441 lines
12 KiB
C++
441 lines
12 KiB
C++
/****************************************************************************
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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 examples of the Qt Mobility Components.
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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 Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** permission.
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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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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "camera.h"
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#include "ui_camera.h"
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#include "videosettings.h"
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#include "imagesettings.h"
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#include <qmediaservice.h>
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#include <qmediarecorder.h>
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#include <qcamera.h>
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#include <qcameraviewfinder.h>
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#include <qmessagebox.h>
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#include <qpalette.h>
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#include <QtGui>
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#if (defined(Q_WS_MAEMO_5) || defined(Q_WS_MAEMO_6)) && QT_VERSION >= 0x040700
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#define HAVE_CAMERA_BUTTONS
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#endif
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Camera::Camera(QWidget *parent) :
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QMainWindow(parent),
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ui(new Ui::Camera),
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camera(0),
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imageCapture(0),
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mediaRecorder(0),
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isCapturingImage(false),
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applicationExiting(false)
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{
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ui->setupUi(this);
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//Camera devices:
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QByteArray cameraDevice;
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QActionGroup *videoDevicesGroup = new QActionGroup(this);
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videoDevicesGroup->setExclusive(true);
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foreach(const QByteArray &deviceName, QCamera::availableDevices()) {
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QString description = camera->deviceDescription(deviceName);
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QAction *videoDeviceAction = new QAction(description, videoDevicesGroup);
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videoDeviceAction->setCheckable(true);
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videoDeviceAction->setData(QVariant(deviceName));
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if (cameraDevice.isEmpty()) {
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cameraDevice = deviceName;
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videoDeviceAction->setChecked(true);
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}
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ui->menuDevices->addAction(videoDeviceAction);
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}
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connect(videoDevicesGroup, SIGNAL(triggered(QAction*)), this, SLOT(updateCameraDevice(QAction*)));
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connect(ui->captureWidget, SIGNAL(currentChanged(int)), SLOT(updateCaptureMode()));
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#ifdef HAVE_CAMERA_BUTTONS
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ui->lockButton->hide();
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#endif
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setCamera(cameraDevice);
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}
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Camera::~Camera()
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{
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delete mediaRecorder;
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delete imageCapture;
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delete camera;
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}
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void Camera::setCamera(const QByteArray &cameraDevice)
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{
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delete imageCapture;
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delete mediaRecorder;
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delete camera;
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if (cameraDevice.isEmpty())
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camera = new QCamera;
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else
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camera = new QCamera(cameraDevice);
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connect(camera, SIGNAL(stateChanged(QCamera::State)), this, SLOT(updateCameraState(QCamera::State)));
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connect(camera, SIGNAL(error(QCamera::Error)), this, SLOT(displayCameraError()));
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mediaRecorder = new QMediaRecorder(camera);
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connect(mediaRecorder, SIGNAL(stateChanged(QMediaRecorder::State)), this, SLOT(updateRecorderState(QMediaRecorder::State)));
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imageCapture = new QCameraImageCapture(camera);
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connect(mediaRecorder, SIGNAL(durationChanged(qint64)), this, SLOT(updateRecordTime()));
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connect(mediaRecorder, SIGNAL(error(QMediaRecorder::Error)), this, SLOT(displayRecorderError()));
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mediaRecorder->setMetaData(QtMultimediaKit::Title, QVariant(QLatin1String("Test Title")));
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connect(ui->exposureCompensation, SIGNAL(valueChanged(int)), SLOT(setExposureCompensation(int)));
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camera->setViewfinder(ui->viewfinder);
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updateCameraState(camera->state());
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updateLockStatus(camera->lockStatus(), QCamera::UserRequest);
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updateRecorderState(mediaRecorder->state());
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connect(imageCapture, SIGNAL(readyForCaptureChanged(bool)), this, SLOT(readyForCapture(bool)));
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connect(imageCapture, SIGNAL(imageCaptured(int,QImage)), this, SLOT(processCapturedImage(int,QImage)));
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connect(imageCapture, SIGNAL(imageSaved(int,QString)), this, SLOT(imageSaved(int,QString)));
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connect(camera, SIGNAL(lockStatusChanged(QCamera::LockStatus, QCamera::LockChangeReason)),
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this, SLOT(updateLockStatus(QCamera::LockStatus, QCamera::LockChangeReason)));
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ui->captureWidget->setTabEnabled(0, (camera->isCaptureModeSupported(QCamera::CaptureStillImage)));
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ui->captureWidget->setTabEnabled(1, (camera->isCaptureModeSupported(QCamera::CaptureVideo)));
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updateCaptureMode();
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camera->start();
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}
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void Camera::keyPressEvent(QKeyEvent * event)
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{
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if (event->isAutoRepeat())
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return;
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switch (event->key()) {
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#if QT_VERSION >= 0x040700
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case Qt::Key_CameraFocus:
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displayViewfinder();
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camera->searchAndLock();
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event->accept();
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break;
