--- /dev/null
+/*
+ * 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
projects / opencv / blobdiff