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updated dates, fixed bw_{h,l}s2.h, renamed bw_notch, start of bw_peak

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Stefano D'Angelo 2023-01-12 15:44:24 +01:00
parent 1eeba2252a
commit 5988b4bc49
6 changed files with 397 additions and 77 deletions
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2
README.md
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@ -11,7 +11,7 @@ You can find information and documentation [on the official web page](https://ww
## Legal
Copyright (C) 2021, 2022 Orastron Srl unipersonale.
Copyright (C) 2021-2023 Orastron Srl unipersonale.
Authors: Stefano D'Angelo, Paolo Marrone.

1
TODO
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@ -20,6 +20,7 @@ code:
* avoid "force" in coeffs update by using inline functions?
* should rather use backward Euler in bw_onepole?
* Q to slope and viceversa functions in 2nd order shelf filters? keep updated values (seamless switch, syncrhonicity)?
* treat unused variable/function warnings
build system:
* make makefiles handle paths with spaces etc

46
include/bw_hs2.h
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@ -1,7 +1,7 @@
/*
* Brickworks
*
* Copyright (C) 2022 Orastron Srl unipersonale
* Copyright (C) 2022, 2023 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
@ -135,19 +135,21 @@ static inline void bw_hs2_set_Q(bw_mm2_coeffs *BW_RESTRICT coeffs, float value);
*
* Default value: `0.5f`.
*
* #### bw_hs2_set_dc_gain_lin()
* #### bw_hs2_set_high_gain_lin()
* ```>>> */
static inline void bw_hs2_set_dc_gain_lin(bw_hs2_coeffs *BW_RESTRICT coeffs, float value);
static inline void bw_hs2_set_high_gain_lin(bw_hs2_coeffs *BW_RESTRICT coeffs, float value);
/*! <<<```
* Sets the dc gain parameter to the given `value` (linear gain) in `coeffs`.
* Sets the high-frequency gain parameter to the given `value` (linear gain)
* in `coeffs`.
*
* Default value: `0.f`.
*
* #### bw_hs2_set_dc_gain_dB()
* #### bw_hs2_set_high_gain_dB()
* ```>>> */
static inline void bw_hs2_set_dc_gain_dB(bw_hs2_coeffs *BW_RESTRICT coeffs, float value);
static inline void bw_hs2_set_high_gain_dB(bw_hs2_coeffs *BW_RESTRICT coeffs, float value);
/*! <<<```
* Sets the dc gain parameter to the given `value` (dB) in `coeffs`.
* Sets the high-frequency gain parameter to the given `value` (dB) in
* `coeffs`.
*
* Default value: `-INFINITY`.
*
@ -186,7 +188,7 @@ struct _bw_hs2_coeffs {
float isg;
// Parameters
float gain;
float high_gain;
float Q;
float slope;
char use_slope;
@ -197,13 +199,13 @@ struct _bw_hs2_state {
bw_mm2_state mm2_state;
};
#define _BW_HS2_PARAM_GAIN 1
#define _BW_HS2_PARAM_HIGH_GAIN 1
#define _BW_HS2_PARAM_Q (1<<1)
#define _BW_HS2_PARAM_SLOPE (1<<1)
#define _BW_HS2_PARAM_SLOPE (1<<2)
static inline void bw_hs2_init(bw_hs2_coeffs *BW_RESTRICT coeffs) {
bw_mm2_init(&coeffs->mm2_coeffs);
coeffs->gain = 1.f;
coeffs->high_gain = 1.f;
