content: /*
   * 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 com.google.android.exoplayer2.util;
  
  import com.google.android.exoplayer2.PlaybackParameters;
  
  /**
   * Tracks the progression of media time.
   */
  public interface MediaClock {
  
    /**
     * Returns the current media position in microseconds.
     */
    long getPositionUs();
  
    /**
     * Attempts to set the playback parameters and returns the active playback parameters, which may
     * differ from those passed in.
     *
     * @param playbackParameters The playback parameters.
     * @return The active playback parameters.
     */
    PlaybackParameters setPlaybackParameters(PlaybackParameters playbackParameters);
  
    /**
     * Returns the active playback parameters.
     */
    PlaybackParameters getPlaybackParameters();
  
  }
  