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8 * Copyright (c) 2002-2014, Professor Benoit Macq
9 * Copyright (c) 2001-2003, David Janssens
10 * Copyright (c) 2002-2003, Yannick Verschueren
11 * Copyright (c) 2003-2007, Francois-Olivier Devaux
12 * Copyright (c) 2003-2014, Antonin Descampe
13 * Copyright (c) 2005, Herve Drolon, FreeImage Team
14 * Copyright (c) 2012, Carl Hetherington
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42 @brief Implementation of the tier-1 coding (coding of code-block coefficients) (T1)
44 The functions in T1.C have for goal to realize the tier-1 coding operation. The functions
45 in T1.C are used by some function in TCD.C.
48 /** @defgroup T1 T1 - Implementation of the tier-1 coding */
51 /* ----------------------------------------------------------------------- */
52 #define T1_NMSEDEC_BITS 7
54 /* CAUTION: the value of those constants must not be changed, otherwise the */
55 /* optimization of opj_t1_updateflags() will break! */
56 /* BEGINNING of flags that apply to opj_flag_t */
57 #define T1_SIG_NE 0x0001U /**< Context orientation : North-East direction */
58 #define T1_SIG_SE 0x0002U /**< Context orientation : South-East direction */
59 #define T1_SIG_SW 0x0004U /**< Context orientation : South-West direction */
60 #define T1_SIG_NW 0x0008U /**< Context orientation : North-West direction */
61 #define T1_SIG_N 0x0010U /**< Context orientation : North direction */
62 #define T1_SIG_E 0x0020U /**< Context orientation : East direction */
63 #define T1_SIG_S 0x0040U /**< Context orientation : South direction */
64 #define T1_SIG_W 0x0080U /**< Context orientation : West direction */
65 #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)
66 #define T1_SIG_PRIM (T1_SIG_N|T1_SIG_E|T1_SIG_S|T1_SIG_W)
68 #define T1_SGN_N 0x0100U
69 #define T1_SGN_E 0x0200U
70 #define T1_SGN_S 0x0400U
71 #define T1_SGN_W 0x0800U
72 #define T1_SGN (T1_SGN_N|T1_SGN_E|T1_SGN_S|T1_SGN_W)
74 #define T1_SIG 0x1000U /**< No longer used by decoder */
75 #define T1_REFINE 0x2000U /**< No longer used by decoder */
76 #define T1_VISIT 0x4000U /**< No longer used by decoder */
77 /* END of flags that apply to opj_flag_t */
79 #define T1_NUMCTXS_ZC 9
80 #define T1_NUMCTXS_SC 5
81 #define T1_NUMCTXS_MAG 3
82 #define T1_NUMCTXS_AGG 1
83 #define T1_NUMCTXS_UNI 1
86 #define T1_CTXNO_SC (T1_CTXNO_ZC+T1_NUMCTXS_ZC)
87 #define T1_CTXNO_MAG (T1_CTXNO_SC+T1_NUMCTXS_SC)
88 #define T1_CTXNO_AGG (T1_CTXNO_MAG+T1_NUMCTXS_MAG)
89 #define T1_CTXNO_UNI (T1_CTXNO_AGG+T1_NUMCTXS_AGG)
90 #define T1_NUMCTXS (T1_CTXNO_UNI+T1_NUMCTXS_UNI)
92 #define T1_NMSEDEC_FRACBITS (T1_NMSEDEC_BITS-1)
94 #define T1_TYPE_MQ 0 /**< Normal coding using entropy coder */
95 #define T1_TYPE_RAW 1 /**< No encoding the information is store under raw format in codestream (mode switch RAW)*/
97 /* Those flags are used by opj_colflag_t */
98 #define T1_COLFLAG_RBS 4U /* RBS = Row Bit Shift */
99 #define T1_COLFLAG_SIG_OTHER_ROW_0 (1U << 0U) /**< This sample has at least one significant neighbour */
100 #define T1_COLFLAG_SIG_ROW_0 (1U << 1U) /**< This sample is significant */
101 #define T1_COLFLAG_VISIT_ROW_0 (1U << 2U) /**< This sample has been visited */
