/*
 * engine.h
 *
 * Copyright (C) 2007 Christophe Thommeret <hftom@free.fr>
 *
 * 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 ENGINE_H
#define ENGINE_H

#include <QObject>

#include "mrl.h"



class Engine : public QObject
{
	Q_OBJECT
public:

	enum EngineState{ Unknown=0, Ready, Playing, Paused, Stopped, Error };

	Engine( QWidget *parent );
	virtual ~Engine();

	virtual bool isPlaying() { return false; }
	virtual bool isPaused() { return false; }
	// Should look like "*.mp3 *.MP3 *.avi *.AVI", used as file filter for directory import
	virtual QString supportedExtensions() { 	return QString::null; }
	// Current volume. In percent.
	virtual uint volume() const { return 0; }
	// Current position. In percent.
	virtual uint position() const { return 0; }
	virtual bool hasChapters() { return false; }
	virtual void setDVDChapter(uint) {}
	virtual bool hasVideo() { return false; }
	virtual QWidget *videoWidget() { return NULL; }

public slots:

	virtual void play( const MRL& ) {}
	virtual bool playNextChapter() { return false; }
	virtual bool playPreviousChapter() { return false; }
	virtual void togglePause() {}
	virtual void stop() {}
	// Sets Volume. In percent.
	virtual void setVolume(uint) {}
	virtual void mute() {}
	// Sets Position. In percent.
	virtual void setPosition(uint) {}
	virtual void seekRelative(int) {}
	virtual void setSubOffset(int) {}
	virtual void setSubtitle(int) {}
	virtual void setAudioChannel(int) {}


signals:

	void stateChanged( int );
	// Frame size of video changed
	void newFrameSize(const QSize& frame);
	// New meta information available
	void newMeta(const MRL &mrl);
	// Playback of current track finished
	void trackFinished();
	//  Playback failed
	void playbackFailed();
	void newCutPoint( int, int );
	void undoPoint( int );
};

#endif /* ENGINE_H */