libswresample/swresample_internal.h

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/*
 * Copyright (C) 2011 Michael Niedermayer (michaelni@gmx.at)
 *
 * This file is part of libswresample
 *
 * libswresample 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.
 *
 * libswresample 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 libswresample; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef SWR_INTERNAL_H
#define SWR_INTERNAL_H

#include "swresample.h"

typedef struct AudioData{
    uint8_t *ch[SWR_CH_MAX];    
    uint8_t *data;              
    int ch_count;               
    int bps;                    
    int count;                  
    int planar;                 
} AudioData;

typedef struct SwrContext {
    const AVClass *av_class;                        
    int log_level_offset;                           
    void *log_ctx;                                  
    enum AVSampleFormat  in_sample_fmt;             
    enum AVSampleFormat int_sample_fmt;             
    enum AVSampleFormat out_sample_fmt;             
    int64_t  in_ch_layout;                          
    int64_t out_ch_layout;                          
    int      in_sample_rate;                        
    int     out_sample_rate;                        
    int flags;                                      
    float slev;                                     
    float clev;                                     
    float rematrix_volume;                          
    const int *channel_map;                         
    int used_ch_count;                              

    int int_bps;                                    
    int resample_first;                             
    int rematrix;                                   

    AudioData in;                                   
    AudioData postin;                               
    AudioData midbuf;                               
    AudioData preout;                               
    AudioData out;                                  
    AudioData in_buffer;                            
    int in_buffer_index;                            
    int in_buffer_count;                            
    int resample_in_constraint;                     

    struct AudioConvert *in_convert;                
    struct AudioConvert *out_convert;               
    struct AudioConvert *full_convert;              
    struct ResampleContext *resample;               

    float matrix[SWR_CH_MAX][SWR_CH_MAX];           
    int32_t matrix32[SWR_CH_MAX][SWR_CH_MAX];       
    uint8_t matrix_ch[SWR_CH_MAX][SWR_CH_MAX+1];    

    /* TODO: callbacks for ASM optimizations */
}SwrContext;

struct ResampleContext *swri_resample_init(struct ResampleContext *, int out_rate, int in_rate, int filter_size, int phase_shift, int linear, double cutoff);
void swri_resample_free(struct ResampleContext **c);
int swri_multiple_resample(struct ResampleContext *c, AudioData *dst, int dst_size, AudioData *src, int src_size, int *consumed);
void swri_resample_compensate(struct ResampleContext *c, int sample_delta, int compensation_distance);
int swri_resample(struct ResampleContext *c, int16_t *dst, const int16_t *src, int *consumed, int src_size, int dst_size, int update_ctx);

int swri_rematrix_init(SwrContext *s);
int swri_rematrix(SwrContext *s, AudioData *out, AudioData *in, int len, int mustcopy);

#endif

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