Change 2nd and later burn-in protection intervals to 2 mins (5b9d4199) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/policy/BurnInProtectionHelper.java

+8 −3

Original line number	Diff line number	Diff line
		@@ -43,7 +43,10 @@ public class BurnInProtectionHelper implements DisplayManager.DisplayListener,
		// Default value when max burnin radius is not set.
		public static final int BURN_IN_MAX_RADIUS_DEFAULT = -1;

		private static final long BURNIN_PROTECTION_WAKEUP_INTERVAL_MS = TimeUnit.MINUTES.toMillis(1);
		private static final long BURNIN_PROTECTION_FIRST_WAKEUP_INTERVAL_MS =
		TimeUnit.MINUTES.toMillis(1);
		private static final long BURNIN_PROTECTION_SUBSEQUENT_WAKEUP_INTERVAL_MS =
		TimeUnit.MINUTES.toMillis(2);
		private static final long BURNIN_PROTECTION_MINIMAL_INTERVAL_MS = TimeUnit.SECONDS.toMillis(10);

		private static final boolean DEBUG = false;
		@@ -138,6 +141,9 @@ public class BurnInProtectionHelper implements DisplayManager.DisplayListener,
		// We don't want to adjust offsets immediately after the device goes into ambient mode.
		// Instead, we want to wait until it's more likely that the user is not observing the
		// screen anymore.
		final long interval = mFirstUpdate
		? BURNIN_PROTECTION_FIRST_WAKEUP_INTERVAL_MS
		: BURNIN_PROTECTION_SUBSEQUENT_WAKEUP_INTERVAL_MS;
		if (mFirstUpdate) {
		mFirstUpdate = false;
		} else {
		@@ -156,8 +162,7 @@ public class BurnInProtectionHelper implements DisplayManager.DisplayListener,
		// Next adjustment at least ten seconds in the future.
		long nextWall = nowWall + BURNIN_PROTECTION_MINIMAL_INTERVAL_MS;
		// And aligned to the minute.
		nextWall = nextWall - nextWall % BURNIN_PROTECTION_WAKEUP_INTERVAL_MS
		+ BURNIN_PROTECTION_WAKEUP_INTERVAL_MS;
		nextWall = (nextWall - (nextWall % interval)) + interval;
		// Use elapsed real time that is adjusted to full minute on wall clock.
		final long nextElapsed = nowElapsed + (nextWall - nowWall);
		if (DEBUG) {