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Diffstat (limited to 'examples/spectrum/app/spectrumanalyser.h')
| -rw-r--r-- | examples/spectrum/app/spectrumanalyser.h | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/examples/spectrum/app/spectrumanalyser.h b/examples/spectrum/app/spectrumanalyser.h deleted file mode 100644 index 663c213..0000000 --- a/examples/spectrum/app/spectrumanalyser.h +++ /dev/null @@ -1,194 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2011 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 SPECTRUMANALYSER_H -#define SPECTRUMANALYSER_H - -#include <QByteArray> -#include <QObject> -#include <QVector> - -#ifdef DUMP_SPECTRUMANALYSER -#include <QDir> -#include <QFile> -#include <QTextStream> -#endif - -#include "frequencyspectrum.h" -#include "spectrum.h" - -#ifndef DISABLE_FFT -#include "FFTRealFixLenParam.h" -#endif - -QT_FORWARD_DECLARE_CLASS(QAudioFormat) -QT_FORWARD_DECLARE_CLASS(QThread) - -class FFTRealWrapper; - -class SpectrumAnalyserThreadPrivate; - -/** - * Implementation of the spectrum analysis which can be run in a - * separate thread. - */ -class SpectrumAnalyserThread : public QObject -{ - Q_OBJECT -public: - SpectrumAnalyserThread(QObject *parent); - ~SpectrumAnalyserThread(); - -public slots: - void setWindowFunction(WindowFunction type); - void calculateSpectrum(const QByteArray &buffer, - int inputFrequency, - int bytesPerSample); - -signals: - void calculationComplete(const FrequencySpectrum &spectrum); - -private: - void calculateWindow(); - -private: -#ifndef DISABLE_FFT - FFTRealWrapper* m_fft; -#endif - - const int m_numSamples; - - WindowFunction m_windowFunction; - -#ifdef DISABLE_FFT - typedef qreal DataType; -#else - typedef FFTRealFixLenParam::DataType DataType; -#endif - QVector<DataType> m_window; - - QVector<DataType> m_input; - QVector<DataType> m_output; - - FrequencySpectrum m_spectrum; - -#ifdef SPECTRUM_ANALYSER_SEPARATE_THREAD - QThread* m_thread; -#endif -}; - -/** - * Class which performs frequency spectrum analysis on a window of - * audio samples, provided to it by the Engine. - */ -class SpectrumAnalyser : public QObject -{ - Q_OBJECT -public: - SpectrumAnalyser(QObject *parent = 0); - ~SpectrumAnalyser(); - -#ifdef DUMP_SPECTRUMANALYSER - void setOutputPath(const QString &outputPath); -#endif - -public: - /* - * Set the windowing function which is applied before calculating the FFT - */ - void setWindowFunction(WindowFunction type); - - /* - * Calculate a frequency spectrum - * - * \param buffer Audio data - * \param format Format of audio data - * - * Frequency spectrum is calculated asynchronously. The result is returned - * via the spectrumChanged signal. - * - * An ongoing calculation can be cancelled by calling cancelCalculation(). - * - */ - void calculate(const QByteArray &buffer, const QAudioFormat &format); - - /* - * Check whether the object is ready to perform another calculation - */ - bool isReady() const; - - /* - * Cancel an ongoing calculation - * - * Note that cancelling is asynchronous. - */ - void cancelCalculation(); - -signals: - void spectrumChanged(const FrequencySpectrum &spectrum); - -private slots: - void calculationComplete(const FrequencySpectrum &spectrum); - -private: - void calculateWindow(); - -private: - - SpectrumAnalyserThread* m_thread; - - enum State { - Idle, - Busy, - Cancelled - }; - - State m_state; - -#ifdef DUMP_SPECTRUMANALYSER - QDir m_outputDir; - int m_count; - QFile m_textFile; - QTextStream m_textStream; -#endif -}; - -#endif // SPECTRUMANALYSER_H - |