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 "talk/p2p/base/port.h"
33#include "webrtc/base/sigslot.h"
34#include "webrtc/base/thread.h"
35
36namespace cricket {
37
38class VoiceChannel;
39
40struct AudioInfo {
41  int input_level;
42  int output_level;
43  typedef std::vector<std::pair<uint32, int> > StreamList;
44  StreamList active_streams; // ssrcs contributing to output_level
45};
46
47class 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 rate_;
70  bool monitoring_;
71};
72
73}
74
75#endif  // TALK_SESSION_MEDIA_AUDIOMONITOR_H_
76