Compute fast inverse wavelet transform of all 4 subbands of given level and stores result in LL subband of level - 1.
246 ASSERT(srcLevel > 0 && srcLevel <
m_nLevels);
247 const int destLevel = srcLevel - 1;
250 UINT32 width, height;
253 if (!destBand->
AllocMemory())
return InsufficientMemory;
254 DataT *dest = destBand->
GetBuffer(), *origin = dest, *row0, *row1, *row2, *row3;
256 #ifdef __PGFROISUPPORT__ 257 PGFRect destROI = destBand->GetROI();
258 width = destROI.
Width();
259 height = destROI.
Height();
260 const UINT32 destWidth = width;
261 const UINT32 destHeight = height;
264 if (destROI.
top & 1) {
269 if (destROI.
left & 1) {
276 const UINT32 leftD = destROI.
left >> 1;
277 const UINT32 left0 =
m_subband[srcLevel][
LL].GetROI().left;
278 const UINT32 left1 =
m_subband[srcLevel][
HL].GetROI().left;
279 const UINT32 topD = destROI.
top >> 1;
280 const UINT32 top0 =
m_subband[srcLevel][
LL].GetROI().top;
281 const UINT32 top1 =
m_subband[srcLevel][
LH].GetROI().top;
282 ASSERT(
m_subband[srcLevel][
LH].GetROI().left == left0);
283 ASSERT(
m_subband[srcLevel][
HH].GetROI().left == left1);
284 ASSERT(
m_subband[srcLevel][
HL].GetROI().top == top0);
285 ASSERT(
m_subband[srcLevel][
HH].GetROI().top == top1);
287 UINT32 srcOffsetX[2] = { 0, 0 };
288 UINT32 srcOffsetY[2] = { 0, 0 };
290 if (leftD >=
__max(left0, left1)) {
291 srcOffsetX[0] = leftD - left0;
292 srcOffsetX[1] = leftD - left1;
294 if (left0 <= left1) {
295 const UINT32 dx = (left1 - leftD) << 1;
299 srcOffsetX[0] = left1 - left0;
301 const UINT32 dx = (left0 - leftD) << 1;
305 srcOffsetX[1] = left0 - left1;
308 if (topD >=
__max(top0, top1)) {
309 srcOffsetY[0] = topD - top0;
310 srcOffsetY[1] = topD - top1;
313 const UINT32 dy = (top1 - topD) << 1;
315 origin += dy*destWidth;
317 srcOffsetY[0] = top1 - top0;
319 const UINT32 dy = (top0 - topD) << 1;
321 origin += dy*destWidth;
323 srcOffsetY[1] = top0 - top1;
335 PGFRect destROI(0, 0, width, height);
336 const UINT32 destWidth = width;
337 const UINT32 destHeight = height;
347 row0 = origin; row1 = row0 + destWidth;
349 for (UINT32 k=0; k < width; k++) {
350 row0[k] -= ((row1[k] +
c1) >> 1);
354 row2 = row1 + destWidth; row3 = row2 + destWidth;
355 for (UINT32 i=destROI.
top + 2; i < destROI.
bottom - 1; i += 2) {
357 for (UINT32 k=0; k < width; k++) {
358 row2[k] -= ((row1[k] + row3[k] +
c2) >> 2);
359 row1[k] += ((row0[k] + row2[k] +
c1) >> 1);
363 row0 = row2; row1 = row3; row2 = row1 + destWidth; row3 = row2 + destWidth;
369 for (UINT32 k=0; k < width; k++) {
370 row2[k] -= ((row1[k] +
c1) >> 1);
371 row1[k] += ((row0[k] + row2[k] +
c1) >> 1);
376 row0 = row1; row1 = row2; row2 += destWidth;
378 for (UINT32 k=0; k < width; k++) {
383 row0 = row1; row1 += destWidth;
387 row0 = origin; row1 = row0 + destWidth;
389 for (UINT32 k=0; k < height; k += 2) {
393 row0 += destWidth << 1; row1 += destWidth << 1;
void FreeMemory()
Delete the memory buffer of this subband.
#define NSubbands
number of subbands per level