bw_sampler tentative
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include/bw_sampler.h
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793
include/bw_sampler.h
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/*
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* Brickworks
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*
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* Copyright (C) 2025 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 }}}
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* description {{{
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* ...
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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>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_SAMPLER_H
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#define BW_SAMPLER_H
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#ifdef BW_INCLUDE_WITH_QUOTES
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# include "bw_common.h"
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#else
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# include <bw_common.h>
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#endif
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#if !defined(BW_CXX_NO_EXTERN_C) && defined(__cplusplus)
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extern "C" {
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#endif
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/*** Public API ***/
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/*! api {{{
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* #### bw_sampler_coeffs
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* ```>>> */
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typedef struct bw_sampler_coeffs bw_sampler_coeffs;
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/*! <<<```
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* Coefficients and related.
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*
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* #### bw_sampler_state
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* ```>>> */
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typedef struct bw_sampler_state bw_sampler_state;
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/*! <<<```
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* Internal state and related.
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*
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* #### bw_sampler_init()
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* ```>>> */
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static inline void bw_sampler_init(
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bw_sampler_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_sampler_set_sample_rate()
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* ```>>> */
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static inline void bw_sampler_set_sample_rate(
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bw_sampler_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_sampler_reset_coeffs()
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* ```>>> */
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static inline void bw_sampler_reset_coeffs(
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bw_sampler_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_sampler_reset_state()
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* ```>>> */
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static inline float bw_sampler_reset_state(
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const bw_sampler_coeffs * BW_RESTRICT coeffs,
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bw_sampler_state * BW_RESTRICT state,
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const float * BW_RESTRICT sample,
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size_t sample_length,
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float pos_0);
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/*! <<<```
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* ...
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*
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* #### bw_sampler_reset_state_multi()
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* ```>>> */
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static inline void bw_sampler_reset_state_multi(
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const bw_sampler_coeffs * BW_RESTRICT coeffs,
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bw_sampler_state * BW_RESTRICT const * BW_RESTRICT state,
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const float * BW_RESTRICT const * BW_RESTRICT sample,
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const size_t * BW_RESTRICT sample_length,
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const float * pos_0,
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float * y_0,
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size_t n_channels);
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/*! <<<```
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* ...
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*
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* #### bw_sampler_update_coeffs_ctrl()
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* ```>>> */
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static inline void bw_sampler_update_coeffs_ctrl(
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bw_sampler_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_sampler_update_coeffs_audio()
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* ```>>> */
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static inline void bw_sampler_update_coeffs_audio(
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bw_sampler_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_sampler_process1()
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* ```>>> */
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static inline float bw_sampler_process1(
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const bw_sampler_coeffs * BW_RESTRICT coeffs,
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bw_sampler_state * BW_RESTRICT state,
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const float * BW_RESTRICT sample,
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size_t sample_length);
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/*! <<<```
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* ...
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*
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* #### bw_sampler_process()
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* ```>>> */
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static inline void bw_sampler_process(
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bw_sampler_coeffs * BW_RESTRICT coeffs,
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bw_sampler_state * BW_RESTRICT state,
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const float * BW_RESTRICT sample,
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size_t sample_length,
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float * BW_RESTRICT y,
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size_t n_samples);
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/*! <<<```
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* ...
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*
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* #### bw_sampler_process_multi()
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* ```>>> */
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static inline void bw_sampler_process_multi(
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bw_sampler_coeffs * BW_RESTRICT coeffs,
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bw_sampler_state * BW_RESTRICT const * BW_RESTRICT state,
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const float * BW_RESTRICT const * BW_RESTRICT sample,
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const size_t * BW_RESTRICT sample_length,
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float * BW_RESTRICT const * BW_RESTRICT 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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* ...
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*
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* #### bw_sampler_set_playback_rate()
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* ```>>> */
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static inline void bw_sampler_set_playback_rate(
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bw_sampler_coeffs * BW_RESTRICT coeffs,
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float value);
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/*! <<<```
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* Sets the ... `value` in `coeffs`.
