jpc_t1cod.h
1 /*
2 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
3 * British Columbia.
4 * Copyright (c) 2001-2002 Michael David Adams.
5 * All rights reserved.
6 */
7
8 /* __START_OF_JASPER_LICENSE__
9 *
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11 *
12 * Copyright (c) 2001-2006 Michael David Adams
13 * Copyright (c) 1999-2000 Image Power, Inc.
14 * Copyright (c) 1999-2000 The University of British Columbia
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62 */
63
64 /*
65 * $Id$
66 */
67
68 #ifndef JPC_T1COD_H
69 #define JPC_T1COD_H
70
71 /******************************************************************************\
72 * Includes.
73 \******************************************************************************/
74
75 #include "jasper/jas_fix.h"
76 #include "jasper/jas_math.h"
77
78 #include "jpc_mqcod.h"
79 #include "jpc_tsfb.h"
80
81 /******************************************************************************\
82 * Constants.
83 \******************************************************************************/
84
85 /* The number of bits used to index into various lookup tables. */
86 #define JPC_NMSEDEC_BITS 7
87 #define JPC_NMSEDEC_FRACBITS (JPC_NMSEDEC_BITS - 1)
88
89 /*
90 * Segment types.
91 */
92
93 /* Invalid. */
94 #define JPC_SEG_INVALID 0
95 /* MQ. */
96 #define JPC_SEG_MQ 1
97 /* Raw. */
98 #define JPC_SEG_RAW 2
99
100 /* The nominal word size. */
101 #define JPC_PREC 32
102
103 /* Tier-1 coding pass types. */
104 #define JPC_SIGPASS 0 /* significance */
105 #define JPC_REFPASS 1 /* refinement */
106 #define JPC_CLNPASS 2 /* cleanup */
107
108 /*
109 * Per-sample state information for tier-1 coding.
110 */
111
112 /* The northeast neighbour has been found to be significant. */
113 #define JPC_NESIG 0x0001
114 /* The southeast neighbour has been found to be significant. */
115 #define JPC_SESIG 0x0002
116 /* The southwest neighbour has been found to be significant. */
117 #define JPC_SWSIG 0x0004
118 /* The northwest neighbour has been found to be significant. */
119 #define JPC_NWSIG 0x0008
120 /* The north neighbour has been found to be significant. */
121 #define JPC_NSIG 0x0010
122 /* The east neighbour has been found to be significant. */
123 #define JPC_ESIG 0x0020
124 /* The south neighbour has been found to be significant. */
125 #define JPC_SSIG 0x0040
126 /* The west neighbour has been found to be significant. */
127 #define JPC_WSIG 0x0080
128 /* The significance mask for 8-connected neighbours. */
129 #define JPC_OTHSIGMSK \
130 (JPC_NSIG | JPC_NESIG | JPC_ESIG | JPC_SESIG | JPC_SSIG | JPC_SWSIG | JPC_WSIG | JPC_NWSIG)
131 /* The significance mask for 4-connected neighbours. */
132 #define JPC_PRIMSIGMSK (JPC_NSIG | JPC_ESIG | JPC_SSIG | JPC_WSIG)
133
134 /* The north neighbour is negative in value. */
135 #define JPC_NSGN 0x0100
136 /* The east neighbour is negative in value. */
137 #define JPC_ESGN 0x0200
138 /* The south neighbour is negative in value. */
