Merge pull request #14599 from rgarnov:gapi_aux_kernels

G-API aux kernels (#14599)

* Removed gcpuimgproc.hpp and gcpucore.hpp

* Changed GModel::orderedInputs and orderedOutputs to get ConstGraph&

* Added auxiliaryKernels() method of GBackend::Priv

modules/gapi/src/api/gbackend.cpp

@@ -45,6 +45,11 @@ void cv::gapi::GBackend::Priv::addBackendPasses(ade::ExecutionEngineSetupContext
     // add custom (backend-specific) graph transformations
 }
 
+cv::gapi::GKernelPackage cv::gapi::GBackend::Priv::auxiliaryKernels() const
+{
+    return {};
+}
+
 // GBackend public implementation //////////////////////////////////////////////
 cv::gapi::GBackend::GBackend()
 {

modules/gapi/src/api/gbackend_priv.hpp

@@ -47,6 +47,8 @@ public:
 
     virtual void addBackendPasses(ade::ExecutionEngineSetupContext &);
 
+    virtual cv::gapi::GKernelPackage auxiliaryKernels() const;
+
     virtual ~Priv() = default;
 };
 

modules/gapi/src/backends/cpu/gcpubackend.cpp

@@ -26,8 +26,8 @@
 #include "compiler/gmodel.hpp"
 
 #include "backends/cpu/gcpubackend.hpp"
-#include "backends/cpu/gcpuimgproc.hpp"
+#include "opencv2/gapi/cpu/imgproc.hpp"
-#include "backends/cpu/gcpucore.hpp"
+#include "opencv2/gapi/cpu/core.hpp"
 
 #include "api/gbackend_priv.hpp" // FIXME: Make it part of Backend SDK!
 

modules/gapi/src/backends/cpu/gcpucore.cpp

@@ -9,7 +9,7 @@
 
 #include "opencv2/gapi/core.hpp"
 #include "opencv2/gapi/cpu/core.hpp"
-#include "backends/cpu/gcpucore.hpp"
+#include "opencv2/gapi/cpu/gcpukernel.hpp"
 
 GAPI_OCV_KERNEL(GCPUAdd, cv::gapi::core::GAdd)
 {

modules/gapi/src/backends/cpu/gcpucore.hpp

@@ -1,24 +0,0 @@
-// This file is part of OpenCV project.
-// It is subject to the license terms in the LICENSE file found in the top-level directory
-// of this distribution and at http://opencv.org/license.html.
-//
-// Copyright (C) 2018 Intel Corporation
-
-
-#ifndef OPENCV_GAPI_GCPUCORE_HPP
-#define OPENCV_GAPI_GCPUCORE_HPP
-
-#include <map>
-#include <string>
-
-#include "opencv2/gapi/cpu/gcpukernel.hpp"
-
-namespace cv { namespace gimpl {
-
-// NB: This is what a "Kernel Package" from the original Wiki doc should be.
-void loadCPUCore(std::map<std::string, cv::GCPUKernel> &kmap);
-
-}
-}
-
-#endif // OPENCV_GAPI_GCPUCORE_HPP

modules/gapi/src/backends/cpu/gcpuimgproc.cpp

@@ -9,7 +9,7 @@
 
 #include "opencv2/gapi/imgproc.hpp"
 #include "opencv2/gapi/cpu/imgproc.hpp"
-#include "backends/cpu/gcpuimgproc.hpp"
+#include "opencv2/gapi/cpu/gcpukernel.hpp"
 
 namespace {
     cv::Mat add_border(const cv::Mat& in, const int ksize, const int borderType, const cv::Scalar& bordVal){

modules/gapi/src/backends/cpu/gcpuimgproc.hpp

@@ -1,23 +0,0 @@
-// This file is part of OpenCV project.
-// It is subject to the license terms in the LICENSE file found in the top-level directory
-// of this distribution and at http://opencv.org/license.html.
-//
-// Copyright (C) 2018 Intel Corporation
-
-
-#ifndef OPENCV_GAPI_GCPUIMGPROC_HPP
-#define OPENCV_GAPI_GCPUIMGPROC_HPP
-
-#include <map>
-#include <string>
-
-#include "opencv2/gapi/cpu/gcpukernel.hpp"
-
-namespace cv { namespace gimpl {
-
-// NB: This is what a "Kernel Package" from the origianl Wiki doc should be.
-void loadCPUImgProc(std::map<std::string, cv::GCPUKernel> &kmap);
-
-}}
-
-#endif // OPENCV_GAPI_GCPUIMGPROC_HPP

