1240 lines
38 KiB
C++
1240 lines
38 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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* The module implements a robust original algorithm design, which I later
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* found to be probably related to the one described in
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*
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* A. Wishnick, "Time-Varying Filters for Musical Applications", Proc. 17th
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* Intl. Conf. Digital Audio Effects (DAFx-14), Erlangen, Germany, September
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* 2014.
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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>Changed model to get positive polarity at the bandpass
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* output.</li>
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* <li>Limited actual prewarping frequency to prevent instability.</li>
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* <li>Now using relative sticky threshold for smoothing all
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* "continuous" parameters.</li>
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* <li>Added <code>bw_svf_reset_state_multi()</code> and updated C++
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* API in this regard.</li>
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* <li>Now <code>bw_svf_reset_state()</code> returns the initial output
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* values.</li>
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* <li>Added overloaded C++ <code>reset()</code> functions taking
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* arrays as arguments.</li>
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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 overloaded 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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* <li>Fixed theoretical bug in <code>bw_svf_init()</code>.</li>
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* <li>Clearly specified parameter validity ranges.</li>
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* <li>Added debugging code.</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(
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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(
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bw_svf_coeffs * BW_RESTRICT coeffs,
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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(
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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(
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const bw_svf_coeffs * BW_RESTRICT coeffs,
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bw_svf_state * BW_RESTRICT state,
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float x_0,
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float * BW_RESTRICT y_lp_0,
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float * BW_RESTRICT y_bp_0,
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float * BW_RESTRICT y_hp_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 initial input value `x_0`.
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*
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* The corresponding initial lowpass, bandpass, and highpass output values
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* are put into `y_lp_0`, `y_bp_0`, and `y_hp_0` respectively.
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*
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* #### bw_svf_reset_state_multi()
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* ```>>> */
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static inline void bw_svf_reset_state_multi(
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const bw_svf_coeffs * BW_RESTRICT coeffs,
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bw_svf_state * BW_RESTRICT const * BW_RESTRICT state,
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const float * x_0,
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float * y_lp_0,
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float * y_bp_0,
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float * y_hp_0,
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size_t n_channels);
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/*! <<<```
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* Resets each of the `n_channels` `state`s to its initial values using the
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* given `coeffs` and the corresponding initial input value in the `x_0`
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* array.
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*
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* The corresponding initial lowpass, bandpass, and highpass output values
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* are put into `y_lp_0`, `y_bp_0`, and `y_hp_0` respectively, if they are
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* not `NULL`.
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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(
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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(
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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(
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const bw_svf_coeffs * BW_RESTRICT coeffs,
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bw_svf_state * BW_RESTRICT state,
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float x,
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float * BW_RESTRICT y_lp,
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float * BW_RESTRICT y_bp,
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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(
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bw_svf_coeffs * BW_RESTRICT coeffs,
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bw_svf_state * BW_RESTRICT state,
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const float * x,
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float * y_lp,
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float * y_bp,
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float * y_hp,
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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(
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bw_svf_coeffs * BW_RESTRICT coeffs,
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bw_svf_state * BW_RESTRICT const * BW_RESTRICT state,
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const float * const * x,
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float * const * y_lp,
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float * const * y_bp,
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float * const * y_hp,
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size_t n_channels,
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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(
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bw_svf_coeffs * BW_RESTRICT coeffs,
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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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* Valid range: [`1e-6f`, `1e12f`].
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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(
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bw_svf_coeffs * BW_RESTRICT coeffs,
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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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* Valid range: [`1e-6f`, `1e6f`].
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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(
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bw_svf_coeffs * BW_RESTRICT coeffs,
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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(
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bw_svf_coeffs * BW_RESTRICT coeffs,
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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 and however
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* internally limited to avoid instability.
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*
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* Valid range: [`1e-6f`, `1e12f`].
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*
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* Default value: `1e3f`.
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*
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* #### bw_svf_coeffs_is_valid()
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* ```>>> */
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static inline char bw_svf_coeffs_is_valid(
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const bw_svf_coeffs * BW_RESTRICT coeffs);
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/*! <<<```
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* Tries to determine whether `coeffs` is valid and returns non-`0` if it
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* seems to be the case and `0` if it is certainly not. False positives are
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* possible, false negatives are not.
