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49 lines
1.7 KiB
49 lines
1.7 KiB
/* |
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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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