117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
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/*
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* Brickworks
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*
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* Copyright (C) 2022 Orastron Srl unipersonale
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*
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* Brickworks is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License.
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*
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* Brickworks is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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*
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* File author: Stefano D'Angelo
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*/
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/*!
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* module_type {{{ dsp }}}
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* version {{{ 0.1.0 }}}
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* requires {{{ bw_config bw_common }}}
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* description {{{
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* Post-filter to decolorate oscillator waveshapers when antialiasing is on.
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*
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* This filter can be added in series of oscillator waveshapers that use
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* PolyBLEP antialiasing (i.e., [bw_osc_saw](bw_osc_saw),
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* [bw_osc_pulse](bw_osc_pulse), [bw_osc_tri](bw_osc_tri)) to compensate for
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* high-frequency attenuation.
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* }}}
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* changelog {{{
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* <ul>
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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_FILT_H
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#define _BW_OSC_FILT_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_filt
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* ```>>> */
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typedef struct _bw_osc_filt *bw_osc_filt;
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/*! <<<```
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* Instance handle.
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* >>> */
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/*! ...
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* #### bw_osc_filt_new()
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* ```>>> */
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bw_osc_filt bw_osc_filt_new();
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/*! <<<```
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* Creates a new instance.
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*
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* Returns the newly-created instance handle or `NULL` if there was not
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* enough memory.
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* >>> */
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/*! ...
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* #### bw_osc_filt_free()
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* ```>>> */
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void bw_osc_filt_free(bw_osc_filt instance);
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/*! <<<```
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* Destroys an `instance`.
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* >>> */
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/*! ...
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* #### bw_osc_filt_set_sample_rate()
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*
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* There is none (not needed).
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* >>> */
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/*! ...
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* #### bw_osc_filt_reset()
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* ```>>> */
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void bw_osc_filt_reset(bw_osc_filt instance);
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/*! <<<```
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* Resets the given `instance` to its initial state.
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* >>> */
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/*! ...
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* #### bw_osc_filt_process()
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* ```>>> */
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void bw_osc_filt_process(bw_osc_filt instance, const float *x, float* y, int n_samples);
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/*! <<<```
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* Lets the given `instance` process `n_samples` samples from the input
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* buffer `x` and fills the corresponding `n_samples` samples in the output
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* buffer `y`.
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* >>> */
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/*! ...
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* #### bw_osc_filt_set_enabled()
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* ```>>> */
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void bw_osc_filt_set_enabled(bw_osc_filt instance, char value);
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/*! <<<```
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* Sets whether the filter is enabled (`value` non-`0`) or bypassed (`0`)
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* for the given `instance`.
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*
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* Default value: non-`0`.
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* }}} */
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#ifdef __cplusplus
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}
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#endif
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#endif
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