private bool AddPage(ContainerReader.PageHeader hdr)
{
PacketReader packetReader;
if (!this._packetReaders.TryGetValue(hdr.StreamSerial, out packetReader))
{
packetReader = new PacketReader(this, hdr.StreamSerial);
}
bool flag1 = false;
bool flag2 = (hdr.Flags & PageFlags.ContinuesPacket) == PageFlags.ContinuesPacket;
bool flag3 = (hdr.Flags & PageFlags.EndOfStream) == PageFlags.EndOfStream;
bool flag4 = hdr.IsResync;
int offset = 0;
int length1 = hdr.PacketSizes.Length;
foreach (int length2 in hdr.PacketSizes)
{
Packet packet1 = new Packet(this._stream, hdr.DataOffset + (long)offset, length2);
packet1.PageGranulePosition = hdr.GranulePosition;
packet1.IsEndOfStream = flag3;
packet1.PageSequenceNumber = hdr.SequenceNumber;
packet1.IsContinued = flag1;
packet1.IsContinuation = flag2;
packet1.IsResync = flag4;
Packet packet2 = packet1;
packet2.SetBuffer(hdr.SavedBuffer, offset);
packetReader.AddPacket((DataPacket)packet2);
offset += length2;
flag2 = false;
flag4 = false;
if (--length1 == 1)
{
flag1 = hdr.LastPacketContinues;
}
}
if (!this._packetReaders.ContainsKey(hdr.StreamSerial))
{
int streamSerial = hdr.StreamSerial;
this._packetReaders.Add(streamSerial, packetReader);
this._eosFlags.Add(streamSerial, flag3);
this._streamSerials.Add(streamSerial);
return(true);
}
else
{
Dictionary <int, bool> dictionary;
int streamSerial;
(dictionary = this._eosFlags)[streamSerial = hdr.StreamSerial] = dictionary[streamSerial] | flag3;
return(false);
}
}
private int GatherNextPage(string noPageErrorMessage)
{
ContainerReader.PageHeader nextPageHeader = this.FindNextPageHeader();
if (nextPageHeader == null)
{
throw new InvalidDataException(noPageErrorMessage);
}
if (this.AddPage(nextPageHeader))
{
Action <int> action = this._newStreamCallback;
if (action != null)
{
action(nextPageHeader.StreamSerial);
}
}
return(nextPageHeader.StreamSerial);
}
private ContainerReader.PageHeader ReadPageHeader(long position)
{
this._stream.Position = position;
byte[] buffer = new byte[27];
if (this._stream.Read(buffer, 0, buffer.Length) != buffer.Length)
return (ContainerReader.PageHeader) null;
if ((int) buffer[0] != 79 || (int) buffer[1] != 103 || ((int) buffer[2] != 103 || (int) buffer[3] != 83))
return (ContainerReader.PageHeader) null;
if ((int) buffer[4] != 0)
return (ContainerReader.PageHeader) null;
ContainerReader.PageHeader pageHeader = new ContainerReader.PageHeader();
pageHeader.Flags = (PageFlags) buffer[5];
pageHeader.GranulePosition = BitConverter.ToInt64(buffer, 6);
pageHeader.StreamSerial = BitConverter.ToInt32(buffer, 14);
pageHeader.SequenceNumber = BitConverter.ToInt32(buffer, 18);
uint num = BitConverter.ToUInt32(buffer, 22);
uint crc = 0U;
for (int index = 0; index < 22; ++index)
this.UpdateCRC((int) buffer[index], ref crc);
this.UpdateCRC(0, ref crc);
this.UpdateCRC(0, ref crc);
this.UpdateCRC(0, ref crc);
this.UpdateCRC(0, ref crc);
this.UpdateCRC((int) buffer[26], ref crc);
int length1 = (int) buffer[26];
int[] numArray1 = new int[length1];
int count = 0;
int length2 = 0;
for (int index = 0; index < length1; ++index)
{
int nextVal = this._stream.ReadByte();
this.UpdateCRC(nextVal, ref crc);
numArray1[length2] += nextVal;
if (nextVal < (int) byte.MaxValue)
{
++length2;
pageHeader.LastPacketContinues = false;
}
else
pageHeader.LastPacketContinues = true;
count += nextVal;
}
if (pageHeader.LastPacketContinues)
++length2;
if (length2 < numArray1.Length)
{
int[] numArray2 = new int[length2];
for (int index = 0; index < length2; ++index)
numArray2[index] = numArray1[index];
numArray1 = numArray2;
}
pageHeader.PacketSizes = numArray1;
pageHeader.DataOffset = position + 27L + (long) length1;
pageHeader.SavedBuffer = new byte[count];
if (this._stream.Read(pageHeader.SavedBuffer, 0, count) != count)
return (ContainerReader.PageHeader) null;
int index1 = -1;
while (++index1 < count)
this.UpdateCRC((int) pageHeader.SavedBuffer[index1], ref crc);
if ((int) crc != (int) num)
return (ContainerReader.PageHeader) null;
this._containerBits += (long) (8 * (27 + length1));
++this._pageCount;
return pageHeader;
}
private ContainerReader.PageHeader ReadPageHeader(long position)
{
this._stream.Position = position;
byte[] buffer = new byte[27];
if (this._stream.Read(buffer, 0, buffer.Length) != buffer.Length)
{
return((ContainerReader.PageHeader)null);
}
if ((int)buffer[0] != 79 || (int)buffer[1] != 103 || ((int)buffer[2] != 103 || (int)buffer[3] != 83))
{
return((ContainerReader.PageHeader)null);
}
if ((int)buffer[4] != 0)
{
return((ContainerReader.PageHeader)null);
}
ContainerReader.PageHeader pageHeader = new ContainerReader.PageHeader();
pageHeader.Flags = (PageFlags)buffer[5];
pageHeader.GranulePosition = BitConverter.ToInt64(buffer, 6);
pageHeader.StreamSerial = BitConverter.ToInt32(buffer, 14);
pageHeader.SequenceNumber = BitConverter.ToInt32(buffer, 18);
uint num = BitConverter.ToUInt32(buffer, 22);
uint crc = 0U;
for (int index = 0; index < 22; ++index)
{
this.UpdateCRC((int)buffer[index], ref crc);
}
this.UpdateCRC(0, ref crc);
this.UpdateCRC(0, ref crc);
this.UpdateCRC(0, ref crc);
this.UpdateCRC(0, ref crc);
this.UpdateCRC((int)buffer[26], ref crc);
int length1 = (int)buffer[26];
int[] numArray1 = new int[length1];
int count = 0;
int length2 = 0;
for (int index = 0; index < length1; ++index)
{
int nextVal = this._stream.ReadByte();
this.UpdateCRC(nextVal, ref crc);
numArray1[length2] += nextVal;
if (nextVal < (int)byte.MaxValue)
{
++length2;
pageHeader.LastPacketContinues = false;
}
else
{
pageHeader.LastPacketContinues = true;
}
count += nextVal;
}
if (pageHeader.LastPacketContinues)
{
++length2;
}
if (length2 < numArray1.Length)
{
int[] numArray2 = new int[length2];
for (int index = 0; index < length2; ++index)
{
numArray2[index] = numArray1[index];
}
numArray1 = numArray2;
}
pageHeader.PacketSizes = numArray1;
pageHeader.DataOffset = position + 27L + (long)length1;
pageHeader.SavedBuffer = new byte[count];
if (this._stream.Read(pageHeader.SavedBuffer, 0, count) != count)
{
return((ContainerReader.PageHeader)null);
}
int index1 = -1;
while (++index1 < count)
{
this.UpdateCRC((int)pageHeader.SavedBuffer[index1], ref crc);
}
if ((int)crc != (int)num)
{
return((ContainerReader.PageHeader)null);
}
this._containerBits += (long)(8 * (27 + length1));
++this._pageCount;
return(pageHeader);
}
