tvencoder.h

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2004 by Istv醤 V醨adi
//
// This file is part of dxr3Player, a DVD player written specifically 
// for the DXR3 (aka Hollywood+) decoder card, but now handles other
// hardware as well. These files contain a (mostly) user-space driver 
// for the Unichrome board found on Via's EPIA motherboards.
//
// The information for implementing this driver has been gathered
// from the following sources:
//
// - The DirectFB Unichrome driver
//   Copyright (c) 2003 Andreas Robinson, All rights reserved.
//
// - Andreas Robinson's MPEG-2 decoder for the Unichrome board.
//   Copyright (c) 2003 Andreas Robinson, All rights reserved.
//
// - Via's Unichrome Framebuffer driver
//   Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
//   Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.

// 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_UNICHROME_TVENCODER_H
#define DXR3PLAYER_UNICHROME_TVENCODER_H
//------------------------------------------------------------------------------

#include <cstdlib>

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

namespace unichrome {

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

class IO;
struct Mode;

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

/**
 * Base class for the TV encoder handlers.
 */
class TVEncoder
{
public:
    /**
     * Construct the correct TV encoder handler based on information read from
     * the I2C bus.
     *
     * @return the TV encoder handler or 0, if the TV IC is not supported.
     */
    static TVEncoder* create(IO& io);

private:
    /**
     * TV encoder IC type constant: VT1622
     */
    static const int TVENCODER_VT1622 = 3;

    /**
     * TV encoder IC type constant: VT1622A
     */
    static const int TVENCODER_VT1622A = 16;

protected:
    /**
     * The I2C address of the TV encoder chip.
     */
    static const unsigned I2C_ADDR_TVENCODER = 0x40;

    /**
     * The I2C subaddress of the TV encoder chip type.
     */
    static const unsigned I2C_SUBADDR_TVENCODER_TYPE = 0x1b;

    /**
     * The I2C bus to use to communicate with the TV encoder chip.
     */
    IO& io;

    /**
     * Construct the TV encoder object.
     */
    TVEncoder(IO& io);

public:
    /**
     * Function to call when setting a mode on the TV.
     */
    virtual void setMode(const Mode& mode) = 0;
};

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

} /* namespace unichrome */

//------------------------------------------------------------------------------
#endif // DXR3PLAYER_UNICHROME_TVENCODER_H

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