mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 13:14:27 +00:00
8509f22aac
Add the zstd library from Linux kernel (only decompression support). There are minimal changes to build with U-Boot, otherwise the files are identical to Linux commit dc35da16 from March 2018, the files had not been touched since in kernel. Also SPDX lincese tags were added. Signed-off-by: Marek Behún <marek.behun@nic.cz>
182 lines
10 KiB
C
182 lines
10 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 or BSD-2-Clause) */
|
|
/*
|
|
* Huffman coder, part of New Generation Entropy library
|
|
* header file
|
|
* Copyright (C) 2013-2016, Yann Collet.
|
|
*
|
|
* You can contact the author at :
|
|
* - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
|
|
*/
|
|
#ifndef HUF_H_298734234
|
|
#define HUF_H_298734234
|
|
|
|
/* *** Dependencies *** */
|
|
#include <linux/types.h> /* size_t */
|
|
|
|
/* *** Tool functions *** */
|
|
#define HUF_BLOCKSIZE_MAX (128 * 1024) /**< maximum input size for a single block compressed with HUF_compress */
|
|
size_t HUF_compressBound(size_t size); /**< maximum compressed size (worst case) */
|
|
|
|
/* Error Management */
|
|
unsigned HUF_isError(size_t code); /**< tells if a return value is an error code */
|
|
|
|
/* *** Advanced function *** */
|
|
|
|
/** HUF_compress4X_wksp() :
|
|
* Same as HUF_compress2(), but uses externally allocated `workSpace`, which must be a table of >= 1024 unsigned */
|
|
size_t HUF_compress4X_wksp(void *dst, size_t dstSize, const void *src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog, void *workSpace,
|
|
size_t wkspSize); /**< `workSpace` must be a table of at least HUF_COMPRESS_WORKSPACE_SIZE_U32 unsigned */
|
|
|
|
/* *** Dependencies *** */
|
|
#include "mem.h" /* U32 */
|
|
|
|
/* *** Constants *** */
|
|
#define HUF_TABLELOG_MAX 12 /* max configured tableLog (for static allocation); can be modified up to HUF_ABSOLUTEMAX_TABLELOG */
|
|
#define HUF_TABLELOG_DEFAULT 11 /* tableLog by default, when not specified */
|
|
#define HUF_SYMBOLVALUE_MAX 255
|
|
|
|
#define HUF_TABLELOG_ABSOLUTEMAX 15 /* absolute limit of HUF_MAX_TABLELOG. Beyond that value, code does not work */
|
|
#if (HUF_TABLELOG_MAX > HUF_TABLELOG_ABSOLUTEMAX)
|
|
#error "HUF_TABLELOG_MAX is too large !"
|
|
#endif
|
|
|
|
/* ****************************************
|
|
* Static allocation
|
|
******************************************/
|
|
/* HUF buffer bounds */
|
|
#define HUF_CTABLEBOUND 129
|
|
#define HUF_BLOCKBOUND(size) (size + (size >> 8) + 8) /* only true if incompressible pre-filtered with fast heuristic */
|
|
#define HUF_COMPRESSBOUND(size) (HUF_CTABLEBOUND + HUF_BLOCKBOUND(size)) /* Macro version, useful for static allocation */
|
|
|
|
/* static allocation of HUF's Compression Table */
|
|
#define HUF_CREATE_STATIC_CTABLE(name, maxSymbolValue) \
|
|
U32 name##hb[maxSymbolValue + 1]; \
|
|
void *name##hv = &(name##hb); \
|
|
HUF_CElt *name = (HUF_CElt *)(name##hv) /* no final ; */
|
|
|
|
/* static allocation of HUF's DTable */
|
|
typedef U32 HUF_DTable;
|
|
#define HUF_DTABLE_SIZE(maxTableLog) (1 + (1 << (maxTableLog)))
|
|
#define HUF_CREATE_STATIC_DTABLEX2(DTable, maxTableLog) HUF_DTable DTable[HUF_DTABLE_SIZE((maxTableLog)-1)] = {((U32)((maxTableLog)-1) * 0x01000001)}
|
|
#define HUF_CREATE_STATIC_DTABLEX4(DTable, maxTableLog) HUF_DTable DTable[HUF_DTABLE_SIZE(maxTableLog)] = {((U32)(maxTableLog)*0x01000001)}
|
|
|
|
/* The workspace must have alignment at least 4 and be at least this large */
|
|
#define HUF_COMPRESS_WORKSPACE_SIZE (6 << 10)
|
|
#define HUF_COMPRESS_WORKSPACE_SIZE_U32 (HUF_COMPRESS_WORKSPACE_SIZE / sizeof(U32))
|
|
|
|
/* The workspace must have alignment at least 4 and be at least this large */
|
|
#define HUF_DECOMPRESS_WORKSPACE_SIZE (3 << 10)
|
|
#define HUF_DECOMPRESS_WORKSPACE_SIZE_U32 (HUF_DECOMPRESS_WORKSPACE_SIZE / sizeof(U32))
|
|
|
|
/* ****************************************
|
|
* Advanced decompression functions
|
|
******************************************/
|
|
size_t HUF_decompress4X_DCtx_wksp(HUF_DTable *dctx, void *dst, size_t dstSize, const void *cSrc, size_t cSrcSize, void *workspace, size_t workspaceSize); /**< decodes RLE and uncompressed */
|
|
size_t HUF_decompress4X_hufOnly_wksp(HUF_DTable *dctx, void *dst, size_t dstSize, const void *cSrc, size_t cSrcSize, void *workspace,
|
|
size_t workspaceSize); /**< considers RLE and uncompressed as errors */
|
|
size_t HUF_decompress4X2_DCtx_wksp(HUF_DTable *dctx, void *dst, size_t dstSize, const void *cSrc, size_t cSrcSize, void *workspace,
|
|
size_t workspaceSize); /**< single-symbol decoder */
|
|
size_t HUF_decompress4X4_DCtx_wksp(HUF_DTable *dctx, void *dst, size_t dstSize, const void *cSrc, size_t cSrcSize, void *workspace,
|
|
size_t workspaceSize); /**< double-symbols decoder */
|
|
|
|
/* ****************************************
|
|
* HUF detailed API
|
|
******************************************/
|
|
/*!
