arduino-audio-tools
Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
FrequncyAutoCorrelationStream Class Reference

Determine Frequency using Audio Correlation. based on https://github.com/akellyirl/AutoCorr_Freq_detect. More...

#include <FrequencyDetection.h>

Inheritance diagram for FrequncyAutoCorrelationStream:
AudioStream BaseStream AudioInfoSupport AudioInfoSource Stream Print

Public Member Functions

 FrequncyAutoCorrelationStream (Print &out)
 
 FrequncyAutoCorrelationStream (Stream &in)
 
virtual void addNotifyAudioChange (AudioInfoSupport &bi)
 Adds target to be notified about audio changes.
 
virtual AudioInfo audioInfo () override
 provides the actual input AudioInfo
 
virtual AudioInfo audioInfoOut ()
 provides the actual output AudioInfo: this is usually the same as audioInfo() unless we use a transforming stream
 
int available () override
 
int availableForWrite () override
 
virtual bool begin ()
 
bool begin (AudioInfo info)
 
virtual void clearNotifyAudioChange ()
 Deletes all change notify subscriptions.
 
virtual void end ()
 
virtual void flush () override
 
float frequency (int channel)
 provides the determined frequncy
 
bool isNotifyActive ()
 Checks if the automatic AudioInfo update is active.
 
virtual operator bool ()
 
size_t readBytes (uint8_t *data, size_t len) override
 
virtual size_t readSilence (uint8_t *buffer, size_t length)
 Source to generate silence: just sets the buffer to 0.
 
virtual bool removeNotifyAudioChange (AudioInfoSupport &bi)
 Removes a target in order not to be notified about audio changes.
 
virtual void setAudioInfo (AudioInfo newInfo) override
 Defines the input AudioInfo.
 
void setNotifyActive (bool flag)
 Deactivate/Reactivate automatic AudioInfo updates: (default is active)
 
virtual size_t write (const uint8_t *data, size_t len) override
 
virtual size_t write (uint8_t ch) override
 
virtual void writeSilence (size_t len)
 Writes len bytes of silence (=0).
 

Protected Member Functions

template<class T >
void detect (T *samples, size_t len)
 
template<class T >
float detectChannel (int channel, T *samples, size_t len)
 
virtual int not_supported (int out, const char *msg="")
 
void notifyAudioChange (AudioInfo info)
 
void refillReadBuffer ()
 

Protected Attributes

int _timeout = 10
 
Vector< float > freq
 
AudioInfo info
 
bool is_notify_active = true
 
Vector< AudioInfoSupport * > notify_vector
 
Streamp_in = nullptr
 
Printp_out =nullptr
 
float sum =0
 
float sum_old =0
 
RingBuffer< uint8_t > tmp_in {0}
 
RingBuffer< uint8_t > tmp_out {0}
 

Detailed Description

Determine Frequency using Audio Correlation. based on https://github.com/akellyirl/AutoCorr_Freq_detect.

Author
Phil Schatzmann

The documentation for this class was generated from the following file: