libpgf: WaveletTransform.cpp Source File

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WaveletTransform.cpp
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1/*
2 * The Progressive Graphics File; http://www.libpgf.org
3 *
4 * $Date: 2006-05-18 16:03:32 +0200 (Do, 18 Mai 2006) $
5 * $Revision: 194 $
6 *
7 * This file Copyright (C) 2006 xeraina GmbH, Switzerland
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU LESSER GENERAL PUBLIC LICENSE
11 * as published by the Free Software Foundation; either version 2.1
12 * of the License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
28
29#include "WaveletTransform.h"
30
31#define c1 1 // best value 1
32#define c2 2 // best value 2
33
35// Constructor: Constructs a wavelet transform pyramid of given size and levels.
36// @param width The width of the original image (at level 0) in pixels
37// @param height The height of the original image (at level 0) in pixels
38// @param levels The number of levels (>= 0)
39// @param data Input data of subband LL at level 0
40CWaveletTransform::CWaveletTransform(UINT32 width, UINT32 height, int levels, DataT* data)
41: m_nLevels(levels + 1) // m_nLevels in CPGFImage determines the number of FWT steps; this.m_nLevels determines the number subband-planes
42, m_subband(nullptr)
43#ifdef __PGFROISUPPORT__
44, m_indices(nullptr)
45#endif
46{
47 ASSERT(m_nLevels > 0 && m_nLevels <= MaxLevel + 1);
48 InitSubbands(width, height, data);
49}
50
52// Initialize size subbands on all levels
53 void CWaveletTransform::InitSubbands(UINT32 width, UINT32 height, DataT* data) {
54 if (m_subband) Destroy();
55
56 // create subbands
57 m_subband = new CSubband[m_nLevels][NSubbands];
58
59 // init subbands
60 UINT32 loWidth = width;
61 UINT32 hiWidth = width;
62 UINT32 loHeight = height;
63 UINT32 hiHeight = height;
64
65 for (int level = 0; level < m_nLevels; level++) {
66 m_subband[level][LL].Initialize(loWidth, loHeight, level, LL); // LL
67 m_subband[level][HL].Initialize(hiWidth, loHeight, level, HL); // HL
68 m_subband[level][LH].Initialize(loWidth, hiHeight, level, LH); // LH
69 m_subband[level][HH].Initialize(hiWidth, hiHeight, level, HH); // HH
70 hiWidth = loWidth >> 1; hiHeight = loHeight >> 1;
71 loWidth = (loWidth + 1) >> 1; loHeight = (loHeight + 1) >> 1;
72 }
73 if (data) {
74 m_subband[0][LL].SetBuffer(data);
75 }
76}
77
79// Compute fast forward wavelet transform of LL subband at given level and
80// stores result in all 4 subbands of level + 1.
81// Wavelet transform used in writing a PGF file
82// Forward Transform of srcBand and split and store it into subbands on destLevel
83// low pass filter at even positions: 1/8[-1, 2, (6), 2, -1]
84// high pass filter at odd positions: 1/4[-2, (4), -2]
85// @param level A wavelet transform pyramid level (>= 0 && < Levels())
86// @param quant A quantization value (linear scalar quantization)
87// @return error in case of a memory allocation problem
88OSError CWaveletTransform::ForwardTransform(int level, int quant) {
89 ASSERT(level >= 0 && level < m_nLevels - 1);
90 const int destLevel = level + 1;
91 ASSERT(m_subband[destLevel]);
92 CSubband* srcBand = &m_subband[level][LL]; ASSERT(srcBand);
93 const UINT32 width = srcBand->GetWidth();
94 const UINT32 height = srcBand->GetHeight();
