public Task ResumeVideo()
{
if (_mediaFrameReader != null)
{
return(_mediaFrameReader.StartAsync().AsTask());
}
else
{
return(Task.CompletedTask);
}
}
public override void StartStream()
{
paused = false;
if (!Streaming)
{
Streaming = true;
Reader.FrameArrived += NewFrameArrived;
var task = Reader.StartAsync();
while (task.Status == AsyncStatus.Started)
{
Thread.Sleep(50);
}
CaptureElement captureElement = null;
bool waiting = true;
Xamarin.Essentials.MainThread.BeginInvokeOnMainThread(() =>
{
captureElement = new CaptureElement
{
Source = NativeDevice
};
waiting = false;
});
NativeDevice.Failed += OnFail;
while (waiting)
{
Thread.Sleep(50);
}
Task.Run(() =>
{
while (Streaming)
{
if (StreamFaultTimer.ElapsedMilliseconds > 1000)
{
Debug.WriteLine("Been a second without frames. forcing a call");
var Task = Reader.StopAsync();
while (Task.Status == AsyncStatus.Started)
{
Thread.Sleep(50);
}
var taskt = Reader.StartAsync();
while (taskt.Status == AsyncStatus.Started)
{
Thread.Sleep(50);
}
StreamFaultTimer.Reset();
}
}
});
}
}
public override async Task Start()
{
MediaRecorder = await MediaCaptureHandler.Init(MediaCategory.Media, AudioProcessing.Raw);
// Start Recognition
await this.StartRecognition();
// Start frame recognizer
var frameSources = MediaRecorder.FrameSources.Where(x => x.Value.Info.MediaStreamType == MediaStreamType.Audio);
var source = frameSources.First().Value;
frameReader = await MediaRecorder.CreateFrameReaderAsync(source);
frameReader.AcquisitionMode = MediaFrameReaderAcquisitionMode.Buffered;
frameReader.FrameArrived += OnFrameArrived;
messageStream = new InMemoryRandomAccessStream();
await messageStream.WriteAsync(Utils.Audio.CreateWavHeader().AsBuffer());
var status = await frameReader.StartAsync();
if (status != MediaFrameReaderStartStatus.Success)
{
throw new Exception("The MediaFrameReader couldn't start.");
}
}
/// <summary>
/// The task to asynchronously starts the video pipeline and frame reading. The task should
/// be executed when the ARUWPController status is ARUWP_STATUS_CTRL_INITIALIZED, and will
/// change the status to ARUWP_STATUS_RUNNING if the task is successful. The task is wrapped
/// up in ARUWPController.Resume() function. [internal use]
/// </summary>
/// <returns>Whether the frame reader is successfully started</returns>
public async Task <bool> StartFrameReaderAsyncTask()
{
if (controller.status != ARUWP.ARUWP_STATUS_CTRL_INITIALIZED)
{
Debug.Log(TAG + ": StartFrameReaderAsyncTask() fails because of incorrect status");
return(false);
}
if (initializeVideoHere)
{
MediaFrameReaderStartStatus mediaFrameReaderStartStatus = await frameReader.StartAsync();
if (mediaFrameReaderStartStatus == MediaFrameReaderStartStatus.Success)
{
Debug.Log(TAG + ": StartFrameReaderAsyncTask() is successful");
controller.status = ARUWP.ARUWP_STATUS_RUNNING;
return(true);
}
else
{
Debug.Log(TAG + ": StartFrameReaderAsyncTask() is not successful, status = " + mediaFrameReaderStartStatus);
return(false);
}
}
else
{
Debug.Log(TAG + ": StartFrameReaderAsyncTask(): initializeVideoHere = false, mock-setting the controller status to ARUWP_STATUS_RUNNING despite not starting frameReader");
controller.status = ARUWP.ARUWP_STATUS_RUNNING;
return(true);
}
}
public async Task Initialize(VideoSetting videoSetting)
{
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAndAwaitAsync(CoreDispatcherPriority.Normal, async() =>
{
_threadsCount = videoSetting.UsedThreads;
_stoppedThreads = videoSetting.UsedThreads;
_lastFrameAdded.Start();
_imageQuality = new BitmapPropertySet();
var imageQualityValue = new BitmapTypedValue(videoSetting.VideoQuality, Windows.Foundation.PropertyType.Single);
_imageQuality.Add("ImageQuality", imageQualityValue);
_mediaCapture = new MediaCapture();
var frameSourceGroups = await MediaFrameSourceGroup.FindAllAsync();
var settings = new MediaCaptureInitializationSettings()
{
SharingMode = MediaCaptureSharingMode.ExclusiveControl,
//With CPU the results contain always SoftwareBitmaps, otherwise with GPU
//they preferring D3DSurface
MemoryPreference = MediaCaptureMemoryPreference.Cpu,
//Capture only video, no audio
StreamingCaptureMode = StreamingCaptureMode.Video
};
await _mediaCapture.InitializeAsync(settings);
var mediaFrameSource = _mediaCapture.FrameSources.First().Value;
var videoDeviceController = mediaFrameSource.Controller.VideoDeviceController;
videoDeviceController.DesiredOptimization = Windows.Media.Devices.MediaCaptureOptimization.Quality;
