Added desync RMats and MediaFrames support

* Removed specialization.

* Removed united

original commit: 651967b95c

cmake/OpenCVPluginStandalone.cmake

@@ -78,10 +78,17 @@ function(ocv_create_plugin module default_name dependency_target dependency_targ
     set_target_properties(${OPENCV_PLUGIN_NAME} PROPERTIES PREFIX "${OPENCV_PLUGIN_MODULE_PREFIX}")
   endif()
 
-  if(APPLE)
-    set_target_properties(${OPENCV_PLUGIN_NAME} PROPERTIES LINK_FLAGS "-undefined dynamic_lookup")
-  elseif(WIN32)
-    # Hack for Windows only, Linux/MacOS uses global symbol table (without exact .so binding)
+  if(WIN32 OR NOT APPLE)
+    set(OPENCV_PLUGIN_NO_LINK FALSE CACHE BOOL "")
+  else()
+    set(OPENCV_PLUGIN_NO_LINK TRUE CACHE BOOL "")
+  endif()
+
+  if(OPENCV_PLUGIN_NO_LINK)
+    if(APPLE)
+      set_target_properties(${OPENCV_PLUGIN_NAME} PROPERTIES LINK_FLAGS "-undefined dynamic_lookup")
+    endif()
+  else()
     find_package(OpenCV REQUIRED ${module} ${OPENCV_PLUGIN_DEPS})
     target_link_libraries(${OPENCV_PLUGIN_NAME} PRIVATE ${OpenCV_LIBRARIES})
   endif()

modules/gapi/include/opencv2/gapi/gcommon.hpp

@@ -44,6 +44,7 @@ namespace detail
         CV_UNKNOWN,    // Unknown, generic, opaque-to-GAPI data type unsupported in graph seriallization
         CV_BOOL,       // bool user G-API data
         CV_INT,        // int user G-API data
+        CV_INT64,      // int64_t user G-API data
         CV_DOUBLE,     // double user G-API data
         CV_FLOAT,      // float user G-API data
         CV_UINT64,     // uint64_t user G-API data
@@ -61,6 +62,7 @@ namespace detail
     template<typename T> struct GOpaqueTraits;
     template<typename T> struct GOpaqueTraits    { static constexpr const OpaqueKind kind = OpaqueKind::CV_UNKNOWN; };
     template<> struct GOpaqueTraits<int>         { static constexpr const OpaqueKind kind = OpaqueKind::CV_INT; };
+    template<> struct GOpaqueTraits<int64_t>     { static constexpr const OpaqueKind kind = OpaqueKind::CV_INT64; };
     template<> struct GOpaqueTraits<double>      { static constexpr const OpaqueKind kind = OpaqueKind::CV_DOUBLE; };
     template<> struct GOpaqueTraits<float>       { static constexpr const OpaqueKind kind = OpaqueKind::CV_FLOAT; };
     template<> struct GOpaqueTraits<uint64_t>    { static constexpr const OpaqueKind kind = OpaqueKind::CV_UINT64; };

modules/gapi/include/opencv2/gapi/gcomputation.hpp

@@ -437,11 +437,7 @@ public:
      *
      * @sa @ref gapi_compile_args
      */
-    GStreamingCompiled compileStreaming(GMetaArgs &&in_metas, GCompileArgs &&args = {});
-
-    /// @private -- Exclude this function from OpenCV documentation
-    GAPI_WRAP GStreamingCompiled compileStreaming(const cv::detail::ExtractMetaCallback &callback,
-                                                        GCompileArgs                   &&args = {});
+    GAPI_WRAP GStreamingCompiled compileStreaming(GMetaArgs &&in_metas, GCompileArgs &&args = {});
 
     /**
      * @brief Compile the computation for streaming mode.
@@ -464,6 +460,10 @@ public:
      */
     GAPI_WRAP GStreamingCompiled compileStreaming(GCompileArgs &&args = {});
 
+    /// @private -- Exclude this function from OpenCV documentation
+    GAPI_WRAP GStreamingCompiled compileStreaming(const cv::detail::ExtractMetaCallback &callback,
+                                                        GCompileArgs                   &&args = {});
+
     // 2. Direct metadata version
     /**
      * @overload

modules/gapi/include/opencv2/gapi/gstreaming.hpp

@@ -2,7 +2,7 @@
 // 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
+// Copyright (C) 2018-2021 Intel Corporation
 
 
 #ifndef OPENCV_GAPI_GSTREAMING_COMPILED_HPP
@@ -65,12 +65,23 @@ using OptionalOpaqueRef = OptRef<cv::detail::OpaqueRef>;
 using GOptRunArgP = util::variant<
     optional<cv::Mat>*,
     optional<cv::RMat>*,
+    optional<cv::MediaFrame>*,
     optional<cv::Scalar>*,
     cv::detail::OptionalVectorRef,
     cv::detail::OptionalOpaqueRef
 >;
 using GOptRunArgsP = std::vector<GOptRunArgP>;
 
+using GOptRunArg = util::variant<
+    optional<cv::Mat>,
+    optional<cv::RMat>,
+    optional<cv::MediaFrame>,
+    optional<cv::Scalar>,
+    optional<cv::detail::VectorRef>,
+    optional<cv::detail::OpaqueRef>
+>;
+using GOptRunArgs = std::vector<GOptRunArg>;
+
 namespace detail {
 
 template<typename T> inline GOptRunArgP wrap_opt_arg(optional<T>& arg) {
@@ -86,6 +97,14 @@ template<> inline GOptRunArgP wrap_opt_arg(optional<cv::Mat> &m) {
     return GOptRunArgP{&m};
 }
 
+template<> inline GOptRunArgP wrap_opt_arg(optional<cv::RMat> &m) {
+    return GOptRunArgP{&m};
+}
+
+template<> inline GOptRunArgP wrap_opt_arg(optional<cv::MediaFrame> &f) {
+    return GOptRunArgP{&f};
+}
+
 template<> inline GOptRunArgP wrap_opt_arg(optional<cv::Scalar> &s) {
     return GOptRunArgP{&s};
 }
@@ -196,7 +215,7 @@ public:
      * @param s a shared pointer to IStreamSource representing the
      * input video stream.
      */
-    GAPI_WRAP void setSource(const gapi::wip::IStreamSource::Ptr& s);
+    void setSource(const gapi::wip::IStreamSource::Ptr& s);
 
     /**
      * @brief Constructs and specifies an input video stream for a
@@ -255,7 +274,7 @@ public:
 
     // NB: Used from python
     /// @private -- Exclude this function from OpenCV documentation
-    GAPI_WRAP std::tuple<bool, cv::GRunArgs> pull();
+    GAPI_WRAP std::tuple<bool, cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>> pull();
 
     /**
      * @brief Get some next available data from the pipeline.
@@ -379,9 +398,11 @@ namespace streaming {
  * In the streaming mode the pipeline steps are connected with queues
  * and this compile argument controls every queue's size.
  */
-struct GAPI_EXPORTS queue_capacity
+struct GAPI_EXPORTS_W_SIMPLE queue_capacity
 {
+    GAPI_WRAP
     explicit queue_capacity(size_t cap = 1) : capacity(cap) { };
+    GAPI_PROP_RW
     size_t capacity;
 };
 /** @} */

modules/gapi/include/opencv2/gapi/infer.hpp

@@ -136,11 +136,12 @@ public:
     }
 
     template <typename U>
-    void setInput(const std::string& name, U in)
+    GInferInputsTyped<Ts...>& setInput(const std::string& name, U in)
     {
         m_priv->blobs.emplace(std::piecewise_construct,
                               std::forward_as_tuple(name),
                               std::forward_as_tuple(in));
+        return *this;
     }
 
     using StorageT = cv::util::variant<Ts...>;
@@ -653,7 +654,8 @@ namespace gapi {
 
 // A type-erased form of network parameters.
 // Similar to how a type-erased GKernel is represented and used.
-struct GAPI_EXPORTS GNetParam {
+/// @private
+struct GAPI_EXPORTS_W_SIMPLE GNetParam {
     std::string tag;     // FIXME: const?
     GBackend backend;    // Specifies the execution model
     util::any params;    // Backend-interpreted parameter structure
@@ -670,6 +672,7 @@ struct GAPI_EXPORTS GNetParam {
  */
 struct GAPI_EXPORTS_W_SIMPLE GNetPackage {
     GAPI_WRAP GNetPackage() = default;
+    GAPI_WRAP explicit GNetPackage(std::vector<GNetParam> nets);
     explicit GNetPackage(std::initializer_list<GNetParam> ii);
     std::vector<GBackend> backends() const;
     std::vector<GNetParam> networks;

modules/gapi/include/opencv2/gapi/infer/bindings_ie.hpp

@@ -22,17 +22,28 @@ namespace ie {
 // This class can be marked as SIMPLE, because it's implemented as pimpl
 class GAPI_EXPORTS_W_SIMPLE PyParams {
 public:
+    GAPI_WRAP
     PyParams() = default;
 
