public bool AddData(ByteBuffer data) {
if (data.Limit == 0)
return false;// Empty buffer
if (!CanHandleData(data))
return false;
data.Get();
UpdateSize(data);
int idx = 0;
int pos = 0;
byte[] tmpData = new byte[_blockDataSize];
int countBlocks = _blockCount;
while (data.Remaining > 0 && countBlocks > 0) {
short size = data.GetShort();
countBlocks--;
if (size == 0) {
// Block has not been modified
idx += 1;
pos += _blockDataSize;
continue;
}
// Store new block data
_blockSize[idx] = size;
data.Read(tmpData, 0, size);
Array.Copy(tmpData, 0, _blockData, pos, size);
idx += 1;
pos += _blockDataSize;
}
data.Rewind();
return true;
}
/// <summary>
/// Update total block size.
/// </summary>
/// <param name="data"></param>
private void UpdateSize(ByteBuffer data) {
_widthInfo = data.GetShort();
_heightInfo = data.GetShort();
// extract width and height of the frame
_width = _widthInfo & 0xfff;
_height = _heightInfo & 0xfff;
// calculate size of blocks
_blockWidth = _widthInfo & 0xf000;
_blockWidth = (_blockWidth >> 12) + 1;
_blockWidth <<= 4;
_blockHeight = _heightInfo & 0xf000;
_blockHeight = (_blockHeight >> 12) + 1;
_blockHeight <<= 4;
int xblocks = _width / _blockWidth;
if ((_width % _blockWidth) != 0) {
// partial block
xblocks += 1;
}
int yblocks = _height / _blockHeight;
if ((_height % _blockHeight) != 0) {
// partial block
yblocks += 1;
}
_blockCount = xblocks * yblocks;
int blockSize = GetMaxCompressedSize(_blockWidth * _blockHeight * 3);
int totalBlockSize = blockSize * _blockCount;
if (_totalBlockDataSize != totalBlockSize) {
//log.Debug("Allocating memory for {} compressed blocks.", this.blockCount);
_blockDataSize = blockSize;
_totalBlockDataSize = totalBlockSize;
_blockData = new byte[blockSize * _blockCount];
_blockSize = new int[blockSize * _blockCount];
// Reset the sizes to zero
for (int idx = 0; idx < _blockCount; idx++) {
_blockSize[idx] = 0;
}
}
}
static Ping DecodePing(ByteBuffer stream) {
Ping ping = new Ping();
ping.PingType = stream.GetShort();
ping.Value2 = stream.GetInt();
if (stream.HasRemaining)
ping.Value3 = stream.GetInt();
if (stream.HasRemaining)
ping.Value4 = stream.GetInt();
return ping;
}