mirror of
https://github.com/opencv/opencv.git
synced 2024-12-26 02:28:04 +08:00
0de26fd78e
Zlib-ng is zlib replacement with optimizations for "next generation" systems. Its optimization may benifits image library decode and encode speed such as libpng. In our tests, if using zlib-ng and libpng combination on a x86_64 machine with AVX2, the time of `imdecode` amd `imencode` will drop 20% approximately. This patch enables zlib-ng's optimization if `CV_DISABLE_OPTIMIZATION` is OFF. Since Zlib-ng can dispatch intrinsics on the fly, port work is much easier. Related discussion: https://github.com/opencv/opencv/issues/22573
22 lines
593 B
C
22 lines
593 B
C
/* insert_string.c -- insert_string integer hash variant
|
|
*
|
|
* Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*
|
|
*/
|
|
|
|
#include "zbuild.h"
|
|
#include "deflate.h"
|
|
|
|
#define HASH_SLIDE 16
|
|
|
|
#define HASH_CALC(s, h, val) h = ((val * 2654435761U) >> HASH_SLIDE);
|
|
#define HASH_CALC_VAR h
|
|
#define HASH_CALC_VAR_INIT uint32_t h = 0
|
|
|
|
#define UPDATE_HASH update_hash_c
|
|
#define INSERT_STRING insert_string_c
|
|
#define QUICK_INSERT_STRING quick_insert_string_c
|
|
|
|
#include "insert_string_tpl.h"
|