diff options
Diffstat (limited to 'debian/jasper/jasper-1.900.1-debian1/src/libjasper/pgx/pgx_dec.c')
| -rw-r--r-- | debian/jasper/jasper-1.900.1-debian1/src/libjasper/pgx/pgx_dec.c | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/debian/jasper/jasper-1.900.1-debian1/src/libjasper/pgx/pgx_dec.c b/debian/jasper/jasper-1.900.1-debian1/src/libjasper/pgx/pgx_dec.c new file mode 100644 index 00000000..560eae4a --- /dev/null +++ b/debian/jasper/jasper-1.900.1-debian1/src/libjasper/pgx/pgx_dec.c @@ -0,0 +1,414 @@ +/* + * Copyright (c) 2001-2003 Michael David Adams. + * All rights reserved. + */ + +/* __START_OF_JASPER_LICENSE__ + * + * JasPer License Version 2.0 + * + * Copyright (c) 2001-2006 Michael David Adams + * Copyright (c) 1999-2000 Image Power, Inc. + * Copyright (c) 1999-2000 The University of British Columbia + * + * All rights reserved. + * + * Permission is hereby granted, free of charge, to any person (the + * "User") obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, + * publish, distribute, and/or sell copies of the Software, and to permit + * persons to whom the Software is furnished to do so, subject to the + * following conditions: + * + * 1. The above copyright notices and this permission notice (which + * includes the disclaimer below) shall be included in all copies or + * substantial portions of the Software. + * + * 2. The name of a copyright holder shall not be used to endorse or + * promote products derived from the Software without specific prior + * written permission. + * + * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS + * LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER + * THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS + * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING + * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A + * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL + * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING + * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, + * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION + * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE + * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE + * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY. + * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS + * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL + * PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS + * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE + * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE + * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL + * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES, + * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL + * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH + * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH, + * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH + * RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY + * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES. + * + * __END_OF_JASPER_LICENSE__ + */ + +/******************************************************************************\ +* Includes. +\******************************************************************************/ + +#include <assert.h> +#include <ctype.h> + +#include "jasper/jas_tvp.h" +#include "jasper/jas_stream.h" +#include "jasper/jas_image.h" +#include "jasper/jas_string.h" + +#include "pgx_cod.h" + +/******************************************************************************\ +* Local prototypes. +\******************************************************************************/ + +static int pgx_gethdr(jas_stream_t *in, pgx_hdr_t *hdr); +static int pgx_getdata(jas_stream_t *in, pgx_hdr_t *hdr, jas_image_t *image); +static int_fast32_t pgx_getword(jas_stream_t *in, bool bigendian, int prec); +static int pgx_getsgnd(jas_stream_t *in, bool *sgnd); +static int pgx_getbyteorder(jas_stream_t *in, bool *bigendian); +static int pgx_getc(jas_stream_t *in); +static int pgx_getuint32(jas_stream_t *in, uint_fast32_t *val); +static jas_seqent_t pgx_wordtoint(uint_fast32_t word, int prec, bool sgnd); + +/******************************************************************************\ +* Code for load operation. +\******************************************************************************/ + +/* Load an image from a stream in the PGX format. */ + +jas_image_t *pgx_decode(jas_stream_t *in, char *optstr) +{ + jas_image_t *image; + pgx_hdr_t hdr; + jas_image_cmptparm_t cmptparm; + + /* Avoid compiler warnings about unused parameters. */ + optstr = 0; + + image = 0; + + if (pgx_gethdr(in, &hdr)) { + goto error; + } + +#ifdef PGX_DEBUG + pgx_dumphdr(stderr, &hdr); +#endif + + if (!