eden-emu/opus
18
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Multiplier-free entropy coder

Browse source
This commit is contained in:
Timothy B. Terriberry 2007-12-06 15:09:53 +11:00 • committed by Jean-Marc Valin
parent aeb4467d7f
commit 2ec8d9e522
26 changed files with 1597 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

23
libentcode/probenc.h Normal file
View file

@ -0,0 +1,23 @@
#if !defined(_probenc_H)
# define _probenc_H (1)
# include "probmod.h"
# include "entenc.h"
/*Encodes a single symbol using the given probability model and entropy
encoder.
_sym: The symbol to encode.*/
void ec_probmod_write(ec_probmod *_this,ec_enc *_enc,int _sym);
/*Encodes a single symbol using the given probability model and entropy
encoder, restricted to a given subrange of the available symbols.
This effectively sets the frequency counts of all the symbols outside this
range to zero, encodes the symbol, then restores the counts to their
original values, and updates the models.
_sym: The symbol to encode.
The caller must ensure this falls in the range _lo<=_sym<_hi.
_lo: The first legal symbol to encode.
_hi: One greater than the last legal symbol to encode.
This must be greater than _lo.*/
void ec_probmod_write_range(ec_probmod *_this,ec_enc *_enc,int _sym,
int _lo,int _hi);
#endif