Merge pull request #5496 from szaboa:dev-v2-5040

PiperOrigin-RevId: 237412166

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;
@@ -242,13 +243,14 @@ public class DefaultTimeBar extends View implements TimeBar {
     // Calculate the dimensions and paints for drawn elements.
     Resources res = context.getResources();
     DisplayMetrics displayMetrics = res.getDisplayMetrics();
-    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);
-    int defaultAdMarkerWidth = dpToPx(displayMetrics, DEFAULT_AD_MARKER_WIDTH_DP);
-    int defaultScrubberEnabledSize = dpToPx(displayMetrics, DEFAULT_SCRUBBER_ENABLED_SIZE_DP);
-    int defaultScrubberDisabledSize = dpToPx(displayMetrics, DEFAULT_SCRUBBER_DISABLED_SIZE_DP);
-    int defaultScrubberDraggedSize = dpToPx(displayMetrics, DEFAULT_SCRUBBER_DRAGGED_SIZE_DP);
+    density = displayMetrics.density;
+    fineScrubYThreshold = dpToPx(density, FINE_SCRUB_Y_THRESHOLD_DP);
+    int defaultBarHeight = dpToPx(density, DEFAULT_BAR_HEIGHT_DP);
+    int defaultTouchTargetHeight = dpToPx(density, DEFAULT_TOUCH_TARGET_HEIGHT_DP);
+    int defaultAdMarkerWidth = dpToPx(density, DEFAULT_AD_MARKER_WIDTH_DP);
+    int defaultScrubberEnabledSize = dpToPx(density, DEFAULT_SCRUBBER_ENABLED_SIZE_DP);
+    int defaultScrubberDisabledSize = dpToPx(density, DEFAULT_SCRUBBER_DISABLED_SIZE_DP);
+    int defaultScrubberDraggedSize = dpToPx(density, DEFAULT_SCRUBBER_DRAGGED_SIZE_DP);
     if (attrs != null) {
       TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.DefaultTimeBar, 0,
           0);
@@ -437,6 +439,14 @@ public class DefaultTimeBar extends View implements TimeBar {
   }
 
   @Override
+  public long getPreferredUpdateDelay() {
+    int timeBarWidthDp = pxToDp(density, progressBar.width());
+    return timeBarWidthDp == 0 || duration == 0 || duration == C.TIME_UNSET
+        ? Long.MAX_VALUE
+        : duration / timeBarWidthDp;
+  }
+
+  @Override
   public void setAdGroupTimesMs(@Nullable long[] adGroupTimesMs, @Nullable boolean[] playedAdGroups,
       int adGroupCount) {
     Assertions.checkArgument(adGroupCount == 0
@@ -832,7 +842,11 @@ public class DefaultTimeBar extends View implements TimeBar {
     return 0x33000000 | (adMarkerColor & 0x00FFFFFF);
   }
 
-  private static int dpToPx(DisplayMetrics displayMetrics, int dps) {
-    return (int) (dps * displayMetrics.density + 0.5f);
+  private static int dpToPx(float density, int dps) {
+    return (int) (dps * density + 0.5f);
+  }
+
+  private static int pxToDp(float density, int px) {
+    return (int) (px / density);
   }
 }

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

@@ -85,6 +85,14 @@ public interface TimeBar {
   void setDuration(long duration);
 
   /**
+   * Returns the preferred delay in milliseconds of media time after which the time bar position
+   * should be updated.
+   *
+   * @return Preferred delay, in milliseconds of media time.
+   */
+  long getPreferredUpdateDelay();
+
+  /**
    * Sets the times of ad groups and whether each ad group has been played.
    *
    * @param adGroupTimesMs An array where the first {@code adGroupCount} elements are the times of

library/ui/src/main/res/values/attrs.xml

@@ -42,6 +42,7 @@
     <flag name="all" value="2"/>
   </attr>
   <attr name="show_shuffle_button" format="boolean"/>
+  <attr name="time_bar_min_update_interval" format="integer"/>
 
   <declare-styleable name="PlayerView">
     <attr name="use_artwork" format="boolean"/>
@@ -66,6 +67,7 @@
     <attr name="fastforward_increment"/>
     <attr name="repeat_toggle_modes"/>
     <attr name="show_shuffle_button"/>
+    <attr name="time_bar_min_update_interval"/>
     <attr name="controller_layout_id"/>
   </declare-styleable>
 
@@ -79,6 +81,7 @@
     <attr name="fastforward_increment"/>
     <attr name="repeat_toggle_modes"/>
     <attr name="show_shuffle_button"/>
+    <attr name="time_bar_min_update_interval"/>
     <attr name="controller_layout_id"/>
   </declare-styleable>