11e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Copyright 2012 Google Inc. All Rights Reserved. 21e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// 31e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// This code is licensed under the same terms as WebM: 41e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Software License Agreement: http://www.webmproject.org/license/software/ 51e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ 61e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// ----------------------------------------------------------------------------- 71e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// 81e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Demux API. 91e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Enables extraction of image and extended format data from WebP files. 101e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 111e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Code Example: Demuxing WebP data to extract all the frames, ICC profile 121e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// and EXIF/XMP metadata. 131e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// 141e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// WebPDemuxer* demux = WebPDemux(&webp_data); 151e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// 161e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// uint32_t width = WebPDemuxGetI(demux, WEBP_FF_CANVAS_WIDTH); 171e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// uint32_t height = WebPDemuxGetI(demux, WEBP_FF_CANVAS_HEIGHT); 181e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// // ... (Get information about the features present in the WebP file). 191e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// uint32_t flags = WebPDemuxGetI(demux, WEBP_FF_FORMAT_FLAGS); 201e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// 211e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// // ... (Iterate over all frames). 221e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// WebPIterator iter; 231e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// if (WebPDemuxGetFrame(demux, 1, &iter)) { 241e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// do { 251e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// // ... (Consume 'iter'; e.g. Decode 'iter.fragment' with WebPDecode(), 261e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// // ... and get other frame properties like width, height, offsets etc. 271e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// // ... see 'struct WebPIterator' below for more info). 281e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// } while (WebPDemuxNextFrame(&iter)); 291e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// WebPDemuxReleaseIterator(&iter); 301e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// } 311e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// 321e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// // ... (Extract metadata). 331e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// WebPChunkIterator chunk_iter; 341e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// if (flags & ICCP_FLAG) WebPDemuxGetChunk(demux, "ICCP", 1, &chunk_iter); 351e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// // ... (Consume the ICC profile in 'chunk_iter.chunk'). 361e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// WebPDemuxReleaseChunkIterator(&chunk_iter); 371e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// if (flags & EXIF_FLAG) WebPDemuxGetChunk(demux, "EXIF", 1, &chunk_iter); 381e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// // ... (Consume the EXIF metadata in 'chunk_iter.chunk'). 391e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// WebPDemuxReleaseChunkIterator(&chunk_iter); 401e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// if (flags & XMP_FLAG) WebPDemuxGetChunk(demux, "XMP ", 1, &chunk_iter); 411e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// // ... (Consume the XMP metadata in 'chunk_iter.chunk'). 421e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// WebPDemuxReleaseChunkIterator(&chunk_iter); 431e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// WebPDemuxDelete(demux); 441e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 451e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#ifndef WEBP_WEBP_DEMUX_H_ 461e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#define WEBP_WEBP_DEMUX_H_ 471e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 481e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#include "./format_constants.h" 491e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#include "./mux_types.h" 501e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 511e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#if defined(__cplusplus) || defined(c_plusplus) 521e7bf8805bd030c19924a5306837ecd72c295751Vikas Aroraextern "C" { 531e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#endif 541e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 551e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#define WEBP_DEMUX_ABI_VERSION 0x0100 // MAJOR(8b) + MINOR(8b) 561e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 571e7bf8805bd030c19924a5306837ecd72c295751Vikas Aroratypedef struct WebPDemuxer WebPDemuxer; 581e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#if !(defined(__cplusplus) || defined(c_plusplus)) 591e7bf8805bd030c19924a5306837ecd72c295751Vikas Aroratypedef enum WebPDemuxState WebPDemuxState; 601e7bf8805bd030c19924a5306837ecd72c295751Vikas Aroratypedef enum WebPFormatFeature WebPFormatFeature; 611e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#endif 621e7bf8805bd030c19924a5306837ecd72c295751Vikas Aroratypedef struct WebPIterator WebPIterator; 631e7bf8805bd030c19924a5306837ecd72c295751Vikas Aroratypedef struct WebPChunkIterator WebPChunkIterator; 641e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 651e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora//------------------------------------------------------------------------------ 661e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 671e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Returns the version number of the demux library, packed in hexadecimal using 681e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// 8bits for each of major/minor/revision. E.g: v2.5.7 is 0x020507. 691e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(int) WebPGetDemuxVersion(void); 701e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 711e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora//------------------------------------------------------------------------------ 721e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Life of a Demux object 731e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 741e7bf8805bd030c19924a5306837ecd72c295751Vikas Aroraenum WebPDemuxState { 751e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WEBP_DEMUX_PARSING_HEADER, // Not enough data to parse full header. 