new modules bw_ap1, bw_ap2, bw_hp1, bw_notch2
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183
include/bw_ap1.h
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183
include/bw_ap1.h
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/*
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* Brickworks
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*
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* Copyright (C) 2022 Orastron Srl unipersonale
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*
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* Brickworks is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License.
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*
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* Brickworks is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Brickworks. If not, see <http://www.gnu.org/licenses/>.
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*
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* File author: Stefano D'Angelo
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*/
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/*!
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* module_type {{{ dsp }}}
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* version {{{ 0.3.0 }}}
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* requires {{{ bw_config bw_common bw_lp1 bw_math bw_one_pole }}}
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* description {{{
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* First-order allpass filter (90° shift at cutoff, approaching 180° shift
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* at high frequencies) with unitary gain.
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* }}}
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* changelog {{{
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* <ul>
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* <li>Version <strong>0.3.0</strong>:
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* <ul>
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* <li>First release.</li>
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* </ul>
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* </li>
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* </ul>
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* }}}
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*/
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#ifndef _BW_AP1_H
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#define _BW_AP1_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <bw_common.h>
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/*! api {{{
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* #### bw_ap1_coeffs
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* ```>>> */
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typedef struct _bw_ap1_coeffs bw_ap1_coeffs;
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/*! <<<```
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* Coefficients and related.
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*
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* #### bw_ap1_state
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* ```>>> */
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typedef struct _bw_ap1_state bw_ap1_state;
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/*! <<<```
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* Internal state and related.
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*
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* #### bw_ap1_init()
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* ```>>> */
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static inline void bw_ap1_init(bw_ap1_coeffs *BW_RESTRICT coeffs);
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/*! <<<```
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* Initializes input parameter values in `coeffs`.
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*
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* #### bw_ap1_set_sample_rate()
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* ```>>> */
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static inline void bw_ap1_set_sample_rate(bw_ap1_coeffs *BW_RESTRICT coeffs, float sample_rate);
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/*! <<<```
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* Sets the `sample_rate` (Hz) value in `coeffs`.
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*
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* #### bw_ap1_reset_coeffs()
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* ```>>> */
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static inline void bw_ap1_reset_coeffs(bw_ap1_coeffs *BW_RESTRICT coeffs);
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/*! <<<```
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* Resets coefficients in `coeffs` to assume their target values.
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*
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* #### bw_ap1_reset_state()
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* ```>>> */
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static inline void bw_ap1_reset_state(const bw_ap1_coeffs *BW_RESTRICT coeffs, bw_ap1_state *BW_RESTRICT state);
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/*! <<<```
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* Resets the given `state` to its initial values using the given `coeffs`.
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*
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* #### bw_ap1_update_coeffs_ctrl()
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* ```>>> */
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static inline void bw_ap1_update_coeffs_ctrl(bw_ap1_coeffs *BW_RESTRICT coeffs);
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/*! <<<```
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* Triggers control-rate update of coefficients in `coeffs`.
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*
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* #### bw_ap1_update_coeffs_audio()
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* ```>>> */
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static inline void bw_ap1_update_coeffs_audio(bw_ap1_coeffs *BW_RESTRICT coeffs);
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/*! <<<```
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* Triggers audio-rate update of coefficients in `coeffs`.
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*
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* #### bw_ap1_process1()
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* ```>>> */
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static inline float bw_ap1_process1(const bw_ap1_coeffs *BW_RESTRICT coeffs, bw_ap1_state *BW_RESTRICT state, float x);
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/*! <<<```
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* Processes one input sample `x` using `coeffs`, while using and updating
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* `state`. Returns the corresponding output sample.
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*
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* #### bw_ap1_process()
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* ```>>> */
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static inline void bw_ap1_process(bw_ap1_coeffs *BW_RESTRICT coeffs, bw_ap1_state *BW_RESTRICT state, const float *x, float *y, int n_samples);
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/*! <<<```
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* Processes the first `n_samples` of the input buffer `x` and fills the
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* first `n_samples` of the output buffer `y`, while using and updating both
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* `coeffs` and `state` (control and audio rate).