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*
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* `value` must be finite.
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*
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* Default value: `1.f`.
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*
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* #### bw_sampler_coeffs_is_valid()
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* ```>>> */
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static inline char bw_sampler_coeffs_is_valid(
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const bw_sampler_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_sampler_coeffs`.
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*
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* #### bw_sampler_state_is_valid()
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* ```>>> */
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static inline char bw_sampler_state_is_valid(
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const bw_sampler_coeffs * BW_RESTRICT coeffs,
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const bw_sampler_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 `BW_NULL` extra cross-checks might be performed
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* (`state` 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_sampler_state`.
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* }}} */
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#if !defined(BW_CXX_NO_EXTERN_C) && defined(__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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#ifdef BW_INCLUDE_WITH_QUOTES
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# include "bw_math.h"
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# include "bw_one_pole.h"
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#else
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# include <bw_math.h>
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# include <bw_one_pole.h>
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#endif
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#if !defined(BW_CXX_NO_EXTERN_C) && defined(__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_sampler_coeffs_state {
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bw_sampler_coeffs_state_invalid,
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bw_sampler_coeffs_state_init,
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bw_sampler_coeffs_state_set_sample_rate,
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bw_sampler_coeffs_state_reset_coeffs
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};
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#endif
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struct bw_sampler_coeffs {
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#ifdef BW_DEBUG_DEEP
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uint32_t hash;
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enum bw_sampler_coeffs_state state;
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uint32_t reset_id;
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#endif
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// Parameters
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float playback_rate;
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};
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struct bw_sampler_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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// States
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float pos;
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};
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static inline void bw_sampler_init(
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bw_sampler_coeffs * BW_RESTRICT coeffs) {
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BW_ASSERT(coeffs != BW_NULL);
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coeffs->playback_rate = 1.f;
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#ifdef BW_DEBUG_DEEP
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coeffs->hash = bw_hash_sdbm("bw_sampler_coeffs");
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coeffs->state = bw_sampler_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_sampler_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state == bw_sampler_coeffs_state_init);
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}
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static inline void bw_sampler_set_sample_rate(
