SystemAudioActionFromTv.java revision 63a2e0696ce2a04fbe0f1f00cfe9c93189f944da 
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.hardware.hdmi.HdmiCec;
20
21
22/**
23 * Feature action that handles System Audio initiated by TV devices.
24 */
25final class SystemAudioActionFromTv extends SystemAudioAction {
26    /**
27     * Constructor
28     *
29     * @param service {@link HdmiControlService} instance
30     * @param tvAddress logical address of TV device
31     * @param avrAddress logical address of AVR device
32     * @param targetStatus Whether to enable the system audio mode or not
33     * @throw IllegalArugmentException if device type of tvAddress is invalid
34     */
35    SystemAudioActionFromTv(HdmiControlService service, int tvAddress, int avrAddress,
36            boolean targetStatus) {
37        super(service, tvAddress, avrAddress, targetStatus);
38        HdmiUtils.verifyAddressType(tvAddress, HdmiCec.DEVICE_TV);
39    }
40
41    @Override
42    boolean start() {
43        // TODO: Check HDMI-CEC is enabled.
44        // TODO: Move to the waiting state if currently a routing change is in progress.
45
46        removeSystemAudioActionInProgress();
47        sendSystemAudioModeRequest();
48        return true;
49    }
50}
51