libs/Music/Algorithm.h

   1 // Copyright 2004 "Gilles Degottex"
   2
   3 // This file is part of "Music"
   4
   5 // "Music" is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU Lesser General Public License as published by
   7 // the Free Software Foundation; either version 2.1 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // "Music" is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13 // GNU Lesser General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU Lesser General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18
  19
  20 #ifndef _Algorithm_h_
  21 #define _Algorithm_h_
  22
  23 #include <list>
  24 #include <vector>
  25 #include <deque>
  26 #include <iostream>
  27 using namespace std;
  28 #include "Music.h"
  29
  30 namespace Music
  31 {
  32         class Algorithm : public SettingsListener
  33         {
  34                 static list<Algorithm*> s_algos;
  35
  36           protected:
  37                 double m_amplitude_treshold;
  38                 double m_max_amplitude;
  39
  40                 virtual void samplingRateChanged()                                      {cerr<<__FILE__<<":"<<__LINE__<<" Algorithm::samplingRateChanged Not Yet Implemented"<<endl;}
  41                 virtual void AFreqChanged()                                                     {cerr<<__FILE__<<":"<<__LINE__<<" Algorithm::AFreqChanged Not Yet Implemented"<<endl;}
  42                 virtual void semitoneBoundsChanged()                            {cerr<<__FILE__<<":"<<__LINE__<<" Algorithm::semitoneBoundsChanged Not Yet Implemented"<<endl;}
  43
  44           public:
  45                 Algorithm();
  46
  47                 inline double getAmplitudeTreshold()                            {return m_amplitude_treshold;}
  48                 inline void setAmplitudeTreshold(double t)                      {m_amplitude_treshold=t;}
  49                 inline double getMaxAmplitude()                                         {return m_max_amplitude;}
  50
  51                 virtual int getSampleAlgoLatency() const =0;
  52                 virtual double getAlgoLatency() const                           {return double(getSampleAlgoLatency())/GetSamplingRate();}
  53
  54                 virtual void apply(const deque<double>& buff)=0;
  55                 virtual bool hasNoteRecognized() const =0;
  56                 virtual double getFundamentalWaveLength() const         {return GetSamplingRate()/getFundamentalFreq();}
  57                 virtual double getFundamentalFreq() const                       {return GetSamplingRate()/getFundamentalWaveLength();}
  58                 virtual double getFundamentalNote() const                       {return f2hf(getFundamentalFreq());}
  59                 virtual int getMinSize() const =0;
  60
  61                 virtual ~Algorithm();
  62         };
  63
  64         class Transform : public Algorithm
  65         {
  66           protected:
  67                 double m_component_treshold;
  68
  69                 vector< complex<double> > m_harmonics;
  70                 vector<double> m_components;
  71                 double m_components_max;
  72
  73           public:
  74                 inline double getComponentTreshold()                            {return m_component_treshold;}
  75                 inline void setComponentTreshold(double t)                      {m_component_treshold=t;}
  76
  77                 Transform();
  78
  79                 size_t size() const                                                                     {return m_components.size();}
  80
  81                 const vector< complex<double> >& getHarmonics()         {return m_harmonics;}
  82                 const vector<double>& getComponents()                           {return m_components;}
  83                 double getComponentsMax()                                                       {return m_components_max;}
  84
  85                 virtual ~Transform(){}
  86         };
  87 }
  88
  89 #endif // _Algorithms_h_
  90