diff --git a/TODO b/TODO index 5852560..e0cf0c3 100644 --- a/TODO +++ b/TODO @@ -19,6 +19,7 @@ code: * common smoothing policy (as control rate as possible?) - smoothing control? * avoid "force" in coeffs update by using inline functions? * should rather use backward Euler in bw_onepole? +* Q to slope and viceversa functions in 2nd order shelf filters? build system: * make makefiles handle paths with spaces etc diff --git a/include/bw_hs2.h b/include/bw_hs2.h new file mode 100644 index 0000000..699cfe0 --- /dev/null +++ b/include/bw_hs2.h @@ -0,0 +1,310 @@ +/* + * Brickworks + * + * Copyright (C) 2022 Orastron Srl unipersonale + * + * Brickworks is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, version 3 of the License. + * + * Brickworks is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with Brickworks. If not, see . + * + * File author: Stefano D'Angelo + */ + +/*! + * module_type {{{ dsp }}} + * version {{{ 0.3.0 }}} + * requires {{{ + * bw_config bw_common bw_gain bw_math bw_mm2 bw_one_pole bw_svf + * }}} + * description {{{ + * Second-order high shelf filter (12 dB/oct) with unitary DC gain. + * + * The quality factor can be either directly controlled via the Q parameter + * or indirectly through the slope parameter, which indicates the "shelf + * slope" as defined in the "Cookbook formulae for audio EQ biquad filter + * coefficients" by Robert Bristow-Johnson. The use_slope parameter allows + * you to choose which parameterization to use. + * }}} + * changelog {{{ + * + * }}} + */ + +#ifndef _BW_HS2_H +#define _BW_HS2_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include + +/*! api {{{ + * #### bw_hs2_coeffs + * ```>>> */ +typedef struct _bw_hs2_coeffs bw_hs2_coeffs; +/*! <<<``` + * Coefficients and related. + * + * #### bw_hs2_state + * ```>>> */ +typedef struct _bw_hs2_state bw_hs2_state; +/*! <<<``` + * Internal state and related. + * + * #### bw_hs2_init() + * ```>>> */ +static inline void bw_hs2_init(bw_hs2_coeffs *BW_RESTRICT coeffs); +/*! <<<``` + * Initializes input parameter values in `coeffs`. + * + * #### bw_hs2_set_sample_rate() + * ```>>> */ +static inline void bw_hs2_set_sample_rate(bw_hs2_coeffs *BW_RESTRICT coeffs, float sample_rate); +/*! <<<``` + * Sets the `sample_rate` (Hz) value in `coeffs`. + * + * #### bw_hs2_reset_coeffs() + * ```>>> */ +static inline void bw_hs2_reset_coeffs(bw_hs2_coeffs *BW_RESTRICT coeffs); +/*! <<<``` + * Resets coefficients in `coeffs` to assume their target values. + * + * #### bw_hs2_reset_state() + * ```>>> */ +static inline void bw_hs2_reset_state(const bw_hs2_coeffs *BW_RESTRICT coeffs, bw_hs2_state *BW_RESTRICT state); +/*! <<<``` + * Resets the given `state` to its initial values using the given `coeffs`. + * + * #### bw_hs2_update_coeffs_ctrl() + * ```>>> */ +static inline void bw_hs2_update_coeffs_ctrl(bw_hs2_coeffs *BW_RESTRICT coeffs); +/*! <<<``` + * Triggers control-rate update of coefficients in `coeffs`. + * + * #### bw_hs2_update_coeffs_audio() + * ```>>> */ +static inline void bw_hs2_update_coeffs_audio(bw_hs2_coeffs *BW_RESTRICT coeffs); +/*! <<<``` + * Triggers audio-rate update of coefficients in `coeffs`. + * + * #### bw_hs2_process1() + * ```>>> */ +static inline float bw_hs2_process1(const