public void Load(Stream stream)
{
_thumbnails.Clear();
JsonSerializer serializer = new JsonSerializer();
JObject jRoot;
using (StreamReader reader = new StreamReader(stream))
jRoot = JObject.Load(new JsonTextReader(reader));
JArray jThumbs = jRoot["thumbnails"] as JArray;
foreach (JObject thumb in jThumbs)
{
byte[] image = Convert.FromBase64String(thumb["image"].Value <string>());
JpegBitmapDecoder decoder = new JpegBitmapDecoder(new MemoryStream(image), BitmapCreateOptions.None, BitmapCacheOption.None);
TimeSpan timestamp = TimeSpan.Parse(thumb["time"].Value <string>());
VideoThumbnail thumbnail = new VideoThumbnail
{
Thumbnail = decoder.Frames[0],
Timestamp = timestamp
};
Add(thumbnail);
}
}
public void Add(VideoThumbnail videoThumbnail)
{
for (int i = 0; i < _thumbnails.Count; i++)
{
if (_thumbnails[i].Timestamp > videoThumbnail.Timestamp)
{
_thumbnails.Insert(i, videoThumbnail);
return;
}
}
_thumbnails.Add(videoThumbnail);
}
public VideoThumbnail Get(TimeSpan timestamp)
{
if (_thumbnails.Count == 0)
{
return(null);
}
for (int index = _thumbnails.Count - 1; index >= 0; index--)
{
VideoThumbnail thumbnail = _thumbnails[index];
if (thumbnail.Timestamp <= timestamp)
{
return(thumbnail);
}
}
return(_thumbnails.First());
}