videoDeviceController.PrimaryUse = Windows.Media.Devices.CaptureUse.Video;
//Set exposure (auto light adjustment)
if (_mediaCapture.VideoDeviceController.Exposure.Capabilities.Supported &&
_mediaCapture.VideoDeviceController.Exposure.Capabilities.AutoModeSupported)
{
_mediaCapture.VideoDeviceController.Exposure.TrySetAuto(true);
}
var videoResolutionWidthHeight = VideoResolutionWidthHeight.Get(videoSetting.VideoResolution);
var videoSubType = VideoSubtypeHelper.Get(videoSetting.VideoSubtype);
//Set resolution, frame rate and video subtyp
var videoFormat = mediaFrameSource.SupportedFormats.Where(sf => sf.VideoFormat.Width == videoResolutionWidthHeight.Width &&
sf.VideoFormat.Height == videoResolutionWidthHeight.Height &&
sf.Subtype == videoSubType)
.OrderByDescending(m => m.FrameRate.Numerator / m.FrameRate.Denominator)
.First();
await mediaFrameSource.SetFormatAsync(videoFormat);
_mediaFrameReader = await _mediaCapture.CreateFrameReaderAsync(mediaFrameSource);
await _mediaFrameReader.StartAsync();
});
}
private async Task CreateFrameReader()
{
mediaFrameReader = await mediaCapture.CreateFrameReaderAsync(colorFrameSource, MediaEncodingSubtypes.Argb32);
mediaFrameReader.FrameArrived += ColorFrameReader_FrameArrived;
await mediaFrameReader.StartAsync();
}
public async Task InitMedia()
{
var groups = await MediaFrameSourceGroup.FindAllAsync();
capture = new MediaCapture();
var settings = new MediaCaptureInitializationSettings()
{
SourceGroup = groups[0],
SharingMode = MediaCaptureSharingMode.SharedReadOnly,
StreamingCaptureMode = StreamingCaptureMode.Video,
MemoryPreference = MediaCaptureMemoryPreference.Cpu
};
await capture.InitializeAsync(settings);
MediaFrameSource frameSource;
try
{
frameSource = capture.FrameSources.Values.First(x => x.Info.SourceKind == MediaFrameSourceKind.Color);
} catch
{
frameSource = capture.FrameSources.Values.First();
}
reader = await capture.CreateFrameReaderAsync(frameSource);
reader.FrameArrived += HandleFrames;
await reader.StartAsync();
}
static async Task <int> MainAsync(string[] args)
{
//Log.WriteLine("pause...");
//var x = Console.ReadLine();
Log.WriteLine("Starting async...");
Model model = null;
AzureConnection connection = null;
MediaFrameReader reader = null;
EventWaitHandle evtFrame = null;
await Task.WhenAll(
Task.Run(async() =>
model = await Model.CreateModelAsync(
Directory.GetCurrentDirectory() + "\\resources\\office_fruit_coreml.onnx")),
Task.Run(async() =>
connection = await AzureConnection.CreateAzureConnectionAsync()),
Task.Run(async() => {
(reader, evtFrame) = await GetFrameReaderAsync();
await AsyncHelper.SyncFromAsync(reader.StartAsync(), "reader start");
})
);
Log.WriteLine("Model loaded, Azure Connection created, and FrameReader Started\n\n\n\n");
await CameraProcessingAsync(model, reader, evtFrame, connection);
return(0);
}
/// <summary>
/// Initializes and starts Media Capture and frame reader.
/// </summary>
/// <param name=""></param>
/// <returns></returns>
private static async Task StartMediaCaptureAsync()
{
// Initialize media capture with default settings in video-only streaming mode and in shared mode so that multiple instances can access the camera concurrently
m_mediaCapture = new MediaCapture();
var mediaCaptureInistializationSettings = new MediaCaptureInitializationSettings()
{
StreamingCaptureMode = StreamingCaptureMode.Video,
SharingMode = MediaCaptureSharingMode.SharedReadOnly
};
await m_mediaCapture.InitializeAsync(mediaCaptureInistializationSettings);
var selectedFrameSource = m_mediaCapture.FrameSources.FirstOrDefault(source => source.Value.Info.MediaStreamType == MediaStreamType.VideoPreview &&
source.Value.Info.SourceKind == MediaFrameSourceKind.Color).Value;
if (selectedFrameSource == null)
{
selectedFrameSource = m_mediaCapture.FrameSources.FirstOrDefault(source => source.Value.Info.MediaStreamType == MediaStreamType.VideoRecord &&
source.Value.Info.SourceKind == MediaFrameSourceKind.Color).Value;
}
if (selectedFrameSource == null)
{
throw(new Exception("No valid video frame sources were found with source type color."));
}
Console.WriteLine($"{selectedFrameSource.Info.DeviceInformation?.Name} | MediaStreamType: {selectedFrameSource.Info.MediaStreamType} MediaFrameSourceKind: {selectedFrameSource.Info.SourceKind}");
m_frameReader = await m_mediaCapture.CreateFrameReaderAsync(selectedFrameSource);
m_frameReader.FrameArrived += FrameArrivedHandler;
