/*
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* The copyright in this software is being made available under the 2-clauses
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* BSD License, included below. This software may be subject to other third
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* party and contributor rights, including patent rights, and no such rights
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* are granted under this license.
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*
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* Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
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* Copyright (c) 2002-2014, Professor Benoit Macq
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* Copyright (c) 2003-2007, Francois-Olivier Devaux
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* Copyright (c) 2003-2014, Antonin Descampe
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* Copyright (c) 2005, Herve Drolon, FreeImage Team
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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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#include "opj_includes.h"
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/*
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==========================================================
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local functions
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==========================================================
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*/
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/*
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==========================================================
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RAW encoding interface
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==========================================================
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*/
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opj_raw_t* opj_raw_create(void) {
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opj_raw_t *raw = (opj_raw_t*)opj_malloc(sizeof(opj_raw_t));
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return raw;
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}
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void opj_raw_destroy(opj_raw_t *raw) {
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if(raw) {
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opj_free(raw);
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}
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}
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OPJ_UINT32 opj_raw_numbytes(opj_raw_t *raw) {
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const ptrdiff_t diff = raw->bp - raw->start;
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assert( diff <= (ptrdiff_t)0xffffffff && diff >= 0 ); /* UINT32_MAX */
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return (OPJ_UINT32)diff;
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}
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void opj_raw_init_dec(opj_raw_t *raw, OPJ_BYTE *bp, OPJ_UINT32 len) {
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raw->start = bp;
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raw->lenmax = len;
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raw->len = 0;
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raw->c = 0;
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raw->ct = 0;
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}
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OPJ_UINT32 opj_raw_decode(opj_raw_t *raw) {
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OPJ_UINT32 d;
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if (raw->ct == 0) {
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raw->ct = 8;
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if (raw->len == raw->lenmax) {
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raw->c = 0xff;
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} else {
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if (raw->c == 0xff) {
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raw->ct = 7;
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}
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raw->c = *(raw->start + raw->len);
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raw->len++;
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}
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}
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raw->ct--;
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d = (raw->c >> raw->ct) & 0x01;
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return d;
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}
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