cvtYUV420p2RGBA  8468 modules/imgproc/src/color.cpp                     case 40: cvtYUV420p2RGBA<0>(dst, srcstep, y, u, v, ustepIdx, vstepIdx); break;
cvtYUV420p2RGBA  8469 modules/imgproc/src/color.cpp                     case 42: cvtYUV420p2RGBA<2>(dst, srcstep, y, u, v, ustepIdx, vstepIdx); break;