Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server; |
| 18 | |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 19 | import android.hardware.Sensor; |
| 20 | import android.hardware.SensorEvent; |
| 21 | import android.hardware.SensorEventListener; |
| 22 | import android.hardware.SensorManager; |
| 23 | import android.os.Handler; |
| 24 | import android.os.Message; |
| 25 | import android.os.PowerManager; |
| 26 | import android.os.SystemClock; |
| 27 | import android.util.Slog; |
| 28 | |
| 29 | import java.lang.Float; |
| 30 | |
| 31 | /** |
| 32 | * Determines if the device has been set upon a stationary object. |
| 33 | */ |
| 34 | public class AnyMotionDetector { |
| 35 | interface DeviceIdleCallback { |
| 36 | public void onAnyMotionResult(int result); |
| 37 | } |
| 38 | |
| 39 | private static final String TAG = "AnyMotionDetector"; |
| 40 | |
| 41 | private static final boolean DEBUG = false; |
| 42 | |
| 43 | /** Stationary status is unknown due to insufficient orientation measurements. */ |
| 44 | public static final int RESULT_UNKNOWN = -1; |
| 45 | |
| 46 | /** Device is stationary, e.g. still on a table. */ |
| 47 | public static final int RESULT_STATIONARY = 0; |
| 48 | |
| 49 | /** Device has been moved. */ |
| 50 | public static final int RESULT_MOVED = 1; |
| 51 | |
| 52 | /** Orientation measurements are being performed or are planned. */ |
| 53 | private static final int STATE_INACTIVE = 0; |
| 54 | |
| 55 | /** No orientation measurements are being performed or are planned. */ |
| 56 | private static final int STATE_ACTIVE = 1; |
| 57 | |
| 58 | /** Current measurement state. */ |
| 59 | private int mState; |
| 60 | |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 61 | /** Threshold energy above which the device is considered moving. */ |
| 62 | private final float THRESHOLD_ENERGY = 5f; |
| 63 | |
| 64 | /** The duration of the accelerometer orientation measurement. */ |
| 65 | private static final long ORIENTATION_MEASUREMENT_DURATION_MILLIS = 2500; |
| 66 | |
| 67 | /** The maximum duration we will collect accelerometer data. */ |
| 68 | private static final long ACCELEROMETER_DATA_TIMEOUT_MILLIS = 3000; |
| 69 | |
| 70 | /** The interval between accelerometer orientation measurements. */ |
| 71 | private static final long ORIENTATION_MEASUREMENT_INTERVAL_MILLIS = 5000; |
| 72 | |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 73 | /** The maximum duration we will hold a wakelock to determine stationary status. */ |
| 74 | private static final long WAKELOCK_TIMEOUT_MILLIS = 30000; |
| 75 | |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 76 | /** |
| 77 | * The duration in milliseconds after which an orientation measurement is considered |
| 78 | * too stale to be used. |
| 79 | */ |
| 80 | private static final int STALE_MEASUREMENT_TIMEOUT_MILLIS = 2 * 60 * 1000; |
| 81 | |
| 82 | /** The accelerometer sampling interval. */ |
| 83 | private static final int SAMPLING_INTERVAL_MILLIS = 40; |
| 84 | |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 85 | private final Handler mHandler; |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 86 | private final Object mLock = new Object(); |
| 87 | private Sensor mAccelSensor; |
| 88 | private SensorManager mSensorManager; |
| 89 | private PowerManager.WakeLock mWakeLock; |
| 90 | |
Joe LaPenna | 23d681b | 2015-08-27 15:12:11 -0700 | [diff] [blame] | 91 | /** Threshold angle in degrees beyond which the device is considered moving. */ |
| 92 | private final float mThresholdAngle; |
| 93 | |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 94 | /** The minimum number of samples required to detect AnyMotion. */ |
| 95 | private int mNumSufficientSamples; |
| 96 | |
| 97 | /** True if an orientation measurement is in progress. */ |
| 98 | private boolean mMeasurementInProgress; |
| 99 | |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 100 | /** True if sendMessageDelayed() for the mMeasurementTimeout callback has been scheduled */ |
