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FillBuffer

void Impala::Core::VideoSet::KfrMotionExtractor::FillBuffer ( int  WindowLen, int  bWidth, int  bHeight, BYTE *  mvseq   ) [inline] Definition at line 698 of file KfrMotionExtractor.h. References Impala::Core::Array::Add(), BYTE, DumpEnergyMap(), IsInShot, m_Buffer, m_EnergyBuffer, m_EnergyMap, m_verbose2, MVBLOCKSIZE, and UINT. Referenced by ComputeEnergy(). { double * Add = new double[bWidth * bHeight]; if (IsInShot) { UINT BufferLen = bWidth * bHeight; double * Temp = new double[BufferLen]; if (Temp == NULL || Add == NULL) { if (Temp != NULL) delete[] Temp; if (Add != NULL) delete[] Add; printf("Not Enough Memory! No Map Generated!"); return; } // Initialize the map value to 1.0 for (int i = 0; i < BufferLen; i++) { m_EnergyMap[i] = 1.0; Add[i] = 0.0; } //DumpEnergyMap(bWidth, bHeight, "Initialization"); for (int w = 0; w < WindowLen; w ++) { memset(Temp, 0, BufferLen * sizeof(double)); // read the motion vectors from the "mvseq" buffer memcpy(m_Buffer, mvseq + sizeof(BYTE)*bWidth*bHeight*2* w, BufferLen * 2); // loop for the energy map :(20*15, for example) for (int i = 0; i < bWidth; i++) for (int j = 0; j < bHeight; j++) { double CurValue = m_EnergyMap[j * bWidth + i]; int cx, cy; long Ptr = 2 * (j * bWidth + i); // (cx,cy) is the motion vector cx = (char)m_Buffer[Ptr]; cy = (char)m_Buffer[Ptr + 1]; char SignX, SignY; SignX = (cx >= 0)? 1:-1; SignY = (cy >= 0)? 1:-1; int BaseX,BaseY; BaseX = i + (int)(cx / MVBLOCKSIZE); BaseY = j + (int)(cy / MVBLOCKSIZE); double Factor; if (BaseX >= bWidth || BaseY >= bHeight || BaseX < 0 || BaseY < 0) { if (abs(cx) >= abs(cy)) { Factor = (double)(cy) / (double)(cx); cx = ((SignX > 0)?bWidth:0) * MVBLOCKSIZE - MVBLOCKSIZE / 2; cy = Factor * cx + j * MVBLOCKSIZE - Factor * i * MVBLOCKSIZE; if (cy <= -MVBLOCKSIZE || cy >= bHeight * MVBLOCKSIZE) { cy = ((SignY > 0)?bHeight:0) * MVBLOCKSIZE - MVBLOCKSIZE / 2; cx = (cy - j * MVBLOCKSIZE + Factor * i * MVBLOCKSIZE) / Factor; } } else { Factor = (double)(cx) / (double)(cy); cy = ((SignY > 0)?bHeight:0) * MVBLOCKSIZE - MVBLOCKSIZE / 2; cx = Factor * cy + i * MVBLOCKSIZE - Factor * j * MVBLOCKSIZE; if (cx <= - MVBLOCKSIZE || cx >= bWidth * MVBLOCKSIZE) { cx = ((SignX > 0)?bWidth:0) * MVBLOCKSIZE - MVBLOCKSIZE / 2; cy = (cx - i * MVBLOCKSIZE + Factor * j * MVBLOCKSIZE) / Factor; } } cx -= i * MVBLOCKSIZE; cy -= j * MVBLOCKSIZE; BaseX = i + (int)(cx / MVBLOCKSIZE); BaseY = j + (int)(cy / MVBLOCKSIZE); } double mX, mY; mX = (double)(abs(cx % MVBLOCKSIZE))/MVBLOCKSIZE; mY = (double)(abs(cy % MVBLOCKSIZE))/MVBLOCKSIZE; if (BaseX + SignX >= bWidth || BaseX + SignX < 0) mX = 0.0; if (BaseY + SignY >= bHeight || BaseY + SignY < 0) mY = 0.0; Temp[BaseY * bWidth + BaseX] += (1 - mX) * (1 - mY) * CurValue; if (BaseX + SignX < bWidth && BaseX + SignX >= 0) Temp[BaseY * bWidth + BaseX + SignX] += mX * (1 - mY) * CurValue; if (BaseY + SignY < bHeight && BaseY + SignY >= 0) { Temp[(BaseY + SignY) * bWidth + BaseX] += (1 - mX) * mY * CurValue; if (BaseX + SignX < bWidth && BaseX + SignX >= 0) Temp[(BaseY + SignY) * bWidth + BaseX + SignX] += mX * mY * CurValue; } } double * Exch; Exch = Temp; Temp = m_EnergyMap; m_EnergyMap = Exch; for (int k = 0; k < bWidth * bHeight; k ++) Add[k] += m_EnergyMap[k]; //char strWinLen[256]; //_itoa(w,strWinLen,10); //DumpEnergyMap(bWidth, bHeight, strWinLen); } delete[] Temp; } // Average the energy map within the window length for (int i = 0; i < bWidth * bHeight; i ++) { m_EnergyMap[i] = Add[i] / WindowLen; m_EnergyBuffer[i] = (BYTE)(m_EnergyMap[i] * 255); } delete[] Add; // dump out the final energy map within current sliding window if (m_verbose2) { DumpEnergyMap(bWidth, bHeight, "Average within Window (size=4)"); //DumpEnergyBuffer(bWidth, bHeight); } } Here is the call graph for this function:

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