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Diffstat (limited to 'converter/other/jpeg2000/libjasper/jpc/jpc_bs.c')
| -rw-r--r-- | converter/other/jpeg2000/libjasper/jpc/jpc_bs.c | 478 |
1 files changed, 478 insertions, 0 deletions
diff --git a/converter/other/jpeg2000/libjasper/jpc/jpc_bs.c b/converter/other/jpeg2000/libjasper/jpc/jpc_bs.c new file mode 100644 index 00000000..54f0a819 --- /dev/null +++ b/converter/other/jpeg2000/libjasper/jpc/jpc_bs.c @@ -0,0 +1,478 @@ +/* + * Copyright (c) 1999-2000, Image Power, Inc. and the University of + * British Columbia. + * Copyright (c) 2001-2002 Michael David Adams. + * All rights reserved. + */ + +/* __START_OF_JASPER_LICENSE__ + * + * JasPer Software License + * + * IMAGE POWER JPEG-2000 PUBLIC LICENSE + * ************************************ + * + * GRANT: + * + * Permission is hereby granted, free of charge, to any person (the "User") + * obtaining a copy of this software and associated documentation, to deal + * in the JasPer Software without restriction, including without limitation + * the right to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the JasPer Software (in source and binary forms), + * and to permit persons to whom the JasPer Software is furnished to do so, + * provided further that the License Conditions below are met. + * + * License Conditions + * ****************** + * + * A. Redistributions of source code must retain the above copyright notice, + * and this list of conditions, and the following disclaimer. + * + * B. Redistributions in binary form must reproduce the above copyright + * notice, and this list of conditions, and the following disclaimer in + * the documentation and/or other materials provided with the distribution. + * + * C. Neither the name of Image Power, Inc. nor any other contributor + * (including, but not limited to, the University of British Columbia and + * Michael David Adams) may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * D. User agrees that it shall not commence any action against Image Power, + * Inc., the University of British Columbia, Michael David Adams, or any + * other contributors (collectively "Licensors") for infringement of any + * intellectual property rights ("IPR") held by the User in respect of any + * technology that User owns or has a right to license or sublicense and + * which is an element required in order to claim compliance with ISO/IEC + * 15444-1 (i.e., JPEG-2000 Part 1). "IPR" means all intellectual property + * rights worldwide arising under statutory or common law, and whether + * or not perfected, including, without limitation, all (i) patents and + * patent applications owned or licensable by User; (ii) rights associated + * with works of authorship including copyrights, copyright applications, + * copyright registrations, mask work rights, mask work applications, + * mask work registrations; (iii) rights relating to the protection of + * trade secrets and confidential information; (iv) any right analogous + * to those set forth in subsections (i), (ii), or (iii) and any other + * proprietary rights relating to intangible property (other than trademark, + * trade dress, or service mark rights); and (v) divisions, continuations, + * renewals, reissues and extensions of the foregoing (as and to the extent + * applicable) now existing, hereafter filed, issued or acquired. + * + * E. If User commences an infringement action against any Licensor(s) then + * such Licensor(s) shall have the right to terminate User's license and + * all sublicenses that have been granted hereunder by User to other parties. + * + * F. This software is for use only in hardware or software products that + * are compliant with ISO/IEC 15444-1 (i.e., JPEG-2000 Part 1). No license + * or right to this Software is granted for products that do not comply + * with ISO/IEC 15444-1. The JPEG-2000 Part 1 standard can be purchased + * from the ISO. + * + * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. + * NO USE OF THE JASPER SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER + * THIS DISCLAIMER. THE JASPER SOFTWARE IS PROVIDED BY THE