public HlsDownloader(HlsMediaPlaylist mediaPlaylist)
{
_mediaPlaylist = mediaPlaylist;
_keyCache = new Dictionary <Uri, byte[]>();
_nextSegment = 0;
}
private void HandleMediaPlaylistLine(string line)
{
if (_isMasterPlaylist.HasValue && _isMasterPlaylist.Value)
{
throw new HlsException("Unexpected tag in media playlist.");
}
if (!_isMasterPlaylist.HasValue)
{
_isMasterPlaylist = false;
_mediaPlaylist = new HlsMediaPlaylist {
Version = _version, IsIndependentSegments = _isIndependentSegments, Start = _start
};
}
if (line[0] != '#')
{
// A URI line for a media segment should be the only case when this happens.
_mediaSegment.Uri = new Uri(_baseUri, line);
_mediaSegment = null;
return;
}
int firstColonIndex = line.IndexOf(':');
string tag = (firstColonIndex > -1 ? line.Substring(1, firstColonIndex - 1) : line.Substring(1));
string value = (firstColonIndex > -1 ? line.Substring(firstColonIndex + 1, line.Length - firstColonIndex - 1) : null);
switch (tag)
{
// Media segment tags.
case "EXTINF":
int commaIndex = value.IndexOf(',');
_mediaSegment = new HlsMediaSegment
{
SequenceNumber = _mediaPlaylist.MediaSequence + _mediaPlaylist._mediaSegments.Count,
Duration = Convert.ToSingle((commaIndex != -1 ? value.Substring(0, commaIndex) : value)),
Title = (commaIndex != -1 ? value.Substring(commaIndex + 1) : null),
Key = _mediaSegmentKey
};
_mediaPlaylist._mediaSegments.Add(_mediaSegment);
break;
case "EXT-X-BYTERANGE":
_mediaSegment.ByteRange = value;
break;
case "EXT-X-DISCONTINUITY":
_mediaSegment.HasDiscontinuityAfter = true;
break;
case "EXT-X-KEY":
IReadOnlyDictionary <string, string> keyAttributes = AttributeList.Parse(value);
_mediaSegmentKey = new HlsMediaSegmentKey
{
Method = AttributeValueUtils.ParseEnum <HlsKeyMethod>(keyAttributes["METHOD"]),
Uri = AttributeValueUtils.GetUriOrNull(keyAttributes, _baseUri, "URI"),
KeyFormat = (AttributeValueUtils.GetStringOrNull(keyAttributes, "KEYFORMAT") ?? "identity"),
};
break;
case "EXT-X-MAP":
break;
case "EXT-X-PROGRAM-DATE-TIME":
_mediaSegment.ProgramDateTime = value;
break;
case "EXT-X-ALLOW-CACHE":
break;
case "EXT-X-DATERANGE":
break;
// Media playlist tags.
case "EXT-X-TARGETDURATION":
_mediaPlaylist.TargetDuration = Convert.ToInt32(value);
break;
case "EXT-X-MEDIA-SEQUENCE":
_mediaPlaylist.MediaSequence = Convert.ToInt32(value);
break;
case "EXT-X-DISCONTINUITY-SEQUENCE":
_mediaPlaylist.DiscontinuitySequence = Convert.ToInt32(value);
break;
case "EXT-X-ENDLIST":
_mediaSegment = null;
HasEndlist = true;
break;
case "EXT-X-PLAYLIST-TYPE":
_mediaPlaylist.PlaylistType = value;
break;
case "EXT-X-I-FRAMES-ONLY":
_mediaPlaylist.IsIFramesOnly = true;
break;
}
}
