Collect and log jank statistics in the Camera.

This detects and logs sequences of camera timestamps where the
delta between the the current and last frame exceeds the
previous delta by a percentage threshold. This should only occur
when there are visible janks in the camera preview.

Bug: 19987252

Change-Id: Icced48be8232bba625aa501b2b1f5c111dbb5573

2 files changed, 7 insertions, 0 deletions

diff --git a/src_pd/com/android/camera/stats/UsageStatistics.java b/src_pd/com/android/camera/stats/UsageStatistics.java
index 5fd9a5dd3..924b6d1a1 100644
--- a/src_pd/com/android/camera/stats/UsageStatistics.java
+++ b/src_pd/com/android/camera/stats/UsageStatistics.java
@@ -56,6 +56,9 @@ public class UsageStatistics {
     public void backgrounded() {
     }
 
+    public void cameraFrameDrop(double deltaMs, double previousDeltaMs) {
+    }
+
     public void storageWarning(long storageSpace) {
     }
 
diff --git a/src_pd/com/android/camera/util/GservicesHelper.java b/src_pd/com/android/camera/util/GservicesHelper.java
index c08f842dc..12ae56a5e 100644
--- a/src_pd/com/android/camera/util/GservicesHelper.java
+++ b/src_pd/com/android/camera/util/GservicesHelper.java
@@ -33,6 +33,10 @@ public class GservicesHelper {
         return false;
     }
 
+    public static boolean isJankStatisticsEnabled(ContentResolver contentResolver) {
+        return false;
+    }
+
     public static int getCaptureSupportLevelOverrideBack(ContentResolver contentResolver) {
         return -1;
     }