ADSR.hxx

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00001 /*
00002  * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
00003  *                         UNIVERSITAT POMPEU FABRA
00004  *
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License as published by
00008  * the Free Software Foundation; either version 2 of the License, or
00009  * (at your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this program; if not, write to the Free Software
00018  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00019  *
00020  */
00021 
00022 #ifndef __ADSR__
00023 #define __ADSR__
00024 
00025 #include "Processing.hxx"
00026 #include "ProcessingData.hxx"
00027 #include "Audio.hxx"
00028 #include "OSDefines.hxx"
00029 #include "InControl.hxx"
00030 #include "AudioOutPort.hxx"
00031 #include "OutControl.hxx"
00032 
00033 namespace CLAM
00034 {
00035         class ADSRConfig: public ProcessingConfig
00036         {
00037         public:
00038                 DYNAMIC_TYPE_USING_INTERFACE (ADSRConfig, 5, ProcessingConfig);
00039                 DYN_ATTRIBUTE (0, public, TData, AttackTime);
00040                 DYN_ATTRIBUTE (1, public, TData, DecayTime);
00041                 DYN_ATTRIBUTE (2, public, TData, SustainLevel);
00042                 DYN_ATTRIBUTE (3, public, TData , ReleaseTime);
00043                 DYN_ATTRIBUTE (4, public, TData , SampleRate);
00044         protected:
00045                 void DefaultInit(void);
00046         };
00047 
00048         class ADSR: public Processing
00049         {
00050         public:
00051                 AudioOutPort mOutput;
00052                 enum Status {
00053                 Attack = 0,
00054                 Decay = 1,
00055                 Sustain = 2,
00056                 Release = 3,
00057                 Done = 4,
00058                 };
00059 
00060         private:
00061                 InControlTmpl< ADSR >  mAmplitude;
00062                 ADSRConfig             mConfig;
00063                 TControlData           mAmpValue;
00064                 TData                  mAttackTime;
00065                 TData                  mDecayTime;
00066                 TData                  mSustainLevel;
00067                 TData                  mReleaseTime;
00068                 TData                  mSamplingRate;
00069                 TData                  mLevel;
00070                 TData                  mDLevel;
00071                 Status                 mStatus;
00072                 OutControl             mState;
00073 
00074         protected:
00075                 void HandleAttack(void);
00076 
00077                 void HandleDecay(void);
00078 
00079                 void HandleRelease(void);
00080                 
00081                 void HandleAmplitude(void)
00082                 {
00083                         if ( mAmpValue > 0 )
00084                                 HandleAttack();
00085                                 
00086                         if ( mAmpValue == 0 )
00087                                 HandleRelease();                        
00088                 }
00089 
00090                 void UpdateState(void)
00091                 {
00092                         if( mStatus == Done )
00093                                 mState.SendControl( 0 );  // Available instrument
00094                         else
00095                                 mState.SendControl( 1 );  // Busy intrument
00096                 }
00097 
00098                 int UpdateAmp( TControlData value )
00099                 {
00100                         mAmpValue = value ;
00101                         HandleAmplitude();
00102                         return 0;
00103                 }
00104 
00105         public:
00106 
00107                 ADSR();
00108 
00109                 ADSR( const ADSRConfig& c );
00110 
00111                 ~ADSR(){}
00112 
00113                 const char * GetClassName() const {return "ADSR";}
00114 
00115                 const ProcessingConfig &GetConfig() const { return mConfig; }
00116 
00117                 bool ConcreteConfigure( const ProcessingConfig& c );
00118 
00119                 // Unsupervised mode 
00120                 bool Do(void); // { return true; }
00121 
00122                 bool Do( Audio& out);
00123 
00124         };
00125 }
00126 
00127 #endif
00128 

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