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brickworks/include/bw_iir2.h

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/*
* Brickworks
*
* Copyright (C) 2025 Orastron Srl unipersonale
*
* Brickworks is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* Brickworks 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Brickworks. If not, see <http://www.gnu.org/licenses/>.
*
* File author: Stefano D'Angelo
*/
/*!
* module_type {{{ utility }}}
* version {{{ 1.0.0 }}}
* requires {{{ bw_common bw_math }}}
* description {{{
* XXX
* }}}
* changelog {{{
* <ul>
* <li>Version <strong>1.0.0</strong>:
* <ul>
* <li>First release.</li>
* </ul>
* </li>
* </ul>
* }}}
*/
#ifndef BW_IIR2_H
#define BW_IIR2_H
#ifdef BW_INCLUDE_WITH_QUOTES
# include "bw_common.h"
#else
# include <bw_common.h>
#endif
#if !defined(BW_CXX_NO_EXTERN_C) && defined(__cplusplus)
extern "C" {
#endif
/*** Public API ***/
/*! api {{{
* #### bw_iir2_reset()
* ```>>> */
static inline void bw_iir2_reset(
float x_0,
float * BW_RESTRICT y_0,
float * BW_RESTRICT s1_0,
float * BW_RESTRICT s2_0,
float b0,
float b1,
float b2,
float a1,
float a2);
/*! <<<```
* XXX.
*
* #### bw_iir2_reset_multi()
* ```>>> */
static inline void bw_iir2_reset_multi(
const float * x_0,
float * y_0,
float * BW_RESTRICT s1_0,
float * s2_0,
float b0,
float b1,
float b2,
float a1,
float a2,
size_t n_channels);
/*! <<<```
* XXX.
*
* #### bw_iir2_process1()
* ```>>> */
static inline void bw_iir2_process1(
float x,
float * BW_RESTRICT y,
float * BW_RESTRICT s1,
float * BW_RESTRICT s2,
float b0,
float b1,
float b2,
float a1,
float a2);
/*! <<<```
* XXX.
*
* #### bw_iir2_process()
* ```>>> */
static inline void bw_iir2_process(
const float * x,
float * y,
float * BW_RESTRICT s1,
float * BW_RESTRICT s2,
float b0,
float b1,
float b2,
float a1,
float a2,
size_t n_samples);
/*! <<<```
* XXX
*
* #### bw_iir2_process_multi()
* ```>>> */
static inline void bw_iir2_process_multi(
const float * const * x,
float * const * y,
float * BW_RESTRICT s1,
float * BW_RESTRICT s2,
float b0,
float b1,
float b2,
float a1,
float a2,
size_t n_channels,
size_t n_samples);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_ap2()
* ```>>> */
static inline void bw_iir2_coeffs_ap2(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_bp2()
* ```>>> */
static inline void bw_iir2_coeffs_bp2(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_hp2()
* ```>>> */
static inline void bw_iir2_coeffs_hp2(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_hs2_lin()
* ```>>> */
static inline void bw_iir2_coeffs_hs2_lin(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float high_gain_lin,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_hs2_dB()
* ```>>> */
static inline void bw_iir2_coeffs_hs2_dB(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float high_gain_dB,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_lp2()
* ```>>> */
static inline void bw_iir2_coeffs_lp2(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_ls2_lin()
* ```>>> */
static inline void bw_iir2_coeffs_ls2_lin(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float dc_gain_lin,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_ls2_dB()
* ```>>> */
static inline void bw_iir2_coeffs_ls2_dB(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float dc_gain_dB,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_mm2()
* ```>>> */
static inline void bw_iir2_coeffs_mm2(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float coeff_x,
float coeff_lp,
float coeff_bp,
float coeff_hp,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_notch()
* ```>>> */
static inline void bw_iir2_coeffs_notch(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_peak_lin()
* ```>>> */
static inline void bw_iir2_coeffs_peak_lin(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float peak_gain_lin,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_peak_dB()
* ```>>> */
static inline void bw_iir2_coeffs_peak_dB(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float peak_gain_dB,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_peak_lin_bw()
* ```>>> */
static inline void bw_iir2_coeffs_peak_lin_bw(
float sample_rate,
float cutoff,
float bandwidth,
char prewarp_at_cutoff,
float prewarp_freq,
float peak_gain_lin,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
*
* #### bw_iir2_coeffs_peak_dB_bw()
* ```>>> */
static inline void bw_iir2_coeffs_peak_dB_bw(
float sample_rate,
float cutoff,
float bandwidth,
char prewarp_at_cutoff,
float prewarp_freq,
float peak_gain_dB,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2);
/*! <<<```
* XXX
* }}} */
#if !defined(BW_CXX_NO_EXTERN_C) && defined(__cplusplus)
}
#endif
/*** Implementation ***/
/* WARNING: This part of the file is not part of the public API. Its content may
* change at any time in future versions. Please, do not use it directly. */
#ifdef BW_INCLUDE_WITH_QUOTES
# include "bw_math.h"
#else
# include <bw_math.h>
#endif
#if !defined(BW_CXX_NO_EXTERN_C) && defined(__cplusplus)
extern "C" {
#endif
static inline void bw_iir2_reset(
float x_0,
float * BW_RESTRICT y_0,
float * BW_RESTRICT s1_0,
float * BW_RESTRICT s2_0,
float b0,
float b1,
float b2,
float a1,
float a2) {
// a1, a2...