139 #define JPC_SSGN 0x0400
140 /* The west neighbour is negative in value. */
141 #define JPC_WSGN 0x0800
142 /* The sign mask for 4-connected neighbours. */
143 #define JPC_SGNMSK (JPC_NSGN | JPC_ESGN | JPC_SSGN | JPC_WSGN)
144
145 /* This sample has been found to be significant. */
146 #define JPC_SIG 0x1000
147 /* The sample has been refined. */
148 #define JPC_REFINE 0x2000
149 /* This sample has been processed during the significance pass. */
150 #define JPC_VISIT 0x4000
151
152 /* The number of aggregation contexts. */
153 #define JPC_NUMAGGCTXS 1
154 /* The number of zero coding contexts. */
155 #define JPC_NUMZCCTXS 9
156 /* The number of magnitude contexts. */
157 #define JPC_NUMMAGCTXS 3
158 /* The number of sign coding contexts. */
159 #define JPC_NUMSCCTXS 5
160 /* The number of uniform contexts. */
161 #define JPC_NUMUCTXS 1
162
163 /* The context ID for the first aggregation context. */
164 #define JPC_AGGCTXNO 0
165 /* The context ID for the first zero coding context. */
166 #define JPC_ZCCTXNO (JPC_AGGCTXNO + JPC_NUMAGGCTXS)
167 /* The context ID for the first magnitude context. */
168 #define JPC_MAGCTXNO (JPC_ZCCTXNO + JPC_NUMZCCTXS)
169 /* The context ID for the first sign coding context. */
170 #define JPC_SCCTXNO (JPC_MAGCTXNO + JPC_NUMMAGCTXS)
171 /* The context ID for the first uniform context. */
172 #define JPC_UCTXNO (JPC_SCCTXNO + JPC_NUMSCCTXS)
173 /* The total number of contexts. */
174 #define JPC_NUMCTXS (JPC_UCTXNO + JPC_NUMUCTXS)
175
176 /******************************************************************************\
177 * External data.
178 \******************************************************************************/
179
180 /* These lookup tables are used by various macros/functions. */
181 /* Do not access these lookup tables directly. */
182 extern int jpc_zcctxnolut[];
183 extern int jpc_spblut[];
184 extern int jpc_scctxnolut[];
185 extern int jpc_magctxnolut[];
186 extern jpc_fix_t jpc_refnmsedec[];
187 extern jpc_fix_t jpc_signmsedec[];
188 extern jpc_fix_t jpc_refnmsedec0[];
189 extern jpc_fix_t jpc_signmsedec0[];
190
191 /* The initial settings for the MQ contexts. */
192 extern jpc_mqctx_t jpc_mqctxs[];
193
194 /******************************************************************************\
195 * Functions and macros.
196 \******************************************************************************/
197
198 /* Initialize the MQ contexts. */
199 void jpc_initctxs(jpc_mqctx_t *ctxs);
200
201 /* Get the zero coding context. */
202 int jpc_getzcctxno(int f, int orient);
203 #define JPC_GETZCCTXNO(f, orient) \
204 (jpc_zcctxnolut[((orient) << 8) | ((f) & JPC_OTHSIGMSK)])
205
206 /* Get the sign prediction bit. */
207 int jpc_getspb(int f);
208 #define JPC_GETSPB(f) \
209 (jpc_spblut[((f) & (JPC_PRIMSIGMSK | JPC_SGNMSK)) >> 4])
210
211 /* Get the sign coding context. */
212 int jpc_getscctxno(int f);
213 #define JPC_GETSCCTXNO(f) \
214 (jpc_scctxnolut[((f) & (JPC_PRIMSIGMSK | JPC_SGNMSK)) >> 4])
