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/*
 * Copyright (C) 2016 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 org.mozilla.thirdparty.com.google.android.exoplayer2;

import java.util.HashSet;

/**
 * Information about the ExoPlayer library.
 */
public final class ExoPlayerLibraryInfo {

  /**
   * A tag to use when logging library information.
   */
  public static final String TAG = "ExoPlayer";

  /** The version of the library expressed as a string, for example "1.2.3". */
  // Intentionally hardcoded. Do not derive from other constants (e.g. VERSION_INT) or vice versa.
  public static final String VERSION = "2.11.4";

  /** The version of the library expressed as {@code "ExoPlayerLib/" + VERSION}. */
  // Intentionally hardcoded. Do not derive from other constants (e.g. VERSION) or vice versa.
  public static final String VERSION_SLASHY = "ExoPlayerLib/2.11.4";

  /**
   * The version of the library expressed as an integer, for example 1002003.
   *
   * <p>Three digits are used for each component of {@link #VERSION}. For example "1.2.3" has the
   * corresponding integer version 1002003 (001-002-003), and "123.45.6" has the corresponding
   * integer version 123045006 (123-045-006).
   */
  // Intentionally hardcoded. Do not derive from other constants (e.g. VERSION) or vice versa.
  public static final int VERSION_INT = 2011004;

  /**
   * Whether the library was compiled with {@link org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions}
   * checks enabled.
   */
  public static final boolean ASSERTIONS_ENABLED = true;

  /** Whether an exception should be thrown in case of an OpenGl error. */
  public static final boolean GL_ASSERTIONS_ENABLED = false;

  /**
   * Whether the library was compiled with {@link org.mozilla.thirdparty.com.google.android.exoplayer2.util.TraceUtil}
   * trace enabled.
   */
  public static final boolean TRACE_ENABLED = true;

  private static final HashSet<String> registeredModules = new HashSet<>();
  private static String registeredModulesString = "goog.exo.core";

  private ExoPlayerLibraryInfo() {} // Prevents instantiation.

  /**
   * Returns a string consisting of registered module names separated by ", ".
   */
  public static synchronized String registeredModules() {
    return registeredModulesString;
  }

  /**
   * Registers a module to be returned in the {@link #registeredModules()} string.
   *
   * @param name The name of the module being registered.
   */
  public static synchronized void registerModule(String name) {
    if (registeredModules.add(name)) {
      registeredModulesString = registeredModulesString + ", " + name;
    }
  }

}