bw_hs2_coeffs *BW_RESTRICT coeffs, bw_hs2_state *BW_RESTRICT state, float x); +/*! <<<``` + * Processes one input sample `x` using `coeffs`, while using and updating + * `state`. Returns the corresponding output sample. + * + * #### bw_hs2_process() + * ```>>> */ +static inline void bw_hs2_process(bw_hs2_coeffs *BW_RESTRICT coeffs, bw_hs2_state *BW_RESTRICT state, const float *x, float *y, int n_samples); +/*! <<<``` + * Processes the first `n_samples` of the input buffer `x` and fills the + * first `n_samples` of the output buffer `y`, while using and updating both + * `coeffs` and `state` (control and audio rate). + * + * #### bw_hs2_set_cutoff() + * ```>>> */ +static inline void bw_hs2_set_cutoff(bw_hs2_coeffs *BW_RESTRICT coeffs, float value); +/*! <<<``` + * Sets the cutoff frequency `value` (Hz) in `coeffs`. + * + * Default value: `1e3f`. + * + * #### bw_hs2_set_Q() + * ```>>> */ +static inline void bw_hs2_set_Q(bw_mm2_coeffs *BW_RESTRICT coeffs, float value); +/*! <<<``` + * Sets the quality factor to the given `value` in `coeffs`. + * + * `value` must be equal or bigger than `0.5f`. + * + * Default value: `0.5f`. + * + * #### bw_hs2_set_dc_gain_lin() + * ```>>> */ +static inline void bw_hs2_set_dc_gain_lin(bw_hs2_coeffs *BW_RESTRICT coeffs, float value); +/*! <<<``` + * Sets the dc gain parameter to the given `value` (linear gain) in `coeffs`. + * + * Default value: `0.f`. + * + * #### bw_hs2_set_dc_gain_dB() + * ```>>> */ +static inline void bw_hs2_set_dc_gain_dB(bw_hs2_coeffs *BW_RESTRICT coeffs, float value); +/*! <<<``` + * Sets the dc gain parameter to the given `value` (dB) in `coeffs`. + * + * Default value: `-INFINITY`. + * + * #### bw_hs2_set_slope() + * ```>>> */ +static inline void bw_hs2_set_slope(bw_hs2_coeffs *BW_RESTRICT coeffs, float value); +/*! <<<``` + * Sets the shelf slope `value` in `coeffs`. + * + * Default value: `0.5f`. + * + * #### bw_hs2_set_use_slope() + * ```>>> */ +static inline void bw_hs2_set_use_slope(bw_mm2_coeffs *BW_RESTRICT coeffs, char value); +/*! <<<``` + * Sets whether the quality factor should be controlled via the slope + * parameter (`value` non-`0`) or via the Q parameter (`0`). + * + * Default value: non-`0` (use slope parameter). + * }}} */ + +/*** 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. */ + +#include +#include + +struct _bw_hs2_coeffs { + // Sub-components + bw_mm2_coeffs mm2_coeffs; + + // Coefficients + float sg; + float isg; + + // Parameters + float gain; + float Q; + float slope; + char use_slope; + int param_changed; +}; + +struct _bw_hs2_state { + bw_mm2_state mm2_state; +}; + +#define _BW_HS2_PARAM_GAIN 1 +#define _BW_HS2_PARAM_Q (1<<1) +#define _BW_HS2_PARAM_SLOPE (1<<1) + +static inline void bw_hs2_init(bw_hs2_coeffs *BW_RESTRICT coeffs) { + bw_mm2_init(&coeffs->mm2_coeffs); + coeffs->gain = 1.f; + coeffs->Q = 0.5f; + coeffs->slope = 0.5f; + coeffs->use_slope = 1; +} + +static inline void bw_hs2_set_sample_rate(bw_hs2_coeffs *BW_RESTRICT coeffs, float sample_rate) { + bw_mm2_set_sample_rate(&coeffs->mm2_coeffs, sample_rate); +} + +static inline void bw_hs2_reset_coeffs(bw_hs2_coeffs *BW_RESTRICT coeffs) { + bw_mm2_reset_coeffs(&coeffs->mm2_coeffs); + coeffs->param_changed = ~0; + bw_hs2_update_coeffs_ctrl(coeffs); +} + +static