From 37b872da9eced344dd5feaf1898cab0d02984ea5 Mon Sep 17 00:00:00 2001 From: Dmytro Poplavskiy Date: Fri, 17 Aug 2012 13:44:14 +1000 Subject: Initial implementation of Mac camera backend Based on AVFoundation framework Change-Id: If4cfd105a592f50b42606624548b9ffc870e3e47 Reviewed-by: Gunnar Sletta --- .../avfoundation/camera/avfimagecapturecontrol.mm | 222 +++++++++++++++++++++ 1 file changed, 222 insertions(+) create mode 100644 src/plugins/avfoundation/camera/avfimagecapturecontrol.mm (limited to 'src/plugins/avfoundation/camera/avfimagecapturecontrol.mm') diff --git a/src/plugins/avfoundation/camera/avfimagecapturecontrol.mm b/src/plugins/avfoundation/camera/avfimagecapturecontrol.mm new file mode 100644 index 000000000..3d19eccad --- /dev/null +++ b/src/plugins/avfoundation/camera/avfimagecapturecontrol.mm @@ -0,0 +1,222 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "avfcameradebug.h" +#include "avfimagecapturecontrol.h" +#include "avfcamerasession.h" +#include "avfcameraservice.h" +#include "avfcameracontrol.h" + +#include +#include +#include +#include + +QT_USE_NAMESPACE + +AVFImageCaptureControl::AVFImageCaptureControl(AVFCameraService *service, QObject *parent) + : QCameraImageCaptureControl(parent) + , m_service(service) + , m_session(service->session()) + , m_cameraControl(service->cameraControl()) + , m_ready(false) + , m_lastCaptureId(0) + , m_videoConnection(nil) +{ + m_stillImageOutput = [[AVCaptureStillImageOutput alloc] init]; + + NSDictionary *outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys: + AVVideoCodecJPEG, AVVideoCodecKey, nil]; + + [m_stillImageOutput setOutputSettings:outputSettings]; + [outputSettings release]; + + connect(m_cameraControl, SIGNAL(captureModeChanged(QCamera::CaptureModes)), SLOT(updateReadyStatus())); + connect(m_cameraControl, SIGNAL(statusChanged(QCamera::Status)), SLOT(updateReadyStatus())); + + connect(m_session, SIGNAL(readyToConfigureConnections()), SLOT(updateCaptureConnection())); +} + +AVFImageCaptureControl::~AVFImageCaptureControl() +{ +} + +bool AVFImageCaptureControl::isReadyForCapture() const +{ + return m_videoConnection && + m_cameraControl->captureMode().testFlag(QCamera::CaptureStillImage) && + m_cameraControl->status() == QCamera::ActiveStatus; +} + +void AVFImageCaptureControl::updateReadyStatus() +{ + if (m_ready != isReadyForCapture()) { + m_ready = !m_ready; + qDebugCamera() << "ReadyToCapture status changed:" << m_ready; + Q_EMIT readyForCaptureChanged(m_ready); + } +} + +int AVFImageCaptureControl::capture(const QString &fileName) +{ + m_lastCaptureId++; + + if (!isReadyForCapture()) { + QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection, + Q_ARG(int, m_lastCaptureId), + Q_ARG(int, QCameraImageCapture::NotReadyError), + Q_ARG(QString, tr("Camera not ready"))); + return m_lastCaptureId; + } + + QString actualFileName = m_storageLocation.generateFileName(fileName, + QCamera::CaptureStillImage, + QLatin1String("img_"), + QLatin1String("jpg")); + + qDebugCamera() << "Capture image to" << actualFileName; + + int captureId = m_lastCaptureId; + [m_stillImageOutput captureStillImageAsynchronouslyFromConnection:m_videoConnection + completionHandler: ^(CMSampleBufferRef imageSampleBuffer, NSError *error) { + if (error) { + QStringList messageParts; + messageParts << QString::fromUtf8([[error localizedDescription] UTF8String]); + messageParts << QString::fromUtf8([[error localizedFailureReason] UTF8String]); + messageParts << QString::fromUtf8([[error localizedRecoverySuggestion] UTF8String]); + + QString errorMessage = messageParts.join(" "); + qDebugCamera() << "Image capture failed:" << errorMessage; + + QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection, + Q_ARG(int, captureId), + Q_ARG(int, QCameraImageCapture::ResourceError), + Q_ARG(QString, errorMessage)); + } else { + qDebugCamera() << "Image captured:" << actualFileName; + //we can't find the exact time the image is exposed, + //but image capture is very fast on desktop, so emit it here + QMetaObject::invokeMethod(this, "imageExposed", Qt::QueuedConnection, + Q_ARG(int, captureId)); + + NSData *nsJpgData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageSampleBuffer]; + QByteArray jpgData = QByteArray::fromRawData((const char *)[nsJpgData bytes], [nsJpgData length]); + + //Generate snap preview as downscalled image + { + QBuffer buffer(&jpgData); + QImageReader imageReader(&buffer); + QSize imgSize = imageReader.size(); + int downScaleSteps = 0; + while (imgSize.width() > 800 && downScaleSteps < 8) { + imgSize.rwidth() /= 2; + imgSize.rheight() /= 2; + downScaleSteps++; + } + + imageReader.setScaledSize(imgSize); + QImage snapPreview = imageReader.read(); + + QMetaObject::invokeMethod(this, "imageCaptured", Qt::QueuedConnection, + Q_ARG(int, captureId), + Q_ARG(QImage, snapPreview)); + } + + qDebugCamera() << "Image captured" << actualFileName; + + QFile f(actualFileName); + if (f.open(QFile::WriteOnly)) { + if (f.write(jpgData) != -1) { + QMetaObject::invokeMethod(this, "imageSaved", Qt::QueuedConnection, + Q_ARG(int, captureId), + Q_ARG(QString, actualFileName)); + } else { + QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection, + Q_ARG(int, captureId), + Q_ARG(int, QCameraImageCapture::OutOfSpaceError), + Q_ARG(QString, f.errorString())); + } + } else { + QString errorMessage = tr("Could not open destination file:\n%1").arg(actualFileName); + QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection, + Q_ARG(int, captureId), + Q_ARG(int, QCameraImageCapture::ResourceError), + Q_ARG(QString, errorMessage)); + } + } + }]; + + return captureId; +} + +void AVFImageCaptureControl::cancelCapture() +{ + //not supported +} + +void AVFImageCaptureControl::updateCaptureConnection() +{ + if (!m_videoConnection && + m_cameraControl->captureMode().testFlag(QCamera::CaptureStillImage)) { + qDebugCamera() << Q_FUNC_INFO; + AVCaptureSession *captureSession = m_session->captureSession(); + + if ([captureSession canAddOutput:m_stillImageOutput]) { + [captureSession addOutput:m_stillImageOutput]; + + for (AVCaptureConnection *connection in m_stillImageOutput.connections) { + for (AVCaptureInputPort *port in [connection inputPorts]) { + if ([[port mediaType] isEqual:AVMediaTypeVideo] ) { + m_videoConnection = connection; + break; + } + } + + if (m_videoConnection) + break; + } + } + + updateReadyStatus(); + } +} + +#include "moc_avfimagecapturecontrol.cpp" -- cgit v1.2.3