1/*
2 *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
12#include "webrtc/system_wrappers/include/tick_util.h"
13#include "webrtc/voice_engine/monitor_module.h"
14
15namespace webrtc  {
16
17namespace voe  {
18
19MonitorModule::MonitorModule() :
20    _observerPtr(NULL),
21    _callbackCritSect(*CriticalSectionWrapper::CreateCriticalSection()),
22    _lastProcessTime(TickTime::MillisecondTimestamp())
23{
24}
25
26MonitorModule::~MonitorModule()
27{
28    delete &_callbackCritSect;
29}
30
31int32_t
32MonitorModule::RegisterObserver(MonitorObserver& observer)
33{
34    CriticalSectionScoped lock(&_callbackCritSect);
35    if (_observerPtr)
36    {
37        return -1;
38    }
39    _observerPtr = &observer;
40    return 0;
41}
42
43int32_t
44MonitorModule::DeRegisterObserver()
45{
46    CriticalSectionScoped lock(&_callbackCritSect);
47    if (!_observerPtr)
48    {
49        return 0;
50    }
51    _observerPtr = NULL;
52    return 0;
53}
54
55int64_t
56MonitorModule::TimeUntilNextProcess()
57{
58    int64_t now = TickTime::MillisecondTimestamp();
59    const int64_t kAverageProcessUpdateTimeMs = 1000;
60    return kAverageProcessUpdateTimeMs - (now - _lastProcessTime);
61}
62
63int32_t
64MonitorModule::Process()
65{
66    _lastProcessTime = TickTime::MillisecondTimestamp();
67    if (_observerPtr)
68    {
69        CriticalSectionScoped lock(&_callbackCritSect);
70        _observerPtr->OnPeriodicProcess();
71    }
72    return 0;
73}
74
75}  // namespace voe
76
77}  // namespace webrtc
78