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Diffstat (limited to 'examples/spectrum/app/engine.h')
| -rw-r--r-- | examples/spectrum/app/engine.h | 315 |
1 files changed, 0 insertions, 315 deletions
diff --git a/examples/spectrum/app/engine.h b/examples/spectrum/app/engine.h deleted file mode 100644 index 51c63b3..0000000 --- a/examples/spectrum/app/engine.h +++ /dev/null @@ -1,315 +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 ENGINE_H -#define ENGINE_H - -#include "spectrum.h" -#include "spectrumanalyser.h" -#include "wavfile.h" - -#include <QObject> -#include <QByteArray> -#include <QBuffer> -#include <QVector> -#include <QtMultimedia/QAudioDeviceInfo> -#include <QtMultimedia/QAudioFormat> - -#ifdef DUMP_CAPTURED_AUDIO -#define DUMP_DATA -#endif - -#ifdef DUMP_SPECTRUM -#define DUMP_DATA -#endif - -#ifdef DUMP_DATA -#include <QDir> -#endif - -class FrequencySpectrum; -QT_FORWARD_DECLARE_CLASS(QAudioInput) -QT_FORWARD_DECLARE_CLASS(QAudioOutput) -QT_FORWARD_DECLARE_CLASS(QFile) - -/** - * This class interfaces with the QtMultimedia audio classes, and also with - * the SpectrumAnalyser class. Its role is to manage the capture and playback - * of audio data, meanwhile performing real-time analysis of the audio level - * and frequency spectrum. - */ -class Engine : public QObject { - Q_OBJECT -public: - Engine(QObject *parent = 0); - ~Engine(); - - const QList<QAudioDeviceInfo>& availableAudioInputDevices() const - { return m_availableAudioInputDevices; } - - const QList<QAudioDeviceInfo>& availableAudioOutputDevices() const - { return m_availableAudioOutputDevices; } - - QAudio::Mode mode() const { return m_mode; } - QAudio::State state() const { return m_state; } - - /** - * \return Current audio format - * \note May be QAudioFormat() if engine is not initialized - */ - const QAudioFormat& format() const { return m_format; } - - /** - * Stop any ongoing recording or playback, and reset to ground state. - */ - void reset(); - - /** - * Load data from WAV file - */ - bool loadFile(const QString &fileName); - - /** - * Generate tone - */ - bool generateTone(const Tone &tone); - - /** - * Generate tone - */ - bool generateSweptTone(qreal amplitude); - - /** - * Initialize for recording - */ - bool initializeRecord(); - - /** - * Position of the audio input device. - * \return Position in bytes. - */ - qint64 recordPosition() const { return m_recordPosition; } - - /** - * RMS level of the most recently processed set of audio samples. - * \return Level in range (0.0, 1.0) - */ - qreal rmsLevel() const { return m_rmsLevel; } - - /** - * Peak level of the most recently processed set of audio samples. - * \return Level in range (0.0, 1.0) - */ - qreal peakLevel() const { return m_peakLevel; } - - /** - * Position of the audio output device. - * \return Position in bytes. - */ - qint64 playPosition() const { return m_playPosition; } - - /** - * Length of the internal engine buffer. - * \return Buffer length in bytes. - */ - qint64 bufferLength() const; - - /** - * Amount of data held in the buffer. - * \return Data length in bytes. - */ - qint64 dataLength() const { return m_dataLength; } - - /** - * Set window function applied to audio data before spectral analysis. - */ - void setWindowFunction(WindowFunction type); - -public slots: - void startRecording(); - void startPlayback(); - void suspend(); - void setAudioInputDevice(const QAudioDeviceInfo &device); - void setAudioOutputDevice(const QAudioDeviceInfo &device); - -signals: - void stateChanged(QAudio::Mode mode, QAudio::State state); - - /** - * Informational message for non-modal display - */ - void infoMessage(const QString &message, int durationMs); - - /** - * Error message for modal display - */ - void errorMessage(const QString &heading, const QString &detail); - - /** - * Format of audio data has changed - */ - void formatChanged(const QAudioFormat &format); - - /** - * Length of buffer has changed. - * \param duration Duration in microseconds - */ - void bufferLengthChanged(qint64 duration); - - /** - * Amount of data in buffer has changed. - * \param Length of data in bytes - */ - void dataLengthChanged(qint64 duration); - - /** - * Position of the audio input device has changed. - * \param position Position in bytes - */ - void recordPositionChanged(qint64 position); - - /** - * Position of the audio output device has changed. - * \param position Position in bytes - */ - void playPositionChanged(qint64 position); - - /** - * Level changed - * \param rmsLevel RMS level in range 0.0 - 1.0 - * \param peakLevel Peak level in range 0.0 - 1.0 - * \param numSamples Number of audio samples analyzed - */ - void levelChanged(qreal rmsLevel, qreal peakLevel, int numSamples); - - /** - * Spectrum has changed. - * \param position Position of start of window in bytes - * \param length Length of window in bytes - * \param spectrum Resulting frequency spectrum - */ - void spectrumChanged(qint64 position, qint64 length, const FrequencySpectrum &spectrum); - - /** - * Buffer containing audio data has changed. - * \param position Position of start of buffer in bytes - * \param buffer Buffer - */ - void bufferChanged(qint64 position, qint64 length, const QByteArray &buffer); - -private slots: - void audioNotify(); - void audioStateChanged(QAudio::State state); - void audioDataReady(); - void spectrumChanged(const FrequencySpectrum &spectrum); - -private: - void resetAudioDevices(); - bool initialize(); - bool selectFormat(); - void stopRecording(); - void stopPlayback(); - void setState(QAudio::State state); - void setState(QAudio::Mode mode, QAudio::State state); - void setFormat(const QAudioFormat &format); - void setRecordPosition(qint64 position, bool forceEmit = false); - void setPlayPosition(qint64 position, bool forceEmit = false); - void calculateLevel(qint64 position, qint64 length); - void calculateSpectrum(qint64 position); - void setLevel(qreal rmsLevel, qreal peakLevel, int numSamples); - -#ifdef DUMP_DATA - void createOutputDir(); - QString outputPath() const { return m_outputDir.path(); } -#endif - -#ifdef DUMP_CAPTURED_AUDIO - void dumpData(); -#endif - -private: - QAudio::Mode m_mode; - QAudio::State m_state; - - bool m_generateTone; - SweptTone m_tone; - - WavFile* m_file; - // We need a second file handle via which to read data into m_buffer - // for analysis - WavFile* m_analysisFile; - - QAudioFormat m_format; - - const QList<QAudioDeviceInfo> m_availableAudioInputDevices; - QAudioDeviceInfo m_audioInputDevice; - QAudioInput* m_audioInput; - QIODevice* m_audioInputIODevice; - qint64 m_recordPosition; - - const QList<QAudioDeviceInfo> m_availableAudioOutputDevices; - QAudioDeviceInfo m_audioOutputDevice; - QAudioOutput* m_audioOutput; - qint64 m_playPosition; - QBuffer m_audioOutputIODevice; - - QByteArray m_buffer; - qint64 m_bufferPosition; - qint64 m_bufferLength; - qint64 m_dataLength; - - int m_levelBufferLength; - qreal m_rmsLevel; - qreal m_peakLevel; - - int m_spectrumBufferLength; - QByteArray m_spectrumBuffer; - SpectrumAnalyser m_spectrumAnalyser; - qint64 m_spectrumPosition; - - int m_count; - -#ifdef DUMP_DATA - QDir m_outputDir; -#endif - -}; - -#endif // ENGINE_H |