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On April 16, AACS LA announced that it had taken action to expire the encryption keys (is expire now a transitive verb ) of specific implementations of AACS-enabled software The revocation feature of AACS was being activated, which allowed the encryption key structure to be changed on new discs so that they would not play on compromised players The AACS LA posted links to websites of CyberLink and Corel, where users could download security updates that kept their players working with new discs and did a better job of obfuscating AACS keys Of course, the new versions of the software applications were soon cracked as well, and cracking websites with lists of keys popped up in new places like moles in a carnival game, but at least AACS was able to stay ahead of the game, unlike CSS, which lost most of its efficacy once all the player keys were compromised In May, the new head of the Motion Picture Association of America (MPAA), Dan Glickman, said that the AACS support behind managed copy would be ready before the end of the year Once again, the pessimists in the audience were doubtful and, once again, even their extensions of Glickman s assertion turned out to be madly optimistic On June 30, 2007, BD+ Technologies, the company licensing the additional content protection layer for Blu-ray, announced that it had completed the specifications for BD+ Luckily the industry had not waited for them In August, the HD DVD backers worked to swing the pendulum back in their direction Microsoft cut the price of its HD DVD add-on drive for the Xbox 360 from $199 to $179 and threw in five free movies Toshiba allegedly offered Paramount and Dreamworks each $75 million to drop Blu-ray in favor of HD DVD, which they both did with announcements on August 20 On September 7, in response to another round of attacks because of inadequate security in the CyberLink PowerDVD software player, AACS LA announced it was again revoking keys AACS also announced that it was activating another feature of AACS, proactive renewals, which required software products to periodically release updates that refreshed the AACS encryption keys Software that was not updated would no longer be able to play newly released discs The software companies who knew it was coming grumbled but complied, since by this time it was common to provide automatic downloadable software updates In October 2007, Panasonic released the DMP-BD30K, the first Blu-ray Profile 11 (BonusView) player on the market, beating its competitors by a few months, even Sony s PS3, which did not receive a software update to Profile 11 until December 18 However, discs using Profile 11 features were nowhere to be found In November 2007, apparently feeling pressure from the gradually increasing sentiment that Blu-ray was winning the format war, Toshiba held closeout sales of old-model HD DVD players at several major retailers in the US Limited quantities of players were sold for less than $100, causing a few stampedes and minor injuries The HD DVD promotion group announced that 750,000 HD DVD players had been sold, which included standalone players and the Xbox 360 add-on Also in November, SlySoft, the makers of the popular but, in many cases, illegal AnyDVD ripping software, released a new version that could crack and rip the few Blu-ray discs protected by BD+ Of course BD+ was designed to be changed when the algorithms were cracked, but SlySoft claimed they d figured out the basics and could handle any variation that BD+ threw at them.

IMPLEMENTING THE SLIDE SHOW BEHAVIOR Our user interface is ready to go. The following table details the steps required to implement this form to present a slide show to the user:

27:

To compare the entire contents of one string object to another, you will normally use the overloaded relational operators described earlier However, if you want to compare a portion of one string to another, then you will need to use the compare( ) member function, shown here int compare(size_type start, size_type num, const string &strob) const; Here, num characters in strob, beginning at start, will be compared against the invoking string If the invoking string is less than strob, compare( ) will return less than zero If the invoking string is greater than strob, it will return greater than zero If strob is equal to the invoking string, compare( ) will return zero

using Manning.MyPhotoAlbum; In the SlideShowForm.cs code window, Indicate that we will use the MyPhotoAlbum library in this file.

1-23

Although string objects are useful in their own right, there will be times when you will need to obtain a null-terminated character array version of the string For example, you might use a string object to construct a filename However, when opening a file, you will need to specify a pointer to a standard, null-terminated string To solve this problem, the member function c_str( ) is provided Its prototype is shown here const char *c_str( ) const; This function returns a pointer to a null-terminated version of the string contained in the invoking string object The null-terminated string must not be altered It is also not guaranteed to be valid after any other operations have taken place on the string object

Create two private fields in the class to hold the album and the current display position. Modify the constructor to accept a

The string class meets all of the basic requirements to be a container Thus it supports the common container functions, such as begin( ), end( ), and size( ) It also supports iterators Thus, a string object can also be manipulated by the STL algorithms Here is a simple example

private PhotoAlbum _album; private int _albumPos;

// Strings as containers #include <iostream> #include <string> #include <algorithm> using namespace std; int main() {