public ParsedContent Read(Stream stream) { if (stream.Length - stream.Position <= 0) { throw new EndOfStreamException(); } var res = new ParsedContent(); var pos = Channel.ContentPosition; if (Channel.ContentHeader == null) { res.ContentHeader = new Content(pos, new byte[] { }); var channel_info = new AtomCollection(Channel.ChannelInfo.Extra); channel_info.SetChanInfoType("RAW"); channel_info.SetChanInfoStreamType("application/octet-stream"); channel_info.SetChanInfoStreamExt(""); res.ChannelInfo = new ChannelInfo(channel_info); } res.Contents = new List <Content>(); while (stream.Length - stream.Position > 0) { var bytes = new byte[Math.Min(8192, stream.Length - stream.Position)]; var sz = stream.Read(bytes, 0, bytes.Length); if (sz > 0) { Array.Resize(ref bytes, sz); res.Contents.Add(new Content(pos, bytes)); pos += sz; } } return(res); }
public ParsedContent Read(Stream stream) { if (stream.Length-stream.Position<=0) throw new EndOfStreamException(); var res = new ParsedContent(); var pos = Channel.ContentPosition; if (Channel.ContentHeader==null) { streamIndex = Channel.GenerateStreamID(); streamOrigin = DateTime.Now; res.ContentHeader = new Content(streamIndex, TimeSpan.Zero, pos, new byte[] { }); var channel_info = new AtomCollection(Channel.ChannelInfo.Extra); channel_info.SetChanInfoType("RAW"); channel_info.SetChanInfoStreamType("application/octet-stream"); channel_info.SetChanInfoStreamExt(""); res.ChannelInfo = new ChannelInfo(channel_info); } res.Contents = new List<Content>(); while (stream.Length-stream.Position>0) { var bytes = new byte[Math.Min(8192, stream.Length-stream.Position)]; var sz = stream.Read(bytes, 0, bytes.Length); if (sz>0) { Array.Resize(ref bytes, sz); res.Contents.Add(new Content(streamIndex, DateTime.Now-streamOrigin, pos, bytes)); pos += sz; } } return res; }
public ParsedContent Read(Stream stream) { var chunks = 0; var res = new ParsedContent(); var pos = Channel.ContentPosition; try { while (chunks<8) { var chunk = ASFChunk.Read(stream); chunks++; switch (chunk.KnownType) { case ASFChunk.ChunkType.Header: { var header = ASFHeader.Read(chunk); var info = new AtomCollection(Channel.ChannelInfo.Extra); info.SetChanInfoBitrate(header.Bitrate); if (header.Streams.Any(type => type==ASFHeader.StreamType.Video)) { info.SetChanInfoType("WMV"); info.SetChanInfoStreamType("video/x-ms-wmv"); info.SetChanInfoStreamExt(".wmv"); } else if (header.Streams.Any(type => type==ASFHeader.StreamType.Audio)) { info.SetChanInfoType("WMA"); info.SetChanInfoStreamType("audio/x-ms-wma"); info.SetChanInfoStreamExt(".wma"); } else { info.SetChanInfoType("ASF"); info.SetChanInfoStreamType("video/x-ms-asf"); info.SetChanInfoStreamExt(".asf"); } res.ChannelInfo = new ChannelInfo(info); streamIndex = Channel.GenerateStreamID(); streamOrigin = DateTime.Now; res.ContentHeader = new Content(streamIndex, TimeSpan.Zero, pos, chunk.ToByteArray()); pos += chunk.TotalLength; } break; case ASFChunk.ChunkType.Data: if (res.Contents==null) res.Contents = new System.Collections.Generic.List<Content>(); res.Contents.Add(new Content(streamIndex, DateTime.Now-streamOrigin, pos, chunk.ToByteArray())); pos += chunk.TotalLength; break; case ASFChunk.ChunkType.Unknown: break; } } } catch (EndOfStreamException) { if (chunks==0) throw; } return res; }
public ParsedContent GetContents() { var res = contents; contents = new ParsedContent(); return res; }
