mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
78 lines
2.6 KiB
78 lines
2.6 KiB
/* |
|
* 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 */
|
|
|