SystemAudioStatusAction.java revision 187d01765b935d07936f74343b4f4af590c239a1 
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;
20import android.hardware.hdmi.HdmiCecMessage;
21import android.util.Slog;
22
23import com.android.server.hdmi.HdmiControlService.SendMessageCallback;
24
25/**
26 * Action to update audio status (volume or mute) of audio amplifier
27 */
28// TODO: refactor SystemAudioMode so that it uses this class instead of internal state.
29final class SystemAudioStatusAction extends FeatureAction {
30    private static final String TAG = "SystemAudioStatusAction";
31
32    // State that waits for <ReportAudioStatus>.
33    private static final int STATE_WAIT_FOR_REPORT_AUDIO_STATUS = 1;
34
35    private final int mAvrAddress;
36
37    SystemAudioStatusAction(HdmiCecLocalDevice source, int avrAddress) {
38        super(source);
39        mAvrAddress = avrAddress;
40    }
41
42    @Override
43    boolean start() {
44        mState = STATE_WAIT_FOR_REPORT_AUDIO_STATUS;
45        addTimer(mState, TIMEOUT_MS);
46        sendGiveAudioStatus();
47        return true;
48    }
49
50    private void sendGiveAudioStatus() {
51        sendCommand(HdmiCecMessageBuilder.buildGiveAudioStatus(getSourceAddress(), mAvrAddress),
52                new SendMessageCallback() {
53            @Override
54            public void onSendCompleted(int error) {
55                if (error != HdmiConstants.SEND_RESULT_SUCCESS) {
56                    handleSendGiveAudioStatusFailure();
57                }
58            }
59        });
60    }
61
62    private void handleSendGiveAudioStatusFailure() {
63        // Inform to all application that the audio status (volumn, mute) of
64        // the audio amplifier is unknown.
65        tv().setAudioStatus(false, HdmiConstants.UNKNOWN_VOLUME);
66
67        int uiCommand = tv().getSystemAudioMode()
68                ? HdmiConstants.UI_COMMAND_RESTORE_VOLUME_FUNCTION  // SystemAudioMode: ON
69                : HdmiConstants.UI_COMMAND_MUTE_FUNCTION;           // SystemAudioMode: OFF
70        sendUserControlPressedAndReleased(uiCommand);
71        finish();
72    }
73
74    private void sendUserControlPressedAndReleased(int uiCommand) {
75        sendCommand(HdmiCecMessageBuilder.buildUserControlPressed(
76                getSourceAddress(), mAvrAddress, uiCommand));
77        sendCommand(HdmiCecMessageBuilder.buildUserControlReleased(
78                getSourceAddress(), mAvrAddress));
79    }
80
81    @Override
82    boolean processCommand(HdmiCecMessage cmd) {
83        if (mState != STATE_WAIT_FOR_REPORT_AUDIO_STATUS) {
84            return false;
85        }
86
87        switch (cmd.getOpcode()) {
88            case HdmiCec.MESSAGE_REPORT_AUDIO_STATUS:
89                handleReportAudioStatus(cmd);
90                return true;
91        }
92
93        return false;
94    }
95
96    private void handleReportAudioStatus(HdmiCecMessage cmd) {
97        byte[] params = cmd.getParams();
98        if (params.length > 0) {
99            boolean mute = (params[0] & 0x80) == 0x80;
100            int volume = params[0] & 0x7F;
101            tv().setAudioStatus(mute, volume);
102
103            if ((tv().getSystemAudioMode() && mute) || (!tv().getSystemAudioMode() && !mute)) {
104                // Toggle AVR's mute status to match with the system audio status.
105                sendUserControlPressedAndReleased(HdmiConstants.UI_COMMAND_MUTE);
106            }
107            finish();
108        } else {
109            Slog.e(TAG, "Invalid <Report Audio Status> message:" + cmd);
110            handleSendGiveAudioStatusFailure();
111            return;
112        }
113    }
114
115    @Override
116    void handleTimerEvent(int state) {
117        if (mState != state) {
118            return;
119        }
120
121        handleSendGiveAudioStatusFailure();
122    }
123}
124