coeffs->Q = 0.5f;
coeffs->slope = 0.5f;
coeffs->use_slope = 1;
@ -215,12 +217,12 @@ static inline void bw_hs2_set_sample_rate(bw_hs2_coeffs *BW_RESTRICT coeffs, flo
static inline void _bw_ls2_update_mm2_params(bw_ls1_coeffs *BW_RESTRICT coeffs) {
if (coeffs->param_changed) {
if (coeffs->param_changed & _BW_HS2_PARAM_GAIN) {
coeffs->sg = bw_math_sqrtf_2(coeffs->gain);
if (coeffs->param_changed & _BW_HS2_PARAM_HIGH_GAIN) {
coeffs->sg = bw_math_sqrtf_2(coeffs->high_gain);
coeffs->isg = bw_rcpf_2(coeffs->sg);
bw_mm2_set_coeff_x(&coeffs->mm2_coeffs, coeffs->sg);
bw_mm2_set_coeff_lp(&coeffs->mm2_coeffs, 1.f - coeffs->sg);
bw_mm2_set_coeff_hp(&coeffs->mm2_coeffs, coeffs->gain - coeffs->sg);
bw_mm2_set_coeff_hp(&coeffs->mm2_coeffs, coeffs->high_gain - coeffs->sg);
}
if (coeffs->use_slope) {
if (coeffs->param_changed & _BW_HS2_PARAM_SLOPE) {
@ -278,15 +280,15 @@ static inline void bw_hs2_set_Q(bw_mm2_coeffs *BW_RESTRICT coeffs, float value)
}
}
static inline void bw_hs2_set_dc_gain_lin(bw_hs2_coeffs *BW_RESTRICT coeffs, float value) {
if (coeffs->gain != value) {
coeffs->gain = value;
coeffs->param_changed |= _BW_HS2_PARAM_GAIN;
static inline void bw_hs2_set_high_gain_lin(bw_hs2_coeffs *BW_RESTRICT coeffs, float value) {
if (coeffs->high_gain != value) {
coeffs->high_gain = value;
coeffs->param_changed |= _BW_HS2_PARAM_HIGH_GAIN;
}
}
static inline void bw_hs2_set_dc_gain_dB(bw_hs2_coeffs *BW_RESTRICT coeffs, float value) {
bw_hs2_set_dc_gain_lin(coeffs, bw_dB2linf_3(value));
static inline void bw_hs2_set_high_gain_dB(bw_hs2_coeffs *BW_RESTRICT coeffs, float value) {
bw_hs2_set_high_gain_lin(coeffs, bw_dB2linf_3(value));
}
static inline void bw_hs2_set_slope(bw_hs2_coeffs *BW_RESTRICT coeffs, float value) {
@ -303,9 +305,9 @@ static inline void bw_hs2_set_use_slope(bw_mm2_coeffs *BW_RESTRICT coeffs, char
}
}
#undef _BW_HS2_PARAM_GAIN
#undef _BW_HS2_PARAM_HIGH_GAIN
#undef _BW_HS2_PARAM_Q
#undef _BW_HS2_PARAM_S
#undef _BW_HS2_PARAM_SLOPE
#ifdef __cplusplus
}

24
include/bw_ls2.h
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@ -1,7 +1,7 @@
/*
* Brickworks
*
* Copyright (C) 2022 Orastron Srl unipersonale
* Copyright (C) 2022, 2023 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
@ -187,7 +187,7 @@ struct _bw_ls2_coeffs {
float isg;
// Parameters
float gain;
float dc_gain;
float Q;
float slope;
char use_slope;
@ -198,13 +198,13 @@ struct _bw_ls2_state {
bw_mm2_state mm2_state;
};
#define _BW_LS2_PARAM_GAIN 1
#define _BW_LS2_PARAM_DC_GAIN 1
#define _BW_LS2_PARAM_Q (1<<1)
#define _BW_LS2_PARAM_SLOPE (1<<1)
#define _BW_LS2_PARAM_SLOPE (1<<2)
static inline void bw_ls2_init(bw_ls2_coeffs *BW_RESTRICT coeffs) {
bw_mm2_init(&coeffs->mm2_coeffs);
coeffs->gain = 1.f;
coeffs->dc_gain = 1.f;
coeffs->Q = 0.5f;
coeffs->slope = 0.5f;
coeffs->use_slope = 1;
@ -216,8 +216,8 @@ static inline void bw_ls2_set_sample_rate(bw_ls2_coeffs *BW_RESTRICT coeffs, flo
