JasPer: jpc_t1cod.h Source File

JasPer 2.0.25 |

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 *
10 * JasPer License Version 2.0
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
15 *
16 * All rights reserved.
17 *
18 * Permission is hereby granted, free of charge, to any person (the
19 * "User") obtaining a copy of this software and associated documentation
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23 * persons to whom the Software is furnished to do so, subject to the
24 * following conditions:
25 *
26 * 1. The above copyright notices and this permission notice (which
27 * includes the disclaimer below) shall be included in all copies or
28 * substantial portions of the Software.
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60 *
61 * __END_OF_JASPER_LICENSE__
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 "jpc_fix.h"
76 #include "jpc_mqcod.h"
77 #include "jpc_tsfb.h"
78 #include "jasper/jas_math.h"
79
80 /******************************************************************************\
81 * Constants.
82 \******************************************************************************/
83
84 /* The number of bits used to index into various lookup tables. */
85 #define JPC_NMSEDEC_BITS 7
86 #define JPC_NMSEDEC_FRACBITS (JPC_NMSEDEC_BITS - 1)
87
88 /*
89 * Segment types.
90 */
91
92 enum jpc_segtype {
94 JPC_SEG_INVALID,
95
96 /* MQ. */
97 JPC_SEG_MQ,
98
99 /* Raw. */
100 JPC_SEG_RAW,
101 };
102
103 /* The nominal word size. */
104 #define JPC_PREC 32
105
106 /* Tier-1 coding pass types. */
107 enum jpc_passtype {
108 JPC_SIGPASS, /*< significance */
109 JPC_REFPASS, /*< refinement */
110 JPC_CLNPASS, /*< cleanup */
111 };
112
113 /*
114 * Per-sample state information for tier-1 coding.
115 */
116
117 /* The northeast neighbour has been found to be significant. */
118 #define JPC_NESIG 0x0001
119 /* The southeast neighbour has been found to be significant. */
120 #define JPC_SESIG 0x0002
121 /* The southwest neighbour has been found to be significant. */
122 #define JPC_SWSIG 0x0004
123 /* The northwest neighbour has been found to be significant. */
124 #define JPC_NWSIG 0x0008
125 /* The north neighbour has been found to be significant. */
126 #define JPC_NSIG 0x0010
127 /* The east neighbour has been found to be significant. */
128 #define JPC_ESIG 0x0020
129 /* The south neighbour has been found to be significant. */
130 #define JPC_SSIG 0x0040
131 /* The west neighbour has been found to be significant. */
132 #define JPC_WSIG 0x0080
133 /* The significance mask for 8-connected neighbours. */
134 #define JPC_OTHSIGMSK \
135 (JPC_NSIG | JPC_NESIG | JPC_ESIG | JPC_SESIG | JPC_SSIG | JPC_SWSIG | JPC_WSIG | JPC_NWSIG)
136 /* The significance mask for 4-connected neighbours. */
137 #define JPC_PRIMSIGMSK (JPC_NSIG | JPC_ESIG | JPC_SSIG | JPC_WSIG)
138
139 /* The north neighbour is negative in value. */
140 #define JPC_NSGN 0x0100
141 /* The east neighbour is negative in value. */
142 #define JPC_ESGN 0x0200
143 /* The south neighbour is negative in value. */
144 #define JPC_SSGN 0x0400