(image = jas_image_create0())) { + goto error; + } + cmptparm.tlx = 0; + cmptparm.tly = 0; + cmptparm.hstep = 1; + cmptparm.vstep = 1; + cmptparm.width = hdr.width; + cmptparm.height = hdr.height; + cmptparm.prec = hdr.prec; + cmptparm.sgnd = hdr.sgnd; + if (jas_image_addcmpt(image, 0, &cmptparm)) { + goto error; + } + if (pgx_getdata(in, &hdr, image)) { + goto error; + } + + jas_image_setclrspc(image, JAS_CLRSPC_SGRAY); + jas_image_setcmpttype(image, 0, + JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_GRAY_Y)); + + return image; + +error: + if (image) { + jas_image_destroy(image); + } + return 0; +} + +/******************************************************************************\ +* Code for validate operation. +\******************************************************************************/ + +int pgx_validate(jas_stream_t *in) +{ + uchar buf[PGX_MAGICLEN]; + uint_fast32_t magic; + int i; + int n; + + assert(JAS_STREAM_MAXPUTBACK >= PGX_MAGICLEN); + + /* Read the validation data (i.e., the data used for detecting + the format). */ + if ((n = jas_stream_read(in, buf, PGX_MAGICLEN)) < 0) { + return -1; + } + + /* Put the validation data back onto the stream, so that the + stream position will not be changed. */ + for (i = n - 1; i >= 0; --i) { + if (jas_stream_ungetc(in, buf[i]) == EOF) { + return -1; + } + } + + /* Did we read enough data? */ + if (n < PGX_MAGICLEN) { + return -1; + } + + /* Compute the signature value. */ + magic = (buf[0] << 8) | buf[1]; + + /* Ensure that the signature is correct for this format. */ + if (magic != PGX_MAGIC) { + return -1; + } + + return 0; +} + +/******************************************************************************\ +* +\******************************************************************************/ + +static int pgx_gethdr(jas_stream_t *in, pgx_hdr_t *hdr) +{ + int c; + uchar buf[2]; + + if ((c = jas_stream_getc(in)) == EOF) { + goto error; + } + buf[0] = c; + if ((c = jas_stream_getc(in)) == EOF) { + goto error; + } + buf[1] = c; + hdr->magic = buf[0] << 8 | buf[1]; + if (hdr->magic != PGX_MAGIC) { + goto error; + } + if ((c = pgx_getc(in)) == EOF || !isspace(c)) { + goto error; + } + if (pgx_getbyteorder(in, &hdr->bigendian)) { + goto error; + } + if (pgx_getsgnd(in, &hdr->sgnd)) { + goto error; + } + if (pgx_getuint32(in, &hdr->prec)) { + goto error; + } + if (pgx_getuint32(in, &hdr->width)) { + goto error; + } + if (pgx_getuint32(in, &hdr->height)) { + goto error; + } + return 0; + +error: + return -1; +} + +static int pgx_getdata(jas_stream_t *in, pgx_hdr_t *hdr, jas_image_t *image) +{ + jas_matrix_t *data; + uint_fast32_t x; + uint_fast32_t y; + uint_fast32_t word; + int_fast32_t v; + + data = 0; + + if (!(data = jas_matrix_create(1, hdr->width))) { + goto error; + } + for (y = 0; y < hdr->height; ++y) { + for (x = 0; x < hdr->width; ++x) { + /* Need to adjust signed value. */ + if ((v = pgx_getword(in, hdr->bigendian, hdr->prec)) < 0) { + goto error; + } + word = v; + v = pgx_wordtoint(word, hdr->prec, hdr->sgnd); + jas_matrix_set(data, 0, x, v); + } + if (jas_image_writecmpt(image, 0, 0, y, hdr->width, 1, data)) { + goto error; + } + } + jas_matrix_destroy(data); + return 0; + +error: + if (data) { + jas_matrix_destroy(data); + } + return -1; +} + +static int_fast32_t pgx_getword(jas_stream_t *in, bool bigendian, int prec) +{ + uint_fast32_t val; + int i; + int j; + int c; + int wordsize; + + wordsize = (prec + 7) / 8; + + if (prec > 32) { + goto error; + } + + val = 0; + for (i = 0; i < wordsize; ++i) { + if ((c = jas_stream_getc(in)) == EOF) { + goto error; + } + j = bigendian ? (wordsize - 1 - i) : i; + val = val | ((c & 0xff) << (8 * j)); + } + val &= (1 << prec) - 1; + return val; + +error: + return -1; +} + +static int pgx_getc(jas_stream_t *in) +{ + int c; + for (;;) { + if ((c = jas_stream_getc(in)) == EOF) { + return -1; + } + if (c != '#') { + return c; + } + do { + if ((c = jas_stream_getc(in)) == EOF) { + return -1; + } + } while (c != '\n' && c != '\r'); + } +} + +static int pgx_getbyteorder(jas_stream_t *in, bool *bigendian) +{ + int c; + char buf[2]; + + do { + if ((c = pgx_getc(in)) == EOF) { + return -1; + } + } while (isspace(c)); + + buf[0] = c; + if ((c = pgx_getc(in)) == EOF) { + goto error; + } + buf[1] = c; + if (buf[0] == 'M' && buf[1] == 'L') { + *bigendian = true; + } else if (buf[0] == 'L' && buf[1] == 'M') { + *bigendian = false; + } else { + goto error; + } + + while ((c = pgx_getc(in)) != EOF && !isspace(c)) { + ; + } + if (c == EOF) { + goto error; + } + return 0; + +error: + return -1; +} + +static int pgx_getsgnd(jas_stream_t *in, bool *sgnd) +{ + int c; + + do { + if ((c = pgx_getc(in)) == EOF) { + return -1; + } + } while (isspace(c)); + + if (c == '+') { + *sgnd = false; + } else if (c == '-') { + *sgnd = true; + } else { + goto error; + } + while ((c = pgx_getc(in)) != EOF && !isspace(c)) { + ; + } + if (c == EOF) { + goto error; + } + return 0; + +error: + return -1; +} + +static int pgx_getuint32(jas_stream_t *in, uint_fast32_t *val) +{ + int c; + uint_fast32_t v; + + do { + if ((c = pgx_getc(in)) == EOF) { + return -1; + } + } while (isspace(c)); + + v = 0; + while (isdigit(c)) { + v = 10 * v + c - '0'; + if ((c = pgx_getc(in)) < 0) { + return -1; + } + } + if (!isspace(c)) { + return -1; + } + *val = v; + + return 0; +} + +static jas_seqent_t pgx_wordtoint(uint_fast32_t v, int prec, bool sgnd) +{ + jas_seqent_t ret; + v &= (1 << prec) - 1; + ret = (sgnd && (v & (1 << (prec - 1)))) ? (v - (1 << prec)) : v; + return ret; +} |