755 lines
22 KiB
C++
755 lines
22 KiB
C++
/*
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* Brickworks
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*
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* Copyright (C) 2023, 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 {{{ 1.1.0 }}}
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* requires {{{ bw_common bw_env_follow bw_math bw_one_pole }}}
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* description {{{
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* Digital peak programme meter with adjustable integration time constant.
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*
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* An integration time constant of `0.f` results in true-peak metering, while
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* values between `0.f` and `0.006f` give quasi-peak metering behavior.
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* }}}
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* changelog {{{
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* <ul>
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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>Enforced minimum output value <code>-600.f</code>.</li>
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* <li>Added initial input value to
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* <code>bw_ppm_reset_state()</code>.</li>
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* <li>Added <code>bw_ppm_reset_state_multi()</code> and updated C++
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* API in this regard.</li>
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* <li>Now <code>bw_ppm_reset_state()</code> returns the initial output
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* value.</li>
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* <li>Added overloaded C++ <code>reset()</code> functions taking
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* arrays as arguments.</li>
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* <li><code>bw_ppm_process()</code> and
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* <code>bw_ppm_process_multi()</code> now use <code>size_t</code>
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* to count samples and channels.</li>
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* <li>Added more <code>const</code> and <code>BW_RESTRICT</code>
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* specifiers to input arguments and implementation.</li>
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* <li>Moved C++ code to C header.</li>
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* <li>Added overloaded C++ <code>process()</code> function taking
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* C-style arrays as arguments.</li>
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* <li>Removed usage of reserved identifiers.</li>
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* </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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* <li>Fixed bug by forcing <code>-INFINITY</code> output when signal
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* level is below -600 dB.</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_ppm_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>0.3.0</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_PPM_H
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#define BW_PPM_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_ppm_coeffs
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* ```>>> */
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typedef struct bw_ppm_coeffs bw_ppm_coeffs;
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/*! <<<```
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* Coefficients and related.
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*
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* #### bw_ppm_state
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* ```>>> */
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typedef struct bw_ppm_state bw_ppm_state;
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/*! <<<```
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* Internal state and related.
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*
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* #### bw_ppm_init()
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* ```>>> */
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static inline void bw_ppm_init(
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bw_ppm_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_ppm_set_sample_rate()
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* ```>>> */
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static inline void bw_ppm_set_sample_rate(
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bw_ppm_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_ppm_reset_coeffs()
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* ```>>> */
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static inline void bw_ppm_reset_coeffs(
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bw_ppm_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_ppm_reset_state()
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* ```>>> */
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static inline float bw_ppm_reset_state(
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const bw_ppm_coeffs * BW_RESTRICT coeffs,
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bw_ppm_state * BW_RESTRICT state,
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float x_0);
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/*! <<<```
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* Resets the given `state` to its initial values using the given `coeffs`
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* and the initial input value `x_0`.
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*
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* Returns the corresponding initial output value.
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*
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* #### bw_ppm_reset_state_multi()
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* ```>>> */
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static inline void bw_ppm_reset_state_multi(
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const bw_ppm_coeffs * BW_RESTRICT coeffs,
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bw_ppm_state * BW_RESTRICT const * BW_RESTRICT state,
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const float * x_0,
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float * y_0,
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size_t n_channels);
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/*! <<<```
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* Resets each of the `n_channels` `state`s to its initial values using the
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* given `coeffs` and the corresponding initial input value in the `x_0`
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* array.
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*
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* The corresponding initial output values are written into the `y_0` array,
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* if not `BW_NULL`.
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*
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* #### bw_ppm_update_coeffs_ctrl()
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* ```>>> */
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static inline void bw_ppm_update_coeffs_ctrl(
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bw_ppm_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_ppm_update_coeffs_audio()
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* ```>>> */
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static inline void bw_ppm_update_coeffs_audio(
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bw_ppm_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_ppm_process1()
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* ```>>> */
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static inline float bw_ppm_process1(
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const bw_ppm_coeffs * BW_RESTRICT coeffs,
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bw_ppm_state * BW_RESTRICT state,
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float x);
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/*! <<<```
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* Processes one input sample `x` using `coeffs`, while using and updating
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* `state`. Returns the corresponding output sample value in dBSF (minimum
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* `-600.f`).
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*
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* #### bw_ppm_process()
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* ```>>> */
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static inline void bw_ppm_process(
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bw_ppm_coeffs * BW_RESTRICT coeffs,
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bw_ppm_state * BW_RESTRICT state,
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const float * x,
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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` and fills the
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* first `n_samples` of the output buffer `y`, while using and updating both
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* `coeffs` and `state` (control and audio rate).
