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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are met:
** - Redistributions of source code must retain the above copyright notice,
** this list of conditions and the following disclaimer.
** - Redistributions in binary form must reproduce the above copyright notice,
** this list of conditions and the following disclaimer in the documentation
** and/or other materials provided with the distribution.
** - Neither the name of Nokia Corporation and its Subsidiary(-ies) nor the
** names of its contributors may be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
** ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
** LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
** INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
** CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
** ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
** POSSIBILITY OF SUCH DAMAGE.
** $QT_END_LICENSE$
**
*****************************************************************************/
#ifndef FREQUENCYSPECTRUM_H
#define FREQUENCYSPECTRUM_H
#include <QtCore/QVector>
/**
* Represents a frequency spectrum as a series of elements, each of which
* consists of a frequency, an amplitude and a phase.
*/
class FrequencySpectrum {
public:
FrequencySpectrum(int numPoints = 0);
struct Element {
Element()
: frequency(0.0), amplitude(0.0), phase(0.0), clipped(false)
{ }
/**
* Frequency in Hertz
*/
qreal frequency;
/**
* Amplitude in range [0.0, 1.0]
*/
qreal amplitude;
/**
* Phase in range [0.0, 2*PI]
*/
qreal phase;
/**
* Indicates whether value has been clipped during spectrum analysis
*/
bool clipped;
};
typedef QVector<Element>::iterator iterator;
typedef QVector<Element>::const_iterator const_iterator;
void reset();
int count() const;
Element& operator[](int index);
const Element& operator[](int index) const;
iterator begin();
iterator end();
const_iterator begin() const;
const_iterator end() const;
private:
QVector<Element> m_elements;
};
#endif // FREQUENCYSPECTRUM_H
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