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      1 /*
      2  * Copyright (C) 2013 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.example.android.mediarouter.player;
     18 
     19 import android.content.Context;
     20 import android.support.v7.media.MediaControlIntent;
     21 import android.support.v7.media.MediaRouter.RouteInfo;
     22 
     23 /**
     24  * Abstraction of common playback operations of media items, such as play,
     25  * seek, etc. Used by PlaybackManager as a backend to handle actual playback
     26  * of media items.
     27  */
     28 public abstract class Player {
     29     protected Callback mCallback;
     30 
     31     public abstract boolean isRemotePlayback();
     32     public abstract boolean isQueuingSupported();
     33 
     34     public abstract void connect(RouteInfo route);
     35     public abstract void release();
     36 
     37     // basic operations that are always supported
     38     public abstract void play(final PlaylistItem item);
     39     public abstract void seek(final PlaylistItem item);
     40     public abstract void getStatus(final PlaylistItem item, final boolean update);
     41     public abstract void pause();
     42     public abstract void resume();
     43     public abstract void stop();
     44 
     45     // advanced queuing (enqueue & remove) are only supported
     46     // if isQueuingSupported() returns true
     47     public abstract void enqueue(final PlaylistItem item);
     48     public abstract PlaylistItem remove(String iid);
     49 
     50     // route statistics
     51     public void updateStatistics() {}
     52     public String getStatistics() { return ""; }
     53 
     54     // presentation display
     55     public void updatePresentation() {}
     56 
     57     public void setCallback(Callback callback) {
     58         mCallback = callback;
     59     }
     60 
     61     public static Player create(Context context, RouteInfo route) {
     62         Player player;
     63         if (route != null && route.supportsControlCategory(
     64                 MediaControlIntent.CATEGORY_REMOTE_PLAYBACK)) {
     65             player = new RemotePlayer(context);
     66         } else if (route != null) {
     67             player = new LocalPlayer.SurfaceViewPlayer(context);
     68         } else {
     69             player = new LocalPlayer.OverlayPlayer(context);
     70         }
     71         player.connect(route);
     72         return player;
     73     }
     74 
     75     public interface Callback {
     76         void onError();
     77         void onCompletion();
     78         void onPlaylistChanged();
     79         void onPlaylistReady();
     80     }
     81 }
     82