public async Task<IDictionary<long, Program>> LoadAsync(ContentType contentType, CancellationToken cancellationToken)
{
var playlists = Playlists;
foreach (var playlist in playlists)
{
try
{
var parser = new M3U8Parser();
if (null != _playlistWebReader)
_playlistWebReader.Dispose();
_playlistWebReader = _webReaderManager.CreateReader(playlist, ContentKind.Playlist, contentType: contentType);
var actualPlaylist = await parser.ParseAsync(_playlistWebReader, _retryManager, playlist, cancellationToken)
.ConfigureAwait(false);
return await LoadAsync(_playlistWebReader, parser, contentType, cancellationToken).ConfigureAwait(false);
}
catch (StatusCodeWebException e)
{
// This one didn't work, so try the next playlist url.
Debug.WriteLine("HlsProgramManager.LoadAsync: " + e.Message);
}
}
return NoPrograms;
}
public static void Parse(this M3U8Parser parser, Uri baseUrl, Stream stream, Encoding encoding = null)
{
if (null == encoding)
{
encoding = UriExtensions.HasExtension(baseUrl, ".m3u") ? SmEncodings.Latin1 : Encoding.UTF8;
}
using (StreamReader streamReader = new StreamReader(stream, encoding))
M3U8ParserExtensions.Parse(parser, baseUrl, (TextReader)streamReader);
}
public static Task <Uri> ParseAsync(this M3U8Parser parser, IWebReader webReader, IRetryManager retryManager, Uri playlist, CancellationToken cancellationToken)
{
IRetry retry = RetryManagerExtensions.CreateWebRetry(retryManager, 2, 250);
return(retry.CallAsync <Uri>((Func <Task <Uri> >)(() => WebReaderExtensions.ReadStreamAsync <Uri>(webReader, playlist, retry, (Func <Uri, Stream, Uri>)((actualPlaylist, stream) =>
{
M3U8ParserExtensions.Parse(parser, actualPlaylist, stream, (Encoding)null);
return actualPlaylist;
}), cancellationToken)), cancellationToken));
}
/// <summary>
/// A playlist is dynamic if it does not have an #EXT-X-ENDLIST tag and every segment has an #EXTINF with a valid
/// duration.
/// </summary>
/// <param name="parser"></param>
/// <returns></returns>
public static bool IsDynamicPlayist(M3U8Parser parser)
{
if (null != parser.GlobalTags.Tag(M3U8Tags.ExtXEndList))
return false;
var validDuration = parser.Playlist.All(
p =>
{
var extInf = M3U8Tags.ExtXInf.Find(p.Tags);
return null != extInf && extInf.Duration >= 0;
});
return validDuration;
}
public HlsStreamSegments(M3U8Parser parser, IWebReader webReader, IRetryManager retryManager, IPlatformServices platformServices)
{
if (null == parser)
throw new ArgumentNullException(nameof(parser));
if (null == webReader)
throw new ArgumentNullException(nameof(webReader));
if (null == retryManager)
throw new ArgumentNullException(nameof(retryManager));
if (null == platformServices)
throw new ArgumentNullException(nameof(platformServices));
_parser = parser;
_webReader = webReader;
_retryManager = retryManager;
_platformServices = platformServices;
_mediaSequence = M3U8Tags.ExtXMediaSequence.GetValue<long>(parser.GlobalTags);
}
public IDictionary<long, Program> Load(Uri playlist)
{
using (var f = new WebClient().OpenRead(playlist))
{
var parser = new M3U8Parser();
parser.Parse(playlist, f);
var audioStreams = new Dictionary<string, MediaGroup>();
foreach (var gt in parser.GlobalTags)
{
if (M3U8Tags.ExtXMedia == gt.Tag)
{
try
{
var audioAttribute = gt.Attribute(ExtMediaSupport.AttrType, "AUDIO");
if (null != audioAttribute)
{
var group = gt.Attribute(ExtMediaSupport.AttrGroupId).Value;
var urlAttribute = gt.AttributeObject(ExtMediaSupport.AttrUri);
Uri playlistUrl = null;
if (null != urlAttribute)
playlistUrl = new Uri(playlist, new Uri(urlAttribute, UriKind.RelativeOrAbsolute));
var audioStream = new PlaylistSubStream
{
Name = group,
Playlist = playlistUrl
};
MediaGroup mediaGroup;
if (!audioStreams.TryGetValue(group, out mediaGroup))
{
mediaGroup = new MediaGroup { Default = audioStream };
audioStreams[group] = mediaGroup;
}
var isDefault = 0 == string.CompareOrdinal("YES", gt.Attribute(ExtMediaSupport.AttrDefault).Value);
if (isDefault)
mediaGroup.Default = audioStream;
var name = gt.Attribute(ExtMediaSupport.AttrName).Value;
mediaGroup.Streams[name] = audioStream;
}
}
catch (NullReferenceException)
{
// DynamicObject isn't welcome on the phone or this would be a binding exception.
