/usr/include/qmmp/abstractengine.h is in libqmmp-dev 0.7.4-1.
This file is owned by root:root, with mode 0o644.
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* Copyright (C) 2009-2012 by Ilya Kotov *
* forkotov02@hotmail.ru *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU 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 General Public License for more details. *
* *
* You should have received a copy of the GNU 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. *
***************************************************************************/
#ifndef ABSTRACTENGINE_H
#define ABSTRACTENGINE_H
#include <QMutex>
//#include <QWaitCondition>
#include <QThread>
#include <QStringList>
#include "enginefactory.h"
#include "qmmpsettings.h"
class QIODevice;
class InputSource;
/*! @brief The AbstractEngine class provides the base interface class of audio audio engines.
* @author Ilya Kotov <forkotov02@hotmail.ru>
*/
class AbstractEngine : public QThread
{
Q_OBJECT
public:
/*!
* Object contsructor.
* @param parent Parent object.
*/
AbstractEngine(QObject *parent = 0);
/*!
* Destructor.
*/
virtual ~AbstractEngine();
/*!
* Prepares decoder for usage.
* Subclass should reimplement this function.
*/
virtual bool enqueue(InputSource *source) = 0;
/*!
* Returns the total time in milliseconds.
* Subclass should reimplement this function.
*/
virtual qint64 totalTime() = 0;
/*!
* Starts playback. Returns \b true if playback has been started successful,
* otherwise returns \b false.
*/
virtual bool play() = 0;
/*!
* Requests a seek to the time \b time indicated, specified in milliseconds.
*/
virtual void seek(qint64 time) = 0;
/*!
* Requests playback to stop
*/
virtual void stop() = 0;
/*!
* Pauses/resumes playback
*/
virtual void pause() = 0;
/*!
* Returns mutex pointer.
*/
QMutex *mutex();
/*!
* Creates Engine object.
* @param s InputSource object.
* @param parent Parent object.
* Returns \b 0 if the given source is not supported.
*/
static AbstractEngine *create(InputSource *s, QObject *parent = 0);
/*!
* Returns a list of engine factories.
*/
static QList<EngineFactory*> *factories();
/*!
* Returns EngineFactory pointer which supports file \b path or 0 if file \b path is unsupported
*/
static EngineFactory *findByPath(const QString &path);
/*!
* Sets whether the engine is enabled.
* @param factory Engine plugin factory.
* @param enable Plugin enable state (\b true - enable, \b false - disable)
*/
static void setEnabled(EngineFactory* factory, bool enable = true);
/*!
* Returns \b true if engine is enabled, otherwise returns \b false
* @param factory Engine plugin factory.
*/
static bool isEnabled(EngineFactory* factory);
/*!
* Returns plugin file path.
* @param factory Engine plugin factory.
*/
static QString file(EngineFactory *factory);
/*!
* Returns a list of supported protocols (including meta-protocols).
* This fuction ignores disabled engines.
*/
static QStringList protocols();
private:
QMutex m_mutex;
static void checkFactories();
static QList<EngineFactory*> *m_factories;
static QList<EngineFactory*> *m_disabledFactories;
static QHash <EngineFactory*, QString> *m_files;
};
#endif // ABSTRACTENGINE_H
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