Merge pull request #1131 from react-native-community/feature/ios-becoming-noisy

Document onAudioBecomingNoisy & add iOS support

Author: cobarx

README.md

@@ -239,6 +239,7 @@ var styles = StyleSheet.create({
 * [volume](#volume)
 
 ### Event props
+* [onAudioBecomingNoisy](#onaudiobecomingnoisy)
 * [onLoad](#onload)
 * [onLoadStart](#onloadstart)
 * [onProgress](#onprogress)
@@ -452,6 +453,13 @@ Platforms: all
 
 ### Event props
 
+#### onAudioBecomingNoisy
+Callback function that is called when the audio is about to become 'noisy' due to a change in audio outputs. Typically this is called when audio output is being switched from an external source like headphones back to the internal speaker. It's a good idea to pause the media when this happens so the speaker doesn't start blasting sound.
+
+Payload: none
+
+Platforms: Android ExoPlayer, iOS
+
 #### onLoad
 Callback function that is called when the media is loaded and ready to play.
 

Video.js

@@ -235,6 +235,7 @@ export default class Video extends Component {
       onVideoEnd: this._onEnd,
       onVideoBuffer: this._onBuffer,
       onTimedMetadata: this._onTimedMetadata,
+      onVideoAudioBecomingNoisy: this._onAudioBecomingNoisy,
       onVideoFullscreenPlayerWillPresent: this._onFullscreenPlayerWillPresent,
       onVideoFullscreenPlayerDidPresent: this._onFullscreenPlayerDidPresent,
       onVideoFullscreenPlayerWillDismiss: this._onFullscreenPlayerWillDismiss,
@@ -296,6 +297,7 @@ Video.propTypes = {
   onVideoSeek: PropTypes.func,
   onVideoEnd: PropTypes.func,
   onTimedMetadata: PropTypes.func,
+  onVideoAudioBecomingNoisy: PropTypes.func,
   onVideoFullscreenPlayerWillPresent: PropTypes.func,
   onVideoFullscreenPlayerDidPresent: PropTypes.func,
   onVideoFullscreenPlayerWillDismiss: PropTypes.func,

android-exoplayer/src/main/java/com/brentvatne/exoplayer/VideoEventEmitter.java

@@ -42,7 +42,7 @@ class VideoEventEmitter {
     private static final String EVENT_BUFFER = "onVideoBuffer";
     private static final String EVENT_IDLE = "onVideoIdle";
     private static final String EVENT_TIMED_METADATA = "onTimedMetadata";
-    private static final String EVENT_AUDIO_BECOMING_NOISY = "onAudioBecomingNoisy";
+    private static final String EVENT_AUDIO_BECOMING_NOISY = "onVideoAudioBecomingNoisy";
     private static final String EVENT_AUDIO_FOCUS_CHANGE = "onAudioFocusChanged";
     private static final String EVENT_PLAYBACK_RATE_CHANGE = "onPlaybackRateChange";
 

ios/RCTVideo.h

@@ -17,6 +17,7 @@
 @property (nonatomic, copy) RCTBubblingEventBlock onVideoSeek;
 @property (nonatomic, copy) RCTBubblingEventBlock onVideoEnd;
 @property (nonatomic, copy) RCTBubblingEventBlock onTimedMetadata;
+@property (nonatomic, copy) RCTBubblingEventBlock onVideoAudioBecomingNoisy;
 @property (nonatomic, copy) RCTBubblingEventBlock onVideoFullscreenPlayerWillPresent;
 @property (nonatomic, copy) RCTBubblingEventBlock onVideoFullscreenPlayerDidPresent;
 @property (nonatomic, copy) RCTBubblingEventBlock onVideoFullscreenPlayerWillDismiss;

ios/RCTVideo.m

@@ -91,6 +91,11 @@ - (instancetype)initWithEventDispatcher:(RCTEventDispatcher *)eventDispatcher
                                              selector:@selector(applicationWillEnterForeground:)
                                                  name:UIApplicationWillEnterForegroundNotification
                                                object:nil];
+
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(audioRouteChanged:)
+                                                 name:AVAudioSessionRouteChangeNotification
+                                               object:nil];
   }
 
   return self;
@@ -190,6 +195,17 @@ - (void)applicationWillEnterForeground:(NSNotification *)notification
   }
 }
 
+#pragma mark - Audio events
+
+- (void)audioRouteChanged:(NSNotification *)notification
+{
+    NSNumber *reason = [[notification userInfo] objectForKey:AVAudioSessionRouteChangeReasonKey];
+    NSNumber *previousRoute = [[notification userInfo] objectForKey:AVAudioSessionRouteChangePreviousRouteKey];
+    if (reason.unsignedIntValue == AVAudioSessionRouteChangeReasonOldDeviceUnavailable) {
+        self.onVideoAudioBecomingNoisy(@{@"target": self.reactTag});
+    }
+}
+
 #pragma mark - Progress
 
 - (void)sendProgressUpdate

ios/RCTVideoManager.m

@@ -46,6 +46,7 @@ - (dispatch_queue_t)methodQueue
 RCT_EXPORT_VIEW_PROPERTY(onVideoSeek, RCTBubblingEventBlock);
 RCT_EXPORT_VIEW_PROPERTY(onVideoEnd, RCTBubblingEventBlock);
 RCT_EXPORT_VIEW_PROPERTY(onTimedMetadata, RCTBubblingEventBlock);
+RCT_EXPORT_VIEW_PROPERTY(onVideoAudioBecomingNoisy, RCTBubblingEventBlock);
 RCT_EXPORT_VIEW_PROPERTY(onVideoFullscreenPlayerWillPresent, RCTBubblingEventBlock);
 RCT_EXPORT_VIEW_PROPERTY(onVideoFullscreenPlayerDidPresent, RCTBubblingEventBlock);
 RCT_EXPORT_VIEW_PROPERTY(onVideoFullscreenPlayerWillDismiss, RCTBubblingEventBlock);