102 #define T1_COLFLAG_REFINE_ROW_0 (1U << 3U) /**< This sample has been refined */
103 #define T1_COLFLAG_SIG_OTHER_ROW_1 (T1_COLFLAG_SIG_OTHER_ROW_0 << (1U * T1_COLFLAG_RBS))
104 #define T1_COLFLAG_SIG_ROW_1 (T1_COLFLAG_SIG_ROW_0 << (1U * T1_COLFLAG_RBS))
105 #define T1_COLFLAG_VISIT_ROW_1 (T1_COLFLAG_VISIT_ROW_0 << (1U * T1_COLFLAG_RBS))
106 #define T1_COLFLAG_REFINE_ROW_1 (T1_COLFLAG_REFINE_ROW_0 << (1U * T1_COLFLAG_RBS))
107 #define T1_COLFLAG_SIG_OTHER_ROW_2 (T1_COLFLAG_SIG_OTHER_ROW_0 << (2U * T1_COLFLAG_RBS))
108 #define T1_COLFLAG_SIG_ROW_2 (T1_COLFLAG_SIG_ROW_0 << (2U * T1_COLFLAG_RBS))
109 #define T1_COLFLAG_VISIT_ROW_2 (T1_COLFLAG_VISIT_ROW_0 << (2U * T1_COLFLAG_RBS))
110 #define T1_COLFLAG_REFINE_ROW_2 (T1_COLFLAG_REFINE_ROW_0 << (2U * T1_COLFLAG_RBS))
111 #define T1_COLFLAG_SIG_OTHER_ROW_3 (T1_COLFLAG_SIG_OTHER_ROW_0 << (3U * T1_COLFLAG_RBS))
112 #define T1_COLFLAG_SIG_ROW_3 (T1_COLFLAG_SIG_ROW_0 << (3U * T1_COLFLAG_RBS))
113 #define T1_COLFLAG_VISIT_ROW_3 (T1_COLFLAG_VISIT_ROW_0 << (3U * T1_COLFLAG_RBS))
114 #define T1_COLFLAG_REFINE_ROW_3 (T1_COLFLAG_REFINE_ROW_0 << (3U * T1_COLFLAG_RBS))
117 /* BEGINNING of flags that apply to opj_flag_enc_t */
118 /** We hold the state of individual data points for the T1 encoder using
119 * a single 32-bit flags word to hold the state of 4 data points. This corresponds
120 * to the 4-point-high columns that the data is processed in.
122 * These #defines declare the layout of a 32-bit flags word.
124 * This is currently done for encoding only.
127 #define T1_SIGMA_0 (1U << 0)
128 #define T1_SIGMA_1 (1U << 1)
129 #define T1_SIGMA_2 (1U << 2)
130 #define T1_SIGMA_3 (1U << 3)
131 #define T1_SIGMA_4 (1U << 4)
132 #define T1_SIGMA_5 (1U << 5)
133 #define T1_SIGMA_6 (1U << 6)
134 #define T1_SIGMA_7 (1U << 7)
135 #define T1_SIGMA_8 (1U << 8)
136 #define T1_SIGMA_9 (1U << 9)
137 #define T1_SIGMA_10 (1U << 10)
138 #define T1_SIGMA_11 (1U << 11)
139 #define T1_SIGMA_12 (1U << 12)
140 #define T1_SIGMA_13 (1U << 13)
141 #define T1_SIGMA_14 (1U << 14)
142 #define T1_SIGMA_15 (1U << 15)
143 #define T1_SIGMA_16 (1U << 16)
144 #define T1_SIGMA_17 (1U << 17)
146 #define T1_CHI_0 (1U << 18)
147 #define T1_CHI_0_I 18
148 #define T1_CHI_1 (1U << 19)
149 #define T1_CHI_1_I 19
150 #define T1_MU_0 (1U << 20)
151 #define T1_PI_0 (1U << 21)
152 #define T1_CHI_2 (1U << 22)
153 #define T1_CHI_2_I 22
154 #define T1_MU_1 (1U << 23)
155 #define T1_PI_1 (1U << 24)
156 #define T1_CHI_3 (1U << 25)
157 #define T1_MU_2 (1U << 26)
158 #define T1_PI_2 (1U << 27)
159 #define T1_CHI_4 (1U << 28)
160 #define T1_MU_3 (1U << 29)
161 #define T1_PI_3 (1U << 30)
162 #define T1_CHI_5 (1U << 31)
165 /** As an example, the bits T1_SIGMA_3, T1_SIGMA_4 and T1_SIGMA_5
166 * indicate the significance state of the west neighbour of data point zero
167 * of our four, the point itself, and its east neighbour respectively.
168 * Many of the bits are arranged so that given a flags word, you can
169 * look at the values for the data point 0, then shift the flags
170 * word right by 3 bits and look at the same bit positions to see the
171 * values for data point 1.
