// Returns false is no snapshot generation was required, true otherwise
private async Task <Boolean> GenerateThumbnail(VideoItem videoItem)
{
if (videoItem.IsPictureLoaded)
{
return(false);
}
try
{
if (ContinueIndexing != null)
{
await ContinueIndexing.Task;
ContinueIndexing = null;
}
WriteableBitmap image = null;
StorageItemThumbnail thumb = null;
// If file is a mkv, we save the thumbnail in a VideoPic folder so we don't consume CPU and resources each launch
if (VLCFileExtensions.MFSupported.Contains(videoItem.Type.ToLower()))
{
if (await videoItem.LoadFileFromPath())
{
thumb = await ThumbsService.GetThumbnail(videoItem.File);
}
}
// If MF thumbnail generation failed or wasn't supported:
if (thumb == null)
{
if (await videoItem.LoadFileFromPath() || !string.IsNullOrEmpty(videoItem.Token))
{
var res = await ThumbsService.GetScreenshot(videoItem.GetMrlAndFromType(true).Item2);
image = res?.Bitmap();
}
}
if (thumb == null && image == null)
{
return(false);
}
// RunAsync won't await on the lambda it receives, so we need to do it ourselves
var tcs = new TaskCompletionSource <bool>();
await DispatchHelper.InvokeAsync(CoreDispatcherPriority.Low, async() =>
{
if (thumb != null)
{
image = new WriteableBitmap((int)thumb.OriginalWidth, (int)thumb.OriginalHeight);
await image.SetSourceAsync(thumb);
}
await DownloadAndSaveHelper.WriteableBitmapToStorageFile(image, videoItem.Id.ToString());
videoItem.IsPictureLoaded = true;
tcs.SetResult(true);
});
await tcs.Task;
videoDatabase.Update(videoItem);
return(true);
}
catch (Exception ex)
{
LogHelper.Log(ex.ToString());
}
return(false);
}