/// <summary> /// Constructs a <see cref="Track" /> parsing from provided /// file data. /// Parsing will be done reading from _file at position references by /// parent element's data section. /// </summary> /// <param name="_file"><see cref="File" /> instance to read from.</param> /// <param name="element">Parent <see cref="EBMLreader" />.</param> public Track(File _file, EBMLreader element) { ulong i = 0; while (i < element.DataSize) { var child = new EBMLreader(_file, element.DataOffset + i); switch (child.ID) { case MatroskaID.TrackNumber: track_number = child.ReadULong(); break; case MatroskaID.TrackUID: _UID = child.ReadULong(); break; case MatroskaID.CodecID: track_codec_id = child.ReadString(); break; case MatroskaID.CodecName: track_codec_name = child.ReadString(); break; case MatroskaID.TrackName: track_name = child.ReadString(); break; case MatroskaID.TrackLanguage: track_language = child.ReadString(); break; case MatroskaID.TrackFlagEnabled: track_enabled = child.ReadBool(); break; case MatroskaID.TrackFlagDefault: track_default = child.ReadBool(); break; case MatroskaID.CodecPrivate: codec_data = child.ReadBytes(); break; default: UnknownElements.Add(child); break; } i += child.Size; } }
/// <summary> /// Construct a <see cref="AudioTrack" /> reading information from /// provided file data. /// Parsing will be done reading from _file at position references by /// parent element's data section. /// </summary> /// <param name="_file"><see cref="File" /> instance to read from.</param> /// <param name="element">Parent <see cref="EBMLreader" />.</param> public AudioTrack(File _file, EBMLreader element) : base(_file, element) { MatroskaID matroska_id; // Here we handle the unknown elements we know, and store the rest foreach (var elem in base.UnknownElements) { matroska_id = elem.ID; switch (matroska_id) { case MatroskaID.TrackAudio: { ulong i = 0; while (i < elem.DataSize) { var child = new EBMLreader(_file, elem.DataOffset + i); matroska_id = child.ID; switch (matroska_id) { case MatroskaID.AudioChannels: channels = child.ReadULong(); break; case MatroskaID.AudioBitDepth: depth = child.ReadULong(); break; case MatroskaID.AudioSamplingFreq: rate = child.ReadDouble(); break; default: UnknownElements.Add(child); break; } i += child.Size; } break; } default: UnknownElements.Add(elem); break; } } }
private void ReadCreateSegmentInfo(EBMLreader element, EBMLelement ebml_sinfo) { ulong i = 0; while (i < element.DataSize) { var child = new EBMLreader(element, element.DataOffset + i); switch (child.ID) { case MatroskaID.Duration: duration_unscaled = child.ReadDouble(); if (time_scale > 0) { duration = TimeSpan.FromMilliseconds(duration_unscaled * time_scale / 1000000); } break; case MatroskaID.TimeCodeScale: time_scale = child.ReadULong(); if (duration_unscaled > 0) { duration = TimeSpan.FromMilliseconds(duration_unscaled * time_scale / 1000000); } break; case MatroskaID.Title: break; } i += child.Size; } }
private void ReadTrackEntry(EBMLreader element) { ulong i = 0; while (i < element.DataSize) { var child = new EBMLreader(element, element.DataOffset + i); switch (child.ID) { case MatroskaID.TrackType: { switch ((TrackType)child.ReadULong()) { case TrackType.Video: { var track = new VideoTrack(this, element); tracks.Add(track); break; } case TrackType.Audio: { var track = new AudioTrack(this, element); tracks.Add(track); break; } } break; } } i += child.Size; } }
private void ReadAttachedFile(EBMLreader element, ReadStyle propertiesStyle) { ulong i = 0; #pragma warning restore 219 while (i < element.DataSize) { var child = new EBMLreader(element, element.DataOffset + i); switch (child.ID) { case MatroskaID.FileName: #pragma warning disable 219 // Assigned, never read _ = child.ReadString(); break; case MatroskaID.FileMimeType: _ = child.ReadString(); break; case MatroskaID.FileDescription: _ = child.ReadString(); break; case MatroskaID.FileData: break; case MatroskaID.FileUID: _ = child.ReadULong(); break; } i += child.Size; } }
/// <summary> /// Constructs a <see cref="VideoTrack" /> parsing from provided /// file data. /// Parsing will be done reading from _file at position references by /// parent element's data section. /// </summary> /// <param name="_file"><see cref="File" /> instance to read from.</param> /// <param name="element">Parent <see cref="EBMLreader" />.</param> public VideoTrack(File _file, EBMLreader element) : base(_file, element) { MatroskaID matroska_id; // Here we handle the unknown elements we know, and store the rest foreach (var elem in base.UnknownElements) { matroska_id = elem.ID; switch (matroska_id) { case MatroskaID.TrackVideo: { ulong i = 0; while (i < elem.DataSize) { var child = new EBMLreader(_file, elem.DataOffset + i); matroska_id = child.ID; switch (matroska_id) { case MatroskaID.VideoDisplayWidth: disp_width = child.ReadULong(); break; case MatroskaID.VideoDisplayHeight: disp_height = child.ReadULong(); break; case MatroskaID.VideoPixelWidth: width = child.ReadULong(); break; case MatroskaID.VideoPixelHeight: height = child.ReadULong(); break; case MatroskaID.VideoFrameRate: framerate = child.ReadDouble(); break; case MatroskaID.VideoFlagInterlaced: interlaced = child.ReadBool(); break; case MatroskaID.VideoAspectRatioType: ratio_type = (VideoAspectRatioType)child.ReadULong(); break; case MatroskaID.VideoColourSpace: fourcc = child.ReadBytes(); break; default: UnknownElements.Add(child); break; } i += child.Size; } break; } case MatroskaID.TrackDefaultDuration: var tmp = elem.ReadULong(); framerate = 1000000000.0 / tmp; break; default: UnknownElements.Add(elem); break; } } }
private bool ReadSeekHead(EBMLreader element, List <EBMLreader> segm_list) { MatroskaID ebml_id = 0; ulong ebml_position = 0; ulong i = 0; while (i < element.DataSize) { var ebml_seek = new EBMLreader(element, element.DataOffset + i); var matroska_id = ebml_seek.ID; if (matroska_id != MatroskaID.Seek) { return(false); // corrupted SeekHead } ulong j = 0; while (j < ebml_seek.DataSize) { var child = new EBMLreader(ebml_seek, ebml_seek.DataOffset + j); matroska_id = child.ID; switch (matroska_id) { case MatroskaID.SeekID: ebml_id = (MatroskaID)child.ReadULong(); break; case MatroskaID.SeekPosition: ebml_position = child.ReadULong() + element.Offset; break; } j += child.Size; } if (ebml_id > 0 && ebml_position > 0) { // Create abstract EBML representation of the segment EBML var ebml = new EBMLreader(element.Parent, ebml_position, ebml_id); // Sort the seek-entries by increasing position order int k; for (k = segm_list.Count - 1; k >= 0; k--) { if (ebml_position > segm_list[k] .Offset) { break; } } segm_list.Insert(k + 1, ebml); // Chained SeekHead recursive read if (ebml_id == MatroskaID.SeekHead) { if (!ebml.Read()) { return(false); // Corrupted } ReadSeekHead(ebml, segm_list); } } i += ebml_seek.Size; } return(true); }