yading@11: /*
yading@11:  * audio conversion
yading@11:  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
yading@11:  * Copyright (c) 2008 Peter Ross
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #ifndef SWR_AUDIOCONVERT_H
yading@11: #define SWR_AUDIOCONVERT_H
yading@11: 
yading@11: /**
yading@11:  * @file
yading@11:  * Audio format conversion routines
yading@11:  */
yading@11: 
yading@11: 
yading@11: #include "swresample_internal.h"
yading@11: #include "libavutil/cpu.h"
yading@11: 
yading@11: 
yading@11: typedef void (conv_func_type)(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end);
yading@11: typedef void (simd_func_type)(uint8_t **dst, const uint8_t **src, int len);
yading@11: 
yading@11: typedef struct AudioConvert {
yading@11:     int channels;
yading@11:     int  in_simd_align_mask;
yading@11:     int out_simd_align_mask;
yading@11:     conv_func_type *conv_f;
yading@11:     simd_func_type *simd_f;
yading@11:     const int *ch_map;
yading@11:     uint8_t silence[8]; ///< silence input sample
yading@11: }AudioConvert;
yading@11: 
yading@11: /**
yading@11:  * Create an audio sample format converter context
yading@11:  * @param out_fmt Output sample format
yading@11:  * @param in_fmt Input sample format
yading@11:  * @param channels Number of channels
yading@11:  * @param flags See AV_CPU_FLAG_xx
yading@11:  * @param ch_map list of the channels id to pick from the source stream, NULL
yading@11:  *               if all channels must be selected
yading@11:  * @return NULL on error
yading@11:  */
yading@11: AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt,
yading@11:                                        enum AVSampleFormat in_fmt,
yading@11:                                        int channels, const int *ch_map,
yading@11:                                        int flags);
yading@11: 
yading@11: /**
yading@11:  * Free audio sample format converter context.
yading@11:  * and set the pointer to NULL
yading@11:  */
yading@11: void swri_audio_convert_free(AudioConvert **ctx);
yading@11: 
yading@11: /**
yading@11:  * Convert between audio sample formats
yading@11:  * @param[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel.
yading@11:  * @param[in] in array of input buffers for each channel
yading@11:  * @param len length of audio frame size (measured in samples)
yading@11:  */
yading@11: int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len);
yading@11: 
yading@11: #endif /* AUDIOCONVERT_H */