public async Task <SoftwareBitmap> GetCaptureAsync()
{
var d2d = swapChain.GetBackBuffer <SharpDX.Direct3D11.Texture2D>(0);
var frame = Direct3D11Helper.CreateDirect3DSurfaceFromSharpDXTexture(d2d);
return(await SoftwareBitmap.CreateCopyFromSurfaceAsync(frame));
}
private async void _onFrameArraved()
{
TimeSpan _lastTimeStamp = _startTime;
while (_capturing)
{
QueryPerformanceCounter(out long start);
using (var frame = _framePool.TryGetNextFrame())
{
if (frame == null)
{
continue;
}
using (var bitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(frame.Surface, BitmapAlphaMode.Premultiplied))
{
_processBitmap(bitmap, frame.SystemRelativeTime - _lastTimeStamp);
_lastTimeStamp = frame.SystemRelativeTime;
}
}
QueryPerformanceCounter(out long end);
var spendTime = TimeSpan.FromTicks(end - start);
if (spendTime < TimeSpan.FromMilliseconds(41))
{
await Task.Delay((TimeSpan.FromMilliseconds(41) - spendTime).Milliseconds);
}
}
_seesion.Dispose();
_framePool.Dispose();
_mediaEncoder.CloseVideoWriter();
}
public void CanvasBitmap_CreateFromSoftwareBitmap_Roundtrip()
{
var colors = new Color[]
{
Colors.Red, Colors.Green, Colors.Yellow,
Colors.Green, Colors.Yellow, Colors.Red,
Colors.Yellow, Colors.Red, Colors.Green
};
float anyDpi = 10;
var device = new CanvasDevice(true);
var originalBitmap = CanvasBitmap.CreateFromColors(device, colors, 3, 3, anyDpi);
var softwareBitmap = SoftwareBitmap.CreateCopyFromSurfaceAsync(originalBitmap, BitmapAlphaMode.Premultiplied).AsTask().Result;
softwareBitmap.DpiX = anyDpi;
softwareBitmap.DpiY = anyDpi;
var roundtrippedBitmap = CanvasBitmap.CreateFromSoftwareBitmap(device, softwareBitmap);
Assert.AreEqual(originalBitmap.Format, roundtrippedBitmap.Format);
Assert.AreEqual(anyDpi, roundtrippedBitmap.Dpi);
var roundtrippedColors = roundtrippedBitmap.GetPixelColors();
Assert.AreEqual(colors.Length, roundtrippedColors.Length);
for (var i = 0; i < colors.Length; ++i)
{
Assert.AreEqual(colors[i], roundtrippedColors[i]);
}
}
public static unsafe SoftwareBitmap ConvertToImageAsync(VideoMediaFrame input)
{
if (input != null)
{
var inputBitmap = input.SoftwareBitmap;
var surface = input.Direct3DSurface;
try
{
if (surface != null)
{
inputBitmap = SoftwareBitmap.CreateCopyFromSurfaceAsync(surface, BitmapAlphaMode.Ignore).AsTask().GetAwaiter().GetResult();
}
if (inputBitmap != null)
{
return(SoftwareBitmap.Convert(inputBitmap, BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore));
}
}
finally
{
inputBitmap?.Dispose();
surface?.Dispose();
}
}
return(null);
}
/// <summary>
/// Run the skill against the frame passed as parameter
/// </summary>
/// <param name="frame"></param>
/// <returns></returns>
private async Task RunSkillAsync(VideoFrame frame)
{
// Update input image and run the skill against it
await m_paramsSkillObj.m_binding.SetInputImageAsync(frame);
// Evaluate skill
await m_paramsSkillObj.m_skill.EvaluateAsync(m_paramsSkillObj.m_binding);
VideoFrame superResOutput = null;
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
// Retrieve result and display
superResOutput = await m_paramsSkillObj.m_binding.GetOutputImageAsync();
if (superResOutput.SoftwareBitmap == null)
{
SoftwareBitmap softwareBitmapOut = await SoftwareBitmap.CreateCopyFromSurfaceAsync(superResOutput.Direct3DSurface);
softwareBitmapOut = SoftwareBitmap.Convert(softwareBitmapOut, BitmapPixelFormat.Bgra8, BitmapAlphaMode.Premultiplied);
await m_bitmapSource.SetBitmapAsync(softwareBitmapOut);
UIOutputViewer.Source = m_bitmapSource;
}
else
{
await m_bitmapSource.SetBitmapAsync(superResOutput.SoftwareBitmap);
UIOutputViewer.Source = m_bitmapSource;
}
});
}
/// <summary>
/// Pass the input frame to a frame renderer and ensure proper image format is used
/// </summary>
/// <param name="inputVideoFrame"></param>
/// <param name="useDX"></param>
/// <returns></returns>
public static IAsyncAction RenderFrameAsync(FrameRenderer frameRenderer, VideoFrame inputVideoFrame)
{
return(AsyncInfo.Run(async(token) =>
{
bool useDX = inputVideoFrame.SoftwareBitmap == null;
if (frameRenderer == null)
{
throw (new InvalidOperationException("FrameRenderer is null"));
}
SoftwareBitmap softwareBitmap = null;
if (useDX)
{
softwareBitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(inputVideoFrame.Direct3DSurface);
softwareBitmap = SoftwareBitmap.Convert(softwareBitmap, BitmapPixelFormat.Bgra8, BitmapAlphaMode.Premultiplied);
}
else
{
/*
* softwareBitmap = inputVideoFrame.SoftwareBitmap;
* softwareBitmap = new SoftwareBitmap(
* inputVideoFrame.SoftwareBitmap.BitmapPixelFormat,
* inputVideoFrame.SoftwareBitmap.PixelWidth,
* inputVideoFrame.SoftwareBitmap.PixelHeight,
* inputVideoFrame.SoftwareBitmap.BitmapAlphaMode);
