spuhandler.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_OUTPUT_DXR3_SPUHANDLER_H
#define DXR3PLAYER_OUTPUT_DXR3_SPUHANDLER_H
//------------------------------------------------------------------------------

#include "output/dxr3/TimedStreamHandler.h"

#include "output/StateTracker.h"

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

namespace dxr3 {

class Video;

}

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

namespace dvd { namespace packet {

class TimedDataBlockPacket;

} }

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

namespace output { namespace dxr3 {

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

class Timer;

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

/**
 * Vide data handler.
 */
class SPUHandler : public TimedStreamHandler,
                   public StateTracker::ButtonHandler
{
private:
    /**
     * The sizeo of the SPU buffer.
     */
    static const size_t bufferSize = 53220;

    /**
     * The video device.
     */
    ::dxr3::Video& videoDevice;

    /**
     * Indicate if only forced SPU's are displayed.
     */
    bool forcedOnly;

    /**
     * The buffer.
     */
    unsigned char buffer[bufferSize];

    /**
     * The current offset in the buffer.
     */
    size_t offset;

    /**
     * The PTS of the current buffer.
     */
    pts_t pts;

public:
    /**
     * Construct the video handler.
     */
    SPUHandler(Timer& timer, 
               dvd::packet::PacketQueue& inputQueue, 
               ::dxr3::Video& videoDevice);

    /**
     * @see Schedulable::run
     */
    virtual void run();

    /**
     * Highlight a certain button.
     */
    virtual void highlightButton(int color, int contrast,
                                 size_t top, size_t bottom,
                                 size_t left, size_t right);
    
    /**
     * Clear the button currently displayed.
     */
    virtual void clearButton();

private:
    /**
     * Read a 16-bit value from the buffer at the given offset.
     */
    unsigned read16(size_t offset) const;

    /**
     * Copy the given data into the buffer. The buffer offset will be stepped.
     *
     * @param data the address to copy from. It is a reference to a
     * variable which will be stepped by the number of bytes copied.
     *
     * @return the number of bytes copied
     */
    size_t copyIntoBuffer(const unsigned char*& data, size_t toCopy);

    /**
     * Check if the SPU buffer has data to be displayed in a forced
     * manner.
     */
    bool isForced() const;

    /**
     * Process the given data packet.
     */
    void processDataPacket(Reference<dvd::packet::TimedDataBlockPacket> packet);
};

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

} /* namespace output::dxr3 */ } /* namespace dxr3 */

//------------------------------------------------------------------------------
#endif // DXR3PLAYER_OUTPUT_DXR3_SPUHANDLER_H

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