Move talk/examples/* to webrtc/examples.

talk/examples/android/src/org/appspot/apprtc/AppRTCProximitySensor.java

-/*
- * libjingle
- * Copyright 2014 Google Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *  1. Redistributions of source code must retain the above copyright notice,
- *     this list of conditions and the following disclaimer.
- *  2. Redistributions in binary form must reproduce the above copyright notice,
- *     this list of conditions and the following disclaimer in the documentation
- *     and/or other materials provided with the distribution.
- *  3. The name of the author may not be used to endorse or promote products
- *     derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-package org.appspot.apprtc;
-
-import org.appspot.apprtc.util.AppRTCUtils;
-import org.appspot.apprtc.util.AppRTCUtils.NonThreadSafe;
-
-import android.content.Context;
-import android.hardware.Sensor;
-import android.hardware.SensorEvent;
-import android.hardware.SensorEventListener;
-import android.hardware.SensorManager;
-import android.os.Build;
-import android.util.Log;
-
-/**
- * AppRTCProximitySensor manages functions related to the proximity sensor in
- * the AppRTC demo.
- * On most device, the proximity sensor is implemented as a boolean-sensor.
- * It returns just two values "NEAR" or "FAR". Thresholding is done on the LUX
- * value i.e. the LUX value of the light sensor is compared with a threshold.
- * A LUX-value more than the threshold means the proximity sensor returns "FAR".
- * Anything less than the threshold value and the sensor  returns "NEAR".
- */
-public class AppRTCProximitySensor implements SensorEventListener {
-  private static final String TAG = "AppRTCProximitySensor";
-
-  // This class should be created, started and stopped on one thread
-  // (e.g. the main thread). We use |nonThreadSafe| to ensure that this is
-  // the case. Only active when |DEBUG| is set to true.
-  private final NonThreadSafe nonThreadSafe = new AppRTCUtils.NonThreadSafe();
-
-  private final Runnable onSensorStateListener;
-  private final SensorManager sensorManager;
-  private Sensor proximitySensor = null;
-  private boolean lastStateReportIsNear = false;
-
-  /** Construction */
-  static AppRTCProximitySensor create(Context context,
-      Runnable sensorStateListener) {
-    return new AppRTCProximitySensor(context, sensorStateListener);
-  }
-
-  private AppRTCProximitySensor(Context context, Runnable sensorStateListener) {
-    Log.d(TAG, "AppRTCProximitySensor" + AppRTCUtils.getThreadInfo());
-    onSensorStateListener = sensorStateListener;
-    sensorManager = ((SensorManager) context.getSystemService(
-        Context.SENSOR_SERVICE));
-  }
-
-  /**
-   * Activate the proximity sensor. Also do initializtion if called for the
-   * first time.
-   */
-  public boolean start() {
-    checkIfCalledOnValidThread();
-    Log.d(TAG, "start" + AppRTCUtils.getThreadInfo());
-    if (!initDefaultSensor()) {
-      // Proximity sensor is not supported on this device.
-      return false;
-    }
-    sensorManager.registerListener(
-        this, proximitySensor, SensorManager.SENSOR_DELAY_NORMAL);
-    return true;
-  }
-
-  /** Deactivate the proximity sensor. */
-  public void stop() {
-    checkIfCalledOnValidThread();
-    Log.d(TAG, "stop" + AppRTCUtils.getThreadInfo());
-    if (proximitySensor == null) {
-      return;
-    }
-    sensorManager.unregisterListener(this, proximitySensor);
-  }
-
-  /** Getter for last reported state. Set to true if "near" is reported. */
-  public boolean sensorReportsNearState() {
-    checkIfCalledOnValidThread();
-    return lastStateReportIsNear;
-  }
-
-  @Override
-  public final void onAccuracyChanged(Sensor sensor, int accuracy) {
-    checkIfCalledOnValidThread();
-    AppRTCUtils.assertIsTrue(sensor.getType() == Sensor.TYPE_PROXIMITY);
-    if (accuracy == SensorManager.SENSOR_STATUS_UNRELIABLE) {
-      Log.e(TAG, "The values returned by this sensor cannot be trusted");
-    }
-  }
-
-  @Override
-  public final void onSensorChanged(SensorEvent event) {
-    checkIfCalledOnValidThread();
-    AppRTCUtils.assertIsTrue(event.sensor.getType() == Sensor.TYPE_PROXIMITY);
-    // As a best practice; do as little as possible within this method and
-    // avoid blocking.
-    float distanceInCentimeters = event.values[0];
-    if (distanceInCentimeters < proximitySensor.getMaximumRange()) {
-      Log.d(TAG, "Proximity sensor => NEAR state");
-      lastStateReportIsNear = true;
-    } else {
-      Log.d(TAG, "Proximity sensor => FAR state");
-      lastStateReportIsNear = false;
-    }
-
-    // Report about new state to listening client. Client can then call
-    // sensorReportsNearState() to query the current state (NEAR or FAR).
-    if (onSensorStateListener != null) {
-      onSensorStateListener.run();
-    }
-
-    Log.d(TAG, "onSensorChanged" + AppRTCUtils.getThreadInfo() + ": "
-        + "accuracy=" + event.accuracy
-        + ", timestamp=" + event.timestamp + ", distance=" + event.values[0]);
-  }
-
-  /**
-   * Get default proximity sensor if it exists. Tablet devices (e.g. Nexus 7)
-   * does not support this type of sensor and false will be retured in such
-   * cases.
-   */
-  private boolean initDefaultSensor() {
-    if (proximitySensor != null) {
-      return true;
-    }
-    proximitySensor = sensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);
-    if (proximitySensor == null) {
-      return false;
-    }
-    logProximitySensorInfo();
-    return true;
-  }
-
-  /** Helper method for logging information about the proximity sensor. */
-  private void logProximitySensorInfo() {
-    if (proximitySensor == null) {
-      return;
-    }
-    StringBuilder info = new StringBuilder("Proximity sensor: ");
-    info.append("name=" + proximitySensor.getName());
-    info.append(", vendor: " + proximitySensor.getVendor());
-    info.append(", power: " + proximitySensor.getPower());
-    info.append(", resolution: " + proximitySensor.getResolution());
-    info.append(", max range: " + proximitySensor.getMaximumRange());
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
-      // Added in API level 9.
-      info.append(", min delay: " + proximitySensor.getMinDelay());
-    }
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
-      // Added in API level 20.
-      info.append(", type: " + proximitySensor.getStringType());
-    }
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-      // Added in API level 21.
-      info.append(", max delay: " + proximitySensor.getMaxDelay());
-      info.append(", reporting mode: " + proximitySensor.getReportingMode());
-      info.append(", isWakeUpSensor: " + proximitySensor.isWakeUpSensor());
-    }
-    Log.d(TAG, info.toString());
-  }
-
-  /**
-   * Helper method for debugging purposes. Ensures that method is
-   * called on same thread as this object was created on.
-   */
-  private void checkIfCalledOnValidThread() {
-    if (!nonThreadSafe.calledOnValidThread()) {
-      throw new IllegalStateException("Method is not called on valid thread");
-    }
-  }
-}