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*
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* `coeffs` must at least point to a readable memory block of size greater
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* than or equal to that of `bw_svf_coeffs`.
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*
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* #### bw_svf_state_is_valid()
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* ```>>> */
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static inline char bw_svf_state_is_valid(
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const bw_svf_coeffs * BW_RESTRICT coeffs,
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const bw_svf_state * BW_RESTRICT state);
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/*! <<<```
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* Tries to determine whether `state` is valid and returns non-`0` if it
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* seems to be the case and `0` if it is certainly not. False positives are
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* possible, false negatives are not.
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*
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* If `coeffs` is not `NULL` extra cross-checks might be performed (`state`
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* is supposed to be associated to `coeffs`).
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*
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* `state` must at least point to a readable memory block of size greater
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* than or equal to that of `bw_svf_state`.
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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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#ifdef BW_DEBUG_DEEP
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enum bw_svf_coeffs_state {
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bw_svf_coeffs_state_invalid,
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bw_svf_coeffs_state_init,
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bw_svf_coeffs_state_set_sample_rate,
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bw_svf_coeffs_state_reset_coeffs
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};
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#endif
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struct bw_svf_coeffs {
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#ifdef BW_DEBUG_DEEP
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uint32_t hash;
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enum bw_svf_coeffs_state state;
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uint32_t reset_id;
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#endif
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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_freq_max;
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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_k;
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float prewarp_freq;
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};
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struct bw_svf_state {
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#ifdef BW_DEBUG_DEEP
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uint32_t hash;
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uint32_t coeffs_reset_id;
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#endif
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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(
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bw_svf_coeffs * BW_RESTRICT coeffs) {
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BW_ASSERT(coeffs != NULL);
