,
kChunks[IDX_FRAME].tag);
}
WebPMuxError WebPMuxPushTile(WebPMux* mux, const WebPData* bitstream,
int x_offset, int y_offset,
WebPMuxError WebPMuxPushTile(WebPMux* mux,
const WebPMuxFrameInfo* tile,
int copy_data) {
return MuxPushFrameTileInternal(mux, bitstream, x_offset, y_offset,
1 /* unused duration */, copy_data,
return MuxPushFrameTileInternal(mux, tile /*unused duration*/, copy_data,
kChunks[IDX_TILE].tag);
}

30
src/mux/muxread.c
View File

@ -315,9 +315,8 @@ WebPMuxError WebPMuxGetLoopCount(const WebPMux* mux, int* loop_count) {
}
static WebPMuxError MuxGetFrameTileInternal(
const WebPMux* const mux, uint32_t nth, WebPData* const bitstream,
int* const x_offset, int* const y_offset, int* const duration,
uint32_t tag) {
const WebPMux* const mux, uint32_t nth,
WebPMuxFrameInfo* const frame_tile_info, uint32_t tag) {
const WebPData* frame_tile_data;
WebPMuxError err;
WebPMuxImage* wpi;
@ -326,8 +325,7 @@ static WebPMuxError MuxGetFrameTileInternal(
const CHUNK_INDEX idx = is_frame ? IDX_FRAME : IDX_TILE;
const WebPChunkId id = kChunks[idx].id;
if (mux == NULL || bitstream == NULL ||
x_offset == NULL || y_offset == NULL || (is_frame && duration == NULL)) {
if (mux == NULL || frame_tile_info == NULL) {
return WEBP_MUX_INVALID_ARGUMENT;
}
@ -340,25 +338,23 @@ static WebPMuxError MuxGetFrameTileInternal(
frame_tile_data = &wpi->header_->data_;
if (frame_tile_data->size_ < kChunks[idx].size) return WEBP_MUX_BAD_DATA;
*x_offset = 2 * GetLE24(frame_tile_data->bytes_ + 0);
*y_offset = 2 * GetLE24(frame_tile_data->bytes_ + 3);
if (is_frame) *duration = 1 + GetLE24(frame_tile_data->bytes_ + 12);
frame_tile_info->x_offset_ = 2 * GetLE24(frame_tile_data->bytes_ + 0);
frame_tile_info->y_offset_ = 2 * GetLE24(frame_tile_data->bytes_ + 3);
if (is_frame) {
frame_tile_info->duration_ = 1 + GetLE24(frame_tile_data->bytes_ + 12);
}
return SynthesizeBitstream(wpi, bitstream);
return SynthesizeBitstream(wpi, &frame_tile_info->bitstream_);
}
WebPMuxError WebPMuxGetFrame(const WebPMux* mux, uint32_t nth,
WebPData* bitstream,
int* x_offset, int* y_offset, int* duration) {
return MuxGetFrameTileInternal(mux, nth, bitstream, x_offset, y_offset,
duration, kChunks[IDX_FRAME].tag);
WebPMuxFrameInfo* frame) {
return MuxGetFrameTileInternal(mux, nth, frame, kChunks[IDX_FRAME].tag);
}
WebPMuxError WebPMuxGetTile(const WebPMux* mux, uint32_t nth,
WebPData* bitstream,
int* x_offset, int* y_offset) {
return MuxGetFrameTileInternal(mux, nth, bitstream, x_offset, y_offset, NULL,
kChunks[IDX_TILE].tag);
WebPMuxFrameInfo* tile) {
return MuxGetFrameTileInternal(mux, nth, tile, kChunks[IDX_TILE].tag);
}
// Get chunk index from chunk id. Returns IDX_NIL if not found.