Support selecting audio tracks

Implements audio track selection on iOS & Android ExoPlayer. The prop mirrors the API for selectedTextTrack.

README.md

@@ -232,6 +232,7 @@ var styles = StyleSheet.create({
 * [rate](#rate)
 * [repeat](#repeat)
 * [resizeMode](#resizemode)
+* [selectedAudioTrack](#selectedaudiotrack)
 * [selectedTextTrack](#selectedtexttrack)
 * [stereoPan](#stereopan)
 * [textTracks](#texttracks)
@@ -356,6 +357,36 @@ Determines how to resize the video when the frame doesn't match the raw video di
 
 Platforms: Android ExoPlayer, Android MediaPlayer, iOS, Windows UWP
 
+#### selectedAudioTrack
+Configure which audio track, if any, is played.
+
+```
+selectedAudioTrack={{
+  type: Type,
+  value: Value
+}}
+```
+
+Example:
+```
+selectedAudioTrack={{
+  type: "title",
+  value: "Dubbing"
+}}
+```
+
+Type | Value | Description
+--- | --- | ---
+"system" (default) | N/A | Play the audio track that matches the system language. If none match, play the first track.
+"disabled" | N/A | Turn off audio
+"title" | string | Play the audio track with the title specified as the Value, e.g. "French"
+"language" | string | Play the audio track with the language specified as the Value, e.g. "fr"
+"index" | number | Play the audio track with the index specified as the value, e.g. 0
+
+If a track matching the specified Type (and Value if appropriate) is unavailable, the first audio track will be played. If multiple tracks match the criteria, the first match will be used.
+
+Platforms: Android ExoPlayer, iOS
+
 #### selectedTextTrack
 Configure which text track (caption or subtitle), if any, is shown.
 
@@ -470,7 +501,8 @@ Property | Type | Description
 currentPosition | number | Time in seconds where the media will start
 duration | number | Length of the media in seconds
 naturalSize | object | Properties:<br> * width - Width in pixels that the video was encoded at<br> * height - Height in pixels that the video was encoded at<br> * orientation - "portrait" or "landscape"
-textTracks | array | An array of text track info objects with the following properties:<br> * index - Index number<br> * title - Description of the track<br> * language - 2 letter [ISO 639-1](https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes) language code<br> * type - Mime type of track
+audioTracks | array | An array of audio track info objects with the following properties:<br> * index - Index number<br> * title - Description of the track<br> * language - 2 letter [ISO 639-1](https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes) or 3 letter [ISO639-2](https://en.wikipedia.org/wiki/List_of_ISO_639-2_codes) language code<br> * type - Mime type of track
+textTracks | array | An array of text track info objects with the following properties:<br> * index - Index number<br> * title - Description of the track<br> * language - 2 letter [ISO 639-1](https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes) or 3 letter [ISO 639-2](https://en.wikipedia.org/wiki/List_of_ISO_639-2_codes) language code<br> * type - Mime type of track
 
 Example:
 ```
@@ -488,6 +520,10 @@ Example:
      orientation: 'landscape'
      width: '1920'
   },
+  audioTracks: [
+    { language: 'es', title: 'Spanish', type: 'audio/mpeg', index: 0 },
+    { language: 'en', title: 'English', type: 'audio/mpeg', index: 1 } ],
+  ],
   textTracks: [
     { title: '#1 French', language: 'fr', index: 0, type: 'text/vtt' },
     { title: '#2 English CC', language: 'en', index: 1, type: 'text/vtt' },

Video.js

@@ -316,6 +316,13 @@ Video.propTypes = {
   posterResizeMode: Image.propTypes.resizeMode,
   repeat: PropTypes.bool,
   allowsExternalPlayback: PropTypes.bool,
+  selectedAudioTrack: PropTypes.shape({
+    type: PropTypes.string.isRequired,
+    value: PropTypes.oneOfType([
+      PropTypes.string,
+      PropTypes.number
+    ])
+  }),
   selectedTextTrack: PropTypes.shape({
     type: PropTypes.string.isRequired,
     value: PropTypes.oneOfType([

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

@@ -113,6 +113,9 @@ class ReactExoplayerView extends FrameLayout implements
     private Uri srcUri;
     private String extension;
     private boolean repeat;
+    private String audioTrackType;
