mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
2.7 KiB
77 lines
2.7 KiB
/* |
|
* 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 */
|
|
|