async void OnFrameArrived(MediaFrameReader sender, MediaFrameArrivedEventArgs args)
{
if (Interlocked.CompareExchange(ref this.processingFlag, 1, 0) == 0)
{
try
{
using (var frame = sender.TryAcquireLatestFrame())
using (var videoFrame = frame.VideoMediaFrame?.GetVideoFrame())
{
if (videoFrame != null)
{
// If there is a frame, set it as input to the model
ONNXModelInput input = new ONNXModelInput();
input.data = videoFrame;
// Evaluate the input data
var evalOutput = await model.EvaluateAsync(input);
// Do something with the model output
await this.ProcessOutputAsync(evalOutput);
}
}
}
finally
{
Interlocked.Exchange(ref this.processingFlag, 0);
}
}
}
/// <summary>
/// Evaluate the model
/// </summary>
/// <param name="input">The VideoFrame to evaluate</param>
/// <returns></returns>
public async Task <ONNXModelOutput> EvaluateAsync(ONNXModelInput input)
{
var output = new ONNXModelOutput();
var binding = new LearningModelBinding(_session);
binding.Bind("data", input.data);
binding.Bind("classLabel", output.classLabel);
binding.Bind("loss", output.loss);
LearningModelEvaluationResult result = await _session.EvaluateAsync(binding, "0");
return(output);
}