rle2Decode

ubyte[] rle2Decode(const(ushort)[]  symbols,  int  nInUse,
       size_t maxOutput =  size_t.max)

@trusted

Decode RLE2 to MTF indices.

Uses Appender with .put() for efficient amortized O(1) appends, avoiding repeated GC allocations from `~=` usage in tight loops.

`symbols`	RLE2 encoded symbols.
`nInUse`	Number of unique MTF symbols.

MTF indices.