173 * The #defines below help a bit with this; say you have a flags word
174 * f, you can do things like
176 * (f & T1_SIGMA_THIS)
178 * to see the significance bit of data point 0, then do
180 * ((f >> 3) & T1_SIGMA_THIS)
182 * to see the significance bit of data point 1.
185 #define T1_SIGMA_NW T1_SIGMA_0
186 #define T1_SIGMA_N T1_SIGMA_1
187 #define T1_SIGMA_NE T1_SIGMA_2
188 #define T1_SIGMA_W T1_SIGMA_3
189 #define T1_SIGMA_THIS T1_SIGMA_4
190 #define T1_SIGMA_E T1_SIGMA_5
191 #define T1_SIGMA_SW T1_SIGMA_6
192 #define T1_SIGMA_S T1_SIGMA_7
193 #define T1_SIGMA_SE T1_SIGMA_8
194 #define T1_SIGMA_NEIGHBOURS (T1_SIGMA_NW | T1_SIGMA_N | T1_SIGMA_NE | T1_SIGMA_W | T1_SIGMA_E | T1_SIGMA_SW | T1_SIGMA_S | T1_SIGMA_SE)
196 #define T1_CHI_THIS T1_CHI_1
197 #define T1_CHI_THIS_I T1_CHI_1_I
198 #define T1_MU_THIS T1_MU_0
199 #define T1_PI_THIS T1_PI_0
201 #define T1_LUT_SGN_W (1U << 0)
202 #define T1_LUT_SIG_N (1U << 1)
203 #define T1_LUT_SGN_E (1U << 2)
204 #define T1_LUT_SIG_W (1U << 3)
205 #define T1_LUT_SGN_N (1U << 4)
206 #define T1_LUT_SIG_E (1U << 5)
207 #define T1_LUT_SGN_S (1U << 6)
208 #define T1_LUT_SIG_S (1U << 7)
209 /* END of flags that apply to opj_flag_enc_t */
211 /* ----------------------------------------------------------------------- */
213 typedef OPJ_UINT16 opj_flag_t;
215 /** Flags for 4 consecutive rows of a column */
216 typedef OPJ_UINT16 opj_colflag_t;
218 typedef OPJ_UINT32 opj_flag_enc_t;
221 Tier-1 coding (coding of code-block coefficients)
223 typedef struct opj_t1 {
231 /** Flags used by decoder */
233 /** Addition flag array such that colflags[1+0] is for state of col=0,row=0..3,
234 colflags[1+1] for col=1, row=0..3, colflags[1+flags_stride] for col=0,row=4..7, ...
235 This array avoids too much cache trashing when processing by 4 vertical samples
236 as done in the various decoding steps. */
237 opj_colflag_t* colflags;
238 /** Flags used by encoder */
239 opj_flag_enc_t *enc_flags;
243 OPJ_UINT32 flagssize;
244 OPJ_UINT32 flags_stride;
245 OPJ_UINT32 colflags_size;
246 OPJ_UINT32 data_stride;
250 #define MACRO_t1_flags(x,y) t1->flags[((x)*(t1->flags_stride))+(y)]
252 /** @name Exported functions */
254 /* ----------------------------------------------------------------------- */
257 Encode the code-blocks of a tile
259 @param tile The tile to encode
260 @param tcp Tile coding parameters
261 @param mct_norms FIXME DOC
262 @param mct_numcomps Number of components used for MCT
264 OPJ_BOOL opj_t1_encode_cblks(opj_t1_t *t1,
265 opj_tcd_tile_t *tile,
267 const OPJ_FLOAT64 * mct_norms,
268 OPJ_UINT32 mct_numcomps);
271 Decode the code-blocks of a tile
273 @param tilec The tile to decode
274 @param tccp Tile coding parameters
276 void opj_t1_decode_cblks(opj_thread_pool_t* tp,
277 volatile OPJ_BOOL* pret,
278 opj_tcd_tilecomp_t* tilec,
284 * Creates a new Tier 1 handle
285 * and initializes the look-up tables of the Tier-1 coder/decoder
286 * @return a new T1 handle if successful, returns NULL otherwise
288 opj_t1_t* opj_t1_create(OPJ_BOOL isEncoder);
291 * Destroys a previously created T1 handle
293 * @param p_t1 Tier 1 handle to destroy
295 void opj_t1_destroy(opj_t1_t *p_t1);
296 /* ----------------------------------------------------------------------- */