added error reporting callback to ASVideoNode

CHANGELOG.md

@@ -18,3 +18,4 @@
 - [ASDisplayNode] Pass drawParameter in rendering context callbacks [Michael Schneider](https://github.com/maicki)[#248](https://github.com/TextureGroup/Texture/pull/248)
 - [ASTextNode] Move to class method of drawRect:withParameters:isCancelled:isRasterizing: for drawing [Michael Schneider] (https://github.com/maicki)[#232](https://github.com/TextureGroup/Texture/pull/232)
 - [ASDisplayNode] Remove instance:-drawRect:withParameters:isCancelled:isRasterizing: (https://github.com/maicki)[#232](https://github.com/TextureGroup/Texture/pull/232)
+- [ASVideoNode] Added error reporing to ASVideoNode and it's delegate [#260](https://github.com/TextureGroup/Texture/pull/260)

Source/ASVideoNode.h

@@ -110,7 +110,7 @@ NS_ASSUME_NONNULL_BEGIN
  * @param videoNode The video node.
  * @param state player state that is going to be set.
  * @discussion Delegate method invoked when player changes it's state to
- * ASVideoNodePlayerStatePlaying or ASVideoNodePlayerStatePaused 
+ * ASVideoNodePlayerStatePlaying or ASVideoNodePlayerStatePaused
  * and asks delegate if state change is valid
  */
 - (BOOL)videoNode:(ASVideoNode*)videoNode shouldChangePlayerStateTo:(ASVideoNodePlayerState)state;
@@ -147,6 +147,14 @@ NS_ASSUME_NONNULL_BEGIN
  * @param videoNode The videoNode
  */
 - (void)videoNodeDidRecoverFromStall:(ASVideoNode *)videoNode;
+/**
+ * @abstract Delegate method invoked when an error occurs while trying trying to load an asset
+ * @param videoNode The videoNode.
+ * @param key The key of value that failed to load.
+ * @param asset The asset.
+ * @param error The error that occurs.
+ */
+- (void)videoNode:(ASVideoNode *)videoNode didFailToLoadValueForKey:(NSString *)key asset:(AVAsset *)asset error:(NSError *)error;
 
 @end
 

Source/ASVideoNode.mm

@@ -153,6 +153,7 @@ - (void)prepareToPlayAsset:(AVAsset *)asset withKeys:(NSArray<NSString *> *)requ
     AVKeyValueStatus keyStatus = [asset statusOfValueForKey:key error:&error];
     if (keyStatus == AVKeyValueStatusFailed) {
       NSLog(@"Asset loading failed with error: %@", error);
+      [self.delegate videoNode:self didFailToLoadValueForKey:key asset:asset error:error];
     }
   }