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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
149 lines
4.3 KiB
C
149 lines
4.3 KiB
C
#ifndef ZUTIL_H_
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#define ZUTIL_H_
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/* zutil.h -- internal interface and configuration of the compression library
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* Copyright (C) 1995-2022 Jean-loup Gailly, Mark Adler
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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/* WARNING: this file should *not* be used by applications. It is
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part of the implementation of the compression library and is
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subject to change. Applications should only use zlib.h.
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*/
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#include "zbuild.h"
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#ifdef ZLIB_COMPAT
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# include "zlib.h"
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#else
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# include "zlib-ng.h"
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#endif
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typedef unsigned char uch; /* Included for compatibility with external code only */
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typedef uint16_t ush; /* Included for compatibility with external code only */
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typedef unsigned long ulg;
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extern z_const char * const PREFIX(z_errmsg)[10]; /* indexed by 2-zlib_error */
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/* (size given to avoid silly warnings with Visual C++) */
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#define ERR_MSG(err) PREFIX(z_errmsg)[Z_NEED_DICT-(err)]
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#define ERR_RETURN(strm, err) return (strm->msg = ERR_MSG(err), (err))
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/* To be used only when the state is known to be valid */
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/* common constants */
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#ifndef DEF_WBITS
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# define DEF_WBITS MAX_WBITS
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#endif
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/* default windowBits for decompression. MAX_WBITS is for compression only */
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#define MAX_BITS 15
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/* all codes must not exceed MAX_BITS bits */
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#define MAX_DIST_EXTRA_BITS 13
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/* maximum number of extra distance bits */
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#if MAX_MEM_LEVEL >= 8
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# define DEF_MEM_LEVEL 8
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#else
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# define DEF_MEM_LEVEL MAX_MEM_LEVEL
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#endif
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/* default memLevel */
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#define STORED_BLOCK 0
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#define STATIC_TREES 1
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#define DYN_TREES 2
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/* The three kinds of block type */
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#define STD_MIN_MATCH 3
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#define STD_MAX_MATCH 258
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/* The minimum and maximum match lengths mandated by the deflate standard */
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#define WANT_MIN_MATCH 4
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/* The minimum wanted match length, affects deflate_quick, deflate_fast, deflate_medium and deflate_slow */
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#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
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#define ADLER32_INITIAL_VALUE 1 /* initial adler-32 hash value */
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#define CRC32_INITIAL_VALUE 0 /* initial crc-32 hash value */
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#define ZLIB_WRAPLEN 6 /* zlib format overhead */
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#define GZIP_WRAPLEN 18 /* gzip format overhead */
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#define DEFLATE_HEADER_BITS 3
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#define DEFLATE_EOBS_BITS 15
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#define DEFLATE_PAD_BITS 6
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#define DEFLATE_BLOCK_OVERHEAD ((DEFLATE_HEADER_BITS + DEFLATE_EOBS_BITS + DEFLATE_PAD_BITS) >> 3)
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/* deflate block overhead: 3 bits for block start + 15 bits for block end + padding to nearest byte */
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#define DEFLATE_QUICK_LIT_MAX_BITS 9
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#define DEFLATE_QUICK_OVERHEAD(x) ((x * (DEFLATE_QUICK_LIT_MAX_BITS - 8) + 7) >> 3)
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/* deflate_quick worst-case overhead: 9 bits per literal, round up to next byte (+7) */
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/* target dependencies */
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#ifdef AMIGA
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# define OS_CODE 1
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#endif
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#ifdef __370__
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# if __TARGET_LIB__ < 0x20000000
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# define OS_CODE 4
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# elif __TARGET_LIB__ < 0x40000000
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# define OS_CODE 11
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# else
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# define OS_CODE 8
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# endif
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#endif
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#if defined(ATARI) || defined(atarist)
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# define OS_CODE 5
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#endif
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#ifdef OS2
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# define OS_CODE 6
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#endif
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#if defined(MACOS) || defined(TARGET_OS_MAC)
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# define OS_CODE 7
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#endif
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#ifdef __acorn
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# define OS_CODE 13
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#endif
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#if defined(_WIN32) && !defined(__CYGWIN__)
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# define OS_CODE 10
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#endif
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#ifdef __APPLE__
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# define OS_CODE 19
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#endif
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/* common defaults */
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#ifndef OS_CODE
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# define OS_CODE 3 /* assume Unix */
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#endif
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/* macros */
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#define CHECK_VER_STSIZE(_ver,_stsize) ((_ver) == NULL || (_ver)[0] != PREFIX2(VERSION)[0] || (_stsize) != (int32_t)sizeof(PREFIX3(stream)))
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/* memory allocation functions */
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void Z_INTERNAL *PREFIX(zcalloc)(void *opaque, unsigned items, unsigned size);
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void Z_INTERNAL PREFIX(zcfree)(void *opaque, void *ptr);
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typedef void *zng_calloc_func(void *opaque, unsigned items, unsigned size);
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typedef void zng_cfree_func(void *opaque, void *ptr);
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void Z_INTERNAL *PREFIX3(alloc_aligned)(zng_calloc_func zalloc, void *opaque, unsigned items, unsigned size, unsigned align);
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void Z_INTERNAL PREFIX3(free_aligned)(zng_cfree_func zfree, void *opaque, void *ptr);
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#define ZALLOC(strm, items, size) PREFIX3(alloc_aligned)((strm)->zalloc, (strm)->opaque, (items), (size), 64)
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#define ZFREE(strm, addr) PREFIX3(free_aligned)((strm)->zfree, (strm)->opaque, (void *)(addr))
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#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
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#endif /* ZUTIL_H_ */
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