fix compression

include/sp/extensions/Compress.h

@@ -16,14 +16,7 @@ namespace zlib {
  * \param buffer the data to compress
  * \return the compressed data
  */
-DataBuffer Compress(const DataBuffer& buffer);
-
-/**
- * \brief Reads the packet lenght and uncompress it
- * \param buffer the data to uncompress
- * \return the uncompressed data
- */
-DataBuffer Decompress(DataBuffer& buffer);
+DataBuffer Compress(const DataBuffer& buffer, std::size_t a_CompressionThreshold = 64);
 
 /**
  * \brief Uncompress some data