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case Qt::Key_Camera:
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if (camera->captureMode() == QCamera::CaptureStillImage) {
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takeImage();
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} else {
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if (mediaRecorder->state() == QMediaRecorder::RecordingState)
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stop();
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else
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record();
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}
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event->accept();
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break;
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#endif
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default:
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QMainWindow::keyPressEvent(event);
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}
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}
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void Camera::keyReleaseEvent(QKeyEvent * event)
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{
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if (event->isAutoRepeat())
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return;
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switch (event->key()) {
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#if QT_VERSION >= 0x040700
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case Qt::Key_CameraFocus:
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camera->unlock();
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break;
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#endif
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default:
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QMainWindow::keyReleaseEvent(event);
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}
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}
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void Camera::updateRecordTime()
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{
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QString str = QString("Recorded %1 sec").arg(mediaRecorder->duration()/1000);
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ui->statusbar->showMessage(str);
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}
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void Camera::processCapturedImage(int requestId, const QImage& img)
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{
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Q_UNUSED(requestId);
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QImage scaledImage = img.scaled(ui->viewfinder->size(),
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Qt::KeepAspectRatio,
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Qt::SmoothTransformation);
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ui->lastImagePreviewLabel->setPixmap(QPixmap::fromImage(scaledImage));
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//display captured image for 4 seconds
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displayCapturedImage();
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QTimer::singleShot(4000, this, SLOT(displayViewfinder()));
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}
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void Camera::configureCaptureSettings()
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{
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switch (camera->captureMode()) {
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case QCamera::CaptureStillImage:
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configureImageSettings();
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break;
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case QCamera::CaptureVideo:
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configureVideoSettings();
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break;
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default:
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break;
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}
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}
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void Camera::configureVideoSettings()
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{
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VideoSettings settingsDialog(mediaRecorder);
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settingsDialog.setAudioSettings(audioSettings);
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settingsDialog.setVideoSettings(videoSettings);
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settingsDialog.setFormat(videoContainerFormat);
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if (settingsDialog.exec()) {
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audioSettings = settingsDialog.audioSettings();
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videoSettings = settingsDialog.videoSettings();
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videoContainerFormat = settingsDialog.format();
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mediaRecorder->setEncodingSettings(
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audioSettings,
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videoSettings,
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videoContainerFormat);
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}
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}
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void Camera::configureImageSettings()
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{
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ImageSettings settingsDialog(imageCapture);
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settingsDialog.setImageSettings(imageSettings);
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if (settingsDialog.exec()) {
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imageSettings = settingsDialog.imageSettings();
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imageCapture->setEncodingSettings(imageSettings);
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}
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}
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void Camera::record()
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{
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mediaRecorder->record();
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updateRecordTime();
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}
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void Camera::pause()
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{
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mediaRecorder->pause();
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}
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void Camera::stop()
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{
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mediaRecorder->stop();
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}
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void Camera::setMuted(bool muted)
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{
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mediaRecorder->setMuted(muted);
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}
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void Camera::toggleLock()
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{
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switch (camera->lockStatus()) {
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case QCamera::Searching:
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case QCamera::Locked:
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camera->unlock();
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break;
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case QCamera::Unlocked:
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camera->searchAndLock();
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}
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}
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void Camera::updateLockStatus(QCamera::LockStatus status, QCamera::LockChangeReason reason)
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{
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QColor indicationColor = Qt::black;
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switch (status) {
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case QCamera::Searching:
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indicationColor = Qt::yellow;
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ui->statusbar->showMessage(tr("Focusing..."));
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ui->lockButton->setText(tr("Focusing..."));
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break;
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case QCamera::Locked:
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indicationColor = Qt::darkGreen;
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ui->lockButton->setText(tr("Unlock"));
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ui->statusbar->showMessage(tr("Focused"), 2000);
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break;
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case QCamera::Unlocked:
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indicationColor = reason == QCamera::LockFailed ? Qt::red : Qt::black;
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ui->lockButton->setText(tr("Focus"));
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if (reason == QCamera::LockFailed)
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ui->statusbar->showMessage(tr("Focus Failed"), 2000);
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}
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QPalette palette = ui->lockButton->palette();
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palette.setColor(QPalette::ButtonText, indicationColor);
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ui->lockButton->setPalette(palette);
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}
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void Camera::takeImage()
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{
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isCapturingImage = true;
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imageCapture->capture();
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}
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void Camera::startCamera()
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{
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camera->start();
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}
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void Camera::stopCamera()
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{
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camera->stop();
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}
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void Camera::updateCaptureMode()
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{
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int tabIndex = ui->captureWidget->currentIndex();
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QCamera::CaptureMode captureMode = tabIndex == 0 ? QCamera::CaptureStillImage : QCamera::CaptureVideo;
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if (camera->isCaptureModeSupported(captureMode))
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camera->setCaptureMode(captureMode);
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}
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void Camera::updateCameraState(QCamera::State state)
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{
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switch (state) {
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case QCamera::ActiveState:
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ui->actionStartCamera->setEnabled(false);
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ui->actionStopCamera->setEnabled(true);
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ui->captureWidget->setEnabled(true);
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ui->actionSettings->setEnabled(true);
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break;
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case QCamera::UnloadedState:
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case QCamera::LoadedState:
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ui->actionStartCamera->setEnabled(true);
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ui->actionStopCamera->setEnabled(false);
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ui->captureWidget->setEnabled(false);
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ui->actionSettings->setEnabled(false);
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}
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}
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void Camera::updateRecorderState(QMediaRecorder::State state)
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{
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switch (state) {
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case QMediaRecorder::StoppedState:
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ui->recordButton->setEnabled(true);
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ui->pauseButton->setEnabled(true);
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ui->stopButton->setEnabled(false);
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break;
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case QMediaRecorder::PausedState:
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ui->recordButton->setEnabled(true);
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ui->pauseButton->setEnabled(false);
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ui->stopButton->setEnabled(true);
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break;
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case QMediaRecorder::RecordingState:
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ui->recordButton->setEnabled(false);
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ui->pauseButton->setEnabled(true);
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ui->stopButton->setEnabled(true);
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break;
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}
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}
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void Camera::setExposureCompensation(int index)
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{
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camera->exposure()->setExposureCompensation(index*0.5);
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}
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void Camera::displayRecorderError()
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{
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QMessageBox::warning(this, tr("Capture error"), mediaRecorder->errorString());
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}
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void Camera::displayCameraError()
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{
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QMessageBox::warning(this, tr("Camera error"), camera->errorString());
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}
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void Camera::updateCameraDevice(QAction *action)
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{
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setCamera(action->data().toByteArray());
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}
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void Camera::displayViewfinder()
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{
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ui->stackedWidget->setCurrentIndex(0);
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}
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void Camera::displayCapturedImage()
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{
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ui->stackedWidget->setCurrentIndex(1);
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}
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void Camera::readyForCapture(bool ready)
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{
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ui->takeImageButton->setEnabled(ready);
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}
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void Camera::imageSaved(int id, const QString &fileName)
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{
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Q_UNUSED(id);
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Q_UNUSED(fileName);
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isCapturingImage = false;
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if (applicationExiting)
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close();
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}
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void Camera::closeEvent(QCloseEvent *event)
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{
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if (isCapturingImage) {
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setEnabled(false);
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applicationExiting = true;
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event->ignore();
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} else {
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event->accept();
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}
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}
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