673 lines
21 KiB
C++
673 lines
21 KiB
C++
/*
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* Brickworks
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*
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* Copyright (C) 2022-2024 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 {{{ 1.1.1 }}}
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* requires {{{ bw_common bw_math bw_one_pole }}}
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* description {{{
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* Pulse oscillator waveshaper with variable pulse width (actually, duty
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* cycle) and PolyBLEP antialiasing.
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*
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* It turns a normalized phase signal, such as that geneated by
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* [bw\_phase\_gen](bw_phase_gen), into a pulse wave.
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*
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* The antialiasing algorithm is based on
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*
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* V. Valimaki and A. Huovilainen, "Antialiasing Oscillators in Subtractive
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* Synthesis", IEEE Signal Processing Magazine, vol. 24, no. 2, pp. 116-125,
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* March 2007.
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* }}}
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* changelog {{{
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* <ul>
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* <li>Version <strong>1.1.1</strong>:
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* <ul>
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* <li>Added debugging checks in
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* <code>bw_osc_pulse_process_multi()</code> to ensure that
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* <code>x_inc</code> is not <code>BW_NULL</code> when antialiasing
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* is on and that buffers used for both input and output appear at
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* the same channel indices.</li>
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* <li>Added extra checks in
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* <code>bw_osc_pulse_coeffs_is_valid()</code>.</li>
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* <li>Changed the name of C++ arguments to camel case.</li>
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* </ul>
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* </li>
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* <li>Version <strong>1.1.0</strong>:
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* <ul>
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* <li>Now using <code>BW_NULL</code> and
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* <code>BW_CXX_NO_ARRAY</code>.</li>
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* </ul>
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* </li>
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* <li>Version <strong>1.0.0</strong>:
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* <ul>
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* <li><code>bw_osc_pulse_process()</code> and
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* <code>bw_osc_pulse_process_multi()</code> now use
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* <code>size_t</code> to count samples and channels.</li>
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* <li>Added more <code>const</code> specifiers to input
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* arguments.</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>Now antialiasing should work also with negative input
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* increments.</li>
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* <li>Removed usage of reserved identifiers.</li>
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* <li>Clearly specified validity ranges for audio-rate signals.</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_osc_pulse_process_multi()</code>.</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>Fixed unused parameter warnings.</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_OSC_PULSE_H
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#define BW_OSC_PULSE_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_osc_pulse_coeffs
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* ```>>> */
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typedef struct bw_osc_pulse_coeffs bw_osc_pulse_coeffs;
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/*! <<<```
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* Coefficients and related.
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*
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* #### bw_osc_pulse_init()
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* ```>>> */
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static inline void bw_osc_pulse_init(
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bw_osc_pulse_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_osc_pulse_set_sample_rate()
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* ```>>> */
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static inline void bw_osc_pulse_set_sample_rate(
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bw_osc_pulse_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_osc_pulse_reset_coeffs()
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* ```>>> */
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static inline void bw_osc_pulse_reset_coeffs(
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bw_osc_pulse_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_osc_pulse_update_coeffs_ctrl()
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* ```>>> */
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static inline void bw_osc_pulse_update_coeffs_ctrl(
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bw_osc_pulse_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_osc_pulse_update_coeffs_audio()
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* ```>>> */
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static inline void bw_osc_pulse_update_coeffs_audio(
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bw_osc_pulse_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_osc_pulse_process1\*()
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* ```>>> */
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static inline float bw_osc_pulse_process1(
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const bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
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float x);
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static inline float bw_osc_pulse_process1_antialias(
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const bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
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float x,
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float x_inc);
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/*! <<<```
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* These function process one input sample `x`, representing the normalized
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* phase, using `coeffs`. They return the corresponding output sample.
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*
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* In particular:
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* * `bw_osc_pulse_process1()` assumes that antialiasing is disabled;
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* * `bw_osc_pulse_process1_antialias()` assumes that antialiasing is
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* enabled and requires the corresponding phase increment value to be
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* passed via `x_inc`.
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*
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* Whether antialiasing is enabled or not is unchecked even for debugging
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* purposes.