static inline void _bw_ls2_update_mm2_params(bw_ls1_coeffs *BW_RESTRICT coeffs) {
if (coeffs->param_changed) {
if (coeffs->param_changed & _BW_LS2_PARAM_GAIN) {
coeffs->sg = bw_math_sqrtf_2(coeffs->gain);
if (coeffs->param_changed & _BW_LS2_PARAM_DC_GAIN) {
coeffs->sg = bw_math_sqrtf_2(coeffs->dc_gain);
coeffs->isg = bw_rcpf_2(coeffs->sg);
bw_mm2_set_coeff_x(&coeffs->mm2_coeffs, coeffs->sg);
bw_mm2_set_coeff_lp(&coeffs->mm2_coeffs, 1.f - coeffs->isg);
@ -280,9 +280,9 @@ static inline void bw_ls2_set_Q(bw_mm2_coeffs *BW_RESTRICT coeffs, float value)
}
static inline void bw_ls2_set_dc_gain_lin(bw_ls2_coeffs *BW_RESTRICT coeffs, float value) {
if (coeffs->gain != value) {
coeffs->gain = value;
coeffs->param_changed |= _BW_LS2_PARAM_GAIN;
if (coeffs->dc_gain != value) {
coeffs->dc_gain = value;
coeffs->param_changed |= _BW_LS2_PARAM_DC_GAIN;
}
}
@ -304,9 +304,9 @@ static inline void bw_ls2_set_use_slope(bw_mm2_coeffs *BW_RESTRICT coeffs, char
}
}
#undef _BW_LS2_PARAM_GAIN
#undef _BW_LS2_PARAM_DC_GAIN
#undef _BW_LS2_PARAM_Q
#undef _BW_LS2_PARAM_S
#undef _BW_LS2_PARAM_SLOPE
#ifdef __cplusplus
}

84
include/bw_notch2.h → include/bw_notch.h
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@ -1,7 +1,7 @@
/*
* Brickworks
*
* Copyright (C) 2022 Orastron Srl unipersonale
* Copyright (C) 2022, 2023 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
@ -37,8 +37,8 @@
* }}}
*/
#ifndef _BW_NOTCH2_H
#define _BW_NOTCH2_H
#ifndef _BW_NOTCH_H
#define _BW_NOTCH_H
#ifdef __cplusplus
extern "C" {
@ -47,80 +47,80 @@ extern "C" {
#include <bw_common.h>
/*! api {{{
* #### bw_notch2_coeffs
* #### bw_notch_coeffs
* ```>>> */
typedef struct _bw_notch2_coeffs bw_notch2_coeffs;
typedef struct _bw_notch_coeffs bw_notch_coeffs;
/*! <<<```
* Coefficients and related.
*
* #### bw_notch2_state
* #### bw_notch_state
* ```>>> */
typedef struct _bw_notch2_state bw_notch2_state;
typedef struct _bw_notch_state bw_notch_state;
/*! <<<```
* Internal state and related.
*
* #### bw_notch2_init()
* #### bw_notch_init()
* ```>>> */
static inline void bw_notch2_init(bw_notch2_coeffs *BW_RESTRICT coeffs);
static inline void bw_notch_init(bw_notch_coeffs *BW_RESTRICT coeffs);
/*! <<<```
* Initializes input parameter values in `coeffs`.
*
* #### bw_notch2_set_sample_rate()
* #### bw_notch_set_sample_rate()
* ```>>> */
static inline void bw_notch2_set_sample_rate(bw_notch2_coeffs *BW_RESTRICT coeffs, float sample_rate);
static inline void bw_notch_set_sample_rate(bw_notch_coeffs *BW_RESTRICT coeffs, float sample_rate);
/*! <<<```
* Sets the `sample_rate` (Hz) value in `coeffs`.
*
* #### bw_notch2_reset_coeffs()
* #### bw_notch_reset_coeffs()
* ```>>> */
static inline void bw_notch2_reset_coeffs(bw_notch2_coeffs *BW_RESTRICT coeffs);
static inline void bw_notch_reset_coeffs(bw_notch_coeffs *BW_RESTRICT coeffs);
/*! <<<```
* Resets coefficients in `coeffs` to assume their target values.
