mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
88 lines
3.4 KiB
C
88 lines
3.4 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
|
||
|
|
*
|
||
|
|
* This file is part of Libav.
|
||
|
|
*
|
||
|
|
* Libav 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.
|
||
|
|
*
|
||
|
|
* Libav 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 Libav; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef AVRESAMPLE_AUDIO_CONVERT_H
|
||
|
|
#define AVRESAMPLE_AUDIO_CONVERT_H
|
||
|
|
|
||
|
|
#include "libavutil/samplefmt.h"
|
||
|
|
#include "avresample.h"
|
||
|
|
#include "audio_data.h"
|
||
|
|
|
||
|
|
typedef struct AudioConvert AudioConvert;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set conversion function if the parameters match.
|
||
|
|
*
|
||
|
|
* This compares the parameters of the conversion function to the parameters
|
||
|
|
* in the AudioConvert context. If the parameters do not match, no changes are
|
||
|
|
* made to the active functions. If the parameters do match and the alignment
|
||
|
|
* is not constrained, the function is set as the generic conversion function.
|
||
|
|
* If the parameters match and the alignment is constrained, the function is
|
||
|
|
* set as the optimized conversion function.
|
||
|
|
*
|
||
|
|
* @param ac AudioConvert context
|
||
|
|
* @param out_fmt output sample format
|
||
|
|
* @param in_fmt input sample format
|
||
|
|
* @param channels number of channels, or 0 for any number of channels
|
||
|
|
* @param ptr_align buffer pointer alignment, in bytes
|
||
|
|
* @param sample_align buffer size alignment, in samples
|
||
|
|
* @param descr function type description (e.g. "C" or "SSE")
|
||
|
|
* @param conv conversion function pointer
|
||
|
|
*/
|
||
|
|
void ff_audio_convert_set_func(AudioConvert *ac, enum AVSampleFormat out_fmt,
|
||
|
|
enum AVSampleFormat in_fmt, int channels,
|
||
|
|
int ptr_align, int samples_align,
|
||
|
|
const char *descr, void *conv);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Allocate and initialize AudioConvert context for sample format conversion.
|
||
|
|
*
|
||
|
|
* @param avr AVAudioResampleContext
|
||
|
|
* @param out_fmt output sample format
|
||
|
|
* @param in_fmt input sample format
|
||
|
|
* @param channels number of channels
|
||
|
|
* @return newly-allocated AudioConvert context
|
||
|
|
*/
|
||
|
|
AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr,
|
||
|
|
enum AVSampleFormat out_fmt,
|
||
|
|
enum AVSampleFormat in_fmt,
|
||
|
|
int channels);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Convert audio data from one sample format to another.
|
||
|
|
*
|
||
|
|
* For each call, the alignment of the input and output AudioData buffers are
|
||
|
|
* examined to determine whether to use the generic or optimized conversion
|
||
|
|
* function (when available).
|
||
|
|
*
|
||
|
|
* @param ac AudioConvert context
|
||
|
|
* @param out output audio data
|
||
|
|
* @param in input audio data
|
||
|
|
* @param len number of samples to convert
|
||
|
|
* @return 0 on success, negative AVERROR code on failure
|
||
|
|
*/
|
||
|
|
int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in, int len);
|
||
|
|
|
||
|
|
/* arch-specific initialization functions */
|
||
|
|
|
||
|
|
void ff_audio_convert_init_x86(AudioConvert *ac);
|
||
|
|
|
||
|
|
#endif /* AVRESAMPLE_AUDIO_CONVERT_H */
|