m_frameReader.AcquisitionMode = MediaFrameReaderAcquisitionMode.Realtime;
await m_frameReader.StartAsync();
}
private async Task StartFrameListenerAsync()
{
if (frameListenerRunning)
{
Logger.Info("Frame listener already running. Restarting it...");
await StopFrameListenerAsync();
}
try
{
if (cameraCapture.FrameSources.Count > 0)
{
MediaFrameSource frameSource = cameraCapture.FrameSources.First().Value;
int count = cameraCapture.FrameSources.Count;
if (!(frameSource is null))
{
frameReader = await cameraCapture.CreateFrameReaderAsync(frameSource);
frameReader.FrameArrived += FrameReader_FrameArrived;
await frameReader.StartAsync();
frameListenerRunning = true;
}
else
{
Logger.Info("MediaFrameSource is null.");
await OnErrorAsync(PreviewError.MEDIA_FRAME_IS_NULL);
}
}
else
{
Logger.Info("MediaFrameReader creation failed with: No camera available.");
await OnErrorAsync(PreviewError.MEDIA_FRAME_NO_CAMERA);
}
}
private async Task InitializeCameraFrameReader()
{
var frameSourceGroups = await MediaFrameSourceGroup.FindAllAsync();
MediaFrameSourceGroup selectedGroup = null;
MediaFrameSourceInfo colorSourceInfo = null;
foreach (var sourceGroup in frameSourceGroups)
{
foreach (var sourceInfo in sourceGroup.SourceInfos)
{
if (sourceInfo.MediaStreamType == MediaStreamType.VideoPreview &&
sourceInfo.SourceKind == MediaFrameSourceKind.Color)
{
colorSourceInfo = sourceInfo;
break;
}
}
if (colorSourceInfo != null)
{
selectedGroup = sourceGroup;
break;
}
}
var colorFrameSource = CameraCapture.FrameSources[colorSourceInfo.Id];
CaptureWidth = (int)colorFrameSource.CurrentFormat.VideoFormat.Width;
CaptureHeight = (int)colorFrameSource.CurrentFormat.VideoFormat.Height;
CameraFrameReader = await CameraCapture.CreateFrameReaderAsync(colorFrameSource);
await CameraFrameReader.StartAsync();
}
private async Task InitializeCameraFrameReader()
{
var frameSourceGroups = await MediaFrameSourceGroup.FindAllAsync();
MediaFrameSourceGroup selectedGroup = null;
MediaFrameSourceInfo colorSourceInfo = null;
foreach (var sourceGroup in frameSourceGroups)
{
foreach (var sourceInfo in sourceGroup.SourceInfos)
{
if (sourceInfo.MediaStreamType == MediaStreamType.VideoPreview &&
sourceInfo.SourceKind == MediaFrameSourceKind.Color)
{
colorSourceInfo = sourceInfo;
break;
}
}
if (colorSourceInfo != null)
{
selectedGroup = sourceGroup;
break;
}
}
var colorFrameSource = CameraCapture.FrameSources[colorSourceInfo.Id];
var preferredFormat = colorFrameSource.SupportedFormats.Where(format => {
return(format.Subtype == MediaEncodingSubtypes.Argb32);
}).FirstOrDefault();
CameraFrameReader = await CameraCapture.CreateFrameReaderAsync(colorFrameSource);
await CameraFrameReader.StartAsync();
}
//********************************************************
// LEFTSIDE, LEFTFRONT, RIGHTSIDE, RIGHTFRONT CAPTURE
//********************************************************
public async Task <string> StartFourCamerasCapture()
{
leftSideBytes = new byte[480 * 160 * 4];
leftSideCapture = new MediaCapture();
try
{
await leftSideCapture.InitializeAsync(
new MediaCaptureInitializationSettings()
{
SourceGroup = depthGroup,
SharingMode = MediaCaptureSharingMode.SharedReadOnly,
MemoryPreference = MediaCaptureMemoryPreference.Cpu,
StreamingCaptureMode = StreamingCaptureMode.Video
}
);
}
catch (Exception ex)
{
return(null);
}
var colorFrameSource = depthNearCapture.FrameSources[leftSideInfo.Id];
var preferredFormat = colorFrameSource.SupportedFormats.FirstOrDefault();
await colorFrameSource.SetFormatAsync(preferredFormat);
leftSideFrameReader = await depthNearCapture.CreateFrameReaderAsync(colorFrameSource, MediaEncodingSubtypes.Argb32);
leftSideFrameReader.FrameArrived += leftSideFrameReader_FrameArrived;
await leftSideFrameReader.StartAsync();
return(null);
}
//********************************************************
// DEPTH NEAR CAPTURE
//********************************************************
public async Task <string> StartDepthNearCapture()
{
depthNearBytes = new byte[450 * 448 * 2];
depthNearCapture = new MediaCapture();
try
{
await depthNearCapture.InitializeAsync(
new MediaCaptureInitializationSettings()
{
SourceGroup = depthGroup,
SharingMode = MediaCaptureSharingMode.SharedReadOnly,
MemoryPreference = MediaCaptureMemoryPreference.Cpu,
StreamingCaptureMode = StreamingCaptureMode.Video
}
);
}
catch (Exception ex)
{
return(null);
}
var depthFrameSource = depthNearCapture.FrameSources[depthNearInfo.Id];
var preferredFormat = depthFrameSource.SupportedFormats.FirstOrDefault();
