Added DaisySP

2026-04-24 14:46:05 +02:00
parent 82190216c3
commit dd63b3aed4
96 changed files with 10613 additions and 0 deletions
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+/*
+Copyright (c) 2020 Electrosmith, Corp, Emilie Gillet
+
+Use of this source code is governed by an MIT-style
+license that can be found in the LICENSE file or at
+https://opensource.org/licenses/MIT.
+*/
+
+#pragma once
+#ifndef DSY_STRING_H
+#define DSY_STRING_H
+
+#include <stdint.h>
+
+#include "Dynamics/crossfade.h"
+#include "Utility/dcblock.h"
+#include "Utility/delayline.h"
+#include "Filters/onepole.h"
+
+#ifdef __cplusplus
+
+/** @file KarplusString.h */
+
+namespace daisysp
+{
+/**  
+       @brief Comb filter / KS string.
+       @author Ben Sergentanis
+       @date Jan 2021 
+       "Lite" version of the implementation used in Rings \n \n 
+       Ported from pichenettes/eurorack/plaits/dsp/oscillator/formant_oscillator.h \n
+       to an independent module. \n
+       Original code written by Emilie Gillet in 2016. \n
+*/
+class String
+{
+  public:
+    String() {}
+    ~String() {}
+
+    /** Initialize the module.
+        \param sample_rate Audio engine sample rate
+    */
+    void Init(float sample_rate);
+
+    /** Clear the delay line */
+    void Reset();
+
+    /** Get the next floating point sample
+        \param in Signal to excite the string.
+    */
+    float Process(const float in);
+
+    /** Set the string frequency.
+        \param freq Frequency in Hz
+    */
+    void SetFreq(float freq);
+
+    /** Set the string's behavior.
+        \param -1 to 0 is curved bridge, 0 to 1 is dispersion.
+    */
+    void SetNonLinearity(float non_linearity_amount);
+
+    /** Set the string's overall brightness
+        \param Works 0-1.
+    */
+    void SetBrightness(float brightness);
+
+    /** Set the string's decay time.
+        \param damping Works 0-1.
+    */
+    void SetDamping(float damping);
+
+
+  private:
+    static constexpr size_t kDelayLineSize = 1024;
+
+    enum StringNonLinearity
+    {
+        NON_LINEARITY_CURVED_BRIDGE,
+        NON_LINEARITY_DISPERSION
+    };
+
+    template <String::StringNonLinearity non_linearity>
+    float ProcessInternal(const float in);
+
+    DelayLine<float, kDelayLineSize>     string_;
+    DelayLine<float, kDelayLineSize / 4> stretch_;
+
+    float frequency_, non_linearity_amount_, brightness_, damping_;
+
+    float sample_rate_;
+
+    OnePole iir_damping_filter_;
+
+    DcBlock dc_blocker_;
+
+    CrossFade crossfade_;
+
+    float dispersion_noise_;
+    float curved_bridge_;
+
+    // Very crappy linear interpolation upsampler used for low pitches that
+    // do not fit the delay line. Rarely used.
+    float src_phase_;
+    float out_sample_[2];
+};
+} // namespace daisysp
+#endif
+#endif