* inputVideoFrame.SoftwareBitmap.CopyTo(softwareBitmap);*/
softwareBitmap = SoftwareBitmap.Convert(inputVideoFrame.SoftwareBitmap, BitmapPixelFormat.Bgra8, BitmapAlphaMode.Premultiplied);
}
frameRenderer.RenderFrame(softwareBitmap);
}));
}
private async void OnFrameArrived(Direct3D11CaptureFramePool sender, object args)
{
_currentFrame = sender.TryGetNextFrame();
BarcodeReader reader = new BarcodeReader();
reader.AutoRotate = true;
reader.Options.TryHarder = true;
reader.Options.PureBarcode = false;
reader.Options.PossibleFormats = new List <BarcodeFormat>();
reader.Options.PossibleFormats.Add(BarcodeFormat.QR_CODE);
var bitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(_currentFrame.Surface).AsTask();
var result = reader.Decode(bitmap);
if (!string.IsNullOrEmpty(result?.Text) && (result.Text.StartsWith("suavekeys|expression") || result.Text.StartsWith("suavekeys|gesture")))
{
Debug.WriteLine("WOOHOO WE FOUND A CODE");
if (!_isSending)
{
_isSending = true;
var command = result.Text.Split('|')[2];
await _suaveKeysService.SendCommandAsync(command);
_isSending = false;
}
}
_frameEvent.Set();
}
private async Task NextFrame()
{
mediaPlayer.StepForwardOneFrame();
SoftwareBitmap frameServerDest = null;
SoftwareBitmap sb = null;
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
CanvasDevice canvasDevice = CanvasDevice.GetSharedDevice();
frameServerDest = new SoftwareBitmap(BitmapPixelFormat.Bgra8, (int)1200, (int)1200, BitmapAlphaMode.Premultiplied);
var canvasImageSource = new CanvasImageSource(canvasDevice, (int)1200, (int)1200, DisplayInformation.GetForCurrentView().LogicalDpi);//96);
using (CanvasBitmap inputBitmap = CanvasBitmap.CreateFromSoftwareBitmap(canvasDevice, frameServerDest))
using (CanvasDrawingSession ds = canvasImageSource.CreateDrawingSession(Windows.UI.Colors.Transparent))
{
mediaPlayer.CopyFrameToVideoSurface(inputBitmap);
ds.DrawImage(inputBitmap);
frameServerDest = SoftwareBitmap.CreateCopyFromSurfaceAsync(inputBitmap, BitmapAlphaMode.Premultiplied).AsTask().Result;
}
ImagePreview.Source = canvasImageSource;
});
VideoFrame inputImage = VideoFrame.CreateWithSoftwareBitmap(frameServerDest);
// Evaluate the image
await EvaluateVideoFrameAsync(inputImage);
}
/// <summary>
/// Render ObjectDetector skill results
/// </summary>
/// <param name="frame"></param>
/// <param name="objectDetections"></param>
/// <returns></returns>
private async Task RenderResultsAsync(VideoFrame frame, IReadOnlyList <ObjectDetectorResult> objectDetections)
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
try
{
if (frame.SoftwareBitmap != null)
{
await m_processedBitmapSource.SetBitmapAsync(frame.SoftwareBitmap);
}
else
{
var bitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(frame.Direct3DSurface, BitmapAlphaMode.Ignore);
await m_processedBitmapSource.SetBitmapAsync(bitmap);
}
m_bboxRenderer.Render(objectDetections);
}
catch (TaskCanceledException)
{
// no-op: we expect this exception when we change media sources
// and can safely ignore/continue
}
catch (Exception ex)
{
NotifyUser($"Exception while rendering results: {ex.Message}");
}
});
}
public static async Task <SoftwareBitmap> GetSoftwareBitmapAsync(this CanvasCommandList canvasCommandList)
{
var offScreen = canvasCommandList.GetCanvasBitmap();
var bitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(offScreen, BitmapAlphaMode.Premultiplied);
offScreen.Dispose();
return(bitmap);
}
/**
* カレント位置のサムネイルを作成する。
*/
private async void createThumbnailCore()
{
if (mDoneOnce)
{
return;
}
mDoneOnce = true;
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
CanvasDevice canvasDevice = CanvasDevice.GetSharedDevice();
// Debug.WriteLine(mPlayerElement.MediaPlayer.PlaybackSession.Position);
double mw = mPlayerElement.MediaPlayer.PlaybackSession.NaturalVideoWidth, mh = mPlayerElement.MediaPlayer.PlaybackSession.NaturalVideoHeight;
var limit = Math.Min(Math.Max(mh, mw), 1024);
var playerSize = calcFittingSize(mw, mh, limit, limit);
var canvasImageSource = new CanvasImageSource(canvasDevice, (int)playerSize.Width, (int)playerSize.Height, DisplayInformation.GetForCurrentView().LogicalDpi);//96);
using (var frameServerDest = new SoftwareBitmap(BitmapPixelFormat.Rgba8, (int)playerSize.Width, (int)playerSize.Height, BitmapAlphaMode.Ignore))
using (CanvasBitmap canvasBitmap = CanvasBitmap.CreateFromSoftwareBitmap(canvasDevice, frameServerDest))
{
mPlayerElement.MediaPlayer.CopyFrameToVideoSurface(canvasBitmap);
// ↑これで、frameServerDest に描画されるのかと思ったが、このframeServerDestは、単に、空のCanvasBitmapを作るための金型であって、
// 実際の描画は、CanvasBitmap（IDirect3DSurface)に対してのみ行われ、frameServerDestはからBitmapを作っても、黒い画像しか取り出せない。
