/// <summary>
/// Closes the current block file stream.
/// </summary>
/// <remarks>
/// The reciever can still be used.
/// Any new chuncks will start building a new file.
/// </remarks>
public void Close()
{
mClient.RaiseFrameReceivedEvent -= FrameReceivedEventHandler;
mMemStream.Close();
mMemStream = null;
mCRC = 0;
mCRCOk = false;
mFlags = 0;
mLastIndexWritten = 0;
}
protected virtual void ProcessChunk1(byte[] data)
{
// collect the CRC
if (data.Length > 1)
{
ushort crc = 0;
// MSB CRC
crc = data[1];
crc <<= 8;
// LSB CRC
crc |= data[0];
if (crc != mCRC)
{
mCRC = crc;
// may need a new block file
if (mCRCOk)
{
CreateMemoryStream();
}
mCRCOk = false;
}
}
// try the flags field
if (data.Length > 2)
{
mFlags = (CANLib.BlockFlags)data[2];
}
// have we got the version
if (data.Length > 7 && (mFlags & CANLib.BlockFlags.VersionPresent) != 0)
{
mBlockVersion = data[7];
}
// have we got the size yet
if (data.Length > 6)
{
if (!BitConverter.IsLittleEndian)
{
Array.Reverse(data, 3, 4);
}
uint size = BitConverter.ToUInt32(data, 3);
if (size != mSize)
{
mSize = size;
// deal with null blocks
if (size == 0)
{
mLastIndexWritten = 0;
mCRCOk = true;
BlockCompleted();
}
else
{
// may need a new block file
if (mCRCOk)
{
CreateMemoryStream(size);
}
mCRCOk = false;
}
}
}
}