inline void bw_hs2_reset_state(const bw_hs2_coeffs *BW_RESTRICT coeffs, bw_hs2_state *BW_RESTRICT state) { + bw_mm2_reset_state(&coeffs->mm2_coeffs, &state->mm2_state); +} + +static inline void bw_hs2_update_coeffs_ctrl(bw_hs2_coeffs *BW_RESTRICT coeffs) { + if (coeffs->param_changed) { + if (coeffs->param_changed & _BW_HS2_PARAM_GAIN) { + coeffs->sg = bw_math_sqrtf_2(coeffs->gain); + coeffs->isg = bw_rcpf_2(coeffs->sg); + bw_mm2_set_coeff_x(&coeffs->mm2_coeffs, coeffs->sg); + bw_mm2_set_coeff_lp(&coeffs->mm2_coeffs, 1.f - coeffs->sg); + bw_mm2_set_coeff_hp(&coeffs->mm2_coeffs, coeffs->gain - coeffs->sg); + } + if (coeffs->use_slope) { + if (coeffs->param_changed & _BW_HS2_PARAM_SLOPE) { + const float k = coeffs->sg + coeffs->isg; + bw_mm2_set_Q(&coeffs->mm2_coeffs, bw_sqrtf_2(coeffs->slope * bw_rcpf_2(coeffs->slope + coeffs->slope + k - k * coeffs->slope))); + } + } + else { + if (coeffs->param_changed & _BW_HS2_PARAM_Q) + bw_mm2_set_Q(&coeffs->mm2_coeffs, coeffs->Q); + } + coeffs->param_changed = 0; + } + bw_mm2_update_coeffs_ctrl(&coeffs->mm2_coeffs); +} + +static inline void bw_hs2_update_coeffs_audio(bw_hs2_coeffs *BW_RESTRICT coeffs) { + bw_mm2_update_coeffs_audio(&coeffs->mm2_coeffs); +} + +static inline float bw_hs2_process1(const bw_hs2_coeffs *BW_RESTRICT coeffs, bw_hs2_state *BW_RESTRICT state, float x) { + return bw_mm2_process1(&coeffs->mm2_coeffs, &state->mm2_state, x); +} + +static inline void bw_hs2_process(bw_hs2_coeffs *BW_RESTRICT coeffs, bw_hs2_state *BW_RESTRICT state, const float *x, float *y, int n_samples) { + bw_hs2_update_coeffs_ctrl(coeffs); + for (int i = 0; i < n_samples; i++) { + bw_hs2_update_coeffs_audio(coeffs); + y[i] = bw_hs2_process1(coeffs, state, x[i]); + } +} + +static inline void bw_hs2_set_cutoff(bw_hs2_coeffs *BW_RESTRICT coeffs, float value) { + bw_mm2_set_cutoff(&coeffs->mm2_coeffs, value); +} + +static inline void bw_hs2_set_Q(bw_mm2_coeffs *BW_RESTRICT coeffs, float value) { + if (coeffs->Q != value) { + coeffs->Q = value; + coeffs->param_changed |= _BW_HS2_PARAM_Q; + } +} + +static inline void bw_hs2_set_dc_gain_lin(bw_hs2_coeffs *BW_RESTRICT coeffs, float value) { + if (coeffs->gain != value) { + coeffs->gain = value; + coeffs->param_changed |= _BW_HS2_PARAM_GAIN; + } +} + +static inline void bw_hs2_set_dc_gain_dB(bw_hs2_coeffs *BW_RESTRICT coeffs, float value) { + bw_hs2_set_dc_gain_lin(coeffs, bw_dB2linf_3(value)); +} + +static inline void bw_hs2_set_slope(bw_hs2_coeffs *BW_RESTRICT coeffs, float value) { + if (coeffs->slope != value) { + coeffs->slope = value; + coeffs->param_changed |= _BW_HS2_PARAM_SLOPE; + } +} + +static inline void bw_hs2_set_use_slope(bw_mm2_coeffs *BW_RESTRICT coeffs, char value) { + if ((coeffs->use_slope && !value) || (!coeffs->use_slope && value)) { + coeffs->use_slope = value; + coeffs->param_changed |= _BW_HS2_PARAM_Q | _BW_HS2_PARAM_SLOPE; + } +} + +#undef _BW_HS2_PARAM_GAIN +#undef _BW_HS2_PARAM_Q +#undef _BW_HS2_PARAM_S + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/include/bw_ls1.h b/include/bw_ls1.h index 871a096..14ace55 100644 --- a/include/bw_ls1.h +++ b/include/bw_ls1.h @@ -135,7 +135,6 @@ static inline void bw_ls1_set_dc_gain_dB(bw_ls1_coeffs *BW_RESTRICT coeffs, floa * Sets the dc