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 39struct AVAudioConvert; 40typedef 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 54attribute_deprecated 55AVAudioConvert *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 64attribute_deprecated 65void 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 77attribute_deprecated 78int 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 */ 85