128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
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/*
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* Copyright (c) 2001-2002, David Janssens
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* Copyright (c) 2002-2003, Yannick Verschueren
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* Copyright (c) 2002-2003, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
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* All rights reserved.
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*
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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
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* are met:
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other 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'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* 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
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __MQC_H
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#define __MQC_H
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/*
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* Return the number of bytes written/read since initialisation
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*/
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int mqc_numbytes();
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/*
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* Reset the states of all the context of the coder/decoder
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* (each context is set to a state where 0 and 1 are more or less equiprobable)
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*/
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void mqc_resetstates();
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/*
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* Set the state of a particular context
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* ctxno: number that identifies the context
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* msb: the MSB of the new state of the context
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* prob: number that identifies the probability of the symbols for the new state of the context
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*/
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void mqc_setstate(int ctxno, int msb, int prob);
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/*
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* Initialize the encoder
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* bp: pointer to the start of the buffer where the bytes will be written
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*/
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void mqc_init_enc(unsigned char *bp);
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/*
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* Set the current context used for coding/decoding
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* ctxno: number that identifies the context
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*/
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void mqc_setcurctx(int ctxno);
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/*
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* Encode a bit
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* d: bit to encode (0 or 1)
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*/
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void mqc_encode(int d);
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/*
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* Flush the encoder, so that all remaining data is written
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*/
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void mqc_flush();
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/*
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* BYPASS mode switch
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*/
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void mqc_bypass_init_enc();
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/*
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* BYPASS mode switch
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*/
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void mqc_bypass_enc(int d);
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/*
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* BYPASS mode switch
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*/
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int mqc_bypass_flush_enc();
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/*
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* RESET mode switch
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*/
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void mqc_reset_enc();
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/*
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* RESTART mode switch (TERMALL)
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*/
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int mqc_restart_enc();
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/*
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* RESTART mode switch (TERMALL)
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*/
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void mqc_restart_init_enc();
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/*
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* ERTERM mode switch (PTERM)
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*/
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void mqc_erterm_enc();
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/*
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* SEGMARK mode switch (SEGSYM)
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*/
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void mqc_segmark_enc();
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/*
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* Initialize the decoder
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* bp: pointer to the start of the buffer from which the bytes will be read
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* len: length of the input buffer
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*/
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void mqc_init_dec(unsigned char *bp, int len);
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/*
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* Decode a bit (returns 0 or 1)
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*/
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int mqc_decode();
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#endif
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