}
}
}
var programs = new Dictionary<long, Program>();
SimpleSubProgram simpleSubProgram = null;
foreach (var p in parser.Playlist)
{
var streamInf = p.Tags.FirstOrDefault(t => M3U8Tags.ExtXStreamInf == t.Tag);
var programId = long.MinValue;
MediaGroup audioGroup = null;
if (null != streamInf)
{
var programIdAttribute = streamInf.Attribute(ExtStreamInfSupport.AttrProgramId);
if (null != programIdAttribute)
programId = programIdAttribute.Value;
var audioAttribute = streamInf.AttributeObject(ExtStreamInfSupport.AttrAudio);
if (null != audioAttribute)
audioStreams.TryGetValue(audioAttribute, out audioGroup);
var subProgram = new PlaylistSubProgram
{
Bandwidth = streamInf.Attribute(ExtStreamInfSupport.AttrBandwidth).Value,
Playlist = new Uri(playlist, new Uri(p.Uri, UriKind.RelativeOrAbsolute)),
Audio = audioGroup
};
Program program;
if (!programs.TryGetValue(programId, out program))
{
program = new Program { ProgramId = programId };
programs[programId] = program;
}
program.SubPrograms.Add(subProgram);
}
else
{
var extInf = (ExtinfTagInstance)p.Tags.FirstOrDefault(t => M3U8Tags.ExtXInf == t.Tag);
if (null != extInf)
{
if (null == simpleSubProgram)
{
simpleSubProgram = new SimpleSubProgram();
var program = new Program { ProgramId = long.MinValue };
program.SubPrograms.Add(simpleSubProgram);
programs[program.ProgramId] = program;
}
simpleSubProgram.Segments.Add(new XSegment
{
Url = new Uri(playlist, new Uri(p.Uri, UriKind.RelativeOrAbsolute)),
Duration = TimeSpan.FromSeconds((double)extInf.Duration)
});
}
}
}
return programs;
}
}
public override IEnumerable<XSegment> GetPlaylist(SubStream audio = null)
{
var playlist = Playlist;
if (null == playlist)
yield break;
var parser = new M3U8Parser();
using (var f = new WebClient().OpenRead(playlist))
{
parser.Parse(playlist, f);
Uri previous = null;
foreach (var p in parser.Playlist)
{
var url = new Uri(playlist, new Uri(p.Uri, UriKind.RelativeOrAbsolute));
if (null != previous && url == previous)
continue;
yield return new XSegment { Url = url };
previous = url;
}
}
}
public IHlsStreamSegments Create(M3U8Parser parser, IWebReader webReader)
{
return new HlsStreamSegments(parser, webReader, _retryManager, _platformServices);
}
public Task<ICollection<ISegment>> CreateSegmentsAsync(M3U8Parser parser, IWebReader webReader, CancellationToken cancellationToken)
{
var streamSegments = _streamSegmentsFactory.Create(parser, webReader);
return streamSegments.CreateSegmentsAsync(cancellationToken);
}
async Task<M3U8Parser> FetchPlaylistAsync(CancellationToken cancellationToken)
{
var urls = Urls;
if (null == urls || urls.Count < 1)
return null;
foreach (var playlist in urls)
{
UpdateSubPlaylistCache(playlist);
cancellationToken.ThrowIfCancellationRequested();
WebResponse webResponse = null;
if (null == StreamMetadata)
webResponse = new WebResponse();
var parsedPlaylist = await _subPlaylistCache.ReadAsync(
(actualUri, bytes) =>
{
cancellationToken.ThrowIfCancellationRequested();
if (bytes.Length < 1)
return null;
var parser = new M3U8Parser();
using (var ms = new MemoryStream(bytes))
{
parser.Parse(actualUri, ms);
}
return parser;
}, cancellationToken, webResponse)
.ConfigureAwait(false);
if (null != parsedPlaylist)
{
if (null != webResponse)
StreamMetadata = _webMetadataFactory.CreateStreamMetadata(webResponse);
return parsedPlaylist;
}
}
return null;
}
async Task UpdateAsync(M3U8Parser parser, CancellationToken cancellationToken)
{
_segments = await _segmentsFactory.CreateSegmentsAsync(parser, _subPlaylistCache.WebReader, cancellationToken).ConfigureAwait(false);
_isDynamicPlaylist = HlsPlaylistSettings.Parameters.IsDynamicPlaylist(parser);
_actualUrl = parser.BaseUrl;
}
ISegment CreateStreamSegment(M3U8Parser.M3U8Uri uri, CancellationToken cancellationToken)
{
var url = _parser.ResolveUrl(uri.Uri);
var segment = new SubStreamSegment(url, _parser.BaseUrl);
if (_mediaSequence.HasValue)
segment.MediaSequence = _mediaSequence + _segmentIndex;
++_segmentIndex;
var tags = uri.Tags;
if (null == tags || 0 == tags.Length)
return segment;
var info = M3U8Tags.ExtXInf.Find(tags);
if (null != info)
segment.Duration = TimeSpan.FromSeconds((double)info.Duration);
var byteRange = M3U8Tags.ExtXByteRange.Find(tags);
if (null != byteRange)
HandleByteRange(segment, byteRange);
var extKeys = M3U8Tags.ExtXKey.FindAll(tags);
if (null != extKeys)
HandleKey(segment, extKeys, cancellationToken);
return segment;
}
async Task<IDictionary<long, Program>> LoadAsync(IWebReader webReader, M3U8Parser parser, ContentType contentType, CancellationToken cancellationToken)
{
var audioStreams = new Dictionary<string, MediaGroup>();
foreach (var gt in parser.GlobalTags)
{
if (M3U8Tags.ExtXMedia == gt.Tag)
{
try
{
var audioAttribute = gt.Attribute(ExtMediaSupport.AttrType, "AUDIO");
if (null != audioAttribute)
AddMedia(parser.BaseUrl, gt, audioStreams);
}
catch (NullReferenceException)
{
// DynamicObject isn't welcome on the phone or this would be a binding exception.
