SystemAudioActionFromTv.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.hardware.hdmi.HdmiCecDeviceInfo;
20import android.hardware.hdmi.IHdmiControlCallback;
21
22
23/**
24 * Feature action that handles System Audio initiated by TV devices.
25 */
26final class SystemAudioActionFromTv extends SystemAudioAction {
27    /**
28     * Constructor
29     *
30     * @param sourceAddress {@link HdmiCecLocalDevice} instance
31     * @param avrAddress logical address of AVR device
32     * @param targetStatus Whether to enable the system audio mode or not
33     * @param callback callback interface to be notified when it's done
34     * @throw IllegalArugmentException if device type of tvAddress is invalid
35     */
36    SystemAudioActionFromTv(HdmiCecLocalDevice sourceAddress, int avrAddress,
37            boolean targetStatus, IHdmiControlCallback callback) {
38        super(sourceAddress, avrAddress, targetStatus, callback);
39        HdmiUtils.verifyAddressType(getSourceAddress(), HdmiCecDeviceInfo.DEVICE_TV);
40    }
41
42    @Override
43    boolean start() {
44        // TODO: Check HDMI-CEC is enabled.
45        // TODO: Move to the waiting state if currently a routing change is in progress.
46
47        removeSystemAudioActionInProgress();
48        sendSystemAudioModeRequest();
49        return true;
50    }
51}
52