private async Task UpdateQueue()
{
if (client is null)
{
return;
}
var stream = await client.GetStreamAsync(Url);
if (stream is null)
{
return;
}
var lastSegment = ParseSegmentFile(stream)?.Last();
if (!lastSegment.Equals(recentSegment))
{
//Debug.WriteLine($"New segment!");
recentSegment = lastSegment;
hlsQueue.Enqueue(lastSegment);
}
}
private static IEnumerable <HLSSegment> ParseSegmentFile(Stream stream)
{
using (var reader = new StreamReader(stream))
{
while (!reader.EndOfStream)
{
var line = reader.ReadLine();
if (line is null)
{
continue;
}
// read normal segment data
if (line.StartsWith("#EXTINF"))
{
var segment = new HLSSegment();
segment.Duration = GetDuration(line);
// read next line with url
line = reader.ReadLine();
// skip if this line isn't link
if (line == null || !line.StartsWith("https"))
{
continue;
}
segment.Url = line;
yield return(segment);
}
// read prefetch
if (line.StartsWith("#EXT-X-TWITCH-PREFETCH"))
{
var segment = new HLSSegment();
segment.Prefetch = true;
var match = Regex.Match(line, ext_twitch_prefetch_re);
if (match.Success)
{
segment.Url = match.Groups[1].Value;
}
yield return(segment);
}
}
}
}