*
* #### bw_notch2_reset_state()
* #### bw_notch_reset_state()
* ```>>> */
static inline void bw_notch2_reset_state(const bw_notch2_coeffs *BW_RESTRICT coeffs, bw_notch2_state *BW_RESTRICT state);
static inline void bw_notch_reset_state(const bw_notch_coeffs *BW_RESTRICT coeffs, bw_notch_state *BW_RESTRICT state);
/*! <<<```
* Resets the given `state` to its initial values using the given `coeffs`.
*
* #### bw_notch2_update_coeffs_ctrl()
* #### bw_notch_update_coeffs_ctrl()
* ```>>> */
static inline void bw_notch2_update_coeffs_ctrl(bw_notch2_coeffs *BW_RESTRICT coeffs);
static inline void bw_notch_update_coeffs_ctrl(bw_notch_coeffs *BW_RESTRICT coeffs);
/*! <<<```
* Triggers control-rate update of coefficients in `coeffs`.
*
* #### bw_notch2_update_coeffs_audio()
* #### bw_notch_update_coeffs_audio()
* ```>>> */
static inline void bw_notch2_update_coeffs_audio(bw_notch2_coeffs *BW_RESTRICT coeffs);
static inline void bw_notch_update_coeffs_audio(bw_notch_coeffs *BW_RESTRICT coeffs);
/*! <<<```
* Triggers audio-rate update of coefficients in `coeffs`.
*
* #### bw_notch2_process1()
* #### bw_notch_process1()
* ```>>> */
static inline float bw_notch2_process1(const bw_notch2_coeffs *BW_RESTRICT coeffs, bw_notch2_state *BW_RESTRICT state, float x);
static inline float bw_notch_process1(const bw_notch_coeffs *BW_RESTRICT coeffs, bw_notch_state *BW_RESTRICT state, float x);
/*! <<<```
* Processes one input sample `x` using `coeffs`, while using and updating
* `state`. Returns the corresponding output sample.
*
* #### bw_notch2_process()
* #### bw_notch_process()
* ```>>> */
static inline void bw_notch2_process(bw_notch2_coeffs *BW_RESTRICT coeffs, bw_notch2_state *BW_RESTRICT state, const float *x, float *y, int n_samples);
static inline void bw_notch_process(bw_notch_coeffs *BW_RESTRICT coeffs, bw_notch_state *BW_RESTRICT state, const float *x, float *y, int n_samples);
/*! <<<```
* Processes the first `n_samples` of the input buffer `x` and fills the
* first `n_samples` of the output buffer `y`, while using and updating both
* `coeffs` and `state` (control and audio rate).
*
* #### bw_notch2_set_cutoff()
* #### bw_notch_set_cutoff()
* ```>>> */
static inline void bw_notch2_set_cutoff(bw_notch2_coeffs *BW_RESTRICT coeffs, float value);
static inline void bw_notch_set_cutoff(bw_notch_coeffs *BW_RESTRICT coeffs, float value);
/*! <<<```
* Sets the cutoff frequency `value` (Hz) in `coeffs`.
*
* Default value: `1e3f`.
*
* #### bw_notch2_set_Q()
* #### bw_notch_set_Q()
* ```>>> */
static inline void bw_notch2_set_Q(bw_svf_coeffs *BW_RESTRICT coeffs, float value);
static inline void bw_notch_set_Q(bw_svf_coeffs *BW_RESTRICT coeffs, float value);
/*! <<<```
* Sets the quality factor to the given `value` in `coeffs`.