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*
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* Output sample values are in dBFS (minimum `-600.f`).
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*
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* `y` may be `BW_NULL`.
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*
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* #### bw_ppm_process_multi()
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* ```>>> */
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static inline void bw_ppm_process_multi(
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bw_ppm_coeffs * BW_RESTRICT coeffs,
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bw_ppm_state * BW_RESTRICT const * BW_RESTRICT state,
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const float * const * x,
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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` and
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* fills the first `n_samples` of the `n_channels` output buffers `y`, while
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* using and updating both the common `coeffs` and each of the `n_channels`
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* `state`s (control and audio rate).
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*
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* Output sample values are in dBFS (minimum `-600.f`).
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*
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* `y` or any element of `y` may be `BW_NULL`.
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*
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* #### bw_ppm_set_integration_time()
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* ```>>> */
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static inline void bw_ppm_set_integration_tau(
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bw_ppm_coeffs * BW_RESTRICT coeffs,
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float value);
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/*! <<<```
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* Sets the upgoing (integration) time constant in `coeffs` to `value` (s).
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*
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* `value` must be non-negative.
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*
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* Default value: `0.f`.
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*
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* #### bw_ppm_get_y_z1()
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* ```>>> */
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static inline float bw_ppm_get_y_z1(
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const bw_ppm_state * BW_RESTRICT state);
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/*! <<<```
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* Returns the last output sample as stored in `state`.
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*
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* #### bw_ppm_coeffs_is_valid()
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* ```>>> */
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static inline char bw_ppm_coeffs_is_valid(
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const bw_ppm_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_ppm_coeffs`.
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*
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* #### bw_ppm_state_is_valid()
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* ```>>> */
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static inline char bw_ppm_state_is_valid(
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const bw_ppm_coeffs * BW_RESTRICT coeffs,
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const bw_ppm_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_ppm_state`.
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* }}} */
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#ifdef __cplusplus
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}
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#endif
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/*** Implementation ***/
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/* WARNING: This part of the file is not part of the public API. Its content may
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* change at any time in future versions. Please, do not use it directly. */
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#include <bw_env_follow.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_ppm_coeffs_state {
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bw_ppm_coeffs_state_invalid,
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bw_ppm_coeffs_state_init,
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bw_ppm_coeffs_state_set_sample_rate,
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bw_ppm_coeffs_state_reset_coeffs
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};
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#endif
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struct bw_ppm_coeffs {
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#ifdef BW_DEBUG_DEEP
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uint32_t hash;
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enum bw_ppm_coeffs_state state;
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uint32_t reset_id;
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#endif
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// Sub-components
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bw_env_follow_coeffs env_follow_coeffs;
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};
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struct bw_ppm_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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// Sub-components
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bw_env_follow_state env_follow_state;
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// States
