SDTAnalysis.h File Reference

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Typedefs
typedef struct SDTZeroCrossing	SDTZeroCrossing
	Opaque data structure for a zero crossing rate detector object.
typedef struct SDTMyoelastic	SDTMyoelastic
	Opaque data structure for a myoelastic feature extractor object.
typedef struct SDTSpectralFeats	SDTSpectralFeats
	Opaque data structure for a spectral features extractor.
typedef struct SDTPitch	SDTPitch
	Opaque data structure for a fundamental frequency estimator.

Functions
SDTZeroCrossing *	SDTZeroCrossing_new (unsigned int size)
	Instantiates a zero crossing rate detector. More...
void	SDTZeroCrossing_free (SDTZeroCrossing *x)
	Destroys a zero crossing rate detector. More...
void	SDTZeroCrossing_setOverlap (SDTZeroCrossing *x, double f)
	Sets the analysis window overlapping ratio. Accepted values go from 0.0 to 1.0, with 0.0 meaning no overlap and 1.0 meaning total overlap. More...
int	SDTZeroCrossing_dsp (SDTZeroCrossing *x, double *out, double in)
	Signal processing routine. Call this function at sample rate to perform signal analysis. More...
SDTMyoelastic *	SDTMyoelastic_new (unsigned int size)
	Instantiates a myoelastic feature extractor. More...
void	SDTMyoelastic_free (SDTMyoelastic *x)
	Destroys a myoelastic feature extractor. More...
void	SDTMyoelastic_setLowFrequency (SDTMyoelastic *x, double f)
	Sets the low frequency cutoff. More...
void	SDTMyoelastic_setHighFrequency (SDTMyoelastic *x, double f)
	Sets the high frequency cutoff. More...
void	SDTMyoelastic_setThreshold (SDTMyoelastic *x, double f)
	Sets the amplitude threshold of the input gate. Myoelastic activity is not computed for signals whose amplitude is below this thresold. More...
void	SDTMyoelastic_dsp (SDTMyoelastic *x, double *outs, double in)
	Signal processing routine. Call this function at sample rate to perform signal analysis. More...
SDTSpectralFeats *	SDTSpectralFeats_new (unsigned int size)
	Instantiates a spectral features extractor. More...
void	SDTSpectralFeats_free (SDTSpectralFeats *x)
	Destroys a spectral features extractor. More...
void	SDTSpectralFeats_setOverlap (SDTSpectralFeats *x, double f)
	Sets the analysis window overlapping ratio. Accepted values go from 0.0 to 1.0, with 0.0 meaning no overlap and 1.0 meaning total overlap. More...
void	SDTSpectralFeats_setMinFreq (SDTSpectralFeats *x, double f)
	Sets the lower frequency bound for spectral analysis. Spectral bins below this frequency are ignored in the audio descriptors computation. More...
void	SDTSpectralFeats_setMaxFreq (SDTSpectralFeats *x, double f)
	Sets the upper frequency bound for spectral analysis. Spectral bins above this frequency are ignored in the audio descriptors computation. More...
int	SDTSpectralFeats_dsp (SDTSpectralFeats *x, double *outs, double in)
	Signal processing routine. Call this function for each sample to perform signal analysis. More...
SDTPitch *	SDTPitch_new (unsigned int size)
	Instantiates a fundamental frequency estimator object. More...
void	SDTPitch_free (SDTPitch *x)
	Destroys a fundamental frequency estimator instance. More...
void	SDTPitch_setOverlap (SDTPitch *x, double f)
	Sets the analysis window overlapping ratio. Accepted values go from 0.0 to 1.0, with 0.0 meaning no overlap and 1.0 meaning total overlap. More...
void	SDTPitch_setTolerance (SDTPitch *x, double f)
	Sets the peak detection tolerance. Always choosing the greatest NSDF peak as pitch estimation sometimes leads to wrong octave detection errors. To overcome this problem, some tolerance is introduced in the peak detection algorithm. The chosen NSDF peak is the one with lowest frequency among those with value close enough to the global maximum. A value of 0.0 always selects the global maximum, while a value of 1.0 always selects the last NSDF peak. More...
int	SDTPitch_dsp (SDTPitch *x, double *outs, double in)
	Signal processing routine. Call this function for each sample to perform signal analysis. More...