Alessandro Bonazzi
8c43d5cf2f
Files correlati : cg0.exe cg0700a.msk cg0700b.msk cg3.exe cg4.exe Bug : Commento: Merge 1.0 libraries
316 lines
9.2 KiB
C++
316 lines
9.2 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef ENGINE_H
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#define ENGINE_H
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#include "spectrum.h"
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#include "spectrumanalyser.h"
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#include "wavfile.h"
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#include <QObject>
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#include <QByteArray>
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#include <QBuffer>
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#include <QVector>
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#include <QtMultimedia/QAudioDeviceInfo>
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#include <QtMultimedia/QAudioFormat>
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#ifdef DUMP_CAPTURED_AUDIO
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#define DUMP_DATA
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#endif
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#ifdef DUMP_SPECTRUM
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#define DUMP_DATA
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#endif
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#ifdef DUMP_DATA
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#include <QDir>
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#endif
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class FrequencySpectrum;
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QT_FORWARD_DECLARE_CLASS(QAudioInput)
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QT_FORWARD_DECLARE_CLASS(QAudioOutput)
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QT_FORWARD_DECLARE_CLASS(QFile)
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/**
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* This class interfaces with the QtMultimedia audio classes, and also with
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* the SpectrumAnalyser class. Its role is to manage the capture and playback
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* of audio data, meanwhile performing real-time analysis of the audio level
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* and frequency spectrum.
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*/
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class Engine : public QObject {
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Q_OBJECT
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public:
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Engine(QObject *parent = 0);
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~Engine();
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const QList<QAudioDeviceInfo>& availableAudioInputDevices() const
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{ return m_availableAudioInputDevices; }
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const QList<QAudioDeviceInfo>& availableAudioOutputDevices() const
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{ return m_availableAudioOutputDevices; }
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QAudio::Mode mode() const { return m_mode; }
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QAudio::State state() const { return m_state; }
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/**
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* \return Current audio format
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* \note May be QAudioFormat() if engine is not initialized
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*/
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const QAudioFormat& format() const { return m_format; }
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/**
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* Stop any ongoing recording or playback, and reset to ground state.
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*/
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void reset();
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/**
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* Load data from WAV file
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*/
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bool loadFile(const QString &fileName);
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/**
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* Generate tone
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*/
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bool generateTone(const Tone &tone);
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/**
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* Generate tone
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*/
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bool generateSweptTone(qreal amplitude);
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/**
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* Initialize for recording
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*/
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bool initializeRecord();
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/**
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* Position of the audio input device.
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* \return Position in bytes.
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*/
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qint64 recordPosition() const { return m_recordPosition; }
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/**
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* RMS level of the most recently processed set of audio samples.
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* \return Level in range (0.0, 1.0)
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*/
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qreal rmsLevel() const { return m_rmsLevel; }
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/**
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* Peak level of the most recently processed set of audio samples.
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* \return Level in range (0.0, 1.0)
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*/
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qreal peakLevel() const { return m_peakLevel; }
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/**
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* Position of the audio output device.
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* \return Position in bytes.
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*/
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qint64 playPosition() const { return m_playPosition; }
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/**
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* Length of the internal engine buffer.
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* \return Buffer length in bytes.
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*/
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qint64 bufferLength() const;
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/**
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* Amount of data held in the buffer.
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* \return Data length in bytes.
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*/
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qint64 dataLength() const { return m_dataLength; }
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/**
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* Set window function applied to audio data before spectral analysis.
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*/
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void setWindowFunction(WindowFunction type);
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public slots:
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void startRecording();
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void startPlayback();
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void suspend();
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void setAudioInputDevice(const QAudioDeviceInfo &device);
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void setAudioOutputDevice(const QAudioDeviceInfo &device);
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signals:
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void stateChanged(QAudio::Mode mode, QAudio::State state);
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/**
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* Informational message for non-modal display
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*/
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void infoMessage(const QString &message, int durationMs);
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/**
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* Error message for modal display
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*/
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void errorMessage(const QString &heading, const QString &detail);
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/**
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* Format of audio data has changed
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*/
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void formatChanged(const QAudioFormat &format);
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/**
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* Length of buffer has changed.
