diff options
Diffstat (limited to 'third_party/libopenjpeg20/raw.c')
| -rw-r--r-- | third_party/libopenjpeg20/raw.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/third_party/libopenjpeg20/raw.c b/third_party/libopenjpeg20/raw.c new file mode 100644 index 0000000000..2498761c42 --- /dev/null +++ b/third_party/libopenjpeg20/raw.c @@ -0,0 +1,95 @@ +/* + * 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; +} + |