Oscillator.cxx

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/*
 * Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG)
 *                         UNIVERSITAT POMPEU FABRA
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include "Oscillator.hxx"
#include "ProcessingFactory.hxx"


namespace CLAM
{

namespace Hidden
{
        static const char * metadata[] = {
                "key", "Oscillator",
                "category", "Generators",
                "description", "Oscillator",
                0
        };
        static FactoryRegistrator<ProcessingFactory, Oscillator> reg = metadata;
}

void OscillatorConfig::DefaultInit(void)
{
        AddFrequency();
        AddAmplitude();
        AddModIndex();
        AddPhase();
        AddSamplingRate();
        
        UpdateData();

        SetFrequency(440.0);
        SetAmplitude(1.0);
        SetModIndex(1.0);
        SetPhase(0.0);
        SetSamplingRate( 44100 );
}


Oscillator::Oscillator(const OscillatorConfig& c )
        : mInputPhaseMod("Input Phase Modulation", this )
        , mInputFreqMod("Input Frequency Modulation", this )
        , mModIdxUpdated( false )
        , mModIdxCtl("ModIndex", this, &Oscillator::UpdateModIdx )
{       

        SimpleOscillatorConfig simpleCfg;
        simpleCfg.SetFrequency( c.GetFrequency() );
        simpleCfg.SetAmplitude( c.GetAmplitude() );
        simpleCfg.SetSamplingRate( c.GetSamplingRate() );

        Configure( c );
}

Oscillator::~Oscillator()
{
}

bool Oscillator::ConcreteConfigure( const ProcessingConfig& c )
{
        CopyAsConcreteConfig(mConfig, c);


        mAmp = mConfig.GetAmplitude();
        mPhase = mConfig.GetPhase(); // TEMP HACK  (See also constructor
        mModIndex = mConfig.GetModIndex();
        mSamplingRate = mConfig.GetSamplingRate();
        mDeltaPhase = TData(2.*PI*mConfig.GetFrequency()/mSamplingRate);

        return true;
}

bool Oscillator::Do()
{
        bool res =Do(mInputFreqMod.GetAudio(),mInputPhaseMod.GetAudio(),mOutput.GetAudio());
        mInputFreqMod.Consume();
        mInputPhaseMod.Consume();
        mOutput.Produce();
        return res;
}

bool Oscillator::Do( const Audio& pitchModIn, const Audio& phaseModIn, Audio& out )
{
        if( !AbleToExecute() ) return true;

        ApplyControls();

        TData* ptr = out.GetBuffer().GetPtr();
        TData* pitchModptr = pitchModIn.GetBuffer().GetPtr();
        TData* phaseModptr = phaseModIn.GetBuffer().GetPtr();
        
        for (int i=0;i<out.GetSize();i++)
        {
                (*ptr++) = mAmp * TData(sin(mPhase + mModIndex*(*phaseModptr++)));
                mPhase += mDeltaPhase*(*pitchModptr++);
                
                if (mPhase>2.*PI) 
                        mPhase-=TData(2.*PI);
                
                if (mPhase<0) 
                        mPhase+=TData(2.*PI);
        }

        return true;
}

bool Oscillator::Do( const Audio& pitchModIn, const int& dum, Audio& out )
{
        if( !AbleToExecute() ) return true;

        ApplyControls();

        TData* ptr = out.GetBuffer().GetPtr();
        TData* pitchModptr = pitchModIn.GetBuffer().GetPtr();
        
        for (int i=0;i<out.GetSize();i++)
        {
                (*ptr++) = mAmp * TData(sin(mPhase));
                mPhase += mDeltaPhase*(*pitchModptr++);
                
                if (mPhase>TData(2.*PI) )
                        mPhase-=TData(2.*PI);
                
                if (mPhase<0) 
                        mPhase+=TData(2.*PI);
        }
        return true;
}

bool Oscillator::Do( const int& dum, const Audio& phaseModIn, Audio& out )
{
        if( !AbleToExecute() ) return true;

        ApplyControls();

        TData* ptr = out.GetBuffer().GetPtr();
        TData* phaseModptr = phaseModIn.GetBuffer().GetPtr();
        
        for (int i=0;i<out.GetSize();i++)
        {
                (*ptr++) = mAmp * TData(sin(mPhase + mModIndex*(*phaseModptr++)));
                mPhase += mDeltaPhase;
                
                if (mPhase>TData(2.*PI) )
                        mPhase-=TData(2.*PI);
                        
                if (mPhase<0) 
                        mPhase+=TData(2.*PI);
        }
        
        return true;
}

void Oscillator::UpdateModIdx( TControlData value )
{
        mModIdxUpdated = true;
}


} // namespace CLAM