95 DataT* src = srcBand->GetBuffer(); ASSERT(src);
96 DataT *row0, *row1, *row2, *row3;
97
98 // Allocate memory for next transform level
99 for (int i=0; i < NSubbands; i++) {
100 if (!m_subband[destLevel][i].AllocMemory()) return InsufficientMemory;
101 }
102
103 if (height >= FilterSize) { // changed from FilterSizeH to FilterSize
104 // top border handling
105 row0 = src; row1 = row0 + width; row2 = row1 + width;
106 ForwardRow(row0, width);
107 ForwardRow(row1, width);
108 ForwardRow(row2, width);
109 for (UINT32 k=0; k < width; k++) {
110 row1[k] -= ((row0[k] + row2[k] + c1) >> 1); // high pass
111 row0[k] += ((row1[k] + c1) >> 1); // low pass
112 }
113 InterleavedToSubbands(destLevel, row0, row1, width);
114 row0 = row1; row1 = row2; row2 += width; row3 = row2 + width;
115
116 // middle part
117 for (UINT32 i=3; i < height-1; i += 2) {
118 ForwardRow(row2, width);
119 ForwardRow(row3, width);
120 for (UINT32 k=0; k < width; k++) {
121 row2[k] -= ((row1[k] + row3[k] + c1) >> 1); // high pass filter
122 row1[k] += ((row0[k] + row2[k] + c2) >> 2); // low pass filter
123 }
124 InterleavedToSubbands(destLevel, row1, row2, width);
125 row0 = row2; row1 = row3; row2 = row3 + width; row3 = row2 + width;
126 }
127
128 // bottom border handling
129 if (height & 1) {
130 for (UINT32 k=0; k < width; k++) {
131 row1[k] += ((row0[k] + c1) >> 1); // low pass
132 }
133 InterleavedToSubbands(destLevel, row1, nullptr, width);
134 row0 = row1; row1 += width;
135 } else {
136 ForwardRow(row2, width);
137 for (UINT32 k=0; k < width; k++) {
138 row2[k] -= row1[k]; // high pass
139 row1[k] += ((row0[k] + row2[k] + c2) >> 2); // low pass
140 }
141 InterleavedToSubbands(destLevel, row1, row2, width);
142 row0 = row1; row1 = row2; row2 += width;
143 }
144 } else {
145 // if height is too small
146 row0 = src; row1 = row0 + width;
147 // first part
148 for (UINT32 k=0; k < height; k += 2) {
149 ForwardRow(row0, width);
150 ForwardRow(row1, width);
151 InterleavedToSubbands(destLevel, row0, row1, width);
152 row0 += width << 1; row1 += width << 1;
153 }
154 // bottom
155 if (height & 1) {
156 InterleavedToSubbands(destLevel, row0, nullptr, width);
157 }
158 }
159
160 if (quant > 0) {
161 // subband quantization (without LL)
162 for (int i=1; i < NSubbands; i++) {
163 m_subband[destLevel][i].Quantize(quant);
164 }
165 // LL subband quantization
166 if (destLevel == m_nLevels - 1) {
167 m_subband[destLevel][LL].Quantize(quant);
168 }
169 }
170
171 // free source band
172 srcBand->FreeMemory();
173 return NoError;
174}
175
177// Forward transform one row
178// low pass filter at even positions: 1/8[-1, 2, (6), 2, -1]
179// high pass filter at odd positions: 1/4[-2, (4), -2]
180 void CWaveletTransform::ForwardRow(DataT* src, UINT32 width) {
181 if (width >= FilterSize) {
182 UINT32 i = 3;
183
184 // left border handling
185 src[1] -= ((src[0] + src[2] + c1) >> 1); // high pass
186 src[0] += ((src[1] + c1) >> 1); // low pass
187
188 // middle part
189 for (; i < width-1; i += 2) {
190 src[i] -= ((src[i-1] + src[i+1] + c1) >> 1); // high pass
191 src[i-1] += ((src[i-2] + src[i] + c2) >> 2); // low pass
192 }
193
194 // right border handling
195 if (width & 1) {
196 src[i-1] += ((src[i-2] + c1) >> 1); // low pass
197 } else {
198 src[i] -= src[i-1]; // high pass
199 src[i-1] += ((src[i-2] + src[i] + c2) >> 2); // low pass
200 }
201 }
202}
203
205// Copy transformed and interleaved (L,H,L,H,...) rows loRow and hiRow to subbands LL,HL,LH,HH
206 void CWaveletTransform::InterleavedToSubbands(int destLevel, DataT* loRow, DataT* hiRow, UINT32 width) {
207 const UINT32 wquot = width >> 1;
208 const bool wrem = (width & 1);
209 CSubband &ll = m_subband[destLevel][LL], &hl = m_subband[destLevel][HL];
210 CSubband &lh = m_subband[destLevel][LH], &hh = m_subband[destLevel][HH];
211
212 if (hiRow) {
213 for (UINT32 i=0; i < wquot; i++) {
214 ll.WriteBuffer(*loRow++); // first access, than increment
215 hl.WriteBuffer(*loRow++);
216 lh.WriteBuffer(*hiRow++); // first access, than increment
217 hh.WriteBuffer(*hiRow++);
218 }
219 if (wrem) {
220 ll.WriteBuffer(*loRow);
221 lh.WriteBuffer(*hiRow);
222 }
223 } else {
224 for (UINT32 i=0; i < wquot; i++) {
225 ll.WriteBuffer(*loRow++); // first access, than increment
226 hl.WriteBuffer(*loRow++);
227 }
228 if (wrem) ll.WriteBuffer(*loRow);
229 }
230}
231
233// Compute fast inverse wavelet transform of all 4 subbands of given level and
234// stores result in LL subband of level - 1.
235// Inverse wavelet transform used in reading a PGF file
236// Inverse Transform srcLevel and combine to destBand
237// low-pass coefficients at even positions, high-pass coefficients at odd positions
238// inverse filter for even positions: 1/4[-1, (4), -1]
239// inverse filter for odd positions: 1/8[-1, 4, (6), 4, -1]
240// @param srcLevel A wavelet transform pyramid level (> 0 && <= Levels())
241// @param w [out] A pointer to the returned width of subband LL (in pixels)
242// @param h [out] A pointer to the returned height of subband LL (in pixels)
243// @param data [out] A pointer to the returned array of image data
244// @return error in case of a memory allocation problem
245OSError CWaveletTransform::InverseTransform(int srcLevel, UINT32* w, UINT32* h, DataT** data) {
246 ASSERT(srcLevel > 0 && srcLevel < m_nLevels);
247 const int destLevel = srcLevel - 1;
248 ASSERT(m_subband[destLevel]);
249 CSubband* destBand = &m_subband[destLevel][LL];
250 UINT32 width, height;
251
252 // allocate memory for the results of the inverse transform
253 if (!destBand->AllocMemory()) return InsufficientMemory;
254 DataT *origin = destBand->GetBuffer(), *row0, *row1, *row2, *row3;
255
256#ifdef __PGFROISUPPORT__
257 PGFRect destROI = destBand->GetAlignedROI();
258 const UINT32 destWidth = destROI.Width(); // destination buffer width
259 const UINT32 destHeight = destROI.Height(); // destination buffer height
260 width = destWidth; // destination working width
261 height = destHeight; // destination working height
262
263 // update destination ROI
264 if (destROI.top & 1) {
265 destROI.top++;
266 origin += destWidth;
267 height--;
268 }
269 if (destROI.left & 1) {
270 destROI.left++;
271 origin++;
272 width--;
273 }
274
275 // init source buffer position
276 const UINT32 leftD = destROI.left >> 1;
277 const UINT32 left0 = m_subband[srcLevel][LL].GetAlignedROI().left;
278 const UINT32 left1 = m_subband[srcLevel][HL].GetAlignedROI().left;
279 const UINT32 topD = destROI.top >> 1;
280 const UINT32 top0 = m_subband[srcLevel][LL].GetAlignedROI().top;
281 const UINT32 top1 = m_subband[srcLevel][LH].GetAlignedROI().top;
282 ASSERT(m_subband[srcLevel][LH].GetAlignedROI().left == left0);
283 ASSERT(m_subband[srcLevel][HH].GetAlignedROI().left == left1);
284 ASSERT(m_subband[srcLevel][HL].GetAlignedROI().top == top0);
285 ASSERT(m_subband[srcLevel][HH].GetAlignedROI().top == top1);
286
287 UINT32 srcOffsetX[2] = { 0, 0 };
288 UINT32 srcOffsetY[2] = { 0, 0 };
289
290 if (leftD >= __max(left0, left1)) {
291 srcOffsetX[0] = leftD - left0;
292 srcOffsetX[1] = leftD - left1;
293 } else {
294 if (left0 <= left1) {
295 const UINT32 dx = (left1 - leftD) << 1;
296 destROI.left += dx;
297 origin += dx;
298 width -= dx;
299 srcOffsetX[0] = left1 - left0;
300 } else {
301 const UINT32 dx = (left0 - leftD) << 1;
302 destROI.left += dx;
303 origin += dx;
304 width -= dx;
305 srcOffsetX[1] = left0 - left1;
306 }
307 }
308 if (topD >= __max(top0, top1)) {
309 srcOffsetY[0] = topD - top0;
310 srcOffsetY[1] = topD - top1;
311 } else {
312 if (top0 <= top1) {
313 const UINT32 dy = (top1 - topD) << 1;
314 destROI.top += dy;
315 origin += dy*destWidth;
316 height -= dy;
317 srcOffsetY[0] = top1 - top0;
318 } else {
319 const UINT32 dy = (top0 - topD) << 1;
320 destROI.top += dy;
321 origin += dy*destWidth;
322 height -= dy;
323 srcOffsetY[1] = top0 - top1;
324 }
325 }
326
327 m_subband[srcLevel][LL].InitBuffPos(srcOffsetX[0], srcOffsetY[0]);
328 m_subband[srcLevel][HL].InitBuffPos(srcOffsetX[1], srcOffsetY[0]);
329 m_subband[srcLevel][LH].InitBuffPos(srcOffsetX[0], srcOffsetY[1]);
330 m_subband[srcLevel][HH].InitBuffPos(srcOffsetX[1], srcOffsetY[1]);
331
332#else
333 width = destBand->GetWidth();
334 height = destBand->GetHeight();
335 PGFRect destROI(0, 0, width, height);
336 const UINT32 destWidth = width; // destination buffer width
337 const UINT32 destHeight = height; // destination buffer height
338
339 // init source buffer position
340 for (int i = 0; i < NSubbands; i++) {
341 m_subband[srcLevel][i].InitBuffPos();
342 }
343#endif
344
345 if (destHeight >= FilterSize) { // changed from FilterSizeH to FilterSize
346 // top border handling
347 row0 = origin; row1 = row0 + destWidth;
348 SubbandsToInterleaved(srcLevel, row0, row1, width);
349 for (UINT32 k = 0; k < width; k++) {
350 row0[k] -= ((row1[k] + c1) >> 1); // even
351 }
352
353 // middle part
354 row2 = row1 + destWidth; row3 = row2 + destWidth;
355 for (UINT32 i = destROI.top + 2; i < destROI.bottom - 1; i += 2) {
356 SubbandsToInterleaved(srcLevel, row2, row3, width);
357 for (UINT32 k = 0; k < width; k++) {
358 row2[k] -= ((row1[k] + row3[k] + c2) >> 2); // even
359 row1[k] += ((row0[k] + row2[k] + c1) >> 1); // odd
360 }
361 InverseRow(row0, width);
362 InverseRow(row1, width);
363 row0 = row2; row1 = row3; row2 = row1 + destWidth; row3 = row2 + destWidth;
364 }
365
366 // bottom border handling
367 if (height & 1) {
368 SubbandsToInterleaved(srcLevel, row2, nullptr, width);
369 for (UINT32 k = 0; k < width; k++) {
370 row2[k] -= ((row1[k] + c1) >> 1); // even
371 row1[k] += ((row0[k] + row2[k] + c1) >> 1); // odd
372 }
373 InverseRow(row0, width);
374 InverseRow(row1, width);
375 InverseRow(row2, width);
376 row0 = row1; row1 = row2; row2 += destWidth;
377 } else {
378 for (UINT32 k = 0; k < width; k++) {
379 row1[k] += row0[k];
380 }
381 InverseRow(row0, width);
382 InverseRow(row1, width);
383 row0 = row1; row1 += destWidth;
384 }
385 } else {
386 // height is too small
387 row0 = origin; row1 = row0 + destWidth;
388 // first part
389 for (UINT32 k = 0; k < height; k += 2) {
390 SubbandsToInterleaved(srcLevel, row0, row1, width);
391 InverseRow(row0, width);
392 InverseRow(row1, width);
393 row0 += destWidth << 1; row1 += destWidth << 1;
394 }
395 // bottom
396 if (height & 1) {
397 SubbandsToInterleaved(srcLevel, row0, nullptr, width);
398 InverseRow(row0, width);
399 }
400 }
401
402 // free memory of the current srcLevel
403 for (int i = 0; i < NSubbands; i++) {
404 m_subband[srcLevel][i].FreeMemory();
405 }
406
407 // return info
408 *w = destWidth;
409 *h = destHeight;
410 *data = destBand->GetBuffer();
411 return NoError;
412}
413
415// Inverse Wavelet Transform of one row
416// low-pass coefficients at even positions, high-pass coefficients at odd positions
417// inverse filter for even positions: 1/4[-1, (4), -1]
418// inverse filter for odd positions: 1/8[-1, 4, (6), 4, -1]
419 void CWaveletTransform::InverseRow(DataT* dest, UINT32 width) {
420 if (width >= FilterSize) {
421 UINT32 i = 2;
422
423 // left border handling
424 dest[0] -= ((dest[1] + c1) >> 1); // even
425
426 // middle part
427 for (; i < width - 1; i += 2) {
428 dest[i] -= ((dest[i-1] + dest[i+1] + c2) >> 2); // even
429 dest[i-1] += ((dest[i-2] + dest[i] + c1) >> 1); // odd
430 }
431
432 // right border handling
433 if (width & 1) {
434 dest[i] -= ((dest[i-1] + c1) >> 1); // even
435 dest[i-1] += ((dest[i-2] + dest[i] + c1) >> 1); // odd
436 } else {
437 dest[i-1] += dest[i-2]; // odd
438 }
439 }
440}
441
443// Copy transformed coefficients from subbands LL,HL,LH,HH to interleaved format (L,H,L,H,...)
444 void CWaveletTransform::SubbandsToInterleaved(int srcLevel, DataT* loRow, DataT* hiRow, UINT32 width) {
445 const UINT32 wquot = width >> 1;
446 const bool wrem = (width & 1);
447 CSubband &ll = m_subband[srcLevel][LL], &hl = m_subband[srcLevel][HL];
448 CSubband &lh = m_subband[srcLevel][LH], &hh = m_subband[srcLevel][HH];
449
450 if (hiRow) {
451 #ifdef __PGFROISUPPORT__
452 const bool storePos = wquot < ll.BufferWidth();
453 UINT32 llPos = 0, hlPos = 0, lhPos = 0, hhPos = 0;
454
455 if (storePos) {
456 // save current src buffer positions
457 llPos = ll.GetBuffPos();
458 hlPos = hl.GetBuffPos();
459 lhPos = lh.GetBuffPos();
460 hhPos = hh.GetBuffPos();
461 }
462 #endif
463
464 for (UINT32 i=0; i < wquot; i++) {
465 *loRow++ = ll.ReadBuffer();// first access, than increment
466 *loRow++ = hl.ReadBuffer();// first access, than increment
467 *hiRow++ = lh.ReadBuffer();// first access, than increment
468 *hiRow++ = hh.ReadBuffer();// first access, than increment
469 }
470
471 if (wrem) {
472 *loRow++ = ll.ReadBuffer();// first access, than increment
473 *hiRow++ = lh.ReadBuffer();// first access, than increment
474 }
475
476 #ifdef __PGFROISUPPORT__
477 if (storePos) {
478 // increment src buffer positions
479 ll.IncBuffRow(llPos);
480 hl.IncBuffRow(hlPos);
481 lh.IncBuffRow(lhPos);
482 hh.IncBuffRow(hhPos);
483 }
484 #endif
485
486 } else {
487 #ifdef __PGFROISUPPORT__
488 const bool storePos = wquot < ll.BufferWidth();
489 UINT32 llPos = 0, hlPos = 0;
490
491 if (storePos) {
492 // save current src buffer positions
493 llPos = ll.GetBuffPos();
494 hlPos = hl.GetBuffPos();
495 }
496 #endif
497
498 for (UINT32 i=0; i < wquot; i++) {
499 *loRow++ = ll.ReadBuffer();// first access, than increment
500 *loRow++ = hl.ReadBuffer();// first access, than increment
501 }
502 if (wrem) *loRow++ = ll.ReadBuffer();
503
504 #ifdef __PGFROISUPPORT__
505 if (storePos) {
506 // increment src buffer positions
507 ll.IncBuffRow(llPos);
508 hl.IncBuffRow(hlPos);
509 }
510 #endif
511 }
512}
513
514#ifdef __PGFROISUPPORT__
518void CWaveletTransform::SetROI(PGFRect roi) {
519 const UINT32 delta = (FilterSize >> 1) << m_nLevels;
520
521 // create tile indices
522 delete[] m_indices;
523 m_indices = new PGFRect[m_nLevels];
524
525 // enlarge rect: add margin
526 roi.left = (roi.left > delta) ? roi.left - delta : 0;
527 roi.top = (roi.top > delta) ? roi.top - delta : 0;
528 roi.right += delta;
529 roi.bottom += delta;
530
531 for (int l = 0; l < m_nLevels; l++) {
532 PGFRect alignedROI;
533 PGFRect& indices = m_indices[l];
534 UINT32 nTiles = GetNofTiles(l);
535 CSubband& subband = m_subband[l][LL];
536
537 // use roi to determine the necessary tile indices (for all subbands the same) and aligned ROI for LL subband
538 subband.SetNTiles(nTiles); // must be called before TileIndex()
539 subband.TileIndex(true, roi.left, roi.top, indices.left, indices.top, alignedROI.left, alignedROI.top);
540 subband.TileIndex(false, roi.right, roi.bottom, indices.right, indices.bottom, alignedROI.right, alignedROI.bottom);
541 subband.SetAlignedROI(alignedROI);
542 ASSERT(l == 0 ||
543 (m_indices[l-1].left >= 2*m_indices[l].left &&
544 m_indices[l-1].top >= 2*m_indices[l].top &&
545 m_indices[l-1].right <= 2*m_indices[l].right &&
546 m_indices[l-1].bottom <= 2*m_indices[l].bottom));
547
548 // determine aligned ROI of other three subbands
549 PGFRect aroi;
550 UINT32 w, h;
551 for (int b = 1; b < NSubbands; b++) {
552 CSubband& sb = m_subband[l][b];
553 sb.SetNTiles(nTiles); // must be called before TilePosition()
554 sb.TilePosition(indices.left, indices.top, aroi.left, aroi.top, w, h);
555 sb.TilePosition(indices.right - 1, indices.bottom - 1, aroi.right, aroi.bottom, w, h);
556 aroi.right += w;
557 aroi.bottom += h;
558 sb.SetAlignedROI(aroi);
559 }
560
561 // use aligned ROI of LL subband for next level
562 roi.left = alignedROI.left >> 1;
563 roi.top = alignedROI.top >> 1;
564 roi.right = (alignedROI.right + 1) >> 1;
565 roi.bottom = (alignedROI.bottom + 1) >> 1;
566 }
567}
568
569#endif // __PGFROISUPPORT__
__PGFROISUPPORT__
#define __PGFROISUPPORT__
Definition PGFplatform.h:60
__max
#define __max(x, y)
Definition PGFplatform.h:92
NSubbands
#define NSubbands
number of subbands per level
Definition PGFtypes.h:63
MaxLevel
#define MaxLevel
maximum number of transform levels
Definition PGFtypes.h:62
LL
@ LL
Definition PGFtypes.h:99
HL
@ HL
Definition PGFtypes.h:99
LH
@ LH
Definition PGFtypes.h:99
HH
@ HH
Definition PGFtypes.h:99
DataT
INT32 DataT
Definition PGFtypes.h:269
c2
#define c2
Definition WaveletTransform.cpp:32
c1
#define c1
Definition WaveletTransform.cpp:31
WaveletTransform.h
PGF wavelet transform class.