+    GAPI_WRAP
     PyParams(const std::string &tag,
              const std::string &model,
              const std::string &weights,
              const std::string &device);
 
+    GAPI_WRAP
     PyParams(const std::string &tag,
              const std::string &model,
              const std::string &device);
 
+    GAPI_WRAP
+    PyParams& constInput(const std::string &layer_name,
+                         const cv::Mat &data,
+                         TraitAs hint = TraitAs::TENSOR);
+
+    GAPI_WRAP
+    PyParams& cfgNumRequests(size_t nireq);
+
     GBackend      backend() const;
     std::string   tag()     const;
     cv::util::any params()  const;

modules/gapi/include/opencv2/gapi/infer/parsers.hpp

@@ -64,12 +64,13 @@ detection is smaller than confidence threshold, detection is rejected.
 given label will get to the output.
 @return a tuple with a vector of detected boxes and a vector of appropriate labels.
 */
-GAPI_EXPORTS std::tuple<GArray<Rect>, GArray<int>> parseSSD(const GMat& in,
-                                                            const GOpaque<Size>& inSz,
-                                                            const float confidenceThreshold = 0.5f,
-                                                            const int   filterLabel = -1);
+GAPI_EXPORTS_W std::tuple<GArray<Rect>, GArray<int>> parseSSD(const GMat& in,
+                                                              const GOpaque<Size>& inSz,
+                                                              const float confidenceThreshold = 0.5f,
+                                                              const int   filterLabel = -1);
+
+/** @brief Parses output of SSD network.
 
-/** @overload
 Extracts detection information (box, confidence) from SSD output and
 filters it by given confidence and by going out of bounds.
 
@@ -87,9 +88,9 @@ the larger side of the rectangle.
 */
 GAPI_EXPORTS_W GArray<Rect> parseSSD(const GMat& in,
                                      const GOpaque<Size>& inSz,
-                                     const float confidenceThreshold = 0.5f,
-                                     const bool alignmentToSquare = false,
-                                     const bool filterOutOfBounds = false);
+                                     const float confidenceThreshold,
+                                     const bool alignmentToSquare,
+                                     const bool filterOutOfBounds);
 
 /** @brief Parses output of Yolo network.
 
@@ -112,12 +113,12 @@ If 1.f, nms is not performed and no boxes are rejected.
 <a href="https://github.com/openvinotoolkit/open_model_zoo/blob/master/models/public/yolo-v2-tiny-tf/yolo-v2-tiny-tf.md">documentation</a>.
 @return a tuple with a vector of detected boxes and a vector of appropriate labels.
 */
-GAPI_EXPORTS std::tuple<GArray<Rect>, GArray<int>> parseYolo(const GMat& in,
-                                                             const GOpaque<Size>& inSz,
-                                                             const float confidenceThreshold = 0.5f,
-                                                             const float nmsThreshold = 0.5f,
-                                                             const std::vector<float>& anchors
-                                                                 = nn::parsers::GParseYolo::defaultAnchors());
+GAPI_EXPORTS_W std::tuple<GArray<Rect>, GArray<int>> parseYolo(const GMat& in,
+                                                               const GOpaque<Size>& inSz,
+                                                               const float confidenceThreshold = 0.5f,
+                                                               const float nmsThreshold = 0.5f,
+                                                               const std::vector<float>& anchors
+                                                                   = nn::parsers::GParseYolo::defaultAnchors());
 
 } // namespace gapi
 } // namespace cv

modules/gapi/include/opencv2/gapi/own/exports.hpp

@@ -13,11 +13,13 @@
 #       define GAPI_EXPORTS CV_EXPORTS
         /* special informative macros for wrapper generators */
 #       define GAPI_PROP CV_PROP
+#       define GAPI_PROP_RW CV_PROP_RW
 #       define GAPI_WRAP CV_WRAP
 #       define GAPI_EXPORTS_W_SIMPLE CV_EXPORTS_W_SIMPLE
 #       define GAPI_EXPORTS_W CV_EXPORTS_W
 #   else
 #       define GAPI_PROP
+#       define GAPI_PROP_RW
 #       define GAPI_WRAP
 #       define GAPI_EXPORTS
 #       define GAPI_EXPORTS_W_SIMPLE

modules/gapi/include/opencv2/gapi/render/render.hpp

@@ -81,9 +81,9 @@ using GMatDesc2 = std::tuple<cv::GMatDesc,cv::GMatDesc>;
 @param prims vector of drawing primitivies
 @param args graph compile time parameters
 */
-void GAPI_EXPORTS render(cv::Mat& bgr,
-                         const Prims& prims,
-                         cv::GCompileArgs&& args = {});
+void GAPI_EXPORTS_W render(cv::Mat& bgr,
+                           const Prims& prims,
+                           cv::GCompileArgs&& args = {});
 
 /** @brief The function renders on two NV12 planes passed drawing primitivies
 
@@ -92,10 +92,10 @@ void GAPI_EXPORTS render(cv::Mat& bgr,
 @param prims vector of drawing primitivies
 @param args graph compile time parameters
 */
-void GAPI_EXPORTS render(cv::Mat& y_plane,
-                         cv::Mat& uv_plane,
-                         const Prims& prims,
-                         cv::GCompileArgs&& args = {});
+void GAPI_EXPORTS_W render(cv::Mat& y_plane,
+                           cv::Mat& uv_plane,
+                           const Prims& prims,
+                           cv::GCompileArgs&& args = {});
 
 /** @brief The function renders on the input media frame passed drawing primitivies
 
@@ -139,7 +139,7 @@ Output image must be 8-bit unsigned planar 3-channel image
 @param src input image: 8-bit unsigned 3-channel image @ref CV_8UC3
 @param prims draw primitives
 */
-GAPI_EXPORTS GMat render3ch(const GMat& src, const GArray<Prim>& prims);
+GAPI_EXPORTS_W GMat render3ch(const GMat& src, const GArray<Prim>& prims);
 
 /** @brief Renders on two planes
 
@@ -150,9 +150,9 @@ uv image must be 8-bit unsigned planar 2-channel image @ref CV_8UC2
 @param uv input image: 8-bit unsigned 2-channel image @ref CV_8UC2
 @param prims draw primitives
 */
-GAPI_EXPORTS GMat2 renderNV12(const GMat& y,
-                              const GMat& uv,
-                              const GArray<Prim>& prims);
+GAPI_EXPORTS_W GMat2 renderNV12(const GMat& y,
+                                const GMat& uv,
+                                const GArray<Prim>& prims);
 
 /** @brief Renders Media Frame
 
@@ -173,7 +173,7 @@ namespace render
 {
 namespace ocv
 {
-    GAPI_EXPORTS cv::gapi::GKernelPackage kernels();
+    GAPI_EXPORTS_W cv::gapi::GKernelPackage kernels();
 
 } // namespace ocv
 } // namespace render

modules/gapi/include/opencv2/gapi/render/render_types.hpp

@@ -41,7 +41,7 @@ struct freetype_font
  *
  * Parameters match cv::putText().
  */
-struct Text
+struct GAPI_EXPORTS_W_SIMPLE Text
 {
     /**
      * @brief Text constructor
@@ -55,6 +55,7 @@ struct Text
      * @param lt_                 The line type. See #LineTypes
      * @param bottom_left_origin_ When true, the image data origin is at the bottom-left corner. Otherwise, it is at the top-left corner
      */
+    GAPI_WRAP
     Text(const std::string& text_,
          const cv::Point& org_,
          int ff_,
@@ -68,17 +69,18 @@ struct Text
     {
     }
 
+    GAPI_WRAP
     Text() = default;
 
