am 61220e88: am bbbab26e: am 2c180499: Merge "Revert velocity damping. Bug: 4364920" into honeycomb-mr2

* commit '61220e880ac4d9d76b7fd50744439e68e929c697':
  Revert velocity damping. Bug: 4364920

2 files changed, 0 insertions, 14 deletions

diff --git a/include/ui/Input.h b/include/ui/Input.h
index 3b5aba4df9a7..c9f694a8f0e9 100644
--- a/include/ui/Input.h
+++ b/include/ui/Input.h
@@ -655,11 +655,6 @@ private:
     // Oldest sample to consider when calculating the velocity.
     static const nsecs_t MAX_AGE = 200 * 1000000; // 200 ms
 
-    // When the total duration of the window of samples being averaged is less
-    // than the window size, the resulting velocity is scaled to reduce the impact
-    // of overestimation in short traces.
-    static const nsecs_t MIN_WINDOW = 100 * 1000000; // 100 ms
-
     // The minimum duration between samples when estimating velocity.
     static const nsecs_t MIN_DURATION = 10 * 1000000; // 10 ms
 
diff --git a/libs/ui/Input.cpp b/libs/ui/Input.cpp
index e95dbe4745d7..0af7f8043c35 100644
--- a/libs/ui/Input.cpp
+++ b/libs/ui/Input.cpp
@@ -700,7 +700,6 @@ bool MotionEvent::isTouchEvent(int32_t source, int32_t action) {
 
 const uint32_t VelocityTracker::HISTORY_SIZE;
 const nsecs_t VelocityTracker::MAX_AGE;
-const nsecs_t VelocityTracker::MIN_WINDOW;
 const nsecs_t VelocityTracker::MIN_DURATION;
 
 VelocityTracker::VelocityTracker() {
@@ -891,14 +890,6 @@ bool VelocityTracker::getVelocity(uint32_t id, float* outVx, float* outVy) const
 
         // Make sure we used at least one sample.
         if (samplesUsed != 0) {
-            // Scale the velocity linearly if the window of samples is small.
-            nsecs_t totalDuration = newestMovement.eventTime - oldestMovement.eventTime;
-            if (totalDuration < MIN_WINDOW) {
-                float scale = float(totalDuration) / float(MIN_WINDOW);
-                accumVx *= scale;
-                accumVy *= scale;
-            }
-
             *outVx = accumVx;
             *outVy = accumVy;
             return true;