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;
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 
opj_free
#define opj_free(m)
Deallocates or frees a memory block.
Definition: opj_malloc.h:152
bio_putbit
static void bio_putbit(opj_bio_t *bio, int b)
Write a bit.
Definition: bio.c:95
opj_malloc
#define opj_malloc(size)
Allocate an uninitialized memory block.
Definition: opj_malloc.h:51
bio_inalign
int bio_inalign(opj_bio_t *bio)
Passes the ending bits (coming from flushing)
Definition: bio.c:178
bio_numbytes
int bio_numbytes(opj_bio_t *bio)
Number of bytes written.
Definition: bio.c:128
bio_byteout
static int bio_byteout(opj_bio_t *bio)
Write a byte.
Definition: bio.c:75
bio_create
opj_bio_t * bio_create(void)
Create a new BIO handle.
Definition: bio.c:117
opj_bio::buf
unsigned int buf
temporary place where each byte is read or written
Definition: bio.h:55
opj_bio::end
unsigned char * end
pointer to the end of the buffer
Definition: bio.h:51
bio_destroy
void bio_destroy(opj_bio_t *bio)
Destroy a previously created BIO handle.
Definition: bio.c:122
bio_read
int bio_read(opj_bio_t *bio, int n)
Read bits.
Definition: bio.c:155
opj_bio::ct
int ct
coder : number of bits free to write.
Definition: bio.h:57
bio_create
opj_bio_t * bio_create(void)
Create a new BIO handle.
Definition: bio.c:117
opj_includes.h
opj_bio
Individual bit input-output stream (BIO)
Definition: bio.h:47
bio_inalign
int bio_inalign(opj_bio_t *bio)
Passes the ending bits (coming from flushing)
Definition: bio.c:178
bio_write
void bio_write(opj_bio_t *bio, int v, int n)
Write bits.
Definition: bio.c:148
bio_bytein
static int bio_bytein(opj_bio_t *bio)
Read a byte.
Definition: bio.c:85
bio_init_enc
void bio_init_enc(opj_bio_t *bio, unsigned char *bp, int len)
Init encoder.
Definition: bio.c:132
opj_bio::start
unsigned char * start
pointer to the start of the buffer
Definition: bio.h:49
bio_numbytes
int bio_numbytes(opj_bio_t *bio)
Number of bytes written.
Definition: bio.c:128
opj_bio::bp
unsigned char * bp
pointer to the present position in the buffer
Definition: bio.h:53
bio_init_dec
void bio_init_dec(opj_bio_t *bio, unsigned char *bp, int len)
Init decoder.
Definition: bio.c:140
bio_init_enc
void bio_init_enc(opj_bio_t *bio, unsigned char *bp, int len)
Init encoder.
Definition: bio.c:132
bio_destroy
void bio_destroy(opj_bio_t *bio)
Destroy a previously created BIO handle.
Definition: bio.c:122
bio_read
int bio_read(opj_bio_t *bio, int n)
Read bits.
Definition: bio.c:155
bio_write
void bio_write(opj_bio_t *bio, int v, int n)
Write bits.
Definition: bio.c:148
bio_getbit
static int bio_getbit(opj_bio_t *bio)
Read a bit.
Definition: bio.c:103
opj_bio_t
struct opj_bio opj_bio_t
Individual bit input-output stream (BIO)
bio_init_dec
void bio_init_dec(opj_bio_t *bio, unsigned char *bp, int len)
Init decoder.
Definition: bio.c:140
bio_flush
int bio_flush(opj_bio_t *bio)
Flush bits.
Definition: bio.c:164
bio_flush
int bio_flush(opj_bio_t *bio)
Flush bits.
Definition: bio.c:164