642 lines
20 KiB
C++
642 lines
20 KiB
C++
/*
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* Brickworks
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*
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* Copyright (C) 2022, 2023 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 {{{ 1.0.0 }}}
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* requires {{{ bw_common bw_math bw_one_pole }}}
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* description {{{
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* State variable filter (2nd order, 12 dB/oct) model with separated lowpass,
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* bandpass, and highpass outputs.
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* }}}
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* changelog {{{
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* <ul>
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* <li>Version <strong>1.0.0</strong>:
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* <ul>
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* <li><code>bw_svf_process()</code> and
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* <code>bw_svf_process_multi()</code> now use <code>size_t</code>
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* to count samples and channels.</li>
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* <li>Added more <code>const</code> and <code>BW_RESTRICT</code>
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* specifiers to input arguments and implementation.</li>
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* <li>Moved C++ code to C header.</li>
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* <li>Added overladed C++ <code>process()</code> function taking
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* C-style arrays as arguments.</li>
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* <li>Removed usage of reserved identifiers.</li>
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* </ul>
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* </li>
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* <li>Version <strong>0.6.0</strong>:
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* <ul>
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* <li>Removed dependency on bw_config.</li>
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* </ul>
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* </li>
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* <li>Version <strong>0.5.0</strong>:
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* <ul>
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* <li>Added <code>bw_svf_process_multi()</code>.</li>
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* <li>Fixed bug in <code>bw_svf_process()</code> when only
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* <code>y_hp</code> is <code>NULL</code>.</li>
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* <li>Fixed prewarping-related stability bug.</li>
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* <li>Added C++ wrapper.</li>
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* </ul>
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* </li>
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* <li>Version <strong>0.4.0</strong>:
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* <ul>
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* <li>Added initial input value to
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* <code>bw_svf_reset_state()</code>.</li>
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* <li>Fixed unused parameter warnings.</li>
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* </ul>
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* </li>
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* <li>Version <strong>0.3.0</strong>:
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* <ul>
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* <li>Strenghtened algorithm for modulation.</li>
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* <li>Added prewarping control parameters (prewarp_at_cutoff and
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* prewarp_freq).</li>
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* <li>Added <code>BW_RESTRICT</code> to
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* <code>bw_svf_process1()</code>.</li>
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* <li>Fixed typo in <code>bw_svf_set_Q()</code> documentation.</li>
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* </ul>
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* </li>
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* <li>Version <strong>0.2.0</strong>:
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* <ul>
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* <li>Refactored API.</li>
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* </ul>
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* </li>
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* <li>Version <strong>0.1.0</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_SVF_H
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#define BW_SVF_H
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#include <bw_common.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*! api {{{
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* #### bw_svf_coeffs
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* ```>>> */
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typedef struct bw_svf_coeffs bw_svf_coeffs;
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/*! <<<```
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* Coefficients and related.
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*
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* #### bw_svf_state
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* ```>>> */
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typedef struct bw_svf_state bw_svf_state;
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/*! <<<```
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* Internal state and related.
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*
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* #### bw_svf_init()
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* ```>>> */
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static inline void bw_svf_init(bw_svf_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_svf_set_sample_rate()
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* ```>>> */
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static inline void bw_svf_set_sample_rate(bw_svf_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_svf_reset_coeffs()
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* ```>>> */
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static inline void bw_svf_reset_coeffs(bw_svf_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_svf_reset_state()
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* ```>>> */
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static inline void bw_svf_reset_state(const bw_svf_coeffs *BW_RESTRICT coeffs, bw_svf_state *BW_RESTRICT state, float x_0);
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/*! <<<```
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* Resets the given `state` to its initial values using the given `coeffs`
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* and the quiescent/initial input value `x_0`.