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*
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* #### bw_ap1_set_cutoff()
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* ```>>> */
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static inline void bw_ap1_set_cutoff(bw_ap1_coeffs *BW_RESTRICT coeffs, float value);
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/*! <<<```
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* Sets the cutoff frequency `value` (Hz) in `coeffs`.
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*
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* Default value: `1e3f`.
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* }}} */
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/*** Implementation ***/
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/* WARNING: This part of the file is not part of the public API. Its content may
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* change at any time in future versions. Please, do not use it directly. */
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#include <bw_lp1.h>
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struct _bw_ap1_coeffs {
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// Sub-components
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bw_lp1_coeffs lp1_coeffs;
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};
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struct _bw_ap1_state {
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bw_lp1_state lp1_state;
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};
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static inline void bw_ap1_init(bw_ap1_coeffs *BW_RESTRICT coeffs) {
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bw_lp1_init(&coeffs->lp1_coeffs);
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}
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static inline void bw_ap1_set_sample_rate(bw_ap1_coeffs *BW_RESTRICT coeffs, float sample_rate) {
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bw_lp1_set_sample_rate(&coeffs->lp1_coeffs, sample_rate);
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}
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static inline void bw_ap1_reset_coeffs(bw_ap1_coeffs *BW_RESTRICT coeffs) {
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bw_lp1_reset_coeffs(&coeffs->lp1_coeffs);
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}
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static inline void bw_ap1_reset_state(const bw_ap1_coeffs *BW_RESTRICT coeffs, bw_ap1_state *BW_RESTRICT state) {
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bw_lp1_reset_state(&coeffs->lp1_coeffs, &state->lp1_state);
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}
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static inline void bw_ap1_update_coeffs_ctrl(bw_ap1_coeffs *BW_RESTRICT coeffs) {
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bw_lp1_update_coeffs_ctrl(&coeffs->lp1_coeffs);
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}
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static inline void bw_ap1_update_coeffs_audio(bw_ap1_coeffs *BW_RESTRICT coeffs) {
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bw_lp1_update_coeffs_audio(&coeffs->lp1_coeffs);
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}
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static inline float bw_ap1_process1(const bw_ap1_coeffs *BW_RESTRICT coeffs, bw_ap1_state *BW_RESTRICT state, float x) {
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const float lp = bw_lp1_process1(&coeffs->lp1_coeffs, &state->lp1_state, x);
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return x - lp - lp;
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}
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static inline void bw_ap1_process(bw_ap1_coeffs *BW_RESTRICT coeffs, bw_ap1_state *BW_RESTRICT state, const float *x, float *y, int n_samples) {
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bw_ap1_update_coeffs_ctrl(coeffs);
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for (int i = 0; i < n_samples; i++) {
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bw_ap1_update_coeffs_audio(coeffs);
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y[i] = bw_ap1_process1(coeffs, state, x[i]);
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}
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}
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static inline void bw_ap1_set_cutoff(bw_ap1_coeffs *BW_RESTRICT coeffs, float value) {
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bw_lp1_set_cutoff(&coeffs->lp1_coeffs, value);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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199
include/bw_ap2.h
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199
include/bw_ap2.h
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@ -0,0 +1,199 @@
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/*
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* Brickworks
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*
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* Copyright (C) 2022 Orastron Srl unipersonale
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*
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* Brickworks is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License.
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*
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* Brickworks is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Brickworks. If not, see <http://www.gnu.org/licenses/>.
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*
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* File author: Stefano D'Angelo
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*/
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/*!
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* module_type {{{ dsp }}}
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* version {{{ 0.3.0 }}}
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* requires {{{ bw_config bw_common bw_math bw_one_pole bw_svf }}}
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* description {{{
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* Second-order allpass filter (180° shift at cutoff, approaching 360° shift
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* at high frequencies) with unitary gain.
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* }}}
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* changelog {{{
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* <ul>
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* <li>Version <strong>0.3.0</strong>:
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* <ul>
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* <li>First release.</li>
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* </ul>
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* </li>
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* </ul>
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* }}}
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*/
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#ifndef _BW_AP2_H
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#define _BW_AP2_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <bw_common.h>
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/*! api {{{
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* #### bw_ap2_coeffs
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* ```>>> */
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typedef struct _bw_ap2_coeffs bw_ap2_coeffs;
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/*! <<<```
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* Coefficients and related.
