Gpu functionality in stitching module is excluded from Android build

modules/CMakeLists.txt

@@ -28,12 +28,12 @@ endif()
 
 add_subdirectory(video)
 
+if(NOT (ANDROID OR IOS))
+  add_subdirectory(gpu)
+endif()
+
 if(NOT IOS)
   add_subdirectory(traincascade)
   add_subdirectory(haartraining)
-endif()
-
-if(NOT (ANDROID OR IOS))
-  add_subdirectory(gpu)
   add_subdirectory(stitching)
 endif()

modules/stitching/CMakeLists.txt

@@ -1,2 +1,6 @@
 include_directories("${OpenCV_SOURCE_DIR}/modules/imgproc/src") # For gcgraph.hpp
-define_opencv_module(stitching opencv_core opencv_imgproc opencv_features2d opencv_calib3d opencv_gpu opencv_flann opencv_objdetect)
+if(ANDROID)
+    define_opencv_module(stitching opencv_core opencv_imgproc opencv_features2d opencv_calib3d opencv_flann opencv_objdetect)
+else()
+    define_opencv_module(stitching opencv_core opencv_imgproc opencv_features2d opencv_calib3d opencv_flann opencv_objdetect opencv_gpu)
+endif()

modules/stitching/include/opencv2/stitching/detail/warpers.hpp

@@ -44,7 +44,9 @@
 
 #include "opencv2/core/core.hpp"
 #include "opencv2/imgproc/imgproc.hpp"
-#include "opencv2/gpu/gpu.hpp"
+#ifndef ANDROID
+# include "opencv2/gpu/gpu.hpp"
+#endif
 
 namespace cv {
 namespace detail {
@@ -118,7 +120,7 @@ protected:
     void detectResultRoi(Point &dst_tl, Point &dst_br);
 };
 
-
+#ifndef ANDROID
 class CV_EXPORTS PlaneWarperGpu : public PlaneWarper
 {
 public:
@@ -129,6 +131,7 @@ public:
 private:
     gpu::GpuMat d_xmap_, d_ymap_, d_dst_, d_src_;
 };
+#endif
 
 
 struct CV_EXPORTS SphericalProjector : ProjectorBase
@@ -150,6 +153,7 @@ protected:
 };
 
 
+#ifndef ANDROID
 class CV_EXPORTS SphericalWarperGpu : public SphericalWarper
 {
 public:
@@ -160,6 +164,7 @@ public:
 private:
     gpu::GpuMat d_xmap_, d_ymap_, d_dst_, d_src_;
 };
+#endif
 
 
 struct CV_EXPORTS CylindricalProjector : ProjectorBase
@@ -183,6 +188,7 @@ protected:
 };
 
 
+#ifndef ANDROID
 class CV_EXPORTS CylindricalWarperGpu : public CylindricalWarper
 {
 public:
@@ -193,6 +199,7 @@ public:
 private:
     gpu::GpuMat d_xmap_, d_ymap_, d_dst_, d_src_;
 };
+#endif
 
 } // namespace detail
 } // namespace cv

modules/stitching/src/blenders.cpp

@@ -158,7 +158,11 @@ void FeatherBlender::blend(Mat &dst, Mat &dst_mask)
 MultiBandBlender::MultiBandBlender(int try_gpu, int num_bands)
 {
     setNumBands(num_bands);
+#ifndef ANDROID
     can_use_gpu_ = try_gpu && gpu::getCudaEnabledDeviceCount();
+#else
+    can_use_gpu_ = false;
+#endif
 }
 
 
@@ -342,9 +346,9 @@ void createLaplacePyr(const Mat &img, int num_levels, vector<Mat> &pyr)
     }
 }
 
-
 void createLaplacePyrGpu(const Mat &img, int num_levels, vector<Mat> &pyr)
 {
+#ifndef ANDROID
     pyr.resize(num_levels + 1);
 
     vector<gpu::GpuMat> gpu_pyr(num_levels + 1);
@@ -361,9 +365,9 @@ void createLaplacePyrGpu(const Mat &img, int num_levels, vector<Mat> &pyr)
     }
 
     pyr[num_levels] = gpu_pyr[num_levels];
+#endif
 }
 
-
 void restoreImageFromLaplacePyr(vector<Mat> &pyr)
 {
     if (pyr.size() == 0)

modules/stitching/src/exposure_compensate.cpp

@@ -43,7 +43,9 @@
 #include "precomp.hpp"
 
 using namespace std;
+#ifndef ANDROID
 using namespace cv::gpu;
+#endif
 
 namespace cv {
 namespace detail {

modules/stitching/src/matchers.cpp

@@ -45,7 +45,9 @@
 using namespace std;
 using namespace cv;
 using namespace cv::detail;
+#ifndef ANDROID
 using namespace cv::gpu;
+#endif
 
 namespace {
 
@@ -67,7 +69,7 @@ private:
     Ptr<DescriptorExtractor> extractor_;
 };
 