+    private Dynamic audioTrackValue;
+    private ReadableArray audioTracks;
     private String textTrackType;
     private Dynamic textTrackValue;
     private ReadableArray textTracks;
@@ -501,20 +504,43 @@ class ReactExoplayerView extends FrameLayout implements
     private void videoLoaded() {
         if (loadVideoStarted) {
             loadVideoStarted = false;
+            setSelectedAudioTrack(audioTrackType, audioTrackValue);
             setSelectedTextTrack(textTrackType, textTrackValue);
             Format videoFormat = player.getVideoFormat();
             int width = videoFormat != null ? videoFormat.width : 0;
             int height = videoFormat != null ? videoFormat.height : 0;
             eventEmitter.load(player.getDuration(), player.getCurrentPosition(), width, height,
-                    getTextTrackInfo());
+                    getAudioTrackInfo(), getTextTrackInfo());
         }
     }
 
+    private WritableArray getAudioTrackInfo() {
+        WritableArray audioTracks = Arguments.createArray();
+
+        MappingTrackSelector.MappedTrackInfo info = trackSelector.getCurrentMappedTrackInfo();
+        int index = getTrackRendererIndex(C.TRACK_TYPE_AUDIO);
+        if (info == null || index == C.INDEX_UNSET) {
+            return audioTracks;
+        }
+
+        TrackGroupArray groups = info.getTrackGroups(index);
+        for (int i = 0; i < groups.length; ++i) {
+            Format format = groups.get(i).getFormat(0);
+            WritableMap textTrack = Arguments.createMap();
+            textTrack.putInt("index", i);
+            textTrack.putString("title", format.id != null ? format.id : "");
+            textTrack.putString("type", format.sampleMimeType);
+            textTrack.putString("language", format.language != null ? format.language : "");
+            audioTracks.pushMap(textTrack);
+        }
+        return audioTracks;
+    }
+
     private WritableArray getTextTrackInfo() {
         WritableArray textTracks = Arguments.createArray();
 
         MappingTrackSelector.MappedTrackInfo info = trackSelector.getCurrentMappedTrackInfo();
-        int index = getTextTrackRendererIndex();
+        int index = getTrackRendererIndex(C.TRACK_TYPE_TEXT);
         if (info == null || index == C.INDEX_UNSET) {
             return textTracks;
         }
@@ -647,10 +673,10 @@ class ReactExoplayerView extends FrameLayout implements
         return false;
     }
 
-    public int getTextTrackRendererIndex() {
+    public int getTrackRendererIndex(int trackType) {
         int rendererCount = player.getRendererCount();
         for (int rendererIndex = 0; rendererIndex < rendererCount; rendererIndex++) {
-            if (player.getRendererType(rendererIndex) == C.TRACK_TYPE_TEXT) {
+            if (player.getRendererType(rendererIndex) == trackType) {
                 return rendererIndex;
             }
         }
@@ -724,12 +750,9 @@ class ReactExoplayerView extends FrameLayout implements
         this.repeat = repeat;
     }
 
-    public void setSelectedTextTrack(String type, Dynamic value) {
+    public void setSelectedTrack(int trackType, String type, Dynamic value) {
-        textTrackType = type;
+        int rendererIndex = getTrackRendererIndex(trackType);
-        textTrackValue = value;
+        if (rendererIndex == C.INDEX_UNSET) {
-
-        int index = getTextTrackRendererIndex();
-        if (index == C.INDEX_UNSET) {
             return;
         }
         MappingTrackSelector.MappedTrackInfo info = trackSelector.getCurrentMappedTrackInfo();
@@ -737,13 +760,15 @@ class ReactExoplayerView extends FrameLayout implements
             return;
         }
 
-        TrackGroupArray groups = info.getTrackGroups(index);
+        TrackGroupArray groups = info.getTrackGroups(rendererIndex);
         int trackIndex = C.INDEX_UNSET;
-        trackSelector.setSelectionOverride(index, groups, null);
 
         if (TextUtils.isEmpty(type)) {
-            // Do nothing
+            type = "default";
-        } else if (type.equals("disabled")) {
+        }
+
+        if (type.equals("disabled")) {
+            trackSelector.setSelectionOverride(rendererIndex, groups, null);
             return;
         } else if (type.equals("language")) {
