dsps_biquad_gen.h

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// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#ifndef _dsps_biquad_gen_H_
#define _dsps_biquad_gen_H_
 
#include "dsp_err.h"
 
#ifdef __cplusplus
extern "C"
{
#endif
 
// Common rules for all generated coefficients.
// The coefficients placed to the array as follows:
// coeffs[0] = b0;
// coeffs[1] = b1;
// coeffs[2] = b2;
// coeffs[3] = a1;
// coeffs[4] = a2;
// a0 - are not placed and expected always as == 1

esp_err_t dsps_biquad_gen_lpf_f32(float *coeffs, float f, float qFactor);

esp_err_t dsps_biquad_gen_hpf_f32(float *coeffs, float f, float qFactor);

esp_err_t dsps_biquad_gen_bpf_f32(float *coeffs, float f, float qFactor);

esp_err_t dsps_biquad_gen_bpf0db_f32(float *coeffs, float f, float qFactor);

esp_err_t dsps_biquad_gen_notch_f32(float *coeffs, float f, float gain, float qFactor);

esp_err_t dsps_biquad_gen_allpass360_f32(float *coeffs, float f, float qFactor);

esp_err_t dsps_biquad_gen_allpass180_f32(float *coeffs, float f, float qFactor);

esp_err_t dsps_biquad_gen_peakingEQ_f32(float *coeffs, float f, float qFactor);

esp_err_t dsps_biquad_gen_lowShelf_f32(float *coeffs, float f, float gain, float qFactor);

esp_err_t dsps_biquad_gen_highShelf_f32(float *coeffs, float f, float gain, float qFactor);
 
#ifdef __cplusplus
}
#endif
 
#endif // _dsps_biquad_gen_H_