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float y_z1;
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};
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static inline void bw_ppm_init(
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bw_ppm_coeffs * BW_RESTRICT coeffs) {
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BW_ASSERT(coeffs != BW_NULL);
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bw_env_follow_init(&coeffs->env_follow_coeffs);
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bw_env_follow_set_release_tau(&coeffs->env_follow_coeffs, 0.738300619235528f);
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#ifdef BW_DEBUG_DEEP
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coeffs->hash = bw_hash_sdbm("bw_ppm_coeffs");
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coeffs->state = bw_ppm_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_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state == bw_ppm_coeffs_state_init);
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}
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static inline void bw_ppm_set_sample_rate(
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bw_ppm_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_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_init);
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BW_ASSERT(bw_is_finite(sample_rate) && sample_rate > 0.f);
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bw_env_follow_set_sample_rate(&coeffs->env_follow_coeffs, sample_rate);
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#ifdef BW_DEBUG_DEEP
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coeffs->state = bw_ppm_coeffs_state_set_sample_rate;
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#endif
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BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state == bw_ppm_coeffs_state_set_sample_rate);
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}
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static inline void bw_ppm_reset_coeffs(
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bw_ppm_coeffs * BW_RESTRICT coeffs) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_set_sample_rate);
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bw_env_follow_reset_coeffs(&coeffs->env_follow_coeffs);
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#ifdef BW_DEBUG_DEEP
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coeffs->state = bw_ppm_coeffs_state_reset_coeffs;
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coeffs->reset_id++;
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#endif
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BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state == bw_ppm_coeffs_state_reset_coeffs);
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}
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static inline float bw_ppm_reset_state(
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const bw_ppm_coeffs * BW_RESTRICT coeffs,
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bw_ppm_state * BW_RESTRICT state,
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float x_0) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
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BW_ASSERT(state != BW_NULL);
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BW_ASSERT(bw_is_finite(x_0));
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const float yl = bw_env_follow_reset_state(&coeffs->env_follow_coeffs, &state->env_follow_state, x_0);
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const float y = yl >= 1e-30f ? bw_lin2dBf(yl) : -600.f;
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state->y_z1 = y;
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#ifdef BW_DEBUG_DEEP
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state->hash = bw_hash_sdbm("bw_ppm_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_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
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BW_ASSERT_DEEP(bw_ppm_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_ppm_reset_state_multi(
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const bw_ppm_coeffs * BW_RESTRICT coeffs,
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bw_ppm_state * BW_RESTRICT const * BW_RESTRICT state,
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const float * x_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_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_ppm_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(x_0 != BW_NULL);
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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_ppm_reset_state(coeffs, state[i], x_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_ppm_reset_state(coeffs, state[i], x_0[i]);
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BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
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BW_ASSERT_DEEP(y_0 != BW_NULL ? bw_has_only_finite(y_0, n_channels) : 1);
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}
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static inline void bw_ppm_update_coeffs_ctrl(
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bw_ppm_coeffs * BW_RESTRICT coeffs) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
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bw_env_follow_update_coeffs_ctrl(&coeffs->env_follow_coeffs);
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BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
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}
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static inline void bw_ppm_update_coeffs_audio(
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bw_ppm_coeffs * BW_RESTRICT coeffs) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
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bw_env_follow_update_coeffs_audio(&coeffs->env_follow_coeffs);
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BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
