78 lines
2.7 KiB
C
78 lines
2.7 KiB
C
/*
|
|
* 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 FFMPEG_PARSER_H
|
|
#define FFMPEG_PARSER_H
|
|
|
|
#include "ac3.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
|
|
} ParseContext;
|
|
|
|
struct MpegEncContext;
|
|
|
|
typedef struct ParseContext1{
|
|
ParseContext pc;
|
|
/* XXX/FIXME PC1 vs. PC */
|
|
/* MPEG2 specific */
|
|
AVRational frame_rate;
|
|
int progressive_sequence;
|
|
int width, height;
|
|
|
|
/* XXX: suppress that, needed by MPEG4 */
|
|
struct MpegEncContext *enc;
|
|
int first_picture;
|
|
} ParseContext1;
|
|
|
|
#define END_NOT_FOUND (-100)
|
|
|
|
int ff_combine_frame(ParseContext *pc, int next, 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);
|
|
void ff_parse1_close(AVCodecParserContext *s);
|
|
|
|
/* h263dec.c */
|
|
int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
|
|
|
|
/**
|
|
* Parses AC-3 frame header.
|
|
* Parses the header up to the lfeon element, which is the first 52 or 54 bits
|
|
* depending on the audio coding mode.
|
|
* @param buf[in] Array containing the first 7 bytes of the frame.
|
|
* @param hdr[out] Pointer to struct where header info is written.
|
|
* @return Returns 0 on success, -1 if there is a sync word mismatch,
|
|
* -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate)
|
|
* element is invalid, or -4 if the frmsizecod (bit rate) element is invalid.
|
|
*/
|
|
int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr);
|
|
|
|
#endif /* !FFMPEG_PARSER_H */
|