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                 typedef ADSRConfig Config;
00052                 AudioOutPort mOutput;
00053                 enum Status {
00054                 Attack = 0,
00055                 Decay = 1,
00056                 Sustain = 2,
00057                 Release = 3,
00058                 Done = 4,
00059                 };
00060 
00061         private:
00062                 FloatInControl         mAmplitude;
00063                 ADSRConfig             mConfig;
00064                 TControlData           mAmpValue;
00065                 TData                  mAttackTime;
00066                 TData                  mDecayTime;
00067                 TData                  mSustainLevel;
00068                 TData                  mReleaseTime;
00069                 TData                  mSamplingRate;
00070                 TData                  mLevel;
00071                 TData                  mDLevel;
00072                 Status                 mStatus;
00073                 FloatOutControl             mState;
00074 
00075         protected:
00076                 void HandleAttack();
00077 
00078                 void HandleDecay();
00079 
00080                 void HandleRelease();
00081                 
00082                 void HandleAmplitude()
00083                 {
00084                         if ( mAmpValue > 0 )
00085                                 HandleAttack();
00086                                 
00087                         if ( mAmpValue == 0 )
00088                                 HandleRelease();                        
00089                 }
00090 
00091                 void UpdateState()
00092                 {
00093                         if( mStatus == Done )
00094                                 mState.SendControl( 0 );  // Available instrument
00095                         else
00096                                 mState.SendControl( 1 );  // Busy intrument
00097                 }
00098 
00099                 void UpdateAmp( TControlData value )
00100                 {
00101                         mAmpValue = value ;
00102                         HandleAmplitude();
00103                 }
00104 
00105         public:
00106                 ADSR( const ADSRConfig& c = Config() );
00107                 ~ADSR(){}
00108 
00109                 const char * GetClassName() const {return "ADSR";}
00110 
00111                 const ProcessingConfig &GetConfig() const { return mConfig; }
00112 
00113                 bool ConcreteConfigure( const ProcessingConfig& c );
00114 
00115                 // Unsupervised mode 
00116                 bool Do(void); // { return true; }
00117 
00118                 bool Do( Audio& out);
00119 
00120         };
00121 }
00122 
00123 #endif
00124 
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