/*

File: MyQTMovie.m

Abstract: Code to manage movie playback notifications during movie

            playback

Version: <1.0>

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*/ 

#import "MyQTMovie.h"

#import "QTMovieExtensions.h"

@implementation MyQTMovie

- (id)init 

{

    self = [super init];

    if (self==nil) return nil;

    playbackSelector            = nil;

    movieStoppedSelector        = nil;

    movieDidEndSelector         = nil;

    mcActionFilterCallBack      = nil;

    movieDidEndTargetObject     = nil;

    playbackTargetObject        = nil;

    movieStoppedTargetObject    = nil;

    return self; 

}

-(void)dealloc

{

    MovieController mc = [self quickTimeMovieController];

    if (mc)

    {

        // remove existing registered callback

        MCSetActionFilterWithRefCon(mc,nil,0);

    }

    if (mcActionFilterCallBack)

    {

        // toss UPP for callback

        DisposeMCActionFilterWithRefConUPP(mcActionFilterCallBack);

    }

    // remove all notification associations

    NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

    [nc removeObserver:self];

    [super dealloc];

}

#pragma mark *** Movie Callback routines ***

    // removes the movie-end, movie rate-change notifications as

    // well as the movie controller action filter

-(void)removeAllMovieCallbacks

{

    [self removeMovieDidEndNotification];

    [self removeMovieRateChangeNotification];

    [self removeMCActionFilter];

}

#pragma mark *** movieDidEnd ***

    // install the QTMovieDidEndNotification notification

-(void)installMovieDidEndNotification

{

    NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

    [nc addObserver:self selector:@selector(movieDidEnd:) 

            name:@"QTMovieDidEndNotification" object:nil];

}

    // specify the selector to be called when the QTMovieDidEndNotification

    // notification arrives

-(void)setMovieDidEndNotificationCallback:(SEL)aSelector withObject:(id)anObject

{

    if (!movieDidEndSelector || !movieDidEndTargetObject)

    {

        // install the notification

        [self installMovieDidEndNotification];

    }

    [self setMovieDidEndSelector:aSelector withObject:anObject];

}

    // delete the QTMovieDidEndNotification notification

-(void)removeMovieDidEndNotification

{

    NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

    [nc removeObserver:self name:@"QTMovieDidEndNotification" object:nil];

    movieDidEndSelector = nil;

    movieDidEndTargetObject = nil;

}

    // call the selector specified for movie-end

-(void)callMovieDidEndSelector

{

    if (movieDidEndTargetObject && movieDidEndSelector)

    {

        [movieDidEndTargetObject performSelector:movieDidEndSelector withObject:self];

    }

}

    // set the selector to be called for for movie-end notifications

-(void)setMovieDidEndSelector:(SEL)aSelector withObject:(id)anObject

{

    movieDidEndSelector = aSelector;

    movieDidEndTargetObject = anObject;

}

    // movieDidEnd is called for QTMovieDidEndNotification notifications.

    // this, in turn, will call the specified selector

- (void)movieDidEnd:(NSNotification *)notification

{

    [self callMovieDidEndSelector];

}

#pragma mark *** rateChange ***

    // install the QTMovieRateDidChangeNotification notification

-(void)installRateChangeNotification

{

    NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

    [nc addObserver:self selector:@selector(movieRateChanged:) 

            name:@"QTMovieRateDidChangeNotification" object:nil];

}

    // specify the selector to be called when the QTMovieRateDidChangeNotification

    // notification arrives

-(void)setMovieRateChangeNotificationCallback:(SEL)aSelector withObject:(id)anObject

{

    if (!movieStoppedSelector || !movieStoppedTargetObject)

    {

        [self installRateChangeNotification];

    }

    [self setMovieStoppedSelector:aSelector withObject:anObject];

}

    // remove the QTMovieRateDidChangeNotification notification

-(void)removeMovieRateChangeNotification

{

    NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

    [nc removeObserver:self name:@"QTMovieRateDidChangeNotification" object:nil];

    movieStoppedSelector = nil;

    movieStoppedTargetObject = nil;

}

    // call the selector specified for movie stopped 

    // (QTMovieRateDidChangeNotification) notifications

-(void)callMovieStoppedSelector

{

    if (movieStoppedTargetObject && movieStoppedSelector)

    {

        [movieStoppedTargetObject performSelector:movieStoppedSelector withObject:self];

    }

}

    // set the selector to be called for movie stopped

    // notifications

-(void)setMovieStoppedSelector:(SEL)aSelector withObject:(id)anObject

{

    movieStoppedSelector = aSelector;

    movieStoppedTargetObject = anObject;

}

    // movieRateChanged is called for QTMovieRateDidChangeNotification

    // notifications -- then the user specified routine is called

- (void)movieRateChanged:(NSNotification *)notification

{

    NSDictionary *userInfo = [notification userInfo];

    NSNumber *newRate = [userInfo objectForKey:QTMovieRateDidChangeNotificationParameter];

    if ([newRate intValue] == 0)

    {

        [self callMovieStoppedSelector];

    }   

}

#pragma mark *** playback notification ***

    // set an action filter function for the movie controller

-(void)installMCActionFilter

{

    if (!mcActionFilterCallBack)

    {

        mcActionFilterCallBack =  NewMCActionFilterWithRefConUPP(&MyMCActionFilterCallBack);

    }

    if (!mcActionFilterCallBack) goto bail;

    ComponentResult cr = MCSetActionFilterWithRefCon([self quickTimeMovieController],

                                         mcActionFilterCallBack,

                                         (long)self);

    if (cr != noErr)

    {

        DisposeMCActionFilterWithRefConUPP(mcActionFilterCallBack);

        mcActionFilterCallBack = nil;

    }

bail:

    return;

}

    // specify the selector to be called during playback

-(void)setMoviePlaybackNotificationCallback:(SEL)aSelector withObject:(id)anObject

{

    if (!playbackTargetObject || !playbackSelector)

    {

        [self installMCActionFilter];

    }

    [self setPlaybackSelector:aSelector withObject:anObject];

}

    // remove our movie controller action filter

-(void)removeMCActionFilter

{

    // remove existing callback by passing nil for the

    // callback parameter

    MCSetActionFilterWithRefCon([self quickTimeMovieController],

                                                     nil,

                                                     (long)self);

    DisposeMCActionFilterWithRefConUPP(mcActionFilterCallBack);

    mcActionFilterCallBack = nil;

    playbackTargetObject = nil;

    playbackSelector = nil;

}

    // call the specified playback selector

-(void)callPlaybackSelector

{

    if (playbackTargetObject && playbackSelector)

    {

        [playbackTargetObject performSelector:playbackSelector withObject:self];

    }

}

    // set the selector to be called during playback

-(void)setPlaybackSelector:(SEL)aSelector withObject:(id)anObject

{

    playbackSelector = aSelector;

    playbackTargetObject = anObject;

}

@end

 // our movie controller action filter function

pascal Boolean MyMCActionFilterCallBack (MovieController    mc,

                                         short              action,

                                         void               *params,

                                         long               refCon )

{

#pragma unused(mc, params)

    Boolean        isHandled = false;      // false => allow controller to process the action

    switch(action)

    {

        case mcActionIdle:

            // refCon = our Controller object

            // Call the playback selector

            [(MyQTMovie *)refCon callPlaybackSelector];

         break;

         default:

         break;

    }

    return (isHandled);

}