Merge pull request #18491 from TolyaTalamanov:at/wrap-inference

[G-API] Wrap cv::gapi::infer<Generic> into python

* Introduce generic infer

* Move Generic to infer.hpp

* Removew num_outs

* Fix windows warnings

* Fix comments to review

* Fix doxygen

* Add comment

* Fix comments to review

* Wrap inference to python

* Add default ctor to Params

* Add test

* Fix clang build

* Implement GInferInputs/GInferOutputs as Pimpl

* Add checkIEtarget to infer test

* Fix path

* Supress warning

* Use getAvailableDevices insted of checkIETarget

* Move PyParams to bindings_ie

* Add namespace

* Update CMakeLists.txt

modules/gapi/src/backends/ie/bindings_ie.cpp

@@ -0,0 +1,39 @@
+#include <opencv2/gapi/infer/bindings_ie.hpp>
+
+cv::gapi::ie::PyParams::PyParams(const std::string &tag,
+                                 const std::string &model,
+                                 const std::string &weights,
+                                 const std::string &device)
+    : m_priv(std::make_shared<Params<cv::gapi::Generic>>(tag, model, weights, device)) {
+}
+
+cv::gapi::ie::PyParams::PyParams(const std::string &tag,
+                                 const std::string &model,
+                                 const std::string &device)
+    : m_priv(std::make_shared<Params<cv::gapi::Generic>>(tag, model, device)) {
+}
+
+cv::gapi::GBackend cv::gapi::ie::PyParams::backend() const {
+    return m_priv->backend();
+}
+
+std::string cv::gapi::ie::PyParams::tag() const {
+    return m_priv->tag();
+}
+
+cv::util::any cv::gapi::ie::PyParams::params() const {
+    return m_priv->params();
+}
+
+cv::gapi::ie::PyParams cv::gapi::ie::params(const std::string &tag,
+                                            const std::string &model,
+                                            const std::string &weights,
+                                            const std::string &device) {
+    return {tag, model, weights, device};
+}
+
+cv::gapi::ie::PyParams cv::gapi::ie::params(const std::string &tag,
+                                            const std::string &model,
+                                            const std::string &device) {
+    return {tag, model, device};
+}