public ParsedContent Read(Stream stream) { var res = new ParsedContent(); var bodies = new List<Element>(); var info = new AtomCollection(Channel.ChannelInfo.Extra); var processed = false; var eos = false; while (!eos) { var start_pos = stream.Position; try { var elt = Element.ReadHeader(stream); if (ebml.MaxIDLength <elt.ID.Length || ebml.MaxSizeLength<elt.Size.Length) { throw new BadDataException(); } switch (state) { case ReaderState.EBML: if (elt.ID.BinaryEquals(Elements.EBML)) { elt.ReadBody(stream); ebml = new EBML(elt); state = ReaderState.Segment; } else { throw new BadDataException(); } break; case ReaderState.Segment: if (elt.ID.BinaryEquals(Elements.Segment)) { segment = new Segment(elt); state = ReaderState.EndOfHeader; } else if (elt.ID.BinaryEquals(Elements.EBML)) { stream.Position = elt.Position; state = ReaderState.EBML; continue; } else if (elt.ID.BinaryEquals(Elements.Void) || elt.ID.BinaryEquals(Elements.CRC32)) { elt.ReadBody(stream); } else { throw new BadDataException(); } break; case ReaderState.EndOfHeader: if (elt.ID.BinaryEquals(Elements.Segment)) { stream.Position = elt.Position; state = ReaderState.Segment; continue; } else if (elt.ID.BinaryEquals(Elements.EBML)) { stream.Position = elt.Position; state = ReaderState.EBML; continue; } else if (elt.ID.BinaryEquals(Elements.Cluster)) { stream.Position = elt.Position; state = ReaderState.Cluster; clusters.Clear(); MemoryStream header; using (header=new MemoryStream()) { ebml.Element.Write(header); segment.Element.Write(header); foreach (var c in segment.HeaderElements) { c.Write(header); } } streamIndex = Channel.GenerateStreamID(); streamOrigin = DateTime.Now; res.ContentHeader = new Content(streamIndex, TimeSpan.Zero, 0, header.ToArray()); if (ebml.DocType=="webm") { info.SetChanInfoType("WEBM"); info.SetChanInfoStreamType("video/webm"); info.SetChanInfoStreamExt(".webm"); } else { info.SetChanInfoType("MKV"); info.SetChanInfoStreamType("video/x-matroska"); info.SetChanInfoStreamExt(".mkv"); } res.ChannelInfo = new ChannelInfo(info); } else { elt.ReadBody(stream); segment.AddHeader(elt); } break; case ReaderState.Cluster: if (elt.ID.BinaryEquals(Elements.Segment)) { stream.Position = elt.Position; state = ReaderState.Segment; continue; } else if (elt.ID.BinaryEquals(Elements.EBML)) { stream.Position = elt.Position; state = ReaderState.EBML; continue; } else if (elt.ID.BinaryEquals(Elements.Cluster)) { if (clusters.Count>0) { var timespan = clusters.Sum(c => c.Timespan); if (timespan>=30.0) { var sz = clusters.Sum(c => c.Timespan>0 ? c.BlockSize : 0); var kbps = (int)((sz*8/timespan+900) / 1000.0); info.SetChanInfoBitrate(kbps); res.ChannelInfo = new ChannelInfo(info); while (clusters.Count>1) clusters.RemoveFirst(); } } var cluster = new Cluster(elt); clusters.AddLast(cluster); bodies.Add(elt); state = ReaderState.Timecode; } else if (elt.ID.BinaryEquals(Elements.Void) || elt.ID.BinaryEquals(Elements.CRC32)) { elt.ReadBody(stream); bodies.Add(elt); } else { throw new BadDataException(); } break; case ReaderState.Timecode: if (elt.ID.BinaryEquals(Elements.Segment)) { stream.Position = elt.Position; state = ReaderState.Segment; continue; } else if (elt.ID.BinaryEquals(Elements.EBML)) { stream.Position = elt.Position; state = ReaderState.EBML; continue; } else if (elt.ID.BinaryEquals(Elements.Cluster)) { stream.Position = elt.Position; state = ReaderState.Cluster; continue; } else if (elt.ID.BinaryEquals(Elements.Timecode)) { elt.ReadBody(stream); if (clusters.Last!=null) { clusters.Last.Value.Timecode = Element.ReadUInt(new MemoryStream(elt.Data), elt.Data.Length)*(segment.TimecodeScale/1000000000.0); if (clusters.Count>1) { clusters.Last.Previous.Value.Timespan = clusters.Last.Value.Timecode - clusters.Last.Previous.Value.Timecode; } } bodies.Add(elt); state = ReaderState.Block; } else if (elt.ID.BinaryEquals(Elements.SimpleBlock) || elt.ID.BinaryEquals(Elements.BlockGroup)) { stream.Position = elt.Position; state = ReaderState.Block; continue; } else { elt.ReadBody(stream); bodies.Add(elt); } break; case ReaderState.Block: if (elt.ID.BinaryEquals(Elements.Segment)) { stream.Position = elt.Position; state = ReaderState.Segment; continue; } else if (elt.ID.BinaryEquals(Elements.EBML)) { stream.Position = elt.Position; state = ReaderState.EBML; continue; } else if (elt.ID.BinaryEquals(Elements.Cluster)) { stream.Position = elt.Position; state = ReaderState.Cluster; continue; } else if ((elt.ID.BinaryEquals(Elements.SimpleBlock) || elt.ID.BinaryEquals(Elements.BlockGroup)) && (clusters.Last.Value.BlockID==null || elt.ID.BinaryEquals(clusters.Last.Value.BlockID))) { elt.ReadBody(stream); clusters.Last.Value.BlockSize += elt.Size.Value; clusters.Last.Value.BlockID = elt.ID.Binary; bodies.Add(elt); } else if (clusters.Last.Value.BlockID==null) { elt.ReadBody(stream); bodies.Add(elt); } else { stream.Position = elt.Position; state = ReaderState.Cluster; continue; } break; } processed = true; } catch (EndOfStreamException) { if (!processed) throw; stream.Position = start_pos; eos = true; } catch (BadDataException) { stream.Position = start_pos+1; } } if (res.ContentHeader!=null) { position = res.ContentHeader.Position + res.ContentHeader.Data.Length; } if (bodies.Count>0) { res.Contents = new List<Content>(); foreach (var body in bodies) { MemoryStream s; using (s=new MemoryStream()) { body.Write(s); } var data = s.ToArray(); res.Contents.Add(new Content(streamIndex, DateTime.Now-streamOrigin, position, data)); position += data.Length; } } return res; }
public ParsedContent Read(Stream stream) { var res = new ParsedContent(); var info = new AtomCollection(Channel.ChannelInfo.Extra); var processed = false; var eos = false; while (!eos) { var start_pos = stream.Position; try { switch (state) { case ReaderState.Header: { var bin = ReadBytes(stream, 13); var header = new FileHeader(bin); if (header.IsValid) { Logger.Info("FLV Header found"); fileHeader = header; bin = header.Binary; res.ContentHeader = new Content(position, bin); res.Contents = null; info.SetChanInfoType("FLV"); info.SetChanInfoStreamType("video/x-flv"); info.SetChanInfoStreamExt(".flv"); res.ChannelInfo = new ChannelInfo(info); position = bin.Length; tags.Clear(); state = ReaderState.Body; } else { throw new BadDataException(); } } break; case ReaderState.Body: { var bin = ReadBytes(stream, 11); var read_valid = false; var body = new FLVTag(bin); if (body.IsValidHeader) { body.ReadBody(stream); body.ReadFooter(stream); if (body.IsValidFooter) { read_valid = true; bin = body.Binary; if (res.Contents==null) res.Contents = new List<Content>(); res.Contents.Add(new Content(position, bin)); tags.AddLast(new TagDesc { Timestamp=body.Timestamp/1000.0, DataSize=body.DataSize }); var timespan = tags.Last.Value.Timestamp-tags.First.Value.Timestamp; if (timespan>=30.0) { var sz = tags.Take(tags.Count-1).Sum(t => t.DataSize); info.SetChanInfoBitrate((int)(sz*8/timespan+900)/1000); res.ChannelInfo = new ChannelInfo(info); while (tags.Count>1) tags.RemoveFirst(); } position += bin.Length; } } if (!read_valid) { stream.Position = start_pos; var header = new FileHeader(ReadBytes(stream, 13)); if (header.IsValid) { Logger.Info("New FLV Header found"); read_valid = true; fileHeader = header; bin = header.Binary; res.ContentHeader = new Content(0, bin); res.Contents = null; info.SetChanInfoType("FLV"); info.SetChanInfoStreamType("video/x-flv"); info.SetChanInfoStreamExt(".flv"); res.ChannelInfo = new ChannelInfo(info); tags.Clear(); position = bin.Length; } } if (!read_valid) throw new BadDataException(); } break; } processed = true; } catch (EndOfStreamException) { if (!processed) throw; stream.Position = start_pos; eos = true; } catch (BadDataException) { stream.Position = start_pos+1; } } return res; }