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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* 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.hardware.hdmi.HdmiControlManager;
import android.hardware.hdmi.HdmiTvClient;
import android.hardware.hdmi.IHdmiControlCallback;
import android.os.RemoteException;
import android.util.Slog;
import com.android.server.hdmi.HdmiControlService.SendMessageCallback;
/**
* Handles an action that selects a logical device as a new active source.
*
* Triggered by {@link HdmiTvClient}, attempts to select the given target device
* for a new active source. It does its best to wake up the target in standby mode
* before issuing the command >Set Stream path<.
*/
final class DeviceSelectAction extends HdmiCecFeatureAction {
private static final String TAG = "DeviceSelect";
// Time in milliseconds we wait for the device power status to switch to 'Standby'
private static final int TIMEOUT_TRANSIT_TO_STANDBY_MS = 5 * 1000;
// Time in milliseconds we wait for the device power status to turn to 'On'.
private static final int TIMEOUT_POWER_ON_MS = 5 * 1000;
// The number of times we try to wake up the target device before we give up
// and just send <Set Stream Path>.
private static final int LOOP_COUNTER_MAX = 20;
// State in which we wait for <Report Power Status> to come in response to the command
// <Give Device Power Status> we have sent.
private static final int STATE_WAIT_FOR_REPORT_POWER_STATUS = 1;
// State in which we wait for the device power status to switch to 'Standby'.
// We wait till the status becomes 'Standby' before we send <Set Stream Path>
// to wake up the device again.
private static final int STATE_WAIT_FOR_DEVICE_TO_TRANSIT_TO_STANDBY = 2;
// State in which we wait for the device power status to switch to 'on'. We wait
// maximum 100 seconds (20 * 5) before we give up and just send <Set Stream Path>.
private static final int STATE_WAIT_FOR_DEVICE_POWER_ON = 3;
private final HdmiDeviceInfo mTarget;
private final IHdmiControlCallback mCallback;
private final HdmiCecMessage mGivePowerStatus;
private int mPowerStatusCounter = 0;
/**
* Constructor.
*
* @param source {@link HdmiCecLocalDevice} instance
* @param target target logical device that will be a new active source
* @param callback callback object
*/
public DeviceSelectAction(HdmiCecLocalDeviceTv source,
HdmiDeviceInfo target, IHdmiControlCallback callback) {
super(source);
mCallback = callback;
mTarget = target;
mGivePowerStatus = HdmiCecMessageBuilder.buildGiveDevicePowerStatus(
getSourceAddress(), getTargetAddress());
}
int getTargetAddress() {
return mTarget.getLogicalAddress();
}
@Override
public boolean start() {
// Seq #9
queryDevicePowerStatus();
return true;
}
private void queryDevicePowerStatus() {
sendCommand(mGivePowerStatus, new SendMessageCallback() {
@Override
public void onSendCompleted(int error) {
if (error == Constants.SEND_RESULT_NAK) {
invokeCallback(HdmiControlManager.RESULT_COMMUNICATION_FAILED);
finish();
return;
}
}
});
mState = STATE_WAIT_FOR_REPORT_POWER_STATUS;
addTimer(mState, HdmiConfig.TIMEOUT_MS);
}
@Override
public boolean processCommand(HdmiCecMessage cmd) {
if (cmd.getSource() != getTargetAddress()) {
return false;
}
int opcode = cmd.getOpcode();
byte[] params = cmd.getParams();
switch (mState) {
case STATE_WAIT_FOR_REPORT_POWER_STATUS:
if (opcode == Constants.MESSAGE_REPORT_POWER_STATUS) {
return handleReportPowerStatus(params[0]);
}
return false;
default:
break;
}
return false;
}
private boolean handleReportPowerStatus(int powerStatus) {
switch (powerStatus) {
case HdmiControlManager.POWER_STATUS_ON:
sendSetStreamPath();
return true;
case HdmiControlManager.POWER_STATUS_TRANSIENT_TO_STANDBY:
if (mPowerStatusCounter < 4) {
mState = STATE_WAIT_FOR_DEVICE_TO_TRANSIT_TO_STANDBY;
addTimer(mState, TIMEOUT_TRANSIT_TO_STANDBY_MS);
} else {
sendSetStreamPath();
}
return true;
case HdmiControlManager.POWER_STATUS_STANDBY:
if (mPowerStatusCounter == 0) {
turnOnDevice();
} else {
sendSetStreamPath();
}
return true;
case HdmiControlManager.POWER_STATUS_TRANSIENT_TO_ON:
if (mPowerStatusCounter < LOOP_COUNTER_MAX) {
mState = STATE_WAIT_FOR_DEVICE_POWER_ON;
addTimer(mState, TIMEOUT_POWER_ON_MS);
} else {
sendSetStreamPath();
}
return true;
}
return false;
}
private void turnOnDevice() {
sendUserControlPressedAndReleased(mTarget.getLogicalAddress(),
HdmiCecKeycode.CEC_KEYCODE_POWER);
sendUserControlPressedAndReleased(mTarget.getLogicalAddress(),
HdmiCecKeycode.CEC_KEYCODE_POWER_ON_FUNCTION);
mState = STATE_WAIT_FOR_DEVICE_POWER_ON;
addTimer(mState, TIMEOUT_POWER_ON_MS);
}
private void sendSetStreamPath() {
sendCommand(HdmiCecMessageBuilder.buildSetStreamPath(
getSourceAddress(), mTarget.getPhysicalAddress()));
invokeCallback(HdmiControlManager.RESULT_SUCCESS);
finish();
}
@Override
public void handleTimerEvent(int timeoutState) {
if (mState != timeoutState) {
Slog.w(TAG, "Timer in a wrong state. Ignored.");
return;
}
switch (mState) {
case STATE_WAIT_FOR_REPORT_POWER_STATUS:
if (tv().isPowerStandbyOrTransient()) {
invokeCallback(HdmiControlManager.RESULT_INCORRECT_MODE);
finish();
return;
}
sendSetStreamPath();
break;
case STATE_WAIT_FOR_DEVICE_TO_TRANSIT_TO_STANDBY:
case STATE_WAIT_FOR_DEVICE_POWER_ON:
mPowerStatusCounter++;
queryDevicePowerStatus();
break;
}
}
private void invokeCallback(int result) {
if (mCallback == null) {
return;
}
try {
mCallback.onComplete(result);
} catch (RemoteException e) {
Slog.e(TAG, "Callback failed:" + e);
}
}
}
|