gain parameter to the given `value` (dB) in `coeffs`. * * Default value: `-INFINITY`. - * * }}} */ /*** Implementation ***/ diff --git a/include/bw_ls2.h b/include/bw_ls2.h new file mode 100644 index 0000000..f65b081 --- /dev/null +++ b/include/bw_ls2.h @@ -0,0 +1,311 @@ +/* + * Brickworks + * + * Copyright (C) 2022 Orastron Srl unipersonale + * + * Brickworks is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, version 3 of the License. + * + * Brickworks is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with Brickworks. If not, see . + * + * File author: Stefano D'Angelo + */ + +/*! + * module_type {{{ dsp }}} + * version {{{ 0.3.0 }}} + * requires {{{ + * bw_config bw_common bw_gain bw_math bw_mm2 bw_one_pole bw_svf + * }}} + * description {{{ + * Second-order low shelf filter (12 dB/oct) with gain asymptotically + * approaching unity as frequency increases. + * + * The quality factor can be either directly controlled via the Q parameter + * or indirectly through the slope parameter, which indicates the "shelf + * slope" as defined in the "Cookbook formulae for audio EQ biquad filter + * coefficients" by Robert Bristow-Johnson. The use_slope parameter allows + * you to choose which parameterization to use. + * }}} + * changelog {{{ + *
    + *
  • Version 0.3.0: + *
      + *
    • First release.
      • + *
    + *
    • + *
+ * }}} + */ + +#ifndef _BW_LS2_H +#define _BW_LS2_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include + +/*! api {{{ + * #### bw_ls2_coeffs + * ```>>> */ +typedef struct _bw_ls2_coeffs bw_ls2_coeffs; +/*! <<<``` + * Coefficients and related. + * + * #### bw_ls2_state + * ```>>> */ +typedef struct _bw_ls2_state bw_ls2_state; +/*! <<<``` + * Internal state and related. + * + * #### bw_ls2_init() + * ```>>> */ +static inline void bw_ls2_init(bw_ls2_coeffs *BW_RESTRICT coeffs); +/*! <<<``` + * Initializes input parameter values in `coeffs`. + * + * #### bw_ls2_set_sample_rate() + * ```>>> */ +static inline void bw_ls2_set_sample_rate(bw_ls2_coeffs *BW_RESTRICT coeffs, float sample_rate); +/*! <<<``` + * Sets the `sample_rate` (Hz) value in `coeffs`. + * + * #### bw_ls2_reset_coeffs() + * ```>>> */ +static inline void bw_ls2_reset_coeffs(bw_ls2_coeffs *BW_RESTRICT coeffs); +/*! <<<``` + * Resets coefficients in `coeffs` to assume their target values. + * + * #### bw_ls2_reset_state() + * ```>>> */ +static inline void bw_ls2_reset_state(const bw_ls2_coeffs *BW_RESTRICT coeffs, bw_ls2_state *BW_RESTRICT state); +/*! <<<``` + * Resets the given `state` to its initial values using the given `coeffs`. + * + * #### bw_ls2_update_coeffs_ctrl() + * ```>>> */ +static inline void bw_ls2_update_coeffs_ctrl(bw_ls2_coeffs *BW_RESTRICT coeffs); +/*! <<<``` + * Triggers control-rate update of coefficients in `coeffs`. + * + * #### bw_ls2_update_coeffs_audio() + * ```>>> */ +static inline void bw_ls2_update_coeffs_audio(bw_ls2_coeffs *BW_RESTRICT coeffs); +/*! <<<``` + * Triggers audio-rate update of coefficients in `coeffs`. + * + * #### bw_ls2_process1() + * ```>>> */ +static inline float bw_ls2_process1(const bw_ls2_coeffs *BW_RESTRICT coeffs, bw_ls2_state *BW_RESTRICT state, float x); +/*! <<<``` + * Processes one input sample `x` using `coeffs`, while using and