83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/**
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* @author Bojan MARKOVIC
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* @author Edouard DUPIN
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* @copyright 2006, ChunkWare Music Software, OPEN-SOURCE
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* @license BSD-1 (see license file)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* * The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __AUDIO_ALGO_CHUNKWARE_ATT_REL_ENVELOPE_H__
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#define __AUDIO_ALGO_CHUNKWARE_ATT_REL_ENVELOPE_H__
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#include "EnvelopeDetector.h"
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namespace audio {
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namespace algo {
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namespace chunkware {
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//-------------------------------------------------------------
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// attack/release envelope
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//-------------------------------------------------------------
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class AttRelEnvelope {
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public:
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AttRelEnvelope(double att_ms = 10.0,
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double rel_ms = 100.0,
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double sampleRate = 44100.0);
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virtual ~AttRelEnvelope() {}
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// attack time constant
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virtual void setAttack(double ms);
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virtual double getAttack() const {
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return att_.getTc();
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}
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// release time constant
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virtual void setRelease(double ms);
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virtual double getRelease() const {
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return rel_.getTc();
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}
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// sample rate dependencies
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virtual void setSampleRate(double sampleRate);
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virtual double getSampleRate() const {
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return att_.getSampleRate();
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}
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// runtime function
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void run(double in, double &state) {
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/* assumes that:
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* positive delta = attack
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* negative delta = release
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* good for linear & log values
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*/
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if (in > state) {
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// attack
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att_.run(in, state);
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} else {
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// release
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rel_.run(in, state);
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}
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}
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private:
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EnvelopeDetector att_;
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EnvelopeDetector rel_;
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};
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}
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}
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}
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#endif
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