githubmirror/FFmpeg

libavformat/mpeg.h
73 строки2 KB
Clément Bœsch
Merge commit '41ed7ab45fc693f7d7fc35664c0233f4c32d69bb'
21 июн 2016, 22:55
21 июн 2016, 22:558ef57a0
/*
 * MPEG-1/2 muxer and demuxer common defines
 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
 *
 * 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 AVFORMAT_MPEG_H
#define AVFORMAT_MPEG_H

#include <stdint.h>
#include "libavutil/intreadwrite.h"

#define PACK_START_CODE             ((unsigned int)0x000001ba)
#define SYSTEM_HEADER_START_CODE    ((unsigned int)0x000001bb)
#define SEQUENCE_END_CODE           ((unsigned int)0x000001b7)
#define PACKET_START_CODE_MASK      ((unsigned int)0xffffff00)
#define PACKET_START_CODE_PREFIX    ((unsigned int)0x00000100)
#define ISO_11172_END_CODE          ((unsigned int)0x000001b9)

/* mpeg2 */
#define PROGRAM_STREAM_MAP 0x1bc
#define PRIVATE_STREAM_1   0x1bd
#define PADDING_STREAM     0x1be
#define PRIVATE_STREAM_2   0x1bf

#define AUDIO_ID 0xc0
#define VIDEO_ID 0xe0
#define H264_ID  0xe2
#define AC3_ID   0x80
#define DTS_ID   0x88
#define LPCM_ID  0xa0
#define SUB_ID   0x20

#define STREAM_TYPE_VIDEO_MPEG1     0x01
#define STREAM_TYPE_VIDEO_MPEG2     0x02
#define STREAM_TYPE_AUDIO_MPEG1     0x03
#define STREAM_TYPE_AUDIO_MPEG2     0x04
#define STREAM_TYPE_PRIVATE_SECTION 0x05
#define STREAM_TYPE_PRIVATE_DATA    0x06
#define STREAM_TYPE_AUDIO_AAC       0x0f
#define STREAM_TYPE_VIDEO_MPEG4     0x10
#define STREAM_TYPE_VIDEO_H264      0x1b
#define STREAM_TYPE_VIDEO_CAVS      0x42

#define STREAM_TYPE_AUDIO_AC3       0x81

static const int lpcm_freq_tab[4] = { 48000, 96000, 44100, 32000 };

/**
 * Parse MPEG-PES five-byte timestamp
 */
static inline int64_t ff_parse_pes_pts(const uint8_t *buf) {
    return (int64_t)(*buf & 0x0e) << 29 |
            (AV_RB16(buf+1) >> 1) << 15 |
             AV_RB16(buf+3) >> 1;
}

#endif /* AVFORMAT_MPEG_H */