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*
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* #### bw_ap2_state
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* ```>>> */
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typedef struct _bw_ap2_state bw_ap2_state;
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/*! <<<```
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* Internal state and related.
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*
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* #### bw_ap2_init()
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* ```>>> */
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static inline void bw_ap2_init(bw_ap2_coeffs *BW_RESTRICT coeffs);
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/*! <<<```
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* Initializes input parameter values in `coeffs`.
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*
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* #### bw_ap2_set_sample_rate()
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* ```>>> */
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static inline void bw_ap2_set_sample_rate(bw_ap2_coeffs *BW_RESTRICT coeffs, float sample_rate);
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/*! <<<```
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* Sets the `sample_rate` (Hz) value in `coeffs`.
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*
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* #### bw_ap2_reset_coeffs()
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* ```>>> */
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static inline void bw_ap2_reset_coeffs(bw_ap2_coeffs *BW_RESTRICT coeffs);
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/*! <<<```
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* Resets coefficients in `coeffs` to assume their target values.
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*
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* #### bw_ap2_reset_state()
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* ```>>> */
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static inline void bw_ap2_reset_state(const bw_ap2_coeffs *BW_RESTRICT coeffs, bw_ap2_state *BW_RESTRICT state);
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/*! <<<```
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* Resets the given `state` to its initial values using the given `coeffs`.
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*
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* #### bw_ap2_update_coeffs_ctrl()
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* ```>>> */
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static inline void bw_ap2_update_coeffs_ctrl(bw_ap2_coeffs *BW_RESTRICT coeffs);
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/*! <<<```
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* Triggers control-rate update of coefficients in `coeffs`.
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*
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* #### bw_ap2_update_coeffs_audio()
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* ```>>> */
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static inline void bw_ap2_update_coeffs_audio(bw_ap2_coeffs *BW_RESTRICT coeffs);
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/*! <<<```
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* Triggers audio-rate update of coefficients in `coeffs`.
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*
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* #### bw_ap2_process1()
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* ```>>> */
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static inline float bw_ap2_process1(const bw_ap2_coeffs *BW_RESTRICT coeffs, bw_ap2_state *BW_RESTRICT state, float x);
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/*! <<<```
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* Processes one input sample `x` using `coeffs`, while using and updating
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* `state`. Returns the corresponding output sample.
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*
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* #### bw_ap2_process()
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* ```>>> */
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static inline void bw_ap2_process(bw_ap2_coeffs *BW_RESTRICT coeffs, bw_ap2_state *BW_RESTRICT state, const float *x, float *y, int n_samples);
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/*! <<<```
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* Processes the first `n_samples` of the input buffer `x` and fills the
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* first `n_samples` of the output buffer `y`, while using and updating both
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* `coeffs` and `state` (control and audio rate).
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*
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* #### bw_ap2_set_cutoff()
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* ```>>> */
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static inline void bw_ap2_set_cutoff(bw_ap2_coeffs *BW_RESTRICT coeffs, float value);
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/*! <<<```
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* Sets the cutoff frequency `value` (Hz) in `coeffs`.
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*
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* Default value: `1e3f`.
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*
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* #### bw_ap2_set_Q()
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* ```>>> */
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static inline void bw_ap2_set_Q(bw_svf_coeffs *BW_RESTRICT coeffs, float value);
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/*! <<<```
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* Sets the quality factor to the given `value` in `coeffs`.
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*
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* `value` must be equal or bigger than `0.5f`.
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*
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* Default value: `0.5f`.
