private int fetchNumericMetadata(AVMetadataItem[] metadataItems, NSObject key, string keySpace)
{
AVMetadataItem[] entryMetadataItems = AVMetadataItem.FilterWithKey(metadataItems,
key,
keySpace);
int entry = 0;
if (entryMetadataItems.Length > 0)
{
entry = (int)entryMetadataItems[0].NumberValue;
}
return(entry);
}
private string fetchStringMetadata(AVMetadataItem[] metadataItems, NSObject key, string keySpace)
{
AVMetadataItem[] entryMetadataItems = AVMetadataItem.FilterWithKey(metadataItems,
key,
keySpace);
string entry = null;
if (entryMetadataItems.Length > 0)
{
entry = entryMetadataItems[0].StringValue;
}
return(entry);
}
private byte[] fetchThumbnailData(AVAsset asset)
{
AVMetadataItem[] coverArtMetadataItems = AVMetadataItem.FilterWithKey(asset.CommonMetadata,
AVMetadata.CommonKeyArtwork,
AVMetadata.KeySpaceCommon);
byte[] thumbnailData = null;
if (coverArtMetadataItems.Length > 0)
{
NSData artImageData = (NSData)coverArtMetadataItems[0].Value;
thumbnailData = new byte[artImageData.Length];
Marshal.Copy(artImageData.Bytes, thumbnailData, 0, (int)artImageData.Length);
}
return(thumbnailData);
}
private List <Chapter> fetchChapters(AVAsset asset)
{
List <Chapter> chapters = new List <Chapter>();
string[] preferred = NSLocale.PreferredLanguages;
List <string> languages = new List <string>(preferred);
languages.AddRange(asset.AvailableChapterLocales.Select(locale => locale.Identifier));
AVTimedMetadataGroup[] groups = asset.GetChapterMetadataGroupsBestMatchingPreferredLanguages(languages.ToArray());
foreach (AVTimedMetadataGroup group in groups)
{
AVMetadataItem[] item = AVMetadataItem.FilterWithKey(group.Items, NSObject.FromObject("title"), AVMetadata.KeySpaceCommon);
if ((item != null) && (item.Length > 0))
{
Chapter newChapter = new Chapter();
newChapter.StartTime = item[0].Time.Seconds;
if (item[0].StringValue == "Video")
{
newChapter.Type = ChapterType.Video;
}
else if (item[0].StringValue == "Advertisement")
{
newChapter.Type = ChapterType.Advertisement;
}
else
{
newChapter.Type = ChapterType.Unknown;
}
chapters.Add(newChapter);
}
}
return(chapters);
}
public virtual AVMetadataItem[] ChapterMetadataGroups(NSLocale forLocale, AVMetadataItem[] commonKeys)
{
return null;
}
