2003-11-27 11:10:17 +01:00
|
|
|
/*
|
2007-01-15 10:55:40 +01:00
|
|
|
* Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
|
|
|
|
* Copyright (c) 2002-2007, Professor Benoit Macq
|
|
|
|
* Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
|
|
|
|
* Copyright (c) 2005, Herve Drolon, FreeImage Team
|
2003-11-27 11:10:17 +01:00
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
2005-12-02 14:34:15 +01:00
|
|
|
#include "opj_includes.h"
|
2003-11-27 11:10:17 +01:00
|
|
|
|
2005-12-02 14:34:15 +01:00
|
|
|
/*
|
|
|
|
==========================================================
|
|
|
|
local functions
|
|
|
|
==========================================================
|
|
|
|
*/
|
2003-11-27 11:10:17 +01:00
|
|
|
|
|
|
|
|
2005-12-02 14:34:15 +01:00
|
|
|
/*
|
|
|
|
==========================================================
|
|
|
|
RAW encoding interface
|
|
|
|
==========================================================
|
|
|
|
*/
|
|
|
|
|
2007-08-21 14:02:23 +02:00
|
|
|
opj_raw_t* raw_create(void) {
|
2005-12-08 10:38:47 +01:00
|
|
|
opj_raw_t *raw = (opj_raw_t*)opj_malloc(sizeof(opj_raw_t));
|
|
|
|
return raw;
|
2003-11-27 11:10:17 +01:00
|
|
|
}
|
|
|
|
|
2005-12-02 14:34:15 +01:00
|
|
|
void raw_destroy(opj_raw_t *raw) {
|
2005-12-08 10:38:47 +01:00
|
|
|
if(raw) {
|
|
|
|
opj_free(raw);
|
|
|
|
}
|
2003-11-27 11:10:17 +01:00
|
|
|
}
|
|
|
|
|
2005-12-02 14:34:15 +01:00
|
|
|
int raw_numbytes(opj_raw_t *raw) {
|
2005-12-08 10:38:47 +01:00
|
|
|
return raw->bp - raw->start;
|
2005-12-02 14:34:15 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
void raw_init_dec(opj_raw_t *raw, unsigned char *bp, int len) {
|
2005-12-08 10:38:47 +01:00
|
|
|
raw->start = bp;
|
|
|
|
raw->lenmax = len;
|
|
|
|
raw->len = 0;
|
|
|
|
raw->c = 0;
|
|
|
|
raw->ct = 0;
|
2005-12-02 14:34:15 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
int raw_decode(opj_raw_t *raw) {
|
2005-12-08 10:38:47 +01:00
|
|
|
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;
|
2003-11-27 11:10:17 +01:00
|
|
|
}
|
2005-12-02 14:34:15 +01:00
|
|
|
|