             for (int i = 0; i < groups.length; ++i) {
@@ -762,26 +787,25 @@ class ReactExoplayerView extends FrameLayout implements
                 }
             }
         } else if (type.equals("index")) {
+            if (value.asInt() < groups.length) {
                 trackIndex = value.asInt();
-        } else { // default. Use system settings if possible
+            }
+        } else { // default
+            if (rendererIndex == C.TRACK_TYPE_TEXT) { // Use system settings if possible
                 int sdk = android.os.Build.VERSION.SDK_INT;
-            if (sdk>18 && groups.length>0) {
+                if (sdk > 18 && groups.length > 0) {
-                CaptioningManager captioningManager = (CaptioningManager) themedReactContext.getSystemService(Context.CAPTIONING_SERVICE);
+                    CaptioningManager captioningManager
-                if (captioningManager.isEnabled()) {
+                            = (CaptioningManager)themedReactContext.getSystemService(Context.CAPTIONING_SERVICE);
-                    // default is to take the first object
+                    if (captioningManager != null && captioningManager.isEnabled()) {
-                    trackIndex = 0;
+                        trackIndex = getTrackIndexForDefaultLocale(groups);
-
-                    String locale = Locale.getDefault().getDisplayLanguage();
-                    for (int i = 0; i < groups.length; ++i) {
-                        Format format = groups.get(i).getFormat(0);
-                        if (format.language != null && format.language.equals(locale)) {
-                            trackIndex = i;
-                            break;
                     }
+                } else {
+                    trackSelector.setSelectionOverride(rendererIndex, groups, null);
+                    return;
                 }
+            } else if (rendererIndex == C.TRACK_TYPE_AUDIO) {
+                trackIndex = getTrackIndexForDefaultLocale(groups);
             }
-            } else return;
-
         }
 
         if (trackIndex == C.INDEX_UNSET) {
@@ -792,7 +816,34 @@ class ReactExoplayerView extends FrameLayout implements
         MappingTrackSelector.SelectionOverride override
                 = new MappingTrackSelector.SelectionOverride(
                 new FixedTrackSelection.Factory(), trackIndex, 0);
-        trackSelector.setSelectionOverride(index, groups, override);
+        trackSelector.setSelectionOverride(rendererIndex, groups, override);
+    }
+
+    private int getTrackIndexForDefaultLocale(TrackGroupArray groups) {
+        int trackIndex = 0; // default if no match
+        String locale2 = Locale.getDefault().getLanguage(); // 2 letter code
+        String locale3 = Locale.getDefault().getISO3Language(); // 3 letter code
+        for (int i = 0; i < groups.length; ++i) {
+            Format format = groups.get(i).getFormat(0);
+            String language = format.language;
+            if (language != null && (language.equals(locale2) || language.equals(locale3))) {
+                trackIndex = i;
+                break;
+            }
+        }
+        return trackIndex;
+    }
+
+    public void setSelectedAudioTrack(String type, Dynamic value) {
+        audioTrackType = type;
+        audioTrackValue = value;
+        setSelectedTrack(C.TRACK_TYPE_AUDIO, audioTrackType, audioTrackValue);
+    }
+
+    public void setSelectedTextTrack(String type, Dynamic value) {
+        textTrackType = type;
+        textTrackValue = value;
+        setSelectedTrack(C.TRACK_TYPE_TEXT, textTrackType, textTrackValue);
     }
 
     public void setPausedModifier(boolean paused) {

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

@@ -28,6 +28,9 @@ public class ReactExoplayerViewManager extends ViewGroupManager<ReactExoplayerVi
     private static final String PROP_SRC_HEADERS = "requestHeaders";
     private static final String PROP_RESIZE_MODE = "resizeMode";
     private static final String PROP_REPEAT = "repeat";
+    private static final String PROP_SELECTED_AUDIO_TRACK = "selectedAudioTrack";
+    private static final String PROP_SELECTED_AUDIO_TRACK_TYPE = "type";
+    private static final String PROP_SELECTED_AUDIO_TRACK_VALUE = "value";