     /*@{*/
-    std::string text;               //!< The text string to be drawn
-    cv::Point   org;                //!< The bottom-left corner of the text string in the image
-    int         ff;                 //!< The font type, see #HersheyFonts
-    double      fs;                 //!< The font scale factor that is multiplied by the font-specific base size
-    cv::Scalar  color;              //!< The text color
-    int         thick;              //!< The thickness of the lines used to draw a text
-    int         lt;                 //!< The line type. See #LineTypes
-    bool        bottom_left_origin; //!< When true, the image data origin is at the bottom-left corner. Otherwise, it is at the top-left corner
+    GAPI_PROP_RW std::string text;               //!< The text string to be drawn
+    GAPI_PROP_RW cv::Point   org;                //!< The bottom-left corner of the text string in the image
+    GAPI_PROP_RW int         ff;                 //!< The font type, see #HersheyFonts
+    GAPI_PROP_RW double      fs;                 //!< The font scale factor that is multiplied by the font-specific base size
+    GAPI_PROP_RW cv::Scalar  color;              //!< The text color
+    GAPI_PROP_RW int         thick;              //!< The thickness of the lines used to draw a text
+    GAPI_PROP_RW int         lt;                 //!< The line type. See #LineTypes
+    GAPI_PROP_RW bool        bottom_left_origin; //!< When true, the image data origin is at the bottom-left corner. Otherwise, it is at the top-left corner
     /*@{*/
 };
 
@@ -122,7 +124,7 @@ struct FText
  *
  * Parameters match cv::rectangle().
  */
-struct Rect
+struct GAPI_EXPORTS_W_SIMPLE Rect
 {
     /**
      * @brief Rect constructor
@@ -142,14 +144,15 @@ struct Rect
     {
     }
 
+    GAPI_WRAP
     Rect() = default;
 
     /*@{*/
-    cv::Rect   rect;  //!< Coordinates of the rectangle
-    cv::Scalar color; //!< The rectangle color or brightness (grayscale image)
-    int        thick; //!< The thickness of lines that make up the rectangle. Negative values, like #FILLED, mean that the function has to draw a filled rectangle
-    int        lt;    //!< The type of the line. See #LineTypes
-    int        shift; //!< The number of fractional bits in the point coordinates
+    GAPI_PROP_RW cv::Rect   rect;  //!< Coordinates of the rectangle
+    GAPI_PROP_RW cv::Scalar color; //!< The rectangle color or brightness (grayscale image)
+    GAPI_PROP_RW int        thick; //!< The thickness of lines that make up the rectangle. Negative values, like #FILLED, mean that the function has to draw a filled rectangle
+    GAPI_PROP_RW int        lt;    //!< The type of the line. See #LineTypes
+    GAPI_PROP_RW int        shift; //!< The number of fractional bits in the point coordinates
     /*@{*/
 };
 
@@ -158,7 +161,7 @@ struct Rect
  *
  * Parameters match cv::circle().
  */
-struct Circle
+struct GAPI_EXPORTS_W_SIMPLE Circle
 {
     /**
      * @brief Circle constructor
@@ -170,6 +173,7 @@ struct Circle
      * @param  lt_     The Type of the circle boundary. See #LineTypes
      * @param  shift_  The Number of fractional bits in the coordinates of the center and in the radius value
      */
+    GAPI_WRAP
     Circle(const cv::Point& center_,
            int radius_,
            const cv::Scalar& color_,
@@ -180,15 +184,16 @@ struct Circle
     {
     }
 
+    GAPI_WRAP
     Circle() = default;
 
     /*@{*/
-    cv::Point  center; //!< The center of the circle
-    int        radius; //!< The radius of the circle
-    cv::Scalar color;  //!< The color of the  circle
-    int        thick;  //!< The thickness of the circle outline, if positive. Negative values, like #FILLED, mean that a filled circle is to be drawn
-    int        lt;     //!< The Type of the circle boundary. See #LineTypes
-    int        shift;  //!< The Number of fractional bits in the coordinates of the center and in the radius value
+    GAPI_PROP_RW cv::Point  center; //!< The center of the circle
+    GAPI_PROP_RW int        radius; //!< The radius of the circle
+    GAPI_PROP_RW cv::Scalar color;  //!< The color of the  circle
+    GAPI_PROP_RW int        thick;  //!< The thickness of the circle outline, if positive. Negative values, like #FILLED, mean that a filled circle is to be drawn
+    GAPI_PROP_RW int        lt;     //!< The Type of the circle boundary. See #LineTypes
+    GAPI_PROP_RW int        shift;  //!< The Number of fractional bits in the coordinates of the center and in the radius value
     /*@{*/
 };
 
@@ -197,7 +202,7 @@ struct Circle
  *
  * Parameters match cv::line().
  */
-struct Line
+struct GAPI_EXPORTS_W_SIMPLE Line
 {
     /**
      * @brief Line constructor
@@ -209,6 +214,7 @@ struct Line
      * @param  lt_     The Type of the line. See #LineTypes
      * @param  shift_  The number of fractional bits in the point coordinates
     */
+    GAPI_WRAP
     Line(const cv::Point& pt1_,
          const cv::Point& pt2_,
          const cv::Scalar& color_,
@@ -219,15 +225,16 @@ struct Line
     {
     }
 
+    GAPI_WRAP
     Line() = default;
 
     /*@{*/
-    cv::Point  pt1;    //!< The first point of the line segment
-    cv::Point  pt2;    //!< The second point of the line segment
-    cv::Scalar color;  //!< The line color
-    int        thick;  //!< The thickness of line
-    int        lt;     //!< The Type of the line. See #LineTypes
-    int        shift;  //!< The number of fractional bits in the point coordinates
+    GAPI_PROP_RW cv::Point  pt1;    //!< The first point of the line segment
+    GAPI_PROP_RW cv::Point  pt2;    //!< The second point of the line segment
+    GAPI_PROP_RW cv::Scalar color;  //!< The line color
+    GAPI_PROP_RW int        thick;  //!< The thickness of line
+    GAPI_PROP_RW int        lt;     //!< The Type of the line. See #LineTypes
+    GAPI_PROP_RW int        shift;  //!< The number of fractional bits in the point coordinates
     /*@{*/
 };
 
@@ -236,7 +243,7 @@ struct Line
  *
  * Mosaicing is a very basic method to obfuscate regions in the image.
  */
-struct Mosaic
+struct GAPI_EXPORTS_W_SIMPLE Mosaic
 {
     /**
      * @brief Mosaic constructor
@@ -252,12 +259,13 @@ struct Mosaic
     {
     }
 
+    GAPI_WRAP
     Mosaic() : cellSz(0), decim(0) {}
 
     /*@{*/
-    cv::Rect   mos;    //!< Coordinates of the mosaic
-    int        cellSz; //!< Cell size (same for X, Y)
-    int        decim;  //!< Decimation (0 stands for no decimation)
+    GAPI_PROP_RW cv::Rect mos;    //!< Coordinates of the mosaic
+    GAPI_PROP_RW int      cellSz; //!< Cell size (same for X, Y)
+    GAPI_PROP_RW int      decim;  //!< Decimation (0 stands for no decimation)
     /*@{*/
 };
 
@@ -266,7 +274,7 @@ struct Mosaic
  *
  * Image is blended on a frame using the specified mask.
  */
-struct Image
+struct GAPI_EXPORTS_W_SIMPLE Image
 {
     /**
      * @brief Mosaic constructor
@@ -275,6 +283,7 @@ struct Image
      * @param  img_   Image to draw
      * @param  alpha_ Alpha channel for image to draw (same size and number of channels)
     */
+    GAPI_WRAP
     Image(const cv::Point& org_,
           const cv::Mat& img_,
           const cv::Mat& alpha_) :
@@ -282,19 +291,20 @@ struct Image
     {
     }
 
+    GAPI_WRAP
     Image() = default;
 
     /*@{*/
-    cv::Point org;   //!< The bottom-left corner of the image
-    cv::Mat   img;   //!< Image to draw
-    cv::Mat   alpha; //!< Alpha channel for image to draw (same size and number of channels)
+    GAPI_PROP_RW cv::Point org;   //!< The bottom-left corner of the image
+    GAPI_PROP_RW cv::Mat   img;   //!< Image to draw
+    GAPI_PROP_RW cv::Mat   alpha; //!< Alpha channel for image to draw (same size and number of channels)
     /*@{*/
 };
 
 /**
  * @brief This structure represents a polygon to draw.
  */
-struct Poly
+struct GAPI_EXPORTS_W_SIMPLE Poly
 {
     /**
      * @brief Mosaic constructor
@@ -305,6 +315,7 @@ struct Poly
      * @param lt_     The Type of the line. See #LineTypes
      * @param shift_  The number of fractional bits in the point coordinate
     */
+    GAPI_WRAP
     Poly(const std::vector<cv::Point>& points_,
          const cv::Scalar& color_,
          int thick_ = 1,
@@ -314,14 +325,15 @@ struct Poly
     {
     }
 
