aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/libraries/openjpeg-libsl/libopenjpeg/pi.h
blob: fc993297acb2b78c4fac4a152f280621225131b2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/*
 * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
 * Copyright (c) 2002-2007, Professor Benoit Macq
 * Copyright (c) 2001-2003, David Janssens
 * Copyright (c) 2002-2003, Yannick Verschueren
 * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
 * Copyright (c) 2005, Herve Drolon, FreeImage Team
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __PI_H
#define __PI_H
/**
@file pi.h
@brief Implementation of a packet iterator (PI)

The functions in PI.C have for goal to realize a packet iterator that permits to get the next
packet following the progression order and change of it. The functions in PI.C are used
by some function in T2.C.
*/

/** @defgroup PI PI - Implementation of a packet iterator */
/*@{*/

/**
FIXME: documentation
*/
typedef struct opj_pi_resolution {
  int pdx, pdy;
  int pw, ph;
} opj_pi_resolution_t;

/**
FIXME: documentation
*/
typedef struct opj_pi_comp {
  int dx, dy;
  /** number of resolution levels */
  int numresolutions;
  opj_pi_resolution_t *resolutions;
} opj_pi_comp_t;

/** 
Packet iterator 
*/
typedef struct opj_pi_iterator {
	/** Enabling Tile part generation*/
	char tp_on;
	/** precise if the packet has been already used (usefull for progression order change) */
	short int *include;
	/** layer step used to localize the packet in the include vector */
	int step_l;
	/** resolution step used to localize the packet in the include vector */
	int step_r;	
	/** component step used to localize the packet in the include vector */
	int step_c;	
	/** precinct step used to localize the packet in the include vector */
	int step_p;	
	/** component that identify the packet */
	int compno;
	/** resolution that identify the packet */
	int resno;
	/** precinct that identify the packet */
	int precno;
	/** layer that identify the packet */
	int layno;   
	/** 0 if the first packet */
	int first;
	/** progression order change information */
	opj_poc_t poc;
	/** number of components in the image */
	int numcomps;
	/** Components*/
	opj_pi_comp_t *comps;
	int tx0, ty0, tx1, ty1;
	int x, y, dx, dy;
} opj_pi_iterator_t;

/** @name Exported functions */
/*@{*/
/* ----------------------------------------------------------------------- */
/**
Create a packet iterator for Encoder
@param image Raw image for which the packets will be listed
@param cp Coding parameters
@param tileno Number that identifies the tile for which to list the packets
@param t2_mode If == 0 In Threshold calculation ,If == 1 Final pass
@return Returns a packet iterator that points to the first packet of the tile
@see pi_destroy
*/
opj_pi_iterator_t *pi_initialise_encode(opj_image_t *image, opj_cp_t *cp, int tileno,J2K_T2_MODE t2_mode);
/**
Modify the packet iterator for enabling tile part generation
@param pi Handle to the packet iterator generated in pi_initialise_encode  
@param cp Coding parameters
@param tileno Number that identifies the tile for which to list the packets
@param tpnum Tile part number of the current tile
@param tppos The position of the tile part flag in the progression order
*/
void pi_create_encode( opj_pi_iterator_t *pi, opj_cp_t *cp,int tileno, int pino,int tpnum, int tppos);
/**
Create a packet iterator for Decoder
@param image Raw image for which the packets will be listed
@param cp Coding parameters
@param tileno Number that identifies the tile for which to list the packets
@return Returns a packet iterator that points to the first packet of the tile
@see pi_destroy
*/
opj_pi_iterator_t *pi_create_decode(opj_image_t * image, opj_cp_t * cp, int tileno);

/**
Destroy a packet iterator
@param pi Previously created packet iterator
@param cp Coding parameters
@param tileno Number that identifies the tile for which the packets were listed
@see pi_create
*/
void pi_destroy(opj_pi_iterator_t *pi, opj_cp_t *cp, int tileno);

/**
Modify the packet iterator to point to the next packet
@param pi Packet iterator to modify
@return Returns false if pi pointed to the last packet or else returns true 
*/
bool pi_next(opj_pi_iterator_t * pi);
/* ----------------------------------------------------------------------- */
/*@}*/

/*@}*/

#endif /* __PI_H */