More VelocityTracker refactoring.

Bug: 6413587
Change-Id: Ida1152e7a34d5fe5caab5e6b5e1bc79f6c7a25e6

3 files changed, 10 insertions, 21 deletions

diff --git a/core/java/android/view/VelocityTracker.java b/core/java/android/view/VelocityTracker.java
index f703e34..f5870e1 100644
--- a/core/java/android/view/VelocityTracker.java
+++ b/core/java/android/view/VelocityTracker.java
@@ -60,8 +60,7 @@ public final class VelocityTracker implements Poolable<VelocityTracker> {
     private static native void nativeComputeCurrentVelocity(int ptr, int units, float maxVelocity);
     private static native float nativeGetXVelocity(int ptr, int id);
     private static native float nativeGetYVelocity(int ptr, int id);
-    private static native boolean nativeGetEstimator(int ptr, int id,
-            int degree, int horizonMillis, Estimator outEstimator);
+    private static native boolean nativeGetEstimator(int ptr, int id, Estimator outEstimator);
 
     /**
      * Retrieve a new VelocityTracker object to watch the velocity of a
@@ -227,21 +226,17 @@ public final class VelocityTracker implements Poolable<VelocityTracker> {
      * this method.
      *
      * @param id Which pointer's velocity to return.
-     * @param degree The desired polynomial degree.  The actual estimator may have
-     * a lower degree than what is requested here.  If -1, uses the default degree.
-     * @param horizonMillis The maximum age of the oldest sample to consider, in milliseconds.
-     * If -1, uses the default horizon.
      * @param outEstimator The estimator to populate.
      * @return True if an estimator was obtained, false if there is no information
      * available about the pointer.
      *
      * @hide For internal use only.  Not a final API.
      */
-    public boolean getEstimator(int id, int degree, int horizonMillis, Estimator outEstimator) {
+    public boolean getEstimator(int id, Estimator outEstimator) {
         if (outEstimator == null) {
             throw new IllegalArgumentException("outEstimator must not be null");
         }
-        return nativeGetEstimator(mPtr, id, degree, horizonMillis, outEstimator);
+        return nativeGetEstimator(mPtr, id, outEstimator);
     }
 
     /**
diff --git a/core/java/com/android/internal/widget/PointerLocationView.java b/core/java/com/android/internal/widget/PointerLocationView.java
index 1d6af90..85e6c16 100644
--- a/core/java/com/android/internal/widget/PointerLocationView.java
+++ b/core/java/com/android/internal/widget/PointerLocationView.java
@@ -527,7 +527,7 @@ public class PointerLocationView extends View implements InputDeviceListener {
                 ps.addTrace(coords.x, coords.y);
                 ps.mXVelocity = mVelocity.getXVelocity(id);
                 ps.mYVelocity = mVelocity.getYVelocity(id);
-                mVelocity.getEstimator(id, -1, -1, ps.mEstimator);
+                mVelocity.getEstimator(id, ps.mEstimator);
                 ps.mToolType = event.getToolType(i);
             }
         }
diff --git a/core/jni/android_view_VelocityTracker.cpp b/core/jni/android_view_VelocityTracker.cpp
index 04d1056..0180e0a 100644
--- a/core/jni/android_view_VelocityTracker.cpp
+++ b/core/jni/android_view_VelocityTracker.cpp
@@ -48,8 +48,7 @@ public:
     void addMovement(const MotionEvent* event);
     void computeCurrentVelocity(int32_t units, float maxVelocity);
     void getVelocity(int32_t id, float* outVx, float* outVy);
-    bool getEstimator(int32_t id, uint32_t degree, nsecs_t horizon,
-            VelocityTracker::Estimator* outEstimator);
+    bool getEstimator(int32_t id, VelocityTracker::Estimator* outEstimator);
 
 private:
     struct Velocity {
@@ -129,9 +128,8 @@ void VelocityTrackerState::getVelocity(int32_t id, float* outVx, float* outVy) {
     }
 }
 
-bool VelocityTrackerState::getEstimator(int32_t id, uint32_t degree, nsecs_t horizon,
-        VelocityTracker::Estimator* outEstimator) {
-    return mVelocityTracker.getEstimator(id, degree, horizon, outEstimator);
+bool VelocityTrackerState::getEstimator(int32_t id, VelocityTracker::Estimator* outEstimator) {
+    return mVelocityTracker.getEstimator(id, outEstimator);
 }
 
 
@@ -186,14 +184,10 @@ static jfloat android_view_VelocityTracker_nativeGetYVelocity(JNIEnv* env, jclas
 }
 
 static jboolean android_view_VelocityTracker_nativeGetEstimator(JNIEnv* env, jclass clazz,
-        jint ptr, jint id, jint degree, jint horizonMillis, jobject outEstimatorObj) {
+        jint ptr, jint id, jobject outEstimatorObj) {
     VelocityTrackerState* state = reinterpret_cast<VelocityTrackerState*>(ptr);
     VelocityTracker::Estimator estimator;
-    bool result = state->getEstimator(id,
-            degree < 0 ? VelocityTracker::DEFAULT_DEGREE : uint32_t(degree),
-            horizonMillis < 0 ? VelocityTracker::DEFAULT_HORIZON :
-                    nsecs_t(horizonMillis) * 1000000L,
-            &estimator);
+    bool result = state->getEstimator(id, &estimator);
 
     jfloatArray xCoeffObj = jfloatArray(env->GetObjectField(outEstimatorObj,
             gEstimatorClassInfo.xCoeff));
@@ -236,7 +230,7 @@ static JNINativeMethod gVelocityTrackerMethods[] = {
             "(II)F",
             (void*)android_view_VelocityTracker_nativeGetYVelocity },
     { "nativeGetEstimator",
-            "(IIIILandroid/view/VelocityTracker$Estimator;)Z",
+            "(IILandroid/view/VelocityTracker$Estimator;)Z",
             (void*)android_view_VelocityTracker_nativeGetEstimator },
 };