public SoftwareBitmap ProcessFrame(MediaFrameReference frame)
{
var softwareBitmap = FrameRenderer.ConvertToDisplayableImage(frame?.VideoMediaFrame);
var softwareBitmap2 = softwareBitmap != null?SoftwareBitmap.Copy(softwareBitmap) : null;
if (softwareBitmap != null)
{
softwareBitmap =
Interlocked.Exchange(ref _backBuffer, softwareBitmap);
var task = _imageElement.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
async() =>
{
if (_taskRunning)
{
return;
}
_taskRunning = true;
SoftwareBitmap latestBitmap;
while ((latestBitmap = Interlocked.Exchange(ref _backBuffer, null)) != null)
{
var imageSource = (SoftwareBitmapSource)_imageElement.Source;
await imageSource.SetBitmapAsync(latestBitmap);
latestBitmap.Dispose();
}
_taskRunning = false;
});
}
return(softwareBitmap2);
}
public async void ProcessFrame(MediaFrameReference frame)
{
var softwareBitmap = FrameRenderer.ConvertToDisplayableImage(frame?.VideoMediaFrame);
_bytes = await Convert(softwareBitmap);
if (softwareBitmap != null)
{
// Swap the processed frame to _backBuffer and trigger UI thread to render it
softwareBitmap = Interlocked.Exchange(ref _backBuffer, softwareBitmap);
//
// UI thread always reset _backBuffer before using it. Unused bitmap should be disposed.
softwareBitmap?.Dispose();
// Changes to xaml ImageElement must happen in UI thread through Dispatcher
var task = _imageElement.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
async() =>
{
// Don't let two copies of this task run at the same time.
if (_taskRunning)
{
return;
}
_taskRunning = true;
// Keep draining frames from the backbuffer until the backbuffer is empty.
SoftwareBitmap latestBitmap;
while ((latestBitmap = Interlocked.Exchange(ref _backBuffer, null)) != null)
{
_bytes = await Convert(latestBitmap);
var imageSource = (SoftwareBitmapSource)_imageElement.Source;
await imageSource.SetBitmapAsync(latestBitmap);
latestBitmap.Dispose();
}
_taskRunning = false;
});
}
}
public void ProcessFrame(MediaFrameReference frame)
{
var softwareBitmap = FrameRenderer.ConvertToDisplayableImage(frame?.VideoMediaFrame);
RenderFrame(softwareBitmap);
}