You've already forked FFmpeg
mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2025-10-30 23:18:11 +02:00
79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
/*
|
|
* 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 SWR_AUDIOCONVERT_H
|
|
#define SWR_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 /* AUDIOCONVERT_H */
|