dvddrive.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_DVDDRIVE_H
#define DXR3PLAYER_DVD_DVDDRIVE_H
//------------------------------------------------------------------------------

#include "Device.h"
#include "DVD.h"
#include "FileHandler.h"

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

typedef struct dvd_reader_s dvd_reader_t;

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

namespace dvd {

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

/**
 * A real DVD drive device.
 */
class DVDDrive : public Device
{
private:
    /**
     * Our own file handler.
     */
    class FileHandler : public dvd::FileHandler
    {
    private:
        /**
         * The low-level file structure.
         */
        dvd_file_t* file;

    public:
        /**
         * Construct the wrapper with the given file, which should not
         * be 0.
         */
        FileHandler(dvd_file_t* file);

        /**
         * Destroy the wrapper by closing the file.
         */
        ~FileHandler();

        /**
         * @see dvd::FileHandler::getLength
         */
        virtual size_t getLength();

        /**
         * @see dvd::FileHandler::readSectors
         */
        virtual void readSectors(void* dest, size_t offset, size_t numSectors);
    };

public:
    /**
     * Check if the given path belongs to a DVD drive or not.
     */
    static bool isDVDDrive(const char* path);

private:
    /**
     * Get the path for the DVD drive based on the given path.
     *
     * If the path is not 0 or an empty string and it points to a
     * device which is a DVD, that path is used. Otherwise the
     * following paths are tried (in this order):
     * - /dev/dvd
     * - /dev/hda
     * - /dev/hdb
     * - /dev/hdc
     * - /dev/hdd
     *
     * If no DVD is found, abort with an error message.
     *
     * @return the first path which is a DVD drive. It is a newly
     * allocated string.
     */
    static char* findDVD(const char* path);

private:    
    /**
     * The DVD path.
     */
    char* path;
    
    /**
     * The DVD reader to use. 
     */
    dvd_reader_t* reader;

    /**
     * The IFO handles.
     */
    ifo_handle_t* ifoHandles[DVD::maxNumberOfVTSs + 1];

public:
    /**
     * Construct the device with the given path.
     */
    DVDDrive(const char* p = 0);

    /**
     * Destroy the drive
     */
    ~DVDDrive();

    /**
     * @see Device::hasDisk
     */
    virtual bool hasDisk();

    /**
     * @see Device::isOpen
     */
    virtual bool isOpen() const;
    
    /**
     * @see Device::open
     */
    virtual bool open();

    /**
     * @see Device::getID
     */
    virtual void getID(unsigned char* dest) const;

    /**
     * @see Device::getIFOHandle
     */
    virtual const ifo_handle_t* getIFOHandle(unsigned titleNo) const;
    
    /**
     * @see Device::openFile
     */
    virtual dvd::FileHandler* openFile(unsigned titleNo, bool isMenu) const;

    /**
     * @see Device::close
     */
    virtual void close();

    /**
     * @see Device::eject
     */
    virtual void eject();

private:
    /**
     * Open and read the IFO handles.
     *
     * @return if reading succeeded
     */
    bool readIFOHandles();

    /**
     * Close the IFO handles.
     */
    void closeIFOHandles();
};

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

} /* namespace dvd */

//------------------------------------------------------------------------------
#endif // DXR3PLAYER_DVD_DVDDRIVE_H

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