private void Vision_OnObjectClassified(object sender, ClassificationResultArgs e)
{
// Display the top guess for the dominant object on the image
_text.text = e.observations.First().identifier;
// Release the native object
_cvPixelBuffer.Dispose();
}
public override void DidOutputSampleBuffer(AVCaptureOutput captureOutput, CMSampleBuffer sampleBuffer, AVCaptureConnection connection)
{
if (ready)
{
ready = false;
CVPixelBuffer cVPixelBuffer = (CVPixelBuffer)sampleBuffer.GetImageBuffer();
cVPixelBuffer.Lock(CVPixelBufferLock.ReadOnly);
nint dataSize = cVPixelBuffer.DataSize;
width = cVPixelBuffer.Width;
height = cVPixelBuffer.Height;
IntPtr baseAddress = cVPixelBuffer.BaseAddress;
bpr = cVPixelBuffer.BytesPerRow;
cVPixelBuffer.Unlock(CVPixelBufferLock.ReadOnly);
buffer = NSData.FromBytes(baseAddress, (nuint)dataSize);
cVPixelBuffer.Dispose();
queue.DispatchAsync(ReadTask);
}
sampleBuffer.Dispose();
}
public override void DidOutputSampleBuffer(AVCaptureOutput captureOutput, CMSampleBuffer sampleBuffer, AVCaptureConnection connection)
{
if (ready)
{
ready = false;
pixelBuffer = (CVPixelBuffer)sampleBuffer.GetImageBuffer();
pixelBuffer.Lock(CVPixelBufferLock.None);
width = pixelBuffer.Width;
height = pixelBuffer.Height;
bytesPerRow = pixelBuffer.BytesPerRow;
context = new CGBitmapContext(pixelBuffer.BaseAddress, width, height, 8, bytesPerRow, colorSpace, CGImageAlphaInfo.PremultipliedFirst);
cgImage = context.ToImage();
uiImage = new UIImage(cgImage);
pixelBuffer.Unlock(CVPixelBufferLock.None);
pixelBuffer.Dispose();
queue.DispatchAsync(ReadTask);
}
sampleBuffer.Dispose();
}
public virtual void DidOutputSampleBuffer(AVCaptureOutput captureOutput, CMSampleBuffer sampleBuffer, AVCaptureConnection connection)
{
CVPixelBuffer pixelBuffer = null;
VNImageRequestHandler imageRequestHandler = null;
try
{
pixelBuffer = sampleBuffer.GetImageBuffer() as CVPixelBuffer;
if (pixelBuffer == null)
{
return;
}
// TODO See if this causes issues disposing directly after
bufferOutputhandler.Invoke(pixelBuffer);
}
catch (Exception x)
{
Console.WriteLine(x.Message);
}
finally
{
if (sampleBuffer != null)
{
sampleBuffer.Dispose();
}
if (pixelBuffer != null)
{
pixelBuffer.Dispose();
}
if (imageRequestHandler != null)
{
imageRequestHandler.Dispose();
}
}
}
public override void StartVideoCompositionRequest(AVAsynchronousVideoCompositionRequest asyncVideoCompositionRequest)
{
renderingQueue.DispatchAsync(() => {
if (shouldCancelAllRequests)
{
asyncVideoCompositionRequest.FinishCancelledRequest();
}
else
{
NSError error = null;
CVPixelBuffer resultPixels = newRenderedPixelBufferForRequest(asyncVideoCompositionRequest, out error);
if (resultPixels != null)
{
asyncVideoCompositionRequest.FinishWithComposedVideoFrame(resultPixels);
resultPixels.Dispose();
}
else
{
asyncVideoCompositionRequest.FinishWithError(error);
}
}
});
}
