Cocos2dxで動画の上にスプライトを描画する（iOS）

// AppController.h
...
// インポートを追加
#import <AVFoundation/AVPlayer.h>
#import <AVFoundation/AVPlayerItem.h>
#import <AVFoundation/AVPlayerLayer.h>

...
@interface AppController : NSObject  {
    UIWindow *window;

  // 動画再生用のメンバ変数を追加
  UIView* mainUiview;
  AVPlayer* player;
  AVPlayerItem* playerItem;
  AVPlayerLayer* playerLayer;
}

@property(nonatomic, readonly) RootViewController* viewController;

// 動画再生用のメソッドを追加
- (void) playVideo:(NSString *)path;
- (void) stopVideo;
- (void) pauseVideo: (BOOL)pause;
- (void) seekVideo: (float) position;
- (void) getVideoInfo: (float*)now duration:(float*)duration;

@end

// AppController.mm
#import <AVFoundation/AVAsset.h>

+static AppController* theController;

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+  // iOSWrapperからAppControllerが呼び出せるように、グローバル変数に格納しておく
+  theController = self;

  ...

    // Init the CCEAGLView
+  CGRect rect = [window bounds];
+  {
+    // 横長になるように強制的に書き換える
+    float w = rect.size.width, h = rect.size.height;
+    if (w < h) {
+      rect.size.width = h; rect.size.height = w;
+    }
+  }
-  CCEAGLView *eaglView = [CCEAGLView viewWithFrame: [window bounds]
+  CCEAGLView *eaglView = [CCEAGLView viewWithFrame: rect
                                        pixelFormat: kEAGLColorFormatRGBA8
                                        depthFormat: GL_DEPTH24_STENCIL8_OES
                                 preserveBackbuffer: NO
                                         sharegroup: nil
                                      multiSampling: NO
                                    numberOfSamples: 0];
+  eaglView.opaque = NO;
  
+  // 動画をCocosよりも下に表示するために、
+  // eaglViewをrootViewController.viewに直接代入するのではなく、UIViewを挟む。
+  UIView* uiview = [[UIView alloc] initWithFrame: [window bounds]];
+  [uiview addSubview:eaglView];
+  mainUiview = uiview;

   // Use RootViewController manage CCEAGLView
   _viewController = [[RootViewController alloc] initWithNibName:nil bundle:nil];
   _viewController.wantsFullScreenLayout = YES;
-  _viewController.view = eaglView;
+  _viewController.view = uiview;

// AppController.mm
- (void) stopVideo {
  [self killMoviePlayer];
}

- (void) pauseVideo: (BOOL)pause {
  if (pause)
    [player pause];
  else
    [player play];
}

- (void) playVideo:(NSString *)path {
  NSURL* url = [NSURL fileURLWithPath:path];
  playerItem = [[AVPlayerItem alloc] initWithURL:url];
  
  player = [[AVPlayer alloc] initWithPlayerItem:playerItem];

  CALayer* parentLayer = self->mainUiview.layer;
  playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];
  playerLayer.frame = parentLayer.bounds;  // frame は Orientation を反映してない、bounds はしている
  [parentLayer insertSublayer:playerLayer atIndex:0];
  [playerLayer addObserver:self
                forKeyPath:@"readyForDisplay"
                   options:NSKeyValueObservingOptionNew
                   context:NULL];
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
  if ([keyPath isEqualToString:@"readyForDisplay"]) {
    [playerLayer removeObserver:self
                     forKeyPath:@"readyForDisplay"
                        context:NULL];

    [player play];
  }
}

-(void)killMoviePlayer {
  if (player == nil)
    return;
  
  [player pause];
  [[NSNotificationCenter defaultCenter] removeObserver:self
                                                  name:AVPlayerItemDidPlayToEndTimeNotification
                                                object:playerItem];

  [playerLayer removeFromSuperlayer];
  
  player = nil;
  playerItem = nil;
  playerLayer = nil;
}

- (void) seekVideo: (float) position {
  if (player == nil)
    return;
  
  CMTime time = playerItem.asset.duration;
  time.value *= position;
  [player seekToTime: time];
}

- (void) getVideoInfo: (float*)now duration:(float*)duration {
  if (player == nil) {
    *now = *duration = 0;
    return;
  }
  
  *now = CMTimeGetSeconds(player.currentTime);
  *duration = CMTimeGetSeconds(playerItem.asset.duration);
}