// このため、有効な画像を取り出すには、CangasBitmapから softwareBitmapを生成してエンコードする必要がある。
using (var softwareBitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(canvasBitmap))
{
var stream = new InMemoryRandomAccessStream();
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream);
encoder.SetSoftwareBitmap(softwareBitmap);
try
{
await encoder.FlushAsync();
}
catch (Exception e)
{
Debug.WriteLine(e);
stream.Dispose();
stream = null;
}
if (null != mOnSelected)
{
mOnSelected(this, mPlayerElement.MediaPlayer.PlaybackSession.Position.TotalMilliseconds, stream);
closeDialog();
}
else
{
stream.Dispose();
}
}
}
});
}
public static SKImage Direct3dToSKImage(IDirect3DSurface surface)
{
var task = SoftwareBitmap.CreateCopyFromSurfaceAsync(surface);
while (task.Status == AsyncStatus.Started)
{
Thread.Sleep(50);
}
using SoftwareBitmap bitmap = task.GetResults();
SKImage image = SoftwareBitmapToSKImage(bitmap);
return(image);
}
/// <summary>
/// Triggered when a new frame is available from the camera stream.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void FrameSource_FrameArrived(object sender, VideoFrame frame)
{
try
{
// Use a lock to process frames one at a time and bypass processing if busy
if (m_lock.Wait(0))
{
// Render incoming frame
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
await m_renderLock.WaitAsync();
if (frame.SoftwareBitmap != null)
{
await m_bitmapSource.SetBitmapAsync(frame.SoftwareBitmap);
}
else
{
var bitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(frame.Direct3DSurface, BitmapAlphaMode.Ignore);
await m_bitmapSource.SetBitmapAsync(bitmap);
}
m_renderLock.Release();
});
// Allign overlay canvas and camera preview so that the rendered rectangle looks right
if (!m_isCameraFrameDimensionInitialized || m_frameSource.FrameWidth != m_cameraFrameWidth || m_frameSource.FrameHeight != m_cameraFrameHeight)
{
m_cameraFrameWidth = m_frameSource.FrameWidth;
m_cameraFrameHeight = m_frameSource.FrameHeight;
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
UICameraPreview_SizeChanged(null, null);
});
m_isCameraFrameDimensionInitialized = true;
}
// Run the skill
await RunSkillAsync(frame);
m_lock.Release();
}
}
catch (Exception ex)
{
// Show the error
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () => NotifyUser(ex.Message, NotifyType.ErrorMessage));
m_lock.Release();
}
}
/// <summary>
/// Evaluates the frame for scene classification
/// </summary>
/// <param name="vf"></param>
/// <returns></returns>
private static async Task EvaluateFrameAsync(VideoFrame vf)
{
// Process 1 frame at a time, if busy return right away
if (0 == Interlocked.Exchange(ref m_lock, 1))
{
// Update input image and run the skill against it
await m_binding.SetInputImageAsync(vf);
await m_skill.EvaluateAsync(m_binding);
string outText = "";
if (!m_binding.IsFaceFound)
{
// if no face found, hide the rectangle in the UI
outText = "No face found";
}
else // Display the sentiment on the console
{
outText = "Your sentiment looks like: " + m_binding.PredominantSentiment.ToString();
var folder = await StorageFolder.GetFolderFromPathAsync(System.AppContext.BaseDirectory);
var file = await folder.CreateFileAsync(m_binding.PredominantSentiment.ToString() + "Face.jpg", CreationCollisionOption.ReplaceExisting);
using (IRandomAccessStream stream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream);
SoftwareBitmap sb;
if (vf.SoftwareBitmap == null)
{
sb = await SoftwareBitmap.CreateCopyFromSurfaceAsync(vf.Direct3DSurface);
}
else
{
sb = vf.SoftwareBitmap;
}
encoder.SetSoftwareBitmap(
sb.BitmapPixelFormat.Equals(BitmapPixelFormat.Bgra8) ? sb : SoftwareBitmap.Convert(sb, BitmapPixelFormat.Bgra8)
);
await encoder.FlushAsync();
}
}
Console.Write("\r" + outText + "\t\t\t\t\t");
// Release the lock
Interlocked.Exchange(ref m_lock, 0);
}
}
public static async Task <SoftwareBitmap> Render(RenderObjectBase[][] renderChain)
{
var sources = new List <RenderObjectBase>();
foreach (var layer in renderChain)
{
foreach (var item in layer)
{
sources.Add(item);
}
}
var width = sources.Max(x => x.Source.PixelWidth);
var height = sources.Max(x => x.Source.PixelHeight);
CanvasDevice device = new CanvasDevice();
CanvasRenderTarget render = new CanvasRenderTarget(device,
(float)width,
(float)height,
96);
using (var session = render.CreateDrawingSession())
{
CanvasBitmap cb;
ICanvasImage cbi;
// Проходим по слоям
foreach (var layer in renderChain)
{
foreach (var renderObject in layer)
{
cb = CanvasBitmap.CreateFromSoftwareBitmap(device, renderObject.Source);
cbi = new Transform2DEffect()
{
Source = cb,
TransformMatrix = renderObject.Transformaion
};
session.DrawImage(cbi);
}
}
}
return(SoftwareBitmap.Convert(
