packetconverter.h

来自「Linux下比较早的基于命令行的DVD播放器」· C头文件 代码 · 共 92 行

//
// 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_PACKET_PACKETCONVERTER_H
#define DXR3PLAYER_DVD_PACKET_PACKETCONVERTER_H
//------------------------------------------------------------------------------

#include "dvd/packet/PacketProcessor.h"

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

namespace dvd { namespace packet {

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

class Packet;

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

/**
 * Packet converter to a certain type.
 */
template <class PacketType>
class PacketConverter : public PacketProcessor
{
private:
    /**
     * The packet reference to fill by the converted packet.
     */
    Reference<PacketType> packet;

public:
    /**
     * The converter function redefined for the right type.
     */
    virtual void processPacket(Reference<PacketType> p);

    /**
     * Convert the given packet to the requested type, if the packet
     * is of that type.
     */
    Reference<PacketType> convert(Reference<Packet> p);
};

//------------------------------------------------------------------------------
// Template definitions
//------------------------------------------------------------------------------

template <class PacketType>
void PacketConverter<PacketType>::processPacket(Reference<PacketType> p)
{
    packet = p;
}

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

template <class PacketType>
inline Reference<PacketType> 
PacketConverter<PacketType>::convert(Reference<Packet> p)
{
    if (p.isValid()) p->processOn(*this); 
    return packet;
}

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

} /* namespace dvd::packet */ } /* namespace dvd */

//------------------------------------------------------------------------------
#endif // DXR3PLAYER_DVD_PACKET_PACKETCONVERTER_H

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