/*
  * audio conversion
  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
  * Copyright (c) 2008 Peter Ross
  *
  * 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 SWRESAMPLE_AUDIOCONVERT_H
 #define SWRESAMPLE_AUDIOCONVERT_H

 
 /**
  * @file
  * Audio format conversion routines
  */
 
 
 #include "swresample_internal.h"
 #include "libavutil/cpu.h"
 

 
 typedef void (conv_func_type)(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end);

 typedef void (simd_func_type)(uint8_t **dst, const uint8_t **src, int len);

 
 typedef struct AudioConvert {
     int channels;

     int  in_simd_align_mask;
     int out_simd_align_mask;

     conv_func_type *conv_f;

     simd_func_type *simd_f;

     const int *ch_map;
     uint8_t silence[8]; ///< silence input sample
 }AudioConvert;

 
 /**
  * Create an audio sample format converter context
  * @param out_fmt Output sample format
  * @param in_fmt Input sample format
  * @param channels Number of channels
  * @param flags See AV_CPU_FLAG_xx

  * @param ch_map list of the channels id to pick from the source stream, NULL
  *               if all channels must be selected

  * @return NULL on error
  */

 AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt,
                                        enum AVSampleFormat in_fmt,
                                        int channels, const int *ch_map,
                                        int flags);

 
 /**
  * Free audio sample format converter context.
  * and set the pointer to NULL
  */

 void swri_audio_convert_free(AudioConvert **ctx);

 
 /**
  * Convert between audio sample formats
  * @param[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel.
  * @param[in] in array of input buffers for each channel
  * @param len length of audio frame size (measured in samples)
  */

 int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len);

 #endif /* SWRESAMPLE_AUDIOCONVERT_H */