     private static final String PROP_SELECTED_TEXT_TRACK = "selectedTextTrack";
     private static final String PROP_SELECTED_TEXT_TRACK_TYPE = "type";
     private static final String PROP_SELECTED_TEXT_TRACK_VALUE = "value";
@@ -127,6 +130,20 @@ public class ReactExoplayerViewManager extends ViewGroupManager<ReactExoplayerVi
         videoView.setRepeatModifier(repeat);
     }
 
+    @ReactProp(name = PROP_SELECTED_AUDIO_TRACK)
+    public void setSelectedAudioTrack(final ReactExoplayerView videoView,
+                                     @Nullable ReadableMap selectedAudioTrack) {
+        String typeString = null;
+        Dynamic value = null;
+        if (selectedAudioTrack != null) {
+            typeString = selectedAudioTrack.hasKey(PROP_SELECTED_AUDIO_TRACK_TYPE)
+                    ? selectedAudioTrack.getString(PROP_SELECTED_AUDIO_TRACK_TYPE) : null;
+            value = selectedAudioTrack.hasKey(PROP_SELECTED_AUDIO_TRACK_VALUE)
+                    ? selectedAudioTrack.getDynamic(PROP_SELECTED_AUDIO_TRACK_VALUE) : null;
+        }
+        videoView.setSelectedAudioTrack(typeString, value);
+    }
+
     @ReactProp(name = PROP_SELECTED_TEXT_TRACK)
     public void setSelectedTextTrack(final ReactExoplayerView videoView,
                                      @Nullable ReadableMap selectedTextTrack) {

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

@@ -109,6 +109,7 @@ class VideoEventEmitter {
     private static final String EVENT_PROP_WIDTH = "width";
     private static final String EVENT_PROP_HEIGHT = "height";
     private static final String EVENT_PROP_ORIENTATION = "orientation";
+    private static final String EVENT_PROP_AUDIO_TRACKS = "audioTracks";
     private static final String EVENT_PROP_TEXT_TRACKS = "textTracks";
     private static final String EVENT_PROP_HAS_AUDIO_FOCUS = "hasAudioFocus";
     private static final String EVENT_PROP_IS_BUFFERING = "isBuffering";
@@ -130,7 +131,7 @@ class VideoEventEmitter {
     }
 
     void load(double duration, double currentPosition, int videoWidth, int videoHeight,
-              WritableArray textTracks) {
+              WritableArray audioTracks, WritableArray textTracks) {
         WritableMap event = Arguments.createMap();
         event.putDouble(EVENT_PROP_DURATION, duration / 1000D);
         event.putDouble(EVENT_PROP_CURRENT_TIME, currentPosition / 1000D);
@@ -145,6 +146,7 @@ class VideoEventEmitter {
         }
         event.putMap(EVENT_PROP_NATURAL_SIZE, naturalSize);
 
+        event.putArray(EVENT_PROP_AUDIO_TRACKS, audioTracks);
         event.putArray(EVENT_PROP_TEXT_TRACKS, textTracks);
 
         // TODO: Actually check if you can.

ios/RCTVideo.m

@@ -47,6 +47,7 @@ static NSString *const timedMetadata = @"timedMetadata";
   BOOL _allowsExternalPlayback;
   NSArray * _textTracks;
   NSDictionary * _selectedTextTrack;
+  NSDictionary * _selectedAudioTrack;
   BOOL _playbackStalled;
   BOOL _playInBackground;
   BOOL _playWhenInactive;
@@ -498,6 +499,7 @@ static NSString *const timedMetadata = @"timedMetadata";
                                  @"height": height,
                                  @"orientation": orientation
                                  },
+                             @"audioTracks": [self getAudioTrackInfo],
                              @"textTracks": [self getTextTrackInfo],
                              @"target": self.reactTag});
         }
@@ -729,6 +731,7 @@ static NSString *const timedMetadata = @"timedMetadata";
     [_player setMuted:NO];
   }
 
+  [self setSelectedAudioTrack:_selectedAudioTrack];
   [self setSelectedTextTrack:_selectedTextTrack];
   [self setResizeMode:_resizeMode];
   [self setRepeat:_repeat];
@@ -741,12 +744,64 @@ static NSString *const timedMetadata = @"timedMetadata";
   _repeat = repeat;
 }
 
+- (void)setMediaSelectionTrackForCharacteristic:(AVMediaCharacteristic)characteristic
+                                   withCriteria:(NSDictionary *)criteria
+{
+    NSString *type = criteria[@"type"];
+    AVMediaSelectionGroup *group = [_player.currentItem.asset
+                                    mediaSelectionGroupForMediaCharacteristic:characteristic];
+    AVMediaSelectionOption *mediaOption;
