1 /*
2 * libjingle
3 * Copyright 2005--2007, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "talk/base/common.h"
29 #include "talk/session/phone/mediamonitor.h"
30 #include "talk/session/phone/channelmanager.h"
31 #include "talk/session/phone/mediaengine.h"
32
33 namespace cricket {
34
35 enum {
36 MSG_MONITOR_POLL = 1,
37 MSG_MONITOR_START = 2,
38 MSG_MONITOR_STOP = 3,
39 MSG_MONITOR_SIGNAL = 4
40 };
41
MediaMonitor(talk_base::Thread * worker_thread,talk_base::Thread * monitor_thread)42 MediaMonitor::MediaMonitor(talk_base::Thread* worker_thread,
43 talk_base::Thread* monitor_thread)
44 : worker_thread_(worker_thread),
45 monitor_thread_(monitor_thread), monitoring_(false), rate_(0) {
46 }
47
~MediaMonitor()48 MediaMonitor::~MediaMonitor() {
49 monitoring_ = false;
50 monitor_thread_->Clear(this);
51 worker_thread_->Clear(this);
52 }
53
Start(uint32 milliseconds)54 void MediaMonitor::Start(uint32 milliseconds) {
55 rate_ = milliseconds;
56 if (rate_ < 100)
57 rate_ = 100;
58 worker_thread_->Post(this, MSG_MONITOR_START);
59 }
60
Stop()61 void MediaMonitor::Stop() {
62 worker_thread_->Post(this, MSG_MONITOR_STOP);
63 rate_ = 0;
64 }
65
OnMessage(talk_base::Message * message)66 void MediaMonitor::OnMessage(talk_base::Message* message) {
67 talk_base::CritScope cs(&crit_);
68
69 switch (message->message_id) {
70 case MSG_MONITOR_START:
71 ASSERT(talk_base::Thread::Current() == worker_thread_);
72 if (!monitoring_) {
73 monitoring_ = true;
74 PollMediaChannel();
75 }
76 break;
77
78 case MSG_MONITOR_STOP:
79 ASSERT(talk_base::Thread::Current() == worker_thread_);
80 if (monitoring_) {
81 monitoring_ = false;
82 worker_thread_->Clear(this);
83 }
84 break;
85
86 case MSG_MONITOR_POLL:
87 ASSERT(talk_base::Thread::Current() == worker_thread_);
88 PollMediaChannel();
89 break;
90
91 case MSG_MONITOR_SIGNAL:
92 ASSERT(talk_base::Thread::Current() == monitor_thread_);
93 Update();
94 break;
95 }
96 }
97
PollMediaChannel()98 void MediaMonitor::PollMediaChannel() {
99 talk_base::CritScope cs(&crit_);
100 ASSERT(talk_base::Thread::Current() == worker_thread_);
101
102 GetStats();
103
104 // Signal the monitoring thread, start another poll timer
105 monitor_thread_->Post(this, MSG_MONITOR_SIGNAL);
106 worker_thread_->PostDelayed(rate_, this, MSG_MONITOR_POLL);
107 }
108
109 }
110