EnvelopeGenerator.hxx

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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
 *
 */

#ifndef _EnvelopeGenerator_
#define _EnvelopeGenerator_

#include "Processing.hxx"
#include "ProcessingData.hxx"
#include "ProcessingData.hxx"
#include "Envelope.hxx"
#include "AudioOutPort.hxx"
#include "InPort.hxx"

namespace CLAM
{


class EnvelopeGeneratorConfig: public ProcessingConfig
{
public:
        DYNAMIC_TYPE_USING_INTERFACE (EnvelopeGeneratorConfig, 4, ProcessingConfig);
        DYN_ATTRIBUTE (0, public, TData,       Duration);
        DYN_ATTRIBUTE (1, public, TData,       SampleRate);
        DYN_ATTRIBUTE (2, public, bool,        FrameEnvelopes);
        DYN_ATTRIBUTE (3, public, int,         FrameSize);

protected:
        void DefaultInit(void)
        {
                AddAll();
                UpdateData();

                SetDuration(1.0);
                SetSampleRate(44100.0);
                SetFrameEnvelopes(false);
                SetFrameSize(512);
        }
};
        
class EnvelopeGenerator: public Processing
{
private:
        EnvelopeGeneratorConfig mConfig;
        TData mX;
        TData mDX;
        bool mXFrameReset;

        InControlTmpl<EnvelopeGenerator> mEnvelopePos;

        int UpdateEnvelopePosition(TControlData val)
        {
                mX=val;
                return 0;
        }

public:
        EnvelopeGenerator(const EnvelopeGeneratorConfig& c = EnvelopeGeneratorConfig())
                :
                mEnvelopePos("EnvelopePosition",this, &EnvelopeGenerator::UpdateEnvelopePosition),
                Input("Input",this),
                Output("Output",this)
        {
                Configure(c);
        }

        const char * GetClassName() const { return "EnvelopeGenerator";}

        InPort<Envelope> Input;

        AudioOutPort   Output;

        const ProcessingConfig &GetConfig() const { return mConfig;}

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

                mXFrameReset = mConfig.GetFrameEnvelopes();
                mX = 0;
                mDX = TData(1000.)/(mConfig.GetSampleRate()*mConfig.GetDuration());

                Output.SetParams(mConfig.GetFrameSize());
                                
                return true;
        }

        void Attach(Envelope& in,Audio& out)
        {
                Input.Attach(in);
                Output.Attach(out);
        }

        bool Do(void)
        {
                bool res = Do(Input.GetData(),Output.GetData());
                Input.Consume();
                Output.Produce();
                return res;
        }

        bool Do(Envelope& in,Audio& out)
        {
                BPFTmpl<TTime,TData>   &envelope = in.GetAmplitudeBPF();
                DataArray &audio = out.GetBuffer();
                int size = audio.Size();

                for (int i=0;i<size;i++)
                {
                        audio[i] = envelope.GetValue(mX);
                        mX += mDX;
                        if (mX>1000.0) mX=1000.0;
                }
                if (mXFrameReset)
                        mX=0.0;
                return true;
        }

};
        
}

#endif