protected virtual void SendC2(BinaryWriter bw)
{
bw.Write(C2); // C2 (copy of S1)
}
protected virtual void SendC0(BinaryWriter bw)
{
bw.Write(C0); // C0 = Version of protocol
}
private void SendTimestamp(BinaryWriter bw)
{
extendedTimeStamp = Timestamp >= 0xFFFFFF; // extended timestamp, 4 bytes
byte[] bytes = new byte[3];
if (!extendedTimeStamp)
{
bytes[0] = (byte)(Timestamp >> 16);
bytes[1] = (byte)(Timestamp >> 8);
bytes[2] = (byte)Timestamp;
}
else
{ //send 0xFFFFFF
bytes[0] = 0xFF;
bytes[1] = 0xFF;
bytes[2] = 0xFF;
}
bw.Write(bytes);
}
protected virtual void SendC1(BinaryWriter bw)
{
bw.Write(C1); // C1 is some random garbage (usually)
bw.Flush();
}
private void SendMessageTypeID(BinaryWriter bw)
{
bw.Write((byte)MessageTypeID);
}
private void SendMessageStreamID(BinaryWriter bw)
{
bw.OutputEndianness = Endianness.LittleEndian;
bw.Write(MessageStreamID);
bw.OutputEndianness = Endianness.BigEndian;
}
private void SendMessageLength(BinaryWriter bw)
{
byte[] bytes = new byte[3];
int msgLen = MessageLength;
bytes[0] = (byte)(msgLen >> 16);
bytes[1] = (byte)(msgLen >> 8);
bytes[2] = (byte)msgLen;
bw.Write(bytes);
}
private void SendFormatAndChunkStreamID(BinaryWriter bw)
{
byte fmt = (byte)((int)Format << 6);
int chunkStreamId = (int)ChunkStreamID;
if (chunkStreamId > 1 && chunkStreamId < 64)
{
//just put the cs_id over it
fmt |= (byte)chunkStreamId;
bw.Write(fmt);
}
else if (chunkStreamId > 63 && chunkStreamId < 320)
{
//1 byte extension, the cs_id is 0, fmt stays as it is
byte cs_id = (byte)(chunkStreamId - 64);
bw.Write(fmt);
bw.Write(cs_id);
}
else if (chunkStreamId > 319 && chunkStreamId < 65600)
{
//2 byte extension, the cs_id is 1
fmt |= (byte)1;
/*id = ((the thirdbyte)*256 + the second byte + 64
*id -64 = third*256 + second
*/
int cs_id = chunkStreamId - 64;
byte cs_id2 = (byte)(cs_id & 0xFF);
byte cs_id3 = (byte)(cs_id / 256);
bw.Write(fmt);
bw.Write(cs_id2);
bw.Write(cs_id3);
}
else
{
throw new NotSupportedException("only chunk stream ids from 2 to 65599 are supported (0 and 1 are reserved[and are calculated automatically], while 2 is a special stream for 'low level messages')");
}
}
private void SendExtendedTimestamp(BinaryWriter bw)
{
if (extendedTimeStamp)
{
byte[] bytes = new byte[4];
bytes[0] = (byte)(Timestamp >> 24);
bytes[1] = (byte)(Timestamp >> 16);
bytes[2] = (byte)(Timestamp >> 8);
bytes[3] = (byte)Timestamp;
bw.Write(bytes);
}
}