private async Task Activate() { var icbh = new ActivateAudioInterfaceCompletionHandler( ac2 => { if (this.audioClientProperties != null) { IntPtr p = Marshal.AllocHGlobal(Marshal.SizeOf(this.audioClientProperties.Value)); Marshal.StructureToPtr(this.audioClientProperties.Value, p, false); ac2.SetClientProperties(p); Marshal.FreeHGlobal(p); // TODO: consider whether we can marshal this without the need for AllocHGlobal } /*var wfx = new WaveFormat(44100, 16, 2); * int hr = ac2.Initialize(AudioClientShareMode.Shared, * AudioClientStreamFlags.EventCallback | AudioClientStreamFlags.NoPersist, * 10000000, 0, wfx, IntPtr.Zero);*/ }); var IID_IAudioClient2 = new Guid("726778CD-F60A-4eda-82DE-E47610CD78AA"); IActivateAudioInterfaceAsyncOperation activationOperation; NativeMethods.ActivateAudioInterfaceAsync(device, IID_IAudioClient2, IntPtr.Zero, icbh, out activationOperation); var audioClient2 = await icbh; this.audioClient = new AudioClient((IAudioClient2)audioClient2); }
/// <summary> /// Initializes the capture device. Must be called on the UI (STA) thread. /// If not called manually then StartRecording() will call it internally. /// </summary> public async Task InitAsync() { if (captureState == WasapiCaptureState.Disposed) { throw new ObjectDisposedException(nameof(WasapiCaptureRT)); } if (captureState != WasapiCaptureState.Uninitialized) { throw new InvalidOperationException("Already initialized"); } /* var icbh = new ActivateAudioInterfaceCompletionHandler(ac2 => InitializeCaptureDevice((IAudioClient)ac2)); * IActivateAudioInterfaceAsyncOperation activationOperation; * // must be called on UI thread * NativeMethods.ActivateAudioInterfaceAsync(device, IID_IAudioClient2, IntPtr.Zero, icbh, out activationOperation); * * audioClient = new AudioClient((IAudioClient)(await icbh)); * * hEvent = NativeMethods.CreateEventExW(IntPtr.Zero, IntPtr.Zero, 0, EventAccess.EVENT_ALL_ACCESS); * audioClient.SetEventHandle(hEvent);*/ var icbh = new ActivateAudioInterfaceCompletionHandler(ac2 => { if (this.audioClientProperties != null) { IntPtr p = Marshal.AllocHGlobal(Marshal.SizeOf(this.audioClientProperties.Value)); Marshal.StructureToPtr(this.audioClientProperties.Value, p, false); ac2.SetClientProperties(p); Marshal.FreeHGlobal(p); // TODO: consider whether we can marshal this without the need for AllocHGlobal } InitializeCaptureDevice((IAudioClient2)ac2); audioClient = new AudioClient((IAudioClient2)ac2); hEvent = NativeMethods.CreateEventExW(IntPtr.Zero, IntPtr.Zero, 0, EventAccess.EVENT_ALL_ACCESS); audioClient.SetEventHandle(hEvent); }); IActivateAudioInterfaceAsyncOperation activationOperation; // must be called on UI thread NativeMethods.ActivateAudioInterfaceAsync(device, IID_IAudioClient2, IntPtr.Zero, icbh, out activationOperation); await icbh; captureState = WasapiCaptureState.Stopped; }
private async Task Activate() { var icbh = new ActivateAudioInterfaceCompletionHandler( ac2 => { /*var wfx = new WaveFormat(44100, 16, 2); * int hr = ac2.Initialize(AudioClientShareMode.Shared, * AudioClientStreamFlags.EventCallback | AudioClientStreamFlags.NoPersist, * 10000000, 0, wfx, IntPtr.Zero);*/ }); var IID_IAudioClient2 = new Guid("726778CD-F60A-4eda-82DE-E47610CD78AA"); IActivateAudioInterfaceAsyncOperation activationOperation; NativeMethods.ActivateAudioInterfaceAsync(device, IID_IAudioClient2, IntPtr.Zero, icbh, out activationOperation); var audioClient2 = await icbh; this.audioClient = new AudioClient((IAudioClient)audioClient2); }