Kwave::CurveStreamAdapter Class Reference

#include <CurveStreamAdapter.h>

Inheritance diagram for Kwave::CurveStreamAdapter:

Collaboration diagram for Kwave::CurveStreamAdapter:

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

Public Member Functions
	CurveStreamAdapter (Kwave::Curve &curve, sample_index_t length)
virtual	~CurveStreamAdapter () 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
sample_index_t	m_position
sample_index_t	m_length
Kwave::Interpolation &	m_interpolation
Kwave::SampleArray	m_buffer

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

Detailed Description

Definition at line 31 of file CurveStreamAdapter.h.

Constructor & Destructor Documentation

CurveStreamAdapter()

Kwave::CurveStreamAdapter::CurveStreamAdapter	(	Kwave::Curve &	curve,
		sample_index_t	length
	)

Constructor.

Parameters

curve	the curve from which we take the interpolation
length	number of samples of the interpolated range

Definition at line 21 of file CurveStreamAdapter.cpp.

    :Kwave::SampleSource(),
     m_position(0), m_length(length),
     m_interpolation(curve.interpolation()),
     m_buffer(blockSize())
{
}

~CurveStreamAdapter()

Kwave::CurveStreamAdapter::~CurveStreamAdapter ( )

virtual

Destructor

Definition at line 31 of file CurveStreamAdapter.cpp.

{
}

Member Function Documentation

goOn()

void Kwave::CurveStreamAdapter::goOn ( )

virtual

See also

Kwave::KwaveSampleSource

Implements Kwave::SampleSource.

Definition at line 36 of file CurveStreamAdapter.cpp.

References Kwave::StreamObject::blockSize(), double2sample(), m_buffer, m_interpolation, m_length, m_position, output(), and Kwave::Interpolation::singleInterpolation().

Referenced by Kwave::AmplifyFreePlugin::run(), and Kwave::PlayBackPlugin::run().

{
    unsigned int offset;
    double x_max = static_cast<double>(m_length);
    const unsigned int samples = blockSize();

    // fill with interpolated points
    for (offset = 0; offset < samples; ++offset) {
        // x is [0.0 ... 1.0]
        const double x = static_cast<double>(m_position) / x_max;
        const double y = m_interpolation.singleInterpolation(x);
        m_buffer[offset] = double2sample(y);
        m_position++;

        // wrap-around, for periodic signals
        if (m_position > m_length)
            m_position = 0;
    }

    emit output(m_buffer);
}

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output

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

signal

emits a block with the interpolated curve

Referenced by goOn().

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Member Data Documentation

m_buffer

Kwave::SampleArray Kwave::CurveStreamAdapter::m_buffer

private

array with the interpolated curve data

Definition at line 66 of file CurveStreamAdapter.h.

Referenced by goOn().

m_interpolation

Kwave::Interpolation& Kwave::CurveStreamAdapter::m_interpolation

private

the interpolation

Definition at line 63 of file CurveStreamAdapter.h.

Referenced by goOn().

m_length

sample_index_t Kwave::CurveStreamAdapter::m_length

private

number of samples of the interpolated area

Definition at line 60 of file CurveStreamAdapter.h.

Referenced by goOn().

m_position

sample_index_t Kwave::CurveStreamAdapter::m_position

private

position within the interpolation

Definition at line 57 of file CurveStreamAdapter.h.

Referenced by goOn().

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

• libkwave/modules/CurveStreamAdapter.h
• libkwave/modules/CurveStreamAdapter.cpp