SystemAudioAutoInitiationAction.java revision 7fb8e7f4ff524f9131a387efc2649aa78e4ae376 
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 com.android.server.hdmi.HdmiControlService.SendMessageCallback;
20
21/**
22 * Action to initiate system audio once AVR is detected on Device discovery action.
23 */
24// Seq #27
25final class SystemAudioAutoInitiationAction extends HdmiCecFeatureAction {
26    private final int mAvrAddress;
27
28    // State that waits for <System Audio Mode Status> once send
29    // <Give System Audio Mode Status> to AV Receiver.
30    private static final int STATE_WAITING_FOR_SYSTEM_AUDIO_MODE_STATUS = 1;
31
32    SystemAudioAutoInitiationAction(HdmiCecLocalDevice source, int avrAddress) {
33        super(source);
34        mAvrAddress = avrAddress;
35    }
36
37    @Override
38    boolean start() {
39        mState = STATE_WAITING_FOR_SYSTEM_AUDIO_MODE_STATUS;
40
41        addTimer(mState, HdmiConfig.TIMEOUT_MS);
42        sendGiveSystemAudioModeStatus();
43        return true;
44    }
45
46    private void sendGiveSystemAudioModeStatus() {
47        sendCommand(HdmiCecMessageBuilder.buildGiveSystemAudioModeStatus(getSourceAddress(),
48                mAvrAddress), new SendMessageCallback() {
49            @Override
50            public void onSendCompleted(int error) {
51                if (error != Constants.SEND_RESULT_SUCCESS) {
52                    tv().setSystemAudioMode(false, true);
53                    finish();
54                }
55            }
56        });
57    }
58
59    @Override
60    boolean processCommand(HdmiCecMessage cmd) {
61        if (mState != STATE_WAITING_FOR_SYSTEM_AUDIO_MODE_STATUS
62                || mAvrAddress != cmd.getSource()) {
63            return false;
64        }
65
66        if (cmd.getOpcode() == Constants.MESSAGE_SYSTEM_AUDIO_MODE_STATUS) {
67            handleSystemAudioModeStatusMessage();
68            return true;
69        }
70        return false;
71    }
72
73    private void handleSystemAudioModeStatusMessage() {
74        if (!canChangeSystemAudio()) {
75            HdmiLogger.debug("Cannot change system audio mode in auto initiation action.");
76            finish();
77            return;
78        }
79
80        boolean systemAudioModeSetting = tv().getSystemAudioModeSetting();
81        // Update AVR's system audio mode regardless of AVR's status.
82        addAndStartAction(new SystemAudioActionFromTv(tv(), mAvrAddress, systemAudioModeSetting,
83                null));
84        finish();
85    }
86
87    @Override
88    void handleTimerEvent(int state) {
89        if (mState != state) {
90            return;
91        }
92
93        switch (mState) {
94            case STATE_WAITING_FOR_SYSTEM_AUDIO_MODE_STATUS:
95                handleSystemAudioModeStatusTimeout();
96                break;
97        }
98    }
99
100    private void handleSystemAudioModeStatusTimeout() {
101        if (tv().getSystemAudioModeSetting()) {
102            if (canChangeSystemAudio()) {
103                addAndStartAction(new SystemAudioActionFromTv(tv(), mAvrAddress, true, null));
104            }
105        } else {
106            tv().setSystemAudioMode(false, true);
107        }
108        finish();
109    }
110
111    private boolean canChangeSystemAudio() {
112        return !(tv().hasAction(SystemAudioActionFromTv.class)
113               || tv().hasAction(SystemAudioActionFromAvr.class));
114    }
115}
116