await depthFrameSource.SetFormatAsync(preferredFormat);
depthNearFrameReader = await depthNearCapture.CreateFrameReaderAsync(depthFrameSource, MediaEncodingSubtypes.D16);
depthNearFrameReader.FrameArrived += DepthNearFrameReader_FrameArrived;
await depthNearFrameReader.StartAsync();
return(null);
}
/// <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;
}
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));
}
public IAsyncOperation <MediaFrameReaderStartStatus> OpenAsync()
{
return(Task.Run(async() =>
{
if (!_isStarted)
{
if (_depthReader != null)
{
var status = await _depthReader.StartAsync();
if (status == MediaFrameReaderStartStatus.Success)
{
_depthReader.FrameArrived += DepthReader_FrameArrived;
_isStarted = true;
}
return status;
}
else
{
var response = await _networkClient.SendCommandAsync(new OpenReader(ReaderType.Depth, ReaderConfig.Default));
if (response.Status == OperationStatus.ResponseSuccess)
{
_networkClient.DepthFrameArrived += NetworkClient_DepthFrameArrived;
_isStarted = true;
}
return response.Status.ToMediaReaderStartStatus();
}
}
return MediaFrameReaderStartStatus.Success;
}).AsAsyncOperation());
}
// Create and initialze the MediaCapture object.
public async Task CaptureImageAsync()
{
autoStopCamera = new System.Timers.Timer(500);
autoStopCamera.Elapsed += AutoStopCamera;
frameQueue = new List <SoftwareBitmap>( );
var cameraName = "Surface Camera Front";
var frameSourceGroup = await MediaFrameSourceGroup.FindAllAsync( );
Debug.WriteLine($"frameSourceGroup = {frameSourceGroup}");
var cameraGroup = frameSourceGroup.FirstOrDefault(fg => fg.DisplayName == cameraName);
Debug.WriteLine($"cameraGroup = {cameraGroup}");
var mediaCapture = new MediaCapture( );
var settings = new MediaCaptureInitializationSettings( )
{
SourceGroup = cameraGroup,
SharingMode = MediaCaptureSharingMode.ExclusiveControl,
MemoryPreference = MediaCaptureMemoryPreference.Cpu,
StreamingCaptureMode = StreamingCaptureMode.Video,
};
await mediaCapture.InitializeAsync(settings);
var exposureSuccess = mediaCapture.VideoDeviceController.Exposure.TrySetAuto(true);
var brightnessSuccess = mediaCapture.VideoDeviceController.Brightness.TrySetAuto(true);
var currExposureSuccess = mediaCapture.VideoDeviceController.Exposure.TryGetValue(out double expValue);
var currBrightnessSuccess = mediaCapture.VideoDeviceController.Brightness.TryGetValue(out double brightValue);
Debug.WriteLine($"exposureSuccess: {exposureSuccess}");
Debug.WriteLine($"brightnessSuccess: {brightnessSuccess}");
Debug.WriteLine($"expValue: {expValue}");
Debug.WriteLine($"brightValue: {brightValue}");
var sourceInfoId = cameraGroup?.SourceInfos?.FirstOrDefault( )?.Id;
var mediaFrameSource = (mediaCapture?.FrameSources?.ContainsKey(sourceInfoId) ?? false) ? mediaCapture.FrameSources[sourceInfoId] : null;
var preferredFormat = mediaFrameSource.SupportedFormats.Where(format =>
{
return(format.VideoFormat.Width >= 1080);
//&& format.Subtype == "NV12";
}).FirstOrDefault( );
if (preferredFormat == null)
{
// Our desired format is not supported
return;
}
await mediaFrameSource.SetFormatAsync(preferredFormat);
frameReader?.Dispose( );
frameReader = await mediaCapture.CreateFrameReaderAsync(mediaFrameSource);
frameReader.FrameArrived += FrameReaderOnFrameArrived;
await frameReader.StartAsync( );
autoStopCamera.Start( );
}
private async Task InitMediaSourceAsync()
{
var allGroups = await MediaFrameSourceGroup.FindAllAsync();
if (allGroups.Count == 0)
{
Debug.LogError("cannot found MediaFrameSourceGroup. アプリケーションマニュフェストを確認してください。");
return;
}
MediaFrameSourceGroup sourceGroup =
allGroups.FirstOrDefault(g => g.SourceInfos.Any(s => s.SourceKind == MediaFrameSourceKind.Depth));
if (sourceGroup == null)
{
Debug.LogError("深度カメラが見つからないようです。");
return;
}
try
{
await InitializeMediaCaptureAsync(sourceGroup);
}
catch (Exception exception)
{
Debug.LogError("InitializeMediaCaptureAsyncに失敗しました" + exception.Message);
await CleanupMediaCaptureAsync();
return;
}
MediaFrameSource source = _mediaCapture.FrameSources.Values
.FirstOrDefault(s => s.Info.SourceKind == MediaFrameSourceKind.Depth);
if (source == null)
{
Debug.LogError("sourceが見つかりません。");
}
MediaFrameFormat format = source.SupportedFormats.FirstOrDefault(f =>
String.Equals(f.Subtype, MediaEncodingSubtypes.D16, StringComparison.OrdinalIgnoreCase));
if (format == null)
{
return;
}
await source.SetFormatAsync(format);