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* }}} */
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/*** Implementation ***/
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/* WARNING: This part of the file is not part of the public API. Its content may
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* change at any time in future versions. Please, do not use it directly. */
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#include <bw_svf.h>
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struct _bw_ap2_coeffs {
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// Sub-components
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bw_svf_coeffs svf_coeffs;
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};
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struct _bw_ap2_state {
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bw_svf_state svf_state;
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};
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static inline void bw_ap2_init(bw_ap2_coeffs *BW_RESTRICT coeffs) {
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bw_svf_init(&coeffs->svf_coeffs);
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}
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static inline void bw_ap2_set_sample_rate(bw_ap2_coeffs *BW_RESTRICT coeffs, float sample_rate) {
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bw_svf_set_sample_rate(&coeffs->svf_coeffs, sample_rate);
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}
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static inline void bw_ap2_reset_coeffs(bw_ap2_coeffs *BW_RESTRICT coeffs) {
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bw_svf_reset_coeffs(&coeffs->svf_coeffs);
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}
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static inline void bw_ap2_reset_state(const bw_ap2_coeffs *BW_RESTRICT coeffs, bw_ap2_state *BW_RESTRICT state) {
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bw_svf_reset_state(&coeffs->svf_coeffs, &state->svf_state);
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}
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static inline void bw_ap2_update_coeffs_ctrl(bw_ap2_coeffs *BW_RESTRICT coeffs) {
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bw_svf_update_coeffs_ctrl(&coeffs->svf_coeffs);
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}
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static inline void bw_ap2_update_coeffs_audio(bw_ap2_coeffs *BW_RESTRICT coeffs) {
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bw_svf_update_coeffs_audio(&coeffs->svf_coeffs);
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}
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static inline float bw_ap2_process1(const bw_ap2_coeffs *BW_RESTRICT coeffs, bw_ap2_state *BW_RESTRICT state, float x) {
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float lp, bp, hp;
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bw_svf_process1(&coeffs->svf_coeffs, &state->svf_state, x, &lp, &bp, &hp);
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const float lh = lp + hp;
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return lh + lh - x;
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}
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static inline void bw_ap2_process(bw_ap2_coeffs *BW_RESTRICT coeffs, bw_ap2_state *BW_RESTRICT state, const float *x, float *y, int n_samples) {
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bw_ap2_update_coeffs_ctrl(coeffs);
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for (int i = 0; i < n_samples; i++) {
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bw_ap2_update_coeffs_audio(coeffs);
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y[i] = bw_ap2_process1(coeffs, state, x[i]);
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}
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}
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static inline void bw_ap2_set_cutoff(bw_ap2_coeffs *BW_RESTRICT coeffs, float value) {
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bw_svf_set_cutoff(&coeffs->svf_coeffs, value);
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}
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static inline void bw_ap2_set_Q(bw_svf_coeffs *BW_RESTRICT coeffs, float value) {
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bw_svf_set_Q(&coeffs->svf_coeffs, value);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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183
include/bw_hp1.h
Normal file
183
include/bw_hp1.h
Normal file
@ -0,0 +1,183 @@
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/*
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* Brickworks
|
||||
*
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||||
* Copyright (C) 2022 Orastron Srl unipersonale
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||||
*
|
||||
* 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
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*/
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||||
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/*!
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* module_type {{{ dsp }}}
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* version {{{ 0.3.0 }}}
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* requires {{{ bw_config bw_common bw_lp1 bw_math bw_one_pole }}}
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* description {{{
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* First-order highpass filter (6 dB/oct) with gain asymptotically
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* approaching unity as frequency increases.
|
||||
* }}}
|
||||
* changelog {{{
|
||||
* <ul>
|
||||
* <li>Version <strong>0.3.0</strong>:
|
||||
* <ul>
|
||||
* <li>First release.</li>
|
||||
* </ul>
|
||||
* </li>
|
||||
* </ul>
|
||||
* }}}
|
||||
*/
|
||||
|
||||
#ifndef _BW_HP1_H
|
||||
#define _BW_HP1_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
#include <bw_common.h>
|
||||
|
||||
/*! api {{{
|
||||
* #### bw_hp1_coeffs
|
||||
* ```>>> */
|
||||
typedef struct _bw_hp1_coeffs bw_hp1_coeffs;
|
||||
/*! <<<```
|
||||
* Coefficients and related.
|
||||
*
|
||||
* #### bw_hp1_state
|
||||
* ```>>> */
|
||||
typedef struct _bw_hp1_state bw_hp1_state;
|
||||
/*! <<<```
|
||||
* Internal state and related.
