processorcommand.h

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2003 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 DXR3PLAYER_DVD_VM_PROCESSORCOMMAND_H
#define DXR3PLAYER_DVD_VM_PROCESSORCOMMAND_H
//------------------------------------------------------------------------------

#include "dvd/vm/State.h"

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

namespace dvd { namespace vm {

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

class Processor;
class State;

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

/**
 * A processor command.
 */
class ProcessorCommand
{
public:
    /**
     * Invalid ID.
     */
    static const size_t INVALID_ID = (size_t)-1;

private:
    /**
     * The ID of the next command.
     */
    static size_t nextID;

private:
    /**
     * A unique identifier of the command. 
     */
    size_t id;

    /**
     * The state after executing the command.
     */
    State state;

public:
    /**
     * Construct the command.
     */
    ProcessorCommand(const State& state);

    /**
     * Virtual destructor.
     */
    virtual ~ProcessorCommand() {}

    /**
     * Get the ID of the command.
     */
    size_t getID() const;

    /**
     * Check if the command has the given ID.
     */
    bool checkID(size_t x) const;

    /**
     * Get the state after executing the command.
     */
    const State& getState() const;

    /**
     * Set the state.
     */
    void setState(const State& s);

    /**
     * Update the given processor.
     */
    virtual void update(Processor& processor) = 0;
};

//------------------------------------------------------------------------------
// Inline definitions
//------------------------------------------------------------------------------

inline ProcessorCommand::ProcessorCommand(const State& state) :
    id(nextID++),
    state(state)
{
}

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

inline size_t ProcessorCommand::getID() const
{
    return id;
}

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

inline bool ProcessorCommand::checkID(size_t x) const
{
    return id==x;
}

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

inline const State& ProcessorCommand::getState() const
{
    return state;
}

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

inline void ProcessorCommand::setState(const State& s)
{
    state = s;
}

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

} /* namespace dvd::vm */ } /* namespace dvd */

//------------------------------------------------------------------------------
#endif // DXR3PLAYER_DVD_VM_PROCESSORCOMMAND_H

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