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 28typedef 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 40struct MpegEncContext; 41 42typedef struct ParseContext1{ 43 ParseContext pc; 44/* XXX/FIXME PC1 vs. PC */ 45 /* MPEG-2-specific */ 46 AVRational frame_rate; 47 int progressive_sequence; 48 int width, height; 49 50 /* XXX: suppress that, needed by MPEG-4 */ 51 struct MpegEncContext *enc; 52 int first_picture; 53} ParseContext1; 54 55#define END_NOT_FOUND (-100) 56 57int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size); 58int ff_mpeg4video_split(AVCodecContext *avctx, const uint8_t *buf, 59 int buf_size); 60void ff_parse_close(AVCodecParserContext *s); 61void ff_parse1_close(AVCodecParserContext *s); 62 63/** 64 * Fetches timestamps for a specific byte within the current access unit. 65 * @param off byte position within the access unit 66 * @param remove Found timestamps will be removed if set to 1, kept if set to 0. 67 */ 68void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove); 69 70#endif /* AVCODEC_PARSER_H */ 71