/// <summary>
/// Translates the given JSON object extracted from YouTube to its managed representation.
/// </summary>
protected virtual YouTubeMuxedStream TranslateMuxedStream(JObject input)
{
if (input == null)
{
throw new ArgumentNullException(nameof(input));
}
var result = new YouTubeMuxedStream
{
iTag = input.Value <int?>("itag"),
Type = input.Value <string>("mimeType"),
AudioSampleRate = input.Value <long>("audioSampleRate"),
ContentLength = input.Value <long>("contentLength"),
Quality = input.Value <string>("quality"),
QualityLabel = input.Value <string>("qualityLabel"),
Url = input.Value <string>("url"),
FrameSize = input.ContainsKey("width") && input.ContainsKey("height")
? new Size(input.Value <int>("width"), input.Value <int>("height"))
: null
};
result.Mime = ExtractActualMime(result.Type);
// get cipher info (+signatureCipher)
var cipher = input.Value <string>("cipher") ?? input.Value <string>("signatureCipher");
if (!string.IsNullOrEmpty(cipher))
{
UpdateStreamCipherInfo(result, cipher);
}
return(result);
}
/// <summary>
/// Gets invoked by <see cref="DownloadMetadata"/> to extract muxed streams from metadata.
/// </summary>
protected virtual List <YouTubeMuxedStream> ExtractMuxedStreamsMetadata(List <KeyValuePair <string, string> > fmtStreamMapEntries)
{
var list = new List <YouTubeMuxedStream>();
var propertySet = new HashSet <string>();
var draft = new YouTubeMuxedStream();
void CommitDraft()
{
if (draft?.iTag != null && draft.Url != null)
{
list.Add(draft);
}
propertySet.Clear();
draft = new YouTubeMuxedStream();
}
void Feed(string key, string value)
{
// check for force commit
if (key == null)
{
CommitDraft();
return;
}
// check for rotation
if (propertySet.Contains(key))
{
CommitDraft();
}
propertySet.Add(key);
// update draft
switch (key.ToLowerInvariant())
{
case "itag":
draft.iTag = int.Parse(value);
break;
case "type":
draft.Type = value;
var parts = value.Split(new[] { ';' }, 2, StringSplitOptions.RemoveEmptyEntries);
draft.Mime = parts[0];
break;
case "quality":
draft.Quality = value;
break;
case "url":
draft.Url = value;
break;
case "s":
draft.Signature = value;
break;
}
}
UnmangleEntries(fmtStreamMapEntries, Feed);
return(list);
}
