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Mux API change:

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Create common APIs for image, frame and tile.

Change-Id: I709ad752133094bd5bc89dd9c832ff79802aac68
This commit is contained in:
Urvang Joshi
2012-08-23 16:28:36 +05:30
parent c6e98658d2
commit d0c79f0552
7 changed files with 286 additions and 443 deletions
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296
src/mux/muxedit.c
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@@ -205,61 +205,6 @@ static WebPMuxError DeleteLoopCount(WebPMux* const mux) {
//------------------------------------------------------------------------------
// Set API(s).
WebPMuxError WebPMuxSetImage(WebPMux* mux,
const WebPData* bitstream, int copy_data) {
WebPMuxError err;
WebPChunk chunk;
WebPMuxImage wpi;
WebPData image;
WebPData alpha;
int is_lossless;
int image_tag;
if (mux == NULL || bitstream == NULL || bitstream->bytes_ == NULL ||
bitstream->size_ > MAX_CHUNK_PAYLOAD) {
return WEBP_MUX_INVALID_ARGUMENT;
}
// If given data is for a whole webp file,
// extract only the VP8/VP8L data from it.
err = GetImageData(bitstream, &image, &alpha, &is_lossless);
if (err != WEBP_MUX_OK) return err;
image_tag = is_lossless ? kChunks[IDX_VP8L].tag : kChunks[IDX_VP8].tag;
// Delete the existing images.
MuxImageDeleteAll(&mux->images_);
MuxImageInit(&wpi);
if (alpha.bytes_ != NULL) { // Add alpha chunk.
ChunkInit(&chunk);
err = ChunkAssignData(&chunk, &alpha, copy_data, kChunks[IDX_ALPHA].tag);
if (err != WEBP_MUX_OK) goto Err;
err = ChunkSetNth(&chunk, &wpi.alpha_, 1);
if (err != WEBP_MUX_OK) goto Err;
}
// Add image chunk.
ChunkInit(&chunk);
err = ChunkAssignData(&chunk, &image, copy_data, image_tag);
if (err != WEBP_MUX_OK) goto Err;
err = ChunkSetNth(&chunk, &wpi.img_, 1);
if (err != WEBP_MUX_OK) goto Err;
// Add this image to mux.
err = MuxImagePush(&wpi, &mux->images_);
if (err != WEBP_MUX_OK) goto Err;
// All OK.
return WEBP_MUX_OK;
Err:
// Something bad happened.
ChunkRelease(&chunk);
MuxImageRelease(&wpi);
return err;
}
WebPMuxError WebPMuxSetChunk(WebPMux* mux, const char fourcc[4],
const WebPData* chunk_data, int copy_data) {
const CHUNK_INDEX idx = ChunkGetIndexFromFourCC(fourcc);
@@ -278,105 +223,60 @@ WebPMuxError WebPMuxSetChunk(WebPMux* mux, const char fourcc[4],
return MuxSet(mux, idx, 1, chunk_data, copy_data);
}
WebPMuxError WebPMuxSetLoopCount(WebPMux* mux, int loop_count) {
// Creates a chunk from given 'data' and sets it as 1st chunk in 'chunk_list'.
static WebPMuxError AddDataToChunkList(
const WebPData* const data, int copy_data, uint32_t tag,
WebPChunk** chunk_list) {
WebPChunk chunk;
WebPMuxError err;
uint8_t* data = NULL;
if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT;
if (loop_count >= MAX_LOOP_COUNT) return WEBP_MUX_INVALID_ARGUMENT;
// Delete the existing LOOP chunk(s).
err = DeleteLoopCount(mux);
if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err;
// Add the given loop count.
data = (uint8_t*)malloc(kChunks[IDX_LOOP].size);
if (data == NULL) return WEBP_MUX_MEMORY_ERROR;
PutLE16(data, loop_count);
err = MuxAddChunk(mux, 1, kChunks[IDX_LOOP].tag, data,
kChunks[IDX_LOOP].size, 1);
free(data);
ChunkInit(&chunk);
err = ChunkAssignData(&chunk, data, copy_data, tag);
if (err != WEBP_MUX_OK) goto Err;
err = ChunkSetNth(&chunk, chunk_list, 1);
if (err != WEBP_MUX_OK) goto Err;
return WEBP_MUX_OK;
Err:
ChunkRelease(&chunk);
return err;
}
static WebPMuxError MuxPushFrameTileInternal(
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;
// Extracts image & alpha data from the given bitstream and then sets wpi.alpha_
// and wpi.img_ appropriately.
