async void Start()
{
try
{
// Create a new instance of the network model class
// and asynchronously load the onnx model
_networkModel = new NetworkModel();
await _networkModel.LoadModelAsync();
StatusBlock.text = $"Loaded model. Starting camera...";
#if ENABLE_WINMD_SUPPORT
// Configure camera to return frames fitting the model input size
try
{
Debug.Log("Creating MediaCaptureUtility and initializing frame reader.");
_mediaCaptureUtility = new MediaCaptureUtility();
await _mediaCaptureUtility.InitializeMediaFrameReaderAsync(
(uint)InputFeatureSize.x, (uint)InputFeatureSize.y);
StatusBlock.text = $"Camera started. Running!";
Debug.Log("Successfully initialized frame reader.");
}
catch (Exception ex)
{
StatusBlock.text = $"Failed to start camera: {ex.Message}. Using loaded/picked image.";
}
// Run processing loop in separate parallel Task, get the latest frame
// and asynchronously evaluate
Debug.Log("Begin performing inference in frame grab loop.");
_isRunning = true;
await Task.Run(async() =>
{
while (_isRunning)
{
if (_mediaCaptureUtility.IsCapturing)
{
using (var videoFrame = _mediaCaptureUtility.GetLatestFrame())
{
await EvaluateFrame(videoFrame);
}
}
else
{
return;
}
}
});
#endif
}
catch (Exception ex)
{
StatusBlock.text = $"Error init: {ex.Message}";
Debug.LogError($"Failed to start model inference: {ex}");
}
}
