ffmpeg/libavcodec/audioconvert.h

   1 /*
   2  * audio conversion
   3  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
   4  * Copyright (c) 2008 Peter Ross
   5  *
   6  * This file is part of FFmpeg.
   7  *
   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.
  12  *
  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.
  17  *
  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
  21  */
  22
  23 #ifndef AVCODEC_AUDIOCONVERT_H
  24 #define AVCODEC_AUDIOCONVERT_H
  25
  26 /**
  27  * @file
  28  * Audio format conversion routines
  29  * This interface is deprecated and will be dropped in a future
  30  * version. You should use the libswresample library instead.
  31  */
  32
  33 #if FF_API_AUDIO_CONVERT
  34
  35 #include "libavutil/cpu.h"
  36 #include "avcodec.h"
  37 #include "libavutil/channel_layout.h"
  38
  39 struct AVAudioConvert;
  40 typedef struct AVAudioConvert AVAudioConvert;
  41
  42 /**
  43  * Create an audio sample format converter context
  44  * @param out_fmt Output sample format
  45  * @param out_channels Number of output channels
  46  * @param in_fmt Input sample format
  47  * @param in_channels Number of input channels
  48  * @param[in] matrix Channel mixing matrix (of dimension in_channel*out_channels). Set to NULL to ignore.
  49  * @param flags See AV_CPU_FLAG_xx
  50  * @return NULL on error
  51  * @deprecated See libswresample
  52  */
  53
  54 attribute_deprecated
  55 AVAudioConvert *av_audio_convert_alloc(enum AVSampleFormat out_fmt, int out_channels,
  56                                        enum AVSampleFormat in_fmt, int in_channels,
  57                                        const float *matrix, int flags);
  58
  59 /**
  60  * Free audio sample format converter context
  61  * @deprecated See libswresample
  62  */
  63
  64 attribute_deprecated
  65 void av_audio_convert_free(AVAudioConvert *ctx);
  66
  67 /**
  68  * Convert between audio sample formats
  69  * @param[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel.
  70  * @param[in] out_stride distance between consecutive output samples (measured in bytes)
  71  * @param[in] in array of input buffers for each channel
  72  * @param[in] in_stride distance between consecutive input samples (measured in bytes)
  73  * @param len length of audio frame size (measured in samples)
  74  * @deprecated See libswresample
  75  */
  76
  77 attribute_deprecated
  78 int av_audio_convert(AVAudioConvert *ctx,
  79                            void * const out[6], const int out_stride[6],
  80                      const void * const  in[6], const int  in_stride[6], int len);
  81
  82 #endif /* FF_API_AUDIO_CONVERT */
  83
  84 #endif /* AVCODEC_AUDIOCONVERT_H */