fix [3369027] Sensor.TYPE_ROTATION_VECTOR is unstable and returns NaNs when running slowly

The cut-off frequency of the lowpass filter was too high
for the sampling rate used by DELAY_NORMAL.

Now we use the same filters used for the gravity vector
(cascaded biquad at 1.5 Hz)

Change-Id: I319dc4f449a3abd553d61b196a9ddcf7782f912d

1 files changed, 2 insertions, 2 deletions

diff --git a/services/sensorservice/RotationVectorSensor.h b/services/sensorservice/RotationVectorSensor.h
index b7c9512..17699f8 100644
--- a/services/sensorservice/RotationVectorSensor.h
+++ b/services/sensorservice/RotationVectorSensor.h
@@ -38,9 +38,9 @@ class RotationVectorSensor : public SensorInterface {
     double mAccTime;
     double mMagTime;
     SecondOrderLowPassFilter mALowPass;
-    BiquadFilter mAX, mAY, mAZ;
+    CascadedBiquadFilter mAX, mAY, mAZ;
     SecondOrderLowPassFilter mMLowPass;
-    BiquadFilter mMX, mMY, mMZ;
+    CascadedBiquadFilter mMX, mMY, mMZ;
 
 public:
     RotationVectorSensor(sensor_t const* list, size_t count);