Changes according to the code review

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

@@ -205,6 +205,7 @@ public class DefaultTimeBar extends View implements TimeBar {
   private final CopyOnWriteArraySet<OnScrubListener> listeners;
   private final int[] locationOnScreen;
   private final Point touchPosition;
+  private final float density;
 
   private int keyCountIncrement;
   private long keyTimeIncrement;
@@ -219,8 +220,6 @@ public class DefaultTimeBar extends View implements TimeBar {
   private @Nullable long[] adGroupTimesMs;
   private @Nullable boolean[] playedAdGroups;
 
-  private int densityDpi;
-
   /** Creates a new time bar. */
   // Suppress warnings due to usage of View methods in the constructor.
   @SuppressWarnings("nullness:method.invocation.invalid")
@@ -244,7 +243,7 @@ public class DefaultTimeBar extends View implements TimeBar {
     // Calculate the dimensions and paints for drawn elements.
     Resources res = context.getResources();
     DisplayMetrics displayMetrics = res.getDisplayMetrics();
-    densityDpi = displayMetrics.densityDpi;
+    density = displayMetrics.density;
     fineScrubYThreshold = dpToPx(displayMetrics, FINE_SCRUB_Y_THRESHOLD_DP);
     int defaultBarHeight = dpToPx(displayMetrics, DEFAULT_BAR_HEIGHT_DP);
     int defaultTouchTargetHeight = dpToPx(displayMetrics, DEFAULT_TOUCH_TARGET_HEIGHT_DP);
@@ -451,8 +450,8 @@ public class DefaultTimeBar extends View implements TimeBar {
   }
 
   @Override
-  public int getTimeBarWidth() {
-    return pxToDp(densityDpi, getWidth());
+  public int getTimeBarWidthDp() {
+    return pxToDp(density, getWidth());
   }
 
   // View methods.
@@ -844,7 +843,7 @@ public class DefaultTimeBar extends View implements TimeBar {
     return (int) (dps * displayMetrics.density + 0.5f);
   }
 
-  private static int pxToDp(int densityDpi, int px) {
-    return (int) (px / ((float) densityDpi / DisplayMetrics.DENSITY_DEFAULT));
+  private static int pxToDp(float density, int px) {
+    return (int) (px / density);
   }
 }

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

@@ -836,11 +836,11 @@ public class PlayerControlView extends FrameLayout {
       long delayMs;
       if (player.getPlayWhenReady() && playbackState == Player.STATE_READY) {
         float playbackSpeed = player.getPlaybackParameters().speed;
-        if (playbackSpeed <= 0.1f) {
-          delayMs = 1000;
-        } else if (playbackSpeed <= 5f) {
+        int timeBarWidth = timeBar.getTimeBarWidthDp();
 
-          int timeBarWidth = timeBar.getTimeBarWidth();
+        if (timeBarWidth == 0 || duration == 0) {
+          delayMs = MAX_UPDATE_FREQUENCY_MS;
+        } else {
           // Calculate how many updates needs to be done with DEFAULT_UPDATE_DP
           // to fill up the time bar
           int numberOfUpdates = timeBarWidth / DEFAULT_UPDATE_DP;
@@ -848,13 +848,6 @@ public class PlayerControlView extends FrameLayout {
           // Calculate the designated update interval, taking duration into consideration as well
           long mediaTimeUpdatePeriodMs = duration / numberOfUpdates;
 
-          // Limit the designated update interval, to avoid too frequent / infrequent updates
-          if (mediaTimeUpdatePeriodMs < MIN_UPDATE_FREQUENCY_MS) {
-            mediaTimeUpdatePeriodMs = MIN_UPDATE_FREQUENCY_MS;
-          } else if (mediaTimeUpdatePeriodMs >= MAX_UPDATE_FREQUENCY_MS) {
-            mediaTimeUpdatePeriodMs = MAX_UPDATE_FREQUENCY_MS;
-          }
-
           // Calculate the delay needed from the current position until the next update is due
           long mediaTimeDelayMs = mediaTimeUpdatePeriodMs - (position % mediaTimeUpdatePeriodMs);
 
@@ -866,11 +859,16 @@ public class PlayerControlView extends FrameLayout {
           // Calculate the delay until the next update (in real time), taking
           // playbackSpeed into consideration
           delayMs = playbackSpeed == 1 ? mediaTimeDelayMs : (long) (mediaTimeDelayMs / playbackSpeed);
-        } else {
-          delayMs = 200;
+
+          // Limit the delay if needed, to avoid too frequent / infrequent updates
+          if (delayMs < MIN_UPDATE_FREQUENCY_MS) {
+            delayMs = MIN_UPDATE_FREQUENCY_MS;
+          } else if (delayMs >= MAX_UPDATE_FREQUENCY_MS) {
+            delayMs = MAX_UPDATE_FREQUENCY_MS;
+          }
         }
       } else {
-        delayMs = 1000;
+        delayMs = MAX_UPDATE_FREQUENCY_MS;
       }
       postDelayed(updateProgressAction, delayMs);
     }

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

@@ -102,7 +102,7 @@ public interface TimeBar {
      *
      * @return Width of time bar in dps
      */
-    int getTimeBarWidth();
+    int getTimeBarWidthDp();
 
   /**
    * Listener for scrubbing events.