1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.google.android.exoplayer2.util; 17 18 /** 19 * Tracks the progression of media time. 20 */ 21 public interface MediaClock { 22 23 /** 24 * Returns the current media position in microseconds. 25 */ getPositionUs()26 long getPositionUs(); 27 28 /** 29 * Attempts to set the playback speed. The media clock may override the speed if changing the 30 * speed is not supported. 31 * 32 * @param playbackSpeed The playback speed to attempt to set. 33 */ setPlaybackSpeed(float playbackSpeed)34 void setPlaybackSpeed(float playbackSpeed); 35 36 /** Returns the active playback speed. */ getPlaybackSpeed()37 float getPlaybackSpeed(); 38 } 39