refactor: Move chunkware to third_party

third_party/chunkware_dsp/SimpleEnvelope.cpp

@@ -0,0 +1,99 @@
+/*
+ *  Simple Envelope Detectors (source)
+ *
+ *  File        : SimpleEnvelope.cpp
+ *  Library     : SimpleSource
+ *  Version     : 1.12
+ *  Implements  : EnvelopeDetector, AttRelEnvelope
+ *
+ *  2006, ChunkWare Music Software, OPEN-SOURCE
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a
+ *  copy of this software and associated documentation files (the "Software"),
+ *  to deal in the Software without restriction, including without limitation
+ *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ *  and/or sell copies of the Software, and to permit persons to whom the
+ *  Software is furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in
+ *  all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ *  DEALINGS IN THE SOFTWARE.
+ */
+
+#include "SimpleEnvelope.h"
+
+namespace chunkware_simple
+{
+    //-------------------------------------------------------------
+    // envelope detector
+    //-------------------------------------------------------------
+    EnvelopeDetector::EnvelopeDetector(double ms, double sampleRate)
+    {
+        assert(sampleRate > 0.0);
+        assert(ms > 0.0);
+        sampleRate_ = sampleRate;
+        ms_ = ms;
+
+        // setCoef();
+        // TODO: KB avoid virtual function call in ctor
+        coef_ = exp(-1000.0 / (ms_ * sampleRate_));
+    }
+
+    //-------------------------------------------------------------
+    void EnvelopeDetector::setTc(double ms)
+    {
+        assert(ms > 0.0);
+        ms_ = ms;
+        setCoef();
+    }
+
+    //-------------------------------------------------------------
+    void EnvelopeDetector::setSampleRate(double sampleRate)
+    {
+        assert(sampleRate > 0.0);
+        sampleRate_ = sampleRate;
+        setCoef();
+    }
+
+    //-------------------------------------------------------------
+    void EnvelopeDetector::setCoef(void)
+    {
+        coef_ = exp(-1000.0 / (ms_ * sampleRate_));
+    }
+
+    //-------------------------------------------------------------
+    // attack/release envelope
+    //-------------------------------------------------------------
+    AttRelEnvelope::AttRelEnvelope(double att_ms, double rel_ms, double sampleRate)
+        : att_(att_ms, sampleRate)
+        , rel_(rel_ms, sampleRate)
+    {
+    }
+
+    //-------------------------------------------------------------
+    void AttRelEnvelope::setAttack(double ms)
+    {
+        att_.setTc(ms);
+    }
+
+    //-------------------------------------------------------------
+    void AttRelEnvelope::setRelease(double ms)
+    {
+        rel_.setTc(ms);
+    }
+
+    //-------------------------------------------------------------
+    void AttRelEnvelope::setSampleRate(double sampleRate)
+    {
+        att_.setSampleRate(sampleRate);
+        rel_.setSampleRate(sampleRate);
+    }
+
+}   // end namespace chunkware_simple