145 /* The west neighbour is negative in value. */
146 #define JPC_WSGN 0x0800
147 /* The sign mask for 4-connected neighbours. */
148 #define JPC_SGNMSK (JPC_NSGN | JPC_ESGN | JPC_SSGN | JPC_WSGN)
149
150 /* This sample has been found to be significant. */
151 #define JPC_SIG 0x1000
152 /* The sample has been refined. */
153 #define JPC_REFINE 0x2000
154 /* This sample has been processed during the significance pass. */
155 #define JPC_VISIT 0x4000
156
157 /* The number of aggregation contexts. */
158 #define JPC_NUMAGGCTXS 1
159 /* The number of zero coding contexts. */
160 #define JPC_NUMZCCTXS 9
161 /* The number of magnitude contexts. */
162 #define JPC_NUMMAGCTXS 3
163 /* The number of sign coding contexts. */
164 #define JPC_NUMSCCTXS 5
165 /* The number of uniform contexts. */
166 #define JPC_NUMUCTXS 1
167
168 /* The context ID for the first aggregation context. */
169 #define JPC_AGGCTXNO 0
170 /* The context ID for the first zero coding context. */
171 #define JPC_ZCCTXNO (JPC_AGGCTXNO + JPC_NUMAGGCTXS)
172 /* The context ID for the first magnitude context. */
173 #define JPC_MAGCTXNO (JPC_ZCCTXNO + JPC_NUMZCCTXS)
174 /* The context ID for the first sign coding context. */
175 #define JPC_SCCTXNO (JPC_MAGCTXNO + JPC_NUMMAGCTXS)
176 /* The context ID for the first uniform context. */
177 #define JPC_UCTXNO (JPC_SCCTXNO + JPC_NUMSCCTXS)
178 /* The total number of contexts. */
179 #define JPC_NUMCTXS (JPC_UCTXNO + JPC_NUMUCTXS)
180
181 /******************************************************************************\
182 * External data.
183 \******************************************************************************/
184
185 /* These lookup tables are used by various macros/functions. */
186 /* Do not access these lookup tables directly. */
187 extern uint_least8_t jpc_zcctxnolut[];
188 extern bool jpc_spblut[];
189 extern uint_least8_t jpc_scctxnolut[];
190 extern uint_least8_t jpc_magctxnolut[];
191 extern jpc_fix_t jpc_refnmsedec[];
192 extern jpc_fix_t jpc_signmsedec[];
193 extern jpc_fix_t jpc_refnmsedec0[];
194 extern jpc_fix_t jpc_signmsedec0[];
195
196 /* The initial settings for the MQ contexts. */
197 extern jpc_mqctx_t jpc_mqctxs[];
198
199 /******************************************************************************\
200 * Functions and macros.
201 \******************************************************************************/
202
203 /* Arithmetic shift right (with ability to shift left also). */
204 JAS_ATTRIBUTE_CONST
205 static inline jpc_fix_t JPC_ASR(jpc_fix_t x, int n)
206 {
207 return n >= 0
208 ? x >> n
209 : x << -n;
210 }
211
212 /* Get the zero coding context. */
213 JAS_ATTRIBUTE_CONST
214 static inline uint_least8_t JPC_GETZCCTXNO(unsigned f, enum jpc_tsfb_orient orient)
215 {
216 return jpc_zcctxnolut[((unsigned)orient << 8) | (f & JPC_OTHSIGMSK)];
217 }
218
219 /* Get the sign prediction bit. */
220 JAS_ATTRIBUTE_CONST
221 static inline bool JPC_GETSPB(unsigned f)
222 {
223 return jpc_spblut[(f & (JPC_PRIMSIGMSK | JPC_SGNMSK)) >> 4];
224 }
225
226 /* Get the sign coding context. */