*
@ -136,58 +136,58 @@ static inline void bw_notch2_set_Q(bw_svf_coeffs *BW_RESTRICT coeffs, float valu
#include <bw_svf.h>
struct _bw_notch2_coeffs {
struct _bw_notch_coeffs {
// Sub-components
bw_svf_coeffs svf_coeffs;
};
struct _bw_notch2_state {
struct _bw_notch_state {
bw_svf_state svf_state;
};
static inline void bw_notch2_init(bw_notch2_coeffs *BW_RESTRICT coeffs) {
static inline void bw_notch_init(bw_notch_coeffs *BW_RESTRICT coeffs) {
bw_svf_init(&coeffs->svf_coeffs);
}
static inline void bw_notch2_set_sample_rate(bw_notch2_coeffs *BW_RESTRICT coeffs, float sample_rate) {
static inline void bw_notch_set_sample_rate(bw_notch_coeffs *BW_RESTRICT coeffs, float sample_rate) {
bw_svf_set_sample_rate(&coeffs->svf_coeffs, sample_rate);
}
static inline void bw_notch2_reset_coeffs(bw_notch2_coeffs *BW_RESTRICT coeffs) {
static inline void bw_notch_reset_coeffs(bw_notch_coeffs *BW_RESTRICT coeffs) {
bw_svf_reset_coeffs(&coeffs->svf_coeffs);
}
static inline void bw_notch2_reset_state(const bw_notch2_coeffs *BW_RESTRICT coeffs, bw_notch2_state *BW_RESTRICT state) {
static inline void bw_notch_reset_state(const bw_notch_coeffs *BW_RESTRICT coeffs, bw_notch_state *BW_RESTRICT state) {
bw_svf_reset_state(&coeffs->svf_coeffs, &state->svf_state);
}
static inline void bw_notch2_update_coeffs_ctrl(bw_notch2_coeffs *BW_RESTRICT coeffs) {
static inline void bw_notch_update_coeffs_ctrl(bw_notch_coeffs *BW_RESTRICT coeffs) {
bw_svf_update_coeffs_ctrl(&coeffs->svf_coeffs);
}
static inline void bw_notch2_update_coeffs_audio(bw_notch2_coeffs *BW_RESTRICT coeffs) {
static inline void bw_notch_update_coeffs_audio(bw_notch_coeffs *BW_RESTRICT coeffs) {
bw_svf_update_coeffs_audio(&coeffs->svf_coeffs);
}
static inline float bw_notch2_process1(const bw_notch2_coeffs *BW_RESTRICT coeffs, bw_notch2_state *BW_RESTRICT state, float x) {
static inline float bw_notch_process1(const bw_notch_coeffs *BW_RESTRICT coeffs, bw_notch_state *BW_RESTRICT state, float x) {
float lp, bp, hp;
bw_svf_process1(&coeffs->svf_coeffs, &state->svf_state, x, &lp, &bp, &hp);
return lp + hp;
}
static inline void bw_notch2_process(bw_notch2_coeffs *BW_RESTRICT coeffs, bw_notch2_state *BW_RESTRICT state, const float *x, float *y, int n_samples) {
bw_notch2_update_coeffs_ctrl(coeffs);
static inline void bw_notch_process(bw_notch_coeffs *BW_RESTRICT coeffs, bw_notch_state *BW_RESTRICT state, const float *x, float *y, int n_samples) {
bw_notch_update_coeffs_ctrl(coeffs);
for (int i = 0; i < n_samples; i++) {
bw_notch2_update_coeffs_audio(coeffs);
y[i] = bw_notch2_process1(coeffs, state, x[i]);
bw_notch_update_coeffs_audio(coeffs);
y[i] = bw_notch_process1(coeffs, state, x[i]);
}
}
static inline void bw_notch2_set_cutoff(bw_notch2_coeffs *BW_RESTRICT coeffs, float value) {
static inline void bw_notch_set_cutoff(bw_notch_coeffs *BW_RESTRICT coeffs, float value) {
bw_svf_set_cutoff(&coeffs->svf_coeffs, value);
}
static inline void bw_notch2_set_Q(bw_svf_coeffs *BW_RESTRICT coeffs, float value) {
static inline void bw_notch_set_Q(bw_svf_coeffs *BW_RESTRICT coeffs, float value) {
bw_svf_set_Q(&coeffs->svf_coeffs, value);
}

317
include/bw_peak.h Normal file
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@ -0,0 +1,317 @@
/*
* Brickworks
*
* Copyright (C) 2023 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 {{{ dsp }}}
* version {{{ 0.3.0 }}}
* requires {{{
* bw_config bw_common bw_gain bw_math bw_mm2 bw_one_pole bw_svf
* }}}
* description {{{
* Second-order peak filter with unitary gain at DC and asymptotically
* as frequency increases.