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bw_sampler_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_sampler_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_init);
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BW_ASSERT(bw_is_finite(sample_rate) && sample_rate > 0.f);
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(void)coeffs;
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(void)sample_rate;
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#ifdef BW_DEBUG_DEEP
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coeffs->state = bw_sampler_coeffs_state_set_sample_rate;
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#endif
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BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state == bw_sampler_coeffs_state_set_sample_rate);
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}
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static inline void bw_sampler_reset_coeffs(
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bw_sampler_coeffs * BW_RESTRICT coeffs) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_set_sample_rate);
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(void)coeffs;
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#ifdef BW_DEBUG_DEEP
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coeffs->state = bw_sampler_coeffs_state_reset_coeffs;
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coeffs->reset_id++;
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#endif
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BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state == bw_sampler_coeffs_state_reset_coeffs);
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}
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static inline float bw_sampler_interpolate(
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const float * BW_RESTRICT sample,
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size_t sample_length,
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float pos) {
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{
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BW_ASSERT(sample_length > 0);
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float xm1, x0, x1, x2, d;
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if (pos >= 1.f) {
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const size_t p = static_cast<const size_t>(pos);
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if (p + 2 < sample_length) {
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xm1 = sample[p - 1];
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x0 = sample[p];
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x1 = sample[p + 1];
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x2 = sample[p + 2];
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} else if (p + 2 == sample_length) {
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xm1 = sample[p - 1];
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x0 = sample[p];
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x1 = sample[p + 1];
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x2 = 0.f;
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} else if (p + 1 == sample_length) {
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xm1 = sample[p - 1];
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x0 = sample[p];
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x1 = 0.f;
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x2 = 0.f;
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} else if (p == sample_length) {
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xm1 = sample[p - 1];
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x0 = 0.f;
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x1 = 0.f;
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x2 = 0.f;
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} else
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return 0.f;
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d = pos - p;
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} else if (pos >= 0.f) {
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xm1 = 0.f;
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x0 = sample[0];
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if (sample_length > 1) {
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x1 = sample[1];
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x2 = sample_length > 2 ? sample[2] : 0.f;
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} else {
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x1 = 0.f;
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x2 = 0.f;
