aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/brotli/enc/literal_cost.h
blob: 8f53f39d3f2e8edb944f80c2b1cb841564efe498 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
/* Copyright 2013 Google Inc. All Rights Reserved.

   Distributed under MIT license.
   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/

/* Literal cost model to allow backward reference replacement to be efficient.
*/

#ifndef BROTLI_ENC_LITERAL_COST_H_
#define BROTLI_ENC_LITERAL_COST_H_

#include "../common/platform.h"
#include <brotli/types.h>

#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif

/* Estimates how many bits the literals in the interval [pos, pos + len) in the
   ring-buffer (data, mask) will take entropy coded and writes these estimates
   to the cost[0..len) array. */
BROTLI_INTERNAL void BrotliEstimateBitCostsForLiterals(
    size_t pos, size_t len, size_t mask, const uint8_t* data, float* cost);

#if defined(__cplusplus) || defined(c_plusplus)
}  /* extern "C" */
#endif

#endif  /* BROTLI_ENC_LITERAL_COST_H_ */