761e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WEBP_DEMUX_PARSED_HEADER, // Header parsing complete, data may be available. 771e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WEBP_DEMUX_DONE // Entire file has been parsed. 781e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora}; 791e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 801e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Internal, version-checked, entry point 811e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(WebPDemuxer*) WebPDemuxInternal( 821e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora const WebPData*, int, WebPDemuxState*, int); 831e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 841e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Parses the WebP file given by 'data'. 851e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// A complete WebP file must be present in 'data' for the function to succeed. 861e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Returns a WebPDemuxer object on successful parse, NULL otherwise. 871e7bf8805bd030c19924a5306837ecd72c295751Vikas Arorastatic WEBP_INLINE WebPDemuxer* WebPDemux(const WebPData* data) { 881e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora return WebPDemuxInternal(data, 0, NULL, WEBP_DEMUX_ABI_VERSION); 891e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora} 901e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 911e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Parses the WebP file given by 'data'. 921e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// If 'state' is non-NULL it will be set to indicate the status of the demuxer. 931e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Returns a WebPDemuxer object on successful parse, NULL otherwise. 941e7bf8805bd030c19924a5306837ecd72c295751Vikas Arorastatic WEBP_INLINE WebPDemuxer* WebPDemuxPartial( 951e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora const WebPData* data, WebPDemuxState* state) { 961e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora return WebPDemuxInternal(data, 1, state, WEBP_DEMUX_ABI_VERSION); 971e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora} 981e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 991e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Frees memory associated with 'dmux'. 1001e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(void) WebPDemuxDelete(WebPDemuxer* dmux); 1011e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1021e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora//------------------------------------------------------------------------------ 1031e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Data/information extraction. 1041e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1051e7bf8805bd030c19924a5306837ecd72c295751Vikas Aroraenum WebPFormatFeature { 1061e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WEBP_FF_FORMAT_FLAGS, // Extended format flags present in the 'VP8X' chunk. 1071e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WEBP_FF_CANVAS_WIDTH, 1081e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WEBP_FF_CANVAS_HEIGHT, 1091e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WEBP_FF_LOOP_COUNT, 1101e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WEBP_FF_BACKGROUND_COLOR, 1111e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WEBP_FF_FRAME_COUNT // Number of frames present in the demux object. 1121e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora // In case of a partial demux, this is the number of 1131e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora // frames seen so far, with the last frame possibly 1141e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora // being partial. 1151e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora}; 1161e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1171e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Get the 'feature' value from the 'dmux'. 1181e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// NOTE: values are only valid if WebPDemux() was used or WebPDemuxPartial() 1191e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// returned a state > WEBP_DEMUX_PARSING_HEADER. 1201e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(uint32_t) WebPDemuxGetI( 1211e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora const WebPDemuxer* dmux, WebPFormatFeature feature); 1221e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1231e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora//------------------------------------------------------------------------------ 1241e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Frame iteration. 1251e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1261e7bf8805bd030c19924a5306837ecd72c295751Vikas Arorastruct WebPIterator { 1271e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora int frame_num; 1281e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora int num_frames; // equivalent to WEBP_FF_FRAME_COUNT. 1291e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora int fragment_num; 1301e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora int num_fragments; 1311e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora int x_offset, y_offset; // offset relative to the canvas. 1321e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora int width, height; // dimensions of this frame or fragment. 1331e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora int duration; // display duration in milliseconds. 1341e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WebPMuxAnimDispose dispose_method; // dispose method for the frame. 1351e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora int complete; // true if 'fragment' contains a full frame. partial images 1361e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora // may still be decoded with the WebP incremental decoder. 1371e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WebPData fragment; // The frame or fragment given by 'frame_num' and 1381e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora // 'fragment_num'. 1391e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1401e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora uint32_t pad[4]; // padding for later use. 1411e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora void* private_; // for internal use only. 1421e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora}; 1431e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1441e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Retrieves frame 'frame_number' from 'dmux'. 1451e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// 'iter->fragment' points to the first fragment on return from this function. 