+    GAPI_WRAP
     Poly() = default;
 
     /*@{*/
-    std::vector<cv::Point> points;  //!< Points to connect
-    cv::Scalar             color;   //!< The line color
-    int                    thick;   //!< The thickness of line
-    int                    lt;      //!< The Type of the line. See #LineTypes
-    int                    shift;   //!< The number of fractional bits in the point coordinate
+    GAPI_PROP_RW std::vector<cv::Point> points;  //!< Points to connect
+    GAPI_PROP_RW cv::Scalar             color;   //!< The line color
+    GAPI_PROP_RW int                    thick;   //!< The thickness of line
+    GAPI_PROP_RW int                    lt;      //!< The Type of the line. See #LineTypes
+    GAPI_PROP_RW int                    shift;   //!< The number of fractional bits in the point coordinate
     /*@{*/
 };
 
@@ -336,7 +348,7 @@ using Prim  = util::variant
     , Poly
     >;
 
-using Prims     = std::vector<Prim>;
+using Prims = std::vector<Prim>;
 //! @} gapi_draw_prims
 
 } // namespace draw

modules/gapi/include/opencv2/gapi/streaming/desync.hpp

@@ -2,7 +2,7 @@
 // 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) 2020 Intel Corporation
+// Copyright (C) 2020-2021 Intel Corporation
 
 
 #ifndef OPENCV_GAPI_GSTREAMING_DESYNC_HPP
@@ -73,9 +73,10 @@ G desync(const G &g) {
  * which produces an array of cv::util::optional<> objects.
  *
  * @note This feature is highly experimental now and is currently
- * limited to a single GMat argument only.
+ * limited to a single GMat/GFrame argument only.
  */
 GAPI_EXPORTS GMat desync(const GMat &g);
+GAPI_EXPORTS GFrame desync(const GFrame &f);
 
 } // namespace streaming
 } // namespace gapi

modules/gapi/include/opencv2/gapi/streaming/format.hpp

@@ -74,7 +74,7 @@ e.g when graph's input needs to be passed directly to output, like in Streaming
 @param in Input image
 @return Copy of the input
 */
-GAPI_EXPORTS GMat copy(const GMat& in);
+GAPI_EXPORTS_W GMat copy(const GMat& in);
 
 /** @brief Makes a copy of the input frame. Note that this copy may be not real
 (no actual data copied). Use this function to maintain graph contracts,

modules/gapi/misc/python/package/gapi/__init__.py

@@ -11,6 +11,36 @@ def register(mname):
     return parameterized
 
 
+@register('cv2.gapi')
+def networks(*args):
+    return cv.gapi_GNetPackage(list(map(cv.detail.strip, args)))
+
+
+@register('cv2.gapi')
+def compile_args(*args):
+    return list(map(cv.GCompileArg, args))
+
+
+@register('cv2')
+def GIn(*args):
+    return [*args]
+
+
+@register('cv2')
+def GOut(*args):
+    return [*args]
+
+
+@register('cv2')
+def gin(*args):
+    return [*args]
+
+
+@register('cv2.gapi')
+def descr_of(*args):
+    return [*args]
+
+
 @register('cv2')
 class GOpaque():
     # NB: Inheritance from c++ class cause segfault.
@@ -54,6 +84,10 @@ class GOpaque():
         def __new__(self):
             return cv.GOpaqueT(cv.gapi.CV_RECT)
 
+    class Prim():
+        def __new__(self):
+            return cv.GOpaqueT(cv.gapi.CV_DRAW_PRIM)
+
     class Any():
         def __new__(self):
             return cv.GOpaqueT(cv.gapi.CV_ANY)
@@ -113,6 +147,10 @@ class GArray():
         def __new__(self):
             return cv.GArrayT(cv.gapi.CV_GMAT)
 
+    class Prim():
+        def __new__(self):
+            return cv.GArray(cv.gapi.CV_DRAW_PRIM)
+
     class Any():
         def __new__(self):
             return cv.GArray(cv.gapi.CV_ANY)
@@ -134,6 +172,7 @@ def op(op_id, in_types, out_types):
             cv.GArray.Scalar:  cv.gapi.CV_SCALAR,
             cv.GArray.Mat:     cv.gapi.CV_MAT,
             cv.GArray.GMat:    cv.gapi.CV_GMAT,
+            cv.GArray.Prim:    cv.gapi.CV_DRAW_PRIM,
             cv.GArray.Any:     cv.gapi.CV_ANY
     }
 
@@ -149,22 +188,24 @@ def op(op_id, in_types, out_types):
             cv.GOpaque.Point2f: cv.gapi.CV_POINT2F,
             cv.GOpaque.Size:    cv.gapi.CV_SIZE,
             cv.GOpaque.Rect:    cv.gapi.CV_RECT,
+            cv.GOpaque.Prim:    cv.gapi.CV_DRAW_PRIM,
             cv.GOpaque.Any:     cv.gapi.CV_ANY
     }
 
     type2str = {
-        cv.gapi.CV_BOOL:    'cv.gapi.CV_BOOL' ,
-        cv.gapi.CV_INT:     'cv.gapi.CV_INT' ,
-        cv.gapi.CV_DOUBLE:  'cv.gapi.CV_DOUBLE' ,
-        cv.gapi.CV_FLOAT:   'cv.gapi.CV_FLOAT' ,
-        cv.gapi.CV_STRING:  'cv.gapi.CV_STRING' ,
-        cv.gapi.CV_POINT:   'cv.gapi.CV_POINT' ,
-        cv.gapi.CV_POINT2F: 'cv.gapi.CV_POINT2F' ,
-        cv.gapi.CV_SIZE:    'cv.gapi.CV_SIZE',
-        cv.gapi.CV_RECT:    'cv.gapi.CV_RECT',
-        cv.gapi.CV_SCALAR:  'cv.gapi.CV_SCALAR',
-        cv.gapi.CV_MAT:     'cv.gapi.CV_MAT',
-        cv.gapi.CV_GMAT:    'cv.gapi.CV_GMAT'
+        cv.gapi.CV_BOOL:      'cv.gapi.CV_BOOL' ,
+        cv.gapi.CV_INT:       'cv.gapi.CV_INT' ,
+        cv.gapi.CV_DOUBLE:    'cv.gapi.CV_DOUBLE' ,
+        cv.gapi.CV_FLOAT:     'cv.gapi.CV_FLOAT' ,
+        cv.gapi.CV_STRING:    'cv.gapi.CV_STRING' ,
+        cv.gapi.CV_POINT:     'cv.gapi.CV_POINT' ,
+        cv.gapi.CV_POINT2F:   'cv.gapi.CV_POINT2F' ,
+        cv.gapi.CV_SIZE:      'cv.gapi.CV_SIZE',
+        cv.gapi.CV_RECT:      'cv.gapi.CV_RECT',
+        cv.gapi.CV_SCALAR:    'cv.gapi.CV_SCALAR',
+        cv.gapi.CV_MAT:       'cv.gapi.CV_MAT',
+        cv.gapi.CV_GMAT:      'cv.gapi.CV_GMAT',
+        cv.gapi.CV_DRAW_PRIM: 'cv.gapi.CV_DRAW_PRIM'
     }
 