_depthReader = await _mediaCapture.CreateFrameReaderAsync(source, format.Subtype);
MediaFrameReaderStartStatus status = await _depthReader.StartAsync();
if (status != MediaFrameReaderStartStatus.Success)
{
Debug.LogError("_depthReader.StartAsyncに失敗しました");
}
}
private async void MainPage_OnLoaded(object sender, RoutedEventArgs e)
{
displayRequest.RequestActive();
try
{
var(colorSourceInfo, selectedGroup) = await MediaFrameSourceInfo();
if (selectedGroup == null)
{
return;
}
mediaCapture = new MediaCapture();
await mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings
{
SourceGroup = selectedGroup,
SharingMode = MediaCaptureSharingMode.ExclusiveControl,
MemoryPreference = MediaCaptureMemoryPreference.Cpu,
StreamingCaptureMode = StreamingCaptureMode.Video
});
var colorFrameSource = mediaCapture.FrameSources[colorSourceInfo.Id];
var preferredFormat = colorFrameSource.SupportedFormats.FirstOrDefault(format =>
format.VideoFormat.Width == targetWidth &&
string.Compare(format.Subtype, MediaEncodingSubtypes.Nv12, true) == 0);
if (preferredFormat == null)
{
// Our desired format is not supported
return;
}
await colorFrameSource.SetFormatAsync(preferredFormat);
mediaFrameReader = await mediaCapture.CreateFrameReaderAsync(colorFrameSource, MediaEncodingSubtypes.Nv12);
await mediaFrameReader.StartAsync();
Task.Run(() => ProcessPreview(mediaFrameReader));
}
catch (UnauthorizedAccessException)
{
// This will be thrown if the user denied access to the camera in privacy settings
return;
}
try
{
CameraPreview.Source = mediaCapture;
await mediaCapture.StartPreviewAsync();
}
catch (System.IO.FileLoadException)
{
}
}
/// <summary>
/// Method to start capturing camera frames at desired resolution.
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
public async Task InitializeMediaFrameReaderAsync(uint width = 224, uint height = 224)
{
// Check state of media capture object
if (_mediaCapture == null || _mediaCapture.CameraStreamState == CameraStreamState.Shutdown || _mediaCapture.CameraStreamState == CameraStreamState.NotStreaming)
{
if (_mediaCapture != null)
{
_mediaCapture.Dispose();
}
// Find right camera settings and prefer back camera
MediaCaptureInitializationSettings settings = new MediaCaptureInitializationSettings();
var allCameras = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
Debug.Log($"InitializeMediaFrameReaderAsync: allCameras: {allCameras}");
var selectedCamera = allCameras.FirstOrDefault(c => c.EnclosureLocation?.Panel == Panel.Back) ?? allCameras.FirstOrDefault();
Debug.Log($"InitializeMediaFrameReaderAsync: selectedCamera: {selectedCamera}");
if (selectedCamera != null)
{
settings.VideoDeviceId = selectedCamera.Id;
Debug.Log($"InitializeMediaFrameReaderAsync: settings.VideoDeviceId: {settings.VideoDeviceId}");
}
// Init capturer and Frame reader
_mediaCapture = new MediaCapture();
Debug.Log("InitializeMediaFrameReaderAsync: Successfully created media capture object.");
await _mediaCapture.InitializeAsync(settings);
Debug.Log("InitializeMediaFrameReaderAsync: Successfully initialized media capture object.");
var frameSource = _mediaCapture.FrameSources.Where(source => source.Value.Info.SourceKind == MediaFrameSourceKind.Color).First();
Debug.Log($"InitializeMediaFrameReaderAsync: frameSource: {frameSource}.");
// Convert the pixel formats
var subtype = MediaEncodingSubtypes.Bgra8;
// The overloads of CreateFrameReaderAsync with the format arguments will actually make a copy in FrameArrived
BitmapSize outputSize = new BitmapSize {
Width = width, Height = height
};
_mediaFrameReader = await _mediaCapture.CreateFrameReaderAsync(frameSource.Value, subtype, outputSize);
Debug.Log("InitializeMediaFrameReaderAsync: Successfully created media frame reader.");
_mediaFrameReader.AcquisitionMode = MediaFrameReaderAcquisitionMode.Realtime;
await _mediaFrameReader.StartAsync();
Debug.Log("InitializeMediaFrameReaderAsync: Successfully started media frame reader.");
IsCapturing = true;
}
}
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
App.dispatcher = this.Dispatcher;
Cv2.InitContainer((object)App.container);
//_helper.SetContainer(App.container);
rootPage = MainPage.Current;
// setting up the combobox, and default operation
OperationComboBox.ItemsSource = Enum.GetValues(typeof(OperationType));
OperationComboBox.SelectedIndex = 0;
currentOperation = OperationType.Blur;
// Find the sources
var allGroups = await MediaFrameSourceGroup.FindAllAsync();
var sourceGroups = allGroups.Select(g => new