|
||||
*
|
||||
* #### bw_hp1_init()
|
||||
* ```>>> */
|
||||
static inline void bw_hp1_init(bw_hp1_coeffs *BW_RESTRICT coeffs);
|
||||
/*! <<<```
|
||||
* Initializes input parameter values in `coeffs`.
|
||||
*
|
||||
* #### bw_hp1_set_sample_rate()
|
||||
* ```>>> */
|
||||
static inline void bw_hp1_set_sample_rate(bw_hp1_coeffs *BW_RESTRICT coeffs, float sample_rate);
|
||||
/*! <<<```
|
||||
* Sets the `sample_rate` (Hz) value in `coeffs`.
|
||||
*
|
||||
* #### bw_hp1_reset_coeffs()
|
||||
* ```>>> */
|
||||
static inline void bw_hp1_reset_coeffs(bw_hp1_coeffs *BW_RESTRICT coeffs);
|
||||
/*! <<<```
|
||||
* Resets coefficients in `coeffs` to assume their target values.
|
||||
*
|
||||
* #### bw_hp1_reset_state()
|
||||
* ```>>> */
|
||||
static inline void bw_hp1_reset_state(const bw_hp1_coeffs *BW_RESTRICT coeffs, bw_hp1_state *BW_RESTRICT state);
|
||||
/*! <<<```
|
||||
* Resets the given `state` to its initial values using the given `coeffs`.
|
||||
*
|
||||
* #### bw_hp1_update_coeffs_ctrl()
|
||||
* ```>>> */
|
||||
static inline void bw_hp1_update_coeffs_ctrl(bw_hp1_coeffs *BW_RESTRICT coeffs);
|
||||
/*! <<<```
|
||||
* Triggers control-rate update of coefficients in `coeffs`.
|
||||
*
|
||||
* #### bw_hp1_update_coeffs_audio()
|
||||
* ```>>> */
|
||||
static inline void bw_hp1_update_coeffs_audio(bw_hp1_coeffs *BW_RESTRICT coeffs);
|
||||
/*! <<<```
|
||||
* Triggers audio-rate update of coefficients in `coeffs`.
|
||||
*
|
||||
* #### bw_hp1_process1()
|
||||
* ```>>> */
|
||||
static inline float bw_hp1_process1(const bw_hp1_coeffs *BW_RESTRICT coeffs, bw_hp1_state *BW_RESTRICT state, float x);
|
||||
/*! <<<```
|
||||
* Processes one input sample `x` using `coeffs`, while using and updating
|
||||
* `state`. Returns the corresponding output sample.
|
||||
*
|
||||
* #### bw_hp1_process()
|
||||
* ```>>> */
|
||||
static inline void bw_hp1_process(bw_hp1_coeffs *BW_RESTRICT coeffs, bw_hp1_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_hp1_set_cutoff()
|
||||
* ```>>> */
|
||||
static inline void bw_hp1_set_cutoff(bw_hp1_coeffs *BW_RESTRICT coeffs, float value);
|
||||
/*! <<<```
|
||||
* Sets the cutoff frequency `value` (Hz) in `coeffs`.
|
||||
*
|
||||
* Default value: `1e3f`.