     # NB: Second lvl decorator takes class to decorate
@@ -244,3 +285,15 @@ def kernel(op_cls):
         return cls
 
     return kernel_with_params
+
+
+# FIXME: On the c++ side every class is placed in cv2 module.
+cv.gapi.wip.draw.Rect = cv.gapi_wip_draw_Rect
+cv.gapi.wip.draw.Text = cv.gapi_wip_draw_Text
+cv.gapi.wip.draw.Circle = cv.gapi_wip_draw_Circle
+cv.gapi.wip.draw.Line = cv.gapi_wip_draw_Line
+cv.gapi.wip.draw.Mosaic = cv.gapi_wip_draw_Mosaic
+cv.gapi.wip.draw.Image = cv.gapi_wip_draw_Image
+cv.gapi.wip.draw.Poly = cv.gapi_wip_draw_Poly
+
+cv.gapi.streaming.queue_capacity = cv.gapi_streaming_queue_capacity

modules/gapi/misc/python/pyopencv_gapi.hpp

@@ -11,12 +11,14 @@
 #include <opencv2/gapi/python/python.hpp>
 
 // NB: Python wrapper replaces :: with _ for classes
-using gapi_GKernelPackage        = cv::gapi::GKernelPackage;
-using gapi_GNetPackage           = cv::gapi::GNetPackage;
-using gapi_ie_PyParams           = cv::gapi::ie::PyParams;
-using gapi_wip_IStreamSource_Ptr = cv::Ptr<cv::gapi::wip::IStreamSource>;
-using detail_ExtractArgsCallback = cv::detail::ExtractArgsCallback;
-using detail_ExtractMetaCallback = cv::detail::ExtractMetaCallback;
+using gapi_GKernelPackage           = cv::gapi::GKernelPackage;
+using gapi_GNetPackage              = cv::gapi::GNetPackage;
+using gapi_ie_PyParams              = cv::gapi::ie::PyParams;
+using gapi_wip_IStreamSource_Ptr    = cv::Ptr<cv::gapi::wip::IStreamSource>;
+using detail_ExtractArgsCallback    = cv::detail::ExtractArgsCallback;
+using detail_ExtractMetaCallback    = cv::detail::ExtractMetaCallback;
+using vector_GNetParam              = std::vector<cv::gapi::GNetParam>;
+using gapi_streaming_queue_capacity = cv::gapi::streaming::queue_capacity;
 
 // NB: Python wrapper generate T_U for T<U>
 // This behavior is only observed for inputs
@@ -42,6 +44,7 @@ using GArray_Rect    = cv::GArray<cv::Rect>;
 using GArray_Scalar  = cv::GArray<cv::Scalar>;
 using GArray_Mat     = cv::GArray<cv::Mat>;
 using GArray_GMat    = cv::GArray<cv::GMat>;
+using GArray_Prim    = cv::GArray<cv::gapi::wip::draw::Prim>;
 
 // FIXME: Python wrapper generate code without namespace std,
 // so it cause error: "string wasn't declared"
@@ -124,6 +127,95 @@ PyObject* pyopencv_from(const cv::detail::PyObjectHolder& v)
     return o;
 }
 
+// #FIXME: Is it possible to implement pyopencv_from/pyopencv_to for generic
+// cv::variant<Types...> ?
+template <>
+PyObject* pyopencv_from(const cv::gapi::wip::draw::Prim& prim)
+{
+    switch (prim.index())
+    {
+        case cv::gapi::wip::draw::Prim::index_of<cv::gapi::wip::draw::Rect>():
+            return pyopencv_from(cv::util::get<cv::gapi::wip::draw::Rect>(prim));
+        case cv::gapi::wip::draw::Prim::index_of<cv::gapi::wip::draw::Text>():
+            return pyopencv_from(cv::util::get<cv::gapi::wip::draw::Text>(prim));
+        case cv::gapi::wip::draw::Prim::index_of<cv::gapi::wip::draw::Circle>():
+            return pyopencv_from(cv::util::get<cv::gapi::wip::draw::Circle>(prim));
+        case cv::gapi::wip::draw::Prim::index_of<cv::gapi::wip::draw::Line>():
+            return pyopencv_from(cv::util::get<cv::gapi::wip::draw::Line>(prim));
+        case cv::gapi::wip::draw::Prim::index_of<cv::gapi::wip::draw::Poly>():
+            return pyopencv_from(cv::util::get<cv::gapi::wip::draw::Poly>(prim));
+        case cv::gapi::wip::draw::Prim::index_of<cv::gapi::wip::draw::Mosaic>():
+            return pyopencv_from(cv::util::get<cv::gapi::wip::draw::Mosaic>(prim));
+        case cv::gapi::wip::draw::Prim::index_of<cv::gapi::wip::draw::Image>():
+            return pyopencv_from(cv::util::get<cv::gapi::wip::draw::Image>(prim));
+    }
+
+    util::throw_error(std::logic_error("Unsupported draw primitive type"));
+}
+
+template <>
+PyObject* pyopencv_from(const cv::gapi::wip::draw::Prims& value)
+{
+    return pyopencv_from_generic_vec(value);
+}
+
+template<>
+bool pyopencv_to(PyObject* obj, cv::gapi::wip::draw::Prim& value, const ArgInfo&)
+{
+#define TRY_EXTRACT(Prim)                                                                                  \
+    if (PyObject_TypeCheck(obj, reinterpret_cast<PyTypeObject*>(pyopencv_gapi_wip_draw_##Prim##_TypePtr))) \
+    {                                                                                                      \
+        value = reinterpret_cast<pyopencv_gapi_wip_draw_##Prim##_t*>(obj)->v;                              \
+        return true;                                                                                       \
+    }                                                                                                      \
+
+    TRY_EXTRACT(Rect)
+    TRY_EXTRACT(Text)
+    TRY_EXTRACT(Circle)
+    TRY_EXTRACT(Line)
+    TRY_EXTRACT(Mosaic)
+    TRY_EXTRACT(Image)
+    TRY_EXTRACT(Poly)
+#undef TRY_EXTRACT
+
+    failmsg("Unsupported primitive type");
+    return false;
+}
+
+template <>
+bool pyopencv_to(PyObject* obj, cv::gapi::wip::draw::Prims& value, const ArgInfo& info)
+{
+    return pyopencv_to_generic_vec(obj, value, info);
+}
+
+template <>
+bool pyopencv_to(PyObject* obj, cv::GMetaArg& value, const ArgInfo&)
+{
+#define TRY_EXTRACT(Meta)                                                    \
+    if (PyObject_TypeCheck(obj,                                              \
+                reinterpret_cast<PyTypeObject*>(pyopencv_##Meta##_TypePtr))) \
+    {                                                                        \
+        value = reinterpret_cast<pyopencv_##Meta##_t*>(obj)->v;              \
+        return true;                                                         \
+    }                                                                        \
+
+    TRY_EXTRACT(GMatDesc)
+    TRY_EXTRACT(GScalarDesc)
+    TRY_EXTRACT(GArrayDesc)
+    TRY_EXTRACT(GOpaqueDesc)
+#undef TRY_EXTRACT
+
+    failmsg("Unsupported cv::GMetaArg type");
+    return false;
+}
+
+template <>
+bool pyopencv_to(PyObject* obj, cv::GMetaArgs& value, const ArgInfo& info)
+{
+    return pyopencv_to_generic_vec(obj, value, info);
+}
+
+
 template<>
 PyObject* pyopencv_from(const cv::GArg& value)
 {
@@ -136,20 +228,21 @@ PyObject* pyopencv_from(const cv::GArg& value)
 #define UNSUPPORTED(T) case cv::detail::OpaqueKind::CV_##T: break
     switch (value.opaque_kind)
     {
-        HANDLE_CASE(BOOL,    bool);
-        HANDLE_CASE(INT,     int);
-        HANDLE_CASE(DOUBLE,  double);
-        HANDLE_CASE(FLOAT,   float);
-        HANDLE_CASE(STRING,  std::string);
-        HANDLE_CASE(POINT,   cv::Point);
-        HANDLE_CASE(POINT2F, cv::Point2f);
-        HANDLE_CASE(SIZE,    cv::Size);
-        HANDLE_CASE(RECT,    cv::Rect);
-        HANDLE_CASE(SCALAR,  cv::Scalar);
-        HANDLE_CASE(MAT,     cv::Mat);
-        HANDLE_CASE(UNKNOWN, cv::detail::PyObjectHolder);
+        HANDLE_CASE(BOOL,      bool);
+        HANDLE_CASE(INT,       int);
+        HANDLE_CASE(INT64,   int64_t);
+        HANDLE_CASE(DOUBLE,    double);
+        HANDLE_CASE(FLOAT,     float);
+        HANDLE_CASE(STRING,    std::string);
+        HANDLE_CASE(POINT,     cv::Point);
+        HANDLE_CASE(POINT2F,   cv::Point2f);
+        HANDLE_CASE(SIZE,      cv::Size);
+        HANDLE_CASE(RECT,      cv::Rect);
+        HANDLE_CASE(SCALAR,    cv::Scalar);
+        HANDLE_CASE(MAT,       cv::Mat);
+        HANDLE_CASE(UNKNOWN,   cv::detail::PyObjectHolder);
+        HANDLE_CASE(DRAW_PRIM, cv::gapi::wip::draw::Prim);
         UNSUPPORTED(UINT64);
-        UNSUPPORTED(DRAW_PRIM);
 #undef HANDLE_CASE
 #undef UNSUPPORTED
     }
@@ -163,6 +256,18 @@ bool pyopencv_to(PyObject* obj, cv::GArg& value, const ArgInfo& info)
     return true;
 }
 