227 JAS_ATTRIBUTE_CONST
228 static inline uint_least8_t JPC_GETSCCTXNO(unsigned f)
229 {
230 return jpc_scctxnolut[(f & (JPC_PRIMSIGMSK | JPC_SGNMSK)) >> 4];
231 }
232
233 /* Get the magnitude context. */
234 JAS_ATTRIBUTE_CONST
235 static inline uint_least8_t JPC_GETMAGCTXNO(unsigned f)
236 {
237 return jpc_magctxnolut[(f & JPC_OTHSIGMSK) | (((f & JPC_REFINE) != 0) << 11)];
238 }
239
240 /* Get the normalized MSE reduction for significance passes. */
241 JAS_ATTRIBUTE_CONST
242 static inline jpc_fix_t JPC_GETSIGNMSEDEC(jpc_fix_t x, int bitpos)
243 {
244 return bitpos > JPC_NMSEDEC_FRACBITS
245 ? jpc_signmsedec[JPC_ASR(x, bitpos - JPC_NMSEDEC_FRACBITS) & JAS_ONES(JPC_NMSEDEC_BITS)]
246 : jpc_signmsedec0[JPC_ASR(x, bitpos - JPC_NMSEDEC_FRACBITS) & JAS_ONES(JPC_NMSEDEC_BITS)];
247 }
248
249 /* Get the normalized MSE reduction for refinement passes. */
250 JAS_ATTRIBUTE_CONST
251 static inline jpc_fix_t JPC_GETREFNMSEDEC(jpc_fix_t x, int bitpos)
252 {
253 return bitpos > JPC_NMSEDEC_FRACBITS
254 ? jpc_refnmsedec[JPC_ASR(x, bitpos - JPC_NMSEDEC_FRACBITS) & JAS_ONES(JPC_NMSEDEC_BITS)]
255 : jpc_refnmsedec0[JPC_ASR(x, bitpos - JPC_NMSEDEC_FRACBITS) & JAS_ONES(JPC_NMSEDEC_BITS)];
256 }
257
258 /* Update the per-sample state information. */
259 static inline void JPC_UPDATEFLAGS4(jpc_fix_t *fp, unsigned rowstep, bool s, bool vcausalflag)
260 {
261 jpc_fix_t *np = fp - rowstep;
262 jpc_fix_t *sp = fp + rowstep;
263 if (vcausalflag) {
264 sp[-1] |= JPC_NESIG;
265 sp[1] |= JPC_NWSIG;
266 if (s) {
267 *sp |= JPC_NSIG | JPC_NSGN;
268 fp[-1] |= JPC_ESIG | JPC_ESGN;
269 fp[1] |= JPC_WSIG | JPC_WSGN;
270 } else {
271 *sp |= JPC_NSIG;
272 fp[-1] |= JPC_ESIG;
273 fp[1] |= JPC_WSIG;
274 }
275 } else {
276 np[-1] |= JPC_SESIG;
277 np[1] |= JPC_SWSIG;
278 sp[-1] |= JPC_NESIG;
279 sp[1] |= JPC_NWSIG;
280 if (s) {
281 *np |= JPC_SSIG | JPC_SSGN;
282 *sp |= JPC_NSIG | JPC_NSGN;
283 fp[-1] |= JPC_ESIG | JPC_ESGN;
284 fp[1] |= JPC_WSIG | JPC_WSGN;
285 } else {
286 *np |= JPC_SSIG;
287 *sp |= JPC_NSIG;
288 fp[-1] |= JPC_ESIG;
289 fp[1] |= JPC_WSIG;
290 }
291 }
292 }
293
294 /* Initialize the lookup tables used by the codec. */
295 void jpc_initluts(void);
296
297 /* Get the nominal gain associated with a particular band. */
298 JAS_ATTRIBUTE_CONST
299 unsigned JPC_NOMINALGAIN(unsigned qmfbid, unsigned numlvls, unsigned lvlno, enum jpc_tsfb_orient orient);
300
301 /* Get the coding pass type. */
302 JAS_ATTRIBUTE_CONST
303 enum jpc_passtype JPC_PASSTYPE(unsigned passno);
304
305 /* Get the segment type. */
306 JAS_ATTRIBUTE_CONST
307 enum jpc_segtype JPC_SEGTYPE(unsigned passno, unsigned firstpassno, bool bypass);
308
309 /* Get the number of coding passess in the segment. */
310 JAS_ATTRIBUTE_CONST
311 unsigned JPC_SEGPASSCNT(unsigned passno, unsigned firstpassno, unsigned numpasses, bool bypass,
312 bool termall);
313
314 /* Is the coding pass terminated? */
315 JAS_ATTRIBUTE_CONST
316 bool JPC_ISTERMINATED(unsigned passno, unsigned firstpassno, unsigned numpasses, bool termall,
317 bool lazy);
318
319 #endif
jas_math.h
Math-Related Code.