124 lines
11 KiB
C
Executable file
124 lines
11 KiB
C
Executable file
/*================================================================================================*\
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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 file describes a set of functions that can be used to create, manipulate ||
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|| and terminate a bitstream. These functions facilitate the creation or reading ||
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|| of a compressed bwc codestream and can emit/extract information on a per bit, ||
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|| symbol (64-bit) or string basis. ||
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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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#ifndef BITSTREAM_H
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#define BITSTREAM_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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#include "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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/*----------------------------------------------------------------------------------------------*\
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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 read/assemble a packed codestream during coding. The !
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! byte buffer is flushed to the packed stream as soon as the a single byte has !
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! been assembled. !
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! !
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\*----------------------------------------------------------------------------------------------*/
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typedef struct
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{
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uchar error; // Error flag used during streaming.
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uint64 L; // Number of bytes written to/from stream.
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uint64 Lmax; // Size of packed stream.
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uint64 size_incr; // Size incrmnt used for stream assembly.
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uint8 T; // Byte buffer.
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int8 t; // Byte buffer counter.
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uchar *memory; // Memory handle for packed stream chunck.
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} bitstream;
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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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uint64 bytes_used (bitstream const *const stream);
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//==========|==========================|======================|======|======|=====================
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bitstream* init_stream (uchar *const memory,
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uint32 const size,
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char const instr);
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//==========|==========================|======================|======|======|=====================
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void emit_chunck (bitstream *const stream,
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uchar const *const chunck,
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uint64 const size);
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//==========|==========================|======================|======|======|=====================
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void emit_symbol (bitstream *const stream,
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uint64 const symbol,
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uint8 const size);
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//==========|==========================|======================|======|======|=====================
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void emit_bit (bitstream *const stream,
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uint64 const bit);
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//==========|==========================|======================|======|======|=====================
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void flush_stream (bitstream *const stream);
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//==========|==========================|======================|======|======|=====================
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uchar* get_chunck (bitstream *const stream,
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uint64 const length);
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//==========|==========================|======================|======|======|=====================
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uint64 get_symbol (bitstream *const stream,
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uint8 const length);
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//==========|==========================|======================|======|======|=====================
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uchar get_bit (bitstream *const stream);
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//==========|==========================|======================|======|======|=====================
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uchar terminate_stream (bitstream *stream,
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bwc_stream *const packed_stream);
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//==========|==========================|======================|======|======|=====================
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void release_packed_stream (bwc_stream *const stream);
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#endif
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