Added DaisySP

daisysp/Synthesis/variableshapeosc.h

@@ -0,0 +1,95 @@
+/*
+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_VARIABLESHAPEOSCILLATOR_H
+#define DSY_VARIABLESHAPEOSCILLATOR_H
+
+#include <stdint.h>
+#ifdef __cplusplus
+
+/** @file variableshapeosc.h */
+
+namespace daisysp
+{
+/**         
+       @brief Variable Waveshape Oscillator. 
+       @author Ben Sergentanis
+       @date Dec 2020 
+       Continuously variable waveform. \n \n
+       Ported from pichenettes/eurorack/plaits/dsp/oscillator/variable_shape_oscillator.h \n 
+       \n to an independent module. \n
+       Original code written by Emilie Gillet in 2016. \n
+*/
+class VariableShapeOscillator
+{
+  public:
+    VariableShapeOscillator() {}
+    ~VariableShapeOscillator() {}
+
+    /** Initialize the oscillator
+        \param sample_rate Audio engine sample rate
+    */
+    void Init(float sample_rate);
+
+    /** Get next sample
+    */
+    float Process();
+
+    /** Set master freq.
+        \param frequency Freq in Hz.
+    */
+    void SetFreq(float frequency);
+
+    /** Set pulse width / saw, ramp, tri.
+        \param pw PW when shape is square. Saw, ramp, tri otherwise.
+    */
+    void SetPW(float pw);
+
+    /** Switch from saw/ramp/tri to square.
+        \param waveshape 0 is saw/ramp/tri, 1 is square.
+    */
+    void SetWaveshape(float waveshape);
+
+    /** Whether or not to sync to the sync oscillator
+        \param enable_sync True to turn sync on.
+    */
+    void SetSync(bool enable_sync);
+
+    /** Set sync oscillator freq.
+        \param frequency Freq in Hz.
+    */
+    void SetSyncFreq(float frequency);
+
+  private:
+    float ComputeNaiveSample(float phase,
+                             float pw,
+                             float slope_up,
+                             float slope_down,
+                             float triangle_amount,
+                             float square_amount);
+
+    float sample_rate_;
+    bool  enable_sync_;
+
+    // Oscillator state.
+    float master_phase_;
+    float slave_phase_;
+    float next_sample_;
+    float previous_pw_;
+    bool  high_;
+
+    // For interpolation of parameters.
+    float master_frequency_;
+    float slave_frequency_;
+    float pw_;
+    float waveshape_;
+};
+} // namespace daisysp
+#endif
+#endif