public async Task ExecuteAsync(
MediaProcessorContext context,
CancellationToken cancellationToken)
{
MemoryStream stream = new MemoryStream();
await context.Image.SaveAsJpegAsync(stream, cancellationToken);
stream.Position = 0;
IEnumerable <FaceDetectionResponse> detectedFaces = await _faceDetectionService
.DetectFacesAsync(stream, cancellationToken);
IEnumerable <FaceData> faceData = detectedFaces.Select(f =>
new FaceData
{
Box = f.Box,
Encoding = f.Encoding,
Id = Guid.NewGuid()
}).ToList();
IEnumerable <BoxExtractionInput> inputs = faceData.Select(f =>
new BoxExtractionInput
{
Box = f.Box,
Id = f.Id
});
stream.Position = 0;
IEnumerable <BoxExtractionResult> faceImages = await _boxExtractorService
.ExtractBoxesAsync(stream, inputs, ThumbnailSizeName.M, default);
ILookup <Guid, BoxExtractionResult> faceLookup = faceImages.ToLookup(x => x.Id);
foreach (FaceData face in faceData)
{
ThumbnailResult thumb = faceLookup[face.Id].Single().Thumbnail;
face.Thumbnail = new MediaThumbnail
{
Id = Guid.NewGuid(),
Data = thumb.Data,
Dimensions = thumb.Dimensions,
Format = thumb.Format,
Size = thumb.Size
};
}
context.FaceData = faceData;
}
public async Task <IEnumerable <SampleMedia> > GetSampleMediaListAsync()
{
foreach (SampleMedia sample in _samples)
{
using var fileStream = new FileStream(sample.Path, FileMode.Open);
ThumbnailResult thumb = await _thumbnailService
.GenerateThumbnailAsync(
fileStream,
ThumbnailSizeName.M,
default);
sample.Thumbnail = thumb.Data.ToDataUrl("jpg");
}
return(_samples);
}
public async Task <IEnumerable <ThumbnailResult> > GenerateAllThumbnailAsync(
Image image,
CancellationToken cancellationToken)
{
var thumbs = new List <ThumbnailResult>();
foreach (ThumbnailSizeDefinition?def in _sizeDefinitions)
{
ThumbnailResult thumb = await GenerateThumbnailAsync(
image,
def.Name,
cancellationToken);
thumbs.Add(thumb);
}
return(thumbs);
}
private async Task <IEnumerable <FaceData> > GetFaceData(Stream image)
{
IEnumerable <FaceDetectionResponse> detectedFaces = await _faceDetectionService
.DetectFacesAsync(image, default);
IEnumerable <FaceData> faceData = detectedFaces.Select(f =>
new FaceData
{
Box = f.Box,
Encoding = f.Encoding,
Id = Guid.NewGuid()
}).ToList();
IEnumerable <BoxExtractionInput> inputs = faceData.Select(f =>
new BoxExtractionInput
{
Box = f.Box,
Id = f.Id
});
image.Position = 0;
IEnumerable <BoxExtractionResult> faceImages = await _faceExtractorService
.ExtractBoxesAsync(image, inputs, ThumbnailSizeName.M, default);
ILookup <Guid, BoxExtractionResult> faceLookup = faceImages.ToLookup(x => x.Id);
foreach (FaceData face in faceData)
{
ThumbnailResult thumb = faceLookup[face.Id].Single().Thumbnail;
face.Thumbnail = new MediaThumbnail
{
Id = Guid.NewGuid(),
Data = thumb.Data,
Dimensions = thumb.Dimensions,
Format = thumb.Format,
Size = thumb.Size
};
}
return(faceData);
}
public async Task GenerateThumbnail()
{
// Arrange
var defs = new List <ThumbnailSizeDefinition>
{
new ThumbnailSizeDefinition
{
Name = ThumbnailSizeName.M,
Width = 240
}
};
var service = new ThumbnailService(defs);
Image image = TestMediaLibrary.WithExif.AsImage();
// Act
ThumbnailResult thumb = await service.GenerateThumbnailAsync(
image,
ThumbnailSizeName.M,
default);
// Assert
//thumb.Dimensions.Width.Should()
}