updating + * `state`. Returns the corresponding output sample. + * + * #### bw_ls2_process() + * ```>>> */ +static inline void bw_ls2_process(bw_ls2_coeffs *BW_RESTRICT coeffs, bw_ls2_state *BW_RESTRICT state, const float *x, float *y, int n_samples); +/*! <<<``` + * Processes the first `n_samples` of the input buffer `x` and fills the + * first `n_samples` of the output buffer `y`, while using and updating both + * `coeffs` and `state` (control and audio rate). + * + * #### bw_ls2_set_cutoff() + * ```>>> */ +static inline void bw_ls2_set_cutoff(bw_ls2_coeffs *BW_RESTRICT coeffs, float value); +/*! <<<``` + * Sets the cutoff frequency `value` (Hz) in `coeffs`. + * + * Default value: `1e3f`. + * + * #### bw_ls2_set_Q() + * ```>>> */ +static inline void bw_ls2_set_Q(bw_mm2_coeffs *BW_RESTRICT coeffs, float value); +/*! <<<``` + * Sets the quality factor to the given `value` in `coeffs`. + * + * `value` must be equal or bigger than `0.5f`. + * + * Default value: `0.5f`. + * + * #### bw_ls2_set_dc_gain_lin() + * ```>>> */ +static inline void bw_ls2_set_dc_gain_lin(bw_ls2_coeffs *BW_RESTRICT coeffs, float value); +/*! <<<``` + * Sets the dc gain parameter to the given `value` (linear gain) in `coeffs`. + * + * Default value: `0.f`. + * + * #### bw_ls2_set_dc_gain_dB() + * ```>>> */ +static inline void bw_ls2_set_dc_gain_dB(bw_ls2_coeffs *BW_RESTRICT coeffs, float value); +/*! <<<``` + * Sets the dc gain parameter to the given `value` (dB) in `coeffs`. + * + * Default value: `-INFINITY`. + * + * #### bw_ls2_set_slope() + * ```>>> */ +static inline void bw_ls2_set_slope(bw_ls2_coeffs *BW_RESTRICT coeffs, float value); +/*! <<<``` + * Sets the shelf slope `value` in `coeffs`. + * + * Default value: `0.5f`. + * + * #### bw_ls2_set_use_slope() + * ```>>> */ +static inline void bw_ls2_set_use_slope(bw_mm2_coeffs *BW_RESTRICT coeffs, char value); +/*! <<<``` + * Sets whether the quality factor should be controlled via the slope + * parameter (`value` non-`0`) or via the Q parameter (`0`). + * + * Default value: non-`0` (use slope parameter). + * }}} */ + +/*** 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. */ + +#include +#include + +struct _bw_ls2_coeffs { + // Sub-components + bw_mm2_coeffs mm2_coeffs; + + // Coefficients + float sg; + float isg; + + // Parameters + float gain; + float Q; + float slope; + char use_slope; + int param_changed; +}; + +struct _bw_ls2_state { + bw_mm2_state mm2_state; +}; + +#define _BW_LS2_PARAM_GAIN 1 +#define _BW_LS2_PARAM_Q (1<<1) +#define _BW_LS2_PARAM_SLOPE (1<<1) + +static inline void bw_ls2_init(bw_ls2_coeffs *BW_RESTRICT coeffs) { + bw_mm2_init(&coeffs->mm2_coeffs); + coeffs->gain = 1.f; + coeffs->Q = 0.5f; + coeffs->slope = 0.5f; + coeffs->use_slope = 1; +} + +static inline void bw_ls2_set_sample_rate(bw_ls2_coeffs *BW_RESTRICT coeffs, float sample_rate) { + bw_mm2_set_sample_rate(&coeffs->mm2_coeffs, sample_rate); +} + +static inline void bw_ls2_reset_coeffs(bw_ls2_coeffs *BW_RESTRICT coeffs) { + bw_mm2_reset_coeffs(&coeffs->mm2_coeffs); + coeffs->param_changed = ~0; + bw_ls2_update_coeffs_ctrl(coeffs); +} + +static inline void bw_ls2_reset_state(const bw_ls2_coeffs *BW_RESTRICT coeffs, bw_ls2_state *BW_RESTRICT