{
Group = g,
SourceInfo = g.SourceInfos.FirstOrDefault(i => i.SourceKind == MediaFrameSourceKind.Color)
}).Where(g => g.SourceInfo != null).ToList();
if (sourceGroups.Count == 0)
{
// No camera sources found
return;
}
var selectedSource = sourceGroups.FirstOrDefault();
// Initialize MediaCapture
try
{
await InitializeMediaCaptureAsync(selectedSource.Group);
}
catch (Exception exception)
{
Debug.WriteLine("MediaCapture initialization error: " + exception.Message);
await CleanupMediaCaptureAsync();
return;
}
// Create the frame reader
MediaFrameSource frameSource = _mediaCapture.FrameSources[selectedSource.SourceInfo.Id];
BitmapSize size = new BitmapSize() // Choose a lower resolution to make the image processing more performant
{
Height = IMAGE_ROWS,
Width = IMAGE_COLS
};
_reader = await _mediaCapture.CreateFrameReaderAsync(frameSource, MediaEncodingSubtypes.Bgra8, size);
_reader.FrameArrived += ColorFrameReader_FrameArrivedAsync;
await _reader.StartAsync();
_FPSTimer.Start();
}
public static async Task <VideoFrameProcessor> CreateAsync()
{
IReadOnlyList <MediaFrameSourceGroup> groups = await MediaFrameSourceGroup.FindAllAsync();
MediaFrameSourceGroup selectedGroup = null;
MediaFrameSourceInfo selectedSourceInfo = null;
// Pick first color source.
foreach (var sourceGroup in groups)
{
foreach (var sourceInfo in sourceGroup.SourceInfos)
{
if (sourceInfo.MediaStreamType == MediaStreamType.VideoPreview &&
sourceInfo.SourceKind == MediaFrameSourceKind.Color)
{
selectedSourceInfo = sourceInfo;
break;
}
}
if (selectedSourceInfo != null)
{
selectedGroup = sourceGroup;
break;
}
}
// No valid camera was found. This will happen on the emulator.
if (selectedGroup == null || selectedSourceInfo == null)
{
return(null);
}
MediaCaptureInitializationSettings settings = new MediaCaptureInitializationSettings();
settings.MemoryPreference = MediaCaptureMemoryPreference.Cpu; // Need SoftwareBitmaps for FaceAnalysis
settings.StreamingCaptureMode = StreamingCaptureMode.Video; // Only need to stream video
settings.SourceGroup = selectedGroup;
MediaCapture mediaCapture = new MediaCapture();
await mediaCapture.InitializeAsync(settings);
MediaFrameSource selectedSource = mediaCapture.FrameSources[selectedSourceInfo.Id];
MediaFrameReader reader = await mediaCapture.CreateFrameReaderAsync(selectedSource);
MediaFrameReaderStartStatus status = await reader.StartAsync();
// Only create a VideoFrameProcessor if the reader successfully started
if (status == MediaFrameReaderStartStatus.Success)
{
return(new VideoFrameProcessor(mediaCapture, reader, selectedSource));
}
return(null);
}
//#############################################################################################
/// <summary>
/// Start video capture.
/// By default, if the callback is enabled, _imageElement is updated.
/// </summary>
public async Task Start()
{
if (!_running)
{
// create and start the reader
_mediaFrameReader = await _mediaCapture.CreateFrameReaderAsync(_frameSource, MediaEncodingSubtypes.Argb32);
await _mediaFrameReader.StartAsync();
_running = true;
}
}
public async Task StartPreviewAsync()
{
#if WINDOWS_UWP
var frameSourceGroups = await MediaFrameSourceGroup.FindAllAsync();
MediaFrameSourceGroup selectedGroup = null;
MediaFrameSourceInfo colorSourceInfo = null;
foreach (var sourceGroup in frameSourceGroups)
{
foreach (var sourceInfo in sourceGroup.SourceInfos)
{
if (sourceInfo.MediaStreamType == MediaStreamType.VideoRecord &&
sourceInfo.SourceKind == MediaFrameSourceKind.Color)
{
colorSourceInfo = sourceInfo;
break;
}
}
if (colorSourceInfo != null)
{
selectedGroup = sourceGroup;
break;
}
}
var settings = new MediaCaptureInitializationSettings()
{
SourceGroup = selectedGroup,
SharingMode = MediaCaptureSharingMode.ExclusiveControl,
MemoryPreference = MediaCaptureMemoryPreference.Auto,
StreamingCaptureMode = StreamingCaptureMode.Video
};
try
{
mediaCapture = new MediaCapture();
await mediaCapture.InitializeAsync(settings);
var colorFrameSource = mediaCapture.FrameSources[colorSourceInfo.Id];
mediaFrameReader = await mediaCapture.CreateFrameReaderAsync(colorFrameSource, MediaEncodingSubtypes.Argb32);
mediaFrameReader.FrameArrived += ColorFrameReader_FrameArrived;
await mediaFrameReader.StartAsync();
isPreviewing = true;
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("MediaCapture initialization failed: " + ex.Message);
return;
}
#endif
}
/// <summary>
/// Starts the video pipeline and frame reading.