*
* The quality factor of the underlying bandpass filter can be either
* directly controlled via the Q parameter or indirectly through the
* bandwidth parameter, which designates the distance in octaves between
* midpoint gain frequencies, i.e., frequencies with gain = peak gain / 2 in
* dB terms. The use_bandiwdth parameter allows you to choose which
* parameterization to use.
* }}}
* changelog {{{
* <ul>
* <li>Version <strong>0.3.0</strong>:
* <ul>
* <li>First release.</li>
* </ul>
* </li>
* </ul>
* }}}
*/
#ifndef _BW_PEAK_H
#define _BW_PEAK_H
#ifdef __cplusplus
extern "C" {
#endif
#include <bw_common.h>
/*! api {{{
* #### bw_peak_coeffs
* ```>>> */
typedef struct _bw_peak_coeffs bw_peak_coeffs;
/*! <<<```
* Coefficients and related.
*
* #### bw_peak_state
* ```>>> */
typedef struct _bw_peak_state bw_peak_state;
/*! <<<```
* Internal state and related.
*
* #### bw_peak_init()
* ```>>> */
static inline void bw_peak_init(bw_peak_coeffs *BW_RESTRICT coeffs);
/*! <<<```
* Initializes input parameter values in `coeffs`.
*
* #### bw_peak_set_sample_rate()
* ```>>> */
static inline void bw_peak_set_sample_rate(bw_peak_coeffs *BW_RESTRICT coeffs, float sample_rate);
/*! <<<```
* Sets the `sample_rate` (Hz) value in `coeffs`.
*
* #### bw_peak_reset_coeffs()
* ```>>> */
static inline void bw_peak_reset_coeffs(bw_peak_coeffs *BW_RESTRICT coeffs);
/*! <<<```
* Resets coefficients in `coeffs` to assume their target values.
*
* #### bw_peak_reset_state()
* ```>>> */
static inline void bw_peak_reset_state(const bw_peak_coeffs *BW_RESTRICT coeffs, bw_peak_state *BW_RESTRICT state);
/*! <<<```
* Resets the given `state` to its initial values using the given `coeffs`.
*
* #### bw_peak_update_coeffs_ctrl()
* ```>>> */
static inline void bw_peak_update_coeffs_ctrl(bw_peak_coeffs *BW_RESTRICT coeffs);
/*! <<<```
* Triggers control-rate update of coefficients in `coeffs`.
*
* #### bw_peak_update_coeffs_audio()
* ```>>> */
static inline void bw_peak_update_coeffs_audio(bw_peak_coeffs *BW_RESTRICT coeffs);
/*! <<<```
* Triggers audio-rate update of coefficients in `coeffs`.
*
* #### bw_peak_process1()
* ```>>> */
static inline float bw_peak_process1(const bw_peak_coeffs *BW_RESTRICT coeffs, bw_peak_state *BW_RESTRICT state, float x);
/*! <<<```
* Processes one input sample `x` using `coeffs`, while using and updating
* `state`. Returns the corresponding output sample.
*
* #### bw_peak_process()
* ```>>> */
static inline void bw_peak_process(bw_peak_coeffs *BW_RESTRICT coeffs, bw_peak_state *BW_RESTRICT state, const float *x, float *y, int n_samples);
/*! <<<```
* Processes the first `n_samples` of the input buffer `x` and fills the
* first `n_samples` of the output buffer `y`, while using and updating both
* `coeffs` and `state` (control and audio rate).
*
* #### bw_peak_set_cutoff()
* ```>>> */
static inline void bw_peak_set_cutoff(bw_peak_coeffs *BW_RESTRICT coeffs, float value);
/*! <<<```
* Sets the cutoff frequency `value` (Hz) in `coeffs`.
