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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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