loopcontrol.h

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.7平台上编译为嵌入式图形界面操作系统。

/**********************************************************************
** Copyright (C) 2000-2002 Trolltech AS.  All rights reserved.
**
** This file is part of the Qtopia Environment.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact [e-mail] if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
#ifndef MPEGVIEW_H
#define MPEGVIEW_H


#include <qwidget.h>
#include <qdatetime.h>

class VideoWidget;

class LoopControl : public QObject {
    Q_OBJECT
public:
    LoopControl( QObject *parent, const char *name );
    ~LoopControl();

    bool init( const QString& filename, const QString& mimetype = QString::null, bool isURL = false );

    bool hasVideo() const { return hasVideoChannel; }
    bool hasAudio() const { return hasAudioChannel; }
    
    long totalPlaytime();

    enum AudioPriority { Normal, High };
    void setPriority( AudioPriority );

    // These are public to run them from global functions needed to start threads
    // Otherwise they would be private
    void startAudio();
    void startVideo();
    bool moreAudio;
    bool moreVideo;
public slots:
    void play();
    void stop( bool willPlayAgainShortly = FALSE );

    void setMute( bool );
    void setPaused( bool );
    void setPosition( long );
    
signals:
    void positionChanged( long, long );

protected:
    void timerEvent(QTimerEvent*);

private:
    void startTimers();
    void killTimers();

    QTime playtime;
    int videoId;
    int sliderId;

    int audioSampleCounter;
    long current_frame;
    long total_video_frames;
    long total_audio_samples;

    float framerate;
    int freq;
    int astream;
    int vstream; 
    int framecount;
    int channels;
     
    bool hasVideoChannel;
    bool hasAudioChannel;
    bool isMuted;
    QString fileName;
};


#endif