3 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 * Copyright (c) 2008 Peter Ross
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #ifndef AVCODEC_AUDIOCONVERT_H
24 #define AVCODEC_AUDIOCONVERT_H
30 * Audio format conversion routines
31 * This interface is deprecated and will be dropped in a future
32 * version. You should use the libswresample library instead.
35 #if FF_API_AUDIO_CONVERT
37 #include "libavutil/cpu.h"
39 #include "libavutil/channel_layout.h"
41 struct AVAudioConvert;
42 typedef struct AVAudioConvert AVAudioConvert;
45 * Create an audio sample format converter context
46 * @param out_fmt Output sample format
47 * @param out_channels Number of output channels
48 * @param in_fmt Input sample format
49 * @param in_channels Number of input channels
50 * @param[in] matrix Channel mixing matrix (of dimension in_channel*out_channels). Set to NULL to ignore.
51 * @param flags See AV_CPU_FLAG_xx
52 * @return NULL on error
53 * @deprecated See libswresample
57 AVAudioConvert *av_audio_convert_alloc(enum AVSampleFormat out_fmt, int out_channels,
58 enum AVSampleFormat in_fmt, int in_channels,
59 const float *matrix, int flags);
62 * Free audio sample format converter context
63 * @deprecated See libswresample
67 void av_audio_convert_free(AVAudioConvert *ctx);
70 * Convert between audio sample formats
71 * @param[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel.
72 * @param[in] out_stride distance between consecutive output samples (measured in bytes)
73 * @param[in] in array of input buffers for each channel
74 * @param[in] in_stride distance between consecutive input samples (measured in bytes)
75 * @param len length of audio frame size (measured in samples)
76 * @deprecated See libswresample
80 int av_audio_convert(AVAudioConvert *ctx,
81 void * const out[6], const int out_stride[6],
82 const void * const in[6], const int in_stride[6], int len);
84 #endif /* FF_API_AUDIO_CONVERT */
86 #endif /* AVCODEC_AUDIOCONVERT_H */