mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-23 19:30:05 +00:00
c8af852b97
This is a new library for audio sample format, channel layout, and sample rate conversion.
71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at>
|
|
*
|
|
* 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_RESAMPLE_H
|
|
#define AVRESAMPLE_RESAMPLE_H
|
|
|
|
#include "avresample.h"
|
|
#include "audio_data.h"
|
|
|
|
typedef struct ResampleContext ResampleContext;
|
|
|
|
/**
|
|
* Allocate and initialize a ResampleContext.
|
|
*
|
|
* The parameters in the AVAudioResampleContext are used to initialize the
|
|
* ResampleContext.
|
|
*
|
|
* @param avr AVAudioResampleContext
|
|
* @return newly-allocated ResampleContext
|
|
*/
|
|
ResampleContext *ff_audio_resample_init(AVAudioResampleContext *avr);
|
|
|
|
/**
|
|
* Free a ResampleContext.
|
|
*
|
|
* @param c ResampleContext
|
|
*/
|
|
void ff_audio_resample_free(ResampleContext **c);
|
|
|
|
/**
|
|
* Resample audio data.
|
|
*
|
|
* Changes the sample rate.
|
|
*
|
|
* @par
|
|
* All samples in the source data may not be consumed depending on the
|
|
* resampling parameters and the size of the output buffer. The unconsumed
|
|
* samples are automatically added to the start of the source in the next call.
|
|
* If the destination data can be reallocated, that may be done in this function
|
|
* in order to fit all available output. If it cannot be reallocated, fewer
|
|
* input samples will be consumed in order to have the output fit in the
|
|
* destination data buffers.
|
|
*
|
|
* @param c ResampleContext
|
|
* @param dst destination audio data
|
|
* @param src source audio data
|
|
* @param consumed number of samples consumed from the source
|
|
* @return number of samples written to the destination
|
|
*/
|
|
int ff_audio_resample(ResampleContext *c, AudioData *dst, AudioData *src,
|
|
int *consumed);
|
|
|
|
#endif /* AVRESAMPLE_RESAMPLE_H */
|