parser.h (2240B)
1 /* 2 * AVCodecParser prototypes and definitions 3 * Copyright (c) 2003 Fabrice Bellard 4 * Copyright (c) 2003 Michael Niedermayer 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23 #ifndef AVCODEC_PARSER_H 24 #define AVCODEC_PARSER_H 25 26 #include "avcodec.h" 27 28 typedef struct ParseContext{ 29 uint8_t *buffer; 30 int index; 31 int last_index; 32 unsigned int buffer_size; 33 uint32_t state; ///< contains the last few bytes in MSB order 34 int frame_start_found; 35 int overread; ///< the number of bytes which where irreversibly read from the next frame 36 int overread_index; ///< the index into ParseContext.buffer of the overread bytes 37 uint64_t state64; ///< contains the last 8 bytes in MSB order 38 } ParseContext; 39 40 #define END_NOT_FOUND (-100) 41 42 /** 43 * Combine the (truncated) bitstream to a complete frame. 44 * @return -1 if no complete frame could be created, 45 * AVERROR(ENOMEM) if there was a memory allocation error 46 */ 47 int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size); 48 void ff_parse_close(AVCodecParserContext *s); 49 50 /** 51 * Fetch timestamps for a specific byte within the current access unit. 52 * @param off byte position within the access unit 53 * @param remove Found timestamps will be removed if set to 1, kept if set to 0. 54 * @param fuzzy Only use found value if it is more informative than what we already have 55 */ 56 void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove, int fuzzy); 57 58 #endif /* AVCODEC_PARSER_H */