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 * Copyright (c) 2008, Jerome Fimes, Communications & Systemes <jerome.fimes@c-s.fr>
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12 * modification, are permitted provided that the following conditions
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36 @brief Implementation of the tier-1 coding (coding of code-block coefficients) (T1)
38 The functions in T1.C have for goal to realize the tier-1 coding operation. The functions
39 in T1.C are used by some function in TCD.C.
42 /** @defgroup T1 T1 - Implementation of the tier-1 coding */
45 /* ----------------------------------------------------------------------- */
46 #define T1_NMSEDEC_BITS 7
48 #define T1_SIG_NE 0x0001 /**< Context orientation : North-East direction */
49 #define T1_SIG_SE 0x0002 /**< Context orientation : South-East direction */
50 #define T1_SIG_SW 0x0004 /**< Context orientation : South-West direction */
51 #define T1_SIG_NW 0x0008 /**< Context orientation : North-West direction */
52 #define T1_SIG_N 0x0010 /**< Context orientation : North direction */
53 #define T1_SIG_E 0x0020 /**< Context orientation : East direction */
54 #define T1_SIG_S 0x0040 /**< Context orientation : South direction */
55 #define T1_SIG_W 0x0080 /**< Context orientation : West direction */
56 #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)
57 #define T1_SIG_PRIM (T1_SIG_N|T1_SIG_E|T1_SIG_S|T1_SIG_W)
59 #define T1_SGN_N 0x0100
60 #define T1_SGN_E 0x0200
61 #define T1_SGN_S 0x0400
62 #define T1_SGN_W 0x0800
63 #define T1_SGN (T1_SGN_N|T1_SGN_E|T1_SGN_S|T1_SGN_W)
66 #define T1_REFINE 0x2000
67 #define T1_VISIT 0x4000
69 #define T1_NUMCTXS_ZC 9
70 #define T1_NUMCTXS_SC 5
71 #define T1_NUMCTXS_MAG 3
72 #define T1_NUMCTXS_AGG 1
73 #define T1_NUMCTXS_UNI 1
76 #define T1_CTXNO_SC (T1_CTXNO_ZC+T1_NUMCTXS_ZC)
77 #define T1_CTXNO_MAG (T1_CTXNO_SC+T1_NUMCTXS_SC)
78 #define T1_CTXNO_AGG (T1_CTXNO_MAG+T1_NUMCTXS_MAG)
79 #define T1_CTXNO_UNI (T1_CTXNO_AGG+T1_NUMCTXS_AGG)
80 #define T1_NUMCTXS (T1_CTXNO_UNI+T1_NUMCTXS_UNI)
82 #define T1_NMSEDEC_FRACBITS (T1_NMSEDEC_BITS-1)
84 #define T1_TYPE_MQ 0 /**< Normal coding using entropy coder */
85 #define T1_TYPE_RAW 1 /**< No encoding the information is store under raw format in codestream (mode switch RAW)*/
87 /* ----------------------------------------------------------------------- */
88 struct opj_common_struct;
91 struct opj_tcd_tilecomp;
100 Tier-1 coding (coding of code-block coefficients)
102 typedef struct opj_t1 {
113 OPJ_UINT32 flagssize;
114 OPJ_UINT32 flags_stride;
117 #define MACRO_t1_flags(x,y) t1->flags[((x)*(t1->flags_stride))+(y)]
119 /** @name Exported functions */
121 /* ----------------------------------------------------------------------- */
124 * Creates a new Tier 1 handle
125 * and initializes the look-up tables of the Tier-1 coder/decoder
126 * @return a new T1 handle if successful, returns NULL otherwise
128 opj_t1_t* t1_create();
131 * Destroys a previously created T1 handle
133 * @param p_t1 Tier 1 handle to destroy
135 void t1_destroy(opj_t1_t *p_t1);
138 Encode the code-blocks of a tile
140 @param tile The tile to encode
141 @param tcp Tile coding parameters
143 bool t1_encode_cblks(opj_t1_t *t1, struct opj_tcd_tile *tile, struct opj_tcp *tcp,const OPJ_FLOAT64 * mct_norms);
145 Decode the code-blocks of a tile
147 @param tile The tile to decode
148 @param tcp Tile coding parameters
150 void t1_decode_cblks(opj_t1_t* t1, struct opj_tcd_tilecomp* tilec, struct opj_tccp* tccp);
151 /* ----------------------------------------------------------------------- */