|
|
HUF_compress() does the following:
|
|
1. count symbol occurrence from source[] into table count[] using FSE_count()
|
|
2. (optional) refine tableLog using HUF_optimalTableLog()
|
|
3. build Huffman table from count using HUF_buildCTable()
|
|
4. save Huffman table to memory buffer using HUF_writeCTable_wksp()
|
|
5. encode the data stream using HUF_compress4X_usingCTable()
|
|
|
|
The following API allows targeting specific sub-functions for advanced tasks.
|
|
For example, it's possible to compress several blocks using the same 'CTable',
|
|
or to save and regenerate 'CTable' using external methods.
|
|
*/
|
|
/* FSE_count() : find it within "fse.h" */
|
|
unsigned HUF_optimalTableLog(unsigned maxTableLog, size_t srcSize, unsigned maxSymbolValue);
|
|
typedef struct HUF_CElt_s HUF_CElt; /* incomplete type */
|
|
size_t HUF_writeCTable_wksp(void *dst, size_t maxDstSize, const HUF_CElt *CTable, unsigned maxSymbolValue, unsigned huffLog, void *workspace, size_t workspaceSize);
|
|
size_t HUF_compress4X_usingCTable(void *dst, size_t dstSize, const void *src, size_t srcSize, const HUF_CElt *CTable);
|
|
|
|
typedef enum {
|
|
HUF_repeat_none, /**< Cannot use the previous table */
|
|
HUF_repeat_check, /**< Can use the previous table but it must be checked. Note : The previous table must have been constructed by HUF_compress{1,
|
|
4}X_repeat */
|
|
HUF_repeat_valid /**< Can use the previous table and it is asumed to be valid */
|
|
} HUF_repeat;
|
|
/** HUF_compress4X_repeat() :
|
|
* Same as HUF_compress4X_wksp(), but considers using hufTable if *repeat != HUF_repeat_none.
|
|
* If it uses hufTable it does not modify hufTable or repeat.
|
|
* If it doesn't, it sets *repeat = HUF_repeat_none, and it sets hufTable to the table used.
|
|
* If preferRepeat then the old table will always be used if valid. */
|
|
size_t HUF_compress4X_repeat(void *dst, size_t dstSize, const void *src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog, void *workSpace,
|
|
size_t wkspSize, HUF_CElt *hufTable, HUF_repeat *repeat,
|
|
int preferRepeat); /**< `workSpace` must be a table of at least HUF_COMPRESS_WORKSPACE_SIZE_U32 unsigned */
|
|
|
|
/** HUF_buildCTable_wksp() :
|
|
* Same as HUF_buildCTable(), but using externally allocated scratch buffer.
|
|
* `workSpace` must be aligned on 4-bytes boundaries, and be at least as large as a table of 1024 unsigned.
|
|
*/
|
|
size_t HUF_buildCTable_wksp(HUF_CElt *tree, const U32 *count, U32 maxSymbolValue, U32 maxNbBits, void *workSpace, size_t wkspSize);
|
|
|
|
/*! HUF_readStats() :
|
|
Read compact Huffman tree, saved by HUF_writeCTable().
|
|
`huffWeight` is destination buffer.
|
|
@return : size read from `src` , or an error Code .