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*
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* #### bw_svf_update_coeffs_ctrl()
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* ```>>> */
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static inline void bw_svf_update_coeffs_ctrl(bw_svf_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_svf_update_coeffs_audio()
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* ```>>> */
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static inline void bw_svf_update_coeffs_audio(bw_svf_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_svf_process1()
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* ```>>> */
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static inline void bw_svf_process1(const bw_svf_coeffs *BW_RESTRICT coeffs, bw_svf_state *BW_RESTRICT state, float x, float *BW_RESTRICT y_lp, float *BW_RESTRICT y_bp, float *BW_RESTRICT y_hp);
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/*! <<<```
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* Processes one input sample `x` using `coeffs`, while using and updating
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* `state`. The lowpass, bandpass, and highpass output samples are put into
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* `y_lp`, `y_bp`, and `y_hp` respectively.
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*
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* #### bw_svf_process()
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* ```>>> */
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static inline void bw_svf_process(bw_svf_coeffs *BW_RESTRICT coeffs, bw_svf_state *BW_RESTRICT state, const float *x, float *y_lp, float *y_bp, float *y_hp, size_t 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 buffers `y_lp` (lowpass), `y_bp`
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* (bandpass), and `y_hp` (highpass), if they are not `NULL`, while using and
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* updating both `coeffs` and `state` (control and audio rate).
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*
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* #### bw_svf_process_multi()
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* ```>>> */
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static inline void bw_svf_process_multi(bw_svf_coeffs *BW_RESTRICT coeffs, bw_svf_state *BW_RESTRICT const *BW_RESTRICT state, const float * const *x, float * const *y_lp, float * const *y_bp, float * const *y_hp, size_t n_channels, size_t n_samples);
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/*! <<<```
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* Processes the first `n_samples` of the `n_channels` input buffers `x` and
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* fills the first `n_samples` of the `n_channels` output buffers `y_lp`
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* (lowpass), `y_bp` (bandpass), and `y_hp` (highpass), while using and
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* updating both the common `coeffs` and each of the `n_channels` `state`s
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* (control and audio rate).
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*
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* `y_lp`, `y_bp`, and `y_hp`, or any of their elements may be `NULL`.
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*
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* #### bw_svf_set_cutoff()
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* ```>>> */
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static inline void bw_svf_set_cutoff(bw_svf_coeffs *BW_RESTRICT coeffs, float value);
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/*! <<<```
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* Sets the cutoff frequency to the given `value` (Hz) in `coeffs`.
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*
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* `value` must be positive and smaller than the Nyquist frequency (half the
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* sample rate).
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*
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* Default value: `1e3f`.
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*
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* #### bw_svf_set_Q()
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* ```>>> */
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static inline void bw_svf_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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* #### bw_svf_set_prewarp_at_cutoff()
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* ```>>> */
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static inline void bw_svf_set_prewarp_at_cutoff(bw_svf_coeffs *BW_RESTRICT coeffs, char value);
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/*! <<<```
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* Sets whether bilinear transform prewarping frequency should match the
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* cutoff frequency (non-`0`) or not (`0`).
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*
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* Default value: non-`0` (on).
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*
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* #### bw_svf_set_prewarp_freq()
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* ```>>> */
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static inline void bw_svf_set_prewarp_freq(bw_svf_coeffs *BW_RESTRICT coeffs, float value);
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/*! <<<```
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* Sets the prewarping frequency `value` (Hz) in `coeffs`.
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*
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* Only used when the prewarp\_at\_cutoff parameter is off.
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*
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* Default value: `1e3f`.