*
* Default value: `1e3f`.
*
* #### bw_peak_set_Q()
* ```>>> */
static inline void bw_peak_set_Q(bw_mm2_coeffs *BW_RESTRICT coeffs, float value);
/*! <<<```
* Sets the quality factor to the given `value` in `coeffs`.
*
* `value` must be equal or bigger than `0.5f`.
*
* Default value: `0.5f`.
*
* #### bw_peak_set_gain_lin()
* ```>>> */
static inline void bw_peak_set_peak_gain_lin(bw_peak_coeffs *BW_RESTRICT coeffs, float value);
/*! <<<```
* Sets the peak gain parameter to the given `value` (linear gain) in
* `coeffs`.
*
* Default value: `0.f`.
*
* #### bw_peak_set_dc_gain_dB()
* ```>>> */
static inline void bw_peak_set_peak_gain_dB(bw_peak_coeffs *BW_RESTRICT coeffs, float value);
/*! <<<```
* Sets the peak gain parameter to the given `value` (dB) in `coeffs`.
*
* Default value: `-INFINITY`.
*
* #### bw_peak_set_bandiwdth()
* ```>>> */
static inline void bw_peak_set_bandwidth(bw_peak_coeffs *BW_RESTRICT coeffs, float value);
/*! <<<```
* Sets the bandwidth `value` (octaves) in `coeffs`.
*
* Default value: `0.5f`.
*
* #### bw_peak_set_use_slope()
* ```>>> */
static inline void bw_peak_set_use_bandwidth(bw_mm2_coeffs *BW_RESTRICT coeffs, char value);
/*! <<<```
* Sets whether the quality factor should be controlled via the bandwidth
* parameter (`value` non-`0`) or via the Q parameter (`0`).
*
* Default value: non-`0` (use bandwidth parameter).
* }}} */
/*** 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. */
#include <bw_mm2.h>
#include <bw_math.h>
struct _bw_peak_coeffs {
// Sub-components
bw_mm2_coeffs mm2_coeffs;
// Coefficients
float sg;
float isg;
// Parameters
float peak_gain;
float Q;
float bandwidth;
char use_bandwidth;
int param_changed;
};
struct _bw_peak_state {
bw_mm2_state mm2_state;
};
#define _BW_PEAK_PARAM_PEAK_GAIN 1
#define _BW_PEAK_PARAM_Q (1<<1)
#define _BW_PEAK_PARAM_BANDWIDTH (1<<2)
static inline void bw_peak_init(bw_peak_coeffs *BW_RESTRICT coeffs) {
bw_mm2_init(&coeffs->mm2_coeffs);
coeffs->peak_gain = 1.f;
coeffs->Q = 0.5f;
coeffs->bandwidth = ?; //Q=sqrt(gain)*k/(k^2-1), k=ratio f_half/f_peak
coeffs->use_bandwidth = 1;
}
static inline void bw_peak_set_sample_rate(bw_peak_coeffs *BW_RESTRICT coeffs, float sample_rate) {
bw_mm2_set_sample_rate(&coeffs->mm2_coeffs, sample_rate);
}
static inline void _bw_ls2_update_mm2_params(bw_ls1_coeffs *BW_RESTRICT coeffs) {
if (coeffs->param_changed) {
if (coeffs->param_changed & _BW_HS2_PARAM_GAIN) {
coeffs->sg = bw_math_sqrtf_2(coeffs->gain);
coeffs->isg = bw_rcpf_2(coeffs->sg);
bw_mm2_set_coeff_x(&coeffs->mm2_coeffs, coeffs->sg);
bw_mm2_set_coeff_lp(&coeffs->mm2_coeffs, 1.f - coeffs->sg);
bw_mm2_set_coeff_hp(&coeffs->mm2_coeffs, coeffs->gain - coeffs->sg);
}
if (coeffs->use_slope) {
