mirror of
https://github.com/mamedev/mame.git
synced 2024-11-16 07:48:32 +01:00
05e69b43e9
* 3rdparty/zstd: Added Zstandard compression library version 1.5.5. * util/unzip.cpp: Added support for Zstandard compression (method 93). * util/chdcodec.cpp: Added support for Zstandard compression. * 3rdparty/flac: Always define NDEBUG to avoid log spam.
91 lines
3.6 KiB
C
91 lines
3.6 KiB
C
/*
|
|
* Copyright (c) Meta Platforms, Inc. and affiliates.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under both the BSD-style license (found in the
|
|
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
|
|
* in the COPYING file in the root directory of this source tree).
|
|
* You may select, at your option, one of the above-listed licenses.
|
|
*/
|
|
|
|
#ifndef ZSTD_ZLIBWRAPPER_H
|
|
#define ZSTD_ZLIBWRAPPER_H
|
|
|
|
#if defined (__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
#define ZLIB_CONST
|
|
#define Z_PREFIX
|
|
#define ZLIB_INTERNAL /* disables gz*64 functions but fixes zlib 1.2.4 with Z_PREFIX */
|
|
#include <zlib.h>
|
|
|
|
#if !defined(z_const)
|
|
#define z_const
|
|
#endif
|
|
|
|
#if !defined(_Z_OF)
|
|
#define _Z_OF OF
|
|
#endif
|
|
|
|
/* returns a string with version of zstd library */
|
|
const char * zstdVersion(void);
|
|
|
|
|
|
/*** COMPRESSION ***/
|
|
/* ZWRAP_useZSTDcompression() enables/disables zstd compression during runtime.
|
|
By default zstd compression is disabled. To enable zstd compression please use one of the methods:
|
|
- compilation with the additional option -DZWRAP_USE_ZSTD=1
|
|
- using '#define ZWRAP_USE_ZSTD 1' in source code before '#include "zstd_zlibwrapper.h"'
|
|
- calling ZWRAP_useZSTDcompression(1)
|
|
All above-mentioned methods will enable zstd compression for all threads.
|
|
Be aware that ZWRAP_useZSTDcompression() is not thread-safe and may lead to a race condition. */
|
|
void ZWRAP_useZSTDcompression(int turn_on);
|
|
|
|
/* checks if zstd compression is turned on */
|
|
int ZWRAP_isUsingZSTDcompression(void);
|
|
|
|
/* Changes a pledged source size for a given compression stream.
|
|
It will change ZSTD compression parameters what may improve compression speed and/or ratio.
|
|
The function should be called just after deflateInit() or deflateReset() and before deflate() or deflateSetDictionary().
|
|
It's only helpful when data is compressed in blocks.
|
|
There will be no change in case of deflateInit() or deflateReset() immediately followed by deflate(strm, Z_FINISH)
|
|
as this case is automatically detected. */
|
|
int ZWRAP_setPledgedSrcSize(z_streamp strm, unsigned long long pledgedSrcSize);
|
|
|
|
/* Similar to deflateReset but preserves dictionary set using deflateSetDictionary.
|
|
It should improve compression speed because there will be less calls to deflateSetDictionary
|
|
When using zlib compression this method redirects to deflateReset. */
|
|
int ZWRAP_deflateReset_keepDict(z_streamp strm);
|
|
|
|
|
|
|
|
/*** DECOMPRESSION ***/
|
|
typedef enum { ZWRAP_FORCE_ZLIB, ZWRAP_AUTO } ZWRAP_decompress_type;
|
|
|
|
/* ZWRAP_setDecompressionType() enables/disables automatic recognition of zstd/zlib compressed data during runtime.
|
|
By default auto-detection of zstd and zlib streams in enabled (ZWRAP_AUTO).
|
|
Forcing zlib decompression with ZWRAP_setDecompressionType(ZWRAP_FORCE_ZLIB) slightly improves
|
|
decompression speed of zlib-encoded streams.
|
|
Be aware that ZWRAP_setDecompressionType() is not thread-safe and may lead to a race condition. */
|
|
void ZWRAP_setDecompressionType(ZWRAP_decompress_type type);
|
|
|
|
/* checks zstd decompression type */
|
|
ZWRAP_decompress_type ZWRAP_getDecompressionType(void);
|
|
|
|
/* Checks if zstd decompression is used for a given stream.
|
|
If will return 1 only when inflate() was called and zstd header was detected. */
|
|
int ZWRAP_isUsingZSTDdecompression(z_streamp strm);
|
|
|
|
/* Similar to inflateReset but preserves dictionary set using inflateSetDictionary.
|
|
inflate() will return Z_NEED_DICT only for the first time what will improve decompression speed.
|
|
For zlib streams this method redirects to inflateReset. */
|
|
int ZWRAP_inflateReset_keepDict(z_streamp strm);
|
|
|
|
|
|
#if defined (__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* ZSTD_ZLIBWRAPPER_H */
|