await SoftwareBitmap.CreateCopyFromSurfaceAsync(render),
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Premultiplied
));
}
public static async Task <SoftwareBitmap> RenderToSoftwareBitmap(ICanvasResourceCreatorWithDpi resourceCreator, TextRenderSettings settings)
{
var cbi = Render(resourceCreator, settings, true);
CanvasRenderTarget renderTarget = new CanvasRenderTarget(resourceCreator, cbi.Size);
using (var session = renderTarget.CreateDrawingSession())
{
session.DrawImage(cbi);
}
return(SoftwareBitmap.Convert(
await SoftwareBitmap.CreateCopyFromSurfaceAsync(renderTarget),
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Premultiplied
));
}
/// <summary>
/// Evaluate input image, process (inference) then bind to output
/// </summary>
/// <param name="binding"></param>
/// <returns></returns>
public IAsyncAction EvaluateAsync(ISkillBinding binding)
{
NeuralStyleTransformerBinding bindingObj = binding as NeuralStyleTransformerBinding;
if (bindingObj == null)
{
throw new ArgumentException("Invalid ISkillBinding parameter: This skill handles evaluation of NeuralStyleTransformerBinding instances only");
}
return(AsyncInfo.Run(async(token) =>
{
// Retrieve input frame from the binding object
VideoFrame inputFrame = (binding[NeuralStyleTransformerConst.SKILL_INPUTNAME_IMAGE].FeatureValue as SkillFeatureImageValue).VideoFrame;
SoftwareBitmap softwareBitmapInput = inputFrame.SoftwareBitmap;
// Retrieve a SoftwareBitmap to run face detection
if (softwareBitmapInput == null)
{
if (inputFrame.Direct3DSurface == null)
{
throw (new ArgumentNullException("An invalid input frame has been bound"));
}
softwareBitmapInput = await SoftwareBitmap.CreateCopyFromSurfaceAsync(inputFrame.Direct3DSurface);
}
// Retrieve output image from model
var transformedImage = binding[NeuralStyleTransformerConst.SKILL_OUTPUTNAME_IMAGE];
// Bind the WinML input frame
bindingObj.m_winmlBinding.Bind(
NeuralStyleTransformerConst.WINML_MODEL_INPUTNAME, // WinML feature name
inputFrame);
ImageFeatureValue outputImageFeatureValue = ImageFeatureValue.CreateFromVideoFrame(_outputFrame);
bindingObj.m_winmlBinding.Bind(NeuralStyleTransformerConst.WINML_MODEL_OUTPUTNAME, outputImageFeatureValue);
// Run WinML evaluation
var winMLEvaluationResult = await m_winmlSession.EvaluateAsync(bindingObj.m_winmlBinding, "0");
// Parse result
IReadOnlyDictionary <string, object> outputs = winMLEvaluationResult.Outputs;
foreach (var output in outputs)
{
Debug.WriteLine($"{output.Key} : {output.Value} -> {output.Value.GetType()}");
}
//set model output to skill output
await transformedImage.SetFeatureValueAsync(_outputFrame);
}));
}
public static async Task SaveToFileAsync(this VideoFrame videoFrame)
{
bool useDX = videoFrame.SoftwareBitmap == null;
SoftwareBitmap softwareBitmap = null;
if (useDX)
{
softwareBitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(videoFrame.Direct3DSurface);
}
else
{
softwareBitmap = videoFrame.SoftwareBitmap;
}
var savePicker = new FileSavePicker();
savePicker.DefaultFileExtension = ".png";
savePicker.FileTypeChoices.Add(".png", new List <string> {
".png"
});
savePicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
savePicker.SuggestedFileName = "snapshot.png";
// Prompt the user to select a file
var saveFile = await savePicker.PickSaveFileAsync();
// Verify the user selected a file
if (saveFile == null)
{
return;
}
// Encode the image to the selected file on disk
using (var fileStream = await saveFile.OpenAsync(FileAccessMode.ReadWrite))
{
var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, fileStream);
encoder.SetSoftwareBitmap(softwareBitmap);
await encoder.FlushAsync();
}
}
private void ProcessFrame(Direct3D11CaptureFrame frame)
{
// Resize and device-lost leverage the same function on the
// Direct3D11CaptureFramePool. Refactoring it this way avoids
// throwing in the catch block below (device creation could always
// fail) along with ensuring that resize completes successfully and
// isn’t vulnerable to device-lost.
bool needsReset = false;
bool recreateDevice = false;
if ((frame.ContentSize.Width != _lastSize.Width) ||
(frame.ContentSize.Height != _lastSize.Height))
{
needsReset = true;
_lastSize = frame.ContentSize;
}
try
{
bitmap = SoftwareBitmap.CreateCopyFromSurfaceAsync(frame.Surface).GetResults();
byte[] imageBytes = new byte[4 * bitmap.PixelWidth * bitmap.PixelHeight];
bitmap.CopyToBuffer(imageBytes.AsBuffer());
Image.OnNext(new ImageData {
SoftwareBitmap = bitmap, Bytes = imageBytes
});
}
// This is the device-lost convention for Win2D.
catch (Exception e) when(_canvasDevice.IsDeviceLost(e.HResult))
{
// We lost our graphics device. Recreate it and reset
// our Direct3D11CaptureFramePool.