LICENSORS AND + * CONTRIBUTORS UNDER THIS LICENSE ON AN ``AS-IS'' BASIS, WITHOUT WARRANTY + * OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, + * WARRANTIES THAT THE JASPER SOFTWARE IS FREE OF DEFECTS, IS MERCHANTABLE, + * IS FIT FOR A PARTICULAR PURPOSE OR IS NON-INFRINGING. THOSE INTENDING + * TO USE THE JASPER SOFTWARE OR MODIFICATIONS THEREOF FOR USE IN HARDWARE + * OR SOFTWARE PRODUCTS ARE ADVISED THAT THEIR USE MAY INFRINGE EXISTING + * PATENTS, COPYRIGHTS, TRADEMARKS, OR OTHER INTELLECTUAL PROPERTY RIGHTS. + * THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE JASPER SOFTWARE + * IS WITH THE USER. SHOULD ANY PART OF THE JASPER SOFTWARE PROVE DEFECTIVE + * IN ANY RESPECT, THE USER (AND NOT THE INITIAL DEVELOPERS, THE UNIVERSITY + * OF BRITISH COLUMBIA, IMAGE POWER, INC., MICHAEL DAVID ADAMS, OR ANY + * OTHER CONTRIBUTOR) SHALL ASSUME THE COST OF ANY NECESSARY SERVICING, + * REPAIR OR CORRECTION. UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, + * WHETHER TORT (INCLUDING NEGLIGENCE), CONTRACT, OR OTHERWISE, SHALL THE + * INITIAL DEVELOPER, THE UNIVERSITY OF BRITISH COLUMBIA, IMAGE POWER, INC., + * MICHAEL DAVID ADAMS, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF THE + * JASPER SOFTWARE, OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE TO + * THE USER OR ANY OTHER PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR + * CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT LIMITATION, + * DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR + * MALFUNCTION, OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR LOSSES, EVEN IF + * SUCH PARTY HAD BEEN INFORMED, OR OUGHT TO HAVE KNOWN, OF THE POSSIBILITY + * OF SUCH DAMAGES. THE JASPER SOFTWARE AND UNDERLYING TECHNOLOGY ARE NOT + * FAULT-TOLERANT AND ARE NOT DESIGNED, MANUFACTURED OR INTENDED FOR USE OR + * RESALE AS ON-LINE CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING + * FAIL-SAFE PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, + * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT + * LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE + * JASPER SOFTWARE OR UNDERLYING TECHNOLOGY OR PRODUCT COULD LEAD DIRECTLY + * TO DEATH, PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE + * ("HIGH RISK ACTIVITIES"). LICENSOR SPECIFICALLY DISCLAIMS ANY EXPRESS + * OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES. USER WILL NOT + * KNOWINGLY USE, DISTRIBUTE OR RESELL THE JASPER SOFTWARE OR UNDERLYING + * TECHNOLOGY OR PRODUCTS FOR HIGH RISK ACTIVITIES AND WILL ENSURE THAT ITS + * CUSTOMERS AND END-USERS OF ITS PRODUCTS ARE PROVIDED WITH A COPY OF THE + * NOTICE SPECIFIED IN THIS SECTION. + * + * __END_OF_JASPER_LICENSE__ + */ + +/* + * Bit Stream Class + * + * $Id$ + */ + +/******************************************************************************\ +* Includes. +\******************************************************************************/ + +#include <assert.h> +#include <stdlib.h> +#include <stdarg.h> + +#include "jasper/jas_malloc.h" +#include "jasper/jas_math.h" +#include "jasper/jas_debug.h" + +#include "jpc_bs.h" + +/******************************************************************************\ +* Code for opening and closing bit streams. +\******************************************************************************/ + +/* Allocate a new bit stream. */ +static jpc_bitstream_t *jpc_bitstream_alloc() +{ + jpc_bitstream_t *bitstream; + + /* Allocate memory for the new bit stream object. */ + if (!(bitstream = jas_malloc(sizeof(jpc_bitstream_t)))) { + return 0; + } + /* Initialize all of the data members. */ + bitstream->stream_ = 0; + bitstream->cnt_ = 0; + bitstream->flags_ = 0; + bitstream->openmode_ = 0; + + return bitstream; +} + +/* Open a bit stream from a stream. */ +jpc_bitstream_t *jpc_bitstream_sopen(jas_stream_t *stream, const char *mode) +{ + jpc_bitstream_t *bitstream; + + /* Ensure that the open mode is valid. */ + assert(!strcmp(mode, "r") || !strcmp(mode, "w") || !strcmp(mode, "r+") + || !strcmp(mode, "w+")); + + if (!