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/*
*
* $Id: k3blibdvdcss.h 619556 2007-01-03 17:38:12Z trueg $
* Copyright (C) 2004 Sebastian Trueg <trueg@k3b.org>
*
* This file is part of the K3b project.
* Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
*
* 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.
* See the file "COPYING" for the exact licensing terms.
*/
#ifndef _K3B_LIBDVDCSS_H_
#define _K3B_LIBDVDCSS_H_
#include "k3b_export.h"
namespace K3bDevice {
class Device;
}
/**
* Wrapper class for libdvdcss. dynamically openes the library if it
* is available on the system.
*/
class LIBK3B_EXPORT K3bLibDvdCss
{
public:
~K3bLibDvdCss();
static const int DVDCSS_BLOCK_SIZE = 2048;
static const int DVDCSS_NOFLAGS = 0;
static const int DVDCSS_READ_DECRYPT = (1 << 0);
static const int DVDCSS_SEEK_MPEG = (1 << 0);
static const int DVDCSS_SEEK_KEY = (1 << 1);
/**
* Try to open a Video DVD and authenticate it.
* @return true if the Video DVD could be authenticated successfully, false otherwise.
*/
bool open( K3bDevice::Device* dev );
void close();
int seek( int sector, int flags );
int read( void* buffer, int sectors, int flags );
/**
* This method optimized the seek calls to maximize reading performance.
* It also makes sure we never read unscrambled and scrambled data at the same time.
*
* You have to call crackAllKeys() before using this. Do never call this in combination
* with seek or read!
*/
int readWrapped( void* buffer, int firstSector, int sectors );
/**
* Cache all CSS keys to guarantee smooth reading further on.
* This method also creates a title offset list which is needed by readWrapped.
*/
bool crackAllKeys();
/**
* returns 0 if the libdvdcss could not
* be found on the system.
* Otherwise you have to take care of
* deleting.
*/
static K3bLibDvdCss* create();
private:
class Private;
Private* d;
K3bLibDvdCss();
static void* s_libDvdCss;
static int s_counter;
};
#endif
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