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libavcodec/audioconvert.h

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00001 /*
00002  * audio conversion
00003  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
00004  * Copyright (c) 2008 Peter Ross
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #ifndef AVCODEC_AUDIOCONVERT_H
00024 #define AVCODEC_AUDIOCONVERT_H
00025 
00032 #include "avcodec.h"
00033 
00034 
00045 void avcodec_sample_fmt_string(char *buf, int buf_size, int sample_fmt);
00046 
00050 const char *avcodec_get_sample_fmt_name(int sample_fmt);
00051 
00055 enum SampleFormat avcodec_get_sample_fmt(const char* name);
00056 
00060 const char *avcodec_get_channel_name(int channel_id);
00061 
00065 void avcodec_get_channel_layout_string(char *buf, int buf_size, int nb_channels, int64_t channel_layout);
00066 
00074 int64_t avcodec_guess_channel_layout(int nb_channels, enum CodecID codec_id, const char *fmt_name);
00075 
00079 int avcodec_channel_layout_num_channels(int64_t channel_layout);
00080 
00081 struct AVAudioConvert;
00082 typedef struct AVAudioConvert AVAudioConvert;
00083 
00094 AVAudioConvert *av_audio_convert_alloc(enum SampleFormat out_fmt, int out_channels,
00095                                        enum SampleFormat in_fmt, int in_channels,
00096                                        const float *matrix, int flags);
00097 
00101 void av_audio_convert_free(AVAudioConvert *ctx);
00102 
00111 int av_audio_convert(AVAudioConvert *ctx,
00112                            void * const out[6], const int out_stride[6],
00113                      const void * const  in[6], const int  in_stride[6], int len);
00114 
00115 #endif /* AVCODEC_AUDIOCONVERT_H */

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