+template <>
+bool pyopencv_to(PyObject* obj, std::vector<cv::gapi::GNetParam>& value, const ArgInfo& info)
+{
+    return pyopencv_to_generic_vec(obj, value, info);
+}
+
+template <>
+PyObject* pyopencv_from(const std::vector<cv::gapi::GNetParam>& value)
+{
+    return pyopencv_from_generic_vec(value);
+}
+
 template <>
 bool pyopencv_to(PyObject* obj, std::vector<GCompileArg>& value, const ArgInfo& info)
 {
@@ -175,12 +280,6 @@ PyObject* pyopencv_from(const std::vector<GCompileArg>& value)
     return pyopencv_from_generic_vec(value);
 }
 
-template <>
-bool pyopencv_to(PyObject* obj, GRunArgs& value, const ArgInfo& info)
-{
-    return pyopencv_to_generic_vec(obj, value, info);
-}
-
 template<>
 PyObject* pyopencv_from(const cv::detail::OpaqueRef& o)
 {
@@ -188,6 +287,7 @@ PyObject* pyopencv_from(const cv::detail::OpaqueRef& o)
     {
         case cv::detail::OpaqueKind::CV_BOOL      : return pyopencv_from(o.rref<bool>());
         case cv::detail::OpaqueKind::CV_INT       : return pyopencv_from(o.rref<int>());
+        case cv::detail::OpaqueKind::CV_INT64     : return pyopencv_from(o.rref<int64_t>());
         case cv::detail::OpaqueKind::CV_DOUBLE    : return pyopencv_from(o.rref<double>());
         case cv::detail::OpaqueKind::CV_FLOAT     : return pyopencv_from(o.rref<float>());
         case cv::detail::OpaqueKind::CV_STRING    : return pyopencv_from(o.rref<std::string>());
@@ -196,10 +296,10 @@ PyObject* pyopencv_from(const cv::detail::OpaqueRef& o)
         case cv::detail::OpaqueKind::CV_SIZE      : return pyopencv_from(o.rref<cv::Size>());
         case cv::detail::OpaqueKind::CV_RECT      : return pyopencv_from(o.rref<cv::Rect>());
         case cv::detail::OpaqueKind::CV_UNKNOWN   : return pyopencv_from(o.rref<cv::GArg>());
+        case cv::detail::OpaqueKind::CV_DRAW_PRIM : return pyopencv_from(o.rref<cv::gapi::wip::draw::Prim>());
         case cv::detail::OpaqueKind::CV_UINT64    : break;
         case cv::detail::OpaqueKind::CV_SCALAR    : break;
         case cv::detail::OpaqueKind::CV_MAT       : break;
-        case cv::detail::OpaqueKind::CV_DRAW_PRIM : break;
     }
 
     PyErr_SetString(PyExc_TypeError, "Unsupported GOpaque type");
@@ -213,6 +313,7 @@ PyObject* pyopencv_from(const cv::detail::VectorRef& v)
     {
         case cv::detail::OpaqueKind::CV_BOOL      : return pyopencv_from_generic_vec(v.rref<bool>());
         case cv::detail::OpaqueKind::CV_INT       : return pyopencv_from_generic_vec(v.rref<int>());
+        case cv::detail::OpaqueKind::CV_INT64     : return pyopencv_from_generic_vec(v.rref<int64_t>());
         case cv::detail::OpaqueKind::CV_DOUBLE    : return pyopencv_from_generic_vec(v.rref<double>());
         case cv::detail::OpaqueKind::CV_FLOAT     : return pyopencv_from_generic_vec(v.rref<float>());
         case cv::detail::OpaqueKind::CV_STRING    : return pyopencv_from_generic_vec(v.rref<std::string>());
@@ -223,8 +324,8 @@ PyObject* pyopencv_from(const cv::detail::VectorRef& v)
         case cv::detail::OpaqueKind::CV_SCALAR    : return pyopencv_from_generic_vec(v.rref<cv::Scalar>());
         case cv::detail::OpaqueKind::CV_MAT       : return pyopencv_from_generic_vec(v.rref<cv::Mat>());
         case cv::detail::OpaqueKind::CV_UNKNOWN   : return pyopencv_from_generic_vec(v.rref<cv::GArg>());
+        case cv::detail::OpaqueKind::CV_DRAW_PRIM : return pyopencv_from_generic_vec(v.rref<cv::gapi::wip::draw::Prim>());
         case cv::detail::OpaqueKind::CV_UINT64    : break;
-        case cv::detail::OpaqueKind::CV_DRAW_PRIM : break;
     }
 
     PyErr_SetString(PyExc_TypeError, "Unsupported GArray type");
@@ -249,52 +350,69 @@ PyObject* pyopencv_from(const GRunArg& v)
             return pyopencv_from(util::get<cv::detail::OpaqueRef>(v));
     }
 
-    PyErr_SetString(PyExc_TypeError, "Failed to unpack GRunArgs");
+    PyErr_SetString(PyExc_TypeError, "Failed to unpack GRunArgs. Index of variant is unknown");
+    return NULL;
+}
+
+template <typename T>
+PyObject* pyopencv_from(const cv::optional<T>& opt)
+{
+    if (!opt.has_value())
+    {
+        Py_RETURN_NONE;
+    }
+    return pyopencv_from(*opt);
+}
+
+template <>
+PyObject* pyopencv_from(const GOptRunArg& v)
+{
+    switch (v.index())
+    {
+        case GOptRunArg::index_of<cv::optional<cv::Mat>>():
+            return pyopencv_from(util::get<cv::optional<cv::Mat>>(v));
+
+        case GOptRunArg::index_of<cv::optional<cv::Scalar>>():
+            return pyopencv_from(util::get<cv::optional<cv::Scalar>>(v));
+
+        case GOptRunArg::index_of<optional<cv::detail::VectorRef>>():
+            return pyopencv_from(util::get<optional<cv::detail::VectorRef>>(v));
+
+        case GOptRunArg::index_of<optional<cv::detail::OpaqueRef>>():
+            return pyopencv_from(util::get<optional<cv::detail::OpaqueRef>>(v));
+    }
+
+    PyErr_SetString(PyExc_TypeError, "Failed to unpack GOptRunArg. Index of variant is unknown");
     return NULL;
 }
 
 template<>
 PyObject* pyopencv_from(const GRunArgs& value)
 {
-    size_t i, n = value.size();
-
-    // NB: It doesn't make sense to return list with a single element
-    if (n == 1)
-    {
-        PyObject* item = pyopencv_from(value[0]);
-        if(!item)
-        {
-            return NULL;
-        }
-        return item;
-    }
-
-    PyObject* list = PyList_New(n);
-    for(i = 0; i < n; ++i)
-    {
-        PyObject* item = pyopencv_from(value[i]);
-        if(!item)
-        {
-            Py_DECREF(list);
-            PyErr_SetString(PyExc_TypeError, "Failed to unpack GRunArgs");
-            return NULL;
-        }
-        PyList_SetItem(list, i, item);
-    }
-
-    return list;
+     return value.size() == 1 ? pyopencv_from(value[0]) : pyopencv_from_generic_vec(value);
 }
 
 template<>
-bool pyopencv_to(PyObject* obj, GMetaArgs& value, const ArgInfo& info)
+PyObject* pyopencv_from(const GOptRunArgs& value)
 {
-    return pyopencv_to_generic_vec(obj, value, info);
+    return value.size() == 1 ? pyopencv_from(value[0]) : pyopencv_from_generic_vec(value);
 }
 
-template<>
-PyObject* pyopencv_from(const GMetaArgs& value)
+// FIXME: cv::variant should be wrapped once for all types.
+template <>
+PyObject* pyopencv_from(const cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>& v)
 {
-    return pyopencv_from_generic_vec(value);
+    using RunArgs = cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>;
+    switch (v.index())
+    {
+        case RunArgs::index_of<cv::GRunArgs>():
+            return pyopencv_from(util::get<cv::GRunArgs>(v));
+        case RunArgs::index_of<cv::GOptRunArgs>():
+            return pyopencv_from(util::get<cv::GOptRunArgs>(v));
+    }
+
+    PyErr_SetString(PyExc_TypeError, "Failed to recognize kind of RunArgs. Index of variant is unknown");
+    return NULL;
 }
 
 template <typename T>
@@ -318,16 +436,16 @@ void pyopencv_to_generic_vec_with_check(PyObject* from,
 }
 
 template <typename T>
-static PyObject* extract_proto_args(PyObject* py_args, PyObject* kw)
+static T extract_proto_args(PyObject* py_args)
 {
     using namespace cv;
 