| 101 | private boolean mMeasurementTimeoutIsActive; |
| 102 | |
| 103 | /** True if sendMessageDelayed() for the mWakelockTimeout callback has been scheduled */ |
| 104 | private boolean mWakelockTimeoutIsActive; |
| 105 | |
| 106 | /** True if sendMessageDelayed() for the mSensorRestart callback has been scheduled */ |
| 107 | private boolean mSensorRestartIsActive; |
| 108 | |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 109 | /** The most recent gravity vector. */ |
| 110 | private Vector3 mCurrentGravityVector = null; |
| 111 | |
| 112 | /** The second most recent gravity vector. */ |
| 113 | private Vector3 mPreviousGravityVector = null; |
| 114 | |
| 115 | /** Running sum of squared errors. */ |
| 116 | private RunningSignalStats mRunningStats; |
| 117 | |
| 118 | private DeviceIdleCallback mCallback = null; |
| 119 | |
Dianne Hackborn | 42df4fb | 2015-08-14 16:43:14 -0700 | [diff] [blame] | 120 | public AnyMotionDetector(PowerManager pm, Handler handler, SensorManager sm, |
Joe LaPenna | 23d681b | 2015-08-27 15:12:11 -0700 | [diff] [blame] | 121 | DeviceIdleCallback callback, float thresholdAngle) { |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 122 | if (DEBUG) Slog.d(TAG, "AnyMotionDetector instantiated."); |
Kevin Gabayan | 5e48844 | 2016-03-24 13:05:23 -0700 | [diff] [blame] | 123 | synchronized (mLock) { |
| 124 | mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); |
| 125 | mWakeLock.setReferenceCounted(false); |
| 126 | mHandler = handler; |
| 127 | mSensorManager = sm; |
| 128 | mAccelSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); |
| 129 | mMeasurementInProgress = false; |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 130 | mMeasurementTimeoutIsActive = false; |
| 131 | mWakelockTimeoutIsActive = false; |
| 132 | mSensorRestartIsActive = false; |
Kevin Gabayan | 5e48844 | 2016-03-24 13:05:23 -0700 | [diff] [blame] | 133 | mState = STATE_INACTIVE; |
| 134 | mCallback = callback; |
| 135 | mThresholdAngle = thresholdAngle; |
| 136 | mRunningStats = new RunningSignalStats(); |
| 137 | mNumSufficientSamples = (int) Math.ceil( |
| 138 | ((double)ORIENTATION_MEASUREMENT_DURATION_MILLIS / SAMPLING_INTERVAL_MILLIS)); |
| 139 | if (DEBUG) Slog.d(TAG, "mNumSufficientSamples = " + mNumSufficientSamples); |
| 140 | } |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | /* |
| 144 | * Acquire accel data until we determine AnyMotion status. |
| 145 | */ |
| 146 | public void checkForAnyMotion() { |
Kevin Gabayan | 5e48844 | 2016-03-24 13:05:23 -0700 | [diff] [blame] | 147 | if (DEBUG) { |
| 148 | Slog.d(TAG, "checkForAnyMotion(). mState = " + mState); |
| 149 | } |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 150 | if (mState != STATE_ACTIVE) { |
Kevin Gabayan | 5e48844 | 2016-03-24 13:05:23 -0700 | [diff] [blame] | 151 | synchronized (mLock) { |
| 152 | mState = STATE_ACTIVE; |
| 153 | if (DEBUG) { |
| 154 | Slog.d(TAG, "Moved from STATE_INACTIVE to STATE_ACTIVE."); |
| 155 | } |
| 156 | mCurrentGravityVector = null; |
| 157 | mPreviousGravityVector = null; |
| 158 | mWakeLock.acquire(); |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 159 | Message wakelockTimeoutMsg = Message.obtain(mHandler, mWakelockTimeout); |
| 160 | mHandler.sendMessageDelayed(wakelockTimeoutMsg, WAKELOCK_TIMEOUT_MILLIS); |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 161 | mWakelockTimeoutIsActive = true; |
Kevin Gabayan | 5e48844 | 2016-03-24 13:05:23 -0700 | [diff] [blame] | 162 | startOrientationMeasurementLocked(); |
| 163 | } |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 164 | } |
| 165 | } |
| 166 | |
Dianne Hackborn | 42df4fb | 2015-08-14 16:43:14 -0700 | [diff] [blame] | 167 | public void stop() { |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 168 | synchronized (mLock) { |
| 169 | if (mState == STATE_ACTIVE) { |
Kevin Gabayan | 5e48844 | 2016-03-24 13:05:23 -0700 | [diff] [blame] | 170 | mState = STATE_INACTIVE; |
