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8 * Copyright (c) 2002-2014, Professor Benoit Macq
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10 * Copyright (c) 2002-2003, Yannick Verschueren
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12 * Copyright (c) 2003-2014, Antonin Descampe
13 * Copyright (c) 2005, Herve Drolon, FreeImage Team
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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 /* CAUTION: the value of those constants must not be changed, otherwise the */
54 /* optimization of opj_t1_updateflags() will break! */
55 /* BEGINNING of flags that apply to opj_flag_t */
56 #define T1_SIG_NE 0x0001U /**< Context orientation : North-East direction */
57 #define T1_SIG_SE 0x0002U /**< Context orientation : South-East direction */
58 #define T1_SIG_SW 0x0004U /**< Context orientation : South-West direction */
59 #define T1_SIG_NW 0x0008U /**< Context orientation : North-West direction */
60 #define T1_SIG_N 0x0010U /**< Context orientation : North direction */
61 #define T1_SIG_E 0x0020U /**< Context orientation : East direction */
62 #define T1_SIG_S 0x0040U /**< Context orientation : South direction */
63 #define T1_SIG_W 0x0080U /**< Context orientation : West direction */
64 #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)
65 #define T1_SIG_PRIM (T1_SIG_N|T1_SIG_E|T1_SIG_S|T1_SIG_W)
67 #define T1_SGN_N 0x0100U
68 #define T1_SGN_E 0x0200U
69 #define T1_SGN_S 0x0400U
70 #define T1_SGN_W 0x0800U
71 #define T1_SGN (T1_SGN_N|T1_SGN_E|T1_SGN_S|T1_SGN_W)
73 #define T1_SIG 0x1000U /**< No longer used by decoder */
74 #define T1_REFINE 0x2000U /**< No longer used by decoder */
75 #define T1_VISIT 0x4000U /**< No longer used by decoder */
76 /* END of flags that apply to opj_flag_t */
78 #define T1_NUMCTXS_ZC 9
79 #define T1_NUMCTXS_SC 5
80 #define T1_NUMCTXS_MAG 3
81 #define T1_NUMCTXS_AGG 1
82 #define T1_NUMCTXS_UNI 1
85 #define T1_CTXNO_SC (T1_CTXNO_ZC+T1_NUMCTXS_ZC)
86 #define T1_CTXNO_MAG (T1_CTXNO_SC+T1_NUMCTXS_SC)
87 #define T1_CTXNO_AGG (T1_CTXNO_MAG+T1_NUMCTXS_MAG)
88 #define T1_CTXNO_UNI (T1_CTXNO_AGG+T1_NUMCTXS_AGG)
89 #define T1_NUMCTXS (T1_CTXNO_UNI+T1_NUMCTXS_UNI)
91 #define T1_NMSEDEC_FRACBITS (T1_NMSEDEC_BITS-1)
93 #define T1_TYPE_MQ 0 /**< Normal coding using entropy coder */
94 #define T1_TYPE_RAW 1 /**< No encoding the information is store under raw format in codestream (mode switch RAW)*/
96 /* Those flags are used by opj_colflag_t */
97 #define T1_COLFLAG_RBS 4U /* RBS = Row Bit Shift */
98 #define T1_COLFLAG_SIG_OTHER_ROW_0 (1U << 0U) /**< This sample has at least one significant neighbour */
99 #define T1_COLFLAG_SIG_ROW_0 (1U << 1U) /**< This sample is significant */
100 #define T1_COLFLAG_VISIT_ROW_0 (1U << 2U) /**< This sample has been visited */
101 #define T1_COLFLAG_REFINE_ROW_0 (1U << 3U) /**< This sample has been refined */
