Added DaisySP

daisysp/Effects/tremolo.h

@@ -0,0 +1,68 @@
+/*
+Copyright (c) 2020 Electrosmith, Corp
+
+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_TREMOLO_H
+#define DSY_TREMOLO_H
+
+#include <stdint.h>
+#ifdef __cplusplus
+
+#include <math.h>
+#include "Synthesis/oscillator.h"
+
+/** @file tremolo.h */
+
+namespace daisysp
+{
+/**  
+    @brief Tremolo effect.
+    @author Ben Sergentanis
+    @date Jan 2021
+    Based on https://christianfloisand.wordpress.com/2012/04/18/coding-some-tremolo/ \n
+*/
+class Tremolo
+{
+  public:
+    Tremolo() {}
+    ~Tremolo() {}
+
+    /** Initializes the module
+        \param sample_rate  The sample rate of the audio engine being run.
+    */
+    void Init(float sample_rate);
+
+    /** 
+     \param in Input sample.
+     \return Next floating point sample.
+    */
+    float Process(float in);
+
+    /** Sets the tremolo rate.
+       \param freq Tremolo freq in Hz.
+    */
+    void SetFreq(float freq);
+
+    /** Shape of the modulating lfo 
+        \param waveform Oscillator waveform. Use Oscillator::WAVE_SIN for example.
+    */
+    void SetWaveform(int waveform);
+
+    /** How much to modulate your volume.
+        \param depth Works 0-1.
+    */
+    void SetDepth(float depth);
+
+
+  private:
+    float      sample_rate_, dc_os_;
+    Oscillator osc_;
+};
+} // namespace daisysp
+#endif
+#endif