-
+#ifndef ANDROID
 class GpuSurfFeaturesFinder : public FeaturesFinder
 {
 public:
@@ -97,6 +99,7 @@ private:
     int num_octaves_, num_layers_;
     int num_octaves_descr_, num_layers_descr_;
 };
+#endif
 
 
 void CpuSurfFeaturesFinder::find(const Mat &image, ImageFeatures &features)
@@ -108,7 +111,7 @@ void CpuSurfFeaturesFinder::find(const Mat &image, ImageFeatures &features)
     extractor_->compute(gray_image, features.keypoints, features.descriptors);
 }
 
-
+#ifndef ANDROID
 void GpuSurfFeaturesFinder::find(const Mat &image, ImageFeatures &features)
 {
     CV_Assert(image.depth() == CV_8U);
@@ -141,6 +144,7 @@ void GpuSurfFeaturesFinder::releaseMemory()
     keypoints_.release();
     descriptors_.release();
 }
+#endif
 
 
 //////////////////////////////////////////////////////////////////////////////
@@ -220,7 +224,7 @@ private:
     float match_conf_;
 };
 
-
+#ifndef ANDROID
 class GpuMatcher : public FeaturesMatcher
 {
 public:
@@ -235,6 +239,7 @@ private:
     GpuMat train_idx_, distance_, all_dist_;
     vector< vector<DMatch> > pair_matches;
 };
+#endif
 
 
 void CpuMatcher::match(const ImageFeatures &features1, const ImageFeatures &features2, MatchesInfo& matches_info)
@@ -274,7 +279,7 @@ void CpuMatcher::match(const ImageFeatures &features1, const ImageFeatures &feat
     }
 }
 
-
+#ifndef ANDROID
 void GpuMatcher::match(const ImageFeatures &features1, const ImageFeatures &features2, MatchesInfo& matches_info)
 {
     matches_info.matches.clear();
@@ -330,6 +335,7 @@ void GpuMatcher::releaseMemory()
     all_dist_.release();
     vector< vector<DMatch> >().swap(pair_matches);
 }
+#endif
 
 } // namespace
 
@@ -348,9 +354,11 @@ void FeaturesFinder::operator ()(const Mat &image, ImageFeatures &features)
 SurfFeaturesFinder::SurfFeaturesFinder(bool try_use_gpu, double hess_thresh, int num_octaves, int num_layers,
                                        int num_octaves_descr, int num_layers_descr)
 {
+#ifndef ANDROID
     if (try_use_gpu && getCudaEnabledDeviceCount() > 0)
         impl_ = new GpuSurfFeaturesFinder(hess_thresh, num_octaves, num_layers, num_octaves_descr, num_layers_descr);
     else
+#endif
         impl_ = new CpuSurfFeaturesFinder(hess_thresh, num_octaves, num_layers, num_octaves_descr, num_layers_descr);
 }
 
@@ -412,9 +420,11 @@ void FeaturesMatcher::operator ()(const vector<ImageFeatures> &features, vector<
 
 BestOf2NearestMatcher::BestOf2NearestMatcher(bool try_use_gpu, float match_conf, int num_matches_thresh1, int num_matches_thresh2)
 {
+#ifndef ANDROID
     if (try_use_gpu && getCudaEnabledDeviceCount() > 0)
         impl_ = new GpuMatcher(match_conf);
     else
+#endif
         impl_ = new CpuMatcher(match_conf);
 
     is_thread_safe_ = impl_->isThreadSafe();

modules/stitching/src/precomp.hpp

@@ -66,7 +66,9 @@
 #include "opencv2/imgproc/imgproc.hpp"
 #include "opencv2/features2d/features2d.hpp"
 #include "opencv2/calib3d/calib3d.hpp"
-#include "opencv2/gpu/gpu.hpp"
+#ifndef ANDROID
+# include "opencv2/gpu/gpu.hpp"
+#endif
 #include "gcgraph.hpp"
 
