#include <NoiseGenerator.h>

Inheritance diagram for Kwave::NoiseGenerator:

Collaboration diagram for Kwave::NoiseGenerator:

Public Slots
void	input (Kwave::SampleArray data)

void	setNoiseLevel (const QVariant fc)

Signals
void	output (Kwave::SampleArray data)

Signals inherited from Kwave::StreamObject
void	attributeChanged (const QVariant value)

Public Member Functions
	NoiseGenerator (QObject *parent=Q_NULLPTR)

virtual	~NoiseGenerator () Q_DECL_OVERRIDE

virtual void	goOn () Q_DECL_OVERRIDE

Public Member Functions inherited from Kwave::SampleSource
	SampleSource (QObject *parent=Q_NULLPTR)

virtual	~SampleSource ()

virtual bool	done () const

Public Member Functions inherited from Kwave::StreamObject
	StreamObject (QObject *parent=Q_NULLPTR)

virtual	~StreamObject ()

virtual unsigned int	tracks () const

virtual Kwave::StreamObject *	operator[] (unsigned int track)

virtual unsigned int	tracksOfPort (const char *port) const

virtual Kwave::StreamObject *	port (const char *port, unsigned int track)

virtual unsigned int	blockSize () const

void	setAttribute (const char *attribute, const QVariant &value)

Private Attributes
Kwave::SampleArray	m_buffer

double	m_noise_level

Additional Inherited Members
Static Public Member Functions inherited from Kwave::StreamObject
static void	setInteractive (bool interactive)

Detailed Description

Definition at line 31 of file NoiseGenerator.h.

Constructor & Destructor Documentation

◆ NoiseGenerator()

Kwave::NoiseGenerator::NoiseGenerator ( QObject * parent = Q_NULLPTR )

explicit

Constructor

Definition at line 26 of file NoiseGenerator.cpp.

     :Kwave::SampleSource(parent), m_buffer(blockSize()), m_noise_level(1.0)
 {
 }

◆ ~NoiseGenerator()

Kwave::NoiseGenerator::~NoiseGenerator ( )

virtual

Destructor

Definition at line 32 of file NoiseGenerator.cpp.

33 {

34 }

Member Function Documentation

◆ goOn()

void Kwave::NoiseGenerator::goOn ( )

virtual

produces a block of noise,

See also: Kwave::SampleSource::goOn()

Implements Kwave::SampleSource.

Definition at line 37 of file NoiseGenerator.cpp.

References m_buffer, and output().

 {
     emit output(m_buffer);
 }

◆ input

void Kwave::NoiseGenerator::input ( Kwave::SampleArray data )

slot

receives input data

Definition at line 43 of file NoiseGenerator.cpp.

References double2sample(), m_buffer, m_noise_level, Kwave::SampleArray::resize(), sample2double(), and Kwave::SampleArray::size().

 {
     bool ok = m_buffer.resize(data.size());
     Q_ASSERT(ok);
     Q_UNUSED(ok);
 
     m_buffer = data;
 
     const double alpha = (1.0 - m_noise_level);
     const double scale = (m_noise_level * 2.0) / static_cast<double>(RAND_MAX);
     for (unsigned i = 0; i < data.size(); ++i) {
         const Kwave::SampleArray &in = data;
         m_buffer[i] = double2sample(
             (sample2double(in[i]) * alpha) +
             ((qrand() - (RAND_MAX / 2)) * scale)
         );
     }
 }

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◆ output

void Kwave::NoiseGenerator::output ( Kwave::SampleArray data )

signal

emits a block with noise

Referenced by goOn().

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◆ setNoiseLevel

void Kwave::NoiseGenerator::setNoiseLevel ( const QVariant fc )

slot

Sets the noise level as a factor [0 .. 1.0]

Definition at line 63 of file NoiseGenerator.cpp.

References m_noise_level.

 {
     m_noise_level = QVariant(fc).toDouble();
 }

Member Data Documentation

◆ m_buffer

Kwave::SampleArray Kwave::NoiseGenerator::m_buffer

private

buffer for input

Definition at line 66 of file NoiseGenerator.h.

Referenced by goOn(), and input().

◆ m_noise_level

double Kwave::NoiseGenerator::m_noise_level

private

noise level [0 .. 1.0]

Definition at line 69 of file NoiseGenerator.h.

Referenced by input(), and setNoiseLevel().

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

plugins/noise/NoiseGenerator.h
plugins/noise/NoiseGenerator.cpp

Public Slots

Signals

Public Member Functions

Private Attributes

Additional Inherited Members