Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/AimHCL.h
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00001 /*
00002 ** Copyright (C) 1998-2006 George Tzanetakis <gtzan@cs.uvic.ca>
00003 **
00004 ** This program is free software; you can redistribute it and/or modify
00005 ** it under the terms of the GNU General Public License as published by
00006 ** the Free Software Foundation; either version 2 of the License, or
00007 ** (at your option) any later version.
00008 **
00009 ** This program is distributed in the hope that it will be useful,
00010 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012 ** GNU General Public License for more details.
00013 **
00014 ** You should have received a copy of the GNU General Public License
00015 ** along with this program; if not, write to the Free Software
00016 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00017 */
00018 
00019 #ifndef MARSYAS_AIMHCL_H
00020 #define MARSYAS_AIMHCL_H
00021 
00022 #include <marsyas/system/MarSystem.h>
00023 
00024 // sness - TODO - Eventually make these realvecs.  However, in the
00025 // existing code there is quite a bit of stuff that involves STL
00026 // methods, so I thought it would be safer to use STL for now.
00027 #include <vector>
00028 
00029 namespace Marsyas
00030 {
00046 class marsyas_EXPORT AimHCL: public MarSystem
00047 {
00048 private:
00049   void myUpdate(MarControlPtr sender);
00050 
00051   // Reset all internal state variables to their initial values
00052   void ResetInternal();
00053 
00054   // Prepare the module
00055   bool InitializeInternal();
00056 
00057   // Does the MarSystem need initialization?
00058   bool is_initialized;
00059 
00060   // What changes cause it to need initialization?
00061   mrs_real initialized_lowpass_cutoff;
00062 
00063   // Does the MarSystem need reset?
00064   bool is_reset;
00065 
00066   // What changes cause it to need a reset?
00067   mrs_natural reseted_inobservations;
00068   mrs_real reseted_lowpass_order;
00069 
00070   MarControlPtr ctrl_do_lowpass_;     // Do lowpass filtering?
00071   MarControlPtr ctrl_do_log_;         // Do log compression?
00072   MarControlPtr ctrl_lowpass_cutoff_; // Cutoff frequency for lowpass filter
00073   MarControlPtr ctrl_lowpass_order_;  // Order of Lowpass Filter
00074 
00075   // int channel_count_;  // Internal record of the number of channels in the input
00076   double time_constant_;  // Time constant corresponsing to the lowpass filter cutoff freqency
00077 
00078   // Lowpass filter state variables
00079   double xn_;
00080   double yn_;
00081   std::vector<std::vector<double> > yns_;
00082 
00083 public:
00084   AimHCL(std::string name);
00085 
00086   ~AimHCL();
00087   MarSystem* clone() const;
00088   void addControls();
00089 
00090   void myProcess(realvec& in, realvec& out);
00091 };
00092 
00093 }//namespace marsyas
00094 
00095 #endif