| 171 | if (DEBUG) Slog.d(TAG, "Moved from STATE_ACTIVE to STATE_INACTIVE."); |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 172 | } |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 173 | mHandler.removeCallbacks(mMeasurementTimeout); |
| 174 | mHandler.removeCallbacks(mSensorRestart); |
| 175 | mMeasurementTimeoutIsActive = false; |
| 176 | mSensorRestartIsActive = false; |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 177 | if (mMeasurementInProgress) { |
| 178 | mMeasurementInProgress = false; |
| 179 | mSensorManager.unregisterListener(mListener); |
| 180 | } |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 181 | mCurrentGravityVector = null; |
| 182 | mPreviousGravityVector = null; |
| 183 | if (mWakeLock.isHeld()) { |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 184 | mHandler.removeCallbacks(mWakelockTimeout); |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 185 | mWakelockTimeoutIsActive = false; |
| 186 | mWakeLock.release(); |
Dianne Hackborn | 42df4fb | 2015-08-14 16:43:14 -0700 | [diff] [blame] | 187 | } |
Dianne Hackborn | 42df4fb | 2015-08-14 16:43:14 -0700 | [diff] [blame] | 188 | } |
| 189 | } |
| 190 | |
Kevin Gabayan | 5e48844 | 2016-03-24 13:05:23 -0700 | [diff] [blame] | 191 | private void startOrientationMeasurementLocked() { |
| 192 | if (DEBUG) Slog.d(TAG, "startOrientationMeasurementLocked: mMeasurementInProgress=" + |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 193 | mMeasurementInProgress + ", (mAccelSensor != null)=" + (mAccelSensor != null)); |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 194 | if (!mMeasurementInProgress && mAccelSensor != null) { |
| 195 | if (mSensorManager.registerListener(mListener, mAccelSensor, |
| 196 | SAMPLING_INTERVAL_MILLIS * 1000)) { |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 197 | mMeasurementInProgress = true; |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 198 | mRunningStats.reset(); |
| 199 | } |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 200 | Message measurementTimeoutMsg = Message.obtain(mHandler, mMeasurementTimeout); |
| 201 | mHandler.sendMessageDelayed(measurementTimeoutMsg, ACCELEROMETER_DATA_TIMEOUT_MILLIS); |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 202 | mMeasurementTimeoutIsActive = true; |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 203 | } |
| 204 | } |
| 205 | |
| 206 | private int stopOrientationMeasurementLocked() { |
| 207 | if (DEBUG) Slog.d(TAG, "stopOrientationMeasurement. mMeasurementInProgress=" + |
| 208 | mMeasurementInProgress); |
| 209 | int status = RESULT_UNKNOWN; |
| 210 | if (mMeasurementInProgress) { |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 211 | mHandler.removeCallbacks(mMeasurementTimeout); |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 212 | mMeasurementTimeoutIsActive = false; |
| 213 | mSensorManager.unregisterListener(mListener); |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 214 | mMeasurementInProgress = false; |
| 215 | mPreviousGravityVector = mCurrentGravityVector; |
| 216 | mCurrentGravityVector = mRunningStats.getRunningAverage(); |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 217 | if (mRunningStats.getSampleCount() == 0) { |
| 218 | Slog.w(TAG, "No accelerometer data acquired for orientation measurement."); |
| 219 | } |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 220 | if (DEBUG) { |
| 221 | Slog.d(TAG, "mRunningStats = " + mRunningStats.toString()); |
| 222 | String currentGravityVectorString = (mCurrentGravityVector == null) ? |
| 223 | "null" : mCurrentGravityVector.toString(); |
| 224 | String previousGravityVectorString = (mPreviousGravityVector == null) ? |
| 225 | "null" : mPreviousGravityVector.toString(); |
| 226 | Slog.d(TAG, "mCurrentGravityVector = " + currentGravityVectorString); |
| 227 | Slog.d(TAG, "mPreviousGravityVector = " + previousGravityVectorString); |
| 228 | } |
| 229 | mRunningStats.reset(); |
| 230 | status = getStationaryStatus(); |
| 231 | if (DEBUG) Slog.d(TAG, "getStationaryStatus() returned " + status); |
