singleton.cpp
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright 2012 The MITRE Corporation *
* *
* Licensed under the Apache License, Version 2.0 (the "License"); *
* you may not use this file except in compliance with the License. *
* You may obtain a copy of the License at *
* *
* http://www.apache.org/licenses/LICENSE-2.0 *
* *
* Unless required by applicable law or agreed to in writing, software *
* distributed under the License is distributed on an "AS IS" BASIS, *
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
* See the License for the specific language governing permissions and *
* limitations under the License. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include <openbr/plugins/openbr_internal.h>
namespace br
{
/*!
* \ingroup transforms
* \brief A globally shared transform.
* \author Josh Klontz \cite jklontz
*/
class SingletonTransform : public MetaTransform
{
Q_OBJECT
Q_PROPERTY(QString description READ get_description WRITE set_description RESET reset_description STORED false)
BR_PROPERTY(QString, description, "Identity")
static QMutex mutex;
static QHash<QString,Transform*> transforms;
static QHash<QString,int> trainingReferenceCounts;
static QHash<QString,TemplateList> trainingData;
Transform *transform;
void init()
{
QMutexLocker locker(&mutex);
if (!transforms.contains(description)) {
transforms.insert(description, make(description));
trainingReferenceCounts.insert(description, 0);
}
transform = transforms[description];
trainingReferenceCounts[description]++;
}
void train(const TemplateList &data)
{
QMutexLocker locker(&mutex);
trainingData[description].append(data);
trainingReferenceCounts[description]--;
if (trainingReferenceCounts[description] > 0) return;
transform->train(trainingData[description]);
trainingData[description].clear();
}
void project(const Template &src, Template &dst) const
{
transform->project(src, dst);
}
void store(QDataStream &stream) const
{
if (transform->parent() == this)
transform->store(stream);
}
void load(QDataStream &stream)
{
if (transform->parent() == this)
transform->load(stream);
}
};
QMutex SingletonTransform::mutex;
QHash<QString,Transform*> SingletonTransform::transforms;
QHash<QString,int> SingletonTransform::trainingReferenceCounts;
QHash<QString,TemplateList> SingletonTransform::trainingData;
BR_REGISTER(Transform, SingletonTransform)
} // namespace br
#include "core/singleton.moc"