| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef REMOTING_HOST_WIN_AUDIO_VOLUME_FILTER_WIN_H_ |
| #define REMOTING_HOST_WIN_AUDIO_VOLUME_FILTER_WIN_H_ |
| |
| #include <endpointvolume.h> |
| #include <mmdeviceapi.h> |
| #include <wrl/client.h> |
| |
| #include "remoting/host/audio_volume_filter.h" |
| |
| namespace remoting { |
| |
| // An implementation of AudioVolumeFilter for Windows only. |
| class AudioVolumeFilterWin : public AudioVolumeFilter { |
| public: |
| explicit AudioVolumeFilterWin(int silence_threshold); |
| ~AudioVolumeFilterWin() override; |
| |
| // Initializes |audio_volume_|. Returns false if Windows APIs fail. |
| bool ActivateBy(IMMDevice* mm_device); |
| |
| protected: |
| // Returns current audio level from |audio_volume_|. If the initialization |
| // failed, this function returns 1. |
| float GetAudioLevel() override; |
| |
| private: |
| Microsoft::WRL::ComPtr<IAudioEndpointVolume> audio_volume_; |
| }; |
| |
| } // namespace remoting |
| |
| #endif // REMOTING_HOST_WIN_AUDIO_VOLUME_FILTER_WIN_H_ |