Added first version of videostab module

modules/videostab/src/optical_flow.cpp

@@ -0,0 +1,50 @@
+#include "precomp.hpp"
+#include "opencv2/gpu/gpu.hpp"
+#include "opencv2/video/video.hpp"
+#include "opencv2/videostab/optical_flow.hpp"
+
+using namespace std;
+
+namespace cv
+{
+namespace videostab
+{
+
+void SparsePyrLkOptFlowEstimator::run(
+        InputArray frame0, InputArray frame1, InputArray points0, InputOutputArray points1,
+        OutputArray status, OutputArray errors)
+{
+    calcOpticalFlowPyrLK(frame0, frame1, points0, points1, status, errors, winSize_, maxLevel_);
+}
+
+
+DensePyrLkOptFlowEstimatorGpu::DensePyrLkOptFlowEstimatorGpu()
+{
+    CV_Assert(gpu::getCudaEnabledDeviceCount() > 0);
+}
+
+
+void DensePyrLkOptFlowEstimatorGpu::run(
+        InputArray frame0, InputArray frame1, InputOutputArray flowX, InputOutputArray flowY,
+        OutputArray errors)
+{
+    frame0_.upload(frame0.getMat());
+    frame1_.upload(frame1.getMat());
+
+    optFlowEstimator_.winSize = winSize_;
+    optFlowEstimator_.maxLevel = maxLevel_;
+    if (errors.needed())
+    {
+        optFlowEstimator_.dense(frame0_, frame1_, flowX_, flowY_, &errors_);
+        errors_.download(errors.getMatRef());
+    }
+    else
+        optFlowEstimator_.dense(frame0_, frame1_, flowX_, flowY_);
+
+    flowX_.download(flowX.getMatRef());
+    flowY_.download(flowY.getMatRef());
+}
+
+
+} // namespace videostab
+} // namespace cv