static WebPMuxError SetAlphaAndImageChunks(
const WebPData* const bitstream, int copy_data, WebPMuxImage* const wpi) {
int is_lossless = 0;
WebPData image, alpha;
WebPMuxError err = GetImageData(bitstream, &image, &alpha, &is_lossless);
const int image_tag =
is_lossless ? kChunks[IDX_VP8L].tag : kChunks[IDX_VP8].tag;
if (err != WEBP_MUX_OK) return err;
if (alpha.bytes_ != NULL) {
err = AddDataToChunkList(&alpha, copy_data, kChunks[IDX_ALPHA].tag,
&wpi->alpha_);
if (err != WEBP_MUX_OK) return err;
}
return AddDataToChunkList(&image, copy_data, image_tag, &wpi->img_);
}
WebPMuxError WebPMuxSetImage(WebPMux* mux, const WebPData* bitstream,
int copy_data) {
WebPMuxImage wpi;
WebPMuxError err;
WebPData frame_tile;
const int is_frame = (tag == kChunks[IDX_FRAME].tag) ? 1 : 0;
int is_lossless;
int image_tag;
// Sanity checks.
if (mux == NULL || frame_tile_info == NULL) {
if (mux == NULL || bitstream == NULL || bitstream->bytes_ == NULL ||
bitstream->size_ > MAX_CHUNK_PAYLOAD) {
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 ||
(is_frame && (duration <= 0 || duration > MAX_DURATION))) {
return WEBP_MUX_INVALID_ARGUMENT;
if (mux->images_ != NULL) {
// Only one 'simple image' can be added in mux. So, remove present images.
MuxImageDeleteAll(&mux->images_);
}
// Snap offsets to even positions.
x_offset &= ~1;
y_offset &= ~1;
// If given data is for a whole webp file,
// extract only the VP8/VP8L data from it.
err = GetImageData(bitstream, &image, &alpha, &is_lossless);
if (err != WEBP_MUX_OK) return err;
image_tag = is_lossless ? kChunks[IDX_VP8L].tag : kChunks[IDX_VP8].tag;
WebPDataInit(&frame_tile);
ChunkInit(&chunk);
MuxImageInit(&wpi);
if (alpha.bytes_ != NULL) {
// Add alpha chunk.
err = ChunkAssignData(&chunk, &alpha, copy_data, kChunks[IDX_ALPHA].tag);
if (err != WEBP_MUX_OK) goto Err;
err = ChunkSetNth(&chunk, &wpi.alpha_, 1);
if (err != WEBP_MUX_OK) goto Err;
ChunkInit(&chunk); // chunk owned by wpi.alpha_ now.
}
// Add image chunk.
err = ChunkAssignData(&chunk, &image, copy_data, image_tag);
err = SetAlphaAndImageChunks(bitstream, copy_data, &wpi);
if (err != WEBP_MUX_OK) goto Err;
err = ChunkSetNth(&chunk, &wpi.img_, 1);
if (err != WEBP_MUX_OK) goto Err;
ChunkInit(&chunk); // chunk owned by wpi.img_ now.
// Create frame/tile data.
err = CreateFrameTileData(&image, x_offset, y_offset, duration, is_lossless,
is_frame, &frame_tile);
if (err != WEBP_MUX_OK) goto Err;
// Add frame/tile chunk (with copy_data = 1).
err = ChunkAssignData(&chunk, &frame_tile, 1, tag);
if (err != WEBP_MUX_OK) goto Err;
WebPDataClear(&frame_tile);
err = ChunkSetNth(&chunk, &wpi.header_, 1);
if (err != WEBP_MUX_OK) goto Err;
ChunkInit(&chunk); // chunk owned by wpi.header_ now.
// Add this WebPMuxImage to mux.
err = MuxImagePush(&wpi, &mux->images_);
@@ -386,61 +286,103 @@ static WebPMuxError MuxPushFrameTileInternal(
return WEBP_MUX_OK;
Err: // Something bad happened.
WebPDataClear(&frame_tile);
ChunkRelease(&chunk);
MuxImageRelease(&wpi);
return err;
}
WebPMuxError WebPMuxPushFrame(WebPMux* mux,
const WebPMuxFrameInfo* frame,
WebPMuxError WebPMuxPushFrame(WebPMux* mux, const WebPMuxFrameInfo* frame,
int copy_data) {
return MuxPushFrameTileInternal(mux, frame, copy_data,
kChunks[IDX_FRAME].tag);
WebPMuxImage wpi;
WebPMuxError err;
int is_frame;
const WebPData* const bitstream = &frame->bitstream_;
// Sanity checks.
if (mux == NULL || frame == NULL) return WEBP_MUX_INVALID_ARGUMENT;
is_frame = (frame->id == WEBP_CHUNK_FRAME);
if (!(is_frame || (frame->id == WEBP_CHUNK_TILE))) {
return WEBP_MUX_INVALID_ARGUMENT;
}
if (bitstream->bytes_ == NULL || bitstream->size_ > MAX_CHUNK_PAYLOAD) {
return WEBP_MUX_INVALID_ARGUMENT;
}
if (mux->images_ != NULL) {
const WebPMuxImage* const image = mux->images_;
const uint32_t image_id = (image->header_ != NULL) ?
