private Task CreateScreenCaptureTask()
{
Logger.Debug("Screen", "CreateScreenCaptureTask");
return(new Task(() => {
if (null == customVideoCapturer)
{
return;
}
while (true)
{
using (var frame = screenCaptureQueue.Take())
{
if (null == frame)
{
return;
}
if ((frame.ContentSize.Width != lastSize.Width) ||
(frame.ContentSize.Height != lastSize.Height))
{
lastSize = frame.ContentSize;
ResetFramePool(frame.ContentSize, false);
}
try
{
var canvasBitmap = CanvasBitmap.CreateFromDirect3D11Surface(canvasDevice, frame.Surface);
uint actualBitmapWidth = canvasBitmap.SizeInPixels.Width;
uint actualBitmapHeight = canvasBitmap.SizeInPixels.Height;
uint bitmapWidth = actualBitmapWidth;
uint bitmapHeight = actualBitmapHeight;
if (bitmapWidth % 2 != 0)
{
bitmapWidth += 1;
}
if (bitmapHeight % 2 != 0)
{
bitmapHeight += 1;
}
VideoData rgbData = new VideoData((ulong)(bitmapWidth * bitmapHeight * 4));
var pixels = canvasBitmap.GetPixelBytes();
if (bitmapWidth != actualBitmapWidth)
{
var tmpPixels = new byte[bitmapWidth * bitmapHeight * 4];
Int64 indexSource = 0;
Int64 indexDest = 0;
Int64 strideSource = actualBitmapWidth * 4;
Int64 strideDest = bitmapWidth * 4;
for (uint y = 0; y < actualBitmapHeight; ++y)
{
Array.Copy(pixels, indexSource, tmpPixels, indexDest, strideSource);
indexSource += strideSource;
indexDest += strideDest;
}
pixels = tmpPixels;
}
rgbData.SetData8bit(pixels);
var buffer = VideoFrameBuffer.CreateFromARGB(
(int)bitmapWidth,
(int)bitmapHeight,
(int)(4 * bitmapWidth),
rgbData);
customVideoCapturer.NotifyFrame(
buffer,
(ulong)(DateTimeOffset.Now.ToUnixTimeMilliseconds()),
VideoRotation.Rotation0);
}
catch (Exception e) when(canvasDevice.IsDeviceLost(e.HResult))
{
ResetFramePool(frame.ContentSize, true);
}
}
}
}));
}