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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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bw_one_pole_set_sticky_mode(&coeffs->smooth_coeffs, bw_one_pole_sticky_mode_rel);
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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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#ifdef BW_DEBUG_DEEP
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coeffs->hash = bw_hash_sdbm("bw_svf_coeffs");
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coeffs->state = bw_svf_coeffs_state_init;
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coeffs->reset_id = coeffs->hash + 1;
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#endif
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BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state == bw_svf_coeffs_state_init);
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}
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static inline void bw_svf_set_sample_rate(
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bw_svf_coeffs * BW_RESTRICT coeffs,
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float sample_rate) {
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BW_ASSERT(coeffs != NULL);
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BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_init);
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BW_ASSERT(bw_is_finite(sample_rate) && sample_rate > 0.f);
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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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coeffs->prewarp_freq_max = 0.499f * sample_rate;
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#ifdef BW_DEBUG_DEEP
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coeffs->state = bw_svf_coeffs_state_set_sample_rate;
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#endif
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BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state == bw_svf_coeffs_state_set_sample_rate);
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}
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static inline void bw_svf_do_update_coeffs(
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bw_svf_coeffs * BW_RESTRICT coeffs,
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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);
|
|
const char cutoff_changed = force || coeffs->cutoff != cutoff_cur;
|
|
const char prewarp_freq_changed = force || prewarp_freq != prewarp_freq_cur;
|
|
const char Q_changed = force || coeffs->Q != Q_cur;
|
|
if (cutoff_changed || prewarp_freq_changed || Q_changed) {
|
|
if (cutoff_changed || prewarp_freq_changed) {
|
|
if (cutoff_changed)
|
|
cutoff_cur = bw_one_pole_process1_sticky_rel(&coeffs->smooth_coeffs, &coeffs->smooth_cutoff_state, coeffs->cutoff);
|
|
if (prewarp_freq_changed) {
|
|
prewarp_freq_cur = bw_one_pole_process1_sticky_rel(&coeffs->smooth_coeffs, &coeffs->smooth_prewarp_freq_state, prewarp_freq);
|
|
const float f = bw_minf(prewarp_freq_cur, coeffs->prewarp_freq_max);
|
|
coeffs->t = bw_tanf(coeffs->t_k * f);
|
|
coeffs->kf = coeffs->t * bw_rcpf(f);
|
|
}
|
|
coeffs->kbl = coeffs->kf * cutoff_cur;
|
|
}
|
|
if (Q_changed) {
|
|
Q_cur = bw_one_pole_process1_sticky_rel(&coeffs->smooth_coeffs, &coeffs->smooth_Q_state, coeffs->Q);
|
|
coeffs->k = bw_rcpf(Q_cur);
|
|
}
|
|
coeffs->hp_hb = coeffs->k + coeffs->kbl;
|
|
coeffs->hp_x = bw_rcpf(1.f + coeffs->kbl * coeffs->hp_hb);
|
|
}
|
|
}
|
|
|
|
static inline void bw_svf_reset_coeffs(
|
|
bw_svf_coeffs * BW_RESTRICT coeffs) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_set_sample_rate);
|
|
|
|
bw_one_pole_reset_state(&coeffs->smooth_coeffs, &coeffs->smooth_cutoff_state, coeffs->cutoff);
|
|
bw_one_pole_reset_state(&coeffs->smooth_coeffs, &coeffs->smooth_Q_state, coeffs->Q);
