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 
17 package com.android.server.telecom;
18 
19 import android.content.ContentResolver;
20 import android.provider.Settings;
21 
22 /**
23  * A helper class which serves only to make it easier to lookup timeout values. This class should
24  * never be instantiated, and only accessed through the {@link #get(String, long)} method.
25  *
26  * These methods are safe to call from any thread, including the UI thread.
27  */
28 public final class Timeouts {
29     public static class Adapter {
Adapter()30         public Adapter() { }
31 
getCallScreeningTimeoutMillis(ContentResolver cr)32         public long getCallScreeningTimeoutMillis(ContentResolver cr) {
33             return Timeouts.getCallScreeningTimeoutMillis(cr);
34         }
35     }
36 
37     /** A prefix to use for all keys so to not clobber the global namespace. */
38     private static final String PREFIX = "telecom.";
39 
Timeouts()40     private Timeouts() {}
41 
42     /**
43      * Returns the timeout value from Settings or the default value if it hasn't been changed. This
44      * method is safe to call from any thread, including the UI thread.
45      *
46      * @param contentResolver The content resolved.
47      * @param key Settings key to retrieve.
48      * @param defaultValue Default value, in milliseconds.
49      * @return The timeout value from Settings or the default value if it hasn't been changed.
50      */
get(ContentResolver contentResolver, String key, long defaultValue)51     private static long get(ContentResolver contentResolver, String key, long defaultValue) {
52         return Settings.Secure.getLong(contentResolver, PREFIX + key, defaultValue);
53     }
54 
55     /**
56      * Returns the longest period, in milliseconds, to wait for the query for direct-to-voicemail
57      * to complete. If the query goes beyond this timeout, the incoming call screen is shown to the
58      * user.
59      */
getDirectToVoicemailMillis(ContentResolver contentResolver)60     public static long getDirectToVoicemailMillis(ContentResolver contentResolver) {
61         return get(contentResolver, "direct_to_voicemail_ms", 500L);
62     }
63 
64     /**
65      * Returns the amount of time to wait before disconnecting a call that was canceled via
66      * NEW_OUTGOING_CALL broadcast. This timeout allows apps which repost the call using a gateway
67      * to reuse the existing call, preventing the call from causing a start->end->start jank in the
68      * in-call UI.
69      */
getNewOutgoingCallCancelMillis(ContentResolver contentResolver)70     public static long getNewOutgoingCallCancelMillis(ContentResolver contentResolver) {
71         return get(contentResolver, "new_outgoing_call_cancel_ms", 400L);
72     }
73 
74     /**
75      * Returns the amount of time to play each DTMF tone after post dial continue.
76      * This timeout allows the current tone to play for a certain amount of time before either being
77      * interrupted by the next tone or terminated.
78      */
getDelayBetweenDtmfTonesMillis(ContentResolver contentResolver)79     public static long getDelayBetweenDtmfTonesMillis(ContentResolver contentResolver) {
80         return get(contentResolver, "delay_between_dtmf_tones_ms", 300L);
81     }
82 
83     /**
84      * Returns the amount of time to wait for an emergency call to be placed before routing to
85      * a different call service. A value of 0 or less means no timeout should be used.
86      */
getEmergencyCallTimeoutMillis(ContentResolver contentResolver)87     public static long getEmergencyCallTimeoutMillis(ContentResolver contentResolver) {
88         return get(contentResolver, "emergency_call_timeout_millis", 25000L /* 25 seconds */);
89     }
90 
91     /**
92      * Returns the amount of time to wait for an emergency call to be placed before routing to
93      * a different call service. This timeout is used only when the radio is powered off (for
94      * example in airplane mode). A value of 0 or less means no timeout should be used.
95      */
getEmergencyCallTimeoutRadioOffMillis(ContentResolver contentResolver)96     public static long getEmergencyCallTimeoutRadioOffMillis(ContentResolver contentResolver) {
97         return get(contentResolver, "emergency_call_timeout_radio_off_millis",
98                 60000L /* 1 minute */);
99     }
100 
101     /**
102      * Returns the amount of delay before unbinding the in-call services after all the calls
103      * are removed.
104      */
getCallRemoveUnbindInCallServicesDelay(ContentResolver contentResolver)105     public static long getCallRemoveUnbindInCallServicesDelay(ContentResolver contentResolver) {
106         return get(contentResolver, "call_remove_unbind_in_call_services_delay",
107                 2000L /* 2 seconds */);
108     }
109 
110     /**
111      * Returns the amount of time for which bluetooth is considered connected after requesting
112      * connection. This compensates for the amount of time it takes for the audio route to
113      * actually change to bluetooth.
114      */
getBluetoothPendingTimeoutMillis(ContentResolver contentResolver)115     public static long getBluetoothPendingTimeoutMillis(ContentResolver contentResolver) {
116         return get(contentResolver, "bluetooth_pending_timeout_millis", 5000L);
117     }
118 
119     /**
120      * Returns the amount of time to wait before retrying the connectAudio call. This is
121      * necessary to account for the HeadsetStateMachine sometimes not being ready when we want to
122      * connect to bluetooth audio immediately after a device connects.
123      */
getRetryBluetoothConnectAudioBackoffMillis(ContentResolver contentResolver)124     public static long getRetryBluetoothConnectAudioBackoffMillis(ContentResolver contentResolver) {
125         return get(contentResolver, "retry_bluetooth_connect_audio_backoff_millis", 500L);
126     }
127 
128     /**
129      * Returns the amount of time after a Logging session has been started that Telecom is set to
130      * perform a sweep to check and make sure that the session is still not incomplete (stale).
131      */
getStaleSessionCleanupTimeoutMillis(ContentResolver contentResolver)132     public static long getStaleSessionCleanupTimeoutMillis(ContentResolver contentResolver) {
133         return get(contentResolver, "stale_session_cleanup_timeout_millis",
134                 Log.DEFAULT_SESSION_TIMEOUT_MS);
135     }
136 
137     /**
138      * Returns the amount of time to wait for the call screening service to allow or disallow a
139      * call.
140      */
getCallScreeningTimeoutMillis(ContentResolver contentResolver)141     public static long getCallScreeningTimeoutMillis(ContentResolver contentResolver) {
142         return get(contentResolver, "call_screening_timeout", 5000L /* 5 seconds */);
143     }
144 
145     /**
146      * Returns the amount of time to wait for the block checker to allow or disallow a call.
147      */
getBlockCheckTimeoutMillis(ContentResolver contentResolver)148     public static long getBlockCheckTimeoutMillis(ContentResolver contentResolver) {
149         return get(contentResolver, "block_check_timeout_millis", 500L);
150     }
151 }
152