Disable fetching video and text tracks in background player

This reduces data usage for manifest sources with demuxed audio and
video, such as livestreams, for non-HLS sources only due to an
ExoPlayer bug.

app/src/main/java/org/schabi/newpipe/player/Player.java

@@ -114,6 +114,7 @@ import org.schabi.newpipe.player.playqueue.SinglePlayQueue;
 import org.schabi.newpipe.player.resolver.AudioPlaybackResolver;
 import org.schabi.newpipe.player.resolver.VideoPlaybackResolver;
 import org.schabi.newpipe.player.resolver.VideoPlaybackResolver.SourceType;
+import org.schabi.newpipe.player.ui.BackgroundPlayerUi;
 import org.schabi.newpipe.player.ui.MainPlayerUi;
 import org.schabi.newpipe.player.ui.PlayerUi;
 import org.schabi.newpipe.player.ui.PlayerUiList;
@@ -271,6 +272,7 @@ public final class Player implements PlaybackListener, Listener {
     @NonNull
     private final HistoryRecordManager recordManager;
 
+    private boolean screenOn = true;
 
     /*//////////////////////////////////////////////////////////////////////////
     // Constructor
@@ -592,14 +594,17 @@ public final class Player implements PlaybackListener, Listener {
         switch (playerType) {
             case MAIN:
                 UIs.destroyAll(PopupPlayerUi.class);
+                UIs.destroyAll(BackgroundPlayerUi.class);
                 UIs.addAndPrepare(new MainPlayerUi(this, binding));
                 break;
             case POPUP:
                 UIs.destroyAll(MainPlayerUi.class);
+                UIs.destroyAll(BackgroundPlayerUi.class);
                 UIs.addAndPrepare(new PopupPlayerUi(this, binding));
                 break;
             case AUDIO:
                 UIs.destroyAll(VideoPlayerUi.class);
+                UIs.addAndPrepare(new BackgroundPlayerUi(this));
                 break;
         }
     }
@@ -842,6 +847,12 @@ public final class Player implements PlaybackListener, Listener {
             case ACTION_SHUFFLE:
                 toggleShuffleModeEnabled();
                 break;
+            case Intent.ACTION_SCREEN_OFF:
+                screenOn = false;
+                break;
+            case Intent.ACTION_SCREEN_ON:
+                screenOn = true;
+                break;
             case Intent.ACTION_CONFIGURATION_CHANGED:
                 if (DEBUG) {
                     Log.d(TAG, "ACTION_CONFIGURATION_CHANGED received");
@@ -2462,4 +2473,11 @@ public final class Player implements PlaybackListener, Listener {
                 .orElse(RENDERER_UNAVAILABLE);
     }
     //endregion
+
+    /**
+     * @return whether the device screen is turned on.
+     */
+    public boolean isScreenOn() {
+        return screenOn;
+    }
 }

app/src/main/java/org/schabi/newpipe/player/ui/BackgroundPlayerUi.java

@@ -0,0 +1,29 @@
+package org.schabi.newpipe.player.ui;
+
+import androidx.annotation.NonNull;
+
+import org.schabi.newpipe.player.Player;
+
+/**
+ * This is not a real UI for the background player, it used to disable fetching video and text
+ * tracks with it.
+ *
+ * <p>
+ * This allows reducing data usage for manifest sources with demuxed audio and video,
+ * such as livestreams.
+ * </p>
+ */
+public class BackgroundPlayerUi extends PlayerUi {
+
+    public BackgroundPlayerUi(@NonNull final Player player) {
+        super(player);
+    }
+
+    @Override
+    public void initPlayback() {
+        super.initPlayback();
+
+        // Make sure to disable video and subtitles track types
+        player.useVideoAndSubtitles(false);
+    }
+}

app/src/main/java/org/schabi/newpipe/player/ui/MainPlayerUi.java

@@ -216,6 +216,10 @@ public final class MainPlayerUi extends VideoPlayerUi implements View.OnLayoutCh
         playQueueAdapter = new PlayQueueAdapter(context,
                 Objects.requireNonNull(player.getPlayQueue()));
         segmentAdapter = new StreamSegmentAdapter(getStreamSegmentListener());
+
+        // Make sure video and text tracks are enabled if the user is in the app, in the case user
+        // switched from background player to main player
+        player.useVideoAndSubtitles(fragmentIsVisible);
     }
 
     @Override

app/src/main/java/org/schabi/newpipe/player/ui/PopupPlayerUi.java

@@ -152,6 +152,14 @@ public final class PopupPlayerUi extends VideoPlayerUi {
         windowManager.addView(closeOverlayBinding.getRoot(), closeOverlayLayoutParams);
     }
 
+    @Override
+    public void initPlayback() {
+        super.initPlayback();
+        // Make sure video and text tracks are enabled if the screen is turned on (which should
+        // always be the case), in the case user switched from background player to popup player
+        player.useVideoAndSubtitles(player.isScreenOn());
+    }
+
     @Override
     protected void setupElementsVisibility() {
         binding.fullScreenButton.setVisibility(View.VISIBLE);