|
||||
* }}} */
|
||||
|
||||
/*** 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_lp1.h>
|
||||
|
||||
struct _bw_hp1_coeffs {
|
||||
// Sub-components
|
||||
bw_lp1_coeffs lp1_coeffs;
|
||||
};
|
||||
|
||||
struct _bw_hp1_state {
|
||||
bw_lp1_state lp1_state;
|
||||
};
|
||||
|
||||
static inline void bw_hp1_init(bw_hp1_coeffs *BW_RESTRICT coeffs) {
|
||||
bw_lp1_init(&coeffs->lp1_coeffs);
|
||||
}
|
||||
|
||||
static inline void bw_hp1_set_sample_rate(bw_hp1_coeffs *BW_RESTRICT coeffs, float sample_rate) {
|
||||
bw_lp1_set_sample_rate(&coeffs->lp1_coeffs, sample_rate);
|
||||
}
|
||||
|
||||
static inline void bw_hp1_reset_coeffs(bw_hp1_coeffs *BW_RESTRICT coeffs) {
|
||||
bw_lp1_reset_coeffs(&coeffs->lp1_coeffs);
|
||||
}
|
||||
|
||||
static inline void bw_hp1_reset_state(const bw_hp1_coeffs *BW_RESTRICT coeffs, bw_hp1_state *BW_RESTRICT state) {
|
||||
bw_lp1_reset_state(&coeffs->lp1_coeffs, &state->lp1_state);
|
||||
}
|
||||
|
||||
static inline void bw_hp1_update_coeffs_ctrl(bw_hp1_coeffs *BW_RESTRICT coeffs) {
|
||||
bw_lp1_update_coeffs_ctrl(&coeffs->lp1_coeffs);
|
||||
}
|
||||
|
||||
static inline void bw_hp1_update_coeffs_audio(bw_hp1_coeffs *BW_RESTRICT coeffs) {
|
||||
bw_lp1_update_coeffs_audio(&coeffs->lp1_coeffs);
|
||||
}
|
||||
|
||||
static inline float bw_hp1_process1(const bw_hp1_coeffs *BW_RESTRICT coeffs, bw_hp1_state *BW_RESTRICT state, float x) {
|
||||
const float lp = bw_lp1_process1(&coeffs->lp1_coeffs, &state->lp1_state, x);
|
||||
return x - lp;
|
||||
}
|
||||
|
||||
static inline void bw_hp1_process(bw_hp1_coeffs *BW_RESTRICT coeffs, bw_hp1_state *BW_RESTRICT state, const float *x, float *y, int n_samples) {
|
||||
bw_hp1_update_coeffs_ctrl(coeffs);
|
||||
for (int i = 0; i < n_samples; i++) {
|
||||
bw_hp1_update_coeffs_audio(coeffs);
|
||||
y[i] = bw_hp1_process1(coeffs, state, x[i]);
|
||||
}
|
||||
}
|
||||
|
||||
static inline void bw_hp1_set_cutoff(bw_hp1_coeffs *BW_RESTRICT coeffs, float value) {
|
||||
bw_lp1_set_cutoff(&coeffs->lp1_coeffs, value);
|
||||
}
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
198
include/bw_notch2.h
Normal file
198
include/bw_notch2.h
Normal file
@ -0,0 +1,198 @@
|
||||
/*
|
||||
* Brickworks
|
||||
*
|
||||
* Copyright (C) 2022 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_math bw_one_pole bw_svf }}}
|
||||
* description {{{
|
||||
* Second-order notch filter with unitary gain at DC and asymptotically as
|
||||
* frequency increases, and null gain at cutoff frequency.
|
||||
* }}}
|
||||
* changelog {{{
|
||||
* <ul>
|
||||
* <li>Version <strong>0.3.0</strong>:
|
||||
* <ul>
|
||||
* <li>First release.</li>
|
||||
* </ul>
|
||||
* </li>
|
||||
* </ul>
|
||||
* }}}
|
||||
*/
|
||||
|
||||
#ifndef _BW_NOTCH2_H
|
||||
#define _BW_NOTCH2_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
#include <bw_common.h>
|
||||
|
||||
/*! api {{{
|
||||
* #### bw_notch2_coeffs
|
||||
* ```>>> */
|
||||
typedef struct _bw_notch2_coeffs bw_notch2_coeffs;
|
||||
/*! <<<```
|
||||
* Coefficients and related.
|
||||
*
|
||||
* #### bw_notch2_state
|
||||
* ```>>> */
|
||||
typedef struct _bw_notch2_state bw_notch2_state;
|
||||
/*! <<<```
|
||||
* Internal state and related.
|
||||
*
|
||||
* #### bw_notch2_init()
|
||||
* ```>>> */
|
||||
static inline void bw_notch2_init(bw_notch2_coeffs *BW_RESTRICT coeffs);
|
||||
/*! <<<```
|
||||
* Initializes input parameter values in `coeffs`.