102 #define T1_COLFLAG_SIG_OTHER_ROW_1 (T1_COLFLAG_SIG_OTHER_ROW_0 << (1U * T1_COLFLAG_RBS))
103 #define T1_COLFLAG_SIG_ROW_1 (T1_COLFLAG_SIG_ROW_0 << (1U * T1_COLFLAG_RBS))
104 #define T1_COLFLAG_VISIT_ROW_1 (T1_COLFLAG_VISIT_ROW_0 << (1U * T1_COLFLAG_RBS))
105 #define T1_COLFLAG_REFINE_ROW_1 (T1_COLFLAG_REFINE_ROW_0 << (1U * T1_COLFLAG_RBS))
106 #define T1_COLFLAG_SIG_OTHER_ROW_2 (T1_COLFLAG_SIG_OTHER_ROW_0 << (2U * T1_COLFLAG_RBS))
107 #define T1_COLFLAG_SIG_ROW_2 (T1_COLFLAG_SIG_ROW_0 << (2U * T1_COLFLAG_RBS))
108 #define T1_COLFLAG_VISIT_ROW_2 (T1_COLFLAG_VISIT_ROW_0 << (2U * T1_COLFLAG_RBS))
109 #define T1_COLFLAG_REFINE_ROW_2 (T1_COLFLAG_REFINE_ROW_0 << (2U * T1_COLFLAG_RBS))
110 #define T1_COLFLAG_SIG_OTHER_ROW_3 (T1_COLFLAG_SIG_OTHER_ROW_0 << (3U * T1_COLFLAG_RBS))
111 #define T1_COLFLAG_SIG_ROW_3 (T1_COLFLAG_SIG_ROW_0 << (3U * T1_COLFLAG_RBS))
112 #define T1_COLFLAG_VISIT_ROW_3 (T1_COLFLAG_VISIT_ROW_0 << (3U * T1_COLFLAG_RBS))
113 #define T1_COLFLAG_REFINE_ROW_3 (T1_COLFLAG_REFINE_ROW_0 << (3U * T1_COLFLAG_RBS))
115 /* ----------------------------------------------------------------------- */
117 typedef OPJ_UINT16 opj_flag_t;
119 /** Flags for 4 consecutive rows of a column */
120 typedef OPJ_UINT16 opj_colflag_t;
123 Tier-1 coding (coding of code-block coefficients)
125 typedef struct opj_t1 {
134 /** Addition flag array such that colflags[1+0] is for state of col=0,row=0..3,
135 colflags[1+1] for col=1, row=0..3, colflags[1+flags_stride] for col=0,row=4..7, ...
136 This array avoids too much cache trashing when processing by 4 vertical samples
137 as done in the various decoding steps. */
138 opj_colflag_t* colflags;
142 OPJ_UINT32 flagssize;
143 OPJ_UINT32 flags_stride;
144 OPJ_UINT32 colflags_size;
145 OPJ_UINT32 data_stride;
149 #define MACRO_t1_flags(x,y) t1->flags[((x)*(t1->flags_stride))+(y)]
151 /** @name Exported functions */
153 /* ----------------------------------------------------------------------- */
156 Encode the code-blocks of a tile
158 @param tile The tile to encode
159 @param tcp Tile coding parameters
160 @param mct_norms FIXME DOC
161 @param mct_numcomps Number of components used for MCT
163 OPJ_BOOL opj_t1_encode_cblks( opj_t1_t *t1,
164 opj_tcd_tile_t *tile,
166 const OPJ_FLOAT64 * mct_norms,
167 OPJ_UINT32 mct_numcomps);
170 Decode the code-blocks of a tile
172 @param tilec The tile to decode
173 @param tccp Tile coding parameters
175 void opj_t1_decode_cblks( opj_thread_pool_t* tp,
176 volatile OPJ_BOOL* pret,
177 opj_tcd_tilecomp_t* tilec,
183 * Creates a new Tier 1 handle
184 * and initializes the look-up tables of the Tier-1 coder/decoder
185 * @return a new T1 handle if successful, returns NULL otherwise
187 opj_t1_t* opj_t1_create(OPJ_BOOL isEncoder);
190 * Destroys a previously created T1 handle
192 * @param p_t1 Tier 1 handle to destroy
194 void opj_t1_destroy(opj_t1_t *p_t1);
195 /* ----------------------------------------------------------------------- */