aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* AVCodecParser prototypes and definitions
* Copyright (c) 2003 Fabrice Bellard
* Copyright (c) 2003 Michael Niedermayer
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_PARSER_H
#define AVCODEC_PARSER_H
#include "avcodec.h"
typedef struct ParseContext{
uint8_t *buffer;
int index;
int last_index;
unsigned int buffer_size;
uint32_t state; ///< contains the last few bytes in MSB order
int frame_start_found;
int overread; ///< the number of bytes which where irreversibly read from the next frame
int overread_index; ///< the index into ParseContext.buffer of the overread bytes
uint64_t state64; ///< contains the last 8 bytes in MSB order
} ParseContext;
#define END_NOT_FOUND (-100)
/**
* Combine the (truncated) bitstream to a complete frame.
* @return -1 if no complete frame could be created,
* AVERROR(ENOMEM) if there was a memory allocation error
*/
int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size);
int ff_mpeg4video_split(AVCodecContext *avctx, const uint8_t *buf,
int buf_size);
void ff_parse_close(AVCodecParserContext *s);
/**
* Fetch timestamps for a specific byte within the current access unit.
* @param off byte position within the access unit
* @param remove Found timestamps will be removed if set to 1, kept if set to 0.
* @param fuzzy Only use found value if it is more informative than what we already have
*/
void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove, int fuzzy);
#endif /* AVCODEC_PARSER_H */
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