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* Copyright (c) 2004 Michael Niedermayer <>
* 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
* 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
#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);
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