needsReset = true;
recreateDevice = true;
}
if (needsReset)
{
ResetFramePool(frame.ContentSize, recreateDevice);
}
}
/// <summary>
/// Render ObjectDetector skill results
/// </summary>
/// <param name="frame"></param>
/// <param name="objectDetections"></param>
/// <returns></returns>
private async Task DisplayFrameAndResultAsync(VideoFrame frame)
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
try
{
if (frame.SoftwareBitmap != null)
{
await m_processedBitmapSource.SetBitmapAsync(frame.SoftwareBitmap);
}
else
{
var bitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(frame.Direct3DSurface, BitmapAlphaMode.Ignore);
await m_processedBitmapSource.SetBitmapAsync(bitmap);
}
// Retrieve and filter results if requested
IReadOnlyList <ObjectDetectorResult> objectDetections = m_binding.DetectedObjects;
if (m_objectKinds?.Count > 0)
{
objectDetections = objectDetections.Where(det => m_objectKinds.Contains(det.Kind)).ToList();
}
// Update displayed results
m_bboxRenderer.Render(objectDetections);
// Update the displayed performance text
UIPerfTextBlock.Text = $"bind: {m_bindTime.ToString("F2")}ms, eval: {m_evalTime.ToString("F2")}ms";
}
catch (TaskCanceledException)
{
// no-op: we expect this exception when we change media sources
// and can safely ignore/continue
}
catch (Exception ex)
{
NotifyUser($"Exception while rendering results: {ex.Message}");
}
});
}
/// <summary>
/// Display a frame and the evaluation results on the UI
/// </summary>
/// <param name="frame"></param>
/// <returns></returns>
private async Task DisplayFrameAndResultAsync(VideoFrame frame)
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
try
{
// Enable results to be displayed
m_bodyRenderer.IsVisible = true;
// Display the input frame
if (frame.SoftwareBitmap != null)
{
await m_processedBitmapSource.SetBitmapAsync(frame.SoftwareBitmap);
}
else
{
var bitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(frame.Direct3DSurface, BitmapAlphaMode.Ignore);
await m_processedBitmapSource.SetBitmapAsync(bitmap);
}
// If our canvas overlay is properly resized, update displayed results
if (UICanvasOverlay.ActualWidth != 0)
{
m_bodyRenderer.Update(m_binding.Bodies, m_frameSource.FrameSourceType != FrameSourceType.Camera);
}
// Output result and perf text
UISkillOutputDetails.Text = $"Found {m_binding.Bodies.Count} bodies (bind: {m_bindTime.ToString("F2")}ms, eval: {m_evalTime.ToString("F2")}ms";
}
catch (TaskCanceledException)
{
// no-op: we expect this exception when we change media sources
// and can safely ignore/continue
}
catch (Exception ex)
{
NotifyUser($"Exception while rendering results: {ex.Message}");
}
});
}
public async Task <SoftwareBitmap> RenderToBitmapAsync(
RenderTargetBitmap renderTargetBitmap,
IReadOnlyList <InkStroke> inkStrokes,
IReadOnlyList <InkStroke> highlightStrokes, double width, double height)
{
var dpi = DisplayInformation.GetForCurrentView().LogicalDpi;
var renderTarget = new CanvasRenderTarget(_canvasDevice, (float)width, (float)height, dpi);
using (renderTarget)
{
try
{
using (var drawingSession = renderTarget.CreateDrawingSession())
{
var pixels = await renderTargetBitmap.GetPixelsAsync();
var bitmap = SoftwareBitmap.CreateCopyFromBuffer(pixels, BitmapPixelFormat.Bgra8,
renderTargetBitmap.PixelWidth, renderTargetBitmap.PixelHeight);
var convertedImage = SoftwareBitmap.Convert(
bitmap,
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Premultiplied
);
var background = CanvasBitmap.CreateFromSoftwareBitmap(_canvasDevice, convertedImage);
drawingSession.DrawImage(background, new Rect(0, 0,
width, height));
drawingSession.DrawInk(inkStrokes);
}
return(await SoftwareBitmap.CreateCopyFromSurfaceAsync(renderTarget, BitmapAlphaMode.Premultiplied));
}
catch (Exception e) when(_canvasDevice.IsDeviceLost(e.HResult))
{
_canvasDevice.RaiseDeviceLost();
}
}
return(null);
}
public async Task <SoftwareBitmap> RenderAsync(IEnumerable <InkStroke> inkStrokes, double width, double height)
{
var dpi = DisplayInformation.GetForCurrentView().LogicalDpi;
try
{
var renderTarget = new CanvasRenderTarget(_canvasDevice, (float)width, (float)height, dpi); using (renderTarget)
{
using (var drawingSession = renderTarget.CreateDrawingSession())
{
drawingSession.DrawInk(inkStrokes);
}
return(await SoftwareBitmap.CreateCopyFromSurfaceAsync(renderTarget));
}
}
catch (Exception e) when(_canvasDevice.IsDeviceLost(e.HResult))
{
_canvasDevice.RaiseDeviceLost();
}
return(null);
}
private async void MediaPlayer_VideoFrameAvailable(MediaPlayer sender, object args)
{
CanvasDevice canvasDevice = CanvasDevice.GetSharedDevice();
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
SoftwareBitmap softwareBitmapImg;
