commandbasedosdhandler.h

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2005 by Istv醤 V醨adi
//
// This file is part of dxr3Player, a DVD player written specifically 
// for the DXR3 (aka Hollywood+) decoder card.

// 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifndef OUTPUT_OSD_COMMANDBASEDOSDHANDLER_H
#define OUTPUT_OSD_COMMANDBASEDOSDHANDLER_H
//------------------------------------------------------------------------------

#include "CommandHandler.h"

#include "output/OSDHandler.h"

#include "sched/Schedulable.h"
#include "sched/WaitCondition.h"

#include "util/DefaultAllocator.h" 

#include <vector>

//------------------------------------------------------------------------------

namespace output { namespace osd {

//------------------------------------------------------------------------------

class Command;

//------------------------------------------------------------------------------

/**
 * An OSD handler that is based on commands.
 */
class CommandBasedOSDHandler : public output::OSDHandler,
                               public CommandHandler,
                               public sched::Schedulable
{
private:
    /**
     * Type for the vector of commands.
     */
    typedef std::vector<Command*, DefaultAllocatorTemplate<Command*> > commands_t;

    /**
     * The vector of commands.
     */
    commands_t commands;

    /**
     * Wait condition for the availablility of a command.
     */
    sched::WaitCondition commandAvailable;

protected:
    /**
     * Construct the OSD handler.
     */
    CommandBasedOSDHandler(const char* name);

public:
    /**
     * Perform the command handling.
     */
    virtual void run();

    /**
     * Update the DVD position.
     */
    virtual void updateDVDPosition(const DVDPosition& dvdPosition);

    /**
     * Update the DVD languages.
     */
    virtual void updateDVDLanguages(unsigned audioLanguageCode,
                                    unsigned spuLanguageCode);

    /**
     * Update the volume.
     */
    virtual void updateVolume(unsigned volume);

    /**
     * Show the OSD. Note, that it may actually mean to hide the OSD
     */
    virtual void show();

    /**
     * Set the playmode.
     */
    virtual void setPlayMode(playMode_t playMode);

private:
    /**
     * Add a new command to the command queue and notify the
     * schedulable to wake up.
     */
    void addCommand(Command* command);

    /**
     * Finalize the updates. This default implementation does nothing.
     */
    virtual millis_t finalizeUpdates();

    /**
     * Handle a timeout. This default implementation does nothing.
     */
    virtual millis_t handleTimeout();
};

//------------------------------------------------------------------------------

} /* namespace output::osd */ } /* namespace output */

//------------------------------------------------------------------------------
#endif // OUTPUT_OSD_COMMANDBASEDOSDHANDLER_H

// Local variables:
// mode: c++
// End: