summaryrefslogtreecommitdiffstats
path: root/common/zywrletemplate.c
blob: 904de401c27d301f5380860d475e8113c084e7df (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828

/********************************************************************
 *                                                                  *
 * THIS FILE IS PART OF THE 'ZYWRLE' VNC CODEC SOURCE CODE.         *
 *                                                                  *
 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
 * GOVERNED BY A FOLLOWING BSD-STYLE SOURCE LICENSE.                *
 * PLEASE READ THESE TERMS BEFORE DISTRIBUTING.                     *
 *                                                                  *
 * THE 'ZYWRLE' VNC CODEC SOURCE CODE IS (C) COPYRIGHT 2006         *
 * BY Hitachi Systems & Services, Ltd.                              *
 * (Noriaki Yamazaki, Research & Developement Center)               *                                                                 *
 *                                                                  *
 ********************************************************************
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.

- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.

- Neither the name of the Hitachi Systems & Services, Ltd. nor
the names of its contributors may be used to endorse or promote
products derived from this software without specific prior written
permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ********************************************************************/

/* Change Log:
     V0.02 : 2008/02/04 : Fix mis encode/decode when width != scanline
	                     (Thanks Johannes Schindelin, author of LibVNC
						  Server/Client)
     V0.01 : 2007/02/06 : Initial release
*/

/* #define ZYWRLE_ENCODE */
/* #define ZYWRLE_DECODE */
#define ZYWRLE_QUANTIZE

/*
[References]
 PLHarr:
   Senecal, J. G., P. Lindstrom, M. A. Duchaineau, and K. I. Joy, "An Improved N-Bit to N-Bit Reversible Haar-Like Transform," Pacific Graphics 2004, October 2004, pp. 371-380.
 EZW:
   Shapiro, JM: Embedded Image Coding Using Zerotrees of Wavelet Coefficients, IEEE Trans. Signal. Process., Vol.41, pp.3445-3462 (1993).
*/


/* Template Macro stuffs. */
#undef ZYWRLE_ANALYZE
#undef ZYWRLE_SYNTHESIZE
#define ZYWRLE_ANALYZE __RFB_CONCAT3E(zywrleAnalyze,BPP,END_FIX)
#define ZYWRLE_SYNTHESIZE __RFB_CONCAT3E(zywrleSynthesize,BPP,END_FIX)

#define ZYWRLE_RGBYUV __RFB_CONCAT3E(zywrleRGBYUV,BPP,END_FIX)
#define ZYWRLE_YUVRGB __RFB_CONCAT3E(zywrleYUVRGB,BPP,END_FIX)
#define ZYWRLE_YMASK __RFB_CONCAT2E(ZYWRLE_YMASK,BPP)
#define ZYWRLE_UVMASK __RFB_CONCAT2E(ZYWRLE_UVMASK,BPP)
#define ZYWRLE_LOAD_PIXEL __RFB_CONCAT2E(ZYWRLE_LOAD_PIXEL,BPP)
#define ZYWRLE_SAVE_PIXEL __RFB_CONCAT2E(ZYWRLE_SAVE_PIXEL,BPP)

/* Packing/Unpacking pixel stuffs.
   Endian conversion stuffs. */
#undef S_0
#undef S_1
#undef L_0
#undef L_1
#undef L_2
#if ZYWRLE_ENDIAN == ENDIAN_BIG
#  define S_0	1
#  define S_1	0
#  define L_0	3
#  define L_1	2
#  define L_2	1
#else
#  define S_0	0
#  define S_1	1
#  define L_0	0
#  define L_1	1
#  define L_2	2
#endif

/*   Load/Save pixel stuffs. */
#define ZYWRLE_YMASK15  0xFFFFFFF8
#define ZYWRLE_UVMASK15 0xFFFFFFF8
#define ZYWRLE_LOAD_PIXEL15(pSrc,R,G,B) { \
	R =  (((unsigned char*)pSrc)[S_1]<< 1)& 0xF8;	\
	G = ((((unsigned char*)pSrc)[S_1]<< 6)|(((unsigned char*)pSrc)[S_0]>> 2))& 0xF8;	\
	B =  (((unsigned char*)pSrc)[S_0]<< 3)& 0xF8;	\
}
#define ZYWRLE_SAVE_PIXEL15(pDst,R,G,B) { \
	R &= 0xF8;	\
	G &= 0xF8;	\
	B &= 0xF8;	\
	((unsigned char*)pDst)[S_1] = (unsigned char)( (R>>1)|(G>>6)       );	\
	((unsigned char*)pDst)[S_0] = (unsigned char)(((B>>3)|(G<<2))& 0xFF);	\
}
#define ZYWRLE_YMASK16  0xFFFFFFFC
#define ZYWRLE_UVMASK16 0xFFFFFFF8
#define ZYWRLE_LOAD_PIXEL16(pSrc,R,G,B) { \
	R =   ((unsigned char*)pSrc)[S_1]     & 0xF8;	\
	G = ((((unsigned char*)pSrc)[S_1]<< 5)|(((unsigned char*)pSrc)[S_0]>> 3))& 0xFC;	\
	B =  (((unsigned char*)pSrc)[S_0]<< 3)& 0xF8;	\
}
#define ZYWRLE_SAVE_PIXEL16(pDst,R,G,B) { \
	R &= 0xF8;	\
	G &= 0xFC;	\
	B &= 0xF8;	\
	((unsigned char*)pDst)[S_1] = (unsigned char)(  R    |(G>>5)       );	\
	((unsigned char*)pDst)[S_0] = (unsigned char)(((B>>3)|(G<<3))& 0xFF);	\
}
#define ZYWRLE_YMASK32  0xFFFFFFFF
#define ZYWRLE_UVMASK32 0xFFFFFFFF
#define ZYWRLE_LOAD_PIXEL32(pSrc,R,G,B) { \
	R = ((unsigned char*)pSrc)[L_2];	\
	G = ((unsigned char*)pSrc)[L_1];	\
	B = ((unsigned char*)pSrc)[L_0];	\
}
#define ZYWRLE_SAVE_PIXEL32(pDst,R,G,B) { \
	((unsigned char*)pDst)[L_2] = (unsigned char)R;	\
	((unsigned char*)pDst)[L_1] = (unsigned char)G;	\
	((unsigned char*)pDst)[L_0] = (unsigned char)B;	\
}

#ifndef ZYWRLE_ONCE
#define ZYWRLE_ONCE

#ifdef WIN32
#define InlineX __inline
#else
# ifndef __STRICT_ANSI__
#  define InlineX inline
# else
#  define InlineX
# endif
#endif

#ifdef ZYWRLE_ENCODE
/* Tables for Coefficients filtering. */
#  ifndef ZYWRLE_QUANTIZE
/* Type A:lower bit omitting of EZW style. */
const static unsigned int zywrleParam[3][3]={
	{0x0000F000,0x00000000,0x00000000},
	{0x0000C000,0x00F0F0F0,0x00000000},
	{0x0000C000,0x00C0C0C0,0x00F0F0F0},
/*	{0x0000FF00,0x00000000,0x00000000},
	{0x0000FF00,0x00FFFFFF,0x00000000},
	{0x0000FF00,0x00FFFFFF,0x00FFFFFF}, */
};
#  else
/* Type B:Non liner quantization filter. */
static const signed char zywrleConv[4][256]={
{	/* bi=5, bo=5 r=0.0:PSNR=24.849 */
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
},
{	/* bi=5, bo=5 r=2.0:PSNR=74.031 */
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 32,
	32, 32, 32, 32, 32, 32, 32, 32,
	32, 32, 32, 32, 32, 32, 32, 32,
	48, 48, 48, 48, 48, 48, 48, 48,
	48, 48, 48, 56, 56, 56, 56, 56,
	56, 56, 56, 56, 64, 64, 64, 64,
	64, 64, 64, 64, 72, 72, 72, 72,
	72, 72, 72, 72, 80, 80, 80, 80,
	80, 80, 88, 88, 88, 88, 88, 88,
	88, 88, 88, 88, 88, 88, 96, 96,
	96, 96, 96, 104, 104, 104, 104, 104,
	104, 104, 104, 104, 104, 112, 112, 112,
	112, 112, 112, 112, 112, 112, 120, 120,
	120, 120, 120, 120, 120, 120, 120, 120,
	0, -120, -120, -120, -120, -120, -120, -120,
	-120, -120, -120, -112, -112, -112, -112, -112,
	-112, -112, -112, -112, -104, -104, -104, -104,
	-104, -104, -104, -104, -104, -104, -96, -96,
	-96, -96, -96, -88, -88, -88, -88, -88,
	-88, -88, -88, -88, -88, -88, -88, -80,
	-80, -80, -80, -80, -80, -72, -72, -72,
	-72, -72, -72, -72, -72, -64, -64, -64,
	-64, -64, -64, -64, -64, -56, -56, -56,
	-56, -56, -56, -56, -56, -56, -48, -48,
	-48, -48, -48, -48, -48, -48, -48, -48,
	-48, -32, -32, -32, -32, -32, -32, -32,
	-32, -32, -32, -32, -32, -32, -32, -32,
	-32, -32, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
},
{	/* bi=5, bo=4 r=2.0:PSNR=64.441 */
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	48, 48, 48, 48, 48, 48, 48, 48,
	48, 48, 48, 48, 48, 48, 48, 48,
	48, 48, 48, 48, 48, 48, 48, 48,
	64, 64, 64, 64, 64, 64, 64, 64,
	64, 64, 64, 64, 64, 64, 64, 64,
	80, 80, 80, 80, 80, 80, 80, 80,
	80, 80, 80, 80, 80, 88, 88, 88,
	88, 88, 88, 88, 88, 88, 88, 88,
	104, 104, 104, 104, 104, 104, 104, 104,
	104, 104, 104, 112, 112, 112, 112, 112,
	112, 112, 112, 112, 120, 120, 120, 120,
	120, 120, 120, 120, 120, 120, 120, 120,
	0, -120, -120, -120, -120, -120, -120, -120,
	-120, -120, -120, -120, -120, -112, -112, -112,
	-112, -112, -112, -112, -112, -112, -104, -104,
	-104, -104, -104, -104, -104, -104, -104, -104,
	-104, -88, -88, -88, -88, -88, -88, -88,
	-88, -88, -88, -88, -80, -80, -80, -80,
	-80, -80, -80, -80, -80, -80, -80, -80,
	-80, -64, -64, -64, -64, -64, -64, -64,
	-64, -64, -64, -64, -64, -64, -64, -64,
	-64, -48, -48, -48, -48, -48, -48, -48,
	-48, -48, -48, -48, -48, -48, -48, -48,
	-48, -48, -48, -48, -48, -48, -48, -48,
	-48, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
},
{	/* bi=5, bo=2 r=2.0:PSNR=43.175 */
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	88, 88, 88, 88, 88, 88, 88, 88,
	88, 88, 88, 88, 88, 88, 88, 88,
	88, 88, 88, 88, 88, 88, 88, 88,
	88, 88, 88, 88, 88, 88, 88, 88,
	88, 88, 88, 88, 88, 88, 88, 88,
	88, 88, 88, 88, 88, 88, 88, 88,
	88, 88, 88, 88, 88, 88, 88, 88,
	88, 88, 88, 88, 88, 88, 88, 88,
	0, -88, -88, -88, -88, -88, -88, -88,
	-88, -88, -88, -88, -88, -88, -88, -88,
	-88, -88, -88, -88, -88, -88, -88, -88,
	-88, -88, -88, -88, -88, -88, -88, -88,
	-88, -88, -88, -88, -88, -88, -88, -88,
	-88, -88, -88, -88, -88, -88, -88, -88,
	-88, -88, -88, -88, -88, -88, -88, -88,
	-88, -88, -88, -88, -88, -88, -88, -88,
	-88, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
}
};
const static signed char* zywrleParam[3][3][3]={
	{{zywrleConv[0],zywrleConv[2],zywrleConv[0]},{zywrleConv[0],zywrleConv[0],zywrleConv[0]},{zywrleConv[0],zywrleConv[0],zywrleConv[0]}},
	{{zywrleConv[0],zywrleConv[3],zywrleConv[0]},{zywrleConv[1],zywrleConv[1],zywrleConv[1]},{zywrleConv[0],zywrleConv[0],zywrleConv[0]}},
	{{zywrleConv[0],zywrleConv[3],zywrleConv[0]},{zywrleConv[2],zywrleConv[2],zywrleConv[2]},{zywrleConv[1],zywrleConv[1],zywrleConv[1]}},
};
#  endif
#endif

static InlineX void Harr(signed char* pX0, signed char* pX1)
{
	/* Piecewise-Linear Harr(PLHarr) */
	int X0 = (int)*pX0, X1 = (int)*pX1;
	int orgX0 = X0, orgX1 = X1;
	if ((X0 ^ X1) & 0x80) {
		/* differ sign */
		X1 += X0;
		if (((X1^orgX1)&0x80)==0) {
			/* |X1| > |X0| */
			X0 -= X1;	/* H = -B */
		}
	} else {
		/* same sign */
		X0 -= X1;
		if (((X0 ^ orgX0) & 0x80) == 0) {
			/* |X0| > |X1| */
			X1 += X0;	/* L = A */
		}
	}
	*pX0 = (signed char)X1;
	*pX1 = (signed char)X0;
}
/*
 1D-Wavelet transform.

 In coefficients array, the famous 'pyramid' decomposition is well used.

 1D Model:
   |L0L0L0L0|L0L0L0L0|H0H0H0H0|H0H0H0H0| : level 0
   |L1L1L1L1|H1H1H1H1|H0H0H0H0|H0H0H0H0| : level 1

 But this method needs line buffer because H/L is different position from X0/X1.
 So, I used 'interleave' decomposition instead of it.

 1D Model:
   |L0H0L0H0|L0H0L0H0|L0H0L0H0|L0H0L0H0| : level 0
   |L1H0H1H0|L1H0H1H0|L1H0H1H0|L1H0H1H0| : level 1

 In this method, H/L and X0/X1 is always same position.
 This lead us to more speed and less memory.
 Of cause, the result of both method is quite same
 because it's only difference that coefficient position.
*/
static InlineX void WaveletLevel(int* data, int size, int l, int SkipPixel)
{
	int s, ofs;
	signed char* pX0;
	signed char* end;

	pX0 = (signed char*)data;
	s = (8<<l)*SkipPixel;
	end = pX0+(size>>(l+1))*s;
	s -= 2;
	ofs = (4<<l)*SkipPixel;
	while (pX0 < end) {
		Harr(pX0, pX0+ofs);
		pX0++;
		Harr(pX0, pX0+ofs);
		pX0++;
		Harr(pX0, pX0+ofs);
		pX0 += s;
	}
}
#define InvWaveletLevel(d,s,l,pix) WaveletLevel(d,s,l,pix)

#ifdef ZYWRLE_ENCODE
#  ifndef ZYWRLE_QUANTIZE
/* Type A:lower bit omitting of EZW style. */
static InlineX void FilterWaveletSquare(int* pBuf, int width, int height, int level, int l)
{
	int r, s;
	int x, y;
	int* pH;
	const unsigned int* pM;

	pM = &(zywrleParam[level-1][l]);
	s = 2<<l;
	for (r = 1; r < 4; r++) {
		pH   = pBuf;
		if (r & 0x01)
			pH +=  s>>1;
		if (r & 0x02)
			pH += (s>>1)*width;
		for (y = 0; y < height / s; y++) {
			for (x = 0; x < width / s; x++) {
				/*
				 these are same following code.
				     pH[x] = pH[x] / (~pM[x]+1) * (~pM[x]+1);
				     ( round pH[x] with pM[x] bit )
				 '&' operator isn't 'round' but is 'floor'.
				 So, we must offset when pH[x] is negative.
				*/
				if (((signed char*)pH)[0] & 0x80)
					((signed char*)pH)[0] += ~((signed char*)pM)[0];
				if (((signed char*)pH)[1] & 0x80)
					((signed char*)pH)[1] += ~((signed char*)pM)[1];
				if (((signed char*)pH)[2] & 0x80)
					((signed char*)pH)[2] += ~((signed char*)pM)[2];
				*pH &= *pM;
				pH += s;
			}
			pH += (s-1)*width;
		}
	}
}
#  else
/*
 Type B:Non liner quantization filter.

 Coefficients have Gaussian curve and smaller value which is
 large part of coefficients isn't more important than larger value.
 So, I use filter of Non liner quantize/dequantize table.
 In general, Non liner quantize formula is explained as following.

    y=f(x)   = sign(x)*round( ((abs(x)/(2^7))^ r   )* 2^(bo-1) )*2^(8-bo)
    x=f-1(y) = sign(y)*round( ((abs(y)/(2^7))^(1/r))* 2^(bi-1) )*2^(8-bi)
 ( r:power coefficient  bi:effective MSB in input  bo:effective MSB in output )

   r < 1.0 : Smaller value is more important than larger value.
   r > 1.0 : Larger value is more important than smaller value.
   r = 1.0 : Liner quantization which is same with EZW style.

 r = 0.75 is famous non liner quantization used in MP3 audio codec.
 In contrast to audio data, larger value is important in wavelet coefficients.
 So, I select r = 2.0 table( quantize is x^2, dequantize sqrt(x) ).

 As compared with EZW style liner quantization, this filter tended to be
 more sharp edge and be more compression rate but be more blocking noise and be less quality.
 Especially, the surface of graphic objects has distinguishable noise in middle quality mode.

 We need only quantized-dequantized(filtered) value rather than quantized value itself
 because all values are packed or palette-lized in later ZRLE section.
 This lead us not to need to modify client decoder when we change
 the filtering procedure in future.
 Client only decodes coefficients given by encoder.
*/
static InlineX void FilterWaveletSquare(int* pBuf, int width, int height, int level, int l)
{
	int r, s;
	int x, y;
	int* pH;
	const signed char** pM;

	pM = zywrleParam[level-1][l];
	s = 2<<l;
	for (r = 1; r < 4; r++) {
		pH   = pBuf;
		if (r & 0x01)
			pH +=  s>>1;
		if (r & 0x02)
			pH += (s>>1)*width;
		for (y = 0; y < height / s; y++) {
			for (x = 0; x < width / s; x++) {
				((signed char*)pH)[0] = pM[0][((unsigned char*)pH)[0]];
				((signed char*)pH)[1] = pM[1][((unsigned char*)pH)[1]];
				((signed char*)pH)[2] = pM[2][((unsigned char*)pH)[2]];
				pH += s;
			}
			pH += (s-1)*width;
		}
	}
}
#  endif

static InlineX void Wavelet(int* pBuf, int width, int height, int level)
{
	int l, s;
	int* pTop;
	int* pEnd;

	for (l = 0; l < level; l++) {
		pTop = pBuf;
		pEnd = pBuf+height*width;
		s = width<<l;
		while (pTop < pEnd) {
			WaveletLevel(pTop, width, l, 1);
			pTop += s;
		}
		pTop = pBuf;
		pEnd = pBuf+width;
		s = 1<<l;
		while (pTop < pEnd) {
			WaveletLevel(pTop, height,l, width);
			pTop += s;
		}
		FilterWaveletSquare(pBuf, width, height, level, l);
	}
}
#endif
#ifdef ZYWRLE_DECODE
static InlineX void InvWavelet(int* pBuf, int width, int height, int level)
{
	int l, s;
	int* pTop;
	int* pEnd;

	for (l = level - 1; l >= 0; l--) {
		pTop = pBuf;
		pEnd = pBuf+width;
		s = 1<<l;
		while (pTop < pEnd) {
			InvWaveletLevel(pTop, height,l, width);
			pTop += s;
		}
		pTop = pBuf;
		pEnd = pBuf+height*width;
		s = width<<l;
		while (pTop < pEnd) {
			InvWaveletLevel(pTop, width, l, 1);
			pTop += s;
		}
	}
}
#endif

/* Load/Save coefficients stuffs.
 Coefficients manages as 24 bits little-endian pixel. */
#define ZYWRLE_LOAD_COEFF(pSrc,R,G,B) { \
	R = ((signed char*)pSrc)[2];	\
	G = ((signed char*)pSrc)[1];	\
	B = ((signed char*)pSrc)[0];	\
}
#define ZYWRLE_SAVE_COEFF(pDst,R,G,B) { \
	((signed char*)pDst)[2] = (signed char)R;	\
	((signed char*)pDst)[1] = (signed char)G;	\
	((signed char*)pDst)[0] = (signed char)B;	\
}

/*
 RGB <=> YUV conversion stuffs.
 YUV coversion is explained as following formula in strict meaning:
   Y =  0.299R + 0.587G + 0.114B (   0<=Y<=255)
   U = -0.169R - 0.331G + 0.500B (-128<=U<=127)
   V =  0.500R - 0.419G - 0.081B (-128<=V<=127)

 I use simple conversion RCT(reversible color transform) which is described
 in JPEG-2000 specification.
   Y = (R + 2G + B)/4 (   0<=Y<=255)
   U = B-G (-256<=U<=255)
   V = R-G (-256<=V<=255)
*/
#define ROUND(x) (((x)<0)?0:(((x)>255)?255:(x)))
	/* RCT is N-bit RGB to N-bit Y and N+1-bit UV.
	 For make Same N-bit, UV is lossy.
	 More exact PLHarr, we reduce to odd range(-127<=x<=127). */
#define ZYWRLE_RGBYUV1(R,G,B,Y,U,V,ymask,uvmask) { \
	Y = (R+(G<<1)+B)>>2;	\
	U =  B-G;	\
	V =  R-G;	\
	Y -= 128;	\
	U >>= 1;	\
	V >>= 1;	\
	Y &= ymask;	\
	U &= uvmask;	\
	V &= uvmask;	\
	if (Y == -128)	\
		Y += (0xFFFFFFFF-ymask+1);	\
	if (U == -128)	\
		U += (0xFFFFFFFF-uvmask+1);	\
	if (V == -128)	\
		V += (0xFFFFFFFF-uvmask+1);	\
}
#define ZYWRLE_YUVRGB1(R,G,B,Y,U,V) { \
	Y += 128;	\
	U <<= 1;	\
	V <<= 1;	\
	G = Y-((U+V)>>2);	\
	B = U+G;	\
	R = V+G;	\
	G = ROUND(G);	\
	B = ROUND(B);	\
	R = ROUND(R);	\
}

/*
 coefficient packing/unpacking stuffs.
 Wavelet transform makes 4 sub coefficient image from 1 original image.

 model with pyramid decomposition:
   +------+------+
   |      |      |
   |  L   |  Hx  |
   |      |      |
   +------+------+
   |      |      |
   |  H   |  Hxy |
   |      |      |
   +------+------+

 So, we must transfer each sub images individually in strict meaning.
 But at least ZRLE meaning, following one decompositon image is same as
 avobe individual sub image. I use this format.
 (Strictly saying, transfer order is reverse(Hxy->Hy->Hx->L)
  for simplified procedure for any wavelet level.)

   +------+------+
   |      L      |
   +------+------+
   |      Hx     |
   +------+------+
   |      Hy     |
   +------+------+
   |      Hxy    |
   +------+------+
*/
#define INC_PTR(data) \
	data++;	\
	if( data-pData >= (w+uw) ){	\
		data += scanline-(w+uw);	\
		pData = data;	\
	}

#define ZYWRLE_TRANSFER_COEFF(pBuf,data,r,w,h,scanline,level,TRANS)	\
	pH = pBuf;	\
	s = 2<<level;	\
	if (r & 0x01)	\
		pH +=  s>>1;	\
	if (r & 0x02)	\
		pH += (s>>1)*w;	\
	pEnd = pH+h*w;	\
	while (pH < pEnd) {	\
		pLine = pH+w;	\
		while (pH < pLine) {	\
			TRANS	\
			INC_PTR(data)	\
			pH += s;	\
		}	\
		pH += (s-1)*w;	\
	}

#define ZYWRLE_PACK_COEFF(pBuf,data,r,width,height,scanline,level)	\
	ZYWRLE_TRANSFER_COEFF(pBuf,data,r,width,height,scanline,level,ZYWRLE_LOAD_COEFF(pH,R,G,B);ZYWRLE_SAVE_PIXEL(data,R,G,B);)

#define ZYWRLE_UNPACK_COEFF(pBuf,data,r,width,height,scanline,level)	\
	ZYWRLE_TRANSFER_COEFF(pBuf,data,r,width,height,scanline,level,ZYWRLE_LOAD_PIXEL(data,R,G,B);ZYWRLE_SAVE_COEFF(pH,R,G,B);)

#define ZYWRLE_SAVE_UNALIGN(data,TRANS)	\
	pTop = pBuf+w*h;	\
	pEnd = pBuf + (w+uw)*(h+uh);	\
	while (pTop < pEnd) {	\
		TRANS	\
		INC_PTR(data)	\
		pTop++;	\
	}

#define ZYWRLE_LOAD_UNALIGN(data,TRANS)	\
	pTop = pBuf+w*h;	\
	if (uw) {	\
		pData=         data + w;	\
		pEnd = (int*)(pData+ h*scanline);	\
		while (pData < (PIXEL_T*)pEnd) {	\
			pLine = (int*)(pData + uw);	\
			while (pData < (PIXEL_T*)pLine) {	\
				TRANS	\
				pData++;	\
				pTop++;	\
			}	\
			pData += scanline-uw;	\
		}	\
	}	\
	if (uh) {	\
		pData=         data +  h*scanline;	\
		pEnd = (int*)(pData+ uh*scanline);	\
		while (pData < (PIXEL_T*)pEnd) {	\
			pLine = (int*)(pData + w);	\
			while (pData < (PIXEL_T*)pLine) {	\
				TRANS	\
				pData++;	\
				pTop++;	\
			}	\
			pData += scanline-w;	\
		}	\
	}	\
	if (uw && uh) {	\
		pData=         data + w+ h*scanline;	\
		pEnd = (int*)(pData+   uh*scanline);	\
		while (pData < (PIXEL_T*)pEnd) {	\
			pLine = (int*)(pData + uw);	\
			while (pData < (PIXEL_T*)pLine) {	\
				TRANS	\
				pData++;	\
				pTop++;	\
			}	\
			pData += scanline-uw;	\
		}	\
	}

static InlineX void zywrleCalcSize(int* pW, int* pH, int level)
{
	*pW &= ~((1<<level)-1);
	*pH &= ~((1<<level)-1);
}