const float d = bw_rcpf(1.f + a1 + a2);
const float k = d * x_0;
*y_0 = k * (b0 + b1 + b2);
*s1_0 = k * (b1 + b2 - b0 * (a1 + a2));
*s2_0 = k * (b2 + b2 * a1 - a2 * (b0 + b1));
}
static inline void bw_iir2_reset_multi(
const float * x_0,
float * y_0,
float * BW_RESTRICT s1_0,
float * s2_0,
float b0,
float b1,
float b2,
float a1,
float a2,
size_t n_channels) {
if (y_0 != BW_NULL) {
if (s1_0 != BW_NULL) {
if (s2_0 != BW_NULL)
for (size_t i = 0; i < n_channels; i++)
bw_iir2_reset(x_0[i], y_0 + i, s1_0 + i, s2_0 + i, b0, b1, b2, a1, a2);
else
for (size_t i = 0; i < n_channels; i++) {
float v_s2;
bw_iir2_reset(x_0[i], y_0 + i, s1_0 + i, &v_s2, b0, b1, b2, a1, a2);
}
} else {
if (s2_0 != BW_NULL)
for (size_t i = 0; i < n_channels; i++) {
float v_s1;
bw_iir2_reset(x_0[i], y_0 + i, &v_s1, s2_0 + i, b0, b1, b2, a1, a2);
}
else
for (size_t i = 0; i < n_channels; i++) {
float v_s1, v_s2;
bw_iir2_reset(x_0[i], y_0 + i, &v_s1, &v_s2, b0, b1, b2, a1, a2);
}
}
} else {
if (s1_0 != BW_NULL) {
if (s2_0 != BW_NULL)
for (size_t i = 0; i < n_channels; i++) {
float v_y;
bw_iir2_reset(x_0[i], &v_y, s1_0 + i, s2_0 + i, b0, b1, b2, a1, a2);
}
else
for (size_t i = 0; i < n_channels; i++) {
float v_y, v_s2;
bw_iir2_reset(x_0[i], &v_y, s1_0 + i, &v_s2, b0, b1, b2, a1, a2);
}
} else {
if (s2_0 != BW_NULL)
for (size_t i = 0; i < n_channels; i++) {
float v_y, v_s1;
bw_iir2_reset(x_0[i], &v_y, &v_s1, s2_0 + i, b0, b1, b2, a1, a2);
}
else
{} // no need to do anything
}
}
}
static inline void bw_iir2_process1(
float x,
float * BW_RESTRICT y,
float * BW_RESTRICT s1,
float * BW_RESTRICT s2,
float b0,
float b1,
float b2,
float a1,
float a2) {
*y = b0 * x + *s1;
*s1 = b1 * x - a1 * *y + *s2;
*s2 = b2 * x - a2 * *y;
}
static inline void bw_iir2_process(
const float * x,
float * y,
float * BW_RESTRICT s1,
float * BW_RESTRICT s2,
float b0,
float b1,
float b2,
float a1,
float a2,
size_t n_samples) {
for (size_t i = 0; i < n_samples; i++)
bw_iir2_process1(x[i], y + i, s1, s2, b0, b1, b2, a1, a2);
}
static inline void bw_iir2_process_multi(
const float * const * x,
float * const * y,
float * BW_RESTRICT s1,
float * BW_RESTRICT s2,
float b0,
float b1,
float b2,
float a1,
float a2,
size_t n_channels,
size_t n_samples) {
for (size_t i = 0; i < n_samples; i++)
for (size_t j = 0; j < n_channels; j++)
bw_iir2_process1(x[j][i], y[j] + i, s1 + j, s2 + j, b0, b1, b2, a1, a2);
}
#define BW_IIR2_COEFFS_COMMON \
prewarp_freq = prewarp_at_cutoff ? cutoff : prewarp_freq; \
const float t = bw_tanf(3.141592653589793f * prewarp_freq * bw_rcpf(sample_rate)); \
const float k1 = prewarp_freq * prewarp_freq; \
const float k2 = t * cutoff; \
const float k3 = k2 * k2; \
const float k4 = k2 * prewarp_freq; \
const float k5 = Q * (k1 + k3); \
const float d = bw_rcpf(k5 + k4); \
*a1 = d * (Q + Q) * (k3 - k1); \
*a2 = d * (k5 - k4);
static inline void bw_iir2_coeffs_ap2(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
BW_IIR2_COEFFS_COMMON
*b0 = *a2;
*b1 = *a1;
*b2 = 1.f;
}
static inline void bw_iir2_coeffs_bp2(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
BW_IIR2_COEFFS_COMMON
*b0 = Q * k4;
*b1 = 0.f;
*b2 = -*b0;
}
static inline void bw_iir2_coeffs_hp2(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
BW_IIR2_COEFFS_COMMON
*b0 = Q * k1;
*b1 = -(*b0 + *b0);
*b2 = *b0;
}
static inline void bw_iir2_coeffs_hs2_lin(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float high_gain_lin,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
