avresample.h

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/*
 * 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_AVRESAMPLE_H
#define AVRESAMPLE_AVRESAMPLE_H

#include "libavutil/avutil.h"
#include "libavutil/channel_layout.h"
#include "libavutil/dict.h"
#include "libavutil/log.h"

#include "libavresample/version.h"

#define AVRESAMPLE_MAX_CHANNELS 32

typedef struct AVAudioResampleContext AVAudioResampleContext;

enum AVMixCoeffType {
    AV_MIX_COEFF_TYPE_Q8,   
    AV_MIX_COEFF_TYPE_Q15,  
    AV_MIX_COEFF_TYPE_FLT,  
    AV_MIX_COEFF_TYPE_NB,   
};

enum AVResampleFilterType {
    AV_RESAMPLE_FILTER_TYPE_CUBIC,              
    AV_RESAMPLE_FILTER_TYPE_BLACKMAN_NUTTALL,   
    AV_RESAMPLE_FILTER_TYPE_KAISER,             
};

enum AVResampleDitherMethod {
    AV_RESAMPLE_DITHER_NONE,            
    AV_RESAMPLE_DITHER_RECTANGULAR,     
    AV_RESAMPLE_DITHER_TRIANGULAR,      
    AV_RESAMPLE_DITHER_TRIANGULAR_HP,   
    AV_RESAMPLE_DITHER_TRIANGULAR_NS,   
    AV_RESAMPLE_DITHER_NB,              
};

unsigned avresample_version(void);

const char *avresample_configuration(void);

const char *avresample_license(void);

const AVClass *avresample_get_class(void);

AVAudioResampleContext *avresample_alloc_context(void);

int avresample_open(AVAudioResampleContext *avr);

void avresample_close(AVAudioResampleContext *avr);

void avresample_free(AVAudioResampleContext **avr);

int avresample_build_matrix(uint64_t in_layout, uint64_t out_layout,
                            double center_mix_level, double surround_mix_level,
                            double lfe_mix_level, int normalize, double *matrix,
                            int stride, enum AVMatrixEncoding matrix_encoding);

int avresample_get_matrix(AVAudioResampleContext *avr, double *matrix,
                          int stride);

int avresample_set_matrix(AVAudioResampleContext *avr, const double *matrix,
                          int stride);

int avresample_set_channel_mapping(AVAudioResampleContext *avr,
                                   const int *channel_map);

int avresample_set_compensation(AVAudioResampleContext *avr, int sample_delta,
                                int compensation_distance);

int avresample_convert(AVAudioResampleContext *avr, uint8_t **output,
                       int out_plane_size, int out_samples, uint8_t **input,
                       int in_plane_size, int in_samples);

int avresample_get_delay(AVAudioResampleContext *avr);

int avresample_available(AVAudioResampleContext *avr);

int avresample_read(AVAudioResampleContext *avr, uint8_t **output, int nb_samples);

#endif /* AVRESAMPLE_AVRESAMPLE_H */