SV8 specification draft

File header

Field	length (bits)	Value
Magic	24	"MP+"
Version	8	0x08

This file header allow old mpc readers to stop decoding at this point, without crashing.

Block formating

All blocks are formated using Key / Length / Value. Key is 16 bits long. It's the block type. Length is a variable size field using the same values as ​matroska : bits, big-endian 1xxx xxxx - value 0 to 2^{7-2 01xx xxxx xxxx xxxx - value 0 to 2}14-2 001x xxxx xxxx xxxx xxxx xxxx - value 0 to 2^{21-2 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2}28-2 ... The length is the size of the block in bytes, including the key and size fields. So the minimum length of a block is 3. The value is the block content. Its size can be 0.

Field	length (bits)	Value
Key	16	"EX"
Length	n * 8, 0 < n < inf	0x1A
Value	Lentgh * 8	"exemple"