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BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
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}
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static inline float bw_ppm_process1(
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const bw_ppm_coeffs * BW_RESTRICT coeffs,
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bw_ppm_state * BW_RESTRICT state,
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float x) {
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BW_ASSERT(coeffs != BW_NULL);
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BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
|
|
BW_ASSERT(state != BW_NULL);
|
|
BW_ASSERT_DEEP(bw_ppm_state_is_valid(coeffs, state));
|
|
BW_ASSERT(bw_is_finite(x));
|
|
|
|
const float yl = bw_env_follow_process1(&coeffs->env_follow_coeffs, &state->env_follow_state, x);
|
|
const float y = yl >= 1e-30f ? bw_lin2dBf(yl) : -600.f; // -600 dB is quiet enough
|
|
state->y_z1 = y;
|
|
|
|
BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
|
|
BW_ASSERT_DEEP(bw_ppm_state_is_valid(coeffs, state));
|
|
BW_ASSERT(bw_is_finite(y));
|
|
|
|
return y;
|
|
}
|
|
|
|
static inline void bw_ppm_process(
|
|
bw_ppm_coeffs * BW_RESTRICT coeffs,
|
|
bw_ppm_state * BW_RESTRICT state,
|
|
const float * x,
|
|
float * y,
|
|
size_t n_samples) {
|
|
BW_ASSERT(coeffs != BW_NULL);
|
|
BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
|
|
BW_ASSERT(state != BW_NULL);
|
|
BW_ASSERT_DEEP(bw_ppm_state_is_valid(coeffs, state));
|
|
BW_ASSERT(x != BW_NULL);
|
|
BW_ASSERT_DEEP(bw_has_only_finite(x, n_samples));
|
|
|
|
bw_ppm_update_coeffs_ctrl(coeffs);
|
|
if (y != BW_NULL)
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_ppm_update_coeffs_audio(coeffs);
|
|
y[i] = bw_ppm_process1(coeffs, state, x[i]);
|
|
}
|
|
else
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_ppm_update_coeffs_audio(coeffs);
|
|
bw_ppm_process1(coeffs, state, x[i]);
|
|
}
|
|
|
|
BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
|
|
BW_ASSERT_DEEP(bw_ppm_state_is_valid(coeffs, state));
|
|
BW_ASSERT_DEEP(y != BW_NULL ? bw_has_only_finite(y, n_samples) : 1);
|
|
}
|
|
|
|
static inline void bw_ppm_process_multi(
|
|
bw_ppm_coeffs * BW_RESTRICT coeffs,
|
|
bw_ppm_state * BW_RESTRICT const * BW_RESTRICT state,
|
|
const float * const * x,
|
|
float * const * y,
|
|
size_t n_channels,
|
|
size_t n_samples) {
|
|
BW_ASSERT(coeffs != BW_NULL);
|
|
BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
|
|
BW_ASSERT(state != 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(state[i] != state[j]);
|
|
#endif
|
|
BW_ASSERT(x != BW_NULL);
|
|
#ifndef BW_NO_DEBUG
|
|
if (y != 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] == BW_NULL || y[j] == BW_NULL || y[i] != y[j]);
|
|
#endif
|
|
|
|
bw_ppm_update_coeffs_ctrl(coeffs);
|
|
if (y != BW_NULL)
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_ppm_update_coeffs_audio(coeffs);
|
|
for (size_t j = 0; j < n_channels; j++) {
|
|
const float v = bw_ppm_process1(coeffs, state[j], x[j][i]);
|
|
if (y[j] != BW_NULL)
|
|
y[j][i] = v;
|
|
}
|
|
}
|
|
else
|
|
for (size_t i = 0; i < n_samples; i++) {
|
|
bw_ppm_update_coeffs_audio(coeffs);
|
|
for (size_t j = 0; j < n_channels; j++)
|
|
bw_ppm_process1(coeffs, state[j], x[j][i]);
|
|
}
|
|
|
|
BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_reset_coeffs);
|
|
}
|
|
|
|
static inline void bw_ppm_set_integration_tau(
|
|
bw_ppm_coeffs * BW_RESTRICT coeffs,
|
|
float value) {
|
|
BW_ASSERT(coeffs != BW_NULL);
|
|
BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_init);
|
|
BW_ASSERT(!bw_is_nan(value));
|
|
BW_ASSERT(value >= 0.f);
|
|
|
|
bw_env_follow_set_attack_tau(&coeffs->env_follow_coeffs, value);
|
|
|
|
BW_ASSERT_DEEP(bw_ppm_coeffs_is_valid(coeffs));
|
|
BW_ASSERT_DEEP(coeffs->state >= bw_ppm_coeffs_state_init);
|
|
}
|
|
|
|
static inline float bw_ppm_get_y_z1(const bw_ppm_state *BW_RESTRICT state) {
|
|
BW_ASSERT(state != BW_NULL);
|
|
BW_ASSERT_DEEP(bw_ppm_state_is_valid(BW_NULL, state));
|
|
|
|
return state->y_z1;
|
|
}
|
|
|
|
static inline char bw_ppm_coeffs_is_valid(
|
|
const bw_ppm_coeffs * BW_RESTRICT coeffs) {
|
|
BW_ASSERT(coeffs != BW_NULL);
|
|
|
|
#ifdef BW_DEBUG_DEEP
|
|
if (coeffs->hash != bw_hash_sdbm("bw_ppm_coeffs"))
|
|
return 0;
|
|
if (coeffs->state < bw_ppm_coeffs_state_init || coeffs->state > bw_ppm_coeffs_state_reset_coeffs)
|
|
return 0;
|
|
#endif
|
|
|
|
return bw_env_follow_coeffs_is_valid(&coeffs->env_follow_coeffs);
|
|
}
|
|
|
|
static inline char bw_ppm_state_is_valid(
|
|
const bw_ppm_coeffs * BW_RESTRICT coeffs,
|
|
const bw_ppm_state * BW_RESTRICT state) {
|
|
BW_ASSERT(state != BW_NULL);
|
|
|
|
#ifdef BW_DEBUG_DEEP
|
|
if (state->hash != bw_hash_sdbm("bw_ppm_state"))
|
|
return 0;
|
|
|
|
if (coeffs != BW_NULL && coeffs->reset_id != state->coeffs_reset_id)
|
|
return 0;
|
|
#endif
|
|
|
|
if (!bw_is_finite(state->y_z1) || state->y_z1 < -600.f)
|
|
return 0.f;
|
|
|
|
return bw_env_follow_state_is_valid(coeffs ? &coeffs->env_follow_coeffs : BW_NULL, &state->env_follow_state);
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
|
|
#ifndef BW_CXX_NO_ARRAY
|
|
# include <array>
|
|
#endif
|
|
|
|
namespace Brickworks {
|
|
|
|
/*** Public C++ API ***/
|
|
|
|
/*! api_cpp {{{
|
|
* ##### Brickworks::PPM
|
|
* ```>>> */
|
|
template<size_t N_CHANNELS>
|
|
class PPM {
|
|
public:
|
|
PPM();
|
|
|
|
void setSampleRate(
|
|
float sampleRate);
|
|
|
|
void reset(
|
|
float x0 = 0.f,
|
|
float * BW_RESTRICT y0 = nullptr);
|
|
|
|
#ifndef BW_CXX_NO_ARRAY
|
|
void reset(
|
|
float x0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT y0);
|
|
#endif
|
|
|
|
void reset(
|
|
const float * x0,
|
|
float * y0 = nullptr);
|
|
|
|
#ifndef BW_CXX_NO_ARRAY
|
|
void reset(
|
|
std::array<float, N_CHANNELS> x0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT y0 = nullptr);
|
|
#endif
|
|
|
|
void process(
|
|
const float * const * x,
|
|
float * const * y,
|
|
size_t nSamples);
|
|
|
|
#ifndef BW_CXX_NO_ARRAY
|
|
void process(
|
|
std::array<const float *, N_CHANNELS> x,
|
|
std::array<float *, N_CHANNELS> y,
|
|
size_t nSamples);
|
|
#endif
|
|
|
|
void setIntegrationTau(
|
|
float value);
|
|
|
|
float getYZ1(
|
|
size_t channel);
|
|
/*! <<<...
