9432 : Added support for filtering forced text tracks

1. Added filtering for forced text tracks.
2. Support for disabling all other tracks other than forced track when None is selected.

library/common/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelectionParameters.java

@@ -97,6 +97,7 @@ public static class Builder {
     private ImmutableList<String> preferredTextLanguages;
     private @C.RoleFlags int preferredTextRoleFlags;
     private boolean selectUndeterminedTextLanguage;
+    private @C.SelectionFlags int disabledTextTrackSelectionFlags;
     // General
     private boolean forceLowestBitrate;
     private boolean forceHighestSupportedBitrate;
@@ -129,6 +130,7 @@ public Builder() {
       preferredTextLanguages = ImmutableList.of();
       preferredTextRoleFlags = 0;
       selectUndeterminedTextLanguage = false;
+      disabledTextTrackSelectionFlags= 0;
       // General
       forceLowestBitrate = false;
       forceHighestSupportedBitrate = false;
@@ -146,11 +148,13 @@ public Builder(Context context) {
       this();
       setPreferredTextLanguageAndRoleFlagsToCaptioningManagerSettings(context);
       setViewportSizeToPhysicalDisplaySize(context, /* viewportOrientationMayChange= */ true);
+      disabledTextTrackSelectionFlags = 0;
     }
 
     /** Creates a builder with the initial values specified in {@code initialValues}. */
     protected Builder(TrackSelectionParameters initialValues) {
       init(initialValues);
+      disabledTextTrackSelectionFlags = 0;
     }
 
     /** Creates a builder with the initial values specified in {@code bundle}. */
@@ -230,6 +234,10 @@ protected Builder(Bundle bundle) {
           bundle.getBoolean(
               keyForField(FIELD_SELECT_UNDETERMINED_TEXT_LANGUAGE),
               DEFAULT_WITHOUT_CONTEXT.selectUndeterminedTextLanguage);
+      setDisabledTextTrackSelectionFlags(
+          bundle.getInt(
+              keyForField(FIELD_DISABLED_TEXT_TRACK_SELECTION_FLAGS),
+              DEFAULT_WITHOUT_CONTEXT.disabledTextTrackSelectionFlags));
       // General
       forceLowestBitrate =
           bundle.getBoolean(
@@ -253,6 +261,7 @@ protected Builder(Bundle bundle) {
               Ints.asList(
                   firstNonNull(
                       bundle.getIntArray(keyForField(FIELD_DISABLED_TRACK_TYPE)), new int[0])));
+      disabledTextTrackSelectionFlags = 0;
     }
 
     /** Overrides the value of the builder with the value of {@link TrackSelectionParameters}. */
@@ -735,6 +744,12 @@ private static ImmutableList<String> normalizeLanguageCodes(String[] preferredTe
       }
       return listBuilder.build();
     }
+
+    public Builder setDisabledTextTrackSelectionFlags(
+        @C.SelectionFlags int disabledTextTrackSelectionFlags) {
+      this.disabledTextTrackSelectionFlags = disabledTextTrackSelectionFlags;
+      return this;
+    }
   }
 
   /**
@@ -902,6 +917,12 @@ public static TrackSelectionParameters getDefaults(Context context) {
    */
   public final ImmutableSet<@C.TrackType Integer> disabledTrackTypes;
 
+  /**
+   * The track selectionFlags bitmaps that are disabled. No track of a disabled type will be selected, thus no track
+   * selectionFlag contained in the bitmap will be played. The default value is that no selectionFlag is disabled(0)
+   */
+  public final @C.SelectionFlags int disabledTextTrackSelectionFlags;
+
   protected TrackSelectionParameters(Builder builder) {
     // Video
     this.maxVideoWidth = builder.maxVideoWidth;
@@ -932,6 +953,7 @@ protected TrackSelectionParameters(Builder builder) {
     this.forceHighestSupportedBitrate = builder.forceHighestSupportedBitrate;
     this.overrides = ImmutableMap.copyOf(builder.overrides);
     this.disabledTrackTypes = builder.disabledTrackTypes;
+    this.disabledTextTrackSelectionFlags = 0;
   }
 
