/* * 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 */