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/****************************************************************************
**
** 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 <QtCore/qurl.h>
#include <QtCore/qfile.h>
#include <QtCore/qbuffer.h>
#include <QtGui/qimagereader.h>
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"
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