|
||||
*
|
||||
* #### bw_notch2_set_sample_rate()
|
||||
* ```>>> */
|
||||
static inline void bw_notch2_set_sample_rate(bw_notch2_coeffs *BW_RESTRICT coeffs, float sample_rate);
|
||||
/*! <<<```
|
||||
* Sets the `sample_rate` (Hz) value in `coeffs`.
|
||||
*
|
||||
* #### bw_notch2_reset_coeffs()
|
||||
* ```>>> */
|
||||
static inline void bw_notch2_reset_coeffs(bw_notch2_coeffs *BW_RESTRICT coeffs);
|
||||
/*! <<<```
|
||||
* Resets coefficients in `coeffs` to assume their target values.
|
||||
*
|
||||
* #### bw_notch2_reset_state()
|
||||
* ```>>> */
|
||||
static inline void bw_notch2_reset_state(const bw_notch2_coeffs *BW_RESTRICT coeffs, bw_notch2_state *BW_RESTRICT state);
|
||||
/*! <<<```
|
||||
* Resets the given `state` to its initial values using the given `coeffs`.
|
||||
*
|
||||
* #### bw_notch2_update_coeffs_ctrl()
|
||||
* ```>>> */
|
||||
static inline void bw_notch2_update_coeffs_ctrl(bw_notch2_coeffs *BW_RESTRICT coeffs);
|
||||
/*! <<<```
|
||||
* Triggers control-rate update of coefficients in `coeffs`.
|
||||
*
|
||||
* #### bw_notch2_update_coeffs_audio()
|
||||
* ```>>> */
|
||||
static inline void bw_notch2_update_coeffs_audio(bw_notch2_coeffs *BW_RESTRICT coeffs);
|
||||
/*! <<<```
|
||||
* Triggers audio-rate update of coefficients in `coeffs`.
|
||||
*
|
||||
* #### bw_notch2_process1()
|
||||
* ```>>> */
|
||||
static inline float bw_notch2_process1(const bw_notch2_coeffs *BW_RESTRICT coeffs, bw_notch2_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()
|
||||
* ```>>> */
|
||||
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);
|
||||
/*! <<<```
|
||||
* 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()
|
||||
* ```>>> */
|
||||
static inline void bw_notch2_set_cutoff(bw_notch2_coeffs *BW_RESTRICT coeffs, float value);
|
||||
/*! <<<```
|
||||
* Sets the cutoff frequency `value` (Hz) in `coeffs`.
|
||||
*
|
||||
* Default value: `1e3f`.
|
||||
*
|
||||
* #### bw_notch2_set_Q()
|
||||
* ```>>> */
|
||||
static inline void bw_notch2_set_Q(bw_svf_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`.
|
||||
* }}} */
|
||||
|
||||
/*** 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_svf.h>
|
||||
|
||||
struct _bw_notch2_coeffs {
|
||||
// Sub-components
|
||||
bw_svf_coeffs svf_coeffs;
|
||||
};
|
||||
|
||||
struct _bw_notch2_state {
|
||||
bw_svf_state svf_state;
|
||||
};
|
||||
|
||||
static inline void bw_notch2_init(bw_notch2_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) {
|
||||
bw_svf_set_sample_rate(&coeffs->svf_coeffs, sample_rate);
|
||||
}
|
||||
|
||||
static inline void bw_notch2_reset_coeffs(bw_notch2_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) {
|
||||
bw_svf_reset_state(&coeffs->svf_coeffs, &state->svf_state);
|
||||
}
|
||||
|
||||
static inline void bw_notch2_update_coeffs_ctrl(bw_notch2_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) {
|
||||
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) {
|
||||
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);
|
||||
for (int i = 0; i < n_samples; i++) {
|
||||
bw_notch2_update_coeffs_audio(coeffs);
|
||||
y[i] = bw_notch2_process1(coeffs, state, x[i]);
|
||||
}
|
||||
}
|
||||
|
||||
static inline void bw_notch2_set_cutoff(bw_notch2_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) {
|
||||
bw_svf_set_Q(&coeffs->svf_coeffs, value);
|
||||
}
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user