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 17 package com.android.tv.dvr; 18 19 import android.content.Context; 20 import android.content.SharedPreferences; 21 import android.media.tv.TvInputManager; 22 import android.support.annotation.IntDef; 23 import com.android.tv.common.util.SharedPreferencesUtils; 24 import com.android.tv.dvr.data.RecordedProgram; 25 import java.lang.annotation.Retention; 26 import java.lang.annotation.RetentionPolicy; 27 import java.util.ArrayList; 28 import java.util.HashMap; 29 import java.util.Map; 30 import java.util.Set; 31 import java.util.concurrent.CopyOnWriteArraySet; 32 33 /** 34 * A class to manage DVR watched state. It will remember and provides previous watched position of 35 * DVR playback. 36 */ 37 public class DvrWatchedPositionManager { 38 private SharedPreferences mWatchedPositions; 39 private final Map<Long, Set> mListeners = new HashMap<>(); 40 41 /** 42 * The minimum percentage of recorded program being watched that will be considered as being 43 * completely watched. 44 */ 45 public static final float DVR_WATCHED_THRESHOLD_RATE = 0.98f; 46 47 @Retention(RetentionPolicy.SOURCE) 48 @IntDef({DVR_WATCHED_STATUS_NEW, DVR_WATCHED_STATUS_WATCHING, DVR_WATCHED_STATUS_WATCHED}) 49 public @interface DvrWatchedStatus {} 50 /** The status indicates the recorded program has not been watched at all. */ 51 public static final int DVR_WATCHED_STATUS_NEW = 0; 52 /** The status indicates the recorded program is being watched. */ 53 public static final int DVR_WATCHED_STATUS_WATCHING = 1; 54 /** The status indicates the recorded program was completely watched. */ 55 public static final int DVR_WATCHED_STATUS_WATCHED = 2; 56 DvrWatchedPositionManager(Context context)57 public DvrWatchedPositionManager(Context context) { 58 mWatchedPositions = 59 context.getSharedPreferences( 60 SharedPreferencesUtils.SHARED_PREF_DVR_WATCHED_POSITION, 61 Context.MODE_PRIVATE); 62 } 63 64 /** Sets the watched position of the give program. */ setWatchedPosition(long recordedProgramId, long positionMs)65 public void setWatchedPosition(long recordedProgramId, long positionMs) { 66 mWatchedPositions.edit().putLong(Long.toString(recordedProgramId), positionMs).apply(); 67 notifyWatchedPositionChanged(recordedProgramId, positionMs); 68 } 69 70 /** Gets the watched position of the give program. */ getWatchedPosition(long recordedProgramId)71 public long getWatchedPosition(long recordedProgramId) { 72 return mWatchedPositions.getLong( 73 Long.toString(recordedProgramId), TvInputManager.TIME_SHIFT_INVALID_TIME); 74 } 75 76 @DvrWatchedStatus getWatchedStatus(RecordedProgram recordedProgram)77 public int getWatchedStatus(RecordedProgram recordedProgram) { 78 long watchedPosition = getWatchedPosition(recordedProgram.getId()); 79 if (watchedPosition == TvInputManager.TIME_SHIFT_INVALID_TIME) { 80 return DVR_WATCHED_STATUS_NEW; 81 } else if (watchedPosition 82 > recordedProgram.getDurationMillis() * DVR_WATCHED_THRESHOLD_RATE) { 83 return DVR_WATCHED_STATUS_WATCHED; 84 } else { 85 return DVR_WATCHED_STATUS_WATCHING; 86 } 87 } 88 89 /** Adds {@link WatchedPositionChangedListener}. */ addListener(WatchedPositionChangedListener listener, long recordedProgramId)90 public void addListener(WatchedPositionChangedListener listener, long recordedProgramId) { 91 if (recordedProgramId == RecordedProgram.ID_NOT_SET) { 92 return; 93 } 94 Set<WatchedPositionChangedListener> listenerSet = mListeners.get(recordedProgramId); 95 if (listenerSet == null) { 96 listenerSet = new CopyOnWriteArraySet<>(); 97 mListeners.put(recordedProgramId, listenerSet); 98 } 99 listenerSet.add(listener); 100 } 101 102 /** Removes {@link WatchedPositionChangedListener}. */ removeListener(WatchedPositionChangedListener listener)103 public void removeListener(WatchedPositionChangedListener listener) { 104 for (long recordedProgramId : new ArrayList<>(mListeners.keySet())) { 105 removeListener(listener, recordedProgramId); 106 } 107 } 108 109 /** Removes {@link WatchedPositionChangedListener}. */ removeListener(WatchedPositionChangedListener listener, long recordedProgramId)110 public void removeListener(WatchedPositionChangedListener listener, long recordedProgramId) { 111 Set<WatchedPositionChangedListener> listenerSet = mListeners.get(recordedProgramId); 112 if (listenerSet == null) { 113 return; 114 } 115 listenerSet.remove(listener); 116 if (listenerSet.isEmpty()) { 117 mListeners.remove(recordedProgramId); 118 } 119 } 120 notifyWatchedPositionChanged(long recordedProgramId, long positionMs)121 private void notifyWatchedPositionChanged(long recordedProgramId, long positionMs) { 122 Set<WatchedPositionChangedListener> listenerSet = mListeners.get(recordedProgramId); 123 if (listenerSet == null) { 124 return; 125 } 126 for (WatchedPositionChangedListener listener : listenerSet) { 127 listener.onWatchedPositionChanged(recordedProgramId, positionMs); 128 } 129 } 130 131 public interface WatchedPositionChangedListener { 132 /** Called when the watched position of some program is changed. */ onWatchedPositionChanged(long recordedProgramId, long positionMs)133 void onWatchedPositionChanged(long recordedProgramId, long positionMs); 134 } 135 } 136