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am 0da554ac: Merge "fix an overflow in the orientation sensonr calculations" into jb-mr1-dev

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* commit '0da554acfbf7cf0b8e522c5b8b83588cf6f72ddf':
  fix an overflow in the orientation sensonr calculations
This commit is contained in:
Mathias Agopian
2012-10-29 16:52:41 -07:00
committed by Android Git Automerger
parent 40d076e617 0da554acfb
commit fdd714f8d5
1 changed files with 5 additions and 6 deletions
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11
core/java/android/hardware/LegacySensorManager.java
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@@ -371,7 +371,7 @@ final class LegacySensorManager {
private static final float PREDICTION_RATIO = 1.0f/3.0f;
private static final float PREDICTION_TIME = (SENSORS_RATE_MS*COUNT/1000.0f)*PREDICTION_RATIO;
private float mV[] = new float[COUNT*2];
private float mT[] = new float[COUNT*2];
private long mT[] = new long[COUNT*2];
private int mIndex;
public LmsFilter() {
@@ -381,7 +381,6 @@ final class LegacySensorManager {
public float filter(long time, float in) {
float v = in;
final float ns = 1.0f / 1000000000.0f;
final float t = time*ns;
float v1 = mV[mIndex];
if ((v-v1) > 180) {
v -= 360;
@@ -396,9 +395,9 @@ final class LegacySensorManager {
if (mIndex >= COUNT*2)
mIndex = COUNT;
mV[mIndex] = v;
mT[mIndex] = t;
mT[mIndex] = time;
mV[mIndex-COUNT] = v;
mT[mIndex-COUNT] = t;
mT[mIndex-COUNT] = time;
float A, B, C, D, E;
float a, b;
@@ -408,8 +407,8 @@ final class LegacySensorManager {
for (i=0 ; i<COUNT-1 ; i++) {
final int j = mIndex - 1 - i;
final float Z = mV[j];
final float T = 0.5f*(mT[j] + mT[j+1]) - t;
float dT = mT[j] - mT[j+1];
final float T = (mT[j]/2 + mT[j+1]/2 - time)*ns;
float dT = (mT[j] - mT[j+1])*ns;
dT *= dT;
A += Z*dT;
B += T*(T*dT);