continuous_client_demo1-3.m

#import "Video_DemoViewController.h"
#import "AWSServiceController.h"

NSString *M3PlaybackTime = @"Duration";
NSString *M3PlayMessage =
    @"http://kellabyte.com/samples/VideoDemo/Messages/PlayMessage";
NSString *M3PauseMessage =
    @"http://kellabyte.com/samples/VideoDemo/Messages/PauseMessage";

@interface Video_DemoViewController () 

- (MPMoviePlayerController *)_moviePlayer;

@end

@implementation Video_DemoViewController 

@synthesize serviceController;
@synthesize contentView;

/***************************
 Set up
 **************************/
- (id)initWithCoder:(NSCoder *)aDecoder {
    if ((self = [super initWithCoder:aDecoder])) {
        [self addObserver:self
               forKeyPath:@"serviceController"
                  options:NSKeyValueObservingOptionOld
                  context:NULL];
    }
    return self;
}

/***************************
 Update notifications when the service controller changes
 **************************/
- (void)observeValueForKeyPath:(NSString *)keyPath
                      ofObject:(id)object
                        change:(NSDictionary *)change
                       context:(void *)context {
    if ([keyPath isEqualToString:@"serviceController"]) {
        [[SAFE_NULL([change objectForKey:NSKeyValueChangeOldKey])
                    notificationCenter] removeObserver:self];

        id centre = [[self serviceController] notificationCenter];

        [centre addObserver:self
                   selector:@selector(playMovie:)
                       name:M3PlayMessage
                     object:nil];

        [centre addObserver:self
                   selector:@selector(pauseMovie:)
                       name:M3PauseMessage
                     object:nil];
    }
}

/***************************
 Set up the movie player
 **************************/
- (void)viewDidLoad {
    MPMoviePlayerController *player = [self _moviePlayer];
    [[player view] setFrame:[[self contentView] bounds]];
    [[self contentView] addSubview:[player view]];
    [super viewDidLoad];
}

/***************************
 Set up and return the movie player
 **************************/
- (MPMoviePlayerController *)_moviePlayer {
    if (!moviePlayer) {
        NSURL *url = [NSURL URLWithString:
        @"http://someurl/tron.m4v"];
        moviePlayer = [[MPMoviePlayerController alloc]
                                  initWithContentURL:url];

        [moviePlayer setShouldAutoplay:NO];
        [moviePlayer setControlStyle:MPMovieControlStyleNone];
    }
    return moviePlayer;
}

/***************************
 Handle a play notification
 **************************/
- (void)playMovie:(NSNotification *)aNote {
    NSNumber *time = [[aNote userInfo] objectForKey:M3PlaybackTime]
    CGFloat playbackTime = [time floatValue];

    [[self _moviePlayer] setCurrentPlaybackTime:playbackTime];
    [[self _moviePlayer] play];
}

/***************************
 Handle a pause notification
 **************************/
- (void)pauseMovie:(NSNotification *)aNote {
    NSNumber *time = [[aNote userInfo] objectForKey:M3PlaybackTime]
    CGFloat playbackTime = [time floatValue];

    [[self _moviePlayer] setCurrentPlaybackTime:playbackTime];
    [[self _moviePlayer] pause];
}

/***************************
 Post a play notification when the user presses the play button
 **************************/
- (IBAction)play:(id)sender {
    CGFloat time = [[self _moviePlayer] currentPlaybackTime];
    NSNumber *timeObj = [NSNumber numberWithFloat:time];
    id info = [NSDictionary dictionaryWithObject:timeObj
                                          forKey:M3PlaybackTime]

    id centre = [[self serviceController] notificationCenter];
    [centre postNotificationName:M3PlayMessage
                          object:nil
                        userInfo:info];
}

/***************************
 Post a pause notification when the user presses the pause button
 **************************/
- (IBAction)pause:(id)sender {
    CGFloat time = [[self _moviePlayer] currentPlaybackTime];
    NSNumber *timeObj = [NSNumber numberWithFloat:time];
    id info = [NSDictionary dictionaryWithObject:timeObj
                                          forKey:M3PlaybackTime]

    id centre = [[self serviceController] notificationCenter];
    [centre postNotificationName:M3PauseMessage
                          object:nil
                        userInfo:info];
}

/***************************
 Clean up
 **************************/
- (void)dealloc {
    [contentView release];
    [super dealloc];
}

- (void)viewDidUnload {
    [self setContentView:nil];
    [super viewDidUnload];
}
@end