private async Task RunSkillAsync(VideoFrame frame)
{
// Update input image and run the skill against it
await m_binding.SetInputImageAsync(frame);
await m_skill.EvaluateAsync(m_binding);
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
// Retrieve result
if (!m_binding.IsFaceFound)
{
// if no face found, hide the rectangle in the UI
m_faceSentimentRenderer.IsVisible = false;
UISkillOutputDetails.Text = "No face found";
}
else // Display the face rectangle and sentiment in the UI
{
m_faceSentimentRenderer.Update(m_binding.FaceRectangle, m_binding.PredominantSentiment);
m_faceSentimentRenderer.IsVisible = true;
var scores = (m_binding["FaceSentimentScores"].FeatureValue as SkillFeatureTensorFloatValue).GetAsVectorView();
UISkillOutputDetails.Text = "";
for (int i = 0; i < (int)SentimentType.contempt; i++)
{
UISkillOutputDetails.Text += $"{(SentimentType)i} : {scores[i]} {(i == (int)m_binding.PredominantSentiment ? " <<------" : "")} \n";
}
}
});
}
/// <summary>
/// Evaluates the frame for scene classification
/// </summary>
/// <param name="vf"></param>
/// <returns></returns>
private static async Task EvaluateFrameAsync(VideoFrame vf)
{
// Process 1 frame at a time, if busy return right away
if (0 == Interlocked.Exchange(ref m_lock, 1))
{
// Update input image and run the skill against it
await m_binding.SetInputImageAsync(vf);
await m_skill.EvaluateAsync(m_binding);
string outText = "";
if (!m_binding.IsFaceFound)
{
// if no face found, hide the rectangle in the UI
outText = "No face found";
}
else // Display the sentiment on the console
{
outText = "Your sentiment looks like: " + m_binding.PredominantSentiment.ToString();
var folder = await StorageFolder.GetFolderFromPathAsync(System.AppContext.BaseDirectory);
var file = await folder.CreateFileAsync(m_binding.PredominantSentiment.ToString() + "Face.jpg", CreationCollisionOption.ReplaceExisting);
using (IRandomAccessStream stream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream);
SoftwareBitmap sb;
if (vf.SoftwareBitmap == null)
{
sb = await SoftwareBitmap.CreateCopyFromSurfaceAsync(vf.Direct3DSurface);
}
else
{
sb = vf.SoftwareBitmap;
}
encoder.SetSoftwareBitmap(
sb.BitmapPixelFormat.Equals(BitmapPixelFormat.Bgra8) ? sb : SoftwareBitmap.Convert(sb, BitmapPixelFormat.Bgra8)
);
await encoder.FlushAsync();
}
}
Console.Write("\r" + outText + "\t\t\t\t\t");
// Release the lock
Interlocked.Exchange(ref m_lock, 0);
}
}