const float sg = bw_sqrtf(high_gain_lin);
const float ssg = bw_sqrtf(sg);
cutoff = cutoff * ssg;
BW_IIR2_COEFFS_COMMON
const float k6 = k1 * high_gain_lin;
const float k7 = k3 - k3 * sg;
const float k8 = Q * (k7 + k6);
const float k9 = k4 * sg;
*b0 = d * (k8 + k9);
*b1 = d * (Q + Q) * (k7 - k6);
*b2 = d * (k8 - k9);
}
static inline void bw_iir2_coeffs_hs2_dB(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float high_gain_dB,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
bw_iir2_coeffs_hs2_lin(sample_rate, cutoff, Q, prewarp_at_cutoff, prewarp_freq, bw_dB2linf(high_gain_dB), b0, b1, b2, a1, a2);
}
static inline void bw_iir2_coeffs_lp2(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
BW_IIR2_COEFFS_COMMON
*b0 = Q * k3;
*b1 = *b0 + *b0;
*b2 = *b0;
}
static inline void bw_iir2_coeffs_ls2_lin(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float dc_gain_lin,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
const float sg = bw_sqrtf(dc_gain_lin);
const float issg = bw_rcpf(bw_sqrtf(sg));
cutoff = cutoff * issg;
BW_IIR2_COEFFS_COMMON
const float k6 = k3 * (dc_gain_lin - sg);
const float k7 = Q * (k6 + k1);
const float k8 = k4 * sg;
*b0 = d * (k7 + k8);
*b1 = d * (Q + Q) * (k6 - k1);
*b2 = d * (k7 - k8);
}
static inline void bw_iir2_coeffs_ls2_dB(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float dc_gain_dB,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
bw_iir2_coeffs_ls2_lin(sample_rate, cutoff, Q, prewarp_at_cutoff, prewarp_freq, bw_dB2linf(dc_gain_dB), b0, b1, b2, a1, a2);
}
static inline void bw_iir2_coeffs_mm2(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float coeff_x,
float coeff_lp,
float coeff_bp,
float coeff_hp,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
BW_IIR2_COEFFS_COMMON
const float k6 = k3 * (coeff_lp + coeff_x);
const float k7 = k1 * (coeff_hp + coeff_x);
const float k8 = k4 * (Q * coeff_bp + coeff_x);
const float k9 = Q * (k6 + k7);
*b0 = d * (k9 + k8);
*b1 = d * (Q + Q) * (k6 - k7);
*b2 = d * (k9 - k8);
}
static inline void bw_iir2_coeffs_notch(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
BW_IIR2_COEFFS_COMMON
*b0 = d * k5;
*b1 = *a1;
*b2 = *b0;
}
static inline void bw_iir2_coeffs_peak_lin(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float peak_gain_lin,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
BW_IIR2_COEFFS_COMMON
const float k6 = Q * (k1 + k3);
const float k7 = k4 * peak_gain_lin;
*b0 = d * (k6 + k7);
*b1 = *a1;
*b2 = d * (k6 - k7);
}
static inline void bw_iir2_coeffs_peak_dB(
float sample_rate,
float cutoff,
float Q,
char prewarp_at_cutoff,
float prewarp_freq,
float peak_gain_dB,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
bw_iir2_coeffs_peak_lin(sample_rate, cutoff, Q, prewarp_at_cutoff, prewarp_freq, bw_dB2linf(peak_gain_dB), b0, b1, b2, a1, a2);
}
static inline void bw_iir2_coeffs_peak_lin_bw(
float sample_rate,
float cutoff,
float bandwidth,
char prewarp_at_cutoff,
float prewarp_freq,
float peak_gain_lin,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
const float k6 = bw_pow2f(bandwidth);
const float Q = bw_sqrtf(k6 * peak_gain_lin) * bw_rcpf(k6 - 1.f);
bw_iir2_coeffs_peak_lin(sample_rate, cutoff, Q, prewarp_at_cutoff, prewarp_freq, peak_gain_lin, b0, b1, b2, a1, a2);
}
static inline void bw_iir2_coeffs_peak_dB_bw(
float sample_rate,
float cutoff,
