void handlePersistanceManagerAssetDownloadStateChanged(object sender, MusicAssetDownloadStateChangeArgs e)
{
Log.Debug($"{e.Music.DisplayName} | {e.State}");
BeginInvokeOnMainThread(() =>
{
var cell = TableView.VisibleCells.FirstOrDefault(c => c.TextLabel.Text == e.Music.DisplayName);
if (cell != null)
{
TableView.ReloadRows(new NSIndexPath [] { TableView.IndexPathForCell(cell) }, UITableViewRowAnimation.Automatic);
}
});
}
public override void DidCompleteWithError(NSUrlSession session, NSUrlSessionTask task, NSError error)
{
// This is the ideal place to begin downloading additional media selections
// once the asset itself has finished downloading.
MusicAsset asset;
var assetTask = task as AVAssetDownloadTask;
if (assetTask == null || !activeDownloadsMap.TryGetValue(assetTask, out asset))
{
return;
}
Log.Debug($"Removing {assetTask.TaskDescription} from activeDownloads");
activeDownloadsMap.Remove(assetTask);
if (error != null)
{
Log.Debug($"DidCompleteWithError: {task?.TaskDescription} | {error.Domain} :: {error.LocalizedDescription}");
if (error.Domain == NSError.NSUrlErrorDomain)
{
if (error.Code == (int)NSUrlError.Cancelled)
{
// This task was canceled, you should perform cleanup using the
// URL saved from AVAssetDownloadDelegate.urlSession(_:assetDownloadTask:didFinishDownloadingTo:).
DeleteAsset(asset);
}
else if (error.Code == (int)NSUrlError.Unknown)
{
Log.Debug($"FATAL: Downloading HLS streams is not supported in the simulator.");
//fatalError ("Downloading HLS streams is not supported in the simulator.")
}
}
Log.Debug($"FATAL: An unexpected error occured {error.Domain}");
//fatalError ("An unexpected error occured \(error.domain)")
}
else
{
var change = new MusicAssetDownloadStateChangeArgs(asset.Music);
var mediaSelectionPair = nextMediaSelection(assetTask.UrlAsset);
if (mediaSelectionPair.Item1 != null)
{
// This task did complete sucessfully. At this point the application
// can download additional media selections if needed.
//
// To download additional `AVMediaSelection`s, you should use the
// `AVMediaSelection` reference saved in `AVAssetDownloadDelegate.urlSession(_:assetDownloadTask:didResolve:)`.
AVMediaSelection originalMediaSelection;
if (!mediaSelectionMap.TryGetValue(assetTask, out originalMediaSelection))
{
return;
}
// There are still media selections to download.
//
// Create a mutable copy of the AVMediaSelection reference saved in
// `AVAssetDownloadDelegate.urlSession(_:assetDownloadTask:didResolve:)`.
var mediaSelection = originalMediaSelection.MutableCopy() as AVMutableMediaSelection;
// Select the AVMediaSelectionOption in the AVMediaSelectionGroup we found earlier.
mediaSelection.SelectMediaOption(mediaSelectionPair.Item2, mediaSelectionPair.Item1);
// Ask the `URLSession` to vend a new `AVAssetDownloadTask` using
// the same `AVURLAsset` and assetTitle as before.
//
// This time, the application includes the specific `AVMediaSelection`
// to download as well as a higher bitrate.
// TODO: workaround for bug https://bugzilla.xamarin.com/show_bug.cgi?id=44201 to get it to build in Mobile Center
var taskOptions = new NSDictionary(new NSString("AVAssetDownloadTaskMinimumRequiredMediaBitrateKey"), new NSNumber(2000000), new NSString("AVAssetDownloadTaskMediaSelectionKey"), mediaSelection);
// should be this
// var taskOptions = new AVAssetDownloadOptions { MinimumRequiredMediaBitrate = 2000000, MediaSelection = mediaSelection };
var newTask = assetDownloadURLSession.GetAssetDownloadTask(assetTask.UrlAsset, asset.Id, null, taskOptions);
if (newTask == null)
{
return;
}
activeDownloadsMap [newTask] = asset;
newTask.Resume();
change.State = MusicAssetDownloadState.Downloading;
Log.Debug($"????????? ?????????? ??????????? {mediaSelectionPair.Item2.DisplayName}");
//change.DisplayName = mediaSelectionPair.Item2.DisplayName;
}
else
{
// All additional media selections have been downloaded.
change.State = MusicAssetDownloadState.Downloaded;
}
AssetDownloadStateChanged?.Invoke(this, change);
}
}