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Sync libwebp sources with https://chromium.googlesource.com/webm/libwebp/+/v1.0.0
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JustOff
Roy Tam
parent
96f65ed0eb
commit
57e9b57974
86 changed files with 3796 additions and 2250 deletions
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@ -71,7 +71,7 @@ typedef struct WebPAnimDecoderOptions WebPAnimDecoderOptions;
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// Returns the version number of the demux library, packed in hexadecimal using
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// 8bits for each of major/minor/revision. E.g: v2.5.7 is 0x020507.
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WEBP_EXTERN(int) WebPGetDemuxVersion(void);
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WEBP_EXTERN int WebPGetDemuxVersion(void);
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//------------------------------------------------------------------------------
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// Life of a Demux object
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@ -85,7 +85,7 @@ typedef enum WebPDemuxState {
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} WebPDemuxState;
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// Internal, version-checked, entry point
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WEBP_EXTERN(WebPDemuxer*) WebPDemuxInternal(
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WEBP_EXTERN WebPDemuxer* WebPDemuxInternal(
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const WebPData*, int, WebPDemuxState*, int);
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// Parses the full WebP file given by 'data'. For single images the WebP file
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@ -109,27 +109,32 @@ static WEBP_INLINE WebPDemuxer* WebPDemuxPartial(
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}
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// Frees memory associated with 'dmux'.
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WEBP_EXTERN(void) WebPDemuxDelete(WebPDemuxer* dmux);
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WEBP_EXTERN void WebPDemuxDelete(WebPDemuxer* dmux);
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//------------------------------------------------------------------------------
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// Data/information extraction.
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typedef enum WebPFormatFeature {
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WEBP_FF_FORMAT_FLAGS, // Extended format flags present in the 'VP8X' chunk.
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WEBP_FF_FORMAT_FLAGS, // bit-wise combination of WebPFeatureFlags
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// corresponding to the 'VP8X' chunk (if present).
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WEBP_FF_CANVAS_WIDTH,
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WEBP_FF_CANVAS_HEIGHT,
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WEBP_FF_LOOP_COUNT,
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WEBP_FF_BACKGROUND_COLOR,
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WEBP_FF_FRAME_COUNT // Number of frames present in the demux object.
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// In case of a partial demux, this is the number of
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// frames seen so far, with the last frame possibly
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// being partial.
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WEBP_FF_LOOP_COUNT, // only relevant for animated file
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WEBP_FF_BACKGROUND_COLOR, // idem.
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WEBP_FF_FRAME_COUNT // Number of frames present in the demux object.
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// In case of a partial demux, this is the number
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// of frames seen so far, with the last frame
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// possibly being partial.
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} WebPFormatFeature;
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// Get the 'feature' value from the 'dmux'.
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// NOTE: values are only valid if WebPDemux() was used or WebPDemuxPartial()
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// returned a state > WEBP_DEMUX_PARSING_HEADER.
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WEBP_EXTERN(uint32_t) WebPDemuxGetI(
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// If 'feature' is WEBP_FF_FORMAT_FLAGS, the returned value is a bit-wise
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// combination of WebPFeatureFlags values.
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// If 'feature' is WEBP_FF_LOOP_COUNT, WEBP_FF_BACKGROUND_COLOR, the returned
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// value is only meaningful if the bitstream is animated.
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WEBP_EXTERN uint32_t WebPDemuxGetI(
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const WebPDemuxer* dmux, WebPFormatFeature feature);
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//------------------------------------------------------------------------------
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@ -159,20 +164,20 @@ struct WebPIterator {
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// Returns false if 'dmux' is NULL or frame 'frame_number' is not present.
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// Call WebPDemuxReleaseIterator() when use of the iterator is complete.
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// NOTE: 'dmux' must persist for the lifetime of 'iter'.
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WEBP_EXTERN(int) WebPDemuxGetFrame(
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WEBP_EXTERN int WebPDemuxGetFrame(
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const WebPDemuxer* dmux, int frame_number, WebPIterator* iter);
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// Sets 'iter->fragment' to point to the next ('iter->frame_num' + 1) or
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// previous ('iter->frame_num' - 1) frame. These functions do not loop.
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// Returns true on success, false otherwise.
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WEBP_EXTERN(int) WebPDemuxNextFrame(WebPIterator* iter);
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WEBP_EXTERN(int) WebPDemuxPrevFrame(WebPIterator* iter);
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WEBP_EXTERN int WebPDemuxNextFrame(WebPIterator* iter);
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WEBP_EXTERN int WebPDemuxPrevFrame(WebPIterator* iter);
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// Releases any memory associated with 'iter'.
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// Must be called before any subsequent calls to WebPDemuxGetChunk() on the same
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// iter. Also, must be called before destroying the associated WebPDemuxer with
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// WebPDemuxDelete().
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WEBP_EXTERN(void) WebPDemuxReleaseIterator(WebPIterator* iter);
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WEBP_EXTERN void WebPDemuxReleaseIterator(WebPIterator* iter);
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//------------------------------------------------------------------------------
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// Chunk iteration.
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@ -197,20 +202,20 @@ struct WebPChunkIterator {
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// payloads are accessed through WebPDemuxGetFrame() and related functions.
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// Call WebPDemuxReleaseChunkIterator() when use of the iterator is complete.
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// NOTE: 'dmux' must persist for the lifetime of the iterator.
