// Return the display names for the media selection options that are currently selected in the specified group
private string GetDisplayNamesForSelectedMediaOptions(AVMediaSelection mediaSelection)
{
string displayNames = string.Empty;
var asset = mediaSelection.Asset;
if (asset == null)
{
return(displayNames);
}
foreach (var mediaCharacteristic in asset.AvailableMediaCharacteristicsWithMediaSelectionOptions)
{
/*
* Obtain the AVMediaSelectionGroup object that contains one or more options with the
* specified media characteristic, then get the media selection option that's currently
* selected in the specified group.
*/
var mediaSelectionGroup = asset.MediaSelectionGroupForMediaCharacteristic(mediaCharacteristic);
var option = mediaSelection.GetSelectedMediaOption(mediaSelectionGroup);
// Obtain the display string for the media selection option
displayNames += string.IsNullOrWhiteSpace(displayNames) ? " " + option.DisplayName : ", " + option.DisplayName;
}
return(displayNames);
}
public override void DidResolveMediaSelection(NSUrlSession session, AVAssetDownloadTask assetDownloadTask, AVMediaSelection resolvedMediaSelection)
{
Log.Debug($"DidResolveMediaSelection: {assetDownloadTask?.TaskDescription} | {resolvedMediaSelection.Asset}");
// You should be sure to use this delegate callback to keep a reference
// to `resolvedMediaSelection` so that in the future you can use it to
// download additional media selections.
mediaSelectionMap [assetDownloadTask] = resolvedMediaSelection;
}
public static void DidResolveMediaSelection(this IAVAssetDownloadDelegate This, NSUrlSession session, AVAssetDownloadTask assetDownloadTask, AVMediaSelection resolvedMediaSelection)
{
throw new NotImplementedException();
}
public virtual void DidResolveMediaSelection(NSUrlSession session, AVAssetDownloadTask assetDownloadTask, AVMediaSelection resolvedMediaSelection)
{
throw new NotImplementedException();
}
public void DidLoadTimeRange(NSUrlSession session, AVAggregateAssetDownloadTask aggregateAssetDownloadTask, CoreMedia.CMTimeRange timeRange, NSValue[] loadedTimeRanges, CoreMedia.CMTimeRange timeRangeExpectedToLoad, AVMediaSelection mediaSelection)
{
// This delegate callback should be used to provide download progress for your AVAssetDownloadTask.
if (!activeDownloadsMap.ContainsKey(aggregateAssetDownloadTask))
{
return;
}
var asset = activeDownloadsMap[aggregateAssetDownloadTask];
var percentComplete = 0.0;
foreach (var value in loadedTimeRanges)
{
var loadedTimeRange = value.CMTimeRangeValue;
percentComplete += loadedTimeRange.Duration.Seconds / timeRangeExpectedToLoad.Duration.Seconds;
}
var userInfo = new Dictionary <string, object>();
userInfo[Asset.Keys.Name] = new NSString(asset.Stream.Name);
userInfo[Asset.Keys.PercentDownloaded] = new NSNumber(percentComplete);
var userInfoDictionary = NSDictionary.FromObjectsAndKeys(userInfo.Values.ToArray(), userInfo.Keys.ToArray());
NSNotificationCenter.DefaultCenter.PostNotificationName(AssetPersistenceManager.AssetDownloadProgress, null, userInfoDictionary);
}
public void DidCompleteForMediaSelection(NSUrlSession session, AVAggregateAssetDownloadTask aggregateAssetDownloadTask, AVMediaSelection mediaSelection)
{
/*
* This delegate callback provides an AVMediaSelection object which is now fully available for
* offline use. You can perform any additional processing with the object here.
*/
Asset asset = null;
activeDownloadsMap.TryGetValue(aggregateAssetDownloadTask, out asset);
if (asset == null || Asset.Keys.Name != asset.Stream.Name)
{
return;
}
aggregateAssetDownloadTask.TaskDescription = asset.Stream.Name;
aggregateAssetDownloadTask.Resume();
var userInfo = new Dictionary <string, string>();
userInfo[Asset.Keys.DownloadState] = new NSString(Asset.Keys.DownloadState.ToString());
userInfo[Asset.Keys.DownloadSelectionDisplayName] = new NSString(GetDisplayNamesForSelectedMediaOptions(mediaSelection));
var userInfoDictionary = NSDictionary.FromObjectsAndKeys(userInfo.Values.ToArray(), userInfo.Keys.ToArray());
NSNotificationCenter.DefaultCenter.PostNotificationName(AssetPersistenceManager.AssetDownloadStateChanged, null, userInfoDictionary);
}
