commit 0581f5b05b13eaa19cf26e270fb619d1f62bb069
author Sunny Goyal <sunnygoyal@google.com> Thu Aug 06 22:54:57 2020 +0000
committer Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> Thu Aug 06 22:54:57 2020 +0000
tree 1b12364667cac5e4a0aa33b36615f8dc103b24c6
parent 330113561e9dc092499fe06c47b1bf140e04ad93
parent f58a2b9cd982a6a761deaa05b3d3e9802df040c3

Fixing wrong velocity state when there are too few samples am: f58a2b9cd9

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/12317133

Change-Id: Id9c756552c08d7690b99987dafadc13448a0c236

quickstep/src/com/android/quickstep/util/MotionPauseDetector.java

diff --git a/quickstep/src/com/android/quickstep/util/MotionPauseDetector.java b/quickstep/src/com/android/quickstep/util/MotionPauseDetector.java
index a5d4568..969fa50 100644
--- a/quickstep/src/com/android/quickstep/util/MotionPauseDetector.java
+++ b/quickstep/src/com/android/quickstep/util/MotionPauseDetector.java
@@ -358,18 +358,23 @@
 
             if (count < 3) {
                 // Too few samples
-                if (count == 2) {
-                    int endPos = pointPos - 1;
-                    if (endPos < 0) {
-                        endPos += HISTORY_SIZE;
+                switch (count) {
+                    case 2: {
+                        int endPos = pointPos - 1;
+                        if (endPos < 0) {
+                            endPos += HISTORY_SIZE;
+                        }
+                        float denominator = eventTime - mHistoricTimes[endPos];
+                        if (denominator != 0) {
+                            return (mHistoricPos[pointPos] - mHistoricPos[endPos]) / denominator;
+                        }
                     }
-                    float denominator = eventTime - mHistoricTimes[endPos];
-                    if (denominator != 0) {
-                        return (eventTime - mHistoricPos[endPos]) / denominator;
-
-                    }
+                    // fall through
+                    case 1:
+                        return 0f;
+                    default:
+                        return null;
                 }
-                return null;
             }
 
             float Sxx = sxi2 - sxi * sxi / count;