/// <summary>
/// Read the cues from the root cue node.
/// </summary>
public static Cue[] GetCues(MatroskaSegment segment, Stream reader)
{
MatroskaTree cues = segment.GetChildFromSeek(reader, MatroskaTree.Segment_Cues);
if (cues == null)
{
return(new Cue[0]);
}
segment.Position(reader);
long offset = reader.Position;
MatroskaTree[] sources = cues.GetChildren(reader, MatroskaTree.Segment_Cues_CuePoint);
Cue[] results = new Cue[sources.Length];
for (int i = 0; i < sources.Length; ++i)
{
long time = sources[i].GetChildValue(reader, MatroskaTree.Segment_Cues_CuePoint_CueTime);
MatroskaTree position = sources[i].GetChild(reader, MatroskaTree.Segment_Cues_CuePoint_CueTrackPositions);
results[i] = new Cue(
time, position.GetChildValue(reader, MatroskaTree.Segment_Cues_CuePoint_CueTrackPositions_CueTrack),
offset +
position.GetChildValue(reader, MatroskaTree.Segment_Cues_CuePoint_CueTrackPositions_CueClusterPosition)
);
}
return(results);
}
/// <summary>
/// Reads the segment with its seek header.
/// </summary>
public MatroskaSegment(Stream reader) : base(reader)
{
MatroskaTree seekHead = GetChild(reader, Segment_SeekHead);
if (seekHead == null)
{
reader.Position = end;
return;
}
MatroskaTree[] seekInputs = seekHead.GetChildren(reader, Segment_SeekHead_Seek);
for (int i = 0; i < seekInputs.Length; ++i)
{
seeks[(int)seekInputs[i].GetChildValue(reader, Segment_SeekHead_Seek_SeekID)] =
seekInputs[i].GetChildValue(reader, Segment_SeekHead_Seek_SeekPosition);
}
reader.Position = end;
}
/// <summary>
/// All blocks of the cluster, in order.
/// </summary>
public IReadOnlyList <Block> GetBlocks(Stream reader)
{
if (blocks != null)
{
return(blocks);
}
MemoryStream stream = new MemoryStream(source.GetRawData(reader));
blocks = new List <Block>();
long end = stream.Length - 2; // Safety barrier, a byte might remain, but a 2 byte child is impossible
while (stream.Position < end)
{
MatroskaTree child = new MatroskaTree(stream);
long continueFrom = stream.Position;
// Block groups (Matroska v1)
if (child.Tag == MatroskaTree.Segment_Cluster_BlockGroup)
{
MatroskaTree[] blocksHere = child.GetChildren(stream, MatroskaTree.Segment_Cluster_BlockGroup_Block);
for (int i = 0; i < blocksHere.Length; ++i)
{
blocks.Add(new Block(stream, blocksHere[i]));
}
}
// Simple blocks (Matroska v2)
else if (child.Tag == MatroskaTree.Segment_Cluster_SimpleBlock)
{
blocks.Add(new Block(stream, child));
}
stream.Position = continueFrom;
}
return(blocks);
}