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/*================================================================================================*\
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|| ||
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|| /$$$$$$$ /$$ /$$ /$$ /$$ ||
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|| | $$__ $$|__/ | $$ /$ | $$| $$ ||
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|| | $$ \ $$ /$$ /$$$$$$ | $$ /$$$| $$| $$$$$$$ /$$$$$$ /$$$$$$ /$$$$$$ ||
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|| | $$$$$$$ | $$ /$$__ $$ | $$/$$ $$ $$| $$__ $$ /$$__ $$ /$$__ $$ /$$__ $$ ||
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|| | $$__ $$| $$| $$ \ $$ | $$$$_ $$$$| $$ \ $$| $$ \ $$| $$ \ $$| $$ \ $$ ||
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|| | $$ \ $$| $$| $$ | $$ | $$$/ \ $$$| $$ | $$| $$ | $$| $$ | $$| $$ | $$ ||
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|| | $$$$$$$/| $$| $$$$$$$ | $$/ \ $$| $$ | $$| $$$$$$/| $$$$$$/| $$$$$$$/ ||
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|| |_______/ |__/ \____ $$ |__/ \__/|__/ |__/ \______/ \______/ | $$____/ ||
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|| /$$ \ $$ | $$ ||
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|| | $$$$$$/ | $$ ||
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|| \______/ |__/ ||
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|| ||
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|| DESCRIPTION: ||
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|| ------------ ||
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|| ||
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|| This header defines a the bit coder and its context states used during the ||
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|| entropy encoding stage of the BigWhoop compression library. ||
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|| ||
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|| -------------------------------------------------------------------------------------------- ||
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|| Copyright (c) 2023, High Performance Computing Center - University of Stuttgart ||
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|| ||
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|| Redistribution and use in source and binary forms, with or without modification, are ||
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|| permitted provided that the following conditions are met: ||
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|| ||
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|| (1) Redistributions of source code must retain the above copyright notice, this list of ||
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|| conditions and the following disclaimer. ||
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|| ||
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|| (2) Redistributions in binary form must reproduce the above copyright notice, this list ||
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|| of conditions and the following disclaimer in the documentation and/or other ||
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|| materials provided with the distribution. ||
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|| ||
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|| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS ||
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|| OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF ||
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|| MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ||
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|| COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ||
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|| EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF ||
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|| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ||
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|| HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR ||
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|| TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, ||
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|| EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ||
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|| ||
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\*================================================================================================*/
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2023-06-20 11:43:33 +00:00
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#ifndef MQ_TYPES_H
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#define MQ_TYPES_H
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/************************************************************************************************\
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|| _ _ _ ____ _ _ _ ___ ____ ||
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|| | |\ | | | | | | \ |___ ||
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|| | | \| |___ |___ |__| |__/ |___ ||
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|| ||
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\************************************************************************************************/
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#include <stdint.h>
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2023-06-20 11:43:33 +00:00
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/************************************************************************************************\
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|| ___ ____ ____ ____ _ _ _ ____ ___ ___ _ _ ___ ____ ____ ||
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|| | \ |___ |__/ |__/ | | | |___ | \ | \_/ |__] |___ [__ ||
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|| |__/ |___ | \ | \ | \/ |___ |__/ | | | |___ ___] ||
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|| ||
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\************************************************************************************************/
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/*----------------------------------------------------------------------------------------------*\
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! !
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! DESCRIPTION: !
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! ------------ !
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! !
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! This structure is used to directly access the parameter codeblocks during !
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! entropy (de-)encoding to facilitate shared memory parallelization. !
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! !
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\*----------------------------------------------------------------------------------------------*/
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typedef struct context
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{
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uint16_t p; // LPS probability estimate
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uint8_t sk; // Most probable symbol
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const struct context *const MPS; // New context for Most Probable Symbol
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const struct context *const LPS; // New context for Least Probable Symbol
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} bwc_context_state;
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2024-02-22 10:27:40 +00:00
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/*----------------------------------------------------------------------------------------------*\
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! !
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! DESCRIPTION: !
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! ------------ !
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! !
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! DESCRIPTION NEEDED !
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! | | !
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! !
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\*----------------------------------------------------------------------------------------------*/
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typedef struct state
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{
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int64_t L; // Number of bytes generated so far
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uint32_t C; // Register def. lower bound of coding int
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uint16_t A; // Register def. upper bound of coding int
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int8_t t; // Counter evaluating when moving C into b
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unsigned char *b; // Byte buffer
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unsigned char T; // Temporary byte buffer
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struct state *next; // State of the next coding phase
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struct state *prev; // State of the previous coding phase
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} bwc_coder_state;
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/*----------------------------------------------------------------------------------------------*\
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! !
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! DESCRIPTION: !
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! ------------ !
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! !
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! DESCRIPTION NEEDED !
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! | | !
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! !
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\*----------------------------------------------------------------------------------------------*/
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typedef struct
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{
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int64_t Lmax; // Number of code bytes (used by decoder)
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uint8_t nContext; // No. tracked context states
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unsigned char *b; // Temporary byte buffer
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bwc_coder_state *state; // State for the current coding pass
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bwc_context_state const **context; // States for the current coding pass
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} bwc_bit_coder;
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2023-06-20 11:43:33 +00:00
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#endif
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