提交: 152e2d6f124296060c9e0d5fb122dbec3bd77c63 - CocoaAndAVFoundation (git)

CocoaでAVFoundationを使うサンプル

Commit MetaInfo

• 修訂: 152e2d6f124296060c9e0d5fb122dbec3bd77c63 (tree)
• 時間: 2012-06-11 21:41:30
• 作者: Hori <masaki@MBP....>
• Commiter: Hori

Log Message

ソースコード整理

Change Summary

• modified: testAVFoundation/HMDocument.m

差異

--- a/testAVFoundation/HMDocument.m
+++ b/testAVFoundation/HMDocument.m
@@ -26,8 +26,6 @@
 @implementation HMDocument
 @synthesize view = _view;
 @synthesize playButton = _playButton;
-@synthesize timeGage = _timeGage;
-@synthesize timeBar = _timeBar;
 @synthesize currentTime = _currentTime;
 
 @synthesize asset = _asset;
@@ -38,6 +36,10 @@
 
 - (void)dealloc
 {
+	[[NSNotificationCenter defaultCenter] removeObserver:self
+													name:AVPlayerItemDidPlayToEndTimeNotification
+												  object:_item];
+	
 	[_player release];
 	[_item release];
 	[_asset release];
@@ -66,42 +68,6 @@
 {
 	self.asset = [AVURLAsset URLAssetWithURL:url options:nil];
 	
-	NSString *tracksKey = @"tracks";
-	[_asset loadValuesAsynchronouslyForKeys:[NSArray arrayWithObject:tracksKey]
-						 completionHandler:
-	 ^ {
-		 dispatch_async(dispatch_get_main_queue(),
-						^{
-							self.item = [AVPlayerItem playerItemWithAsset:_asset];
-							[_item addObserver:self
-								   forKeyPath:@"status"
-									  options:0
-									  context:_item];
-							[[NSNotificationCenter defaultCenter] addObserver:self
-																	 selector:@selector(playerItemDidReachEnd:)
-																		 name:AVPlayerItemDidPlayToEndTimeNotification
-																	   object:_item];
-							
-							self.player = [AVPlayer playerWithPlayerItem:_item];
-							[_player addObserver:self
-									  forKeyPath:@"rate"
-										 options:0
-										 context:_player];
-							
-							[_player addPeriodicTimeObserverForInterval:CMTimeMake(4, 100)
-																  queue:dispatch_get_main_queue()
-															 usingBlock: ^(CMTime time) {
-																 Float64 seconds = CMTimeGetSeconds(time);
-																 self.currentTime = seconds;
-															 }];
-							
-							AVPlayerLayer *layer = [AVPlayerLayer playerLayerWithPlayer:_player];
-							[_view setWantsLayer:YES];
-							[_view setLayer:layer];
-						});
-		 
-	 }];
-	
 	return _asset ? YES : NO;
 }
 
@@ -131,13 +97,13 @@
 }
 - (void)syncUI
 {
-    if((_player.currentItem != nil) &&
-        ([_player.currentItem status] == AVPlayerItemStatusReadyToPlay)) {
-        _playButton.enabled = YES;
-    }
-    else {
-        _playButton.enabled = NO;
-    }
+	if((_player.currentItem != nil) &&
+	   ([_player.currentItem status] == AVPlayerItemStatusReadyToPlay)) {
+		_playButton.enabled = YES;
+	}
+	else {
+		_playButton.enabled = NO;
+	}
 	
 	CGFloat rate = _player.rate;
 	if(_player.rate == 0) {
@@ -163,6 +129,72 @@
 
 #pragma mark -
 #pragma mark KVC & KVO
+- (void)setAsset:(AVURLAsset *)asset
+{
+	if(_asset == asset) return;
+	
+	[_asset autorelease];
+	_asset = [asset retain];
+	
+	[_asset loadValuesAsynchronouslyForKeys:[NSArray arrayWithObject: @"tracks"]
+						  completionHandler:
+	 ^ {
+		 dispatch_async(dispatch_get_main_queue(),
+						^{
+							self.item = [AVPlayerItem playerItemWithAsset:_asset];
+						});
+	 }];
+}
+- (void)setItem:(AVPlayerItem *)item
+{
+	if(_item == item) return;
+	
+	NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
+	if(_item) {
+		[_item removeObserver:self forKeyPath:@"status"];
+		[nc removeObserver:self name:AVPlayerItemDidPlayToEndTimeNotification object:_item];
+	}
+	[_item autorelease];
+	_item = [item retain];
+	
+	[_item addObserver:self
+			forKeyPath:@"status"
+			   options:0
+			   context:_item];
+	[nc addObserver:self
+		   selector:@selector(playerItemDidReachEnd:)
+			   name:AVPlayerItemDidPlayToEndTimeNotification
+			 object:_item];
+	
+	self.player = [AVPlayer playerWithPlayerItem:_item];
+}
+- (void)setPlayer:(AVPlayer *)player
+{
+	if(_player == player) return;
+	
+	if(_player) {
+		[_player removeObserver:self forKeyPath:@"rate"];
+		[_player pause];
+	}
+	[_player autorelease];
+	_player = [player retain];
+	
+	[_player addObserver:self
+			  forKeyPath:@"rate"
+				 options:0
+				 context:_player];
+	
+	[_player addPeriodicTimeObserverForInterval:CMTimeMake(4, 100)
+										  queue:dispatch_get_main_queue()
+									 usingBlock: ^(CMTime time) {
+										 Float64 seconds = CMTimeGetSeconds(time);
+										 self.currentTime = seconds;
+									 }];
+	
+	AVPlayerLayer *layer = [AVPlayerLayer playerLayerWithPlayer:_player];
+	[_view setWantsLayer:YES];
+	[_view setLayer:layer];
+}
 - (void)setCaption:(NSString *)caption
 {
 	if(![_view layer]) return;
@@ -199,18 +231,18 @@
 {
 	if(context == _item) {
 		dispatch_async(dispatch_get_main_queue(),
-                       ^{
+					   ^{
 						   [self sizeTofitWidnow];
-                           [self syncUI];
-                       });
-        return;
+						   [self syncUI];
+					   });
+		return;
 	}
 	if(context == _player) {
 		dispatch_async(dispatch_get_main_queue(),
-                       ^{
-                           [self syncUI];
-                       });
-        return;
+					   ^{
+						   [self syncUI];
+					   });
+		return;
 	}
 	[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
 }