SoftwareBitmap frameServerDest = new SoftwareBitmap(BitmapPixelFormat.Bgra8, 500, 500, BitmapAlphaMode.Premultiplied);
using (CanvasBitmap canvasBitmap = CanvasBitmap.CreateFromSoftwareBitmap(canvasDevice, frameServerDest))
{
sender.CopyFrameToVideoSurface(canvasBitmap);
softwareBitmapImg = await SoftwareBitmap.CreateCopyFromSurfaceAsync(canvasBitmap, BitmapAlphaMode.Ignore);
}
SoftwareBitmapSource imageSource = new SoftwareBitmapSource();
await imageSource.SetBitmapAsync(softwareBitmapImg);
UIPreviewImage.Source = imageSource;
// Encapsulate the image within a VideoFrame to be bound and evaluated
VideoFrame inputImage = VideoFrame.CreateWithSoftwareBitmap(softwareBitmapImg);
await EvaluateVideoFrameAsync(inputImage);
});
}
private async void VideoFrameAvailable(MediaPlayer sender, object args)
{
CanvasDevice canvasDevice = CanvasDevice.GetSharedDevice();
int width = (int)sender.PlaybackSession.NaturalVideoWidth;
int height = (int)sender.PlaybackSession.NaturalVideoHeight;
if (frameBuffer == null)
{
frameBuffer = new SoftwareBitmap(BitmapPixelFormat.Rgba8, width, height, BitmapAlphaMode.Premultiplied);
}
await window.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async() => {
SoftwareBitmap frame;
using (var inputBitmap = CanvasBitmap.CreateFromSoftwareBitmap(canvasDevice, frameBuffer)) {
sender.CopyFrameToVideoSurface(inputBitmap);
frame = await SoftwareBitmap.CreateCopyFromSurfaceAsync(inputBitmap);
}
Width = frame.PixelWidth;
Height = frame.PixelHeight;
var cam = camera.View.Inverse();
var webcamToWorld = new Matrix4(cam.m00, cam.m01, cam.m02, cam.m03,
cam.m10, cam.m11, cam.m12, cam.m13,
cam.m20, cam.m21, cam.m22, cam.m23,
0, 0, 0, 1);
FrameReady?.Invoke(new FrameData()
{
bitmap = frame,
webcamToWorldMatrix = webcamToWorld,
projectionMatrix = camera.Projection
});
});
}
private async void MainToggleButton_Checked(object sender, RoutedEventArgs e)
{
// Select what we want to capture
var picker = new GraphicsCapturePicker();
var item = await picker.PickSingleItemAsync();
if (item != null)
{
// Get a temporary file to save our gif to
var file = await GetTempFileAsync();
using (var stream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
// Get the various d3d objects we'll need
var d3dDevice = Direct3D11Helpers.CreateSharpDXDevice(_device);
// Create our encoder
var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.GifEncoderId, stream);
// Write the application block
// http://www.vurdalakov.net/misc/gif/netscape-looping-application-extension
var containerProperties = encoder.BitmapContainerProperties;
await containerProperties.SetPropertiesAsync(new[]
{
new KeyValuePair <string, BitmapTypedValue>("/appext/application", new BitmapTypedValue(PropertyValue.CreateUInt8Array(Encoding.ASCII.GetBytes("NETSCAPE2.0")), PropertyType.UInt8Array)),
// The first value is the size of the block, which is the fixed value 3.
// The second value is the looping extension, which is the fixed value 1.
// The third and fourth values comprise an unsigned 2-byte integer (little endian).
// The value of 0 means to loop infinitely.
// The final value is the block terminator, which is the fixed value 0.
new KeyValuePair <string, BitmapTypedValue>("/appext/data", new BitmapTypedValue(PropertyValue.CreateUInt8Array(new byte[] { 3, 1, 0, 0, 0 }), PropertyType.UInt8Array)),
});
// Setup Windows.Graphics.Capture
var itemSize = item.Size;
var framePool = Direct3D11CaptureFramePool.CreateFreeThreaded(
_device,
DirectXPixelFormat.B8G8R8A8UIntNormalized,
1,
itemSize);
var session = framePool.CreateCaptureSession(item);
// We need a blank texture (background) and a texture that will hold the frame we'll be encoding
var description = new SharpDX.Direct3D11.Texture2DDescription
{
Width = itemSize.Width,
Height = itemSize.Height,
MipLevels = 1,
ArraySize = 1,
Format = SharpDX.DXGI.Format.B8G8R8A8_UNorm,
SampleDescription = new SharpDX.DXGI.SampleDescription()
{
Count = 1,
Quality = 0
},
Usage = SharpDX.Direct3D11.ResourceUsage.Default,
BindFlags = SharpDX.Direct3D11.BindFlags.ShaderResource | SharpDX.Direct3D11.BindFlags.RenderTarget,
CpuAccessFlags = SharpDX.Direct3D11.CpuAccessFlags.None,
OptionFlags = SharpDX.Direct3D11.ResourceOptionFlags.None
};
var gifTexture = new SharpDX.Direct3D11.Texture2D(d3dDevice, description);
var renderTargetView = new SharpDX.Direct3D11.RenderTargetView(d3dDevice, gifTexture);
// Encode frames as they arrive. Because we created our frame pool using
// Direct3D11CaptureFramePool::CreateFreeThreaded, this lambda will fire on a different thread
// than our current one. If you'd like the callback to fire on your thread, create the frame pool
// using Direct3D11CaptureFramePool::Create and make sure your thread has a DispatcherQueue and you
// are pumping messages.