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* }}} */
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#ifdef __cplusplus
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}
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#endif
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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_math.h>
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#include <bw_one_pole.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct bw_svf_coeffs {
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// Sub-components
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bw_one_pole_coeffs smooth_coeffs;
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bw_one_pole_state smooth_cutoff_state;
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bw_one_pole_state smooth_Q_state;
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bw_one_pole_state smooth_prewarp_freq_state;
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// Coefficients
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float t_k;
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float prewarp_k;
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float t;
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float kf;
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float kbl;
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float k;
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float hp_hb;
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float hp_x;
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// Parameters
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float cutoff;
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float Q;
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float prewarp_freq;
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};
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struct bw_svf_state {
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float hp_z1;
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float lp_z1;
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float bp_z1;
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float cutoff_z1;
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};
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static inline void bw_svf_init(bw_svf_coeffs *BW_RESTRICT coeffs) {
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bw_one_pole_init(&coeffs->smooth_coeffs);
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bw_one_pole_set_tau(&coeffs->smooth_coeffs, 0.005f);
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bw_one_pole_set_sticky_thresh(&coeffs->smooth_coeffs, 1e-3f);
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coeffs->cutoff = 1e3f;
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coeffs->Q = 0.5f;
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coeffs->prewarp_freq = 1e3f;
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coeffs->prewarp_k = 1.f;
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}
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static inline void bw_svf_set_sample_rate(bw_svf_coeffs *BW_RESTRICT coeffs, float sample_rate) {
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bw_one_pole_set_sample_rate(&coeffs->smooth_coeffs, sample_rate);
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bw_one_pole_reset_coeffs(&coeffs->smooth_coeffs);
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coeffs->t_k = 3.141592653589793f / sample_rate;
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}
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static inline void bw_svf_do_update_coeffs(bw_svf_coeffs *BW_RESTRICT coeffs, char force) {
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const float prewarp_freq = coeffs->prewarp_freq + coeffs->prewarp_k * (coeffs->cutoff - coeffs->prewarp_freq);
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float cutoff_cur = bw_one_pole_get_y_z1(&coeffs->smooth_cutoff_state);
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float prewarp_freq_cur = bw_one_pole_get_y_z1(&coeffs->smooth_prewarp_freq_state);
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float Q_cur = bw_one_pole_get_y_z1(&coeffs->smooth_Q_state);
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const char cutoff_changed = force || coeffs->cutoff != cutoff_cur;
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const char prewarp_freq_changed = force || prewarp_freq != prewarp_freq_cur;
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const char Q_changed = force || coeffs->Q != Q_cur;
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if (cutoff_changed || prewarp_freq_changed || Q_changed) {
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if (cutoff_changed || prewarp_freq_changed) {
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if (cutoff_changed)
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cutoff_cur = bw_one_pole_process1_sticky_rel(&coeffs->smooth_coeffs, &coeffs->smooth_cutoff_state, coeffs->cutoff);
