From 4d34bb19c16aa271ce65a4726325cb809a29d51e Mon Sep 17 00:00:00 2001 From: Baptiste Coudurier Date: Tue, 1 Apr 2008 12:01:40 +0000 Subject: mpeg4audio common code Originally committed as revision 12662 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/mpeg4audio.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 libavcodec/mpeg4audio.h (limited to 'libavcodec/mpeg4audio.h') diff --git a/libavcodec/mpeg4audio.h b/libavcodec/mpeg4audio.h new file mode 100644 index 0000000000..06a1a366db --- /dev/null +++ b/libavcodec/mpeg4audio.h @@ -0,0 +1,49 @@ +/* + * MPEG-4 Audio common header + * Copyright (c) 2008 Baptiste Coudurier + * + * 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 + +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 */ -- cgit v1.2.3