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@@ -23,6 +23,7 @@ |
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#ifndef AudioTuner_h_ |
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#define AudioTuner_h_ |
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#include <core_pins.h> |
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#include "AudioStream.h" |
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#include "arm_math.h" |
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/*********************************************************************** |
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@@ -50,76 +51,75 @@ public: |
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* |
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* @return none |
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*/ |
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AudioTuner( void ) : AudioStream( 1, inputQueueArray ), |
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data( 0.0 ), |
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coeff_p( NULL ), |
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enabled( false ), |
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new_output( false ), |
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coeff_size( 0 ) |
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{ |
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} |
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/** |
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* initialize variables and start |
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* |
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* @param threshold Allowed uncertainty |
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* @param coeff coefficients for fir filter |
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* @param taps number of coefficients, even |
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* @param factor must be power of 2 |
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*/ |
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void begin( float threshold, int16_t *coeff, uint8_t taps, uint8_t factor ); |
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/** |
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* sets threshold value |
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* |
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* @param thresh |
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* @return none |
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*/ |
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void threshold( float p ); |
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/** |
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* triggers true when valid frequency is found |
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* |
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* @return flag to indicate valid frequency is found |
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*/ |
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bool available( void ); |
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/** |
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* get frequency |
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* |
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* @return frequency in hertz |
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*/ |
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float read( void ); |
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/** |
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* get predicitity |
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* |
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* @return probability of frequency found |
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*/ |
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float probability( void ); |
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/** |
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* fir decimation coefficents |
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* |
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* @return none |
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*/ |
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void coeff( int16_t *p, int n ); |
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/** |
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* disable yin |
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* |
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* @return none |
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*/ |
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void disable( void ); |
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/** |
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* Audio Library calls this update function ~2.9ms |
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* |
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* @return none |
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*/ |
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virtual void update( void ); |
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AudioTuner(void) |
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: AudioStream(1, inputQueueArray) |
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, data(0.0) |
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, coeff_p(NULL) |
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, coeff_size(0) |
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, new_output(false) |
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, enabled(false) |
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{} |
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/** |
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* initialize variables and start |
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* |
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* @param threshold Allowed uncertainty |
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* @param coeff coefficients for fir filter |
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* @param taps number of coefficients, even |
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* @param factor must be power of 2 |
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*/ |
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void begin(float threshold, int16_t *coeff, uint8_t taps, uint8_t factor); |
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/** |
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* sets threshold value |
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* |
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* @param thresh |
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* @return none |
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*/ |
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void threshold(float p); |
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/** |
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* triggers true when valid frequency is found |
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* |
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* @return flag to indicate valid frequency is found |
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*/ |
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bool available(void); |
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/** |
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* get frequency |
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* |
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* @return frequency in hertz |
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*/ |
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float read(void); |
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/** |
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* get predicitity |
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* |
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* @return probability of frequency found |
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*/ |
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float probability(void); |
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/** |
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* fir decimation coefficents |
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* |
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* @return none |
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*/ |
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void coeff(int16_t *p, int n); |
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/** |
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* disable yin |
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* |
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* @return none |
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*/ |
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void disable(void); |
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/** |
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* Audio Library calls this update function ~2.9ms |
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* |
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* @return none |
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*/ |
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virtual void update(void); |
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private: |
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/** |
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* check the sampled data for fundamental frequency |
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@@ -132,14 +132,14 @@ private: |
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* @return tau |
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*/ |
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uint16_t estimate( uint64_t *yin, uint64_t *rs, uint16_t head, uint16_t tau ); |
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/** |
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* process audio data |
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* |
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* @return none |
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*/ |
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void process( int16_t *p ); |
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/** |
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* Variables |
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*/ |