/// <summary> /// Asynchronously starts video mode. /// /// Activates the web camera with the various settings specified in CameraParameters. /// Only one VideoCapture instance can start the video mode at any given time. /// After starting the video mode, you listen for new video frame samples via the VideoCapture.FrameSampleAcquired event, /// or by calling VideoCapture.RequestNextFrameSample() when will return the next available sample. /// While in video mode, more power will be consumed so make sure that you call VideoCapture.StopVideoModeAsync qhen you can afford the start/stop video mode overhead. /// </summary> /// <param name="setupParams">Parameters that change how video mode is used.</param> /// <param name="onVideoModeStartedCallback">This callback will be invoked once video mode has been activated.</param> public async void StartVideoModeAsync(UnityEngine.Windows.WebCam.CameraParameters setupParams, OnVideoModeStartedCallback onVideoModeStartedCallback) { var mediaFrameSource = _mediaCapture.FrameSources[_frameSourceInfo.Id]; //Returns a MediaFrameSource if (mediaFrameSource == null) { onVideoModeStartedCallback?.Invoke(new VideoCaptureResult(1, ResultType.UnknownError, false)); return; } var pixelFormat = ConvertCapturePixelFormatToMediaEncodingSubtype(setupParams.pixelFormat); _frameReader = await _mediaCapture.CreateFrameReaderAsync(mediaFrameSource, pixelFormat); _frameReader.FrameArrived += HandleFrameArrived; await _frameReader.StartAsync(); VideoEncodingProperties properties = GetVideoEncodingPropertiesForCameraParams(setupParams); // Historical context: https://github.com/VulcanTechnologies/HoloLensCameraStream/issues/6 if (setupParams.rotateImage180Degrees) { properties.Properties.Add(ROTATION_KEY, 180); } // gr: taken from here https://forums.hololens.com/discussion/2009/mixedrealitycapture IVideoEffectDefinition ved = new VideoMRCSettings(setupParams.enableHolograms, setupParams.enableVideoStabilization, setupParams.videoStabilizationBufferSize, setupParams.hologramOpacity); await _mediaCapture.AddVideoEffectAsync(ved, MediaStreamType.VideoPreview); await _mediaCapture.VideoDeviceController.SetMediaStreamPropertiesAsync(STREAM_TYPE, properties); onVideoModeStartedCallback?.Invoke(new VideoCaptureResult(0, ResultType.Success, true)); }
/// <summary> /// Asynchronously starts video mode. /// /// Activates the web camera with the various settings specified in CameraParameters. /// Only one VideoCapture instance can start the video mode at any given time. /// After starting the video mode, you listen for new video frame samples via the VideoCapture.FrameSampleAcquired event, /// or by calling VideoCapture.RequestNextFrameSample() when will return the next available sample. /// While in video mode, more power will be consumed so make sure that you call VideoCapture.StopVideoModeAsync qhen you can afford the start/stop video mode overhead. /// </summary> /// <param name="setupParams">Parameters that change how video mode is used.</param> /// <param name="onVideoModeStartedCallback">This callback will be invoked once video mode has been activated.</param> public async void StartVideoModeAsync(CameraParameters setupParams, OnVideoModeStartedCallback onVideoModeStartedCallback) { var mediaFrameSource = _mediaCapture.FrameSources[_frameSourceInfo.Id]; //Returns a MediaFrameSource if (mediaFrameSource == null) { onVideoModeStartedCallback?.Invoke(new VideoCaptureResult(1, ResultType.UnknownError, false)); return; } bool requires_change = mediaFrameSource.CurrentFormat.VideoFormat.Width != setupParams.cameraResolutionWidth || mediaFrameSource.CurrentFormat.VideoFormat.Height != setupParams.cameraResolutionHeight || (int)Math.Round(((double)mediaFrameSource.CurrentFormat.FrameRate.Numerator / mediaFrameSource.CurrentFormat.FrameRate.Denominator)) != setupParams.frameRate; if (requires_change) { await SetFrameType(mediaFrameSource, setupParams.cameraResolutionWidth, setupParams.cameraResolutionHeight, setupParams.frameRate); } // gr: taken from here https://forums.hololens.com/discussion/2009/mixedrealitycapture IVideoEffectDefinition ved = new VideoMRCSettings(setupParams.enableHolograms, setupParams.enableVideoStabilization, setupParams.videoStabilizationBufferSize, setupParams.hologramOpacity, setupParams.recordingIndicatorVisible); await _mediaCapture.AddVideoEffectAsync(ved, STREAM_TYPE); if (!_sharedStream) { VideoEncodingProperties properties = GetVideoEncodingPropertiesForCameraParams(setupParams); // Historical context: https://github.com/VulcanTechnologies/HoloLensCameraStream/issues/6 if (setupParams.rotateImage180Degrees) { properties.Properties.Add(ROTATION_KEY, 180); } // We can't modify the stream properties if we are sharing the stream await _mediaCapture.VideoDeviceController.SetMediaStreamPropertiesAsync(STREAM_TYPE, properties); } var pixelFormat = ConvertCapturePixelFormatToMediaEncodingSubtype(setupParams.pixelFormat); _frameReader = await _mediaCapture.CreateFrameReaderAsync(mediaFrameSource, pixelFormat); _frameReader.FrameArrived += HandleFrameArrived; await _frameReader.StartAsync(); onVideoModeStartedCallback?.Invoke(new VideoCaptureResult(0, ResultType.Success, true)); }