/// </summary>
/// <returns>Whether the frame reader is successfully started</returns>
private async Task <bool> StartFrameReaderAsyncTask()
{
MediaFrameReaderStartStatus mediaFrameReaderStartStatus = await _frameReader.StartAsync();
if (mediaFrameReaderStartStatus == MediaFrameReaderStartStatus.Success)
{
_logger.Log("Started Frame reader");
return(true);
}
_logger.LogError($"Could not start frame reader, status: {mediaFrameReaderStartStatus}");
return(false);
}
/// <summary>
/// Video Capture: Initialize Camera Capture.
/// Implementation is from the UWP official tutorial.
/// https://docs.microsoft.com/en-us/windows/uwp/audio-video-camera/process-media-frames-with-mediaframereader
/// </summary>
public async void InitializeCamera()
{
var frameSourceGroups = await MediaFrameSourceGroup.FindAllAsync();
var selectedGroupObjects = frameSourceGroups.Select(group =>
new
{
sourceGroup = group,
colorSourceInfo = group.SourceInfos.FirstOrDefault((sourceInfo) =>
{
// On Xbox/Kinect, omit the MediaStreamType and EnclosureLocation tests
return(sourceInfo.SourceKind == MediaFrameSourceKind.Color);
})
}).Where(t => t.colorSourceInfo != null)
.FirstOrDefault();
MediaFrameSourceGroup selectedGroup = selectedGroupObjects?.sourceGroup;
MediaFrameSourceInfo colorSourceInfo = selectedGroupObjects?.colorSourceInfo;
if (selectedGroup == null)
{
return;
}
mediaCapture = new MediaCapture();
var settings = new MediaCaptureInitializationSettings()
{
SourceGroup = selectedGroup,
SharingMode = MediaCaptureSharingMode.ExclusiveControl,
MemoryPreference = MediaCaptureMemoryPreference.Cpu,
StreamingCaptureMode = StreamingCaptureMode.Video
};
try
{
await mediaCapture.InitializeAsync(settings);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("MediaCapture initialization failed: " + ex.Message);
return;
}
var colorFrameSource = mediaCapture.FrameSources[colorSourceInfo.Id];
mediaFrameReader = await mediaCapture.CreateFrameReaderAsync(colorFrameSource, MediaEncodingSubtypes.Argb32);
mediaFrameReader.FrameArrived += ColorFrameReader_FrameArrived;
await mediaFrameReader.StartAsync();
}
/// <summary>
/// カメラプレビューを開始する
/// </summary>
/// <param name="IsCapturedHologram"></param>
public async Task <bool> StartVideoModeAsync(bool IsCapturedHologram)
{
// MediaFrameSourceを取得する
// MediaFrameSourceはMediaFrameSourceGroupから直接取得することはできず
// MediaCapture経由で取得する必要がある
var mediaFrameSource = _mediaCapture.FrameSources[_frameSourceInfo.Id];
if (mediaFrameSource == null)
{
return(false);
}
// Unityのテクスチャに変換できるフォーマットを指定
var pixelFormat = MediaEncodingSubtypes.Bgra8;
// MediaFrameReaderの作成
_frameReader = await _mediaCapture.CreateFrameReaderAsync(mediaFrameSource, pixelFormat);
// フレームを取得したときのイベントハンドラ
_frameReader.FrameArrived += HandleFrameArrived;
// フレームの取得を開始する
var result = await _frameReader.StartAsync();
// デバイスがサポートするビデオフォーマットの一覧を取得する
// ここではHoloLensがサポートする896x504 30fpsに絞って取得している
var allPropertySets = _mediaCapture.VideoDeviceController.GetAvailableMediaStreamProperties(MediaStreamType.VideoPreview)
.Select(x => x as VideoEncodingProperties)
.Where(x =>
{
if (x == null)
{
return(false);
}
if (x.FrameRate.Denominator == 0)
{
return(false);
}
double frameRate = (double)x.FrameRate.Numerator / (double)x.FrameRate.Denominator;
return(x.Width == 896 && x.Height == 504 && (int)Math.Round(frameRate) == 30);
});
// 取得したフォーマット情報を使ってキャプチャするフレームの解像度とFPSを設定する
VideoEncodingProperties properties = allPropertySets.FirstOrDefault();
await _mediaCapture.VideoDeviceController.SetMediaStreamPropertiesAsync(MediaStreamType.VideoPreview, properties);
// Mixed Reality Captureの設定
IVideoEffectDefinition ved = new MixedRealityCaptureSetting(IsCapturedHologram, false, 0, IsCapturedHologram ? 0.9f : 0.0f);
await _mediaCapture.AddVideoEffectAsync(ved, MediaStreamType.VideoPreview);
return(true);
}
private async void InitAudioFrameReader()
{
//<SnippetInitAudioFrameSource>
mediaCapture = new MediaCapture();
MediaCaptureInitializationSettings settings = new MediaCaptureInitializationSettings()
{
StreamingCaptureMode = StreamingCaptureMode.Audio,
};
await mediaCapture.InitializeAsync(settings);
var audioFrameSources = mediaCapture.FrameSources.Where(x => x.Value.Info.MediaStreamType == MediaStreamType.Audio);
if (audioFrameSources.Count() == 0)
{
Debug.WriteLine("No audio frame source was found.");
return;
}
MediaFrameSource frameSource = audioFrameSources.FirstOrDefault().Value;
MediaFrameFormat format = frameSource.CurrentFormat;
if (format.Subtype != MediaEncodingSubtypes.Float)
{
return;
}
if (format.AudioEncodingProperties.ChannelCount != 1 ||
format.AudioEncodingProperties.SampleRate != 48000)
{
return;
}
//</SnippetInitAudioFrameSource>
//<SnippetCreateAudioFrameReader>
mediaFrameReader = await mediaCapture.CreateFrameReaderAsync(frameSource);
// Optionally set acquisition mode. Buffered is the default mode for audio.
