content: /*
   * Copyright (C) 2020 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.google.android.exoplayer2;
  
  import android.content.Context;
  import android.net.wifi.WifiManager;
  import android.net.wifi.WifiManager.WifiLock;
  import androidx.annotation.Nullable;
  import com.google.android.exoplayer2.util.Log;
  
  /**
   * Handles a {@link WifiLock}
   *
   * <p>The handling of wifi locks requires the {@link android.Manifest.permission#WAKE_LOCK}
   * permission.
   */
  /* package */ final class WifiLockManager {
  
    private static final String TAG = "WifiLockManager";
    private static final String WIFI_LOCK_TAG = "ExoPlayer:WifiLockManager";
  
    @Nullable private final WifiManager wifiManager;
    @Nullable private WifiLock wifiLock;
    private boolean enabled;
    private boolean stayAwake;
  
    public WifiLockManager(Context context) {
      wifiManager =
          (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
    }
  
    /**
     * Sets whether to enable the usage of a {@link WifiLock}.
     *
     * <p>By default, wifi lock handling is not enabled. Enabling will acquire the wifi lock if
     * necessary. Disabling will release the wifi lock if held.
     *
     * <p>Enabling {@link WifiLock} requires the {@link android.Manifest.permission#WAKE_LOCK}.
     *
     * @param enabled True if the player should handle a {@link WifiLock}.
     */
    public void setEnabled(boolean enabled) {
      if (enabled && wifiLock == null) {
        if (wifiManager == null) {
          Log.w(TAG, "WifiManager is null, therefore not creating the WifiLock.");
          return;
        }
        wifiLock = wifiManager.createWifiLock(WifiManager.WIFI_MODE_FULL_HIGH_PERF, WIFI_LOCK_TAG);
        wifiLock.setReferenceCounted(false);
      }
  
      this.enabled = enabled;
      updateWifiLock();
    }
  
    /**
     * Sets whether to acquire or release the {@link WifiLock}.
     *
     * <p>The wifi lock will not be acquired unless handling has been enabled through {@link
     * #setEnabled(boolean)}.
     *
     * @param stayAwake True if the player should acquire the {@link WifiLock}. False if it should
     *     release.
     */
    public void setStayAwake(boolean stayAwake) {
      this.stayAwake = stayAwake;
      updateWifiLock();
    }
  
    private void updateWifiLock() {
      if (wifiLock == null) {
        return;
      }
  
      if (enabled && stayAwake) {
        wifiLock.acquire();
      } else {
        wifiLock.release();
      }
    }
  }
  