| 232 | if (status != RESULT_UNKNOWN) { |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 233 | if (mWakeLock.isHeld()) { |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 234 | mHandler.removeCallbacks(mWakelockTimeout); |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 235 | mWakelockTimeoutIsActive = false; |
| 236 | mWakeLock.release(); |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 237 | } |
Kevin Gabayan | 5e48844 | 2016-03-24 13:05:23 -0700 | [diff] [blame] | 238 | if (DEBUG) { |
| 239 | Slog.d(TAG, "Moved from STATE_ACTIVE to STATE_INACTIVE. status = " + status); |
| 240 | } |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 241 | mState = STATE_INACTIVE; |
| 242 | } else { |
| 243 | /* |
| 244 | * Unknown due to insufficient measurements. Schedule another orientation |
| 245 | * measurement. |
| 246 | */ |
| 247 | if (DEBUG) Slog.d(TAG, "stopOrientationMeasurementLocked(): another measurement" + |
| 248 | " scheduled in " + ORIENTATION_MEASUREMENT_INTERVAL_MILLIS + |
| 249 | " milliseconds."); |
| 250 | Message msg = Message.obtain(mHandler, mSensorRestart); |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 251 | mHandler.sendMessageDelayed(msg, ORIENTATION_MEASUREMENT_INTERVAL_MILLIS); |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 252 | mSensorRestartIsActive = true; |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 253 | } |
| 254 | } |
| 255 | return status; |
| 256 | } |
| 257 | |
| 258 | /* |
| 259 | * Updates mStatus to the current AnyMotion status. |
| 260 | */ |
| 261 | public int getStationaryStatus() { |
| 262 | if ((mPreviousGravityVector == null) || (mCurrentGravityVector == null)) { |
| 263 | return RESULT_UNKNOWN; |
| 264 | } |
| 265 | Vector3 previousGravityVectorNormalized = mPreviousGravityVector.normalized(); |
| 266 | Vector3 currentGravityVectorNormalized = mCurrentGravityVector.normalized(); |
| 267 | float angle = previousGravityVectorNormalized.angleBetween(currentGravityVectorNormalized); |
Joe LaPenna | 23d681b | 2015-08-27 15:12:11 -0700 | [diff] [blame] | 268 | if (DEBUG) Slog.d(TAG, "getStationaryStatus: angle = " + angle |
| 269 | + " energy = " + mRunningStats.getEnergy()); |
| 270 | if ((angle < mThresholdAngle) && (mRunningStats.getEnergy() < THRESHOLD_ENERGY)) { |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 271 | return RESULT_STATIONARY; |
| 272 | } else if (Float.isNaN(angle)) { |
| 273 | /** |
| 274 | * Floating point rounding errors have caused the angle calcuation's dot product to |
| 275 | * exceed 1.0. In such case, we report RESULT_MOVED to prevent devices from rapidly |
| 276 | * retrying this measurement. |
| 277 | */ |
| 278 | return RESULT_MOVED; |
| 279 | } |
| 280 | long diffTime = mCurrentGravityVector.timeMillisSinceBoot - |
| 281 | mPreviousGravityVector.timeMillisSinceBoot; |
| 282 | if (diffTime > STALE_MEASUREMENT_TIMEOUT_MILLIS) { |
| 283 | if (DEBUG) Slog.d(TAG, "getStationaryStatus: mPreviousGravityVector is too stale at " + |
| 284 | diffTime + " ms ago. Returning RESULT_UNKNOWN."); |
| 285 | return RESULT_UNKNOWN; |
| 286 | } |
| 287 | return RESULT_MOVED; |
| 288 | } |
| 289 | |
| 290 | private final SensorEventListener mListener = new SensorEventListener() { |
| 291 | @Override |
| 292 | public void onSensorChanged(SensorEvent event) { |
| 293 | int status = RESULT_UNKNOWN; |
| 294 | synchronized (mLock) { |
| 295 | Vector3 accelDatum = new Vector3(SystemClock.elapsedRealtime(), event.values[0], |
| 296 | event.values[1], event.values[2]); |
| 297 | mRunningStats.accumulate(accelDatum); |
| 298 | |
| 299 | // If we have enough samples, stop accelerometer data acquisition. |
| 300 | if (mRunningStats.getSampleCount() >= mNumSufficientSamples) { |
| 301 | status = stopOrientationMeasurementLocked(); |
| 302 | } |
| 303 | } |
| 304 | if (status != RESULT_UNKNOWN) { |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 305 | mHandler.removeCallbacks(mWakelockTimeout); |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 306 | mWakelockTimeoutIsActive = false; |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 307 | mCallback.onAnyMotionResult(status); |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | @Override |
