ADSR.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 __ADSR__
#define __ADSR__

#include "Processing.hxx"
#include "ProcessingData.hxx"
#include "Audio.hxx"
#include "OSDefines.hxx"
#include "InControl.hxx"
#include "AudioOutPort.hxx"
#include "OutControl.hxx"

namespace CLAM
{
        class ADSRConfig: public ProcessingConfig
        {
        public:
                DYNAMIC_TYPE_USING_INTERFACE (ADSRConfig, 5, ProcessingConfig);
                DYN_ATTRIBUTE (0, public, TData, AttackTime);
                DYN_ATTRIBUTE (1, public, TData, DecayTime);
                DYN_ATTRIBUTE (2, public, TData, SustainLevel);
                DYN_ATTRIBUTE (3, public, TData , ReleaseTime);
                DYN_ATTRIBUTE (4, public, TData , SampleRate);
        protected:
                void DefaultInit(void);
        };

        class ADSR: public Processing
        {
        public:
                typedef ADSRConfig Config;
                AudioOutPort mOutput;
                enum Status {
                Attack = 0,
                Decay = 1,
                Sustain = 2,
                Release = 3,
                Done = 4,
                };

        private:
                FloatInControl         mAmplitude;
                ADSRConfig             mConfig;
                TControlData           mAmpValue;
                TData                  mAttackTime;
                TData                  mDecayTime;
                TData                  mSustainLevel;
                TData                  mReleaseTime;
                TData                  mSamplingRate;
                TData                  mLevel;
                TData                  mDLevel;
                Status                 mStatus;
                FloatOutControl             mState;

        protected:
                void HandleAttack();

                void HandleDecay();

                void HandleRelease();
                
                void HandleAmplitude()
                {
                        if ( mAmpValue > 0 )
                                HandleAttack();
                                
                        if ( mAmpValue == 0 )
                                HandleRelease();                        
                }

                void UpdateState()
                {
                        if( mStatus == Done )
                                mState.SendControl( 0 );  // Available instrument
                        else
                                mState.SendControl( 1 );  // Busy intrument
                }

                void UpdateAmp( TControlData value )
                {
                        mAmpValue = value ;
                        HandleAmplitude();
                }

        public:
                ADSR( const ADSRConfig& c = Config() );
                ~ADSR(){}

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

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

                bool ConcreteConfigure( const ProcessingConfig& c );

                // Unsupervised mode 
                bool Do(void); // { return true; }

                bool Do( Audio& out);

        };
}

#endif