(bitstream = jpc_bitstream_alloc())) { + return 0; + } + + /* By default, do not close the underlying (character) stream, upon + the close of the bit stream. */ + bitstream->flags_ = JPC_BITSTREAM_NOCLOSE; + + bitstream->stream_ = stream; + bitstream->openmode_ = (mode[0] == 'w') ? JPC_BITSTREAM_WRITE : + JPC_BITSTREAM_READ; + + /* Mark the data buffer as empty. */ + bitstream->cnt_ = (bitstream->openmode_ == JPC_BITSTREAM_READ) ? 0 : 8; + bitstream->buf_ = 0; + + return bitstream; +} + +/* Close a bit stream. */ +int jpc_bitstream_close(jpc_bitstream_t *bitstream) +{ + int ret = 0; + + /* Align to the next byte boundary while considering the effects of + bit stuffing. */ + if (jpc_bitstream_align(bitstream)) { + ret = -1; + } + + /* If necessary, close the underlying (character) stream. */ + if (!(bitstream->flags_ & JPC_BITSTREAM_NOCLOSE) && bitstream->stream_) { + if (jas_stream_close(bitstream->stream_)) { + ret = -1; + } + bitstream->stream_ = 0; + } + + jas_free(bitstream); + return ret; +} + +/******************************************************************************\ +* Code for reading/writing from/to bit streams. +\******************************************************************************/ + +/* Get a bit from a bit stream. */ +int jpc_bitstream_getbit_func(jpc_bitstream_t *bitstream) +{ + int ret; + JAS_DBGLOG(1000, ("jpc_bitstream_getbit_func(%p)\n", bitstream)); + ret = jpc_bitstream_getbit_macro(bitstream); + JAS_DBGLOG(1000, ("jpc_bitstream_getbit_func -> %d\n", ret)); + return ret; +} + +/* Put a bit to a bit stream. */ +int jpc_bitstream_putbit_func(jpc_bitstream_t *bitstream, int b) +{ + int ret; + JAS_DBGLOG(1000, ("jpc_bitstream_putbit_func(%p, %d)\n", bitstream, b)); + ret = jpc_bitstream_putbit_macro(bitstream, b); + JAS_DBGLOG(1000, ("jpc_bitstream_putbit_func() -> %d\n", ret)); + return ret; +} + +/* Get one or more bits from a bit stream. */ +long jpc_bitstream_getbits(jpc_bitstream_t *bitstream, int n) +{ + long v; + int u; + + /* We can reliably get at most 31 bits since ISO/IEC 9899 only + guarantees that a long can represent values up to 2^31-1. */ + assert(n >= 0 && n < 32); + + /* Get the number of bits requested from the specified bit stream. */ + v = 0; + while (--n >= 0) { + if ((u = jpc_bitstream_getbit(bitstream)) < 0) { + return -1; + } + v = (v << 1) | u; + } + return v; +} + +/* Put one or more bits to a bit stream. */ +int jpc_bitstream_putbits(jpc_bitstream_t *bitstream, int n, long v) +{ + int m; + + /* We can reliably put at most 31 bits since ISO/IEC 9899 only + guarantees that a long can represent values up to 2^31-1. */ + assert(n >= 0 && n < 32); + /* Ensure that only the bits to be output are nonzero. */ + assert(!(v & (~JAS_ONES(n)))); + + /* Put the desired number of bits to the specified bit stream. */ + m = n - 1; + while (--n >= 0) { + if (jpc_bitstream_putbit(bitstream, (v >> m) & 1) == EOF) { + return EOF; + } + v <<= 1; + } + return 0; +} + +/******************************************************************************\ +* Code for buffer filling and flushing. +\******************************************************************************/ + +/* Fill the buffer for a bit stream. */ +int jpc_bitstream_fillbuf(jpc_bitstream_t *bitstream) +{ + int c; + /* Note: The count has already been decremented by the caller. */ + assert(bitstream->openmode_ & JPC_BITSTREAM_READ); + assert(bitstream->cnt_ <= 0); + + if (bitstream->flags_ & JPC_BITSTREAM_ERR) { + bitstream->cnt_ = 0; + return -1; + } + + if (bitstream->flags_ & JPC_BITSTREAM_EOF) { + bitstream->buf_ = 0x7f; + bitstream->cnt_ = 7; + return 1; + } + + bitstream->buf_ = (bitstream->buf_ << 8) & 0xffff; + if ((c = jas_stream_getc((bitstream)->stream_)) == EOF) { + bitstream->flags_ |= JPC_BITSTREAM_EOF; + return 1; + } + bitstream->cnt_ = (bitstream->buf_ == 0xff00) ? 