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*
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* `x` must be in [`0.f`, `1.f`).
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*
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* `x_inc` must be in [`-0.5f`, `0.5f`].
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*
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* #### bw_osc_pulse_process()
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* ```>>> */
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static inline void bw_osc_pulse_process(
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bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
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const float * x,
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const float * x_inc,
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float * y,
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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`, containing the
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* normalized phase signal, and fills the first `n_samples` of the output
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* buffer `y`, while using and updating `coeffs` (control and audio rate).
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*
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* If antialiasing is enabled, `x_inc` must contain phase increment
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* values, otherwise it is ignored and can be `BW_NULL`.
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*
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* All samples in `x` must be in [`0.f`, `1.f`).
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*
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* All samples is `x_inc`, if not ignored, must be in [`-0.5f`, `0.5f`].
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*
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* #### bw_osc_pulse_process_multi()
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* ```>>> */
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static inline void bw_osc_pulse_process_multi(
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bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
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const float * const * x,
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const float * const * x_inc,
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float * const * y,
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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`,
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* containing the normalized phase signals, and fills the first `n_samples`
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* of the `n_channels` output buffers `y`, while using and updating the
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* common `coeffs` (control and audio rate).
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*
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* If antialiasing is enabled, each of the `n_channels` buffers pointed by
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* `x_inc` must contain phase increment values, otherwise `x_inc` is ignored
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* and can be `BW_NULL`.
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*
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* All samples in `x` must be in [`0.f`, `1.f`).
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*
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* All samples is `x_inc`, if not ignored, must be in [`-0.5f`, `0.5f`].
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*
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* #### bw_osc_pulse_set_antialiasing()
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* ```>>> */
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static inline void bw_osc_pulse_set_antialiasing(
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bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
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char value);
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/*! <<<```
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* Sets whether the antialiasing is on (`value` non-`0`) or off (`0`) in
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* `coeffs`.
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*
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* Default value: `0` (off).
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*
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* #### bw_osc_pulse_set_pulse_width()
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* ```>>> */
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static inline void bw_osc_pulse_set_pulse_width(
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bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
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float value);
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/*! <<<```
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* Sets the pulse width (actually, the duty cycle) to `value` in `coeffs`.
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*
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* Valid range: [`0.f` (0% duty cycle), `1.f` (100% duty cycle)].
