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41 @brief Implementation of the tier-1 coding (coding of code-block coefficients) (T1)
43 The functions in T1.C have for goal to realize the tier-1 coding operation. The functions
44 in T1.C are used by some function in TCD.C.
47 /** @defgroup T1 T1 - Implementation of the tier-1 coding */
50 /* ----------------------------------------------------------------------- */
51 #define T1_NMSEDEC_BITS 7
53 #define T1_SIG_NE 0x0001 /**< Context orientation : North-East direction */
54 #define T1_SIG_SE 0x0002 /**< Context orientation : South-East direction */
55 #define T1_SIG_SW 0x0004 /**< Context orientation : South-West direction */
56 #define T1_SIG_NW 0x0008 /**< Context orientation : North-West direction */
57 #define T1_SIG_N 0x0010 /**< Context orientation : North direction */
58 #define T1_SIG_E 0x0020 /**< Context orientation : East direction */
59 #define T1_SIG_S 0x0040 /**< Context orientation : South direction */
60 #define T1_SIG_W 0x0080 /**< Context orientation : West direction */
61 #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)
62 #define T1_SIG_PRIM (T1_SIG_N|T1_SIG_E|T1_SIG_S|T1_SIG_W)
64 #define T1_SGN_N 0x0100
65 #define T1_SGN_E 0x0200
66 #define T1_SGN_S 0x0400
67 #define T1_SGN_W 0x0800
68 #define T1_SGN (T1_SGN_N|T1_SGN_E|T1_SGN_S|T1_SGN_W)
71 #define T1_REFINE 0x2000
72 #define T1_VISIT 0x4000
74 #define T1_NUMCTXS_ZC 9
75 #define T1_NUMCTXS_SC 5
76 #define T1_NUMCTXS_MAG 3
77 #define T1_NUMCTXS_AGG 1
78 #define T1_NUMCTXS_UNI 1
81 #define T1_CTXNO_SC (T1_CTXNO_ZC+T1_NUMCTXS_ZC)
82 #define T1_CTXNO_MAG (T1_CTXNO_SC+T1_NUMCTXS_SC)
83 #define T1_CTXNO_AGG (T1_CTXNO_MAG+T1_NUMCTXS_MAG)
84 #define T1_CTXNO_UNI (T1_CTXNO_AGG+T1_NUMCTXS_AGG)
85 #define T1_NUMCTXS (T1_CTXNO_UNI+T1_NUMCTXS_UNI)
87 #define T1_NMSEDEC_FRACBITS (T1_NMSEDEC_BITS-1)
89 #define T1_TYPE_MQ 0 /**< Normal coding using entropy coder */
90 #define T1_TYPE_RAW 1 /**< No encoding the information is store under raw format in codestream (mode switch RAW)*/
92 /* ----------------------------------------------------------------------- */
97 Tier-1 coding (coding of code-block coefficients)
99 typedef struct opj_t1 {
101 opj_common_ptr cinfo;
117 #define MACRO_t1_flags(x,y) t1->flags[((x)*(t1->flags_stride))+(y)]
119 /** @name Exported functions */
121 /* ----------------------------------------------------------------------- */
123 Create a new T1 handle
124 and initialize the look-up tables of the Tier-1 coder/decoder
125 @return Returns a new T1 handle if successful, returns NULL otherwise
128 opj_t1_t* t1_create(opj_common_ptr cinfo);
130 Destroy a previously created T1 handle
131 @param t1 T1 handle to destroy
133 void t1_destroy(opj_t1_t *t1);
135 Encode the code-blocks of a tile
137 @param tile The tile to encode
138 @param tcp Tile coding parameters
140 void t1_encode_cblks(opj_t1_t *t1, opj_tcd_tile_t *tile, opj_tcp_t *tcp);
142 Decode the code-blocks of a tile
144 @param tilec The tile to decode
145 @param tccp Tile coding parameters
147 void t1_decode_cblks(opj_t1_t* t1, opj_tcd_tilecomp_t* tilec, opj_tccp_t* tccp);
148 /* ----------------------------------------------------------------------- */