   /** Creates a new {@link Builder}, copying the initial values from this instance. */
@@ -1043,7 +1065,8 @@ public int hashCode() {
     FIELD_FORCE_HIGHEST_SUPPORTED_BITRATE,
     FIELD_SELECTION_OVERRIDES,
     FIELD_DISABLED_TRACK_TYPE,
-    FIELD_PREFERRED_VIDEO_ROLE_FLAGS
+    FIELD_PREFERRED_VIDEO_ROLE_FLAGS,
+    FIELD_DISABLED_TEXT_TRACK_SELECTION_FLAGS
   })
   private @interface FieldNumber {}
 
@@ -1072,6 +1095,7 @@ public int hashCode() {
   private static final int FIELD_SELECTION_OVERRIDES = 23;
   private static final int FIELD_DISABLED_TRACK_TYPE = 24;
   private static final int FIELD_PREFERRED_VIDEO_ROLE_FLAGS = 25;
+  private static final int FIELD_DISABLED_TEXT_TRACK_SELECTION_FLAGS = 26;
 
   @Override
   public Bundle toBundle() {

library/ui/src/main/java/com/google/android/exoplayer2/ui/StyledPlayerControlView.java

@@ -59,6 +59,7 @@
 import androidx.recyclerview.widget.RecyclerView;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.ExoPlayerLibraryInfo;
+import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.ForwardingPlayer;
 import com.google.android.exoplayer2.Player;
 import com.google.android.exoplayer2.Player.Events;
@@ -67,6 +68,7 @@
 import com.google.android.exoplayer2.TracksInfo;
 import com.google.android.exoplayer2.TracksInfo.TrackGroupInfo;
 import com.google.android.exoplayer2.source.TrackGroup;
+import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
 import com.google.android.exoplayer2.trackselection.TrackSelectionOverride;
 import com.google.android.exoplayer2.trackselection.TrackSelectionParameters;
 import com.google.android.exoplayer2.util.Assertions;
@@ -1133,8 +1135,14 @@ private ImmutableList<TrackInformation> gatherSupportedTrackInfosOfType(
         if (!trackGroupInfo.isTrackSupported(trackIndex)) {
           continue;
         }
-        String trackName =
-            trackNameProvider.getTrackName(trackGroupInfo.getTrackFormat(trackIndex));
+
+        Format trackFormat = trackGroupInfo.getTrackFormat(trackIndex);
+
+        if(trackFormat.selectionFlags == C.SELECTION_FLAG_FORCED) {
+          continue;
+        }
+
+        String trackName = trackNameProvider.getTrackName(trackFormat);
         tracks.add(new TrackInformation(tracksInfo, trackGroupIndex, trackIndex, trackName));
       }
     }
@@ -1873,17 +1881,18 @@ public void onBindViewHolderAtZeroPosition(SubSettingViewHolder holder) {
               player.setTrackSelectionParameters(
                   trackSelectionParameters
                       .buildUpon()
-                      .setDisabledTrackTypes(
-                          new ImmutableSet.Builder<@C.TrackType Integer>()
-                              .addAll(trackSelectionParameters.disabledTrackTypes)
-                              .add(C.TRACK_TYPE_TEXT)
-                              .build())
+                      .setDisabledTextTrackSelectionFlags(~C.SELECTION_FLAG_FORCED)
                       .build());
               settingsWindow.dismiss();
             }
           });
     }
 
+    /*
+    trackSelectionParameters.buildUpon().
+                      setDisabledTextTrackSelectionFlags(0)).build()
+     */
+
     @Override
     public void onBindViewHolder(SubSettingViewHolder holder, int position) {
       super.onBindViewHolder(holder, position);