#include <cwkeyer.h>

Public Member Functions
	CWSmoother ()

	~CWSmoother ()

void	setNbFadeSamples (unsigned int nbFadeSamples)

bool	getFadeSample (bool on, float &sample)

Private Attributes
QMutex	m_mutex

unsigned int	m_fadeInCounter

unsigned int	m_fadeOutCounter

unsigned int	m_nbFadeSamples

float *	m_fadeInSamples

float *	m_fadeOutSamples

Detailed Description

Ancillary class to smooth out CW transitions with a sine shape

Definition at line 34 of file cwkeyer.h.

Constructor & Destructor Documentation

◆ CWSmoother()

CWSmoother::CWSmoother ( )

Definition at line 443 of file cwkeyer.cpp.

References setNbFadeSamples().

                        :
         m_fadeInCounter(0),
         m_fadeOutCounter(0),
         m_nbFadeSamples(0),
         m_fadeInSamples(0),
         m_fadeOutSamples(0)
 {
     setNbFadeSamples(192); // default is 4 ms at 48 kHz sample rate
 }

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◆ ~CWSmoother()

CWSmoother::~CWSmoother ( )

Definition at line 453 of file cwkeyer.cpp.

References m_fadeInSamples, and m_fadeOutSamples.

 {
     delete[] m_fadeInSamples;
     delete[] m_fadeOutSamples;
 }

Member Function Documentation

◆ getFadeSample()

bool CWSmoother::getFadeSample	(	bool	on,
		float &	sample
	)

Definition at line 487 of file cwkeyer.cpp.

References m_fadeInCounter, m_fadeInSamples, m_fadeOutCounter, m_fadeOutSamples, m_mutex, and m_nbFadeSamples.

Referenced by WFMMod::pullAF(), AMMod::pullAF(), NFMMod::pullAF(), FreeDVMod::pullAF(), and SSBMod::pullAF().

 {
     QMutexLocker mutexLocker(&m_mutex);
 
     if (on)
     {
         m_fadeOutCounter = 0;
 
         if (m_fadeInCounter < m_nbFadeSamples)
         {
             sample = m_fadeInSamples[m_fadeInCounter];
             m_fadeInCounter++;
             return true;
         }
         else
         {
             sample = 1.0f;
             return false;
         }
     }
     else
     {
         m_fadeInCounter = 0;
 
         if (m_fadeOutCounter < m_nbFadeSamples)
         {
             sample = m_fadeOutSamples[m_fadeOutCounter];
             m_fadeOutCounter++;
             return true;
         }
         else
         {
             sample = 0.0f;
             return false;
         }
     }
 }

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◆ setNbFadeSamples()

void CWSmoother::setNbFadeSamples ( unsigned int nbFadeSamples )

Definition at line 459 of file cwkeyer.cpp.

References i, m_fadeInCounter, m_fadeInSamples, m_fadeOutCounter, m_fadeOutSamples, m_mutex, m_nbFadeSamples, and StepFunctions::smootherstep().

Referenced by CWSmoother().

 {
     if (nbFadeSamples != m_nbFadeSamples)
     {
         QMutexLocker mutexLocker(&m_mutex);
 
         m_nbFadeSamples = nbFadeSamples;
 
         if (m_fadeInSamples) delete[] m_fadeInSamples;
         if (m_fadeOutSamples) delete[] m_fadeOutSamples;
 
         m_fadeInSamples = new float[m_nbFadeSamples];
         m_fadeOutSamples = new float[m_nbFadeSamples];
 
         for (unsigned int i = 0; i < m_nbFadeSamples; i++)
         {
             float x = i/ (float) m_nbFadeSamples;
             float y = 1.0f -x;
 
             m_fadeInSamples[i] = StepFunctions::smootherstep(x);
             m_fadeOutSamples[i] = StepFunctions::smootherstep(y);
         }
 
         m_fadeInCounter = 0;
         m_fadeOutCounter = 0;
     }
 }