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}
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d = pos;
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} else if (pos >= -1.f) {
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xm1 = 0.f;
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x0 = 0.f;
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x1 = sample[0];
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x2 = sample_length > 1 ? sample[1] : 0.f;
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d = pos + 1.f;
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} else if (pos >= -2.f) {
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xm1 = 0.f;
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x0 = 0.f;
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x1 = 0.f;
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x2 = sample[0];
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d = pos + 2.f;
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} else
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return 0.f;
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// 3rd degree B-spline
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return (d * ((0.5f - 0.1666666666666667f * d) * d - 0.5f) + 0.1666666666666667f) * xm1
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+ ((0.5f * d - 1.f) * d * d + 0.6666666666666666f) * x0
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+ (d * ((0.5f - 0.5f * d) * d + 0.5f) + 0.1666666666666667f) * x1
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+ 0.1666666666666667f * d * d * d * x2;
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}
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static inline float bw_sampler_reset_state(
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const bw_sampler_coeffs * BW_RESTRICT coeffs,
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bw_sampler_state * BW_RESTRICT state,
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const float * BW_RESTRICT sample,
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size_t sample_length,
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float pos_0) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
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BW_ASSERT(state != BW_NULL);
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BW_ASSERT(sample != BW_NULL);
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BW_ASSERT(sample_length > 0);
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BW_ASSERT_DEEP(bw_has_only_finite(sample, sample_length));
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BW_ASSERT(bw_is_finite(pos_0));
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BW_ASSERT(pos_0 >= 0.f);
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(void)coeffs;
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state->pos = pos_0;
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const float y = bw_sampler_interpolate(sample, sample_length, pos_0);
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#ifdef BW_DEBUG_DEEP
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state->hash = bw_hash_sdbm("bw_sampler_state");
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state->coeffs_reset_id = coeffs->reset_id;
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#endif
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BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
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BW_ASSERT_DEEP(bw_sampler_state_is_valid(coeffs, state));
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BW_ASSERT(bw_is_finite(y));
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return y;
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}
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static inline void bw_sampler_reset_state_multi(
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const bw_sampler_coeffs * BW_RESTRICT coeffs,
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bw_sampler_state * BW_RESTRICT const * BW_RESTRICT state,
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const float * BW_RESTRICT const * BW_RESTRICT sample,
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const size_t * BW_RESTRICT sample_length,
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const float * pos_0,
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float * y_0,
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size_t n_channels) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
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BW_ASSERT(state != BW_NULL);
