WaveGenerator.cxx

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/*
 * Copyright (c) 2001-2004 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 "OSDefines.hxx"
#include "WaveGenerator.hxx"
#include "CLAM_Math.hxx"

namespace CLAM {

        void WaveGeneratorConfig::DefaultInit()
        {
                AddAll();
                UpdateData();
                SetFrequency(440.0);
                SetAmplitude(1.0);
                SetPhase(0.0);
                SetSampleRate(44100);
                SetFrameSize(512);
                SetWaveType(EWaveType::eSine);
        }


        template<> 
        inline TData WaveFunctor<WaveGenerator::EWaveType_eSine>::operator()(TTime x,TData amplitude)
        {
                return amplitude * sin(x);
        }




        WaveGenerator::WaveGenerator()
                : Output("Output",this)
        {
                Configure(WaveGeneratorConfig());
        };

        WaveGenerator::WaveGenerator(const WaveGeneratorConfig &c)
                : Output("Output",this)
        { 
                Configure(c);
        };

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

                mAmplitude = mConfig.GetAmplitude();

                TData samples_per_period = mConfig.GetSampleRate() / mConfig.GetFrequency();

                mXDelta =  2.0 * M_PI / samples_per_period;

                mXPos = fmod( TData(mConfig.GetPhase()), TData(2 * M_PI) );

                mType = mConfig.GetWaveType();
                
                Output.SetSize(mConfig.GetFrameSize());

                return true;
        }

        WaveGenerator::~WaveGenerator()
        {
        }

        bool WaveGenerator::Do(Audio& out)
        {
                switch(mType)
                {
                case EWaveType::eSine:

                        FillBuffer< EWaveType_eSine > ( out.GetBuffer(), *this );
                        break;
                default:
                        return false;
                }
                return true;
        }


        bool WaveGenerator::Do(void)
        {
                bool res = Do(Output.GetData());
                Output.Produce();
                return res;
        }


}