6 : 7; + bitstream->buf_ |= c & ((1 << (bitstream->cnt_ + 1)) - 1); + return (bitstream->buf_ >> bitstream->cnt_) & 1; +} + + +/******************************************************************************\ +* Code related to flushing. +\******************************************************************************/ + +/* Does the bit stream need to be aligned to a byte boundary (considering + the effects of bit stuffing)? */ +int jpc_bitstream_needalign(jpc_bitstream_t *bitstream) +{ + if (bitstream->openmode_ & JPC_BITSTREAM_READ) { + /* The bit stream is open for reading. */ + /* If there are any bits buffered for reading, or the + previous byte forced a stuffed bit, alignment is + required. */ + if ((bitstream->cnt_ < 8 && bitstream->cnt_ > 0) || + ((bitstream->buf_ >> 8) & 0xff) == 0xff) { + return 1; + } + } else if (bitstream->openmode_ & JPC_BITSTREAM_WRITE) { + /* The bit stream is open for writing. */ + /* If there are any bits buffered for writing, or the + previous byte forced a stuffed bit, alignment is + required. */ + if ((bitstream->cnt_ < 8 && bitstream->cnt_ >= 0) || + ((bitstream->buf_ >> 8) & 0xff) == 0xff) { + return 1; + } + } else { + /* This should not happen. Famous last words, eh? :-) */ + assert(0); + return -1; + } + return 0; +} + +/* How many additional bytes would be output if we align the bit stream? */ +int jpc_bitstream_pending(jpc_bitstream_t *bitstream) +{ + if (bitstream->openmode_ & JPC_BITSTREAM_WRITE) { + /* The bit stream is being used for writing. */ +#if 1 + /* XXX - Is this really correct? Check someday... */ + if (bitstream->cnt_ < 8) { + return 1; + } +#else + if (bitstream->cnt_ < 8) { + if (((bitstream->buf_ >> 8) & 0xff) == 0xff) { + return 2; + } + return 1; + } +#endif + return 0; + } else { + /* This operation should not be invoked on a bit stream that + is being used for reading. */ + return -1; + } +} + +/* Align the bit stream to a byte boundary. */ +int jpc_bitstream_align(jpc_bitstream_t *bitstream) +{ + int ret; + if (bitstream->openmode_ & JPC_BITSTREAM_READ) { + ret = jpc_bitstream_inalign(bitstream, 0, 0); + } else if (bitstream->openmode_ & JPC_BITSTREAM_WRITE) { + ret = jpc_bitstream_outalign(bitstream, 0); + } + return ret; +} + +/* Align a bit stream in the input case. */ +int jpc_bitstream_inalign(jpc_bitstream_t *bitstream, int fillmask, + int filldata) +{ + int n; + int v; + int u; + int numfill; + int m; + + numfill = 7; + m = 0; + v = 0; + if (bitstream->cnt_ > 0) { + n = bitstream->cnt_; + } else if (!bitstream->cnt_) { + n = ((bitstream->buf_ & 0xff) == 0xff) ? 7 : 0; + } else { + n = 0; + } + if (n > 0) { + if ((u = jpc_bitstream_getbits(bitstream, n)) < 0) { + return -1; + } + m += n; + v = (v << n) | u; + } + if ((bitstream->buf_ & 0xff) == 0xff) { + if ((u = jpc_bitstream_getbits(bitstream, 7)) < 0) { + return -1; + } + v = (v << 7) | u; + m += 7; + } + if (m > numfill) { + v >>= m - numfill; + } else { + filldata >>= numfill - m; + fillmask >>= numfill - m; + } + if (((~(v ^ filldata)) & fillmask) != fillmask) { + /* The actual fill pattern does not match the expected one. */ + return 1; + } + + return 0; +} + +/* Align a bit stream in the output case. */ +int jpc_bitstream_outalign(jpc_bitstream_t *bitstream, int filldata) +{ + int n; + int v; + + /* Ensure that this bit stream is open for writing. */ + assert(bitstream->openmode_ & JPC_BITSTREAM_WRITE); + + /* Ensure that the first bit of fill data is zero. */ + /* Note: The first bit of fill data must be zero. If this were not + the case, the fill data itself could cause further bit stuffing to + be required (which would cause numerous complications). */ + assert(!(filldata & (~0x3f))); + + if (!bitstream->cnt_) { + if ((bitstream->buf_ & 0xff) == 0xff) { + n = 7; + v = filldata; + } else { + n = 0; + v = 0; + } + } else if (bitstream->cnt_ > 0 && bitstream->cnt_ < 8) { + n = bitstream->cnt_; + v = filldata >> (7 - n); + } else { + n = 0; + v = 0; + return 0; + } + + /* Write the appropriate fill data to the bit stream. */ + if (n > 0) { + if (jpc_bitstream_putbits(bitstream, n, v)) { + return -1; + } + } + if (bitstream->cnt_ < 8) { + assert(bitstream->cnt_ >= 0 && bitstream->cnt_ < 8); + assert((bitstream->buf_ & 0xff) != 0xff); + /* Force the pending byte of output to be written to the + underlying (character) stream. */ + if (jas_stream_putc(bitstream->stream_, bitstream->buf_ & 0xff) == EOF) { + return -1; + } + bitstream->cnt_ = 8; + bitstream->buf_ = (bitstream->buf_ << 8) & 0xffff; + } + + return 0; +} |