|
|
Note : Needed by HUF_readCTable() and HUF_readDTableXn() . */
|
|
size_t HUF_readStats_wksp(BYTE *huffWeight, size_t hwSize, U32 *rankStats, U32 *nbSymbolsPtr, U32 *tableLogPtr, const void *src, size_t srcSize,
|
|
void *workspace, size_t workspaceSize);
|
|
|
|
/** HUF_readCTable() :
|
|
* Loading a CTable saved with HUF_writeCTable() */
|
|
size_t HUF_readCTable_wksp(HUF_CElt *CTable, unsigned maxSymbolValue, const void *src, size_t srcSize, void *workspace, size_t workspaceSize);
|
|
|
|
/*
|
|
HUF_decompress() does the following:
|
|
1. select the decompression algorithm (X2, X4) based on pre-computed heuristics
|
|
2. build Huffman table from save, using HUF_readDTableXn()
|
|
3. decode 1 or 4 segments in parallel using HUF_decompressSXn_usingDTable
|
|
*/
|
|
|
|
/** HUF_selectDecoder() :
|
|
* Tells which decoder is likely to decode faster,
|
|
* based on a set of pre-determined metrics.
|
|
* @return : 0==HUF_decompress4X2, 1==HUF_decompress4X4 .
|
|
* Assumption : 0 < cSrcSize < dstSize <= 128 KB */
|
|
U32 HUF_selectDecoder(size_t dstSize, size_t cSrcSize);
|
|
|
|
size_t HUF_readDTableX2_wksp(HUF_DTable *DTable, const void *src, size_t srcSize, void *workspace, size_t workspaceSize);
|
|
size_t HUF_readDTableX4_wksp(HUF_DTable *DTable, const void *src, size_t srcSize, void *workspace, size_t workspaceSize);
|
|
|
|
size_t HUF_decompress4X_usingDTable(void *dst, size_t maxDstSize, const void *cSrc, size_t cSrcSize, const HUF_DTable *DTable);
|
|
size_t HUF_decompress4X2_usingDTable(void *dst, size_t maxDstSize, const void *cSrc, size_t cSrcSize, const HUF_DTable *DTable);
|
|
size_t HUF_decompress4X4_usingDTable(void *dst, size_t maxDstSize, const void *cSrc, size_t cSrcSize, const HUF_DTable *DTable);
|
|
|
|
/* single stream variants */
|
|
|
|
size_t HUF_compress1X_wksp(void *dst, size_t dstSize, const void *src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog, void *workSpace,
|
|
size_t wkspSize); /**< `workSpace` must be a table of at least HUF_COMPRESS_WORKSPACE_SIZE_U32 unsigned */
|
|
size_t HUF_compress1X_usingCTable(void *dst, size_t dstSize, const void *src, size_t srcSize, const HUF_CElt *CTable);
|
|
/** HUF_compress1X_repeat() :
|
|
* Same as HUF_compress1X_wksp(), but considers using hufTable if *repeat != HUF_repeat_none.
|
|
* If it uses hufTable it does not modify hufTable or repeat.
|
|
* If it doesn't, it sets *repeat = HUF_repeat_none, and it sets hufTable to the table used.
|
|
* If preferRepeat then the old table will always be used if valid. */
|
|
size_t HUF_compress1X_repeat(void *dst, size_t dstSize, const void *src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog, void *workSpace,
|
|
size_t wkspSize, HUF_CElt *hufTable, HUF_repeat *repeat,
|
|
int preferRepeat); /**< `workSpace` must be a table of at least HUF_COMPRESS_WORKSPACE_SIZE_U32 unsigned */
|
|
|
|
size_t HUF_decompress1X_DCtx_wksp(HUF_DTable *dctx, void *dst, size_t dstSize, const void *cSrc, size_t cSrcSize, void *workspace, size_t workspaceSize);
|
|
size_t HUF_decompress1X2_DCtx_wksp(HUF_DTable *dctx, void *dst, size_t dstSize, const void *cSrc, size_t cSrcSize, void *workspace,
|
|
size_t workspaceSize); /**< single-symbol decoder */
|
|
size_t HUF_decompress1X4_DCtx_wksp(HUF_DTable *dctx, void *dst, size_t dstSize, const void *cSrc, size_t cSrcSize, void *workspace,
|
|
size_t workspaceSize); /**< double-symbols decoder */
|
|
|
|
size_t HUF_decompress1X_usingDTable(void *dst, size_t maxDstSize, const void *cSrc, size_t cSrcSize,
|
|
const HUF_DTable *DTable); /**< automatic selection of sing or double symbol decoder, based on DTable */
|
|
size_t HUF_decompress1X2_usingDTable(void *dst, size_t maxDstSize, const void *cSrc, size_t cSrcSize, const HUF_DTable *DTable);
|
|
size_t HUF_decompress1X4_usingDTable(void *dst, size_t maxDstSize, const void *cSrc, size_t cSrcSize, const HUF_DTable *DTable);
|
|
|
|
#endif /* HUF_H_298734234 */
|