private bool PopulateThumbnailAndMetaData(MediaItem mediaItem)
{
byte[] thumb = null;
if (mediaItem.ThumbnailImageSource == null)
{
// ReSharper disable once StyleCop.SA1117
thumb = _thumbnailService.GetThumbnail(
mediaItem.FilePath,
Unosquare.FFME.MediaElement.FFmpegDirectory,
mediaItem.MediaType.Classification,
mediaItem.LastChanged,
out var _);
if (thumb == null)
{
return(false);
}
}
DispatcherHelper.CheckBeginInvokeOnUI(() =>
{
mediaItem.ThumbnailImageSource = GraphicsUtils.ByteArrayToImage(thumb);
});
return(true);
}
private void PopulateThumbnail(MediaItem mediaItem)
{
if (!IsThumbnailPopulated(mediaItem))
{
// ReSharper disable once StyleCop.SA1117
byte[] thumb = _thumbnailService.GetThumbnail(
mediaItem.FilePath,
Unosquare.FFME.MediaElement.FFmpegDirectory,
mediaItem.MediaType.Classification,
mediaItem.LastChanged,
out var _);
if (thumb != null)
{
DispatcherHelper.CheckBeginInvokeOnUI(() =>
{
mediaItem.ThumbnailImageSource = GraphicsUtils.ByteArrayToImage(thumb);
});
}
}
}
private async Task PopulateThumbnailAsync(MediaItem mediaItem)
{
if (mediaItem.FilePath != null && mediaItem.MediaType != null && !IsThumbnailPopulated(mediaItem))
{
byte[]? thumb = null;
await Task.Run(
() =>
{
thumb = _thumbnailService.GetThumbnail(
mediaItem.FilePath,
Unosquare.FFME.Library.FFmpegDirectory,
mediaItem.MediaType.Classification,
mediaItem.LastChanged,
out var _);
}, _cancellationToken);
if (thumb != null && !IsThumbnailPopulated(mediaItem) && !_cancellationToken.IsCancellationRequested)
{
mediaItem.ThumbnailImageSource = GraphicsUtils.ByteArrayToImage(thumb);
}
}
}
private byte[] CreateFramedSmallIcon(byte[] bytes)
{
const int pixelSize = 100;
var image = GraphicsUtils.ByteArrayToImage(bytes);
if (Math.Max(image.Height, image.Width) < pixelSize)
{
var visual = new DrawingVisual();
using (var drawingContext = visual.RenderOpen())
{
drawingContext.DrawRectangle(
System.Windows.Media.Brushes.Black,
null,
new Rect(0, 0, pixelSize, pixelSize));
var left = (pixelSize - image.Width) / 2;
var top = (pixelSize - image.Height) / 2;
drawingContext.DrawImage(image, new Rect(left, top, image.Width, image.Height));
}
var bitmap = new RenderTargetBitmap(pixelSize, pixelSize, 96, 96, PixelFormats.Pbgra32);
bitmap.Render(visual);
var encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bitmap));
using (var stream = new MemoryStream())
{
encoder.Save(stream);
bytes = stream.ToArray();
}
}
return(bytes);
}