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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef VOICEANALYZER_H
#define VOICEANALYZER_H
#include <QObject>
#include <QAudioFormat>
#include <QDebug>
#include <QtCore/qmath.h>
#include <QtCore/qendian.h>
#include <QVariant>
#include "constants.h"
#include "fastfouriertransformer.h"
#include "math.h"
class VoiceAnalyzer : public QIODevice
{
Q_OBJECT
public:
VoiceAnalyzer(const QAudioFormat &format, QObject *parent = 0);
qint64 readData(char *data, qint64 maxlen);
qint64 writeData(const char *data, qint64 maxlen);
void start(qreal frequency);
void stop();
qreal frequency();
int getMaximumVoiceDifference();
int getMaximumPrecisionPerNote();
public slots:
void setCutOffPercentage(qreal cutoff);
private:
const QAudioFormat m_format;
QList<qint16> m_samples;
int m_totalSampleCount;
int m_maximumVoiceDifference;
qint16 getValueInt16(const uchar *ptr);
int m_stepSize;
qreal m_frequency;
qint64 m_position;
FastFourierTransformer *m_fftHelper;
void analyzeVoice();
signals:
void voiceDifference(QVariant frequency);
void correctFrequency();
void lowVoice();
public slots:
};
#endif // VOICEANALYZER_H
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