     GProtoArgs args;
-    Py_ssize_t size = PyTuple_Size(py_args);
+    Py_ssize_t size = PyList_Size(py_args);
     args.reserve(size);
     for (int i = 0; i < size; ++i)
     {
-        PyObject* item = PyTuple_GetItem(py_args, i);
+        PyObject* item = PyList_GetItem(py_args, i);
         if (PyObject_TypeCheck(item, reinterpret_cast<PyTypeObject*>(pyopencv_GScalar_TypePtr)))
         {
             args.emplace_back(reinterpret_cast<pyopencv_GScalar_t*>(item)->v);
@@ -346,22 +464,11 @@ static PyObject* extract_proto_args(PyObject* py_args, PyObject* kw)
         }
         else
         {
-            PyErr_SetString(PyExc_TypeError, "Unsupported type for cv.GIn()/cv.GOut()");
-            return NULL;
+            util::throw_error(std::logic_error("Unsupported type for GProtoArgs"));
         }
     }
 
-    return pyopencv_from<T>(T{std::move(args)});
-}
-
-static PyObject* pyopencv_cv_GIn(PyObject* , PyObject* py_args, PyObject* kw)
-{
-    return extract_proto_args<GProtoInputArgs>(py_args, kw);
-}
-
-static PyObject* pyopencv_cv_GOut(PyObject* , PyObject* py_args, PyObject* kw)
-{
-    return extract_proto_args<GProtoOutputArgs>(py_args, kw);
+    return T(std::move(args));
 }
 
 static cv::detail::OpaqueRef extract_opaque_ref(PyObject* from, cv::detail::OpaqueKind kind)
@@ -386,6 +493,7 @@ static cv::detail::OpaqueRef extract_opaque_ref(PyObject* from, cv::detail::Opaq
         HANDLE_CASE(RECT,    cv::Rect);
         HANDLE_CASE(UNKNOWN, cv::GArg);
         UNSUPPORTED(UINT64);
+        UNSUPPORTED(INT64);
         UNSUPPORTED(SCALAR);
         UNSUPPORTED(MAT);
         UNSUPPORTED(DRAW_PRIM);
@@ -406,20 +514,21 @@ static cv::detail::VectorRef extract_vector_ref(PyObject* from, cv::detail::Opaq
 #define UNSUPPORTED(T) case cv::detail::OpaqueKind::CV_##T: break
     switch (kind)
     {
-        HANDLE_CASE(BOOL,    bool);
-        HANDLE_CASE(INT,     int);
-        HANDLE_CASE(DOUBLE,  double);
-        HANDLE_CASE(FLOAT,   float);
-        HANDLE_CASE(STRING,  std::string);
-        HANDLE_CASE(POINT,   cv::Point);
-        HANDLE_CASE(POINT2F, cv::Point2f);
-        HANDLE_CASE(SIZE,    cv::Size);
-        HANDLE_CASE(RECT,    cv::Rect);
-        HANDLE_CASE(SCALAR,  cv::Scalar);
-        HANDLE_CASE(MAT,     cv::Mat);
-        HANDLE_CASE(UNKNOWN, cv::GArg);
+        HANDLE_CASE(BOOL,      bool);
+        HANDLE_CASE(INT,       int);
+        HANDLE_CASE(DOUBLE,    double);
+        HANDLE_CASE(FLOAT,     float);
+        HANDLE_CASE(STRING,    std::string);
+        HANDLE_CASE(POINT,     cv::Point);
+        HANDLE_CASE(POINT2F,   cv::Point2f);
+        HANDLE_CASE(SIZE,      cv::Size);
+        HANDLE_CASE(RECT,      cv::Rect);
+        HANDLE_CASE(SCALAR,    cv::Scalar);
+        HANDLE_CASE(MAT,       cv::Mat);
+        HANDLE_CASE(UNKNOWN,   cv::GArg);
+        HANDLE_CASE(DRAW_PRIM, cv::gapi::wip::draw::Prim);
         UNSUPPORTED(UINT64);
-        UNSUPPORTED(DRAW_PRIM);
+        UNSUPPORTED(INT64);
 #undef HANDLE_CASE
 #undef UNSUPPORTED
     }
@@ -470,13 +579,15 @@ static cv::GRunArg extract_run_arg(const cv::GTypeInfo& info, PyObject* item)
 
 static cv::GRunArgs extract_run_args(const cv::GTypesInfo& info, PyObject* py_args)
 {
-    cv::GRunArgs args;
-    Py_ssize_t tuple_size = PyTuple_Size(py_args);
-    args.reserve(tuple_size);
+    GAPI_Assert(PyList_Check(py_args));
 
-    for (int i = 0; i < tuple_size; ++i)
+    cv::GRunArgs args;
+    Py_ssize_t list_size = PyList_Size(py_args);
+    args.reserve(list_size);
+
+    for (int i = 0; i < list_size; ++i)
     {
-        args.push_back(extract_run_arg(info[i], PyTuple_GetItem(py_args, i)));
+        args.push_back(extract_run_arg(info[i], PyList_GetItem(py_args, i)));
     }
 
     return args;
@@ -517,13 +628,15 @@ static cv::GMetaArg extract_meta_arg(const cv::GTypeInfo& info, PyObject* item)
 
 static cv::GMetaArgs extract_meta_args(const cv::GTypesInfo& info, PyObject* py_args)
 {
-    cv::GMetaArgs metas;
-    Py_ssize_t tuple_size = PyTuple_Size(py_args);
-    metas.reserve(tuple_size);
+    GAPI_Assert(PyList_Check(py_args));
 
-    for (int i = 0; i < tuple_size; ++i)
+    cv::GMetaArgs metas;
+    Py_ssize_t list_size = PyList_Size(py_args);
+    metas.reserve(list_size);
+
+    for (int i = 0; i < list_size; ++i)
     {
-        metas.push_back(extract_meta_arg(info[i], PyTuple_GetItem(py_args, i)));
+        metas.push_back(extract_meta_arg(info[i], PyList_GetItem(py_args, i)));
     }
 
     return metas;
@@ -581,7 +694,8 @@ static cv::GRunArgs run_py_kernel(cv::detail::PyObjectHolder kernel,
         cv::detail::PyObjectHolder result(
                 PyObject_CallObject(kernel.get(), args.get()), false);
 
-        if (PyErr_Occurred()) {
+        if (PyErr_Occurred())
+        {
             PyErr_PrintEx(0);
             PyErr_Clear();
             throw std::logic_error("Python kernel failed with error!");
@@ -589,8 +703,27 @@ static cv::GRunArgs run_py_kernel(cv::detail::PyObjectHolder kernel,
         // NB: In fact it's impossible situation, becase errors were handled above.
         GAPI_Assert(result.get() && "Python kernel returned NULL!");
 
-        outs = out_info.size() == 1 ? cv::GRunArgs{extract_run_arg(out_info[0], result.get())}
-                                    : extract_run_args(out_info, result.get());
+        if (out_info.size() == 1)
+        {
+            outs = cv::GRunArgs{extract_run_arg(out_info[0], result.get())};
+        }
+        else if (out_info.size() > 1)
+        {
+            GAPI_Assert(PyTuple_Check(result.get()));
+
+            Py_ssize_t tuple_size = PyTuple_Size(result.get());
+            outs.reserve(tuple_size);
+
+            for (int i = 0; i < tuple_size; ++i)
+            {
+                outs.push_back(extract_run_arg(out_info[i], PyTuple_GetItem(result.get(), i)));
+            }
+        }
+        else
+        {
+            // Seems to be impossible case.
+            GAPI_Assert(false);
+        }
     }
     catch (...)
     {
@@ -604,30 +737,12 @@ static cv::GRunArgs run_py_kernel(cv::detail::PyObjectHolder kernel,
 
