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/*
* KMix -- KDE's full featured mini mixer
*
*
* Copyright (c) The KMix Authors
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "ControlPool.h"
#include <QString>
#include <QMap>
shared_ptr<MixDevice> ControlPool::TheEmptyDevice; // = shared_ptr<MixDevice>(ControlPool::TheEmptyDevicePtr);
ControlPool::ControlPool()
{
pool = new QMap<QString, shared_ptr<MixDevice> >();
}
ControlPool* ControlPool::_instance = 0;
ControlPool* ControlPool::instance()
{
if ( _instance == 0 )
ControlPool::_instance = new ControlPool();
return ControlPool::_instance;
}
/**
* Adds a Control to the pool, and returns it wrapped in QSharedPointer.
* if the Control was already in the Pool, the existing Control is returned
*
* @param key A key, unique over all controls of all cards, e.g. "Master:0@ALSA::Creative_XFI:0"
* @param mixDevice
* @return
*/
shared_ptr<MixDevice> ControlPool::add(const QString& key, MixDevice* md)
{
shared_ptr<MixDevice> controlFromPool(get(key));
if ( controlFromPool.get() != 0)
{
qCDebug(KMIX_LOG) << "----ControlPool already cached key=" << key;
return controlFromPool;
}
// else: Add the control to the pool
qCDebug(KMIX_LOG) << "----ControlPool add key=" << key;
shared_ptr<MixDevice> mdShared(md);
pool->insert(key, mdShared);
return mdShared;
}
/**
* Retrieves a Control from the pool as QSharedPointer. If the Control is not
* in the pool, a QSharedPointer that points to null (0) is returned.
*
* @param key
* @return The Control wrapped in QSharedPointer. If not found, a QSharedPointer that points to null.
*/
shared_ptr<MixDevice> ControlPool::get(const QString& key)
{
shared_ptr<MixDevice> mixDeviceShared = pool->value(key, TheEmptyDevice);
return mixDeviceShared;
}
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