1 files changed, 173 insertions, 0 deletions
diff --git a/java/com/android/incallui/InCallCameraManager.java b/java/com/android/incallui/InCallCameraManager.java
new file mode 100644
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+++ b/java/com/android/incallui/InCallCameraManager.java
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+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.incallui;
+
+import android.content.Context;
+import android.hardware.camera2.CameraAccessException;
+import android.hardware.camera2.CameraCharacteristics;
+import android.hardware.camera2.CameraManager;
+import java.util.Collections;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+/** Used to track which camera is used for outgoing video. */
+public class InCallCameraManager {
+
+  private final Set<Listener> mCameraSelectionListeners =
+      Collections.newSetFromMap(new ConcurrentHashMap<Listener, Boolean>(8, 0.9f, 1));
+  /** The camera ID for the front facing camera. */
+  private String mFrontFacingCameraId;
+  /** The camera ID for the rear facing camera. */
+  private String mRearFacingCameraId;
+  /** The currently active camera. */
+  private boolean mUseFrontFacingCamera;
+  /**
+   * Indicates whether the list of cameras has been initialized yet. Initialization is delayed until
+   * a video call is present.
+   */
+  private boolean mIsInitialized = false;
+  /** The context. */
+  private Context mContext;
+
+  /**
+   * Initializes the InCall CameraManager.
+   *
+   * @param context The current context.
+   */
+  public InCallCameraManager(Context context) {
+    mUseFrontFacingCamera = true;
+    mContext = context;
+  }
+
+  /**
+   * Sets whether the front facing camera should be used or not.
+   *
+   * @param useFrontFacingCamera {@code True} if the front facing camera is to be used.
+   */
+  public void setUseFrontFacingCamera(boolean useFrontFacingCamera) {
+    mUseFrontFacingCamera = useFrontFacingCamera;
+    for (Listener listener : mCameraSelectionListeners) {
+      listener.onActiveCameraSelectionChanged(mUseFrontFacingCamera);
+    }
+  }
+
+  /**
+   * Determines whether the front facing camera is currently in use.
+   *
+   * @return {@code True} if the front facing camera is in use.
+   */
+  public boolean isUsingFrontFacingCamera() {
+    return mUseFrontFacingCamera;
+  }
+
+  /**
+   * Determines the active camera ID.
+   *
+   * @return The active camera ID.
+   */
+  public String getActiveCameraId() {
+    maybeInitializeCameraList(mContext);
+
+    if (mUseFrontFacingCamera) {
+      return mFrontFacingCameraId;
+    } else {
+      return mRearFacingCameraId;
+    }
+  }
+
+  /** Calls when camera permission is granted by user. */
+  public void onCameraPermissionGranted() {
+    for (Listener listener : mCameraSelectionListeners) {
+      listener.onCameraPermissionGranted();
+    }
+  }
+
+  /**
+   * Get the list of cameras available for use.
+   *
+   * @param context The context.
+   */
+  private void maybeInitializeCameraList(Context context) {
+    if (mIsInitialized || context == null) {
+      return;
+    }
+
+    Log.v(this, "initializeCameraList");
+
+    CameraManager cameraManager = null;
+    try {
+      cameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
+    } catch (Exception e) {
+      Log.e(this, "Could not get camera service.");
+      return;
+    }
+
+    if (cameraManager == null) {
+      return;
+    }
+
+    String[] cameraIds = {};
+    try {
+      cameraIds = cameraManager.getCameraIdList();
+    } catch (CameraAccessException e) {
+      Log.d(this, "Could not access camera: " + e);
+      // Camera disabled by device policy.
+      return;
+    }
+
+    for (int i = 0; i < cameraIds.length; i++) {
+      CameraCharacteristics c = null;
+      try {
+        c = cameraManager.getCameraCharacteristics(cameraIds[i]);
+      } catch (IllegalArgumentException e) {
+        // Device Id is unknown.
+      } catch (CameraAccessException e) {
+        // Camera disabled by device policy.
+      }
+      if (c != null) {
+        int facingCharacteristic = c.get(CameraCharacteristics.LENS_FACING);
+        if (facingCharacteristic == CameraCharacteristics.LENS_FACING_FRONT) {
+          mFrontFacingCameraId = cameraIds[i];
+        } else if (facingCharacteristic == CameraCharacteristics.LENS_FACING_BACK) {
+          mRearFacingCameraId = cameraIds[i];
+        }
+      }
+    }
+
+    mIsInitialized = true;
+    Log.v(this, "initializeCameraList : done");
+  }
+
+  public void addCameraSelectionListener(Listener listener) {
+    if (listener != null) {
+      mCameraSelectionListeners.add(listener);
+    }
+  }
+
+  public void removeCameraSelectionListener(Listener listener) {
+    if (listener != null) {
+      mCameraSelectionListeners.remove(listener);
+    }
+  }
+
+  public interface Listener {
+
+    void onActiveCameraSelectionChanged(boolean isUsingFrontFacingCamera);
+
+    void onCameraPermissionGranted();
+  }
+}