diff options
Diffstat (limited to 'src/3rdparty/jasper/src/libjasper/jpc/jpc_bs.c')
| -rw-r--r-- | src/3rdparty/jasper/src/libjasper/jpc/jpc_bs.c | 440 |
1 files changed, 0 insertions, 440 deletions
diff --git a/src/3rdparty/jasper/src/libjasper/jpc/jpc_bs.c b/src/3rdparty/jasper/src/libjasper/jpc/jpc_bs.c deleted file mode 100644 index fb56398..0000000 --- a/src/3rdparty/jasper/src/libjasper/jpc/jpc_bs.c +++ /dev/null @@ -1,440 +0,0 @@ -/* - * Copyright (c) 1999-2000, Image Power, Inc. and the University of - * British Columbia. - * 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__ - */ - -/* - * 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" - -/******************************************************************************\ -* Local function prototypes. -\******************************************************************************/ - -static jpc_bitstream_t *jpc_bitstream_alloc(void); - -/******************************************************************************\ -* Code for opening and closing bit streams. -\******************************************************************************/ - -/* Open a bit stream from a stream. */ -jpc_bitstream_t *jpc_bitstream_sopen(jas_stream_t *stream, char *mode) -{ - jpc_bitstream_t *bitstream; - - /* Ensure that the open mode is valid. */ -#if 1 -/* This causes a string literal too long error (with c99 pedantic mode). */ - assert(!strcmp(mode, "r") || !strcmp(mode, "w") || !strcmp(mode, "r+") - || !strcmp(mode, "w+")); -#endif - - 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; -} - -/* 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; -} - -/******************************************************************************\ -* 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); - } else { - abort(); - } - 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; -} |