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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "camerabinresourcepolicy.h"
//#define DEBUG_RESOURCE_POLICY
#include <QtCore/qdebug.h>
#include <QtCore/qset.h>
#ifdef HAVE_RESOURCE_POLICY
#include <policy/resource.h>
#include <policy/resources.h>
#include <policy/resource-set.h>
#endif
QT_BEGIN_NAMESPACE
CamerabinResourcePolicy::CamerabinResourcePolicy(QObject *parent) :
QObject(parent),
m_resourceSet(NoResources),
m_releasingResources(false),
m_canCapture(false)
{
#ifdef HAVE_RESOURCE_POLICY
//loaded resource set is also kept requested for image and video capture sets
m_resource = new ResourcePolicy::ResourceSet("camera");
m_resource->setAlwaysReply();
m_resource->initAndConnect();
connect(m_resource, SIGNAL(resourcesGranted(QList<ResourcePolicy::ResourceType>)),
SLOT(handleResourcesGranted()));
connect(m_resource, SIGNAL(resourcesDenied()), SIGNAL(resourcesDenied()));
connect(m_resource, SIGNAL(lostResources()), SLOT(handleResourcesLost()));
connect(m_resource, SIGNAL(resourcesReleased()), SLOT(handleResourcesReleased()));
connect(m_resource, SIGNAL(resourcesBecameAvailable(QList<ResourcePolicy::ResourceType>)),
this, SLOT(resourcesAvailable()));
connect(m_resource, SIGNAL(updateOK()), this, SLOT(updateCanCapture()));
#endif
}
CamerabinResourcePolicy::~CamerabinResourcePolicy()
{
#ifdef HAVE_RESOURCE_POLICY
//ensure the resources are released
if (m_resourceSet != NoResources)
setResourceSet(NoResources);
//don't delete the resource set until resources are released
if (m_releasingResources) {
m_resource->connect(m_resource, SIGNAL(resourcesReleased()),
SLOT(deleteLater()));
} else {
delete m_resource;
m_resource = 0;
}
#endif
}
CamerabinResourcePolicy::ResourceSet CamerabinResourcePolicy::resourceSet() const
{
return m_resourceSet;
}
void CamerabinResourcePolicy::setResourceSet(CamerabinResourcePolicy::ResourceSet set)
{
CamerabinResourcePolicy::ResourceSet oldSet = m_resourceSet;
m_resourceSet = set;
#ifdef DEBUG_RESOURCE_POLICY
qDebug() << Q_FUNC_INFO << set;
#endif
#ifdef HAVE_RESOURCE_POLICY
QSet<ResourcePolicy::ResourceType> requestedTypes;
switch (set) {
case NoResources:
break;
case LoadedResources:
requestedTypes << ResourcePolicy::LensCoverType //to detect lens cover is opened/closed
<< ResourcePolicy::VideoRecorderType; //to open camera device
break;
case ImageCaptureResources:
requestedTypes << ResourcePolicy::LensCoverType
<< ResourcePolicy::VideoPlaybackType
<< ResourcePolicy::VideoRecorderType
<< ResourcePolicy::LedsType;
break;
case VideoCaptureResources:
requestedTypes << ResourcePolicy::LensCoverType
<< ResourcePolicy::VideoPlaybackType
<< ResourcePolicy::VideoRecorderType
<< ResourcePolicy::AudioPlaybackType
<< ResourcePolicy::AudioRecorderType
<< ResourcePolicy::LedsType;
break;
}
QSet<ResourcePolicy::ResourceType> currentTypes;
foreach (ResourcePolicy::Resource *resource, m_resource->resources())
currentTypes << resource->type();
foreach (ResourcePolicy::ResourceType resourceType, currentTypes - requestedTypes)
m_resource->deleteResource(resourceType);
foreach (ResourcePolicy::ResourceType resourceType, requestedTypes - currentTypes) {
if (resourceType == ResourcePolicy::LensCoverType) {
ResourcePolicy::LensCoverResource *lensCoverResource = new ResourcePolicy::LensCoverResource;
lensCoverResource->setOptional(true);
m_resource->addResourceObject(lensCoverResource);
} else if (resourceType == ResourcePolicy::AudioPlaybackType) {
ResourcePolicy::Resource *resource = new ResourcePolicy::AudioResource;
resource->setOptional(true);
m_resource->addResourceObject(resource);
} else if (resourceType == ResourcePolicy::AudioRecorderType) {
ResourcePolicy::Resource *resource = new ResourcePolicy::AudioRecorderResource;
resource->setOptional(true);
m_resource->addResourceObject(resource);
} else {
m_resource->addResource(resourceType);
}
}
m_resource->update();
if (set != NoResources) {
m_resource->acquire();
} else {
if (oldSet != NoResources) {
m_releasingResources = true;
m_resource->release();
}
}
#else
Q_UNUSED(oldSet);
updateCanCapture();
#endif
}
bool CamerabinResourcePolicy::isResourcesGranted() const
{
#ifdef HAVE_RESOURCE_POLICY
foreach (ResourcePolicy::Resource *resource, m_resource->resources())
if (!resource->isOptional() && !resource->isGranted())
return false;
#endif
return true;
}
void CamerabinResourcePolicy::handleResourcesLost()
{
updateCanCapture();
emit resourcesLost();
}
void CamerabinResourcePolicy::handleResourcesGranted()
{
updateCanCapture();
emit resourcesGranted();
}
void CamerabinResourcePolicy::handleResourcesReleased()
{
#ifdef HAVE_RESOURCE_POLICY
#ifdef DEBUG_RESOURCE_POLICY
qDebug() << Q_FUNC_INFO;
#endif
m_releasingResources = false;
#endif
updateCanCapture();
}
void CamerabinResourcePolicy::resourcesAvailable()
{
#ifdef HAVE_RESOURCE_POLICY
if (m_resourceSet != NoResources) {
m_resource->acquire();
}
#endif
}
bool CamerabinResourcePolicy::canCapture() const
{
return m_canCapture;
}
void CamerabinResourcePolicy::updateCanCapture()
{
const bool wasAbleToRecord = m_canCapture;
m_canCapture = (m_resourceSet == VideoCaptureResources) || (m_resourceSet == ImageCaptureResources);
#ifdef HAVE_RESOURCE_POLICY
foreach (ResourcePolicy::Resource *resource, m_resource->resources()) {
if (resource->type() != ResourcePolicy::LensCoverType)
m_canCapture = m_canCapture && resource->isGranted();
}
#endif
if (wasAbleToRecord != m_canCapture)
emit canCaptureChanged();
}
QT_END_NAMESPACE
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