AudioAmplifier.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 _AudioAmplifier_
#define _AudioAmplifier_

#include "Processing.hxx"
#include "ProcessingConfig.hxx"
#include "Audio.hxx"
#include "AudioInPort.hxx"
#include "AudioOutPort.hxx"
#include "InControl.hxx"

namespace CLAM{

        class AudioAmplifierConfig : public ProcessingConfig
        {
        public:
                DYNAMIC_TYPE_USING_INTERFACE( AudioAmplifierConfig, 1, ProcessingConfig );
                DYN_ATTRIBUTE( 0, public, double, MaxGain );

        protected:
                void DefaultInit();
        };


        class AudioAmplifier: public Processing
        {       
                const char *GetClassName() const { return "AudioAmplifier"; }
                
                AudioInPort mInputAudio;
                AudioOutPort mOutputAudio;

                InControl mInputControl; 


        public:

                AudioAmplifier()
                        :
                        mInputAudio("Input Audio",this ),
                        mOutputAudio("Audio Output",this),

                        mInputControl("Gain", this)
                {
                        Configure( mConfig );
                }

                ~AudioAmplifier() {}

                bool Do()
                {
                        bool result = Do( mInputAudio.GetAudio(), mOutputAudio.GetAudio() );

                        mInputAudio.Consume(); 
                        mOutputAudio.Produce();

                        return result;
                }
        
                bool Do(const Audio& in, Audio& out)
                {
                        int size = in.GetSize();

                        TData gain = mInputControl.GetLastValue();

                        const DataArray& inb = in.GetBuffer();
                        DataArray& outb = out.GetBuffer();

                        for (int i=0;i<size;i++) 
                        {
                                outb[i] = inb[i]*gain;
                        }

                        return true;
                }

                typedef AudioAmplifierConfig Config;


        protected:

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

                bool ConcreteConfigure(const ProcessingConfig& config) {

                        CopyAsConcreteConfig( mConfig, config );

                        double max_gain = mConfig.GetMaxGain();
                        mInputControl.SetBounds(0.,max_gain);
                        mInputControl.SetDefaultValue(1.);
                        mInputControl.DoControl(1.);
                        return true;
                }


        private:

                Config mConfig;
        };      
        
};//namespace CLAM

#endif // _AudioAmplifier_

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