 #endif

modules/stitching/src/warpers.cpp

@@ -49,13 +49,27 @@ namespace detail {
 
 Ptr<Warper> Warper::createByCameraFocal(float focal, int type, bool try_gpu)
 {
+#ifndef ANDROID
     bool can_use_gpu = try_gpu && gpu::getCudaEnabledDeviceCount();
+    if (can_use_gpu)
+    {
         if (type == PLANE)
-        return !can_use_gpu ? new PlaneWarper(focal) : new PlaneWarperGpu(focal);
+            return new PlaneWarperGpu(focal);
         if (type == CYLINDRICAL)
-        return !can_use_gpu ? new CylindricalWarper(focal) : new CylindricalWarperGpu(focal);
+            return new CylindricalWarperGpu(focal);
         if (type == SPHERICAL)
-        return !can_use_gpu ? new SphericalWarper(focal) : new SphericalWarperGpu(focal);
+            return new SphericalWarperGpu(focal);
+    }
+    else
+#endif
+    {
+        if (type == PLANE)
+            return new PlaneWarper(focal);
+        if (type == CYLINDRICAL)
+            return new CylindricalWarper(focal);
+        if (type == SPHERICAL)
+            return new SphericalWarper(focal);
+    }
     CV_Error(CV_StsBadArg, "unsupported warping type");
     return NULL;
 }
@@ -107,7 +121,7 @@ void PlaneWarper::detectResultRoi(Point &dst_tl, Point &dst_br)
     dst_br.y = static_cast<int>(br_vf);
 }
 
-
+#ifndef ANDROID
 Point PlaneWarperGpu::warp(const Mat &src, float focal, const Mat &R, Mat &dst, int interp_mode, int border_mode)
 {
     src_size_ = src.size();
@@ -132,6 +146,7 @@ Point PlaneWarperGpu::warp(const Mat &src, float focal, const Mat &R, Mat &dst,
 
     return dst_tl;
 }
+#endif
 
 
 void SphericalWarper::detectResultRoi(Point &dst_tl, Point &dst_br)
@@ -177,7 +192,7 @@ void SphericalWarper::detectResultRoi(Point &dst_tl, Point &dst_br)
     dst_br.y = static_cast<int>(br_vf);
 }
 
-
+#ifndef ANDROID
 Point SphericalWarperGpu::warp(const Mat &src, float focal, const Mat &R, Mat &dst,
                                    int interp_mode, int border_mode)
 {
@@ -230,6 +245,7 @@ Point CylindricalWarperGpu::warp(const Mat &src, float focal, const Mat &R, Mat
 
     return dst_tl;
 }
+#endif
 
 } // namespace detail
 } // namespace cv

samples/cpp/CMakeLists.txt

@@ -19,8 +19,10 @@ if (BUILD_EXAMPLES)
         "${CMAKE_SOURCE_DIR}/modules/legacy/include"
         "${CMAKE_SOURCE_DIR}/modules/contrib/include"
         "${CMAKE_SOURCE_DIR}/modules/stitching/include"
-        "${CMAKE_SOURCE_DIR}/modules/gpu/include"
     )
+    if (NOT ANDROID)
+       include_directories("${CMAKE_SOURCE_DIR}/modules/gpu/include")
+    endif()
 
     if(CMAKE_COMPILER_IS_GNUCXX)
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-function")
@@ -37,10 +39,15 @@ if (BUILD_EXAMPLES)
             PROJECT_LABEL "(EXAMPLE) ${name}")
         add_dependencies(${the_target} opencv_core opencv_flann opencv_imgproc opencv_highgui
             opencv_ml opencv_video opencv_objdetect opencv_features2d
-            opencv_calib3d opencv_legacy opencv_contrib opencv_stitching opencv_gpu)
+            opencv_calib3d opencv_legacy opencv_contrib opencv_stitching)
         target_link_libraries(${the_target} ${OPENCV_LINKER_LIBS} opencv_core
             opencv_flann opencv_imgproc opencv_highgui opencv_ml opencv_video opencv_objdetect
-            opencv_features2d opencv_calib3d opencv_legacy opencv_contrib opencv_stitching opencv_gpu)
+            opencv_features2d opencv_calib3d opencv_legacy opencv_contrib opencv_stitching)
+
+       if (NOT ANDROID)
+            target_link_libraries(${the_target} opencv_gpu)
+            add_dependencies(${the_target} opencv_gpu)
+       endif()
             
         if(ENABLE_SOLUTION_FOLDERS)
             set_target_properties(${the_target} PROPERTIES FOLDER "samples//cpp")