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/*
* The copyright in this software is being made available under the 2-clauses
* BSD License, included below. This software may be subject to other third
* party and contributor rights, including patent rights, and no such rights
* are granted under this license.
*
* Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
* Copyright (c) 2002-2014, Professor Benoit Macq
* Copyright (c) 2003-2007, Francois-Olivier Devaux
* Copyright (c) 2003-2014, Antonin Descampe
* Copyright (c) 2005, Herve Drolon, FreeImage Team
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "opj_includes.h"
/*
==========================================================
local functions
==========================================================
*/
/*
==========================================================
RAW encoding interface
==========================================================
*/
opj_raw_t* opj_raw_create(void) {
opj_raw_t *raw = (opj_raw_t*)opj_malloc(sizeof(opj_raw_t));
return raw;
}
void opj_raw_destroy(opj_raw_t *raw) {
if(raw) {
opj_free(raw);
}
}
OPJ_UINT32 opj_raw_numbytes(opj_raw_t *raw) {
const ptrdiff_t diff = raw->bp - raw->start;
assert( diff <= (ptrdiff_t)0xffffffff && diff >= 0 ); /* UINT32_MAX */
return (OPJ_UINT32)diff;
}
void opj_raw_init_dec(opj_raw_t *raw, OPJ_BYTE *bp, OPJ_UINT32 len) {
raw->start = bp;
raw->lenmax = len;
raw->len = 0;
raw->c = 0;
raw->ct = 0;
}
OPJ_UINT32 opj_raw_decode(opj_raw_t *raw) {
OPJ_UINT32 d;
if (raw->ct == 0) {
raw->ct = 8;
if (raw->len == raw->lenmax) {
raw->c = 0xff;
} else {
if (raw->c == 0xff) {
raw->ct = 7;
}
raw->c = *(raw->start + raw->len);
raw->len++;
}
}
raw->ct--;
d = (raw->c >> raw->ct) & 0x01;
return d;
}
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