| // Copyright (c) 2012 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_AUDIO_CAPTURER_WIN_H_ |
| #define REMOTING_HOST_AUDIO_CAPTURER_WIN_H_ |
| |
| #include <audioclient.h> |
| #include <endpointvolume.h> |
| #include <mmdeviceapi.h> |
| |
| #include <memory> |
| |
| #include "base/macros.h" |
| #include "base/threading/thread_checker.h" |
| #include "base/timer/timer.h" |
| #include "base/win/scoped_co_mem.h" |
| #include "base/win/scoped_comptr.h" |
| #include "remoting/host/audio_capturer.h" |
| #include "remoting/host/audio_silence_detector.h" |
| #include "remoting/proto/audio.pb.h" |
| |
| namespace remoting { |
| |
| class AudioCapturerWin : public AudioCapturer { |
| public: |
| AudioCapturerWin(); |
| ~AudioCapturerWin() override; |
| |
| // AudioCapturer interface. |
| bool Start(const PacketCapturedCallback& callback) override; |
| |
| private: |
| // An IMMNotificationClient implementation to detect the event of default |
| // audio device recently changed. If it indicates a changed happend recently, |
| // we need to recreate all audio components. |
| class MMNotificationClient; |
| |
| // Executes Deinitialize() and Initialize(). If Initialize() function call |
| // returns false, Deinitialize() will be called again to ensure we will |
| // initialize COM components again. |
| bool ResetAndInitialize(); |
| |
| // Resets all COM components to nullptr, so is_initialized() will return |
| // false. |
| void Deinitialize(); |
| |
| // Initializes default audio device related components. These components must |
| // be recreated once the default audio device changed. Returns false if |
| // initialization failed. |
| bool Initialize(); |
| |
| // Whether all components are correctly initialized. If last |
| // Initialize() function call failed, this function will return false. |
| // Otherwise this function will return true. |
| bool is_initialized() const; |
| |
| // Receives all packets from the audio capture endpoint buffer and pushes them |
| // to the network. |
| void DoCapture(); |
| |
| // Returns current volume setting of the host, in range [0.0, 1.0]. If the |
| // audio has been muted, this function returns 0. If Windows API returns error |
| // (such as audio device has been disabled or unpluged), this function ignores |
| // host volume setting, and returns 1.0. |
| float GetAudioLevel(); |
| |
| // Processes a series of samples, and executes callback if the packet is |
| // qualified to be sent to client. |
| void ProcessSamples(uint8_t* data, size_t frames); |
| |
| PacketCapturedCallback callback_; |
| |
| AudioPacket::SamplingRate sampling_rate_; |
| |
| std::unique_ptr<base::RepeatingTimer> capture_timer_; |
| base::TimeDelta audio_device_period_; |
| |
| AudioSilenceDetector silence_detector_; |
| |
| base::win::ScopedCoMem<WAVEFORMATEX> wave_format_ex_; |
| base::win::ScopedComPtr<IMMDeviceEnumerator> mm_device_enumerator_; |
| base::win::ScopedComPtr<IAudioCaptureClient> audio_capture_client_; |
| base::win::ScopedComPtr<IAudioClient> audio_client_; |
| base::win::ScopedComPtr<IMMDevice> mm_device_; |
| base::win::ScopedComPtr<IAudioEndpointVolume> audio_volume_; |
| |
| const std::unique_ptr<MMNotificationClient> mm_notification_client_; |
| |
| HRESULT last_capture_error_; |
| |
| base::ThreadChecker thread_checker_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AudioCapturerWin); |
| }; |
| |
| } // namespace remoting |
| |
| #endif // REMOTING_HOST_AUDIO_CAPTURER_WIN_H_ |