|
|
bw_one_pole_reset_state(&coeffs->smooth_coeffs, &coeffs->smooth_prewarp_freq_state, coeffs->prewarp_freq + coeffs->prewarp_k * (coeffs->cutoff - coeffs->prewarp_freq));
|
|
bw_svf_do_update_coeffs(coeffs, 1);
|
|
|
|
#ifdef BW_DEBUG_DEEP
|
|
coeffs->state = bw_svf_coeffs_state_reset_coeffs;
|
|
coeffs->reset_id++;
|
|
#endif
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state == bw_svf_coeffs_state_reset_coeffs);
|
|
}
|
|
|
|
static inline void bw_svf_reset_state(
|
|
const bw_svf_coeffs * BW_RESTRICT coeffs,
|
|
bw_svf_state * BW_RESTRICT state,
|
|
float x_0,
|
|
float * BW_RESTRICT y_lp_0,
|
|
float * BW_RESTRICT y_bp_0,
|
|
float * BW_RESTRICT y_hp_0) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
BW_ASSERT(state != NULL);
|
|
BW_ASSERT(bw_is_finite(x_0));
|
|
BW_ASSERT(y_lp_0 != NULL);
|
|
BW_ASSERT(y_bp_0 != NULL);
|
|
BW_ASSERT(y_hp_0 != NULL);
|
|
|
|
state->hp_z1 = 0.f;
|
|
state->lp_z1 = x_0;
|
|
state->bp_z1 = 0.f;
|
|
state->cutoff_z1 = coeffs->cutoff;
|
|
*y_lp_0 = x_0;
|
|
*y_bp_0 = 0.f;
|
|
*y_hp_0 = 0.f;
|
|
|
|
#ifdef BW_DEBUG_DEEP
|
|
state->hash = bw_hash_sdbm("bw_svf_state");
|
|
state->coeffs_reset_id = coeffs->reset_id;
|
|
#endif
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
BW_ASSERT_DEEP(bw_svf_state_is_valid(coeffs, state));
|
|
BW_ASSERT(bw_is_finite(*y_lp_0));
|
|
BW_ASSERT(bw_is_finite(*y_bp_0));
|
|
BW_ASSERT(bw_is_finite(*y_hp_0));
|
|
}
|
|
|
|
static inline void bw_svf_reset_state_multi(
|
|
const bw_svf_coeffs * BW_RESTRICT coeffs,
|
|
bw_svf_state * BW_RESTRICT const * BW_RESTRICT state,
|
|
const float * x_0,
|
|
float * y_lp_0,
|
|
float * y_bp_0,
|
|
float * y_hp_0,
|
|
size_t n_channels) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
BW_ASSERT(state != NULL);
|
|
BW_ASSERT(x_0 != NULL);
|
|
|
|
if (y_lp_0 != NULL) {
|
|
if (y_bp_0 != NULL) {
|
|
if (y_hp_0 != NULL) {
|
|
for (size_t i = 0; i < n_channels; i++)
|
|
bw_svf_reset_state(coeffs, state[i], x_0[i], y_lp_0 + i, y_bp_0 + i, y_hp_0 + i);
|
|
} else {
|
|
for (size_t i = 0; i < n_channels; i++) {
|
|
float v_hp;
|
|
bw_svf_reset_state(coeffs, state[i], x_0[i], y_lp_0 + i, y_bp_0 + i, &v_hp);
|
|
}
|
|
}
|
|
} else {
|
|
if (y_hp_0 != NULL) {
|
|
for (size_t i = 0; i < n_channels; i++) {
|
|
float v_bp;
|
|
bw_svf_reset_state(coeffs, state[i], x_0[i], y_lp_0 + i, &v_bp, y_hp_0 + i);
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < n_channels; i++) {
|
|
float v_bp, v_hp;
|
|
bw_svf_reset_state(coeffs, state[i], x_0[i], y_lp_0 + i, &v_bp, &v_hp);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (y_bp_0 != NULL) {
|
|
if (y_hp_0 != NULL) {
|
|
for (size_t i = 0; i < n_channels; i++) {
|
|
float v_lp;
|
|
bw_svf_reset_state(coeffs, state[i], x_0[i], &v_lp, y_bp_0 + i, y_hp_0 + i);
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < n_channels; i++) {
|
|
float v_lp, v_hp;
|
|
bw_svf_reset_state(coeffs, state[i], x_0[i], &v_lp, y_bp_0 + i, &v_hp);
|
|
}
|
|
}
|
|
} else {
|
|
if (y_hp_0 != NULL) {
|
|
for (size_t i = 0; i < n_channels; i++) {
|
|
float v_lp, v_bp;
|
|
bw_svf_reset_state(coeffs, state[i], x_0[i], &v_lp, &v_bp, y_hp_0 + i);
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < n_channels; i++) {
|
|
float v_lp, v_bp, v_hp;
|
|
bw_svf_reset_state(coeffs, state[i], x_0[i], &v_lp, &v_bp, &v_hp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
BW_ASSERT_DEEP(y_lp_0 != NULL ? bw_has_only_finite(y_lp_0, n_channels) : 1);
|
|
BW_ASSERT_DEEP(y_bp_0 != NULL ? bw_has_only_finite(y_bp_0, n_channels) : 1);
|
|
BW_ASSERT_DEEP(y_hp_0 != NULL ? bw_has_only_finite(y_hp_0, n_channels) : 1);
|
|
}
|
|
|
|
static inline void bw_svf_update_coeffs_ctrl(
|
|
bw_svf_coeffs * BW_RESTRICT coeffs) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
|
|
(void)coeffs;
|
|
}
|
|
|
|
static inline void bw_svf_update_coeffs_audio(
|
|
