mirror of https://github.com/opencv/opencv.git
Open Source Computer Vision Library
https://opencv.org/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
231 lines
8.6 KiB
231 lines
8.6 KiB
/* |
|
* 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 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: jpc_bs.h,v 1.2 2008-05-26 09:40:52 vp153 Exp $ |
|
*/ |
|
|
|
#ifndef JPC_BS_H |
|
#define JPC_BS_H |
|
|
|
/******************************************************************************\ |
|
* Includes. |
|
\******************************************************************************/ |
|
|
|
#include <stdio.h> |
|
|
|
#include "jasper/jas_types.h" |
|
#include "jasper/jas_stream.h" |
|
|
|
/******************************************************************************\ |
|
* Constants. |
|
\******************************************************************************/ |
|
|
|
/* |
|
* Bit stream open mode flags. |
|
*/ |
|
|
|
/* Bit stream open for reading. */ |
|
#define JPC_BITSTREAM_READ 0x01 |
|
/* Bit stream open for writing. */ |
|
#define JPC_BITSTREAM_WRITE 0x02 |
|
|
|
/* |
|
* Bit stream flags. |
|
*/ |
|
|
|
/* Do not close underlying character stream. */ |
|
#define JPC_BITSTREAM_NOCLOSE 0x01 |
|
/* End of file has been reached while reading. */ |
|
#define JPC_BITSTREAM_EOF 0x02 |
|
/* An I/O error has occured. */ |
|
#define JPC_BITSTREAM_ERR 0x04 |
|
|
|
/******************************************************************************\ |
|
* Types. |
|
\******************************************************************************/ |
|
|
|
/* Bit stream class. */ |
|
|
|
typedef struct { |
|
|
|
/* Some miscellaneous flags. */ |
|
int flags_; |
|
|
|
/* The input/output buffer. */ |
|
uint_fast16_t buf_; |
|
|
|
/* The number of bits remaining in the byte being read/written. */ |
|
int cnt_; |
|
|
|
/* The underlying stream associated with this bit stream. */ |
|
jas_stream_t *stream_; |
|
|
|
/* The mode in which this bit stream was opened. */ |
|
int openmode_; |
|
|
|
} jpc_bitstream_t; |
|
|
|
/******************************************************************************\ |
|
* Functions/macros for opening and closing bit streams.. |
|
\******************************************************************************/ |
|
|
|
/* Open a stream as a bit stream. */ |
|
jpc_bitstream_t *jpc_bitstream_sopen(jas_stream_t *stream, char *mode); |
|
|
|
/* Close a bit stream. */ |
|
int jpc_bitstream_close(jpc_bitstream_t *bitstream); |
|
|
|
/******************************************************************************\ |
|
* Functions/macros for reading from and writing to bit streams.. |
|
\******************************************************************************/ |
|
|
|
/* Read a bit from a bit stream. */ |
|
#if defined(DEBUG) |
|
#define jpc_bitstream_getbit(bitstream) \ |
|
jpc_bitstream_getbit_func(bitstream) |
|
#else |
|
#define jpc_bitstream_getbit(bitstream) \ |
|
jpc_bitstream_getbit_macro(bitstream) |
|
#endif |
|
|
|
/* Write a bit to a bit stream. */ |
|
#if defined(DEBUG) |
|
#define jpc_bitstream_putbit(bitstream, v) \ |
|
jpc_bitstream_putbit_func(bitstream, v) |
|
#else |
|
#define jpc_bitstream_putbit(bitstream, v) \ |
|
jpc_bitstream_putbit_macro(bitstream, v) |
|
#endif |
|
|
|
/* Read one or more bits from a bit stream. */ |
|
long jpc_bitstream_getbits(jpc_bitstream_t *bitstream, int n); |
|
|
|
/* Write one or more bits to a bit stream. */ |
|
int jpc_bitstream_putbits(jpc_bitstream_t *bitstream, int n, long v); |
|
|
|
/******************************************************************************\ |
|
* Functions/macros for flushing and aligning bit streams. |
|
\******************************************************************************/ |
|
|
|
/* Align the current position within the bit stream to the next byte |
|
boundary. */ |
|
int jpc_bitstream_align(jpc_bitstream_t *bitstream); |
|
|
|
/* Align the current position in the bit stream with the next byte boundary, |
|
ensuring that certain bits consumed in the process match a particular |
|
pattern. */ |
|
int jpc_bitstream_inalign(jpc_bitstream_t *bitstream, int fillmask, |
|
int filldata); |
|
|
|
/* Align the current position in the bit stream with the next byte boundary, |
|
writing bits from the specified pattern (if necessary) in the process. */ |
|
int jpc_bitstream_outalign(jpc_bitstream_t *bitstream, int filldata); |
|
|
|
/* Check if a bit stream needs alignment. */ |
|
int jpc_bitstream_needalign(jpc_bitstream_t *bitstream); |
|
|
|
/* How many additional bytes would be output if the bit stream was aligned? */ |
|
int jpc_bitstream_pending(jpc_bitstream_t *bitstream); |
|
|
|
/******************************************************************************\ |
|
* Functions/macros for querying state information for bit streams. |
|
\******************************************************************************/ |
|
|
|
/* Has EOF been encountered on a bit stream? */ |
|
#define jpc_bitstream_eof(bitstream) \ |
|
((bitstream)->flags_ & JPC_BITSTREAM_EOF) |
|
|
|
/******************************************************************************\ |
|
* Internals. |
|
\******************************************************************************/ |
|
|
|
/* DO NOT DIRECTLY INVOKE ANY OF THE MACROS OR FUNCTIONS BELOW. THEY ARE |
|
FOR INTERNAL USE ONLY. */ |
|
|
|
int jpc_bitstream_getbit_func(jpc_bitstream_t *bitstream); |
|
|
|
int jpc_bitstream_putbit_func(jpc_bitstream_t *bitstream, int v); |
|
|
|
int jpc_bitstream_fillbuf(jpc_bitstream_t *bitstream); |
|
|
|
#define jpc_bitstream_getbit_macro(bitstream) \ |
|
(assert((bitstream)->openmode_ & JPC_BITSTREAM_READ), \ |
|
(--(bitstream)->cnt_ >= 0) ? \ |
|
((int)(((bitstream)->buf_ >> (bitstream)->cnt_) & 1)) : \ |
|
jpc_bitstream_fillbuf(bitstream)) |
|
|
|
#define jpc_bitstream_putbit_macro(bitstream, bit) \ |
|
(assert((bitstream)->openmode_ & JPC_BITSTREAM_WRITE), \ |
|
(--(bitstream)->cnt_ < 0) ? \ |
|
((bitstream)->buf_ = ((bitstream)->buf_ << 8) & 0xffff, \ |
|
(bitstream)->cnt_ = ((bitstream)->buf_ == 0xff00) ? 6 : 7, \ |
|
(bitstream)->buf_ |= ((bit) & 1) << (bitstream)->cnt_, \ |
|
(jas_stream_putc((bitstream)->stream_, (bitstream)->buf_ >> 8) == EOF) \ |
|
? (EOF) : ((bit) & 1)) : \ |
|
((bitstream)->buf_ |= ((bit) & 1) << (bitstream)->cnt_, \ |
|
(bit) & 1)) |
|
|
|
#endif
|
|
|