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1 // Copyright 2017 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef REMOTING_HOST_WIN_DEFAULT_AUDIO_DEVICE_CHANGE_DETECTOR_H_ | |
6 #define REMOTING_HOST_WIN_DEFAULT_AUDIO_DEVICE_CHANGE_DETECTOR_H_ | |
7 | |
8 #include <mmdeviceapi.h> | |
9 | |
10 #include "base/synchronization/lock.h" | |
11 | |
12 namespace remoting { | |
13 | |
14 // An IMMNotificationClient implementation to detect the change of the default | |
15 // audio output device on the system. | |
16 // This class does not use the default referring memory management method | |
Sergey Ulanov
2017/04/13 01:30:12
s/default referring memory management method/refer
Hzj_jie
2017/04/13 17:26:16
I have not noticed the mm_device_enumerator_ is fo
| |
17 // provided by IUnknown: the | |
18 // IMMDeviceEnumerator::RegisterEndpointNotificationCallback() will be called in | |
19 // the constructor, and | |
20 // IMMDeviceEnumerator::UnregisterEndpointNotificationCallback() will be called | |
Sergey Ulanov
2017/04/13 01:30:12
s/will be/is/ in the two places above.
Hzj_jie
2017/04/13 17:26:16
Done.
| |
21 // in the destructor. Consumers should ensure the input IMMDeviceEnumerator | |
22 // outlives this instance. | |
23 class DefaultAudioDeviceChangeDetector final : public IMMNotificationClient { | |
24 public: | |
25 DefaultAudioDeviceChangeDetector(IMMDeviceEnumerator* enumerator); | |
26 ~DefaultAudioDeviceChangeDetector(); | |
27 | |
28 HRESULT __stdcall OnDefaultDeviceChanged(EDataFlow flow, | |
Sergey Ulanov
2017/04/13 01:30:12
Move IMMNotificationClient implementation to the p
Hzj_jie
2017/04/13 17:26:16
Done.
| |
29 ERole role, | |
30 LPCWSTR pwstrDefaultDevice) override; | |
31 | |
32 HRESULT __stdcall QueryInterface(REFIID iid, void** object) override; | |
33 | |
34 bool GetAndReset(); | |
35 | |
36 // No-ops overrides. | |
37 HRESULT __stdcall OnDeviceAdded(LPCWSTR pwstrDeviceId) override { | |
Sergey Ulanov
2017/04/13 01:30:12
Normally all virtual method overrides should be in
Hzj_jie
2017/04/13 17:26:16
Done.
| |
38 return S_OK; | |
39 } | |
40 HRESULT __stdcall OnDeviceRemoved(LPCWSTR pwstrDeviceId) override { | |
41 return S_OK; | |
42 } | |
43 HRESULT __stdcall OnDeviceStateChanged(LPCWSTR pwstrDeviceId, | |
44 DWORD dwNewState) override { | |
45 return S_OK; | |
46 } | |
47 HRESULT __stdcall OnPropertyValueChanged(LPCWSTR pwstrDeviceId, | |
48 const PROPERTYKEY key) override { | |
49 return S_OK; | |
50 } | |
51 ULONG __stdcall AddRef() override { return 1; } | |
52 ULONG __stdcall Release() override { return 1; } | |
53 | |
54 private: | |
55 IMMDeviceEnumerator* const enumerator_; | |
56 bool changed_ = false; | |
57 base::Lock lock_; | |
58 }; | |
59 | |
60 } // namespace remoting | |
61 | |
62 #endif // REMOTING_HOST_WIN_DEFAULT_AUDIO_DEVICE_CHANGE_DETECTOR_H_ | |
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