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#ifndef BW_NO_DEBUG
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for (size_t i = 0; i < n_channels; i++)
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for (size_t j = i + 1; j < n_channels; j++)
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BW_ASSERT(state[i] != state[j]);
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#endif
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BW_ASSERT(sample != BW_NULL);
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BW_ASSERT(sample_length != BW_NULL);
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BW_ASSERT(pos_0 != BW_NULL);
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#ifndef BW_NO_DEBUG
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for (size_t i = 0; i < n_channels; i++) {
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BW_ASSERT(sample[i] != pos_0);
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BW_ASSERT(sample[i] != y_0);
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for (size_t j = i + 1; j < n_channels; j++)
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BW_ASSERT(sample[i] != sample[j]);
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}
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#endif
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if (y_0 != BW_NULL)
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for (size_t i = 0; i < n_channels; i++)
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y_0[i] = bw_sampler_reset_state(coeffs, state[i], sample[i], sample_length[i], pos_0[i]);
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else
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for (size_t i = 0; i < n_channels; i++)
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bw_sampler_reset_state(coeffs, state[i], sample[i], sample_length[i], pos_0[i]);
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BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
|
||||
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
|
||||
BW_ASSERT_DEEP(y_0 != BW_NULL ? bw_has_only_finite(y_0, n_channels) : 1);
|
||||
}
|
||||
|
||||
static inline void bw_sampler_update_coeffs_ctrl(
|
||||
bw_sampler_coeffs * BW_RESTRICT coeffs) {
|
||||
BW_ASSERT(coeffs != BW_NULL);
|
||||
BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
|
||||
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
|
||||
|
||||
(void)coeffs;
|
||||
}
|
||||
|
||||
static inline void bw_sampler_update_coeffs_audio(
|
||||
bw_sampler_coeffs * BW_RESTRICT coeffs) {
|
||||
BW_ASSERT(coeffs != BW_NULL);
|
||||
BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
|
||||
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
|
||||
|
||||
(void)coeffs;
|
||||
}
|
||||
|
||||
static inline float bw_sampler_process1(
|
||||
const bw_sampler_coeffs * BW_RESTRICT coeffs,
|
||||
bw_sampler_state * BW_RESTRICT state,
|
||||
const float * BW_RESTRICT sample,
|
||||
size_t sample_length) {
|
||||
BW_ASSERT(coeffs != BW_NULL);
|
||||
BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
|
||||
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
|
||||
BW_ASSERT(state != BW_NULL);
|
||||
BW_ASSERT_DEEP(bw_sampler_state_is_valid(coeffs, state));
|
||||
BW_ASSERT(sample != BW_NULL);
|
||||
BW_ASSERT(sample_length > 0);
|
||||
BW_ASSERT_DEEP(bw_has_only_finite(sample, sample_length));
|
||||
|
||||
float y;
|
||||
if (state->pos >= sample_length + 2) {
|
||||
y = bw_sampler_interpolate(sample, sample_length, state->pos);
|
||||
state->pos += coeffs->playback_rate;
|
||||
} else
|
||||
y = 0.f;
|
||||
|
||||
BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
|
||||
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
|
||||
BW_ASSERT_DEEP(bw_sampler_state_is_valid(coeffs, state));
|
||||
BW_ASSERT(bw_is_finite(y));
|
||||
|
||||
return y;
|
||||
}
|
||||
|
||||
static inline void bw_sampler_process(
|
||||
bw_sampler_coeffs * BW_RESTRICT coeffs,
|
||||
bw_sampler_state * BW_RESTRICT state,
|
||||
const float * BW_RESTRICT sample,
|
||||
size_t sample_length,
|
||||
float * BW_RESTRICT y,
|
||||
size_t n_samples) {
|
||||
BW_ASSERT(coeffs != BW_NULL);
|
||||
BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
|
||||
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
|
||||
BW_ASSERT(state != BW_NULL);
|
||||
BW_ASSERT_DEEP(bw_sampler_state_is_valid(coeffs, state));
|
||||
BW_ASSERT(sample != BW_NULL);
|
||||
BW_ASSERT(sample_length > 0);
|
||||
BW_ASSERT_DEEP(bw_has_only_finite(sample, sample_length));
|
||||
BW_ASSERT(y != BW_NULL);
|
||||
BW_ASSERT(sample != y);
|
||||
|
||||
for (size_t i = 0; i < n_samples; i++)
|
||||
y[i] = bw_sampler_process1(coeffs, state, sample, sample_length);