1461e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Individual fragments may be extracted using WebPDemuxSetFragment(). 1471e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Setting 'frame_number' equal to 0 will return the last frame of the image. 1481e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Returns false if 'dmux' is NULL or frame 'frame_number' is not present. 1491e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Call WebPDemuxReleaseIterator() when use of the iterator is complete. 1501e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// NOTE: 'dmux' must persist for the lifetime of 'iter'. 1511e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(int) WebPDemuxGetFrame( 1521e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora const WebPDemuxer* dmux, int frame_number, WebPIterator* iter); 1531e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1541e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Sets 'iter->fragment' to point to the next ('iter->frame_num' + 1) or 1551e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// previous ('iter->frame_num' - 1) frame. These functions do not loop. 1561e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Returns true on success, false otherwise. 1571e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(int) WebPDemuxNextFrame(WebPIterator* iter); 1581e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(int) WebPDemuxPrevFrame(WebPIterator* iter); 1591e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1601e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Sets 'iter->fragment' to reflect fragment number 'fragment_num'. 1611e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Returns true if fragment 'fragment_num' is present, false otherwise. 1621e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(int) WebPDemuxSelectFragment(WebPIterator* iter, int fragment_num); 1631e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1641e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Releases any memory associated with 'iter'. 1651e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Must be called before any subsequent calls to WebPDemuxGetChunk() on the same 1661e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// iter. Also, must be called before destroying the associated WebPDemuxer with 1671e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// WebPDemuxDelete(). 1681e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(void) WebPDemuxReleaseIterator(WebPIterator* iter); 1691e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1701e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora//------------------------------------------------------------------------------ 1711e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Chunk iteration. 1721e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1731e7bf8805bd030c19924a5306837ecd72c295751Vikas Arorastruct WebPChunkIterator { 1741e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora // The current and total number of chunks with the fourcc given to 1751e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora // WebPDemuxGetChunk(). 1761e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora int chunk_num; 1771e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora int num_chunks; 1781e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WebPData chunk; // The payload of the chunk. 1791e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1801e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora uint32_t pad[6]; // padding for later use 1811e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora void* private_; 1821e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora}; 1831e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1841e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Retrieves the 'chunk_number' instance of the chunk with id 'fourcc' from 1851e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// 'dmux'. 1861e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// 'fourcc' is a character array containing the fourcc of the chunk to return, 1871e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// e.g., "ICCP", "XMP ", "EXIF", etc. 1881e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Setting 'chunk_number' equal to 0 will return the last chunk in a set. 1891e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Returns true if the chunk is found, false otherwise. Image related chunk 1901e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// payloads are accessed through WebPDemuxGetFrame() and related functions. 1911e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Call WebPDemuxReleaseChunkIterator() when use of the iterator is complete. 1921e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// NOTE: 'dmux' must persist for the lifetime of the iterator. 1931e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(int) WebPDemuxGetChunk(const WebPDemuxer* dmux, 1941e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora const char fourcc[4], int chunk_number, 1951e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora WebPChunkIterator* iter); 1961e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1971e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Sets 'iter->chunk' to point to the next ('iter->chunk_num' + 1) or previous 1981e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// ('iter->chunk_num' - 1) chunk. These functions do not loop. 1991e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Returns true on success, false otherwise. 2001e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(int) WebPDemuxNextChunk(WebPChunkIterator* iter); 2011e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(int) WebPDemuxPrevChunk(WebPChunkIterator* iter); 2021e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 2031e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Releases any memory associated with 'iter'. 2041e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Must be called before destroying the associated WebPDemuxer with 2051e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// WebPDemuxDelete(). 2061e7bf8805bd030c19924a5306837ecd72c295751Vikas AroraWEBP_EXTERN(void) WebPDemuxReleaseChunkIterator(WebPChunkIterator* iter); 2071e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 2081e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora//------------------------------------------------------------------------------ 2091e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 2101e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#if defined(__cplusplus) || defined(c_plusplus) 2111e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora} // extern "C" 2121e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#endif 2131e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 2141e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#endif /* WEBP_WEBP_DEMUX_H_ */ 215