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Diffstat (limited to 'examples/datavis3d/spectrum/spectrumapp/engine.h')
| -rw-r--r-- | examples/datavis3d/spectrum/spectrumapp/engine.h | 269 |
1 files changed, 0 insertions, 269 deletions
diff --git a/examples/datavis3d/spectrum/spectrumapp/engine.h b/examples/datavis3d/spectrum/spectrumapp/engine.h deleted file mode 100644 index 3d04e13b..00000000 --- a/examples/datavis3d/spectrum/spectrumapp/engine.h +++ /dev/null @@ -1,269 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/legal -** -** This file is part of the examples of QtDataVis3D. -** -** $QT_BEGIN_LICENSE:BSD$ -** 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 Digia Plc 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 <QAudioDeviceInfo> -#include <QAudioFormat> -#include <QBuffer> -#include <QByteArray> -#include <QDir> -#include <QObject> -#include <QVector> - -class FrequencySpectrum; -QT_BEGIN_NAMESPACE -class QAudioInput; -class QAudioOutput; -QT_END_NAMESPACE - -/** - * 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: - explicit 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); - - /** - * 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); - - /** - * 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 changedSpectrum(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); - -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; - -}; - -#endif // ENGINE_H |