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if (prewarp_freq_changed) {
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prewarp_freq_cur = bw_one_pole_process1_sticky_rel(&coeffs->smooth_coeffs, &coeffs->smooth_prewarp_freq_state, prewarp_freq);
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coeffs->t = bw_tanf(coeffs->t_k * prewarp_freq_cur);
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coeffs->kf = coeffs->t * bw_rcpf(prewarp_freq_cur);
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}
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coeffs->kbl = coeffs->kf * cutoff_cur;
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}
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if (Q_changed) {
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Q_cur = bw_one_pole_process1_sticky_abs(&coeffs->smooth_coeffs, &coeffs->smooth_Q_state, coeffs->Q);
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coeffs->k = bw_rcpf(Q_cur);
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}
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coeffs->hp_hb = coeffs->k + coeffs->kbl;
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coeffs->hp_x = bw_rcpf(1.f + coeffs->kbl * coeffs->hp_hb);
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}
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}
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static inline void bw_svf_reset_coeffs(bw_svf_coeffs *BW_RESTRICT coeffs) {
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bw_one_pole_reset_state(&coeffs->smooth_coeffs, &coeffs->smooth_cutoff_state, coeffs->cutoff);
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bw_one_pole_reset_state(&coeffs->smooth_coeffs, &coeffs->smooth_Q_state, coeffs->Q);
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bw_one_pole_reset_state(&coeffs->smooth_coeffs, &coeffs->smooth_prewarp_freq_state, coeffs->prewarp_freq + coeffs->prewarp_k * (coeffs->cutoff - coeffs->prewarp_freq));
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bw_svf_do_update_coeffs(coeffs, 1);
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}
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static inline void bw_svf_reset_state(const bw_svf_coeffs *BW_RESTRICT coeffs, bw_svf_state *BW_RESTRICT state, float x_0) {
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state->hp_z1 = 0.f;
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state->lp_z1 = x_0;
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state->bp_z1 = 0.f;
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state->cutoff_z1 = coeffs->cutoff;
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}
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static inline void bw_svf_update_coeffs_ctrl(bw_svf_coeffs *BW_RESTRICT coeffs) {
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(void)coeffs;
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}
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static inline void bw_svf_update_coeffs_audio(bw_svf_coeffs *BW_RESTRICT coeffs) {
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bw_svf_do_update_coeffs(coeffs, 0);
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}
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static inline void bw_svf_process1(const bw_svf_coeffs *BW_RESTRICT coeffs, bw_svf_state *BW_RESTRICT state, float x, float *BW_RESTRICT y_lp, float *BW_RESTRICT y_bp, float *BW_RESTRICT y_hp) {
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const float kk = coeffs->kf * state->cutoff_z1;
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const float lp_xz1 = state->lp_z1 - kk * state->bp_z1;
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const float bp_xz1 = state->bp_z1 - kk * state->hp_z1;
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*y_hp = coeffs->hp_x * (x + coeffs->hp_hb * bp_xz1 - lp_xz1);
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*y_bp = bp_xz1 - coeffs->kbl * *y_hp;
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*y_lp = lp_xz1 - coeffs->kbl * *y_bp;
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state->hp_z1 = *y_hp;
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state->lp_z1 = *y_lp;
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state->bp_z1 = *y_bp;
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state->cutoff_z1 = bw_one_pole_get_y_z1(&coeffs->smooth_cutoff_state);
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}
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static inline void bw_svf_process(bw_svf_coeffs *BW_RESTRICT coeffs, bw_svf_state *BW_RESTRICT state, const float *x, float *y_lp, float *y_bp, float *y_hp, size_t n_samples) {
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if (y_lp != NULL) {
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if (y_bp != NULL) {
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if (y_hp != NULL) {
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for (size_t i = 0; i < n_samples; i++) {
