Added DaisySP

daisysp/Effects/decimator.cpp

@@ -0,0 +1,46 @@
+#include "decimator.h"
+
+using namespace daisysp;
+
+void Decimator::Init()
+{
+    downsample_factor_ = 1.0f;
+    bitcrush_factor_   = 0.0f;
+    downsampled_       = 0.0f;
+    bitcrushed_        = 0.0f;
+    inc_               = 0;
+    threshold_         = 0;
+    smooth_crushing_   = false;
+    bit_overflow_      = 1.0f;
+}
+
+float Decimator::Process(float input)
+{
+    int32_t temp;
+    //downsample
+    threshold_ = (uint32_t)((downsample_factor_ * downsample_factor_) * 96.0f);
+    inc_ += 1;
+    if(inc_ > threshold_)
+    {
+        inc_         = 0;
+        downsampled_ = input;
+    }
+
+    //bitcrush
+    if(smooth_crushing_)
+    {
+        temp = (int32_t)(downsampled_ * 65536.0f * bit_overflow_);
+        temp >>= bits_to_crush_ + 1; // shift off
+        temp <<= bits_to_crush_ + 1; // move back with zeros
+        bitcrushed_ = (float)temp / (65536.0f * bit_overflow_);
+    }
+    else
+    {
+        temp = (int32_t)(downsampled_ * 65536.0f);
+        temp >>= bits_to_crush_; // shift off
+        temp <<= bits_to_crush_; // move back with zeros
+        bitcrushed_ = (float)temp / 65536.0f;
+    }
+
+    return bitcrushed_;
+}