bw_svf_coeffs * BW_RESTRICT coeffs) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
|
|
bw_svf_do_update_coeffs(coeffs, 0);
|
|
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
}
|
|
|
|
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) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
BW_ASSERT(state != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_state_is_valid(coeffs, state));
|
|
BW_ASSERT(bw_is_finite(x));
|
|
BW_ASSERT(y_lp != NULL);
|
|
BW_ASSERT(y_bp != NULL);
|
|
BW_ASSERT(y_hp != NULL);
|
|
|
|
const float kk = coeffs->kf * state->cutoff_z1;
|
|
const float lp_xz1 = state->lp_z1 + kk * state->bp_z1;
|
|
const float bp_xz1 = state->bp_z1 + kk * state->hp_z1;
|
|
*y_hp = coeffs->hp_x * (x - coeffs->hp_hb * bp_xz1 - lp_xz1);
|
|
*y_bp = bp_xz1 + coeffs->kbl * *y_hp;
|
|
*y_lp = lp_xz1 + coeffs->kbl * *y_bp;
|
|
state->hp_z1 = *y_hp;
|
|
state->lp_z1 = *y_lp;
|
|
state->bp_z1 = *y_bp;
|
|
state->cutoff_z1 = bw_one_pole_get_y_z1(&coeffs->smooth_cutoff_state);
|
|
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
BW_ASSERT_DEEP(bw_svf_state_is_valid(coeffs, state));
|
|
BW_ASSERT(bw_is_finite(*y_lp));
|
|
BW_ASSERT(bw_is_finite(*y_bp));
|
|
BW_ASSERT(bw_is_finite(*y_hp));
|
|
}
|
|
|
|
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) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
BW_ASSERT(state != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_state_is_valid(coeffs, state));
|
|
BW_ASSERT(x != NULL);
|
|
BW_ASSERT_DEEP(bw_has_only_finite(x, 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);
|
|
bw_svf_process1(coeffs, state, x[i], y_lp + i, y_bp + i, y_hp + i);
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
float v_hp;
|
|
bw_svf_process1(coeffs, state, x[i], y_lp + i, y_bp + i, &v_hp);
|
|
}
|
|
}
|
|
} else {
|
|
if (y_hp != NULL) {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
float v_bp;
|
|
bw_svf_process1(coeffs, state, x[i], y_lp + i, &v_bp, y_hp + i);
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
float v_bp, v_hp;
|
|
bw_svf_process1(coeffs, state, x[i], y_lp + i, &v_bp, &v_hp);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (y_bp != NULL) {
|
|
if (y_hp != NULL) {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
float v_lp;
|
|
bw_svf_process1(coeffs, state, x[i], &v_lp, y_bp + i, y_hp + i);
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
float v_lp, v_hp;
|
|
bw_svf_process1(coeffs, state, x[i], &v_lp, y_bp + i, &v_hp);
|
|
}
|
|
}
|
|
} else {
|
|
if (y_hp != NULL) {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_svf_update_coeffs_audio(coeffs);
|
|
float v_lp, v_bp;
|
|
bw_svf_process1(coeffs, state, x[i], &v_lp, &v_bp, y_hp + i);
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
BW_ASSERT_DEEP(bw_svf_state_is_valid(coeffs, state));
|
|
BW_ASSERT_DEEP(y_lp != NULL ? bw_has_only_finite(y_lp, n_samples) : 1);
|
|
BW_ASSERT_DEEP(y_bp != NULL ? bw_has_only_finite(y_bp, n_samples) : 1);
|
|
BW_ASSERT_DEEP(y_hp != NULL ? bw_has_only_finite(y_hp, n_samples) : 1);
|
|
}
|
|
|
|
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) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
BW_ASSERT(state != NULL);
|
|
BW_ASSERT(x != NULL);
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_reset_coeffs);
|
|
}
|
|
|
|
static inline void bw_svf_set_cutoff(
|
|
bw_svf_coeffs * BW_RESTRICT coeffs,
|
|
float value) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_init);
|
|
BW_ASSERT(bw_is_finite(value));
|
|
BW_ASSERT(value >= 1e-6f && value <= 1e12f);
|
|
|
|
coeffs->cutoff = value;
|
|
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_init);
|
|
}
|
|
|
|
static inline void bw_svf_set_Q(
|
|
bw_svf_coeffs * BW_RESTRICT coeffs,
|
|
float value) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_init);
|
|
BW_ASSERT(bw_is_finite(value));
|
|
BW_ASSERT(value >= 1e-6f && value <= 1e6f);
|
|
|
|
coeffs->Q = value;
|
|