TimeSpan lastTimeStamp = TimeSpan.MinValue;
var frameCount = 0;
framePool.FrameArrived += async(s, a) =>
{
using (var frame = s.TryGetNextFrame())
{
var contentSize = frame.ContentSize;
var timeStamp = frame.SystemRelativeTime;
using (var sourceTexture = Direct3D11Helpers.CreateSharpDXTexture2D(frame.Surface))
{
var width = Math.Clamp(contentSize.Width, 0, itemSize.Width);
var height = Math.Clamp(contentSize.Height, 0, itemSize.Height);
var region = new SharpDX.Direct3D11.ResourceRegion(0, 0, 0, width, height, 1);
d3dDevice.ImmediateContext.ClearRenderTargetView(renderTargetView, new SharpDX.Mathematics.Interop.RawColor4(0, 0, 0, 1));
d3dDevice.ImmediateContext.CopySubresourceRegion(sourceTexture, 0, region, gifTexture, 0);
}
if (lastTimeStamp == TimeSpan.MinValue)
{
lastTimeStamp = timeStamp;
}
var timeStampDelta = timeStamp - lastTimeStamp;
lastTimeStamp = timeStamp;
var milliseconds = timeStampDelta.TotalMilliseconds;
// Use 10ms units
var frameDelay = milliseconds / 10;
if (frameCount > 0)
{
await encoder.GoToNextFrameAsync();
}
// Write our frame delay
await encoder.BitmapProperties.SetPropertiesAsync(new[]
{
new KeyValuePair <string, BitmapTypedValue>("/grctlext/Delay", new BitmapTypedValue(PropertyValue.CreateUInt16((ushort)frameDelay), PropertyType.UInt16)),
});
// Write the frame to our image
var gifSurface = Direct3D11Helpers.CreateDirect3DSurfaceFromSharpDXTexture(gifTexture);
var copy = await SoftwareBitmap.CreateCopyFromSurfaceAsync(gifSurface);
encoder.SetSoftwareBitmap(copy);
frameCount++;
}
};
session.StartCapture();
await _semaphore.WaitAsync();
session.Dispose();
framePool.Dispose();
await Task.Delay(1000);
await encoder.FlushAsync();
var newFile = await PickGifAsync();
if (newFile == null)
{
await file.DeleteAsync();
return;
}
await file.MoveAndReplaceAsync(newFile);
await Launcher.LaunchFileAsync(newFile);
}
}
}
/// <summary>
/// Event handler for video frames for the local video capture device.
/// </summary>
private async void FrameArrivedHandler(MediaFrameReader sender, MediaFrameArrivedEventArgs e)
{
if (!_isClosed)
{
using (var frame = sender.TryAcquireLatestFrame())
{
if (_isClosed || frame == null)
{
return;
}
var vmf = frame.VideoMediaFrame;
var videoFrame = vmf.GetVideoFrame();
var sbmp = await SoftwareBitmap.CreateCopyFromSurfaceAsync(videoFrame.Direct3DSurface);
if (sbmp == null)
{
logger.LogWarning("Failed to get bitmap from video frame reader.");
}
else
{
if (!_isClosed && OnVideoSourceEncodedSample != null)
{
lock (_vp8Encoder)
{
SoftwareBitmap nv12bmp = null;
// If the bitmap is not in the required pixel format for the encoder convert it.
if (_mediaFrameSource.CurrentFormat.Subtype != VIDEO_DESIRED_PIXEL_FORMAT)
{
nv12bmp = SoftwareBitmap.Convert(sbmp, BitmapPixelFormat.Nv12);
}
byte[] nv12Buffer = null;
SoftwareBitmap inputBmp = nv12bmp ?? sbmp;
using (BitmapBuffer buffer = inputBmp.LockBuffer(BitmapBufferAccessMode.Read))
{
using (var reference = buffer.CreateReference())
{
unsafe
{
byte *dataInBytes;
uint capacity;
((IMemoryBufferByteAccess)reference).GetBuffer(out dataInBytes, out capacity);
nv12Buffer = new byte[capacity];
Marshal.Copy((IntPtr)dataInBytes, nv12Buffer, 0, (int)capacity);
}
}
}
byte[] encodedBuffer = null;
encodedBuffer = _vp8Encoder.Encode(nv12Buffer, _forceKeyFrame);
if (encodedBuffer != null)
{
uint fps = (_fpsDenominator > 0 && _fpsNumerator > 0) ? _fpsNumerator / _fpsDenominator : DEFAULT_FRAMES_PER_SECOND;
uint durationRtpTS = VIDEO_SAMPLING_RATE / fps;
OnVideoSourceEncodedSample.Invoke(durationRtpTS, encodedBuffer);
}
if (_forceKeyFrame)
{
_forceKeyFrame = false;
}
nv12bmp?.Dispose();
}
}
sbmp.Dispose();
videoFrame.Dispose();
}
}
}
}
// <SnippetCreateSoftwareBitmapFromSurface>
private async void CreateSoftwareBitmapFromSurface(IDirect3DSurface surface)
{
softwareBitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(surface);
}
static async Task Main()
{
Console.WriteLine("Video Capture Test");
//await ListDevicesAndFormats();
//Console.ReadLine();
var mediaFrameReader = await StartVideoCapture().ConfigureAwait(false);
if (mediaFrameReader != null)
{
// Open a Window to display the video feed from video capture device
_form = new Form();
_form.AutoSize = true;
_form.BackgroundImageLayout = ImageLayout.Center;
_picBox = new PictureBox
{
Size = new Size(FRAME_WIDTH, FRAME_HEIGHT),
Location = new Point(0, 0),
Visible = true
};
_form.Controls.Add(_picBox);
bool taskRunning = false;
SoftwareBitmap backBuffer = null;
// Lambda handler for captured frames.
