OpenJPEG  1.5.1
bio.h
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1 /*
2  * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
3  * Copyright (c) 2002-2007, Professor Benoit Macq
4  * Copyright (c) 2001-2003, David Janssens
5  * Copyright (c) 2002-2003, Yannick Verschueren
6  * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
7  * Copyright (c) 2005, Herve Drolon, FreeImage Team
8  * All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  * notice, this list of conditions and the following disclaimer in the
17  * documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 #ifndef __BIO_H
33 #define __BIO_H
34 
43 
47 typedef struct opj_bio {
49  unsigned char *start;
51  unsigned char *end;
53  unsigned char *bp;
55  unsigned int buf;
57  int ct;
58 } opj_bio_t;
59 
62 /* ----------------------------------------------------------------------- */
67 opj_bio_t* bio_create(void);
72 void bio_destroy(opj_bio_t *bio);
78 int bio_numbytes(opj_bio_t *bio);
85 void bio_init_enc(opj_bio_t *bio, unsigned char *bp, int len);
92 void bio_init_dec(opj_bio_t *bio, unsigned char *bp, int len);
99 void bio_write(opj_bio_t *bio, int v, int n);
106 int bio_read(opj_bio_t *bio, int n);
112 int bio_flush(opj_bio_t *bio);
118 int bio_inalign(opj_bio_t *bio);
119 /* ----------------------------------------------------------------------- */
123 
124 #endif /* __BIO_H */
125 
int bio_read(opj_bio_t *bio, int n)
Read bits.
Definition: bio.c:155
unsigned char * start
pointer to the start of the buffer
Definition: bio.h:49
int bio_flush(opj_bio_t *bio)
Flush bits.
Definition: bio.c:164
void bio_destroy(opj_bio_t *bio)
Destroy a previously created BIO handle.
Definition: bio.c:122
void bio_init_dec(opj_bio_t *bio, unsigned char *bp, int len)
Init decoder.
Definition: bio.c:140
Individual bit input-output stream (BIO)
Definition: bio.h:47
int bio_numbytes(opj_bio_t *bio)
Number of bytes written.
Definition: bio.c:128
struct opj_bio opj_bio_t
Individual bit input-output stream (BIO)
unsigned int buf
temporary place where each byte is read or written
Definition: bio.h:55
int bio_inalign(opj_bio_t *bio)
Passes the ending bits (coming from flushing)
Definition: bio.c:178
unsigned char * end
pointer to the end of the buffer
Definition: bio.h:51
unsigned char * bp
pointer to the present position in the buffer
Definition: bio.h:53
opj_bio_t * bio_create(void)
Create a new BIO handle.
Definition: bio.c:117
void bio_write(opj_bio_t *bio, int v, int n)
Write bits.
Definition: bio.c:148
int ct
coder : number of bits free to write.
Definition: bio.h:57
void bio_init_enc(opj_bio_t *bio, unsigned char *bp, int len)
Init encoder.
Definition: bio.c:132