FilterSize
const UINT32 FilterSize
Definition WaveletTransform.h:39
CSubband
Wavelet channel class.
Definition Subband.h:42
CSubband::GetBuffer
DataT * GetBuffer()
Definition Subband.h:107
CSubband::AllocMemory
bool AllocMemory()
Definition Subband.cpp:77
CSubband::WriteBuffer
void WriteBuffer(DataT val)
Definition Subband.h:147
CSubband::GetWidth
int GetWidth() const
Definition Subband.h:128
CSubband::FreeMemory
void FreeMemory()
Delete the memory buffer of this subband.
Definition Subband.cpp:101
CSubband::GetBuffPos
UINT32 GetBuffPos() const
Definition Subband.h:151
CSubband::GetHeight
int GetHeight() const
Definition Subband.h:123
CSubband::ReadBuffer
DataT ReadBuffer()
Definition Subband.h:149
CWaveletTransform::m_subband
CSubband(* m_subband)[NSubbands]
quadtree of subbands: LL HL LH HH
Definition WaveletTransform.h:142
CWaveletTransform::InverseRow
void InverseRow(DataT *buff, UINT32 width)
Definition WaveletTransform.cpp:419
CWaveletTransform::InverseTransform
OSError InverseTransform(int level, UINT32 *width, UINT32 *height, DataT **data)
Definition WaveletTransform.cpp:245
CWaveletTransform::SubbandsToInterleaved
void SubbandsToInterleaved(int srcLevel, DataT *loRow, DataT *hiRow, UINT32 width)
Definition WaveletTransform.cpp:444
CWaveletTransform::InitSubbands
void InitSubbands(UINT32 width, UINT32 height, DataT *data)
Definition WaveletTransform.cpp:53
CWaveletTransform::ForwardTransform
OSError ForwardTransform(int level, int quant)
Definition WaveletTransform.cpp:88
CWaveletTransform::Destroy
void Destroy()
Definition WaveletTransform.h:125
CWaveletTransform::ForwardRow
void ForwardRow(DataT *buff, UINT32 width)
Definition WaveletTransform.cpp:180
CWaveletTransform::InterleavedToSubbands
void InterleavedToSubbands(int destLevel, DataT *loRow, DataT *hiRow, UINT32 width)
Definition WaveletTransform.cpp:206
CWaveletTransform::CWaveletTransform
CWaveletTransform(UINT32 width, UINT32 height, int levels, DataT *data=nullptr)
Definition WaveletTransform.cpp:40
CWaveletTransform::CSubband
friend class CSubband
Definition WaveletTransform.h:56
CWaveletTransform::m_nLevels
int m_nLevels
number of LL levels: one more than header.nLevels in PGFimage
Definition WaveletTransform.h:141
PGFRect
Rectangle.
Definition PGFtypes.h:225
PGFRect::Height
UINT32 Height() const
Definition PGFtypes.h:259
PGFRect::Width
UINT32 Width() const
Definition PGFtypes.h:256
PGFRect::top
UINT32 top
Definition PGFtypes.h:226
PGFRect::bottom
UINT32 bottom
Definition PGFtypes.h:226
PGFRect::right
UINT32 right
Definition PGFtypes.h:226
PGFRect::left
UINT32 left
Definition PGFtypes.h:226