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WEBP_EXTERN(int) WebPDemuxGetChunk(const WebPDemuxer* dmux,
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const char fourcc[4], int chunk_number,
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WebPChunkIterator* iter);
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WEBP_EXTERN int WebPDemuxGetChunk(const WebPDemuxer* dmux,
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const char fourcc[4], int chunk_number,
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WebPChunkIterator* iter);
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// Sets 'iter->chunk' to point to the next ('iter->chunk_num' + 1) or previous
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// ('iter->chunk_num' - 1) chunk. These functions do not loop.
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// Returns true on success, false otherwise.
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WEBP_EXTERN(int) WebPDemuxNextChunk(WebPChunkIterator* iter);
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WEBP_EXTERN(int) WebPDemuxPrevChunk(WebPChunkIterator* iter);
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WEBP_EXTERN int WebPDemuxNextChunk(WebPChunkIterator* iter);
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WEBP_EXTERN int WebPDemuxPrevChunk(WebPChunkIterator* iter);
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// Releases any memory associated with 'iter'.
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// Must be called before destroying the associated WebPDemuxer with
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// WebPDemuxDelete().
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WEBP_EXTERN(void) WebPDemuxReleaseChunkIterator(WebPChunkIterator* iter);
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WEBP_EXTERN void WebPDemuxReleaseChunkIterator(WebPChunkIterator* iter);
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//------------------------------------------------------------------------------
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// WebPAnimDecoder API
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@ -252,7 +257,7 @@ struct WebPAnimDecoderOptions {
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};
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// Internal, version-checked, entry point.
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WEBP_EXTERN(int) WebPAnimDecoderOptionsInitInternal(
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WEBP_EXTERN int WebPAnimDecoderOptionsInitInternal(
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WebPAnimDecoderOptions*, int);
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// Should always be called, to initialize a fresh WebPAnimDecoderOptions
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@ -266,7 +271,7 @@ static WEBP_INLINE int WebPAnimDecoderOptionsInit(
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}
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// Internal, version-checked, entry point.
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WEBP_EXTERN(WebPAnimDecoder*) WebPAnimDecoderNewInternal(
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WEBP_EXTERN WebPAnimDecoder* WebPAnimDecoderNewInternal(
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const WebPData*, const WebPAnimDecoderOptions*, int);
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// Creates and initializes a WebPAnimDecoder object.
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@ -301,8 +306,8 @@ struct WebPAnimInfo {
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// info - (out) global information fetched from the animation.
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// Returns:
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// True on success.
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WEBP_EXTERN(int) WebPAnimDecoderGetInfo(const WebPAnimDecoder* dec,
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WebPAnimInfo* info);
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WEBP_EXTERN int WebPAnimDecoderGetInfo(const WebPAnimDecoder* dec,
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WebPAnimInfo* info);
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// Fetch the next frame from 'dec' based on options supplied to
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// WebPAnimDecoderNew(). This will be a fully reconstructed canvas of size
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@ -316,8 +321,8 @@ WEBP_EXTERN(int) WebPAnimDecoderGetInfo(const WebPAnimDecoder* dec,
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// Returns:
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// False if any of the arguments are NULL, or if there is a parsing or
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// decoding error, or if there are no more frames. Otherwise, returns true.
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WEBP_EXTERN(int) WebPAnimDecoderGetNext(WebPAnimDecoder* dec,
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uint8_t** buf, int* timestamp);
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WEBP_EXTERN int WebPAnimDecoderGetNext(WebPAnimDecoder* dec,
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uint8_t** buf, int* timestamp);
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// Check if there are more frames left to decode.
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// Parameters:
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@ -325,7 +330,7 @@ WEBP_EXTERN(int) WebPAnimDecoderGetNext(WebPAnimDecoder* dec,
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// Returns:
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// True if 'dec' is not NULL and some frames are yet to be decoded.
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// Otherwise, returns false.
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WEBP_EXTERN(int) WebPAnimDecoderHasMoreFrames(const WebPAnimDecoder* dec);
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WEBP_EXTERN int WebPAnimDecoderHasMoreFrames(const WebPAnimDecoder* dec);
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// Resets the WebPAnimDecoder object, so that next call to
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// WebPAnimDecoderGetNext() will restart decoding from 1st frame. This would be
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@ -333,7 +338,7 @@ WEBP_EXTERN(int) WebPAnimDecoderHasMoreFrames(const WebPAnimDecoder* dec);
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// info.loop_count times) without destroying and recreating the 'dec' object.
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// Parameters:
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// dec - (in/out) decoder instance to be reset
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WEBP_EXTERN(void) WebPAnimDecoderReset(WebPAnimDecoder* dec);
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WEBP_EXTERN void WebPAnimDecoderReset(WebPAnimDecoder* dec);
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// Grab the internal demuxer object.
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// Getting the demuxer object can be useful if one wants to use operations only
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@ -343,13 +348,13 @@ WEBP_EXTERN(void) WebPAnimDecoderReset(WebPAnimDecoder* dec);
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//
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// Parameters:
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// dec - (in) decoder instance from which the demuxer object is to be fetched.
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WEBP_EXTERN(const WebPDemuxer*) WebPAnimDecoderGetDemuxer(
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WEBP_EXTERN const WebPDemuxer* WebPAnimDecoderGetDemuxer(
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const WebPAnimDecoder* dec);
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// Deletes the WebPAnimDecoder object.
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// Parameters:
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// dec - (in/out) decoder instance to be deleted
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WEBP_EXTERN(void) WebPAnimDecoderDelete(WebPAnimDecoder* dec);
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WEBP_EXTERN void WebPAnimDecoderDelete(WebPAnimDecoder* dec);
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#ifdef __cplusplus
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} // extern "C"
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