1 /*
2 * libjingle
3 * Copyright 2004 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 <assert.h>
29 #include "talk/session/media/audiomonitor.h"
30 #include "talk/session/media/voicechannel.h"
31
32 namespace cricket {
33
34 const uint32_t MSG_MONITOR_POLL = 1;
35 const uint32_t MSG_MONITOR_START = 2;
36 const uint32_t MSG_MONITOR_STOP = 3;
37 const uint32_t MSG_MONITOR_SIGNAL = 4;
38
AudioMonitor(VoiceChannel * voice_channel,rtc::Thread * monitor_thread)39 AudioMonitor::AudioMonitor(VoiceChannel *voice_channel,
40 rtc::Thread *monitor_thread) {
41 voice_channel_ = voice_channel;
42 monitoring_thread_ = monitor_thread;
43 monitoring_ = false;
44 }
45
~AudioMonitor()46 AudioMonitor::~AudioMonitor() {
47 voice_channel_->worker_thread()->Clear(this);
48 monitoring_thread_->Clear(this);
49 }
50
Start(int milliseconds)51 void AudioMonitor::Start(int milliseconds) {
52 rate_ = milliseconds;
53 if (rate_ < 100)
54 rate_ = 100;
55 voice_channel_->worker_thread()->Post(this, MSG_MONITOR_START);
56 }
57
Stop()58 void AudioMonitor::Stop() {
59 voice_channel_->worker_thread()->Post(this, MSG_MONITOR_STOP);
60 }
61
OnMessage(rtc::Message * message)62 void AudioMonitor::OnMessage(rtc::Message *message) {
63 rtc::CritScope cs(&crit_);
64
65 switch (message->message_id) {
66 case MSG_MONITOR_START:
67 assert(rtc::Thread::Current() == voice_channel_->worker_thread());
68 if (!monitoring_) {
69 monitoring_ = true;
70 PollVoiceChannel();
71 }
72 break;
73
74 case MSG_MONITOR_STOP:
75 assert(rtc::Thread::Current() == voice_channel_->worker_thread());
76 if (monitoring_) {
77 monitoring_ = false;
78 voice_channel_->worker_thread()->Clear(this);
79 }
80 break;
81
82 case MSG_MONITOR_POLL:
83 assert(rtc::Thread::Current() == voice_channel_->worker_thread());
84 PollVoiceChannel();
85 break;
86
87 case MSG_MONITOR_SIGNAL:
88 {
89 assert(rtc::Thread::Current() == monitoring_thread_);
90 AudioInfo info = audio_info_;
91 crit_.Leave();
92 SignalUpdate(this, info);
93 crit_.Enter();
94 }
95 break;
96 }
97 }
98
PollVoiceChannel()99 void AudioMonitor::PollVoiceChannel() {
100 rtc::CritScope cs(&crit_);
101 assert(rtc::Thread::Current() == voice_channel_->worker_thread());
102
103 // Gather connection infos
104 audio_info_.input_level = voice_channel_->GetInputLevel_w();
105 audio_info_.output_level = voice_channel_->GetOutputLevel_w();
106 voice_channel_->GetActiveStreams_w(&audio_info_.active_streams);
107
108 // Signal the monitoring thread, start another poll timer
109 monitoring_thread_->Post(this, MSG_MONITOR_SIGNAL);
110 voice_channel_->worker_thread()->PostDelayed(rate_, this, MSG_MONITOR_POLL);
111 }
112
voice_channel()113 VoiceChannel *AudioMonitor::voice_channel() {
114 return voice_channel_;
115 }
116
monitor_thread()117 rtc::Thread *AudioMonitor::monitor_thread() {
118 return monitoring_thread_;
119 }
120
121 }
122