+    
+    if ([type isEqualToString:@"disabled"]) {
+        // Do nothing. We want to ensure option is nil
+    } else if ([type isEqualToString:@"language"] || [type isEqualToString:@"title"]) {
+        NSString *value = criteria[@"value"];
+        for (int i = 0; i < group.options.count; ++i) {
+            AVMediaSelectionOption *currentOption = [group.options objectAtIndex:i];
+            NSString *optionValue;
+            if ([type isEqualToString:@"language"]) {
+                optionValue = [currentOption extendedLanguageTag];
+            } else {
+                optionValue = [[[currentOption commonMetadata]
+                                valueForKey:@"value"]
+                               objectAtIndex:0];
+            }
+            if ([value isEqualToString:optionValue]) {
+                mediaOption = currentOption;
+                break;
+            }
+        }
+        //} else if ([type isEqualToString:@"default"]) {
+        //  option = group.defaultOption; */
+    } else if ([type isEqualToString:@"index"]) {
+        if ([criteria[@"value"] isKindOfClass:[NSNumber class]]) {
+            int index = [criteria[@"value"] intValue];
+            if (group.options.count > index) {
+                mediaOption = [group.options objectAtIndex:index];
+            }
+        }
+    } else { // default. invalid type or "system"
+        [_player.currentItem selectMediaOptionAutomaticallyInMediaSelectionGroup:group];
+        return;
+    }
+    
+    // If a match isn't found, option will be nil and text tracks will be disabled
+    [_player.currentItem selectMediaOption:mediaOption inMediaSelectionGroup:group];
+}
+
+- (void)setSelectedAudioTrack:(NSDictionary *)selectedAudioTrack {
+    _selectedAudioTrack = selectedAudioTrack;
+    [self setMediaSelectionTrackForCharacteristic:AVMediaCharacteristicAudible
+                                        withCriteria:_selectedAudioTrack];
+}
+
 - (void)setSelectedTextTrack:(NSDictionary *)selectedTextTrack {
   _selectedTextTrack = selectedTextTrack;
-  if (_textTracks) {
+  if (_textTracks) { // sideloaded text tracks
     [self setSideloadedText];
-  } else {
+  } else { // text tracks included in the HLS playlist
-    [self setStreamingText];
+    [self setMediaSelectionTrackForCharacteristic:AVMediaCharacteristicLegible
+                                     withCriteria:_selectedTextTrack];
   }
 }
 
@@ -869,9 +924,31 @@ static NSString *const timedMetadata = @"timedMetadata";
   if (_selectedTextTrack) [self setSelectedTextTrack:_selectedTextTrack];
 }
 
+- (NSArray *)getAudioTrackInfo
+{
+    NSMutableArray *audioTracks = [[NSMutableArray alloc] init];
+    AVMediaSelectionGroup *group = [_player.currentItem.asset
+                                    mediaSelectionGroupForMediaCharacteristic:AVMediaCharacteristicAudible];
+    for (int i = 0; i < group.options.count; ++i) {
+        AVMediaSelectionOption *currentOption = [group.options objectAtIndex:i];
+        NSString *title = @"";
+        NSArray *values = [[currentOption commonMetadata] valueForKey:@"value"];
+        if (values.count > 0) {
+            title = [values objectAtIndex:0];
+        }
+        NSString *language = [currentOption extendedLanguageTag] ? [currentOption extendedLanguageTag] : @"";
+        NSDictionary *audioTrack = @{
+                                    @"index": [NSNumber numberWithInt:i],
+                                    @"title": title,
+                                    @"language": language
+                                    };
+        [audioTracks addObject:audioTrack];
+    }
+    return audioTracks;
+}
+
 - (NSArray *)getTextTrackInfo
 {
-  
   // if sideloaded, textTracks will already be set
   if (_textTracks) return _textTracks;
   

ios/RCTVideoManager.m

@@ -25,6 +25,7 @@ RCT_EXPORT_VIEW_PROPERTY(repeat, BOOL);
 RCT_EXPORT_VIEW_PROPERTY(allowsExternalPlayback, BOOL);
 RCT_EXPORT_VIEW_PROPERTY(textTracks, NSArray);
 RCT_EXPORT_VIEW_PROPERTY(selectedTextTrack, NSDictionary);
+RCT_EXPORT_VIEW_PROPERTY(selectedAudioTrack, NSDictionary);
 RCT_EXPORT_VIEW_PROPERTY(paused, BOOL);
 RCT_EXPORT_VIEW_PROPERTY(muted, BOOL);
 RCT_EXPORT_VIEW_PROPERTY(controls, BOOL);