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_init);
|
|
}
|
|
|
|
static inline void bw_svf_set_prewarp_at_cutoff(
|
|
bw_svf_coeffs * BW_RESTRICT coeffs,
|
|
char value) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_init);
|
|
|
|
coeffs->prewarp_k = value ? 1.f : 0.f;
|
|
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_init);
|
|
}
|
|
|
|
static inline void bw_svf_set_prewarp_freq(
|
|
bw_svf_coeffs * BW_RESTRICT coeffs,
|
|
float value) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_init);
|
|
BW_ASSERT(bw_is_finite(value));
|
|
BW_ASSERT(value >= 1e-6f && value <= 1e12f);
|
|
|
|
coeffs->prewarp_freq = value;
|
|
|
|
BW_ASSERT_DEEP(bw_svf_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_svf_coeffs_state_init);
|
|
}
|
|
|
|
static inline char bw_svf_coeffs_is_valid(
|
|
const bw_svf_coeffs * BW_RESTRICT coeffs) {
|
|
BW_ASSERT(coeffs != NULL);
|
|
|
|
#ifdef BW_DEBUG_DEEP
|
|
if (coeffs->hash != bw_hash_sdbm("bw_svf_coeffs"))
|
|
return 0;
|
|
if (coeffs->state < bw_svf_coeffs_state_init || coeffs->state > bw_svf_coeffs_state_reset_coeffs)
|
|
return 0;
|
|
#endif
|
|
|
|
if (coeffs->cutoff < 1e-6f || coeffs->cutoff > 1e12f)
|
|
return 0;
|
|
if (coeffs->Q < 1e-6f || coeffs->Q > 1e6f)
|
|
return 0;
|
|
if (coeffs->prewarp_k != 0.f && coeffs->prewarp_k != 1.f)
|
|
return 0;
|
|
if (coeffs->prewarp_freq < 1e-6f || coeffs->prewarp_freq > 1e12f)
|
|
return 0;
|
|
|
|
if (!bw_one_pole_coeffs_is_valid(&coeffs->smooth_coeffs))
|
|
return 0;
|
|
|
|
#ifdef BW_DEBUG_DEEP
|
|
if (coeffs->state >= bw_svf_coeffs_state_set_sample_rate) {
|
|
if (!bw_is_finite(coeffs->t_k) || coeffs->t_k <= 0.f)
|
|
return 0;
|
|
if (!bw_is_finite(coeffs->prewarp_freq_max) || coeffs->prewarp_freq_max <= 0.f)
|
|
return 0;
|
|
}
|
|
|
|
if (coeffs->state >= bw_svf_coeffs_state_reset_coeffs) {
|
|
if (!bw_is_finite(coeffs->t) || coeffs->t <= 0.f)
|
|
return 0;
|
|
if (!bw_is_finite(coeffs->kf) || coeffs->kf <= 0.f)
|
|
return 0;
|
|
if (!bw_is_finite(coeffs->kbl) || coeffs->kbl <= 0.f)
|
|
return 0;
|
|
if (!bw_is_finite(coeffs->k) || coeffs->k <= 0.f)
|
|
return 0;
|
|
if (!bw_is_finite(coeffs->hp_hb) || coeffs->hp_hb <= 0.f)
|
|
return 0;
|
|
if (!bw_is_finite(coeffs->hp_x) || coeffs->hp_x <= 0.f || coeffs->hp_x >= 1.f)
|
|
return 0;
|
|
|
|
if (!bw_one_pole_state_is_valid(&coeffs->smooth_coeffs, &coeffs->smooth_cutoff_state))
|
|
return 0;
|
|
if (!bw_one_pole_state_is_valid(&coeffs->smooth_coeffs, &coeffs->smooth_Q_state))
|
|
return 0;
|
|
if (!bw_one_pole_state_is_valid(&coeffs->smooth_coeffs, &coeffs->smooth_prewarp_freq_state))
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
return 1;
|
|
}
|
|
|
|
static inline char bw_svf_state_is_valid(
|
|
const bw_svf_coeffs * BW_RESTRICT coeffs,
|
|
const bw_svf_state * BW_RESTRICT state) {
|
|
BW_ASSERT(state != NULL);
|
|
|
|
#ifdef BW_DEBUG_DEEP
|
|
if (state->hash != bw_hash_sdbm("bw_svf_state"))
|
|
return 0;
|
|
|
|
if (coeffs != NULL && coeffs->reset_id != state->coeffs_reset_id)
|
|
return 0;
|
|
#endif
|
|
|
|
(void)coeffs;
|
|
|
|
if (!bw_is_finite(state->hp_z1))
|
|
return 0;
|
|
if (!bw_is_finite(state->lp_z1))
|
|
return 0;
|
|
if (!bw_is_finite(state->bp_z1))
|
|
return 0;
|
|
if (!bw_is_finite(state->cutoff_z1) || state->cutoff_z1 < 1e-6f || state->cutoff_z1 > 1e12f)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
#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 x0 = 0.f,
|
|
float * BW_RESTRICT yLp0 = nullptr,
|
|
float * BW_RESTRICT yBp0 = nullptr,
|
|
float * BW_RESTRICT yHp0 = nullptr);
|
|
|
|
void reset(
|
|
float x0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT yLp0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT yBp0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT yHp0);
|
|
|
|
void reset(
|
|
const float * x0,
|
|
float * yLp0 = nullptr,
|
|
float * yBp0 = nullptr,
|
|
float * yHp0 = nullptr);
|
|
|
|
void reset(
|
|
