literal_cost.h

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/* 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 <brotli/types.h>
 
#include "../common/platform.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, size_t* histogram,
    float* cost);
 
#if defined(__cplusplus) || defined(c_plusplus)
}  /* extern "C" */
#endif
 
#endif  /* BROTLI_ENC_LITERAL_COST_H_ */