/* | |
* Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe | |
* Copyright (c) 2005, Herve 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 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; | |
} | |