private static async Task <FaceRecognitionResult> InvokeRecognizeAsync(MediaVisionSource source,
FaceRecognitionModel recognitionModel, Rectangle?area,
FaceRecognitionConfiguration config)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (recognitionModel == null)
{
throw new ArgumentNullException(nameof(recognitionModel));
}
TaskCompletionSource <FaceRecognitionResult> tcs = new TaskCompletionSource <FaceRecognitionResult>();
using (var cb = ObjectKeeper.Get(GetRecognizedCallback(tcs)))
{
InvokeRecognize(source.Handle, recognitionModel.Handle, EngineConfiguration.GetHandle(config),
cb.Target, area).Validate("Failed to perform face recognition.");
return(await tcs.Task);
}
}
/// <summary>
/// Performs face recognition on the source with <see cref="FaceRecognitionModel"/> and <see cref="FaceRecognitionConfiguration"/>.
/// </summary>
/// <param name="source">The <see cref="MediaVisionSource"/> of the media to recognize faces for.</param>
/// <param name="recognitionModel">The <see cref="FaceRecognitionModel"/> to be used for recognition.</param>
/// <param name="config">The configuration used for recognition. This value can be null.</param>
/// <returns>A task that represents the asynchronous recognition operation.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="source"/> is null.<br/>
/// -or-<br/>
/// <paramref name="recognitionModel"/> is null.
/// </exception>
/// <exception cref="NotSupportedException">The feature is not supported.</exception>
/// <exception cref="ObjectDisposedException">
/// <paramref name="source"/> has already been disposed of.<br/>
/// -or-<br/>
/// <paramref name="config"/> has already been disposed of.
/// </exception>
/// <exception cref="InvalidOperationException"><paramref name="recognitionModel"/> is untrained model.</exception>
/// <feature>http://tizen.org/feature/vision.face_recognition</feature>
/// <since_tizen> 4 </since_tizen>
public static async Task <FaceRecognitionResult> RecognizeAsync(MediaVisionSource source,
FaceRecognitionModel recognitionModel, FaceRecognitionConfiguration config)
{
return(await InvokeRecognizeAsync(source, recognitionModel, null, config));
}
/// <summary>
/// Performs face recognition on the source with <see cref="FaceRecognitionModel"/> and a bounding box.
/// </summary>
/// <param name="source">The <see cref="MediaVisionSource"/> of the media to recognize faces for.</param>
/// <param name="recognitionModel">The <see cref="FaceRecognitionModel"/> to be used for recognition.</param>
/// <param name="bound">Rectangular box bounding face image on the source.</param>
/// <returns>A task that represents the asynchronous recognition operation.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="source"/> is null.<br/>
/// -or-<br/>
/// <paramref name="recognitionModel"/> is null.
/// </exception>
/// <exception cref="NotSupportedException">The feature is not supported.</exception>
/// <exception cref="ObjectDisposedException"><paramref name="source"/> has already been disposed of.</exception>
/// <exception cref="InvalidOperationException"><paramref name="recognitionModel"/> is untrained model.</exception>
/// <feature>http://tizen.org/feature/vision.face_recognition</feature>
/// <since_tizen> 4 </since_tizen>
public static async Task <FaceRecognitionResult> RecognizeAsync(MediaVisionSource source,
FaceRecognitionModel recognitionModel, Rectangle bound)
{
return(await InvokeRecognizeAsync(source, recognitionModel, bound, null));
}