SimpleComp.cpp

/*
 *  Simple Compressor (source)
 *
 *  File        : SimpleComp.cpp
 *  Library     : SimpleSource
 *  Version     : 1.12
 *  Implements  : SimpleComp, SimpleCompRms
 *
 *  © 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 "SimpleComp.h"
 
namespace chunkware_simple
{
    //-------------------------------------------------------------
    // simple compressor
    //-------------------------------------------------------------
    SimpleComp::SimpleComp()
        : AttRelEnvelope(10.0, 100.0)
        , threshdB_(0.0)
        , ratio_(1.0)
        , envdB_(DC_OFFSET)
        , makeUpGain_(1.0)
    {
    }
 
    //-------------------------------------------------------------
    void SimpleComp::setThresh(double dB)
    {
        threshdB_ = dB;
    }
 
    //-------------------------------------------------------------
    void SimpleComp::setRatio(double ratio)
    {
        assert(ratio > 0.0);
        ratio_ = ratio;
    }
 
    //-------------------------------------------------------------
    void SimpleComp::setMakeUpGain(double gain)
    {
        makeUpGain_ = gain;
    }
 
    //-------------------------------------------------------------
    void SimpleComp::initRuntime(void)
    {
        envdB_ = DC_OFFSET;
    }
 
    //-------------------------------------------------------------
    // simple compressor with RMS detection
    //-------------------------------------------------------------
    SimpleCompRms::SimpleCompRms()
        : ave_(5.0)
        , aveOfSqrs_(DC_OFFSET)
    {
    }
 
    //-------------------------------------------------------------
    void SimpleCompRms::setSampleRate(double sampleRate)
    {
        SimpleComp::setSampleRate(sampleRate);
        ave_.setSampleRate(sampleRate);
    }
 
    //-------------------------------------------------------------
    void SimpleCompRms::setWindow(double ms)
    {
        ave_.setTc(ms);
    }
 
    //-------------------------------------------------------------
    void SimpleCompRms::initRuntime(void)
    {
        SimpleComp::initRuntime();
        aveOfSqrs_ = DC_OFFSET;
    }
 
}   // end namespace chunkware_simple