1/*
2 * libjingle
3 * Copyright 2005 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/session/media/channelmanager.h"
29#include "talk/session/media/mediamonitor.h"
30#include "webrtc/base/common.h"
31
32namespace cricket {
33
34enum {
35  MSG_MONITOR_POLL = 1,
36  MSG_MONITOR_START = 2,
37  MSG_MONITOR_STOP = 3,
38  MSG_MONITOR_SIGNAL = 4
39};
40
41MediaMonitor::MediaMonitor(rtc::Thread* worker_thread,
42                           rtc::Thread* monitor_thread)
43    : worker_thread_(worker_thread),
44      monitor_thread_(monitor_thread), monitoring_(false), rate_(0) {
45}
46
47MediaMonitor::~MediaMonitor() {
48  monitoring_ = false;
49  monitor_thread_->Clear(this);
50  worker_thread_->Clear(this);
51}
52
53void MediaMonitor::Start(uint32 milliseconds) {
54  rate_ = milliseconds;
55  if (rate_ < 100)
56    rate_ = 100;
57  worker_thread_->Post(this, MSG_MONITOR_START);
58}
59
60void MediaMonitor::Stop() {
61  worker_thread_->Post(this, MSG_MONITOR_STOP);
62  rate_ = 0;
63}
64
65void MediaMonitor::OnMessage(rtc::Message* message) {
66  rtc::CritScope cs(&crit_);
67
68  switch (message->message_id) {
69  case MSG_MONITOR_START:
70    ASSERT(rtc::Thread::Current() == worker_thread_);
71    if (!monitoring_) {
72      monitoring_ = true;
73      PollMediaChannel();
74    }
75    break;
76
77  case MSG_MONITOR_STOP:
78    ASSERT(rtc::Thread::Current() == worker_thread_);
79    if (monitoring_) {
80      monitoring_ = false;
81      worker_thread_->Clear(this);
82    }
83    break;
84
85  case MSG_MONITOR_POLL:
86    ASSERT(rtc::Thread::Current() == worker_thread_);
87    PollMediaChannel();
88    break;
89
90  case MSG_MONITOR_SIGNAL:
91    ASSERT(rtc::Thread::Current() == monitor_thread_);
92    Update();
93    break;
94  }
95}
96
97void MediaMonitor::PollMediaChannel() {
98  rtc::CritScope cs(&crit_);
99  ASSERT(rtc::Thread::Current() == worker_thread_);
100
101  GetStats();
102
103  // Signal the monitoring thread, start another poll timer
104  monitor_thread_->Post(this, MSG_MONITOR_SIGNAL);
105  worker_thread_->PostDelayed(rate_, this, MSG_MONITOR_POLL);
106}
107
108}
109