| 312 | public void onAccuracyChanged(Sensor sensor, int accuracy) { |
| 313 | } |
| 314 | }; |
| 315 | |
| 316 | private final Runnable mSensorRestart = new Runnable() { |
| 317 | @Override |
| 318 | public void run() { |
| 319 | synchronized (mLock) { |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 320 | if (mSensorRestartIsActive == true) { |
| 321 | mSensorRestartIsActive = false; |
| 322 | startOrientationMeasurementLocked(); |
| 323 | } |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 324 | } |
| 325 | } |
| 326 | }; |
| 327 | |
| 328 | private final Runnable mMeasurementTimeout = new Runnable() { |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 329 | @Override |
| 330 | public void run() { |
| 331 | int status = RESULT_UNKNOWN; |
| 332 | synchronized (mLock) { |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 333 | if (mMeasurementTimeoutIsActive == true) { |
| 334 | mMeasurementTimeoutIsActive = false; |
| 335 | if (DEBUG) Slog.i(TAG, "mMeasurementTimeout. Failed to collect sufficient accel " + |
| 336 | "data within " + ACCELEROMETER_DATA_TIMEOUT_MILLIS + " ms. Stopping " + |
| 337 | "orientation measurement."); |
| 338 | status = stopOrientationMeasurementLocked(); |
| 339 | if (status != RESULT_UNKNOWN) { |
| 340 | mHandler.removeCallbacks(mWakelockTimeout); |
| 341 | mWakelockTimeoutIsActive = false; |
| 342 | mCallback.onAnyMotionResult(status); |
| 343 | } |
| 344 | } |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 345 | } |
| 346 | } |
| 347 | }; |
| 348 | |
| 349 | private final Runnable mWakelockTimeout = new Runnable() { |
| 350 | @Override |
| 351 | public void run() { |
| 352 | synchronized (mLock) { |
Nick Vaccaro | 7510fbb | 2016-08-19 12:09:50 -0700 | [diff] [blame] | 353 | if (mWakelockTimeoutIsActive == true) { |
| 354 | mWakelockTimeoutIsActive = false; |
| 355 | stop(); |
| 356 | } |
Kevin Gabayan | dcf4701 | 2016-07-08 10:41:24 -0700 | [diff] [blame] | 357 | } |
| 358 | } |
| 359 | }; |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 360 | |
| 361 | /** |
| 362 | * A timestamped three dimensional vector and some vector operations. |
| 363 | */ |
Kevin Gabayan | b070577 | 2016-06-09 15:40:50 -0700 | [diff] [blame] | 364 | public static final class Vector3 { |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 365 | public long timeMillisSinceBoot; |
| 366 | public float x; |
| 367 | public float y; |
| 368 | public float z; |
| 369 | |
| 370 | public Vector3(long timeMillisSinceBoot, float x, float y, float z) { |
| 371 | this.timeMillisSinceBoot = timeMillisSinceBoot; |
| 372 | this.x = x; |
| 373 | this.y = y; |
| 374 | this.z = z; |
| 375 | } |
| 376 | |
Kevin Gabayan | b070577 | 2016-06-09 15:40:50 -0700 | [diff] [blame] | 377 | public float norm() { |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 378 | return (float) Math.sqrt(dotProduct(this)); |
| 379 | } |
| 380 | |
Kevin Gabayan | b070577 | 2016-06-09 15:40:50 -0700 | [diff] [blame] | 381 | public Vector3 normalized() { |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 382 | float mag = norm(); |
| 383 | return new Vector3(timeMillisSinceBoot, x / mag, y / mag, z / mag); |
| 384 | } |
| 385 | |
| 386 | /** |
| 387 | * Returns the angle between this 3D vector and another given 3D vector. |
| 388 | * Assumes both have already been normalized. |
| 389 | * |
| 390 | * @param other The other Vector3 vector. |
| 391 | * @return angle between this vector and the other given one. |
| 392 | */ |
| 393 | public float angleBetween(Vector3 other) { |
Kevin Gabayan | b070577 | 2016-06-09 15:40:50 -0700 | [diff] [blame] | 394 | Vector3 crossVector = cross(other); |
| 395 | float degrees = Math.abs((float)Math.toDegrees( |
| 396 | Math.atan2(crossVector.norm(), dotProduct(other)))); |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 397 | Slog.d(TAG, "angleBetween: this = " + this.toString() + |