if (coeffs->param_changed & _BW_HS2_PARAM_SLOPE) {
const float k = coeffs->sg + coeffs->isg;
bw_mm2_set_Q(&coeffs->mm2_coeffs, bw_sqrtf_2(coeffs->slope * bw_rcpf_2(coeffs->slope + coeffs->slope + k - k * coeffs->slope)));
}
}
else {
if (coeffs->param_changed & _BW_HS2_PARAM_Q)
bw_mm2_set_Q(&coeffs->mm2_coeffs, coeffs->Q);
}
coeffs->param_changed = 0;
}
}
static inline void bw_peak_reset_coeffs(bw_peak_coeffs *BW_RESTRICT coeffs) {
coeffs->param_changed = ~0;
_bw_peak_update_mm2_params(coeffs);
bw_mm2_reset_coeffs(&coeffs->mm2_coeffs);
}
static inline void bw_peak_reset_state(const bw_peak_coeffs *BW_RESTRICT coeffs, bw_peak_state *BW_RESTRICT state) {
bw_mm2_reset_state(&coeffs->mm2_coeffs, &state->mm2_state);
}
static inline void bw_peak_update_coeffs_ctrl(bw_peak_coeffs *BW_RESTRICT coeffs) {
_bw_peak_update_mm2_params(coeffs);
bw_mm2_update_coeffs_ctrl(&coeffs->mm2_coeffs);
}
static inline void bw_peak_update_coeffs_audio(bw_peak_coeffs *BW_RESTRICT coeffs) {
bw_mm2_update_coeffs_audio(&coeffs->mm2_coeffs);
}
static inline float bw_peak_process1(const bw_peak_coeffs *BW_RESTRICT coeffs, bw_peak_state *BW_RESTRICT state, float x) {
return bw_mm2_process1(&coeffs->mm2_coeffs, &state->mm2_state, x);
}
static inline void bw_peak_process(bw_peak_coeffs *BW_RESTRICT coeffs, bw_peak_state *BW_RESTRICT state, const float *x, float *y, int n_samples) {
bw_peak_update_coeffs_ctrl(coeffs);
for (int i = 0; i < n_samples; i++) {
bw_peak_update_coeffs_audio(coeffs);
y[i] = bw_peak_process1(coeffs, state, x[i]);
}
}
static inline void bw_peak_set_cutoff(bw_peak_coeffs *BW_RESTRICT coeffs, float value) {
bw_mm2_set_cutoff(&coeffs->mm2_coeffs, value);
}
static inline void bw_peak_set_Q(bw_mm2_coeffs *BW_RESTRICT coeffs, float value) {
if (coeffs->Q != value) {
coeffs->Q = value;
coeffs->param_changed |= _BW_HS2_PARAM_Q;
}
}
static inline void bw_peak_set_dc_gain_lin(bw_peak_coeffs *BW_RESTRICT coeffs, float value) {
if (coeffs->gain != value) {
coeffs->gain = value;
coeffs->param_changed |= _BW_HS2_PARAM_GAIN;
}
}
static inline void bw_peak_set_dc_gain_dB(bw_peak_coeffs *BW_RESTRICT coeffs, float value) {
bw_peak_set_dc_gain_lin(coeffs, bw_dB2linf_3(value));
}
static inline void bw_peak_set_slope(bw_peak_coeffs *BW_RESTRICT coeffs, float value) {
if (coeffs->slope != value) {
coeffs->slope = value;
coeffs->param_changed |= _BW_HS2_PARAM_SLOPE;
}
}
static inline void bw_peak_set_use_slope(bw_mm2_coeffs *BW_RESTRICT coeffs, char value) {
if ((coeffs->use_slope && !value) || (!coeffs->use_slope && value)) {
coeffs->use_slope = value;
coeffs->param_changed |= _BW_HS2_PARAM_Q | _BW_HS2_PARAM_SLOPE;
}
}
#undef _BW_PEAK_PARAM_GAIN
#undef _BW_PEAK_PARAM_Q
#undef _BW_PEAK_PARAM_BANDWIDTH
#ifdef __cplusplus
}
#endif
#endif