std::array<float, N_CHANNELS> x0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT yLp0 = nullptr,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT yBp0 = nullptr,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT yHp0 = nullptr);
|
|
|
|
void process(
|
|
const float * const * x,
|
|
float * const * yLp,
|
|
float * const * yBp,
|
|
float * const * yHp,
|
|
size_t nSamples);
|
|
|
|
void process(
|
|
std::array<const float *, N_CHANNELS> x,
|
|
std::array<float *, N_CHANNELS> yLp,
|
|
std::array<float *, N_CHANNELS> yBp,
|
|
std::array<float *, N_CHANNELS> yHp,
|
|
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 x0,
|
|
float * BW_RESTRICT yLp0,
|
|
float * BW_RESTRICT yBp0,
|
|
float * BW_RESTRICT yHp0) {
|
|
bw_svf_reset_coeffs(&coeffs);
|
|
if (yLp0 != nullptr) {
|
|
if (yBp0 != nullptr) {
|
|
if (yHp0 != nullptr) {
|
|
for (size_t i = 0; i < N_CHANNELS; i++)
|
|
bw_svf_reset_state(&coeffs, states + i, x0, yLp0 + i, yBp0 + i, yHp0 + i);
|
|
} else {
|
|
for (size_t i = 0; i < N_CHANNELS; i++) {
|
|
float vHp;
|
|
bw_svf_reset_state(&coeffs, states + i, x0, yLp0 + i, yBp0 + i, &vHp);
|
|
}
|
|
}
|
|
} else {
|
|
if (yHp0 != nullptr) {
|
|
for (size_t i = 0; i < N_CHANNELS; i++) {
|
|
float vBp;
|
|
bw_svf_reset_state(&coeffs, states + i, x0, yLp0 + i, &vBp, yHp0 + i);
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < N_CHANNELS; i++) {
|
|
float vBp, vHp;
|
|
bw_svf_reset_state(&coeffs, states + i, x0, yLp0 + i, &vBp, &vHp);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (yBp0 != nullptr) {
|
|
if (yHp0 != nullptr) {
|
|
for (size_t i = 0; i < N_CHANNELS; i++) {
|
|
float vLp;
|
|
bw_svf_reset_state(&coeffs, states + i, x0, &vLp, yBp0 + i, yHp0 + i);
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < N_CHANNELS; i++) {
|
|
float vLp, vHp;
|
|
bw_svf_reset_state(&coeffs, states + i, x0, &vLp, yBp0 + i, &vHp);
|
|
}
|
|
}
|
|
} else {
|
|
if (yHp0 != nullptr) {
|
|
for (size_t i = 0; i < N_CHANNELS; i++) {
|
|
float vLp, vBp;
|
|
bw_svf_reset_state(&coeffs, states + i, x0, &vLp, &vBp, yHp0 + i);
|
|
}
|
|
} else {
|
|
for (size_t i = 0; i < N_CHANNELS; i++) {
|
|
float vLp, vBp, vHp;
|
|
bw_svf_reset_state(&coeffs, states + i, x0, &vLp, &vBp, &vHp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void SVF<N_CHANNELS>::reset(
|
|
float x0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT yLp0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT yBp0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT yHp0) {
|
|
reset(x0, yLp0 != nullptr ? yLp0->data() : nullptr, yBp0 != nullptr ? yBp0->data() : nullptr, yHp0 != nullptr ? yHp0->data() : nullptr);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void SVF<N_CHANNELS>::reset(
|
|
const float * x0,
|
|
float * yLp0,
|
|
float * yBp0,
|
|
float * yHp0) {
|
|
bw_svf_reset_coeffs(&coeffs);
|
|
bw_svf_reset_state_multi(&coeffs, statesP, x0, yLp0, yBp0, yHp0, N_CHANNELS);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void SVF<N_CHANNELS>::reset(
|
|
std::array<float, N_CHANNELS> x0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT yLp0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT yBp0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT yHp0) {
|
|
reset(x0.data(), yLp0 != nullptr ? yLp0->data() : nullptr, yBp0 != nullptr ? yBp0->data() : nullptr, yHp0 != nullptr ? yHp0->data() : nullptr);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void SVF<N_CHANNELS>::process(
|
|
const float * const * x,
|
|
float * const * yLp,
|
|
float * const * yBp,
|
|
float * const * yHp,
|
|
size_t nSamples) {
|
|
bw_svf_process_multi(&coeffs, statesP, x, yLp, yBp, yHp, 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> yLp,
|
|
std::array<float *, N_CHANNELS> yBp,
|
|
std::array<float *, N_CHANNELS> yHp,
|
|
size_t nSamples) {
|
|
process(x.data(), yLp.data(), yBp.data(), yHp.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
|