mediaFrameReader.AcquisitionMode = MediaFrameReaderAcquisitionMode.Buffered;
mediaFrameReader.FrameArrived += MediaFrameReader_AudioFrameArrived;
var status = await mediaFrameReader.StartAsync();
if (status != MediaFrameReaderStartStatus.Success)
{
Debug.WriteLine("The MediaFrameReader couldn't start.");
}
//</SnippetCreateAudioFrameReader>
}
public async void InitializeManager()
{
_helper = new OpenCVHelper();
// Find the sources
var allGroups = await MediaFrameSourceGroup.FindAllAsync();
var sourceGroups = allGroups.Select(g => new
{
Group = g,
SourceInfo = g.SourceInfos.FirstOrDefault(i => i.SourceKind == MediaFrameSourceKind.Color)
}).Where(g => g.SourceInfo != null).ToList();
if (sourceGroups.Count == 0)
{
// No camera sources found
return;
}
var selectedSource = sourceGroups.FirstOrDefault();
// Initialize MediaCapture
try
{
await InitializeMediaCaptureAsync(selectedSource.Group);
}
catch (Exception exception)
{
Debug.WriteLine("MediaCapture initialization error: " + exception.Message);
await CleanupMediaCaptureAsync();
return;
}
// Create the frame reader
MediaFrameSource frameSource = _mediaCapture.FrameSources[selectedSource.SourceInfo.Id];
var format = frameSource.SupportedFormats.OrderByDescending(x => x.VideoFormat.Width * x.VideoFormat.Height).FirstOrDefault();
await frameSource.SetFormatAsync(format);
BitmapSize size = new BitmapSize() // Choose a lower resolution to make the image processing more performant
{
Height = format.VideoFormat.Height,
Width = format.VideoFormat.Width
};
_reader = await _mediaCapture.CreateFrameReaderAsync(frameSource, MediaEncodingSubtypes.Bgra8, size);
_reader.FrameArrived += HandleFrameArrive;
await _reader.StartAsync();
}
public async void Initialize()
{
var sourceGroups = await MediaFrameSourceGroup.FindAllAsync();
var desiredGroupInfo = sourceGroups.Select(sourceGroup => new
{
Group = sourceGroup,
Info = sourceGroup.SourceInfos.FirstOrDefault(info => info.MediaStreamType == MediaStreamType.VideoPreview && info.SourceKind == MediaFrameSourceKind.Color)
}).FirstOrDefault(groupInfo => groupInfo.Info != null);
if (desiredGroupInfo == null)
{
return;
}
var settings = new MediaCaptureInitializationSettings()
{
SourceGroup = desiredGroupInfo.Group,
SharingMode = MediaCaptureSharingMode.ExclusiveControl,
MemoryPreference = MediaCaptureMemoryPreference.Auto,
StreamingCaptureMode = StreamingCaptureMode.Video
};
await mediaCapture.InitializeAsync(settings);
var frameSource = mediaCapture.FrameSources[desiredGroupInfo.Info.Id];
var preferredFormat = frameSource.SupportedFormats
.OrderByDescending(format => format.VideoFormat.Width)
.ThenByDescending(format => (float)format.FrameRate.Numerator / format.FrameRate.Denominator)
.FirstOrDefault();
if (preferredFormat == null)
{
return;
}
await frameSource.SetFormatAsync(preferredFormat);
var cameraController = frameSource.Controller.VideoDeviceController;
cameraController.WhiteBalance.TrySetAuto(false);
cameraController.WhiteBalance.TrySetValue(2600);
cameraController.Exposure.TrySetAuto(false);
cameraController.Exposure.TrySetValue(5.0);
cameraController.BacklightCompensation.TrySetAuto(false);
cameraController.DesiredOptimization = Windows.Media.Devices.MediaCaptureOptimization.Quality;
mediaFrameReader = await mediaCapture.CreateFrameReaderAsync(frameSource);
mediaFrameReader.FrameArrived += OnFrameArrived;
await mediaFrameReader.StartAsync();
}
