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comparison maths/MathUtilities.h @ 54:5bec06ecc88a

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* First cut at Matthew's downbeat estimator -- untested so far
author cannam
date Tue, 10 Feb 2009 12:52:43 +0000
parents ad645e404d0c
children 7fe29d8a7eaf
comparison
equal deleted inserted replaced
53:796170a9c8e4 54:5bec06ecc88a
19 static double round( double x ); 19 static double round( double x );
20 20
21 static void getFrameMinMax( const double* data, unsigned int len, double* min, double* max ); 21 static void getFrameMinMax( const double* data, unsigned int len, double* min, double* max );
22 22
23 static double mean( const double* src, unsigned int len ); 23 static double mean( const double* src, unsigned int len );
24 static double mean( const std::vector<double> &data,
25 unsigned int start, unsigned int count );
24 static double sum( const double* src, unsigned int len ); 26 static double sum( const double* src, unsigned int len );
25 static double median( const double* src, unsigned int len ); 27 static double median( const double* src, unsigned int len );
26 28
27 static double princarg( double ang ); 29 static double princarg( double ang );
28 static double mod( double x, double y); 30 static double mod( double x, double y);
30 static void getAlphaNorm(const double *data, unsigned int len, unsigned int alpha, double* ANorm); 32 static void getAlphaNorm(const double *data, unsigned int len, unsigned int alpha, double* ANorm);
31 static double getAlphaNorm(const std::vector <double> &data, unsigned int alpha ); 33 static double getAlphaNorm(const std::vector <double> &data, unsigned int alpha );
32 34
33 static void circShift( double* data, int length, int shift); 35 static void circShift( double* data, int length, int shift);
34 36
35 static int getMax( double* data, unsigned int length, double* max ); 37 static int getMax( double* data, unsigned int length, double* max = 0 );
38 static int getMax( const std::vector<double> &data, double* max = 0 );
36 static int compareInt(const void * a, const void * b); 39 static int compareInt(const void * a, const void * b);
37 40
38 enum NormaliseType { 41 enum NormaliseType {
39 NormaliseNone, 42 NormaliseNone,
40 NormaliseUnitSum, 43 NormaliseUnitSum,
44 static void normalise(double *data, int length, 47 static void normalise(double *data, int length,
45 NormaliseType n = NormaliseUnitMax); 48 NormaliseType n = NormaliseUnitMax);
46 49
47 static void normalise(std::vector<double> &data, 50 static void normalise(std::vector<double> &data,
48 NormaliseType n = NormaliseUnitMax); 51 NormaliseType n = NormaliseUnitMax);
52
53 // moving mean threshholding:
54 static void adaptiveThreshold(std::vector<double> &data);
49 }; 55 };
50 56
51 #endif 57 #endif