ActiveSourceHandler.java revision c0c20d0522d7756d80f011e7a54bf3b51c78df41 
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 */
16
17package com.android.server.hdmi;
18
19import android.annotation.Nullable;
20import android.hardware.hdmi.IHdmiControlCallback;
21import android.hardware.hdmi.HdmiCecDeviceInfo;
22import android.hardware.hdmi.HdmiControlManager;
23import android.os.RemoteException;
24import android.util.Slog;
25
26/**
27 * Handles CEC command <Active Source>.
28 * <p>
29 * Used by feature actions that need to handle the command in their flow. Only for TV
30 * local device.
31 */
32final class ActiveSourceHandler {
33    private static final String TAG = "ActiveSourceHandler";
34
35    private final HdmiCecLocalDeviceTv mSource;
36    private final HdmiControlService mService;
37    @Nullable
38    private final IHdmiControlCallback mCallback;
39
40    static ActiveSourceHandler create(HdmiCecLocalDeviceTv source, IHdmiControlCallback callback) {
41        if (source == null) {
42            Slog.e(TAG, "Wrong arguments");
43            return null;
44        }
45        return new ActiveSourceHandler(source, callback);
46    }
47
48    private ActiveSourceHandler(HdmiCecLocalDeviceTv source, IHdmiControlCallback callback) {
49        mSource = source;
50        mService = mSource.getService();
51        mCallback = callback;
52    }
53
54    /**
55     * Handles the incoming active source command.
56     *
57     * @param activeAddress logical address of the device to be the active source
58     * @param activePath routing path of the device to be the active source
59     */
60    void process(int activeAddress, int activePath) {
61        // Seq #17
62        HdmiCecLocalDeviceTv tv = mSource;
63        if (getSourcePath() == activePath && tv.getActiveSource() == getSourceAddress()) {
64            invokeCallback(HdmiControlManager.RESULT_SUCCESS);
65            return;
66        }
67        HdmiCecDeviceInfo device = mService.getDeviceInfo(activeAddress);
68        if (device == null) {
69            tv.addAndStartAction(new NewDeviceAction(tv, activeAddress, activePath));
70        }
71
72        int currentActive = tv.getActiveSource();
73        int currentPath = tv.getActivePath();
74        if (!tv.isProhibitMode()) {
75            tv.updateActiveSource(activeAddress, activePath);
76            if (currentActive != activeAddress && currentPath != activePath) {
77                tv.updateActivePortId(mService.pathToPortId(activePath));
78            }
79            invokeCallback(HdmiControlManager.RESULT_SUCCESS);
80        } else {
81            // TV is in a mode that should keep its current source/input from
82            // being changed for its operation. Reclaim the active source
83            // or switch the port back to the one used for the current mode.
84            if (currentActive == getSourceAddress()) {
85                HdmiCecMessage activeSource =
86                        HdmiCecMessageBuilder.buildActiveSource(currentActive, currentPath);
87                mService.sendCecCommand(activeSource);
88                tv.updateActiveSource(currentActive, currentPath);
89                invokeCallback(HdmiControlManager.RESULT_SUCCESS);
90            } else {
91                HdmiCecMessage routingChange = HdmiCecMessageBuilder.buildRoutingChange(
92                        getSourceAddress(), activePath, currentPath);
93                mService.sendCecCommand(routingChange);
94                tv.addAndStartAction(new RoutingControlAction(tv, currentPath, true, mCallback));
95            }
96        }
97    }
98
99    private final int getSourceAddress() {
100        return mSource.getDeviceInfo().getLogicalAddress();
101    }
102
103    private final int getSourcePath() {
104        return mSource.getDeviceInfo().getPhysicalAddress();
105    }
106
107    private void invokeCallback(int result) {
108        if (mCallback == null) {
109            return;
110        }
111        try {
112            mCallback.onComplete(result);
113        } catch (RemoteException e) {
114            Slog.e(TAG, "Callback failed:" + e);
115        }
116    }
117}
118