| void Impala::Core::VideoSet::KfrMotionExtractor::FillBuffer | ( | int | WindowLen, | |
| int | bWidth, | |||
| int | bHeight, | |||
| BYTE * | mvseq | |||
| ) | [inline] |
Definition at line 705 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().
00706 { 00707 double * Add = new double[bWidth * bHeight]; 00708 if (IsInShot) 00709 { 00710 UINT BufferLen = bWidth * bHeight; 00711 double * Temp = new double[BufferLen]; 00712 if (Temp == NULL || Add == NULL) 00713 { 00714 if (Temp != NULL) delete[] Temp; 00715 if (Add != NULL) delete[] Add; 00716 printf("Not Enough Memory! No Map Generated!"); 00717 return; 00718 } 00719 00720 // Initialize the map value to 1.0 00721 for (int i = 0; i < BufferLen; i++) 00722 { 00723 m_EnergyMap[i] = 1.0; 00724 Add[i] = 0.0; 00725 } 00726 00727 //DumpEnergyMap(bWidth, bHeight, "Initialization"); 00728 00729 for (int w = 0; w < WindowLen; w ++) 00730 { 00731 memset(Temp, 0, BufferLen * sizeof(double)); 00732 00733 // read the motion vectors from the "mvseq" buffer 00734 memcpy(m_Buffer, mvseq + sizeof(BYTE)*bWidth*bHeight*2* w, BufferLen * 2); 00735 00736 // loop for the energy map :(20*15, for example) 00737 for (int i = 0; i < bWidth; i++) 00738 for (int j = 0; j < bHeight; j++) 00739 { 00740 double CurValue = m_EnergyMap[j * bWidth + i]; 00741 00742 int cx, cy; 00743 long Ptr = 2 * (j * bWidth + i); 00744 00745 // (cx,cy) is the motion vector 00746 cx = (char)m_Buffer[Ptr]; 00747 cy = (char)m_Buffer[Ptr + 1]; 00748 00749 char SignX, SignY; 00750 SignX = (cx >= 0)? 1:-1; 00751 SignY = (cy >= 0)? 1:-1; 00752 00753 int BaseX,BaseY; 00754 BaseX = i + (int)(cx / MVBLOCKSIZE); 00755 BaseY = j + (int)(cy / MVBLOCKSIZE); 00756 00757 double Factor; 00758 if (BaseX >= bWidth || BaseY >= bHeight || BaseX < 0 || BaseY < 0) 00759 { 00760 if (abs(cx) >= abs(cy)) 00761 { 00762 Factor = (double)(cy) / (double)(cx); 00763 cx = ((SignX > 0)?bWidth:0) * MVBLOCKSIZE - MVBLOCKSIZE / 2; 00764 cy = Factor * cx + j * MVBLOCKSIZE - Factor * i * MVBLOCKSIZE; 00765 if (cy <= -MVBLOCKSIZE || cy >= bHeight * MVBLOCKSIZE) 00766 { 00767 cy = ((SignY > 0)?bHeight:0) * MVBLOCKSIZE - MVBLOCKSIZE / 2; 00768 cx = (cy - j * MVBLOCKSIZE + Factor * i * MVBLOCKSIZE) / Factor; 00769 } 00770 } 00771 else 00772 { 00773 Factor = (double)(cx) / (double)(cy); 00774 cy = ((SignY > 0)?bHeight:0) * MVBLOCKSIZE - MVBLOCKSIZE / 2; 00775 cx = Factor * cy + i * MVBLOCKSIZE - Factor * j * MVBLOCKSIZE; 00776 if (cx <= - MVBLOCKSIZE || cx >= bWidth * MVBLOCKSIZE) 00777 { 00778 cx = ((SignX > 0)?bWidth:0) * MVBLOCKSIZE - MVBLOCKSIZE / 2; 00779 cy = (cx - i * MVBLOCKSIZE + Factor * j * MVBLOCKSIZE) / Factor; 00780 } 00781 } 00782 cx -= i * MVBLOCKSIZE; 00783 cy -= j * MVBLOCKSIZE; 00784 BaseX = i + (int)(cx / MVBLOCKSIZE); 00785 BaseY = j + (int)(cy / MVBLOCKSIZE); 00786 } 00787 00788 double mX, mY; 00789 mX = (double)(abs(cx % MVBLOCKSIZE))/MVBLOCKSIZE; 00790 mY = (double)(abs(cy % MVBLOCKSIZE))/MVBLOCKSIZE; 00791 if (BaseX + SignX >= bWidth || BaseX + SignX < 0) mX = 0.0; 00792 if (BaseY + SignY >= bHeight || BaseY + SignY < 0) mY = 0.0; 00793 00794 Temp[BaseY * bWidth + BaseX] += (1 - mX) * (1 - mY) * CurValue; 00795 00796 if (BaseX + SignX < bWidth && BaseX + SignX >= 0) 00797 Temp[BaseY * bWidth + BaseX + SignX] += mX * (1 - mY) * CurValue; 00798 if (BaseY + SignY < bHeight && BaseY + SignY >= 0) 00799 { 00800 Temp[(BaseY + SignY) * bWidth + BaseX] += (1 - mX) * mY * CurValue; 00801 if (BaseX + SignX < bWidth && BaseX + SignX >= 0) 00802 Temp[(BaseY + SignY) * bWidth + BaseX + SignX] += mX * mY * CurValue; 00803 } 00804 00805 } 00806 00807 double * Exch; 00808 Exch = Temp; 00809 Temp = m_EnergyMap; 00810 m_EnergyMap = Exch; 00811 00812 for (int k = 0; k < bWidth * bHeight; k ++) 00813 Add[k] += m_EnergyMap[k]; 00814 00815 //char strWinLen[256]; 00816 //_itoa(w,strWinLen,10); 00817 //DumpEnergyMap(bWidth, bHeight, strWinLen); 00818 00819 } 00820 delete[] Temp; 00821 00822 } 00823 00824 // Average the energy map within the window length 00825 for (int i = 0; i < bWidth * bHeight; i ++) 00826 { 00827 m_EnergyMap[i] = Add[i] / WindowLen; 00828 m_EnergyBuffer[i] = (BYTE)(m_EnergyMap[i] * 255); 00829 } 00830 delete[] Add; 00831 00832 // dump out the final energy map within current sliding window 00833 if (m_verbose2) 00834 { 00835 DumpEnergyMap(bWidth, bHeight, "Average within Window (size=4)"); 00836 //DumpEnergyBuffer(bWidth, bHeight); 00837 } 00838 00839 }
Here is the call graph for this function:
