SystemAudioActionFromTv.java revision 79c58a4b97f27ede6a1b680d2fece9c2a0edf7b7 
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 sourceAddress {@link HdmiCecLocalDevice} instance
30     * @param avrAddress logical address of AVR device
31     * @param targetStatus Whether to enable the system audio mode or not
32     * @throw IllegalArugmentException if device type of tvAddress is invalid
33     */
34    SystemAudioActionFromTv(HdmiCecLocalDevice sourceAddress, int avrAddress,
35            boolean targetStatus) {
36        super(sourceAddress, avrAddress, targetStatus);
37        HdmiUtils.verifyAddressType(getSourceAddress(), HdmiCec.DEVICE_TV);
38    }
39
40    @Override
41    boolean start() {
42        // TODO: Check HDMI-CEC is enabled.
43        // TODO: Move to the waiting state if currently a routing change is in progress.
44
45        removeSystemAudioActionInProgress();
46        sendSystemAudioModeRequest();
47        return true;
48    }
49}
50