Handle DISPLAY_EVENT_FRAME_RATE_OVERRIDE

When getting DISPLAY_EVENT_FRAME_RATE_OVERRIDE from SurfaceFlinger,
expose the overridden frame rate to the relevant application
if the current refresh rate allows that.

Bug: 169271059
Bug: 169271062
Bug: 170503758
Test: manual test using SF backdoor
adb shell service call SurfaceFlinger 1039 i32 <uid> f <refresh rate>

Change-Id: I6ae1a98e6ca13e9d3d095a5713a6b0ca99652256

1 files changed, 24 insertions, 1 deletions

diff --git a/core/java/android/view/DisplayInfo.java b/core/java/android/view/DisplayInfo.java
index fe9a1a76bbaf..020160584f67 100644
--- a/core/java/android/view/DisplayInfo.java
+++ b/core/java/android/view/DisplayInfo.java
@@ -261,6 +261,11 @@ public final class DisplayInfo implements Parcelable {
     public String ownerPackageName;
 
     /**
+     * The refresh rate override for this app. 0 means no override.
+     */
+    public float refreshRateOverride;
+
+    /**
      * @hide
      * Get current remove mode of the display - what actions should be performed with the display's
      * content when it is removed.
@@ -332,7 +337,8 @@ public final class DisplayInfo implements Parcelable {
                 && state == other.state
                 && ownerUid == other.ownerUid
                 && Objects.equals(ownerPackageName, other.ownerPackageName)
-                && removeMode == other.removeMode;
+                && removeMode == other.removeMode
+                && refreshRateOverride == other.refreshRateOverride;
     }
 
     @Override
@@ -376,6 +382,7 @@ public final class DisplayInfo implements Parcelable {
         ownerUid = other.ownerUid;
         ownerPackageName = other.ownerPackageName;
         removeMode = other.removeMode;
+        refreshRateOverride = other.refreshRateOverride;
     }
 
     public void readFromParcel(Parcel source) {
@@ -421,6 +428,7 @@ public final class DisplayInfo implements Parcelable {
         ownerPackageName = source.readString8();
         uniqueId = source.readString8();
         removeMode = source.readInt();
+        refreshRateOverride = source.readFloat();
     }
 
     @Override
@@ -465,6 +473,7 @@ public final class DisplayInfo implements Parcelable {
         dest.writeString8(ownerPackageName);
         dest.writeString8(uniqueId);
         dest.writeInt(removeMode);
+        dest.writeFloat(refreshRateOverride);
     }
 
     @Override
@@ -472,6 +481,17 @@ public final class DisplayInfo implements Parcelable {
         return 0;
     }
 
+    /**
+     * Returns the refresh rate the application would experience.
+     */
+    public float getRefreshRate() {
+        if (refreshRateOverride > 0) {
+            return refreshRateOverride;
+        }
+
+        return getMode().getRefreshRate();
+    }
+
     public Display.Mode getMode() {
         return findMode(modeId);
     }
@@ -675,6 +695,9 @@ public final class DisplayInfo implements Parcelable {
         }
         sb.append(", removeMode ");
         sb.append(removeMode);
+        sb.append(", refreshRateOverride ");
+        sb.append(refreshRateOverride);
+
         sb.append("}");
         return sb.toString();
     }