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/*
* Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
* Copyright (c) 2005, Herv Drolon, FreeImage Team
* Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
* 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* raw_create() {
opj_raw_t *raw = (opj_raw_t*)opj_malloc(sizeof(opj_raw_t));
return raw;
}
void raw_destroy(opj_raw_t *raw) {
if(raw) {
opj_free(raw);
}
}
int raw_numbytes(opj_raw_t *raw) {
return (int)(raw->bp - raw->start);
}
void raw_init_dec(opj_raw_t *raw, unsigned char *bp, int len) {
raw->start = bp;
raw->lenmax = len;
raw->len = 0;
raw->c = 0;
raw->ct = 0;
}
int raw_decode(opj_raw_t *raw) {
int 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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