}
}
}
var programs = new Dictionary<long, Program>();
var hasSegments = false;
foreach (var p in parser.Playlist)
{
if (null == p.Tags || p.Tags.Length < 1)
{
hasSegments = true;
continue;
}
var streamInf = M3U8Tags.ExtXStreamInf.Find(p.Tags);
var programId = long.MinValue;
MediaGroup audioGroup = null;
if (null != streamInf)
{
var programIdAttribute = streamInf.Attribute(ExtStreamInfSupport.AttrProgramId);
if (null != programIdAttribute)
programId = programIdAttribute.Value;
var audioAttribute = streamInf.AttributeObject(ExtStreamInfSupport.AttrAudio);
if (null != audioAttribute)
audioStreams.TryGetValue(audioAttribute, out audioGroup);
var playlistUrl = parser.ResolveUrl(p.Uri);
var bandwidth = streamInf.Attribute(ExtStreamInfSupport.AttrBandwidth);
var resolution = streamInf.AttributeInstance<ResolutionAttributeInstance>(ExtStreamInfSupport.AttrResolution);
var programUrl = parser.BaseUrl;
var program = GetProgram(programs, programId, programUrl);
var hlsProgramStream = _programStreamFactory.Create(new[] { playlistUrl }, webReader, ContentType, StreamContentType);
var subProgram = new PlaylistSubProgram(program, hlsProgramStream)
{
Bandwidth = null == bandwidth ? 0 : bandwidth.Value,
Playlist = playlistUrl,
AudioGroup = audioGroup
};
if (null != resolution)
{
subProgram.Width = resolution.X;
subProgram.Height = resolution.Y;
}
program.SubPrograms.Add(subProgram);
}
else
hasSegments = true;
}
if (hasSegments)
{
var program = GetProgram(programs, long.MinValue, parser.BaseUrl);
var hlsProgramStream = _programStreamFactory.Create(new[] { webReader.RequestUri }, webReader, ContentType, StreamContentType);
await hlsProgramStream.SetParserAsync(parser, cancellationToken).ConfigureAwait(false);
var subProgram = new PlaylistSubProgram(program, hlsProgramStream);
program.SubPrograms.Add(subProgram);
}
return programs;
}
public static void Parse(this M3U8Parser parser, Uri baseUrl, TextReader textReader)
{
parser.Parse(baseUrl, M3U8ParserExtensions.GetExtendedLines(textReader));
}
static void Main(string[] args)
{
if (args.Length < 1)
return;
try
{
using (var programManager = new ProgramManager())
{
foreach (var arg in args)
{
var programs = programManager.Load(new Uri(arg));
foreach (var program in programs.Values)
{
foreach (var subProgram in program.SubPrograms)
{
foreach (var segment in subProgram.GetPlaylist())
{
Debug.WriteLine("Segment: {0}", segment.Url);
}
}
}
Console.WriteLine("Reading {0}", arg);
var url = new Uri(arg);
using (var f = new WebClient().OpenRead(url))
{
var parser = new M3U8Parser();
parser.Parse(url, f);
}
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}
public Task SetParserAsync(M3U8Parser parser, CancellationToken cancellationToken)
{
UpdateSubPlaylistCache(parser.BaseUrl);
return UpdateAsync(parser, cancellationToken);
}
public static Uri ResolveUrl(this M3U8Parser parser, string url)
{
return(parser.ResolveUrl(new Uri(url, UriKind.RelativeOrAbsolute)));
}
