// Returns false is no snapshot generation was required, true otherwise
public static async Task <Boolean> GenerateThumbnail(VideoItem videoItem)
{
if (videoItem.HasThumbnail)
{
return(false);
}
try
{
if (Locator.MediaPlaybackViewModel.ContinueIndexing != null)
{
await Locator.MediaPlaybackViewModel.ContinueIndexing.Task;
Locator.MediaPlaybackViewModel.ContinueIndexing = null;
}
#if WINDOWS_PHONE_APP
if (MemoryUsageHelper.PercentMemoryUsed() > MemoryUsageHelper.MaxRamForResourceIntensiveTasks)
{
return(false);
}
#endif
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.File.FileType.ToLower()))
{
thumb = await ThumbsService.GetThumbnail(videoItem.File).ConfigureAwait(false);
}
// If MF thumbnail generation failed or wasn't supported:
if (thumb == null)
{
var res = await ThumbsService.GetScreenshot(videoItem.File).ConfigureAwait(false);
if (res == null)
{
return(true);
}
image = res.Bitmap();
await App.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => videoItem.Duration = TimeSpan.FromMilliseconds(res.Length()));
}
if (thumb != null || image != null)
{
// RunAsync won't await on the lambda it receives, so we need to do it ourselves
var tcs = new TaskCompletionSource <bool>();
await App.Dispatcher.RunAsync(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.ThumbnailPath = String.Format("{0}{1}.jpg", Strings.VideoPicFolderPath, videoItem.Id);
tcs.SetResult(true);
});
await tcs.Task;
}
videoItem.HasThumbnail = true;
return(true);
}
catch (Exception ex)
{
LogHelper.Log(ex.ToString());
}
return(false);
}