|
||||
|
||||
BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
|
||||
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
|
||||
BW_ASSERT_DEEP(bw_sampler_state_is_valid(coeffs, state));
|
||||
BW_ASSERT_DEEP(bw_has_only_finite(y, n_samples));
|
||||
}
|
||||
|
||||
static inline void bw_sampler_process_multi(
|
||||
bw_sampler_coeffs * BW_RESTRICT coeffs,
|
||||
bw_sampler_state * BW_RESTRICT const * BW_RESTRICT state,
|
||||
const float * BW_RESTRICT const * BW_RESTRICT sample,
|
||||
const size_t * BW_RESTRICT sample_length,
|
||||
float * BW_RESTRICT const * BW_RESTRICT y,
|
||||
size_t n_channels,
|
||||
size_t n_samples) {
|
||||
BW_ASSERT(coeffs != BW_NULL);
|
||||
BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
|
||||
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
|
||||
BW_ASSERT(state != BW_NULL);
|
||||
#ifndef BW_NO_DEBUG
|
||||
for (size_t i = 0; i < n_channels; i++) {
|
||||
BW_ASSERT(state[i] != BW_NULL);
|
||||
BW_ASSERT_DEEP(bw_sampler_state_is_valid(coeffs, state[i]));
|
||||
}
|
||||
for (size_t i = 0; i < n_channels; i++)
|
||||
for (size_t j = i + 1; j < n_channels; j++)
|
||||
BW_ASSERT(state[i] != state[j]);
|
||||
#endif
|
||||
BW_ASSERT(sample != BW_NULL);
|
||||
BW_ASSERT(sample_length != BW_NULL);
|
||||
BW_ASSERT(y != BW_NULL);
|
||||
#ifndef BW_NO_DEBUG
|
||||
for (size_t i = 0; i < n_channels; i++) {
|
||||
BW_ASSERT(sample[i] != BW_NULL);
|
||||
BW_ASSERT(sample_length[i] > 0);
|
||||
BW_ASSERT_DEEP(bw_has_only_finite(sample[i], sample_length[i]));
|
||||
BW_ASSERT(y[i] != BW_NULL);
|
||||
}
|
||||
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(sample[i] != y[j]);
|
||||
#endif
|
||||
|
||||
for (size_t j = 0; j < n_channels; j++)
|
||||
for (size_t i = 0; i < n_samples; i++)
|
||||
y[j][i] = bw_sampler_process1(coeffs, state[j], sample[j], sample_length[j]);
|
||||
|
||||
BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
|
||||
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
|
||||
#ifndef BW_NO_DEBUG
|
||||
for (size_t i = 0; i < n_channels; i++) {
|
||||
BW_ASSERT_DEEP(bw_sampler_state_is_valid(coeffs, state[i]));
|
||||
BW_ASSERT_DEEP(bw_has_only_finite(y[i], n_samples));
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
static inline void bw_sampler_set_playback_rate(
|
||||
bw_sampler_coeffs * BW_RESTRICT coeffs,
|
||||
float value) {
|
||||
BW_ASSERT(coeffs != BW_NULL);
|
||||
BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
|
||||
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_init);
|
||||
BW_ASSERT(bw_is_finite(value));
|
||||
BW_ASSERT(value >= 0.f);
|
||||
|
||||
coeffs->playback_rate = value;
|
||||
|
||||
BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
|
||||
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_init);
|
||||
}
|
||||
|
||||
static inline char bw_sampler_coeffs_is_valid(
|
||||
const bw_sampler_coeffs * BW_RESTRICT coeffs) {
|
||||
BW_ASSERT(coeffs != BW_NULL);
|
||||
|
||||
#ifdef BW_DEBUG_DEEP
|
||||
if (coeffs->hash != bw_hash_sdbm("bw_sampler_coeffs"))
|
||||
return 0;
|
||||
if (coeffs->state < bw_sampler_coeffs_state_init || coeffs->state > bw_sampler_coeffs_state_reset_coeffs)
|
||||
return 0;
|
||||
#endif
|
||||
|
||||
if (!bw_is_finite(coeffs->playback_rate) || coeffs->playback_rate < 0.f)
|
||||
return 0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static inline char bw_sampler_state_is_valid(
|
||||
const bw_sampler_coeffs * BW_RESTRICT coeffs,
|
||||
const bw_sampler_state * BW_RESTRICT state) {
|
||||
BW_ASSERT(state != BW_NULL);
|
||||
|
||||
#ifdef BW_DEBUG_DEEP
|
||||
if (state->hash != bw_hash_sdbm("bw_sampler_state"))
|
||||
return 0;
|
||||
|
||||
if (coeffs != BW_NULL && coeffs->reset_id != state->coeffs_reset_id)
|
||||
return 0;
|
||||
#endif
|
||||
|
||||
(void)coeffs;
|
||||
|
||||
return bw_is_finite(state->pos) && pos >= 0.f;
|
||||
}
|
||||
|
||||
#if !defined(BW_CXX_NO_EXTERN_C) && defined(__cplusplus)
|
||||
}
|
||||
#endif
|
||||
|
||||
#if !defined(BW_NO_CXX) && defined(__cplusplus)
|
||||
|
||||
# ifndef BW_CXX_NO_ARRAY
|
||||
# include <array>
|
||||
# endif
|
||||
|
||||
namespace Brickworks {
|
||||
|
||||
/*** Public C++ API ***/
|
||||
|
||||
/*! api_cpp {{{
|
||||
* ##### Brickworks::Sampler
|
||||
* ```>>> */
|
||||
template<size_t N_CHANNELS>
|
||||
class Sampler {
|
||||
public:
|
||||
Sampler();
|
||||
|
||||
void setSampleRate(
|
||||
float sampleRate);
|
||||
|
||||
void reset(
|
||||
const float * BW_RESTRICT const * BW_RESTRICT sample,
|
||||
const size_t * BW_RESTRICT sampleLength,
|
||||
float pos0 = 0.f,
|
||||
float * BW_RESTRICT y0 = BW_NULL);
|
||||
|
||||
# ifndef BW_CXX_NO_ARRAY
|
||||
void reset(