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* \param duration Duration in microseconds
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*/
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void bufferLengthChanged(qint64 duration);
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/**
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* Amount of data in buffer has changed.
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* \param Length of data in bytes
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*/
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void dataLengthChanged(qint64 duration);
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/**
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* Position of the audio input device has changed.
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* \param position Position in bytes
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*/
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void recordPositionChanged(qint64 position);
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/**
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* Position of the audio output device has changed.
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* \param position Position in bytes
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*/
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void playPositionChanged(qint64 position);
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/**
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* Level changed
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* \param rmsLevel RMS level in range 0.0 - 1.0
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* \param peakLevel Peak level in range 0.0 - 1.0
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* \param numSamples Number of audio samples analyzed
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*/
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void levelChanged(qreal rmsLevel, qreal peakLevel, int numSamples);
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/**
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* Spectrum has changed.
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* \param position Position of start of window in bytes
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* \param length Length of window in bytes
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* \param spectrum Resulting frequency spectrum
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*/
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void spectrumChanged(qint64 position, qint64 length, const FrequencySpectrum &spectrum);
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/**
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* Buffer containing audio data has changed.
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* \param position Position of start of buffer in bytes
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* \param buffer Buffer
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*/
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void bufferChanged(qint64 position, qint64 length, const QByteArray &buffer);
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private slots:
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void audioNotify();
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void audioStateChanged(QAudio::State state);
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void audioDataReady();
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void spectrumChanged(const FrequencySpectrum &spectrum);
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private:
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void resetAudioDevices();
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bool initialize();
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bool selectFormat();
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void stopRecording();
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void stopPlayback();
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void setState(QAudio::State state);
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void setState(QAudio::Mode mode, QAudio::State state);
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void setFormat(const QAudioFormat &format);
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void setRecordPosition(qint64 position, bool forceEmit = false);
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void setPlayPosition(qint64 position, bool forceEmit = false);
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void calculateLevel(qint64 position, qint64 length);
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void calculateSpectrum(qint64 position);
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void setLevel(qreal rmsLevel, qreal peakLevel, int numSamples);
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#ifdef DUMP_DATA
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void createOutputDir();
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QString outputPath() const { return m_outputDir.path(); }
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#endif
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#ifdef DUMP_CAPTURED_AUDIO
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void dumpData();
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#endif
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private:
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QAudio::Mode m_mode;
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QAudio::State m_state;
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bool m_generateTone;
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SweptTone m_tone;
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WavFile* m_file;
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// We need a second file handle via which to read data into m_buffer
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// for analysis
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WavFile* m_analysisFile;
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QAudioFormat m_format;
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const QList<QAudioDeviceInfo> m_availableAudioInputDevices;
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QAudioDeviceInfo m_audioInputDevice;
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QAudioInput* m_audioInput;
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QIODevice* m_audioInputIODevice;
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qint64 m_recordPosition;
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const QList<QAudioDeviceInfo> m_availableAudioOutputDevices;
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QAudioDeviceInfo m_audioOutputDevice;
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QAudioOutput* m_audioOutput;
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qint64 m_playPosition;
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QBuffer m_audioOutputIODevice;
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QByteArray m_buffer;
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qint64 m_bufferPosition;
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qint64 m_bufferLength;
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qint64 m_dataLength;
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int m_levelBufferLength;
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qreal m_rmsLevel;
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qreal m_peakLevel;
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int m_spectrumBufferLength;
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QByteArray m_spectrumBuffer;
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SpectrumAnalyser m_spectrumAnalyser;
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qint64 m_spectrumPosition;
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int m_count;
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#ifdef DUMP_DATA
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QDir m_outputDir;
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#endif
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};
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#endif // ENGINE_H
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