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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 #ifndef TALK_SESSION_MEDIA_AUDIOMONITOR_H_
29 #define TALK_SESSION_MEDIA_AUDIOMONITOR_H_
30 
31 #include <vector>
32 #include "webrtc/p2p/base/port.h"
33 #include "webrtc/base/sigslot.h"
34 #include "webrtc/base/thread.h"
35 
36 namespace cricket {
37 
38 class VoiceChannel;
39 
40 struct AudioInfo {
41   int input_level;
42   int output_level;
43   typedef std::vector<std::pair<uint32_t, int> > StreamList;
44   StreamList active_streams; // ssrcs contributing to output_level
45 };
46 
47 class AudioMonitor : public rtc::MessageHandler,
48     public sigslot::has_slots<> {
49  public:
50   AudioMonitor(VoiceChannel* voice_channel, rtc::Thread *monitor_thread);
51   ~AudioMonitor();
52 
53   void Start(int cms);
54   void Stop();
55 
56   VoiceChannel* voice_channel();
57   rtc::Thread *monitor_thread();
58 
59   sigslot::signal2<AudioMonitor*, const AudioInfo&> SignalUpdate;
60 
61  protected:
62   void OnMessage(rtc::Message *message);
63   void PollVoiceChannel();
64 
65   AudioInfo audio_info_;
66   VoiceChannel* voice_channel_;
67   rtc::Thread* monitoring_thread_;
68   rtc::CriticalSection crit_;
69   uint32_t rate_;
70   bool monitoring_;
71 };
72 
73 }
74 
75 #endif  // TALK_SESSION_MEDIA_AUDIOMONITOR_H_
76