215
216 /* Get the magnitude context. */
217 int jpc_getmagctxno(int f);
218 #define JPC_GETMAGCTXNO(f) \
219 (jpc_magctxnolut[((f) & JPC_OTHSIGMSK) | ((((f) & JPC_REFINE) != 0) << 11)])
220
221 /* Get the normalized MSE reduction for significance passes. */
222 #define JPC_GETSIGNMSEDEC(x, bitpos) jpc_getsignmsedec_macro(x, bitpos)
223 jpc_fix_t jpc_getsignmsedec_func(jpc_fix_t x, int bitpos);
224 #define jpc_getsignmsedec_macro(x, bitpos) \
225 ((bitpos > JPC_NMSEDEC_FRACBITS) ? jpc_signmsedec[JPC_ASR(x, bitpos - JPC_NMSEDEC_FRACBITS) & JAS_ONES(JPC_NMSEDEC_BITS)] : \
226 (jpc_signmsedec0[JPC_ASR(x, bitpos - JPC_NMSEDEC_FRACBITS) & JAS_ONES(JPC_NMSEDEC_BITS)]))
227
228 /* Get the normalized MSE reduction for refinement passes. */
229 #define JPC_GETREFNMSEDEC(x, bitpos) jpc_getrefnmsedec_macro(x, bitpos)
230 jpc_fix_t jpc_refsignmsedec_func(jpc_fix_t x, int bitpos);
231 #define jpc_getrefnmsedec_macro(x, bitpos) \
232 ((bitpos > JPC_NMSEDEC_FRACBITS) ? jpc_refnmsedec[JPC_ASR(x, bitpos - JPC_NMSEDEC_FRACBITS) & JAS_ONES(JPC_NMSEDEC_BITS)] : \
233 (jpc_refnmsedec0[JPC_ASR(x, bitpos - JPC_NMSEDEC_FRACBITS) & JAS_ONES(JPC_NMSEDEC_BITS)]))
234
235 /* Arithmetic shift right (with ability to shift left also). */
236 #define JPC_ASR(x, n) \
237 (((n) >= 0) ? ((x) >> (n)) : ((x) << (-(n))))
238
239 /* Update the per-sample state information. */
240 #define JPC_UPDATEFLAGS4(fp, rowstep, s, vcausalflag) \
241 { \
242 register jpc_fix_t *np = (fp) - (rowstep); \
243 register jpc_fix_t *sp = (fp) + (rowstep); \
244 if ((vcausalflag)) { \
245 sp[-1] |= JPC_NESIG; \
246 sp[1] |= JPC_NWSIG; \
247 if (s) { \
248 *sp |= JPC_NSIG | JPC_NSGN; \
249 (fp)[-1] |= JPC_ESIG | JPC_ESGN; \
250 (fp)[1] |= JPC_WSIG | JPC_WSGN; \
251 } else { \
252 *sp |= JPC_NSIG; \
253 (fp)[-1] |= JPC_ESIG; \
254 (fp)[1] |= JPC_WSIG; \
255 } \
256 } else { \
257 np[-1] |= JPC_SESIG; \
258 np[1] |= JPC_SWSIG; \
259 sp[-1] |= JPC_NESIG; \
260 sp[1] |= JPC_NWSIG; \
261 if (s) { \
262 *np |= JPC_SSIG | JPC_SSGN; \
263 *sp |= JPC_NSIG | JPC_NSGN; \
264 (fp)[-1] |= JPC_ESIG | JPC_ESGN; \
265 (fp)[1] |= JPC_WSIG | JPC_WSGN; \
266 } else { \
267 *np |= JPC_SSIG; \
268 *sp |= JPC_NSIG; \
269 (fp)[-1] |= JPC_ESIG; \
270 (fp)[1] |= JPC_WSIG; \
271 } \
272 } \
273 }
274
275 /* Initialize the lookup tables used by the codec. */
276 void jpc_initluts(void);
277
278 /* Get the nominal gain associated with a particular band. */
279 int JPC_NOMINALGAIN(int qmfbid, int numlvls, int lvlno, int orient);
280
281 /* Get the coding pass type. */
282 int JPC_PASSTYPE(int passno);
283
284 /* Get the segment type. */
285 int JPC_SEGTYPE(int passno, int firstpassno, int bypass);
286
287 /* Get the number of coding passess in the segment. */
288 int JPC_SEGPASSCNT(int passno, int firstpassno, int numpasses, int bypass,
289 int termall);
290
291 /* Is the coding pass terminated? */
292 int JPC_ISTERMINATED(int passno, int firstpassno, int numpasses, int termall,
293 int lazy);
294
295 #endif