#endif /* ZYWRLE_ONCE */

#ifndef CPIXEL
#ifdef ZYWRLE_ENCODE
static InlineX void ZYWRLE_RGBYUV(int* pBuf, PIXEL_T* data, int width, int height, int scanline)
{
	int R, G, B;
	int Y, U, V;
	int* pLine;
	int* pEnd;
	pEnd = pBuf+height*width;
	while (pBuf < pEnd) {
		pLine = pBuf+width;
		while (pBuf < pLine) {
			ZYWRLE_LOAD_PIXEL(data,R,G,B);
			ZYWRLE_RGBYUV1(R,G,B,Y,U,V,ZYWRLE_YMASK,ZYWRLE_UVMASK);
			ZYWRLE_SAVE_COEFF(pBuf,V,Y,U);
			pBuf++;
			data++;
		}
		data += scanline-width;
	}
}
#endif
#ifdef ZYWRLE_DECODE
static InlineX void ZYWRLE_YUVRGB(int* pBuf, PIXEL_T* data, int width, int height, int scanline) {
	int R, G, B;
	int Y, U, V;
	int* pLine;
	int* pEnd;
	pEnd = pBuf+height*width;
	while (pBuf < pEnd) {
		pLine = pBuf+width;
		while (pBuf < pLine) {
			ZYWRLE_LOAD_COEFF(pBuf,V,Y,U);
			ZYWRLE_YUVRGB1(R,G,B,Y,U,V);
			ZYWRLE_SAVE_PIXEL(data,R,G,B);
			pBuf++;
			data++;
		}
		data += scanline-width;
	}
}
#endif

#ifdef ZYWRLE_ENCODE
PIXEL_T* ZYWRLE_ANALYZE(PIXEL_T* dst, PIXEL_T* src, int w, int h, int scanline, int level, int* pBuf) {
	int l;
	int uw = w;
	int uh = h;
	int* pTop;
	int* pEnd;
	int* pLine;
	PIXEL_T* pData;
	int R, G, B;
	int s;
	int* pH;

	zywrleCalcSize(&w, &h, level);
	if (w == 0 || h == 0)
		return NULL;
	uw -= w;
	uh -= h;

	pData = dst;
	ZYWRLE_LOAD_UNALIGN(src,*(PIXEL_T*)pTop=*pData;)
	ZYWRLE_RGBYUV(pBuf, src, w, h, scanline);
	Wavelet(pBuf, w, h, level);
	for (l = 0; l < level; l++) {
		ZYWRLE_PACK_COEFF(pBuf, dst, 3, w, h, scanline, l);
		ZYWRLE_PACK_COEFF(pBuf, dst, 2, w, h, scanline, l);
		ZYWRLE_PACK_COEFF(pBuf, dst, 1, w, h, scanline, l);
		if (l == level - 1) {
			ZYWRLE_PACK_COEFF(pBuf, dst, 0, w, h, scanline, l);
		}
	}
	ZYWRLE_SAVE_UNALIGN(dst,*dst=*(PIXEL_T*)pTop;)
	return dst;
}
#endif
#ifdef ZYWRLE_DECODE
PIXEL_T* ZYWRLE_SYNTHESIZE(PIXEL_T* dst, PIXEL_T* src, int w, int h, int scanline, int level, int* pBuf)
{
	int l;
	int uw = w;
	int uh = h;
	int* pTop;
	int* pEnd;
	int* pLine;
	PIXEL_T* pData;
	int R, G, B;
	int s;
	int* pH;

	zywrleCalcSize(&w, &h, level);
	if (w == 0 || h == 0)
		return NULL;
	uw -= w;
	uh -= h;

	pData = src;
	for (l = 0; l < level; l++) {
		ZYWRLE_UNPACK_COEFF(pBuf, src, 3, w, h, scanline, l);
		ZYWRLE_UNPACK_COEFF(pBuf, src, 2, w, h, scanline, l);
		ZYWRLE_UNPACK_COEFF(pBuf, src, 1, w, h, scanline, l);
		if (l == level - 1) {
			ZYWRLE_UNPACK_COEFF(pBuf, src, 0, w, h, scanline, l);
		}
	}
	ZYWRLE_SAVE_UNALIGN(src,*(PIXEL_T*)pTop=*src;)
	InvWavelet(pBuf, w, h, level);
	ZYWRLE_YUVRGB(pBuf, dst, w, h, scanline);
	ZYWRLE_LOAD_UNALIGN(dst,*pData=*(PIXEL_T*)pTop;)
	return src;
}
#endif
#endif  /* CPIXEL */

#undef ZYWRLE_RGBYUV
#undef ZYWRLE_YUVRGB
#undef ZYWRLE_LOAD_PIXEL
#undef ZYWRLE_SAVE_PIXEL
OpenPOWER on IntegriCloud