public async Task <IDictionary <long, Program> > LoadAsync(CancellationToken cancellationToken) { ICollection <Uri> playlists = this.Playlists; IDictionary <long, Program> dictionary; foreach (Uri uri in (IEnumerable <Uri>)playlists) { try { M3U8Parser parser = new M3U8Parser(); if (null != this._playlistWebReader) { this._playlistWebReader.Dispose(); } this._playlistWebReader = this._webReaderManager.CreateReader(uri, ContentKind.Playlist, (IWebReader)null, (ContentType)null); Uri actualPlaylist = await M3U8ParserExtensions.ParseAsync(parser, this._playlistWebReader, this._retryManager, uri, cancellationToken).ConfigureAwait(false); dictionary = await this.LoadAsync(this._playlistWebReader, parser, cancellationToken); goto label_14; } catch (WebException ex) { Debug.WriteLine("HlsProgramManager.LoadAsync: " + ex.Message); } } dictionary = HlsProgramManager.NoPrograms; label_14: return(dictionary); }
private async Task <M3U8Parser> FetchPlaylistAsync(CancellationToken cancellationToken) { ICollection <Uri> urls = this.Urls; M3U8Parser m3U8Parser; if (urls == null || urls.Count < 1) { m3U8Parser = (M3U8Parser)null; } else { foreach (Uri playlist in (IEnumerable <Uri>)urls) { this.UpdateSubPlaylistCache(playlist); cancellationToken.ThrowIfCancellationRequested(); WebResponse webResponse = (WebResponse)null; if (null == this.StreamMetadata) { webResponse = new WebResponse(); } M3U8Parser parsedPlaylist = await this._subPlaylistCache.ReadAsync <M3U8Parser>((Func <Uri, byte[], M3U8Parser>)((actualUri, bytes) => { cancellationToken.ThrowIfCancellationRequested(); if (bytes.Length < 1) { return((M3U8Parser)null); } M3U8Parser parser = new M3U8Parser(); using (MemoryStream memoryStream = new MemoryStream(bytes)) M3U8ParserExtensions.Parse(parser, actualUri, (Stream)memoryStream, (Encoding)null); return(parser); }), cancellationToken, webResponse).ConfigureAwait(false); if (null != parsedPlaylist) { if (null != webResponse) { this.StreamMetadata = this._webMetadataFactory.CreateStreamMetadata(webResponse, (ContentType)null); } m3U8Parser = parsedPlaylist; goto label_16; } } m3U8Parser = (M3U8Parser)null; } label_16: return(m3U8Parser); }
private ISegment CreateStreamSegment(M3U8Parser.M3U8Uri uri, CancellationToken cancellationToken) { SubStreamSegment segment = new SubStreamSegment(M3U8ParserExtensions.ResolveUrl(this._parser, uri.Uri), this._parser.BaseUrl); if (this._mediaSequence.HasValue) { SubStreamSegment subStreamSegment = segment; long? nullable1 = this._mediaSequence; long num = (long)this._segmentIndex; long? nullable2 = nullable1.HasValue ? new long?(nullable1.GetValueOrDefault() + num) : new long?(); subStreamSegment.MediaSequence = nullable2; } ++this._segmentIndex; M3U8TagInstance[] m3U8TagInstanceArray = uri.Tags; if (m3U8TagInstanceArray == null || 0 == m3U8TagInstanceArray.Length) { return((ISegment)segment); } ExtinfTagInstance extinfTagInstance = M3U8Tags.ExtXInf.Find((IEnumerable <M3U8TagInstance>)m3U8TagInstanceArray); if (null != extinfTagInstance) { segment.Duration = new TimeSpan?(TimeSpan.FromSeconds((double)extinfTagInstance.Duration)); } ByterangeTagInstance byteRange = M3U8Tags.ExtXByteRange.Find((IEnumerable <M3U8TagInstance>)m3U8TagInstanceArray); if (null != byteRange) { this.HandleByteRange(segment, byteRange); } IEnumerable <ExtKeyTagInstance> all = M3U8Tags.ExtXKey.FindAll((IEnumerable <M3U8TagInstance>)m3U8TagInstanceArray); if (null != all) { this.HandleKey(segment, all, cancellationToken); } return((ISegment)segment); }
private void HandleKey(SubStreamSegment segment, IEnumerable <ExtKeyTagInstance> extKeys, CancellationToken cancellationToken) { ExtKeyTagInstance[] extKeyTagInstanceArray = Enumerable.ToArray <ExtKeyTagInstance>(extKeys); if (extKeyTagInstanceArray.Length < 1) { return; } string url = (string)null; byte[] iv = (byte[])null; foreach (ExtKeyTagInstance extKeyTagInstance in extKeyTagInstanceArray) { string b = M3U8TagInstanceExtensions.AttributeObject <string>((M3U8TagInstance)extKeyTagInstance, ExtKeySupport.AttrMethod); if (string.Equals("NONE", b, StringComparison.OrdinalIgnoreCase)) { url = (string)null; } else { if (!string.Equals("AES-128", b, StringComparison.OrdinalIgnoreCase)) { if (string.Equals("SAMPLE-AES", b, StringComparison.OrdinalIgnoreCase)) { throw new NotImplementedException("Method SAMPLE-AES decryption is not implemented"); } throw new NotSupportedException("Unknown decryption method type: " + b); } string str = M3U8TagInstanceExtensions.AttributeObject <string>((M3U8TagInstance)extKeyTagInstance, ExtKeySupport.AttrUri); if (null != str) { url = str; } byte[] numArray = M3U8TagInstanceExtensions.AttributeObject <byte[]>((M3U8TagInstance)extKeyTagInstance, ExtKeySupport.AttrIv); if (null != numArray) { iv = numArray; } } } if (null == url) { return; } if (null == iv) { iv = new byte[16]; long num = segment.MediaSequence ?? (long)(this._segmentIndex - 1); iv[15] = (byte)((ulong)num & (ulong)byte.MaxValue); iv[14] = (byte)((ulong)(num >> 8) & (ulong)byte.MaxValue); iv[13] = (byte)((ulong)(num >> 16) & (ulong)byte.MaxValue); iv[12] = (byte)((ulong)(num >> 24) & (ulong)byte.MaxValue); } Func <Stream, CancellationToken, Task <Stream> > filter = segment.AsyncStreamFilter; Uri uri = M3U8ParserExtensions.ResolveUrl(this._parser, url); segment.AsyncStreamFilter = (Func <Stream, CancellationToken, Task <Stream> >)(async(stream, ct) => { if (null != filter) { stream = await filter(stream, ct).ConfigureAwait(false); } byte[] key; if (!this._keyCache.TryGetValue(uri, out key)) { key = await this.LoadKeyAsync(uri, cancellationToken).ConfigureAwait(false); if (16 != key.Length) { throw new FormatException("AES-128 key length mismatch: " + (object)key.Length); } this._keyCache[uri] = key; } Debug.WriteLine("Segment AES-128: key {0} iv {1}", (object)BitConverter.ToString(key), (object)BitConverter.ToString(iv)); return(this._platformServices.Aes128DecryptionFilter(stream, key, iv)); }); }
private async Task <IDictionary <long, Program> > LoadAsync(IWebReader webReader, M3U8Parser parser, CancellationToken cancellationToken) { Dictionary <string, HlsProgramManager.MediaGroup> audioStreams = new Dictionary <string, HlsProgramManager.MediaGroup>(); foreach (M3U8TagInstance m3U8TagInstance in parser.GlobalTags) { if (M3U8Tags.ExtXMedia == m3U8TagInstance.Tag) { try { if (null != M3U8TagInstanceExtensions.Attribute <string>(m3U8TagInstance, ExtMediaSupport.AttrType, "AUDIO")) { HlsProgramManager.AddMedia(parser.BaseUrl, m3U8TagInstance, audioStreams); } } catch (NullReferenceException ex) { } } } Dictionary <long, Program> programs = new Dictionary <long, Program>(); bool hasSegments = false; foreach (M3U8Parser.M3U8Uri m3U8Uri in parser.Playlist) { if (m3U8Uri.Tags == null || m3U8Uri.Tags.Length < 1) { hasSegments = true; } else { ExtStreamInfTagInstance streamInfTagInstance = M3U8Tags.ExtXStreamInf.Find((IEnumerable <M3U8TagInstance>)m3U8Uri.Tags); long programId = long.MinValue; HlsProgramManager.MediaGroup mediaGroup = (HlsProgramManager.MediaGroup)null; if (null != streamInfTagInstance) { M3U8AttributeValueInstance <long> attributeValueInstance1 = M3U8TagInstanceExtensions.Attribute <long>((M3U8TagInstance)streamInfTagInstance, ExtStreamInfSupport.AttrProgramId); if (null != attributeValueInstance1) { programId = attributeValueInstance1.Value; } string key = M3U8TagInstanceExtensions.AttributeObject <string>((M3U8TagInstance)streamInfTagInstance, ExtStreamInfSupport.AttrAudio); if (null != key) { audioStreams.TryGetValue(key, out mediaGroup); } Uri uri = M3U8ParserExtensions.ResolveUrl(parser, m3U8Uri.Uri); M3U8AttributeValueInstance <long> attributeValueInstance2 = M3U8TagInstanceExtensions.Attribute <long>((M3U8TagInstance)streamInfTagInstance, ExtStreamInfSupport.AttrBandwidth); ResolutionAttributeInstance attributeInstance = M3U8TagInstanceExtensions.AttributeInstance <ResolutionAttributeInstance>((M3U8TagInstance)streamInfTagInstance, ExtStreamInfSupport.AttrResolution); Uri baseUrl = parser.BaseUrl; Program program = HlsProgramManager.GetProgram((IDictionary <long, Program>)programs, programId, baseUrl); IHlsProgramStream hlsProgramStream = this._programStreamFactory.Create((ICollection <Uri>) new Uri[1] { uri }, webReader); PlaylistSubProgram playlistSubProgram1 = new PlaylistSubProgram((IProgram)program, (IProgramStream)hlsProgramStream); playlistSubProgram1.Bandwidth = attributeValueInstance2 == null ? 0L : attributeValueInstance2.Value; playlistSubProgram1.Playlist = uri; playlistSubProgram1.AudioGroup = mediaGroup; PlaylistSubProgram playlistSubProgram2 = playlistSubProgram1; if (null != attributeInstance) { playlistSubProgram2.Width = new int?(attributeInstance.X); playlistSubProgram2.Height = new int?(attributeInstance.Y); } program.SubPrograms.Add((ISubProgram)playlistSubProgram2); } else { hasSegments = true; } } } if (hasSegments) { Program program = HlsProgramManager.GetProgram((IDictionary <long, Program>)programs, long.MinValue, parser.BaseUrl); IHlsProgramStream hlsProgramStream = this._programStreamFactory.Create((ICollection <Uri>) new Uri[1] { webReader.RequestUri }, webReader); await hlsProgramStream.SetParserAsync(parser, cancellationToken).ConfigureAwait(false); PlaylistSubProgram subProgram = new PlaylistSubProgram((IProgram)program, (IProgramStream)hlsProgramStream); program.SubPrograms.Add((ISubProgram)subProgram); } return((IDictionary <long, Program>)programs); }