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*
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* Default value: `0.5f`.
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*
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* #### bw_osc_pulse_coeffs_is_valid()
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* ```>>> */
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static inline char bw_osc_pulse_coeffs_is_valid(
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const bw_osc_pulse_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_osc_pulse_coeffs`.
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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_osc_pulse_coeffs_state {
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bw_osc_pulse_coeffs_state_invalid,
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bw_osc_pulse_coeffs_state_init,
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bw_osc_pulse_coeffs_state_set_sample_rate,
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bw_osc_pulse_coeffs_state_reset_coeffs
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};
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#endif
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struct bw_osc_pulse_coeffs {
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#ifdef BW_DEBUG_DEEP
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uint32_t hash;
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enum bw_osc_pulse_coeffs_state state;
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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_state;
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// Parameters
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char antialiasing;
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float pulse_width;
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};
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static inline void bw_osc_pulse_init(
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bw_osc_pulse_coeffs * BW_RESTRICT coeffs) {
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BW_ASSERT(coeffs != BW_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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coeffs->antialiasing = 0;
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coeffs->pulse_width = 0.5f;
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#ifdef BW_DEBUG_DEEP
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coeffs->hash = bw_hash_sdbm("bw_osc_pulse_coeffs");
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coeffs->state = bw_osc_pulse_coeffs_state_init;
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#endif
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BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state == bw_osc_pulse_coeffs_state_init);
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}
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static inline void bw_osc_pulse_set_sample_rate(
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bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
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float sample_rate) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_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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#ifdef BW_DEBUG_DEEP
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coeffs->state = bw_osc_pulse_coeffs_state_set_sample_rate;
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#endif
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BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state == bw_osc_pulse_coeffs_state_set_sample_rate);
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}
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static inline void bw_osc_pulse_reset_coeffs(
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bw_osc_pulse_coeffs * BW_RESTRICT coeffs) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_set_sample_rate);
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bw_one_pole_reset_state(&coeffs->smooth_coeffs, &coeffs->smooth_state, coeffs->pulse_width);
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#ifdef BW_DEBUG_DEEP
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coeffs->state = bw_osc_pulse_coeffs_state_reset_coeffs;
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#endif
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BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state == bw_osc_pulse_coeffs_state_reset_coeffs);
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}
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static inline void bw_osc_pulse_update_coeffs_ctrl(
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bw_osc_pulse_coeffs * BW_RESTRICT coeffs) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_reset_coeffs);
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(void)coeffs;
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}
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static inline void bw_osc_pulse_update_coeffs_audio(
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bw_osc_pulse_coeffs * BW_RESTRICT coeffs) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_reset_coeffs);
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bw_one_pole_process1(&coeffs->smooth_coeffs, &coeffs->smooth_state, coeffs->pulse_width);
