xiph.h (1781B)
1 /* 2 * Copyright (C) 2007 The FFmpeg Project 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 #ifndef AVCODEC_XIPH_H 22 #define AVCODEC_XIPH_H 23 24 #include <stdint.h> 25 26 /** 27 * Split a single extradata buffer into the three headers that most 28 * Xiph codecs use. (e.g. Theora and Vorbis) 29 * Works both with Matroska's packing and lavc's packing. 30 * 31 * @param[in] extradata The single chunk that combines all three headers 32 * @param[in] extradata_size The size of the extradata buffer 33 * @param[in] first_header_size The size of the first header, used to 34 * differentiate between the Matroska packing and lavc packing. 35 * @param[out] header_start Pointers to the start of the three separate headers. 36 * @param[out] header_len The sizes of each of the three headers. 37 * @return On error a negative value is returned, on success zero. 38 */ 39 int avpriv_split_xiph_headers(const uint8_t *extradata, int extradata_size, 40 int first_header_size, const uint8_t *header_start[3], 41 int header_len[3]); 42 43 #endif /* AVCODEC_XIPH_H */