mediaFrameReader.FrameArrived += async(MediaFrameReader sender, MediaFrameArrivedEventArgs e) =>
{
if (taskRunning)
{
return;
}
taskRunning = true;
var mediaFrameReference = sender.TryAcquireLatestFrame();
var videoMediaFrame = mediaFrameReference?.VideoMediaFrame;
var softwareBitmap = videoMediaFrame?.SoftwareBitmap;
if (softwareBitmap == null && videoMediaFrame != null)
{
var videoFrame = videoMediaFrame.GetVideoFrame();
softwareBitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(videoFrame.Direct3DSurface);
}
if (softwareBitmap != null)
{
Console.WriteLine($"Software bitmap pixel fmt {softwareBitmap.BitmapPixelFormat}, alpha mode {softwareBitmap.BitmapAlphaMode}.");
if (softwareBitmap.BitmapPixelFormat != Windows.Graphics.Imaging.BitmapPixelFormat.Bgra8 ||
softwareBitmap.BitmapAlphaMode != Windows.Graphics.Imaging.BitmapAlphaMode.Premultiplied)
{
softwareBitmap = SoftwareBitmap.Convert(softwareBitmap, BitmapPixelFormat.Bgra8, BitmapAlphaMode.Premultiplied);
}
int width = softwareBitmap.PixelWidth;
int height = softwareBitmap.PixelHeight;
Console.WriteLine($"Software bitmap frame size {width}x{height}.");
// Swap the processed frame to _backBuffer and dispose of the unused image.
softwareBitmap = Interlocked.Exchange(ref backBuffer, softwareBitmap);
softwareBitmap?.Dispose();
_form.BeginInvoke(new Action(() =>
{
if (_picBox.Width != width || _picBox.Height != height)
{
_picBox.Size = new Size(width, height);
}
using (BitmapBuffer buffer = backBuffer.LockBuffer(BitmapBufferAccessMode.Read))
{
using (var reference = buffer.CreateReference())
{
unsafe
{
byte *dataInBytes;
uint capacity;
reference.As <IMemoryBufferByteAccess>().GetBuffer(out dataInBytes, out capacity);
Bitmap bmpImage = new Bitmap((int)width, (int)height, (int)(capacity / height), PixelFormat.Format32bppArgb, (IntPtr)dataInBytes);
_picBox.Image = bmpImage;
}
}
}
}));
}
else
{
Console.WriteLine("null");
}
taskRunning = false;
};
Console.WriteLine("Starting media frame reader.");
_ = Task.Run(async() => await mediaFrameReader.StartAsync()).ConfigureAwait(false);
Console.WriteLine("Starting Windows Forms message loop.");
Application.EnableVisualStyles();
Application.Run(_form);
}
else
{
Console.WriteLine("Could not acquire a media frame reader.");
}
}
/// <summary>
/// Triggered when UIButtonFilePick is clicked
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void UIButtonFilePick_Click(object sender, RoutedEventArgs e)
{
// Disable subsequent trigger of this event callback
UIButtonFilePick.IsEnabled = false;
UICameraToggle.IsEnabled = false;
m_newBackgroundImageAvailable = true;
m_ImageClickedOnce = true;
// Stop Camera preview
UICameraPreview.Stop();
if (UICameraPreview.CameraHelper != null)
{
await UICameraPreview.CameraHelper.CleanUpAsync();
}
UICameraPreview.Visibility = Visibility.Collapsed;
try
{
m_currentFrameSourceToggled = FrameSourceToggledType.ImageFile;
var frame = await LoadVideoFrameFromFilePickedAsync();
// Instantiate skill only if object is null or selected execution device has changed
if ((m_paramsSkillObj.m_selectedDeviceId != UISkillExecutionDevices.SelectedIndex) || (m_paramsSkillObj.m_skill == null))
{
//Release previous instance
if (m_paramsSkillObj.m_skill != null)
{
m_paramsSkillObj.m_skill = null;
}
// Update selected device
m_paramsSkillObj.m_selectedDeviceId = UISkillExecutionDevices.SelectedIndex;
// Initialize skill with the selected supported device
m_paramsSkillObj.m_skill = await m_paramsSkillObj.m_skillDescriptor.CreateSkillAsync(m_paramsSkillObj.m_availableExecutionDevices[m_paramsSkillObj.m_selectedDeviceId]) as BackgroundReplacementSkill;
// Instantiate a binding object that will hold the skill's input and output resource
m_paramsSkillObj.m_binding = await m_paramsSkillObj.m_skill.CreateSkillBindingAsync() as BackgroundReplacementBinding;
}
if (frame != null)
{
// Update input image and run the skill against it
await m_paramsSkillObj.m_binding.SetInputImageAsync(frame);
if (m_newBackgroundImageAvailable)
{
while (m_backgroundImage == null)
{
//wait here until background image is available
}
await m_paramsSkillObj.m_binding.SetBackgroundImageAsync(m_backgroundImage);
m_newBackgroundImageAvailable = false;
}
// Evaluate skill
await m_paramsSkillObj.m_skill.EvaluateAsync(m_paramsSkillObj.m_binding);
VideoFrame replacedOutput = null;
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
// Retrieve result and display
replacedOutput = await m_paramsSkillObj.m_binding.GetOutputImageAsync();
if (replacedOutput.SoftwareBitmap == null)
{
SoftwareBitmap softwareBitmapOut = await SoftwareBitmap.CreateCopyFromSurfaceAsync(replacedOutput.Direct3DSurface);
softwareBitmapOut = SoftwareBitmap.Convert(softwareBitmapOut, BitmapPixelFormat.Bgra8, BitmapAlphaMode.Premultiplied);
await m_bitmapSource.SetBitmapAsync(softwareBitmapOut);
UIOutputViewer.Source = m_bitmapSource;
}
else
{
await m_bitmapSource.SetBitmapAsync(replacedOutput.SoftwareBitmap);
UIOutputViewer.Source = m_bitmapSource;
}
});
}
}
catch (Exception ex)
{
await(new MessageDialog(ex.Message)).ShowAsync();
}
// Enable subsequent trigger of this event callback
UIButtonFilePick.IsEnabled = true;
UICameraToggle.IsEnabled = true;
}