state) { + bw_mm2_reset_state(&coeffs->mm2_coeffs, &state->mm2_state); +} + +static inline void bw_ls2_update_coeffs_ctrl(bw_ls2_coeffs *BW_RESTRICT coeffs) { + if (coeffs->param_changed) { + if (coeffs->param_changed & _BW_LS2_PARAM_GAIN) { + coeffs->sg = bw_math_sqrtf_2(coeffs->gain); + coeffs->isg = bw_rcpf_2(coeffs->sg); + bw_mm2_set_coeff_x(&coeffs->mm2_coeffs, coeffs->sg); + bw_mm2_set_coeff_lp(&coeffs->mm2_coeffs, 1.f - coeffs->isg); + bw_mm2_set_coeff_hp(&coeffs->mm2_coeffs, 1.f - sg); + } + if (coeffs->use_slope) { + if (coeffs->param_changed & _BW_LS2_PARAM_SLOPE) { + const float k = coeffs->sg + coeffs->isg; + bw_mm2_set_Q(&coeffs->mm2_coeffs, bw_sqrtf_2(coeffs->slope * bw_rcpf_2(coeffs->slope + coeffs->slope + k - k * coeffs->slope))); + } + } + else { + if (coeffs->param_changed & _BW_LS2_PARAM_Q) + bw_mm2_set_Q(&coeffs->mm2_coeffs, coeffs->Q); + } + coeffs->param_changed = 0; + } + bw_mm2_update_coeffs_ctrl(&coeffs->mm2_coeffs); +} + +static inline void bw_ls2_update_coeffs_audio(bw_ls2_coeffs *BW_RESTRICT coeffs) { + bw_mm2_update_coeffs_audio(&coeffs->mm2_coeffs); +} + +static inline float bw_ls2_process1(const bw_ls2_coeffs *BW_RESTRICT coeffs, bw_ls2_state *BW_RESTRICT state, float x) { + return bw_mm2_process1(&coeffs->mm2_coeffs, &state->mm2_state, x); +} + +static inline void bw_ls2_process(bw_ls2_coeffs *BW_RESTRICT coeffs, bw_ls2_state *BW_RESTRICT state, const float *x, float *y, int n_samples) { + bw_ls2_update_coeffs_ctrl(coeffs); + for (int i = 0; i < n_samples; i++) { + bw_ls2_update_coeffs_audio(coeffs); + y[i] = bw_ls2_process1(coeffs, state, x[i]); + } +} + +static inline void bw_ls2_set_cutoff(bw_ls2_coeffs *BW_RESTRICT coeffs, float value) { + bw_mm2_set_cutoff(&coeffs->mm2_coeffs, value); +} + +static inline void bw_ls2_set_Q(bw_mm2_coeffs *BW_RESTRICT coeffs, float value) { + if (coeffs->Q != value) { + coeffs->Q = value; + coeffs->param_changed |= _BW_LS2_PARAM_Q; + } +} + +static inline void bw_ls2_set_dc_gain_lin(bw_ls2_coeffs *BW_RESTRICT coeffs, float value) { + if (coeffs->gain != value) { + coeffs->gain = value; + coeffs->param_changed |= _BW_LS2_PARAM_GAIN; + } +} + +static inline void bw_ls2_set_dc_gain_dB(bw_ls2_coeffs *BW_RESTRICT coeffs, float value) { + bw_ls2_set_dc_gain_lin(coeffs, bw_dB2linf_3(value)); +} + +static inline void bw_ls2_set_slope(bw_ls2_coeffs *BW_RESTRICT coeffs, float value) { + if (coeffs->slope != value) { + coeffs->slope = value; + coeffs->param_changed |= _BW_LS2_PARAM_SLOPE; + } +} + +static inline void bw_ls2_set_use_slope(bw_mm2_coeffs *BW_RESTRICT coeffs, char value) { + if ((coeffs->use_slope && !value) || (!coeffs->use_slope && value)) { + coeffs->use_slope = value; + coeffs->param_changed |= _BW_LS2_PARAM_Q | _BW_LS2_PARAM_SLOPE; + } +} + +#undef _BW_LS2_PARAM_GAIN +#undef _BW_LS2_PARAM_Q +#undef _BW_LS2_PARAM_S + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/include/bw_mm2.h b/include/bw_mm2.h index 567d3d8..ddb097c 100644 --- a/include/bw_mm2.h +++ b/include/bw_mm2.h @@ -21,7 +21,7 @@ /*! * module_type {{{ dsp }}} * version {{{ 0.3.0 }}} - * requires {{{ bw_config bw_common bw_gain bw_svf bw_math bw_one_pole }}} + * requires {{{ bw_config bw_common bw_gain bw_math bw_one_pole bw_svf }}} * description {{{ * Second-order multimode filter. * }}}