1/*
2 * Copyright (C) 2014 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 */
16package android.support.v4.media.session;
17
18import android.app.PendingIntent;
19import android.content.Context;
20import android.media.AudioManager;
21import android.media.RemoteControlClient;
22import android.os.SystemClock;
23
24public class MediaSessionCompatApi18 {
25
26    public static Object createPlaybackPositionUpdateListener(
27            MediaSessionCompatApi14.Callback callback) {
28        return new OnPlaybackPositionUpdateListener<MediaSessionCompatApi14.Callback>(callback);
29    }
30
31    public static void registerMediaButtonEventReceiver(Context context, PendingIntent pi) {
32        AudioManager am = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
33        am.registerMediaButtonEventReceiver(pi);
34    }
35
36    public static void unregisterMediaButtonEventReceiver(Context context, PendingIntent pi) {
37        AudioManager am = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
38        am.unregisterMediaButtonEventReceiver(pi);
39    }
40
41    public static void setState(Object rccObj, int state, long position, float speed,
42            long updateTime) {
43        long currTime = SystemClock.elapsedRealtime();
44        if (state == MediaSessionCompatApi14.STATE_PLAYING && position > 0) {
45            long diff = 0;
46            if (updateTime > 0) {
47                diff = currTime - updateTime;
48                if (speed > 0 && speed != 1f) {
49                    diff *= speed;
50                }
51            }
52            position += diff;
53        }
54        state = MediaSessionCompatApi14.getRccStateFromState(state);
55        ((RemoteControlClient) rccObj).setPlaybackState(state, position, speed);
56    }
57
58    public static void setOnPlaybackPositionUpdateListener(Object rccObj,
59            Object onPositionUpdateObj) {
60        ((RemoteControlClient) rccObj).setPlaybackPositionUpdateListener(
61                (RemoteControlClient.OnPlaybackPositionUpdateListener) onPositionUpdateObj);
62    }
63
64    static class OnPlaybackPositionUpdateListener<T extends MediaSessionCompatApi14.Callback>
65            implements RemoteControlClient.OnPlaybackPositionUpdateListener {
66        protected final T mCallback;
67
68        public OnPlaybackPositionUpdateListener(T callback) {
69            mCallback = callback;
70        }
71
72        @Override
73        public void onPlaybackPositionUpdate(long newPositionMs) {
74            mCallback.onSeekTo(newPositionMs);
75        }
76    }
77}