|
||||
std::array<const float * BW_RESTRICT, N_CHANNELS> sample,
|
||||
std::array<size_t, N_CHANNELS> sampleLength,
|
||||
float pos0,
|
||||
std::array<float, N_CHANNELS> * BW_RESTRICT y0);
|
||||
# endif
|
||||
|
||||
void reset(
|
||||
const float * BW_RESTRICT const * BW_RESTRICT sample,
|
||||
const size_t * BW_RESTRICT sampleLength,
|
||||
const float * pos0,
|
||||
float * y0 = BW_NULL);
|
||||
|
||||
# ifndef BW_CXX_NO_ARRAY
|
||||
void reset(
|
||||
std::array<const float * BW_RESTRICT, N_CHANNELS> sample,
|
||||
std::array<size_t, N_CHANNELS> sampleLength,
|
||||
std::array<float, N_CHANNELS> pos0,
|
||||
std::array<float, N_CHANNELS> * BW_RESTRICT y0 = BW_NULL);
|
||||
# endif
|
||||
|
||||
void process(
|
||||
const float * BW_RESTRICT const * BW_RESTRICT sample,
|
||||
const size_t * BW_RESTRICT sampleLength,
|
||||
float * const * y,
|
||||
size_t nSamples);
|
||||
|
||||
# ifndef BW_CXX_NO_ARRAY
|
||||
void process(
|
||||
std::array<const float * BW_RESTRICT, N_CHANNELS> sample,
|
||||
std::array<size_t, N_CHANNELS> sampleLength,
|
||||
std::array<float *, N_CHANNELS> y,
|
||||
size_t nSamples);
|
||||
# endif
|
||||
|
||||
void setPlaybackRate(
|
||||
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_sampler_coeffs coeffs;
|
||||
bw_sampler_state states[N_CHANNELS];
|
||||
bw_sampler_state * BW_RESTRICT statesP[N_CHANNELS];
|
||||
};
|
||||
|
||||
template<size_t N_CHANNELS>
|
||||
inline Sampler<N_CHANNELS>::Sampler() {
|
||||
bw_sampler_init(&coeffs);
|
||||
for (size_t i = 0; i < N_CHANNELS; i++)
|
||||
statesP[i] = states + i;
|
||||
}
|
||||
|
||||
template<size_t N_CHANNELS>
|
||||
inline void Sampler<N_CHANNELS>::setSampleRate(
|
||||
float sampleRate) {
|
||||
bw_sampler_set_sample_rate(&coeffs, sampleRate);
|
||||
}
|
||||
|
||||
template<size_t N_CHANNELS>
|
||||
inline void Sampler<N_CHANNELS>::reset(
|
||||
const float * BW_RESTRICT const * BW_RESTRICT sample,
|
||||
const size_t * BW_RESTRICT sampleLength,
|
||||
float pos0,
|
||||
float * BW_RESTRICT y0) {
|
||||
bw_sampler_reset_coeffs(&coeffs);
|
||||
if (y0 != BW_NULL)
|
||||
for (size_t i = 0; i < N_CHANNELS; i++)
|
||||
y0[i] = bw_sampler_reset_state(&coeffs, states + i, sample[i], sampleLength[i], pos0);
|
||||
else
|
||||
for (size_t i = 0; i < N_CHANNELS; i++)
|
||||
bw_sampler_reset_state(&coeffs, states + i, sample[i], sampleLength[i], pos0);
|
||||
}
|
||||
|
||||
# ifndef BW_CXX_NO_ARRAY
|
||||
template<size_t N_CHANNELS>
|
||||
inline void Sampler<N_CHANNELS>::reset(
|
||||
std::array<const float * BW_RESTRICT, N_CHANNELS> sample,
|
||||
std::array<size_t, N_CHANNELS> sampleLength,
|
||||
float pos0,
|
||||
std::array<float, N_CHANNELS> * BW_RESTRICT y0) {
|
||||
reset(sample.data(), sampleLength.data(), pos0, y0 != BW_NULL ? y0->data() : BW_NULL);
|
||||
}
|
||||
# endif
|
||||
|
||||
template<size_t N_CHANNELS>
|
||||
inline void Sampler<N_CHANNELS>::reset(
|
||||
const float * BW_RESTRICT const * BW_RESTRICT sample,
|
||||
const size_t * BW_RESTRICT sampleLength,
|
||||
const float * pos0,
|
||||
float * y0) {
|
||||
bw_sampler_reset_coeffs(&coeffs);
|
||||
bw_sampler_reset_state_multi(&coeffs, statesP, sample, sampleLength, pos0, y0, N_CHANNELS);
|
||||
}
|
||||
|
||||
# ifndef BW_CXX_NO_ARRAY
|
||||
template<size_t N_CHANNELS>
|
||||
inline void Sampler<N_CHANNELS>::reset(
|
||||
std::array<const float * BW_RESTRICT, N_CHANNELS> sample,
|
||||
std::array<size_t, N_CHANNELS> sampleLength,
|
||||
std::array<float, N_CHANNELS> pos0,
|
||||
std::array<float, N_CHANNELS> * BW_RESTRICT y0) {
|
||||
reset(sample.data(), sampleLength.data(), pos0.data(), y0 != BW_NULL ? y0->data() : BW_NULL);
|
||||
}
|
||||
# endif
|
||||
|
||||
template<size_t N_CHANNELS>
|
||||
inline void Sampler<N_CHANNELS>::process(
|
||||
const float * BW_RESTRICT const * BW_RESTRICT sample,
|
||||
const size_t * BW_RESTRICT sampleLength,
|
||||
float * const * y,
|
||||
size_t nSamples) {
|
||||
bw_sampler_process_multi(&coeffs, statesP, sample, sampleLength, y, N_CHANNELS, nSamples);
|
||||
}
|
||||
|
||||
# ifndef BW_CXX_NO_ARRAY
|
||||
template<size_t N_CHANNELS>
|
||||
inline void Sampler<N_CHANNELS>::process(
|
||||
std::array<const float * BW_RESTRICT, N_CHANNELS> sample,
|
||||
std::array<size_t, N_CHANNELS> sampleLength,
|
||||
std::array<float *, N_CHANNELS> y,
|
||||
size_t nSamples) {
|
||||
process(sample.data(), sampleLength.data(), y.data(), nSamples);
|
||||
}
|
||||
# endif
|
||||
|
||||
template<size_t N_CHANNELS>
|
||||
inline void Sampler<N_CHANNELS>::setPlaybackRate(
|
||||
float value) {
|
||||
bw_sampler_set_playback_rate(&coeffs, value);
|
||||
}
|
||||
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user