|
|
* }
|
|
* ```
|
|
* }}} */
|
|
|
|
/*** 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_ppm_coeffs coeffs;
|
|
bw_ppm_state states[N_CHANNELS];
|
|
bw_ppm_state * BW_RESTRICT statesP[N_CHANNELS];
|
|
};
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline PPM<N_CHANNELS>::PPM() {
|
|
bw_ppm_init(&coeffs);
|
|
for (size_t i = 0; i < N_CHANNELS; i++)
|
|
statesP[i] = states + i;
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void PPM<N_CHANNELS>::setSampleRate(
|
|
float sampleRate) {
|
|
bw_ppm_set_sample_rate(&coeffs, sampleRate);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void PPM<N_CHANNELS>::reset(
|
|
float x0,
|
|
float * BW_RESTRICT y0) {
|
|
bw_ppm_reset_coeffs(&coeffs);
|
|
if (y0 != nullptr)
|
|
for (size_t i = 0; i < N_CHANNELS; i++)
|
|
y0[i] = bw_ppm_reset_state(&coeffs, states + i, x0);
|
|
else
|
|
for (size_t i = 0; i < N_CHANNELS; i++)
|
|
bw_ppm_reset_state(&coeffs, states + i, x0);
|
|
}
|
|
|
|
#ifndef BW_CXX_NO_ARRAY
|
|
template<size_t N_CHANNELS>
|
|
inline void PPM<N_CHANNELS>::reset(
|
|
float x0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT y0) {
|
|
reset(x0, y0 != nullptr ? y0->data() : nullptr);
|
|
}
|
|
#endif
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void PPM<N_CHANNELS>::reset(
|
|
const float * x0,
|
|
float * y0) {
|
|
bw_ppm_reset_coeffs(&coeffs);
|
|
bw_ppm_reset_state_multi(&coeffs, statesP, x0, y0, N_CHANNELS);
|
|
}
|
|
|
|
#ifndef BW_CXX_NO_ARRAY
|
|
template<size_t N_CHANNELS>
|
|
inline void PPM<N_CHANNELS>::reset(
|
|
std::array<float, N_CHANNELS> x0,
|
|
std::array<float, N_CHANNELS> * BW_RESTRICT y0) {
|
|
reset(x0.data(), y0 != nullptr ? y0->data() : nullptr);
|
|
}
|
|
#endif
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void PPM<N_CHANNELS>::process(
|
|
const float * const * x,
|
|
float * const * y,
|
|
size_t nSamples) {
|
|
bw_ppm_process_multi(&coeffs, statesP, x, y, N_CHANNELS, nSamples);
|
|
}
|
|
|
|
#ifndef BW_CXX_NO_ARRAY
|
|
template<size_t N_CHANNELS>
|
|
inline void PPM<N_CHANNELS>::process(
|
|
std::array<const float *, N_CHANNELS> x,
|
|
std::array<float *, N_CHANNELS> y,
|
|
size_t nSamples) {
|
|
process(x.data(), y.data(), nSamples);
|
|
}
|
|
#endif
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline void PPM<N_CHANNELS>::setIntegrationTau(
|
|
float value) {
|
|
bw_ppm_set_integration_tau(&coeffs, value);
|
|
}
|
|
|
|
template<size_t N_CHANNELS>
|
|
inline float PPM<N_CHANNELS>::getYZ1(
|
|
size_t channel) {
|
|
return bw_ppm_get_y_z1(states + channel);
|
|
}
|
|
|
|
}
|
|
#endif
|
|
|
|
#endif
|