float bandwidth,
char prewarp_at_cutoff,
float prewarp_freq,
float peak_gain_dB,
float * BW_RESTRICT b0,
float * BW_RESTRICT b1,
float * BW_RESTRICT b2,
float * BW_RESTRICT a1,
float * BW_RESTRICT a2) {
bw_iir2_coeffs_peak_lin_bw(sample_rate, cutoff, bandwidth, prewarp_at_cutoff, prewarp_freq, bw_dB2linf(peak_gain_dB), b0, b1, b2, a1, a2);
}
#undef BW_IIR2_COEFFS_COMMON
#if !defined(BW_CXX_NO_EXTERN_C) && defined(__cplusplus)
}
#endif
#if !defined(BW_NO_CXX) && defined(__cplusplus)
# ifndef BW_CXX_NO_ARRAY
# include <array>
# endif
namespace Brickworks {
/*** Public C++ API ***/
/*! api_cpp {{{
* ##### Brickworks::iir2Reset
* ```>>> */
template<size_t N_CHANNELS>
void iir2Reset(
const float * x0,
float * y0,
float * BW_RESTRICT s10,
float * BW_RESTRICT s20,
float b0,
float b1,
float b2,
float a1,
float a2);
# ifndef BW_CXX_NO_ARRAY
template<size_t N_CHANNELS>
void iir2Reset(
std::array<float, N_CHANNELS> x0,
std::array<float, N_CHANNELS> * BW_RESTRICT y0,
std::array<float, N_CHANNELS> * BW_RESTRICT s10,
std::array<float, N_CHANNELS> * BW_RESTRICT s20,
float b0,
float b1,
float b2,
float a1,
float a2);
# endif
template<size_t N_CHANNELS>
void iir2Process(
const float * const * x,
float * const * y,
float * BW_RESTRICT s1,
float * BW_RESTRICT s2,
float b0,
float b1,
float b2,
float a1,
float a2,
size_t nSamples);
# ifndef BW_CXX_NO_ARRAY
template<size_t N_CHANNELS>
void iir2Process(
std::array<const float *, N_CHANNELS> x,
std::array<float *, N_CHANNELS> y,
std::array<float, N_CHANNELS> * BW_RESTRICT s1,
std::array<float, N_CHANNELS> * BW_RESTRICT s2,
float b0,
float b1,
float b2,
float a1,
float a2,
size_t nSamples);
# endif
/*! <<<```
* }}} */
/*** Implementation ***/
/* WARNING: This part of the file is not part of the public API. Its content may
* change at any time in future versions. Please, do not use it directly. */
template<size_t N_CHANNELS>
inline void iir2Reset(
const float * x0,
float * y0,
float * BW_RESTRICT s10,
float * BW_RESTRICT s20,
float b0,
float b1,
float b2,
float a1,
float a2) {
bw_iir2_reset_multi(x0, y0, s10, s20, b0, b1, b2, a1, a2, N_CHANNELS);
}
# ifndef BW_CXX_NO_ARRAY
template<size_t N_CHANNELS>
inline void iir2Reset(
std::array<float, N_CHANNELS> x0,
std::array<float, N_CHANNELS> * BW_RESTRICT y0,
std::array<float, N_CHANNELS> * BW_RESTRICT s10,
std::array<float, N_CHANNELS> * BW_RESTRICT s20,
float b0,
float b1,
float b2,
float a1,
float a2) {
iir2Reset<N_CHANNELS>(x0.data(), y0 != BW_NULL ? y0.data() : BW_NULL, s10 != BW_NULL ? s10.data() : BW_NULL, s20 != BW_NULL ? s20.data() : BW_NULL, b0, b1, b2, a1, a2);
}
# endif
template<size_t N_CHANNELS>
inline void iir2Process(
const float * const * x,
float * const * y,
float * BW_RESTRICT s1,
float * BW_RESTRICT s2,
float b0,
float b1,
float b2,
float a1,
float a2,
size_t nSamples) {
bw_iir2_process_multi(x, y, s1, s2, b0, b1, b2, a1, a2, N_CHANNELS, nSamples);
}
# ifndef BW_CXX_NO_ARRAY
template<size_t N_CHANNELS>
inline void iir2Process(
std::array<const float *, N_CHANNELS> x,
std::array<float *, N_CHANNELS> y,
std::array<float, N_CHANNELS> * BW_RESTRICT s1,
std::array<float, N_CHANNELS> * BW_RESTRICT s2,
float b0,
float b1,
float b2,
float a1,
float a2,
size_t nSamples) {
iir2Process<N_CHANNELS>(x.data(), y.data(), s1.data(), s2.data(), b0, b1, b2, a1, a2, nSamples);
}
# endif
}
#endif
#endif
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