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BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_reset_coeffs);
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}
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static inline float bw_osc_pulse_process1(
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const bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
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float x) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_reset_coeffs);
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BW_ASSERT(bw_is_finite(x));
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BW_ASSERT(x >= 0.f && x < 1.f);
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const float pw = bw_one_pole_get_y_z1(&coeffs->smooth_state);
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const float y = bw_signf(pw - x);
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BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_reset_coeffs);
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BW_ASSERT(bw_is_finite(y));
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return y;
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}
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// PolyBLEP residual based on Parzen window (4th-order B-spline), one-sided (x in [0, 2])
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static inline float bw_osc_pulse_blep_diff(
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float x) {
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return x < 1.f
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? x * ((0.25f * x - 0.6666666666666666f) * x * x + 1.333333333333333f) - 1.f
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: x * (x * ((0.6666666666666666f - 0.08333333333333333f * x) * x - 2.f) + 2.666666666666667f) - 1.333333333333333f;
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}
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static inline float bw_osc_pulse_process1_antialias(
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const bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
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float x,
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float x_inc) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_reset_coeffs);
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BW_ASSERT(bw_is_finite(x));
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BW_ASSERT(x >= 0.f && x < 1.f);
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BW_ASSERT(bw_is_finite(x_inc));
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BW_ASSERT(x_inc >= -0.5f && x_inc <= 0.5f);
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const float pw = bw_one_pole_get_y_z1(&coeffs->smooth_state);
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const float pw_m_phase = pw - x;
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float v = bw_copysignf(1.f, pw_m_phase); // pw = phase case should be properly compensated by the AA
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const float a_inc = bw_absf(x_inc);
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if (a_inc > 1e-6f) {
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const float phase_inc_2 = a_inc + a_inc;
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const float phase_inc_rcp = bw_rcpf(a_inc);
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const float phase_2 = 0.5f * v + 0.5f - pw_m_phase;
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const float s_1_m_phase = 1.f - x;
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const float s_1_m_phase_2 = 1.f - phase_2;
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if (s_1_m_phase < phase_inc_2)
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v -= bw_osc_pulse_blep_diff(s_1_m_phase * phase_inc_rcp);
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if (s_1_m_phase_2 < phase_inc_2)
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v += bw_osc_pulse_blep_diff(s_1_m_phase_2 * phase_inc_rcp);
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if (x < phase_inc_2)
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v += bw_osc_pulse_blep_diff(x * phase_inc_rcp);
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if (phase_2 < phase_inc_2)
|
|
v -= bw_osc_pulse_blep_diff(phase_2 * phase_inc_rcp);
|
|
}
|
|
|
|
BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_reset_coeffs);
|
|
BW_ASSERT(bw_is_finite(v));
|
|
|
|
return v;
|
|
}
|
|
|
|
static inline void bw_osc_pulse_process(
|
|
bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
|
|
const float * x,
|
|
const float * x_inc,
|
|
float * y,
|
|
size_t n_samples) {
|
|
BW_ASSERT(coeffs != BW_NULL);
|
|
BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_reset_coeffs);
|
|
BW_ASSERT(x != BW_NULL);
|
|
BW_ASSERT_DEEP(bw_has_only_finite(x, n_samples));
|
|
BW_ASSERT(coeffs->antialiasing ? x_inc != BW_NULL : 1);
|
|
BW_ASSERT_DEEP(coeffs->antialiasing ? bw_has_only_finite(x_inc, n_samples) : 1);
|
|
BW_ASSERT(y != BW_NULL);
|
|
|
|
if (coeffs->antialiasing)
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_osc_pulse_update_coeffs_audio(coeffs);
|
|
y[i] = bw_osc_pulse_process1_antialias(coeffs, x[i], x_inc[i]);
|
|
}
|
|
else
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_osc_pulse_update_coeffs_audio(coeffs);
|
|
y[i] = bw_osc_pulse_process1(coeffs, x[i]);
|
|
}
|
|
|