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bw_svf_update_coeffs_audio(coeffs);
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bw_svf_process1(coeffs, state, x[i], y_lp + i, y_bp + i, y_hp + i);
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}
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} else {
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for (size_t i = 0; i < n_samples; i++) {
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bw_svf_update_coeffs_audio(coeffs);
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float v_hp;
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bw_svf_process1(coeffs, state, x[i], y_lp + i, y_bp + i, &v_hp);
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}
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}
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} else {
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if (y_hp != NULL) {
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for (size_t i = 0; i < n_samples; i++) {
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bw_svf_update_coeffs_audio(coeffs);
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float v_bp;
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bw_svf_process1(coeffs, state, x[i], y_lp + i, &v_bp, y_hp + i);
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}
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} else {
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for (size_t i = 0; i < n_samples; i++) {
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bw_svf_update_coeffs_audio(coeffs);
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float v_bp, v_hp;
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bw_svf_process1(coeffs, state, x[i], y_lp + i, &v_bp, &v_hp);
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}
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}
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}
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} else {
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if (y_bp != NULL) {
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if (y_hp != NULL) {
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for (size_t i = 0; i < n_samples; i++) {
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bw_svf_update_coeffs_audio(coeffs);
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float v_lp;
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bw_svf_process1(coeffs, state, x[i], &v_lp, y_bp + i, y_hp + i);
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}
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} else {
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for (size_t i = 0; i < n_samples; i++) {
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bw_svf_update_coeffs_audio(coeffs);
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float v_lp, v_hp;
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bw_svf_process1(coeffs, state, x[i], &v_lp, y_bp + i, &v_hp);
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}
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}
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} else {
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if (y_hp != NULL) {
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for (size_t i = 0; i < n_samples; i++) {
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bw_svf_update_coeffs_audio(coeffs);
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float v_lp, v_bp;
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bw_svf_process1(coeffs, state, x[i], &v_lp, &v_bp, y_hp + i);
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}
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} else {
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for (size_t i = 0; i < n_samples; i++) {
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bw_svf_update_coeffs_audio(coeffs);
|
|
float v_lp, v_bp, v_hp;
|
|
bw_svf_process1(coeffs, state, x[i], &v_lp, &v_bp, &v_hp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void bw_svf_process_multi(bw_svf_coeffs *BW_RESTRICT coeffs, bw_svf_state *BW_RESTRICT const *BW_RESTRICT state, const float * const *x, float * const *y_lp, float * const *y_bp, float * const *y_hp, size_t n_channels, size_t n_samples) {
|
|
if (y_lp != NULL) {
|
|
if (y_bp != NULL) {
|
|
if (y_hp != NULL) {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
for (size_t j = 0; j < n_channels; j++) {
|
|
float v_lp, v_bp, v_hp;
|
|
bw_svf_process1(coeffs, state[j], x[j][i], &v_lp, &v_bp, &v_hp);
|
|
if (y_lp[j])
|
|
y_lp[j][i] = v_lp;
|
|
if (y_bp[j])
|
|
y_bp[j][i] = v_bp;
|
|
if (y_hp[j])
|
|
y_hp[j][i] = v_hp;
|
|
}
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
for (size_t j = 0; j < n_channels; j++) {
|
|
float v_lp, v_bp, v_hp;
|
|
bw_svf_process1(coeffs, state[j], x[j][i], &v_lp, &v_bp, &v_hp);
|
|
if (y_lp[j])
|
|
y_lp[j][i] = v_lp;
|
|
if (y_bp[j])
|
|
y_bp[j][i] = v_bp;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (y_hp != NULL) {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
