Added DaisySP

2026-04-24 14:46:05 +02:00
parent 82190216c3
commit dd63b3aed4
96 changed files with 10613 additions and 0 deletions
@@ -0,0 +1,94 @@
+/*
+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 DECIMATOR_H
+#define DECIMATOR_H
+#include <stdint.h>
+#ifdef __cplusplus
+
+namespace daisysp
+{
+/** Performs downsampling and bitcrush effects
+*/
+class Decimator
+{
+  public:
+    Decimator() {}
+    ~Decimator() {}
+    /** Initializes downsample module
+    */
+    void Init();
+
+    /** Applies downsample and bitcrush effects to input signal.
+        \return one sample. This should be called once per sample period. 
+    */
+    float Process(float input);
+
+
+    /** Sets amount of downsample 
+        Input range: 
+    */
+    inline void SetDownsampleFactor(float downsample_factor)
+    {
+        downsample_factor_ = downsample_factor;
+    }
+
+    /** Sets amount of bitcrushing 
+        Input range: 0...1.0
+    */
+    inline void SetBitcrushFactor(float bitcrush_factor)
+    {
+        bitcrush_factor_ = bitcrush_factor;
+        bits_to_crush_   = (uint32_t)(bitcrush_factor * kMaxBitsToCrush);
+        bit_overflow_
+            = 2.0f - (bitcrush_factor * 16.0f) + (float)(bits_to_crush_);
+    }
+
+    /** Sets the exact number of bits to crush and disables smooth crushing
+        0-16 bits
+    */
+    inline void SetBitsToCrush(const uint8_t &bits)
+    {
+        bits_to_crush_   = bits <= kMaxBitsToCrush ? bits : kMaxBitsToCrush;
+        smooth_crushing_ = false;
+    }
+
+    /** Sets the smooth crushing on or off
+        true/false
+    */
+    inline void SetSmoothCrushing(bool smooth_crushing)
+    {
+        smooth_crushing_ = smooth_crushing;
+    }
+
+    /** Returns current setting of smooth crushing
+    */
+    inline bool GetSmoothCrushing() { return smooth_crushing_; }
+    /** Returns current setting of downsample
+    */
+    inline float GetDownsampleFactor() { return downsample_factor_; }
+    /** Returns current setting of bitcrush
+    */
+    inline float GetBitcrushFactor() { return bitcrush_factor_; }
+    /** Returns current bitcrush setting in bits
+    */
+    inline int GetBitsToCrush() { return bits_to_crush_; }
+
+  private:
+    const uint8_t kMaxBitsToCrush = 16;
+    float         downsample_factor_, bitcrush_factor_;
+    uint32_t      bits_to_crush_;
+    float         downsampled_, bitcrushed_;
+    uint32_t      inc_, threshold_;
+    bool          smooth_crushing_;
+    float         bit_overflow_;
+};
+} // namespace daisysp
+#endif
+#endif