private void UpdateContentProperties()
{
//update content properties and reload the file (since header size might have changed)
var contentProperties = _asfObjects.OfType <AsfFileHeaderItem>().First().Items.OfType <AsfContentDescriptionObjectItem>().FirstOrDefault();
try
{
AsfFile.From(FileName)
.WithAuthor(contentProperties.EditProperties.Single(x => x.Key == "Author").Value)
.WithDescription(contentProperties.EditProperties.Single(x => x.Key == "Description").Value)
.WithCopyright(contentProperties.EditProperties.Single(x => x.Key == "Copyright").Value)
.WithTitle(contentProperties.EditProperties.Single(x => x.Key == "Title").Value)
.WithRating(contentProperties.EditProperties.Single(x => x.Key == "Rating").Value)
.Update();
LoadFile(FileName);
}
catch (IOException)
{
FileErrorDetails.Clear();
FileErrorDetails.Add(new FileErrorInfo()
{
ErrorType = "Update Failed", ErrorDetails = "File is in use by another process"
});
Dispatcher.DelayInvoke(TimeSpan.FromMilliseconds(500),
new Action(() =>
{
ErrorDetailsVisible = true;
IsBusy = false;
RaisePropertyChanged("IsBusy");
RaisePropertyChanged("ErrorDetailsVisible");
}));
}
}
private void LoadFile(string fileName)
{
FileErrorDetails.Clear();
_asfObjects.Clear();
TimeToImageConverter.EmptyCache();
var asfItems = AsfInfo.GetHeaderObjects(fileName);
if (asfItems == null) //invalid file
{
FileErrorDetails.Add(new FileErrorInfo()
{
ErrorType = "Invalid ASF file", ErrorDetails = "No Header Object found"
});
Dispatcher.DelayInvoke(TimeSpan.FromMilliseconds(500),
new Action(() =>
{
ErrorDetailsVisible = true;
IsBusy = false;
RaisePropertyChanged("IsBusy");
RaisePropertyChanged("ErrorDetailsVisible");
}));
}
else
{
foreach (AsfHeaderItem asfItem in asfItems)
{
_asfObjects.Add(asfItem);
}
double fileLength = AsfHeaderItem.Configuration.Duration;
HasVideoStream = AsfHeaderItem.Configuration.ImageWidth > 0;
_previewImagesLoadedCount = 0;
_previewImages.Clear();
_loadingImages = new List <PreviewImage>();
if (HasVideoStream)
{
for (int i = 0; i < _thumbCount; i++)
{
double startOffset = ((double)i / _thumbCount) * fileLength;
PreviewImage pi = new PreviewImage()
{
FileName = fileName,
TimeOffset = startOffset,
DisplayTime = (uint)(startOffset * 1000),
PresentationTime = (uint)(startOffset * 1000) + AsfHeaderItem.Configuration.AsfPreroll
};
Action a = new Action(pi.GenerateSource);
_loadingImages.Add(pi);
a.BeginInvoke(new AsyncCallback(PreviewImageLoaded), a);
}
}
RaisePropertyChanged("Title");
Dispatcher.DelayInvoke(TimeSpan.FromMilliseconds(500),
new Action(() =>
{
IsBusy = false;
IsFileLoaded = true;
PreviewVisible = HasVideoStream;
RaisePropertyChanged("IsBusy");
RaisePropertyChanged("PreviewVisible");
RaisePropertyChanged("HasVideoStream");
}));
}
}