for (size_t j = 0; j < n_channels; j++) {
|
|
float v_lp, v_bp, v_hp;
|
|
bw_svf_process1(coeffs, state[j], x[j][i], &v_lp, &v_bp, &v_hp);
|
|
if (y_lp[j])
|
|
y_lp[j][i] = v_lp;
|
|
if (y_hp[j])
|
|
y_hp[j][i] = v_hp;
|
|
}
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
for (size_t j = 0; j < n_channels; j++) {
|
|
float v_lp, v_bp, v_hp;
|
|
bw_svf_process1(coeffs, state[j], x[j][i], &v_lp, &v_bp, &v_hp);
|
|
if (y_lp[j])
|
|
y_lp[j][i] = v_lp;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (y_bp != NULL) {
|
|
if (y_hp != NULL) {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
for (size_t j = 0; j < n_channels; j++) {
|
|
float v_lp, v_bp, v_hp;
|
|
bw_svf_process1(coeffs, state[j], x[j][i], &v_lp, &v_bp, &v_hp);
|
|
if (y_bp[j])
|
|
y_bp[j][i] = v_bp;
|
|
if (y_hp[j])
|
|
y_hp[j][i] = v_hp;
|
|
}
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
for (size_t j = 0; j < n_channels; j++) {
|
|
float v_lp, v_bp, v_hp;
|
|
bw_svf_process1(coeffs, state[j], x[j][i], &v_lp, &v_bp, &v_hp);
|
|
if (y_bp[j])
|
|
y_bp[j][i] = v_bp;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (y_hp != NULL) {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
for (size_t j = 0; j < n_channels; j++) {
|
|
float v_lp, v_bp, v_hp;
|
|
bw_svf_process1(coeffs, state[j], x[j][i], &v_lp, &v_bp, &v_hp);
|
|
if (y_hp[j])
|
|
y_hp[j][i] = v_hp;
|
|
}
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
for (size_t j = 0; j < n_channels; j++) {
|
|
float v_lp, v_bp, v_hp;
|
|
bw_svf_process1(coeffs, state[j], x[j][i], &v_lp, &v_bp, &v_hp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void bw_svf_set_cutoff(bw_svf_coeffs *BW_RESTRICT coeffs, float value) {
|
|
coeffs->cutoff = value;
|
|
}
|
|
|
|
static inline void bw_svf_set_Q(bw_svf_coeffs *BW_RESTRICT coeffs, float value) {
|
|
coeffs->Q = value;
|
|
}
|
|
|
|
static inline void bw_svf_set_prewarp_at_cutoff(bw_svf_coeffs *BW_RESTRICT coeffs, char value) {
|
|
coeffs->prewarp_k = value ? 1.f : 0.f;
|
|
}
|
|
|
|
static inline void bw_svf_set_prewarp_freq(bw_svf_coeffs *BW_RESTRICT coeffs, float value) {
|
|
coeffs->prewarp_freq = value;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
|
|
#include <array>
|
|
|
|
namespace Brickworks {
|
|
|
|
/*** Public C++ API ***/
|
|
|
|
/*! api_cpp {{{
|
|
* ##### Brickworks::SVF
|
|
* ```>>> */
|
|
template<size_t N_CHANNELS>
|
|
class SVF {
|
|
public:
|
|
SVF();
|
|
|
|
void setSampleRate(float sampleRate);
|
|
void reset(float x_0 = 0.f);
|
|
void process(
|
|
const float * const *x,
|
|
float * const *y_lp,
|
|
float * const *y_bp,
|
|
float * const *y_hp,
|
|
size_t nSamples);
|
|
void process(
|
|
std::array<const float *, N_CHANNELS> x,
|
|
std::array<float *, N_CHANNELS> y_lp,
|
|
std::array<float *, N_CHANNELS> y_bp,
|
|
std::array<float *, N_CHANNELS> y_hp,
|
|
size_t nSamples);
|
|
|
|
void setCutoff(float value);
|
|
void setQ(float value);
|
|
void setPrewarpAtCutoff(bool value);
|
|
void setPrewarpFreq(float value);
|
|
/*! <<<...
|
|
* }
|
|
* ```
|
|
* }}} */
|
|
|
|
/*** 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. */
|
|
|
|
private:
|
|
bw_svf_coeffs coeffs;
|
|
bw_svf_state states[N_CHANNELS];
|
|
bw_svf_state *BW_RESTRICT statesP[N_CHANNELS];
|
|
};
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline SVF<N_CHANNELS>::SVF() {
|
|
bw_svf_init(&coeffs);
|
|
for (size_t i = 0; i < N_CHANNELS; i++)
|
|
statesP[i] = states + i;
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void SVF<N_CHANNELS>::setSampleRate(float sampleRate) {
|
|
bw_svf_set_sample_rate(&coeffs, sampleRate);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void SVF<N_CHANNELS>::reset(float x_0) {
|
|
bw_svf_reset_coeffs(&coeffs);
|
|
for (size_t i = 0; i < N_CHANNELS; i++)
|
|
bw_svf_reset_state(&coeffs, states + i, x_0);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void SVF<N_CHANNELS>::process(
|
|
const float * const *x,
|
|
float * const *y_lp,
|
|
float * const *y_bp,
|
|
float * const *y_hp,
|
|
size_t nSamples) {
|
|
bw_svf_process_multi(&coeffs, statesP, x, y_lp, y_bp, y_hp, N_CHANNELS, nSamples);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void SVF<N_CHANNELS>::process(
|
|
std::array<const float *, N_CHANNELS> x,
|
|
std::array<float *, N_CHANNELS> y_lp,
|
|
std::array<float *, N_CHANNELS> y_bp,
|
|
std::array<float *, N_CHANNELS> y_hp,
|
|
size_t nSamples) {
|
|
process(x.data(), y_lp.data(), y_bp.data(), y_hp.data(), nSamples);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void SVF<N_CHANNELS>::setCutoff(float value) {
|
|
bw_svf_set_cutoff(&coeffs, value);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void SVF<N_CHANNELS>::setQ(float value) {
|
|
bw_svf_set_Q(&coeffs, value);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void SVF<N_CHANNELS>::setPrewarpAtCutoff(bool value) {
|
|
bw_svf_set_prewarp_at_cutoff(&coeffs, value);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void SVF<N_CHANNELS>::setPrewarpFreq(float value) {
|
|
bw_svf_set_prewarp_freq(&coeffs, value);
|
|
}
|
|
|
|
}
|
|
#endif
|
|
|
|
#endif
|