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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
43 lines
1.9 KiB
C
43 lines
1.9 KiB
C
/* functable.h -- Struct containing function pointers to optimized functions
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* Copyright (C) 2017 Hans Kristian Rosbach
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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#ifndef FUNCTABLE_H_
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#define FUNCTABLE_H_
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#include "deflate.h"
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#include "crc32_fold.h"
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#include "adler32_fold.h"
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#ifdef ZLIB_COMPAT
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typedef struct z_stream_s z_stream;
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#else
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typedef struct zng_stream_s zng_stream;
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#endif
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struct functable_s {
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void (* force_init) (void);
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uint32_t (* adler32) (uint32_t adler, const uint8_t *buf, size_t len);
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uint32_t (* adler32_fold_copy) (uint32_t adler, uint8_t *dst, const uint8_t *src, size_t len);
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uint8_t* (* chunkmemset_safe) (uint8_t *out, unsigned dist, unsigned len, unsigned left);
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uint32_t (* chunksize) (void);
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uint32_t (* compare256) (const uint8_t *src0, const uint8_t *src1);
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uint32_t (* crc32) (uint32_t crc, const uint8_t *buf, size_t len);
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void (* crc32_fold) (struct crc32_fold_s *crc, const uint8_t *src, size_t len, uint32_t init_crc);
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void (* crc32_fold_copy) (struct crc32_fold_s *crc, uint8_t *dst, const uint8_t *src, size_t len);
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uint32_t (* crc32_fold_final) (struct crc32_fold_s *crc);
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uint32_t (* crc32_fold_reset) (struct crc32_fold_s *crc);
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void (* inflate_fast) (PREFIX3(stream) *strm, uint32_t start);
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void (* insert_string) (deflate_state *const s, uint32_t str, uint32_t count);
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uint32_t (* longest_match) (deflate_state *const s, Pos cur_match);
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uint32_t (* longest_match_slow) (deflate_state *const s, Pos cur_match);
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Pos (* quick_insert_string)(deflate_state *const s, uint32_t str);
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void (* slide_hash) (deflate_state *s);
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uint32_t (* update_hash) (deflate_state *const s, uint32_t h, uint32_t val);
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};
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Z_INTERNAL extern struct functable_s functable;
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#endif
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