dsps_resampler.h

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/*
 * SPDX-FileCopyrightText: 2018-2025 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef _dsps_resampl_H_
#define _dsps_resampl_H_
 
#include "dsp_err.h"
#include "dsps_fir.h"
 
#ifdef __cplusplus
extern "C"
{
#endif

typedef struct dsps_resample_mr_s {
    void *filter;               
    float samplerate_factor;    
    int16_t decim_c;            
    int16_t decim_f;            
    int16_t active_decim;       
    float   decim_avg_in;       
    float   decim_avg_out;      
    int32_t (*dsps_firmr)(void *fir, void *input, void *output, int32_t length); 
    int32_t fixed_point;        
} dsps_resample_mr_t;

typedef struct dsps_resample_ph_s {
    float phase;
    float step;
    float delay[4];
    int   delay_pos;
} dsps_resample_ph_t;

esp_err_t dsps_resampler_mr_init(dsps_resample_mr_t *resampler, void *coeffs, int16_t length, int16_t interp, float samplerate_factor, int32_t fixed_point, int16_t shift);

int32_t dsps_resampler_mr_exec(dsps_resample_mr_t *resampler, void *input, void *output, int32_t length, int32_t length_correction);

void dsps_resampler_mr_free(dsps_resample_mr_t *resampler);
 
 

esp_err_t dsps_resampler_ph_init(dsps_resample_ph_t *resampler, float samplerate_factor);

 
int32_t dsps_resampler_ph_exec(dsps_resample_ph_t *resampler, float *input, float *output, int32_t length);
 
#ifdef __cplusplus
}
#endif
#endif //_dsps_resampl_H_