Kevin Gabayan | b070577 | 2016-06-09 15:40:50 -0700 | [diff] [blame] | 398 | ", other = " + other.toString() + ", degrees = " + degrees); |
| 399 | return degrees; |
| 400 | } |
| 401 | |
| 402 | public Vector3 cross(Vector3 v) { |
| 403 | return new Vector3( |
| 404 | v.timeMillisSinceBoot, |
| 405 | y * v.z - z * v.y, |
| 406 | z * v.x - x * v.z, |
| 407 | x * v.y - y * v.x); |
Kevin Gabayan | 89ecf82 | 2015-05-18 12:10:07 -0700 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | @Override |
| 411 | public String toString() { |
| 412 | String msg = ""; |
| 413 | msg += "timeMillisSinceBoot=" + timeMillisSinceBoot; |
| 414 | msg += " | x=" + x; |
| 415 | msg += ", y=" + y; |
| 416 | msg += ", z=" + z; |
| 417 | return msg; |
| 418 | } |
| 419 | |
| 420 | public float dotProduct(Vector3 v) { |
| 421 | return x * v.x + y * v.y + z * v.z; |
| 422 | } |
| 423 | |
| 424 | public Vector3 times(float val) { |
| 425 | return new Vector3(timeMillisSinceBoot, x * val, y * val, z * val); |
| 426 | } |
| 427 | |
| 428 | public Vector3 plus(Vector3 v) { |
| 429 | return new Vector3(v.timeMillisSinceBoot, x + v.x, y + v.y, z + v.z); |
| 430 | } |
| 431 | |
| 432 | public Vector3 minus(Vector3 v) { |
| 433 | return new Vector3(v.timeMillisSinceBoot, x - v.x, y - v.y, z - v.z); |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | /** |
| 438 | * Maintains running statistics on the signal revelant to AnyMotion detection, including: |
| 439 | * <ul> |
| 440 | * <li>running average. |
| 441 | * <li>running sum-of-squared-errors as the energy of the signal derivative. |
| 442 | * <ul> |
| 443 | */ |
| 444 | private static class RunningSignalStats { |
| 445 | Vector3 previousVector; |
| 446 | Vector3 currentVector; |
| 447 | Vector3 runningSum; |
| 448 | float energy; |
| 449 | int sampleCount; |
| 450 | |
| 451 | public RunningSignalStats() { |
| 452 | reset(); |
| 453 | } |
| 454 | |
| 455 | public void reset() { |
| 456 | previousVector = null; |
| 457 | currentVector = null; |
| 458 | runningSum = new Vector3(0, 0, 0, 0); |
| 459 | energy = 0; |
| 460 | sampleCount = 0; |
| 461 | } |
| 462 | |
| 463 | /** |
| 464 | * Apply a 3D vector v as the next element in the running SSE. |
| 465 | */ |
| 466 | public void accumulate(Vector3 v) { |
| 467 | if (v == null) { |
| 468 | if (DEBUG) Slog.i(TAG, "Cannot accumulate a null vector."); |
| 469 | return; |
| 470 | } |
| 471 | sampleCount++; |
| 472 | runningSum = runningSum.plus(v); |
| 473 | previousVector = currentVector; |
| 474 | currentVector = v; |
| 475 | if (previousVector != null) { |
| 476 | Vector3 dv = currentVector.minus(previousVector); |
| 477 | float incrementalEnergy = dv.x * dv.x + dv.y * dv.y + dv.z * dv.z; |
| 478 | energy += incrementalEnergy; |
| 479 | if (DEBUG) Slog.i(TAG, "Accumulated vector " + currentVector.toString() + |
| 480 | ", runningSum = " + runningSum.toString() + |
| 481 | ", incrementalEnergy = " + incrementalEnergy + |
| 482 | ", energy = " + energy); |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | public Vector3 getRunningAverage() { |
| 487 | if (sampleCount > 0) { |
| 488 | return runningSum.times((float)(1.0f / sampleCount)); |
| 489 | } |
| 490 | return null; |
| 491 | } |
| 492 | |
| 493 | public float getEnergy() { |
| 494 | return energy; |
| 495 | } |
| 496 | |
| 497 | public int getSampleCount() { |
| 498 | return sampleCount; |
| 499 | } |
| 500 | |
| 501 | @Override |
| 502 | public String toString() { |
| 503 | String msg = ""; |
| 504 | String currentVectorString = (currentVector == null) ? |
| 505 | "null" : currentVector.toString(); |
| 506 | String previousVectorString = (previousVector == null) ? |
| 507 | "null" : previousVector.toString(); |
| 508 | msg += "previousVector = " + previousVectorString; |
| 509 | msg += ", currentVector = " + currentVectorString; |
| 510 | msg += ", sampleCount = " + sampleCount; |
| 511 | msg += ", energy = " + energy; |
| 512 | return msg; |
| 513 | } |
| 514 | } |
Kevin Gabayan | 5e48844 | 2016-03-24 13:05:23 -0700 | [diff] [blame] | 515 | } |