109 lines
4.6 KiB
C
109 lines
4.6 KiB
C
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/* ******************************************************************
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FSE : Finite State Entropy coder
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header file for static linking (only)
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Copyright (C) 2013-2015, Yann Collet
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BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following disclaimer
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in the documentation and/or other materials provided with the
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distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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You can contact the author at :
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- Source repository : https://github.com/Cyan4973/FiniteStateEntropy
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- Public forum : https://groups.google.com/forum/#!forum/lz4c
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****************************************************************** */
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#pragma once
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#if defined (__cplusplus)
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extern "C" {
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#endif
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/******************************************
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* Tool functions
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******************************************/
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#define FSE_MAX_HEADERSIZE 512
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#define FSE_COMPRESSBOUND(size) (size + (size>>7) + FSE_MAX_HEADERSIZE) /* Macro can be useful for static allocation */
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/******************************************
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* Static allocation
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******************************************/
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/* You can statically allocate a CTable as a table of U32 using below macro */
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#define FSE_CTABLE_SIZE_U32(maxTableLog, maxSymbolValue) (1 + (1<<(maxTableLog-1)) + ((maxSymbolValue+1)*2))
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#define FSE_DTABLE_SIZE_U32(maxTableLog) ((1<<maxTableLog)+1)
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/******************************************
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* FSE supported API for DLL
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******************************************/
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#include "fse.h"
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/******************************************
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* Error Management
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******************************************/
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#define FSE_LIST_ERRORS(ITEM) \
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ITEM(FSE_OK_NoError) ITEM(FSE_ERROR_GENERIC) \
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ITEM(FSE_ERROR_tableLog_tooLarge) ITEM(FSE_ERROR_maxSymbolValue_tooLarge) \
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ITEM(FSE_ERROR_dstSize_tooSmall) ITEM(FSE_ERROR_srcSize_wrong)\
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ITEM(FSE_ERROR_corruptionDetected) \
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ITEM(FSE_ERROR_maxCode)
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#define FSE_GENERATE_ENUM(ENUM) ENUM,
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typedef enum { FSE_LIST_ERRORS(FSE_GENERATE_ENUM) } FSE_errorCodes; /* enum is exposed, to detect & handle specific errors; compare function result to -enum value */
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/******************************************
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* FSE advanced API
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******************************************/
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size_t FSE_countFast(unsigned* count, const unsigned char* src, size_t srcSize, unsigned* maxSymbolValuePtr);
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/* same as FSE_count(), but won't check if input really respect that all values within src are <= *maxSymbolValuePtr */
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size_t FSE_buildCTable_raw (void* CTable, unsigned nbBits);
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/* create a fake CTable, designed to not compress an input where each element uses nbBits */
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size_t FSE_buildCTable_rle (void* CTable, unsigned char symbolValue);
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/* create a fake CTable, designed to compress a single identical value */
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size_t FSE_buildDTable_raw (void* DTable, unsigned nbBits);
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/* create a fake DTable, designed to read an uncompressed bitstream where each element uses nbBits */
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size_t FSE_buildDTable_rle (void* DTable, unsigned char symbolValue);
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/* create a fake DTable, designed to always generate the same symbolValue */
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/******************************************
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* FSE streaming API
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******************************************/
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bitD_t FSE_readBitsFast(FSE_DStream_t* bitD, unsigned nbBits);
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/* faster, but works only if nbBits >= 1 (otherwise, result will be corrupted) */
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unsigned char FSE_decodeSymbolFast(FSE_DState_t* DStatePtr, FSE_DStream_t* bitD);
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/* faster, but works only if nbBits >= 1 (otherwise, result will be corrupted) */
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#if defined (__cplusplus)
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}
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#endif
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