private unsafe bool AddPage(PageHeader hdr)
{
// get our packet reader (create one if we have to)
if (!_packetReaders.TryGetValue(hdr.StreamSerial, out var packetReader))
{
packetReader = new OggPacketReader(this, hdr.StreamSerial);
}
// save off the container bits
packetReader.ContainerBits += _containerBits;
_containerBits = 0;
// get our flags prepped
bool isContinued = hdr.SegCount == 1 && hdr.LastPacketContinues;
bool isContinuation = (hdr.Flags & OggPageFlags.ContinuesPacket) == OggPageFlags.ContinuesPacket;
bool isEOS = false;
bool isResync = hdr.IsResync;
// add all the packets, making sure to update flags as needed
long dataOffset = hdr.DataOffset;
int count = hdr.SegCount;
for (int i = 0; i < hdr.SegCount; i++)
{
int size = hdr.PacketSizes[i];
var packet = OggPacketPool.Rent(this, dataOffset, size);
packet.PageGranulePosition = hdr.GranulePosition;
packet.IsEndOfStream = isEOS;
packet.PageSequenceNumber = hdr.SequenceNumber;
packet.IsContinued = isContinued;
packet.IsContinuation = isContinuation;
packet.IsResync = isResync;
packetReader.AddPacket(packet);
// update the offset into the stream for each packet
dataOffset += size;
// only the first packet in a page can be a continuation or resync
isContinuation = false;
isResync = false;
// only the last packet in a page can be continued or flagged end of stream
if (--count == 1)
{
isContinued = hdr.LastPacketContinues;
isEOS = (hdr.Flags & OggPageFlags.EndOfStream) == OggPageFlags.EndOfStream;
}
}
// if the packet reader list doesn't include the serial in question, add it to the list and indicate a new stream to the caller
if (!_packetReaders.ContainsKey(hdr.StreamSerial))
{
_packetReaders.Add(hdr.StreamSerial, packetReader);
return(true);
}
else
{
// otherwise, indicate an existing stream to the caller
return(false);
}
}
// packet reader bits...
internal void DisposePacketReader(OggPacketReader packetReader)
{
_disposedStreamSerials.Add(packetReader.StreamSerial);
_packetReaders.Remove(packetReader.StreamSerial);
}
public DebugView(OggPacketReader reader)
{
_reader = reader ?? throw new ArgumentNullException();
}