| /* | |
| * 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; | |
| } | |