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50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/*
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* MPEG-4 Audio common header
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* Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@free.fr>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef FFMPEG_MPEG4AUDIO_H
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#define FFMPEG_MPEG4AUDIO_H
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#include <stdint.h>
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typedef struct {
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int object_type;
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int sampling_index;
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int sample_rate;
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int chan_config;
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int sbr; //< -1 implicit, 1 presence
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int ext_object_type;
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int ext_sampling_index;
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int ext_sample_rate;
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} MPEG4AudioConfig;
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extern const int ff_mpeg4audio_sample_rates[16];
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extern const uint8_t ff_mpeg4audio_channels[8];
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/**
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* Parse MPEG-4 systems extradata to retrieve audio configuration.
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* @param[in] c MPEG4AudioConfig structure to fill.
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* @param[in] buf Extradata from container.
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* @param[in] buf_size Extradata size.
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* @return On error -1 is returned, on success AudioSpecificConfig bit index in extradata.
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*/
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int ff_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf, int buf_size);
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#endif /* FFMPEG_MPEGAUDIO_H */
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