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1 vero 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 #ifndef __T1_H
32 #define __T1_H
33 /**
34 @file t1.h
35 @brief Implementation of the tier-1 coding (coding of code-block coefficients) (T1)
36  
37 The functions in T1.C have for goal to realize the tier-1 coding operation. The functions
38 in T1.C are used by some function in TCD.C.
39 */
40  
41 /** @defgroup T1 T1 - Implementation of the tier-1 coding */
42 /*@{*/
43  
44 /* ----------------------------------------------------------------------- */
45 #define T1_NMSEDEC_BITS 7
46  
47 #define T1_SIG_NE 0x0001 /**< Context orientation : North-East direction */
48 #define T1_SIG_SE 0x0002 /**< Context orientation : South-East direction */
49 #define T1_SIG_SW 0x0004 /**< Context orientation : South-West direction */
50 #define T1_SIG_NW 0x0008 /**< Context orientation : North-West direction */
51 #define T1_SIG_N 0x0010 /**< Context orientation : North direction */
52 #define T1_SIG_E 0x0020 /**< Context orientation : East direction */
53 #define T1_SIG_S 0x0040 /**< Context orientation : South direction */
54 #define T1_SIG_W 0x0080 /**< Context orientation : West direction */
55 #define T1_SIG_OTH (T1_SIG_N|T1_SIG_NE|T1_SIG_E|T1_SIG_SE|T1_SIG_S|T1_SIG_SW|T1_SIG_W|T1_SIG_NW)
56 #define T1_SIG_PRIM (T1_SIG_N|T1_SIG_E|T1_SIG_S|T1_SIG_W)
57  
58 #define T1_SGN_N 0x0100
59 #define T1_SGN_E 0x0200
60 #define T1_SGN_S 0x0400
61 #define T1_SGN_W 0x0800
62 #define T1_SGN (T1_SGN_N|T1_SGN_E|T1_SGN_S|T1_SGN_W)
63  
64 #define T1_SIG 0x1000
65 #define T1_REFINE 0x2000
66 #define T1_VISIT 0x4000
67  
68 #define T1_NUMCTXS_ZC 9
69 #define T1_NUMCTXS_SC 5
70 #define T1_NUMCTXS_MAG 3
71 #define T1_NUMCTXS_AGG 1
72 #define T1_NUMCTXS_UNI 1
73  
74 #define T1_CTXNO_ZC 0
75 #define T1_CTXNO_SC (T1_CTXNO_ZC+T1_NUMCTXS_ZC)
76 #define T1_CTXNO_MAG (T1_CTXNO_SC+T1_NUMCTXS_SC)
77 #define T1_CTXNO_AGG (T1_CTXNO_MAG+T1_NUMCTXS_MAG)
78 #define T1_CTXNO_UNI (T1_CTXNO_AGG+T1_NUMCTXS_AGG)
79 #define T1_NUMCTXS (T1_CTXNO_UNI+T1_NUMCTXS_UNI)
80  
81 #define T1_NMSEDEC_FRACBITS (T1_NMSEDEC_BITS-1)
82  
83 #define T1_TYPE_MQ 0 /**< Normal coding using entropy coder */
84 #define T1_TYPE_RAW 1 /**< No encoding the information is store under raw format in codestream (mode switch RAW)*/
85  
86 /* ----------------------------------------------------------------------- */
87  
88 typedef short flag_t;
89  
90 /**
91 Tier-1 coding (coding of code-block coefficients)
92 */
93 typedef struct opj_t1 {
94 /** codec context */
95 opj_common_ptr cinfo;
96  
97 /** MQC component */
98 opj_mqc_t *mqc;
99 /** RAW component */
100 opj_raw_t *raw;
101  
102 int *data;
103 flag_t *flags;
104 int w;
105 int h;
106 int datasize;
107 int flagssize;
108 int flags_stride;
109 } opj_t1_t;
110  
111 #define MACRO_t1_flags(x,y) t1->flags[((x)*(t1->flags_stride))+(y)]
112  
113 /** @name Exported functions */
114 /*@{*/
115 /* ----------------------------------------------------------------------- */
116 /**
117 Create a new T1 handle
118 and initialize the look-up tables of the Tier-1 coder/decoder
119 @return Returns a new T1 handle if successful, returns NULL otherwise
120 @see t1_init_luts
121 */
122 opj_t1_t* t1_create(opj_common_ptr cinfo);
123 /**
124 Destroy a previously created T1 handle
125 @param t1 T1 handle to destroy
126 */
127 void t1_destroy(opj_t1_t *t1);
128 /**
129 Encode the code-blocks of a tile
130 @param t1 T1 handle
131 @param tile The tile to encode
132 @param tcp Tile coding parameters
133 */
134 void t1_encode_cblks(opj_t1_t *t1, opj_tcd_tile_t *tile, opj_tcp_t *tcp);
135 /**
136 Decode the code-blocks of a tile
137 @param t1 T1 handle
138 @param tilec The tile to decode
139 @param tccp Tile coding parameters
140 */
141 void t1_decode_cblks(opj_t1_t* t1, opj_tcd_tilecomp_t* tilec, opj_tccp_t* tccp);
142 /* ----------------------------------------------------------------------- */
143 /*@}*/
144  
145 /*@}*/
146  
147 #endif /* __T1_H */