ChunkGetIdFromTag(image->header_->tag_) : WEBP_CHUNK_IMAGE;
if (image_id != frame->id) {
return WEBP_MUX_INVALID_ARGUMENT; // Conflicting frame types.
}
}
MuxImageInit(&wpi);
err = SetAlphaAndImageChunks(bitstream, copy_data, &wpi);
if (err != WEBP_MUX_OK) goto Err;
assert(wpi.img_ != NULL); // As SetAlphaAndImageChunks() was successful.
{
const int is_lossless = (wpi.img_->tag_ == kChunks[IDX_VP8L].tag);
const int x_offset = frame->x_offset_ & ~1; // Snap offsets to even.
const int y_offset = frame->y_offset_ & ~1;
const int duration = is_frame ? frame->duration_ : 1 /* unused */;
const uint32_t tag = kChunks[is_frame ? IDX_FRAME : IDX_TILE].tag;
WebPData frame_tile;
if (x_offset < 0 || x_offset >= MAX_POSITION_OFFSET ||
y_offset < 0 || y_offset >= MAX_POSITION_OFFSET ||
(duration <= 0 || duration > MAX_DURATION)) {
err = WEBP_MUX_INVALID_ARGUMENT;
goto Err;
}
err = CreateFrameTileData(&wpi.img_->data_, x_offset, y_offset, duration,
is_lossless, is_frame, &frame_tile);
if (err != WEBP_MUX_OK) goto Err;
// Add frame/tile chunk (with copy_data = 1).
err = AddDataToChunkList(&frame_tile, 1, tag, &wpi.header_);
WebPDataClear(&frame_tile); // frame_tile owned by wpi.header_ now.
if (err != WEBP_MUX_OK) goto Err;
}
// Add this WebPMuxImage to mux.
err = MuxImagePush(&wpi, &mux->images_);
if (err != WEBP_MUX_OK) goto Err;
// All is well.
return WEBP_MUX_OK;
Err: // Something bad happened.
MuxImageRelease(&wpi);
return err;
}
WebPMuxError WebPMuxPushTile(WebPMux* mux,
const WebPMuxFrameInfo* tile,
int copy_data) {
return MuxPushFrameTileInternal(mux, tile /*unused duration*/, copy_data,
kChunks[IDX_TILE].tag);
WebPMuxError WebPMuxSetLoopCount(WebPMux* mux, int loop_count) {
WebPMuxError err;
uint8_t data[LOOP_CHUNK_SIZE];
if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT;
if (loop_count >= MAX_LOOP_COUNT) return WEBP_MUX_INVALID_ARGUMENT;
// Delete the existing LOOP chunk(s).
err = DeleteLoopCount(mux);
if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err;
// Add the given loop count.
PutLE16(data, loop_count);
return MuxAddChunk(mux, 1, kChunks[IDX_LOOP].tag, data, sizeof(data), 1);
}
//------------------------------------------------------------------------------
// Delete API(s).
WebPMuxError WebPMuxDeleteImage(WebPMux* mux) {
WebPMuxError err;
if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT;
err = MuxValidateForImage(mux);
if (err != WEBP_MUX_OK) return err;
// All well, delete image.
MuxImageDeleteAll(&mux->images_);
return WEBP_MUX_OK;
}
WebPMuxError WebPMuxDeleteChunk(WebPMux* mux, const char fourcc[4]) {
return MuxDeleteAllNamedData(mux, ChunkGetTagFromFourCC(fourcc));
}
static WebPMuxError DeleteFrameTileInternal(WebPMux* const mux, uint32_t nth,
CHUNK_INDEX idx) {
const WebPChunkId id = kChunks[idx].id;
if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT;
assert(idx == IDX_FRAME || idx == IDX_TILE);
return MuxImageDeleteNth(&mux->images_, nth, id);
}
WebPMuxError WebPMuxDeleteFrame(WebPMux* mux, uint32_t nth) {
return DeleteFrameTileInternal(mux, nth, IDX_FRAME);
}
WebPMuxError WebPMuxDeleteTile(WebPMux* mux, uint32_t nth) {
return DeleteFrameTileInternal(mux, nth, IDX_TILE);
if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT;
return MuxImageDeleteNth(&mux->images_, nth);
}
//------------------------------------------------------------------------------