mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-22 07:20:45 +00:00
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
|
/*
|
||
|
|
* MPEG-4 Audio common header
|
||
|
|
* Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@free.fr>
|
||
|
|
*
|
||
|
|
* 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_MPEG4AUDIO_H
|
||
|
|
#define FFMPEG_MPEG4AUDIO_H
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
int object_type;
|
||
|
|
int sampling_index;
|
||
|
|
int sample_rate;
|
||
|
|
int chan_config;
|
||
|
|
int sbr; //< -1 implicit, 1 presence
|
||
|
|
int ext_object_type;
|
||
|
|
int ext_sampling_index;
|
||
|
|
int ext_sample_rate;
|
||
|
|
} MPEG4AudioConfig;
|
||
|
|
|
||
|
|
extern const int ff_mpeg4audio_sample_rates[16];
|
||
|
|
extern const uint8_t ff_mpeg4audio_channels[8];
|
||
|
|
/**
|
||
|
|
* Parse MPEG-4 systems extradata to retrieve audio configuration.
|
||
|
|
* @param[in] c MPEG4AudioConfig structure to fill.
|
||
|
|
* @param[in] buf Extradata from container.
|
||
|
|
* @param[in] buf_size Extradata size.
|
||
|
|
* @return On error -1 is returned, on success AudioSpecificConfig bit index in extradata.
|
||
|
|
*/
|
||
|
|
int ff_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf, int buf_size);
|
||
|
|
|
||
|
|
#endif /* FFMPEG_MPEGAUDIO_H */
|