1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server.hdmi;
import android.hardware.hdmi.HdmiDeviceInfo;
import android.util.Slog;
/**
* Feature action that handles enabling/disabling of ARC transmission channel.
* Once TV gets <Initiate ARC>, TV sends <Report ARC Initiated> to AV Receiver.
* If it fails or it gets <Terminate ARC>, TV just disables ARC.
*/
final class SetArcTransmissionStateAction extends HdmiCecFeatureAction {
private static final String TAG = "SetArcTransmissionStateAction";
// State in which the action sent <Rerpot Arc Initiated> and
// is waiting for time out. If it receives <Feature Abort> within timeout
// ARC should be disabled.
private static final int STATE_WAITING_TIMEOUT = 1;
private final boolean mEnabled;
private final int mAvrAddress;
/**
* @Constructor
*
* @param source {@link HdmiCecLocalDevice} instance
* @param enabled whether to enable ARC Transmission channel
*/
SetArcTransmissionStateAction(HdmiCecLocalDevice source, int avrAddress,
boolean enabled) {
super(source);
HdmiUtils.verifyAddressType(getSourceAddress(), HdmiDeviceInfo.DEVICE_TV);
HdmiUtils.verifyAddressType(avrAddress, HdmiDeviceInfo.DEVICE_AUDIO_SYSTEM);
mAvrAddress = avrAddress;
mEnabled = enabled;
}
@Override
boolean start() {
if (mEnabled) {
// Enable ARC status immediately after sending <Report Arc Initiated>.
// If AVR responds with <Feature Abort>, disable ARC status again.
// This is different from spec that says that turns ARC status to
// "Enabled" if <Report ARC Initiated> is acknowledged and no
// <Feature Abort> is received.
// But implemented this way to save the time having to wait for
// <Feature Abort>.
setArcStatus(true);
// If succeeds to send <Report ARC Initiated>, wait general timeout
// to check whether there is no <Feature Abort> for <Report ARC Initiated>.
mState = STATE_WAITING_TIMEOUT;
addTimer(mState, HdmiConfig.TIMEOUT_MS);
sendReportArcInitiated();
} else {
setArcStatus(false);
finish();
}
return true;
}
private void sendReportArcInitiated() {
HdmiCecMessage command =
HdmiCecMessageBuilder.buildReportArcInitiated(getSourceAddress(), mAvrAddress);
sendCommand(command, new HdmiControlService.SendMessageCallback() {
@Override
public void onSendCompleted(int error) {
if (error != Constants.SEND_RESULT_SUCCESS) {
// If fails to send <Report ARC Initiated>, disable ARC and
// send <Report ARC Terminated> directly.
setArcStatus(false);
HdmiLogger.debug("Failed to send <Report Arc Initiated>.");
finish();
}
}
});
}
private void setArcStatus(boolean enabled) {
boolean wasEnabled = tv().setArcStatus(enabled);
Slog.i(TAG, "Change arc status [old:" + wasEnabled + ", new:" + enabled + "]");
// If enabled before and set to "disabled" and send <Report Arc Terminated> to
// av reciever.
if (!enabled && wasEnabled) {
sendCommand(HdmiCecMessageBuilder.buildReportArcTerminated(getSourceAddress(),
mAvrAddress));
}
}
@Override
boolean processCommand(HdmiCecMessage cmd) {
if (mState != STATE_WAITING_TIMEOUT) {
return false;
}
int opcode = cmd.getOpcode();
if (opcode == Constants.MESSAGE_FEATURE_ABORT) {
int originalOpcode = cmd.getParams()[0] & 0xFF;
if (originalOpcode == Constants.MESSAGE_REPORT_ARC_INITIATED) {
HdmiLogger.debug("Feature aborted for <Report Arc Initiated>");
setArcStatus(false);
finish();
return true;
}
}
return false;
}
@Override
void handleTimerEvent(int state) {
if (mState != state || mState != STATE_WAITING_TIMEOUT) {
return;
}
// Expire timeout for <Feature Abort>.
finish();
}
}
|