|
BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_reset_coeffs);
|
|
BW_ASSERT_DEEP(bw_has_only_finite(y, n_samples));
|
|
}
|
|
|
|
static inline void bw_osc_pulse_process_multi(
|
|
bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
|
|
const float * const * x,
|
|
const float * const * x_inc,
|
|
float * const * y,
|
|
size_t n_channels,
|
|
size_t n_samples) {
|
|
BW_ASSERT(coeffs != BW_NULL);
|
|
BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_reset_coeffs);
|
|
BW_ASSERT(x != BW_NULL);
|
|
BW_ASSERT(coeffs->antialiasing ? x_inc != BW_NULL : 1);
|
|
BW_ASSERT(y != BW_NULL);
|
|
#ifndef BW_NO_DEBUG
|
|
for (size_t i = 0; i < n_channels; i++)
|
|
for (size_t j = i + 1; j < n_channels; j++)
|
|
BW_ASSERT(y[i] != y[j]);
|
|
for (size_t i = 0; i < n_channels; i++)
|
|
for (size_t j = 0; j < n_channels; j++)
|
|
BW_ASSERT(i == j || x[i] != y[j]);
|
|
if (coeffs->antialiasing)
|
|
for (size_t i = 0; i < n_channels; i++)
|
|
for (size_t j = 0; j < n_channels; j++)
|
|
BW_ASSERT(i == j || x_inc[i] != y[j]);
|
|
#endif
|
|
|
|
if (coeffs->antialiasing)
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_osc_pulse_update_coeffs_audio(coeffs);
|
|
for (size_t j = 0; j < n_channels; j++)
|
|
y[j][i] = bw_osc_pulse_process1_antialias(coeffs, x[j][i], x_inc[j][i]);
|
|
}
|
|
else
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_osc_pulse_update_coeffs_audio(coeffs);
|
|
for (size_t j = 0; j < n_channels; j++)
|
|
y[j][i] = bw_osc_pulse_process1(coeffs, x[j][i]);
|
|
}
|
|
|
|
BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_reset_coeffs);
|
|
}
|
|
|
|
static inline void bw_osc_pulse_set_antialiasing(
|
|
bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
|
|
char value) {
|
|
BW_ASSERT(coeffs != BW_NULL);
|
|
BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_init);
|
|
|
|
coeffs->antialiasing = value;
|
|
|
|
BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_init);
|
|
}
|
|
|
|
static inline void bw_osc_pulse_set_pulse_width(
|
|
bw_osc_pulse_coeffs * BW_RESTRICT coeffs,
|
|
float value) {
|
|
BW_ASSERT(coeffs != BW_NULL);
|
|
BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_init);
|
|
BW_ASSERT(bw_is_finite(value));
|
|
BW_ASSERT(value >= 0.f && value <= 1.f);
|
|
|
|
coeffs->pulse_width = value;
|
|
|
|
BW_ASSERT_DEEP(bw_osc_pulse_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_osc_pulse_coeffs_state_init);
|
|
}
|
|
|
|
static inline char bw_osc_pulse_coeffs_is_valid(
|
|
const bw_osc_pulse_coeffs * BW_RESTRICT coeffs) {
|
|
BW_ASSERT(coeffs != BW_NULL);
|
|
|
|
#ifdef BW_DEBUG_DEEP
|
|
if (coeffs->hash != bw_hash_sdbm("bw_osc_pulse_coeffs"))
|
|
return 0;
|
|
if (coeffs->state < bw_osc_pulse_coeffs_state_init || coeffs->state > bw_osc_pulse_coeffs_state_reset_coeffs)
|
|
return 0;
|
|
#endif
|
|
|
|
if (!bw_is_finite(coeffs->pulse_width) || coeffs->pulse_width < 0.f || coeffs->pulse_width > 1.f)
|
|
return 0;
|
|
|
|
#ifdef BW_DEBUG_DEEP
|
|
if (coeffs->state >= bw_gain_coeffs_state_reset_coeffs && !bw_one_pole_state_is_valid(&coeffs->smooth_coeffs, &coeffs->smooth_state))
|
|
return 0;
|
|
#endif
|
|
|
|
return 1;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
|
|
#ifndef BW_CXX_NO_ARRAY
|
|
# include <array>
|
|
#endif
|
|
|
|
namespace Brickworks {
|
|
|
|
/*** Public C++ API ***/
|
|
|
|
/*! api_cpp {{{
|
|
* ##### Brickworks::OscPulse
|
|
* ```>>> */
|
|
template<size_t N_CHANNELS>
|
|
class OscPulse {
|
|
public:
|
|
OscPulse();
|
|
|
|
void setSampleRate(
|
|
float sampleRate);
|
|
|
|
void reset();
|
|
|
|
void process(
|
|
const float * const * x,
|
|
const float * const * xInc,
|
|
float * const * y,
|
|
size_t nSamples);
|
|
|
|
#ifndef BW_CXX_NO_ARRAY
|
|
void process(
|
|
std::array<const float *, N_CHANNELS> x,
|
|
std::array<const float *, N_CHANNELS> xInc,
|
|
std::array<float *, N_CHANNELS> y,
|
|
size_t nSamples);
|
|
#endif
|
|
|
|
void setAntialiasing(
|
|
bool value);
|
|
|
|
void setPulseWidth(
|
|
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_osc_pulse_coeffs coeffs;
|
|
};
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline OscPulse<N_CHANNELS>::OscPulse() {
|
|
bw_osc_pulse_init(&coeffs);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void OscPulse<N_CHANNELS>::setSampleRate(
|
|
float sampleRate) {
|
|
bw_osc_pulse_set_sample_rate(&coeffs, sampleRate);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void OscPulse<N_CHANNELS>::reset() {
|
|
bw_osc_pulse_reset_coeffs(&coeffs);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void OscPulse<N_CHANNELS>::process(
|
|
const float * const * x,
|
|
const float * const * xInc,
|
|
float * const * y,
|
|
size_t nSamples) {
|
|
bw_osc_pulse_process_multi(&coeffs, x, xInc, y, N_CHANNELS, nSamples);
|
|
}
|
|
|
|
#ifndef BW_CXX_NO_ARRAY
|
|
template<size_t N_CHANNELS>
|
|
inline void OscPulse<N_CHANNELS>::process(
|
|
std::array<const float *, N_CHANNELS> x,
|
|
std::array<const float *, N_CHANNELS> xInc,
|
|
std::array<float *, N_CHANNELS> y,
|
|
size_t nSamples) {
|
|
process(x.data(), xInc.data(), y.data(), nSamples);
|
|
}
|
|
#endif
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void OscPulse<N_CHANNELS>::setAntialiasing(
|
|
bool value) {
|
|
bw_osc_pulse_set_antialiasing(&coeffs, value);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void OscPulse<N_CHANNELS>::setPulseWidth(
|
|
float value) {
|
|
bw_osc_pulse_set_pulse_width(&coeffs, value);
|
|
}
|
|
|
|
}
|
|
#endif
|
|
|
|
#endif
|