Initial copy of QtMultimediaKit.
Comes from original repo, with SHA1: 2c82d5611655e5967f5c5095af50c0991c4378b2
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Michael Goddard
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doc/src/snippets/multimedia-snippets/audiorecorder.cpp
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215
doc/src/snippets/multimedia-snippets/audiorecorder.cpp
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Mobility Components.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtGui>
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#include <qaudiocapturesource.h>
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#include <qmediarecorder.h>
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#include <qmediaservice.h>
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#include <QtMultimediaKit/qaudioformat.h>
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#include "audiorecorder.h"
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AudioRecorder::AudioRecorder()
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{
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//! [create-objs-1]
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audiosource = new QAudioCaptureSource;
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capture = new QMediaRecorder(audiosource);
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//! [create-objs-1]
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// set a default file
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capture->setOutputLocation(QUrl("test.raw"));
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QWidget *window = new QWidget;
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QGridLayout* layout = new QGridLayout;
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QLabel* deviceLabel = new QLabel;
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deviceLabel->setText("Devices");
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deviceBox = new QComboBox(this);
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deviceBox->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Fixed);
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QLabel* codecLabel = new QLabel;
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codecLabel->setText("Codecs");
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codecsBox = new QComboBox(this);
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codecsBox->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Fixed);
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QLabel* qualityLabel = new QLabel;
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qualityLabel->setText("Quality");
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qualityBox = new QComboBox(this);
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qualityBox->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Fixed);
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//! [device-list]
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for(int i = 0; i < audiosource->deviceCount(); i++)
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deviceBox->addItem(audiosource->name(i));
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//! [device-list]
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//! [codec-list]
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QStringList codecs = capture->supportedAudioCodecs();
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for(int i = 0; i < codecs.count(); i++)
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codecsBox->addItem(codecs.at(i));
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//! [codec-list]
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qualityBox->addItem("Low");
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qualityBox->addItem("Medium");
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qualityBox->addItem("High");
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connect(capture, SIGNAL(durationChanged(qint64)), this, SLOT(updateProgress(qint64)));
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connect(capture, SIGNAL(stateChanged(QMediaRecorder::State)), this, SLOT(stateChanged(QMediaRecorder::State)));
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layout->addWidget(deviceLabel,0,0,Qt::AlignHCenter);
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connect(deviceBox,SIGNAL(activated(int)),SLOT(deviceChanged(int)));
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layout->addWidget(deviceBox,0,1,1,3,Qt::AlignLeft);
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layout->addWidget(codecLabel,1,0,Qt::AlignHCenter);
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connect(codecsBox,SIGNAL(activated(int)),SLOT(codecChanged(int)));
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layout->addWidget(codecsBox,1,1,Qt::AlignLeft);
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layout->addWidget(qualityLabel,1,2,Qt::AlignHCenter);
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connect(qualityBox,SIGNAL(activated(int)),SLOT(qualityChanged(int)));
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layout->addWidget(qualityBox,1,3,Qt::AlignLeft);
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fileButton = new QPushButton(this);
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fileButton->setText(tr("Output File"));
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connect(fileButton,SIGNAL(clicked()),SLOT(selectOutputFile()));
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layout->addWidget(fileButton,3,0,Qt::AlignHCenter);
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button = new QPushButton(this);
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button->setText(tr("Record"));
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connect(button,SIGNAL(clicked()),SLOT(toggleRecord()));
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layout->addWidget(button,3,3,Qt::AlignHCenter);
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recTime = new QLabel;
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recTime->setText("0 sec");
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layout->addWidget(recTime,4,0,Qt::AlignHCenter);
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window->setLayout(layout);
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setCentralWidget(window);
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window->show();
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active = false;
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}
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AudioRecorder::~AudioRecorder()
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{
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delete capture;
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delete audiosource;
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}
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void AudioRecorder::updateProgress(qint64 pos)
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{
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currentTime = pos;
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if(currentTime == 0) currentTime = 1;
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QString text = QString("%1 secs").arg(currentTime/1000);
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recTime->setText(text);
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}
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void AudioRecorder::stateChanged(QMediaRecorder::State state)
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{
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qWarning()<<"stateChanged() "<<state;
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}
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void AudioRecorder::deviceChanged(int idx)
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{
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//! [get-device]
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for(int i = 0; i < audiosource->deviceCount(); i++) {
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if(deviceBox->itemText(idx).compare(audiosource->name(i)) == 0)
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audiosource->setSelectedDevice(i);
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}
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//! [get-device]
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}
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void AudioRecorder::codecChanged(int idx)
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{
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Q_UNUSED(idx);
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//capture->setAudioCodec(codecsBox->itemText(idx));
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}
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void AudioRecorder::qualityChanged(int idx)
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{
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Q_UNUSED(idx);
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/*
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if(capture->audioCodec().compare("audio/pcm") == 0) {
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if(qualityBox->itemText(idx).compare("Low") == 0) {
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// 8000Hz mono is 8kbps
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capture->setAudioBitrate(8);
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} else if(qualityBox->itemText(idx).compare("Medium") == 0) {
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// 22050Hz mono is 44.1kbps
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capture->setAudioBitrate(44);
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} else if(qualityBox->itemText(idx).compare("High") == 0) {
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// 44100Hz mono is 88.2kbps
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capture->setAudioBitrate(88);
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}
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}
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*/
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}
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//! [toggle-record]
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void AudioRecorder::toggleRecord()
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{
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if(!active) {
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recTime->setText("0 sec");
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currentTime = 0;
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capture->record();
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button->setText(tr("Stop"));
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active = true;
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} else {
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capture->stop();
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button->setText(tr("Record"));
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active = false;
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}
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}
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//! [toggle-record]
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void AudioRecorder::selectOutputFile()
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{
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QStringList fileNames;
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QFileDialog dialog(this);
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dialog.setFileMode(QFileDialog::AnyFile);
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if (dialog.exec())
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fileNames = dialog.selectedFiles();
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if(fileNames.size() > 0)
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capture->setOutputLocation(QUrl(fileNames.first()));
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}
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