modules/gapi/src/compiler/gcompiler.cpp

@@ -48,9 +48,17 @@ namespace
 {
     cv::gapi::GKernelPackage getKernelPackage(cv::GCompileArgs &args)
     {
+        auto withAuxKernels = [](const cv::gapi::GKernelPackage& pkg) {
+            cv::gapi::GKernelPackage aux_pkg;
+            for (const auto &b : pkg.backends()) {
+                aux_pkg = combine(aux_pkg, b.priv().auxiliaryKernels());
+            }
+            return combine(pkg, aux_pkg);
+        };
+
         auto has_use_only = cv::gimpl::getCompileArg<cv::gapi::use_only>(args);
         if (has_use_only)
-            return has_use_only.value().pkg;
+            return withAuxKernels(has_use_only.value().pkg);
 
         static auto ocv_pkg =
 #if !defined(GAPI_STANDALONE)
@@ -60,7 +68,8 @@ namespace
             cv::gapi::GKernelPackage();
 #endif // !defined(GAPI_STANDALONE)
         auto user_pkg = cv::gimpl::getCompileArg<cv::gapi::GKernelPackage>(args);
-        return combine(ocv_pkg, user_pkg.value_or(cv::gapi::GKernelPackage{}));
+        auto user_pkg_with_aux = withAuxKernels(user_pkg.value_or(cv::gapi::GKernelPackage{}));
+        return combine(ocv_pkg, user_pkg_with_aux);
     }
 
     cv::util::optional<std::string> getGraphDumpDirectory(cv::GCompileArgs& args)

modules/gapi/src/compiler/gmodel.cpp

@@ -114,7 +114,7 @@ void GModel::linkOut(Graph &g, ade::NodeHandle opH, ade::NodeHandle objH, std::s
     op.outs[out_port] = RcDesc{gm.rc, gm.shape, {}};
 }
 
-std::vector<ade::NodeHandle> GModel::orderedInputs(Graph &g, ade::NodeHandle nh)
+std::vector<ade::NodeHandle> GModel::orderedInputs(ConstGraph &g, ade::NodeHandle nh)
 {
     std::vector<ade::NodeHandle> sorted_in_nhs(nh->inEdges().size());
     for (const auto& in_eh : nh->inEdges())
@@ -126,7 +126,7 @@ std::vector<ade::NodeHandle> GModel::orderedInputs(Graph &g, ade::NodeHandle nh)
     return sorted_in_nhs;
 }
 
-std::vector<ade::NodeHandle> GModel::orderedOutputs(Graph &g, ade::NodeHandle nh)
+std::vector<ade::NodeHandle> GModel::orderedOutputs(ConstGraph &g, ade::NodeHandle nh)
 {
     std::vector<ade::NodeHandle> sorted_out_nhs(nh->outEdges().size());
     for (const auto& out_eh : nh->outEdges())

modules/gapi/src/compiler/gmodel.hpp

@@ -201,8 +201,8 @@ namespace GModel
     GAPI_EXPORTS void redirectReaders(Graph &g, ade::NodeHandle from, ade::NodeHandle to);
     GAPI_EXPORTS void redirectWriter (Graph &g, ade::NodeHandle from, ade::NodeHandle to);
 
-    GAPI_EXPORTS std::vector<ade::NodeHandle> orderedInputs (Graph &g, ade::NodeHandle nh);
+    GAPI_EXPORTS std::vector<ade::NodeHandle> orderedInputs (ConstGraph &g, ade::NodeHandle nh);
-    GAPI_EXPORTS std::vector<ade::NodeHandle> orderedOutputs(Graph &g, ade::NodeHandle nh);
+    GAPI_EXPORTS std::vector<ade::NodeHandle> orderedOutputs(ConstGraph &g, ade::NodeHandle nh);
 
     // Returns input meta array for given op node
     // Array is sparse, as metadata for non-gapi input objects is empty