 static GMetaArg get_meta_arg(PyObject* obj)
 {
-    if (PyObject_TypeCheck(obj,
-                reinterpret_cast<PyTypeObject*>(pyopencv_GMatDesc_TypePtr)))
-    {
-        return cv::GMetaArg{reinterpret_cast<pyopencv_GMatDesc_t*>(obj)->v};
-    }
-    else if (PyObject_TypeCheck(obj,
-                reinterpret_cast<PyTypeObject*>(pyopencv_GScalarDesc_TypePtr)))
-    {
-        return cv::GMetaArg{reinterpret_cast<pyopencv_GScalarDesc_t*>(obj)->v};
-    }
-    else if (PyObject_TypeCheck(obj,
-                reinterpret_cast<PyTypeObject*>(pyopencv_GArrayDesc_TypePtr)))
-    {
-        return cv::GMetaArg{reinterpret_cast<pyopencv_GArrayDesc_t*>(obj)->v};
-    }
-    else if (PyObject_TypeCheck(obj,
-                reinterpret_cast<PyTypeObject*>(pyopencv_GOpaqueDesc_TypePtr)))
-    {
-        return cv::GMetaArg{reinterpret_cast<pyopencv_GOpaqueDesc_t*>(obj)->v};
-    }
-    else
+    cv::GMetaArg arg;
+    if (!pyopencv_to(obj, arg, ArgInfo("arg", false)))
     {
         util::throw_error(std::logic_error("Unsupported output meta type"));
     }
+    return arg;
 }
 
 static cv::GMetaArgs get_meta_args(PyObject* tuple)
@@ -645,8 +760,9 @@ static cv::GMetaArgs get_meta_args(PyObject* tuple)
 }
 
 static GMetaArgs run_py_meta(cv::detail::PyObjectHolder out_meta,
-                            const cv::GMetaArgs         &meta,
-                            const cv::GArgs             &gargs) {
+                             const cv::GMetaArgs         &meta,
+                             const cv::GArgs             &gargs)
+{
     PyGILState_STATE gstate;
     gstate = PyGILState_Ensure();
 
@@ -688,7 +804,8 @@ static GMetaArgs run_py_meta(cv::detail::PyObjectHolder out_meta,
         cv::detail::PyObjectHolder result(
                 PyObject_CallObject(out_meta.get(), args.get()), false);
 
-        if (PyErr_Occurred()) {
+        if (PyErr_Occurred())
+        {
             PyErr_PrintEx(0);
             PyErr_Clear();
             throw std::logic_error("Python outMeta failed with error!");
@@ -720,21 +837,24 @@ static PyObject* pyopencv_cv_gapi_kernels(PyObject* , PyObject* py_args, PyObjec
         PyObject* user_kernel = PyTuple_GetItem(py_args, i);
 
         PyObject* id_obj = PyObject_GetAttrString(user_kernel, "id");
-        if (!id_obj) {
+        if (!id_obj)
+        {
             PyErr_SetString(PyExc_TypeError,
                     "Python kernel should contain id, please use cv.gapi.kernel to define kernel");
             return NULL;
         }
 
         PyObject* out_meta = PyObject_GetAttrString(user_kernel, "outMeta");
-        if (!out_meta) {
+        if (!out_meta)
+        {
             PyErr_SetString(PyExc_TypeError,
                     "Python kernel should contain outMeta, please use cv.gapi.kernel to define kernel");
             return NULL;
         }
 
         PyObject* run  = PyObject_GetAttrString(user_kernel, "run");
-        if (!run) {
+        if (!run)
+        {
             PyErr_SetString(PyExc_TypeError,
                     "Python kernel should contain run, please use cv.gapi.kernel to define kernel");
             return NULL;
@@ -756,23 +876,6 @@ static PyObject* pyopencv_cv_gapi_kernels(PyObject* , PyObject* py_args, PyObjec
     return pyopencv_from(pkg);
 }
 
-static PyObject* pyopencv_cv_gapi_networks(PyObject*, PyObject* py_args, PyObject*)
-{
-    using namespace cv;
-    gapi::GNetPackage pkg;
-    Py_ssize_t size = PyTuple_Size(py_args);
-    for (int i = 0; i < size; ++i)
-    {
-        gapi_ie_PyParams params;
-        PyObject* item = PyTuple_GetItem(py_args, i);
-        if (pyopencv_to(item, params, ArgInfo("PyParams", false)))
-        {
-            pkg += gapi::networks(params);
-        }
-    }
-    return pyopencv_from(pkg);
-}
-
 static PyObject* pyopencv_cv_gapi_op(PyObject* , PyObject* py_args, PyObject*)
 {
     using namespace cv;
@@ -834,53 +937,54 @@ static PyObject* pyopencv_cv_gapi_op(PyObject* , PyObject* py_args, PyObject*)
     return pyopencv_from(cv::gapi::wip::op(id, outMetaWrapper, std::move(args)));
 }
 
-static PyObject* pyopencv_cv_gin(PyObject*, PyObject* py_args, PyObject*)
+template<>
+bool pyopencv_to(PyObject* obj, cv::detail::ExtractArgsCallback& value, const ArgInfo&)
 {
-    cv::detail::PyObjectHolder holder{py_args};
-    auto callback = cv::detail::ExtractArgsCallback{[=](const cv::GTypesInfo& info)
+    cv::detail::PyObjectHolder holder{obj};
+    value = cv::detail::ExtractArgsCallback{[=](const cv::GTypesInfo& info)
+    {
+        PyGILState_STATE gstate;
+        gstate = PyGILState_Ensure();
+
+        cv::GRunArgs args;
+        try
+        {
+            args = extract_run_args(info, holder.get());
+        }
+        catch (...)
         {
-            PyGILState_STATE gstate;
-            gstate = PyGILState_Ensure();
-
-            cv::GRunArgs args;
-            try
-            {
-                args = extract_run_args(info, holder.get());
-            }
-            catch (...)
-            {
-                PyGILState_Release(gstate);
-                throw;
-            }
             PyGILState_Release(gstate);
-            return args;
-        }};
-
-    return pyopencv_from(callback);
+            throw;
+        }
+        PyGILState_Release(gstate);
+        return args;
+    }};
+    return true;
 }
 
-static PyObject* pyopencv_cv_descr_of(PyObject*, PyObject* py_args, PyObject*)
+template<>
+bool pyopencv_to(PyObject* obj, cv::detail::ExtractMetaCallback& value, const ArgInfo&)
 {
-    Py_INCREF(py_args);
-    auto callback = cv::detail::ExtractMetaCallback{[=](const cv::GTypesInfo& info)
-        {
-            PyGILState_STATE gstate;
-            gstate = PyGILState_Ensure();
+    cv::detail::PyObjectHolder holder{obj};
+    value = cv::detail::ExtractMetaCallback{[=](const cv::GTypesInfo& info)
+    {
+        PyGILState_STATE gstate;
+        gstate = PyGILState_Ensure();
 
-            cv::GMetaArgs args;
-            try
-            {
-                args = extract_meta_args(info, py_args);
-            }
-            catch (...)
-            {
-                PyGILState_Release(gstate);
-                throw;
-            }
+        cv::GMetaArgs args;
+        try
+        {
+            args = extract_meta_args(info, holder.get());
+        }
+        catch (...)
+        {
             PyGILState_Release(gstate);
-            return args;
-        }};
-    return pyopencv_from(callback);
+            throw;
+        }
+        PyGILState_Release(gstate);
+        return args;
+    }};
+    return true;
 }
 
 template<typename T>
@@ -895,9 +999,12 @@ struct PyOpenCV_Converter<cv::GArray<T>>
         if (PyObject_TypeCheck(obj, reinterpret_cast<PyTypeObject*>(pyopencv_GArrayT_TypePtr)))
         {
             auto& array = reinterpret_cast<pyopencv_GArrayT_t*>(obj)->v;
-            try {
+            try
+            {
                 value = cv::util::get<cv::GArray<T>>(array.arg());
-            } catch (...) {
+            }
+            catch (...)
+            {
                 return false;
             }
             return true;
@@ -918,9 +1025,12 @@ struct PyOpenCV_Converter<cv::GOpaque<T>>
         if (PyObject_TypeCheck(obj, reinterpret_cast<PyTypeObject*>(pyopencv_GOpaqueT_TypePtr)))
         {
             auto& opaque = reinterpret_cast<pyopencv_GOpaqueT_t*>(obj)->v;
-            try {
+            try
+            {
                 value = cv::util::get<cv::GOpaque<T>>(opaque.arg());
-            } catch (...) {
+            }
+            catch (...)
+            {
                 return false;
             }
             return true;
@@ -929,11 +1039,39 @@ struct PyOpenCV_Converter<cv::GOpaque<T>>
     }
 };
 
+template<>
+bool pyopencv_to(PyObject* obj, cv::GProtoInputArgs& value, const ArgInfo& info)
+{
+    try
+    {
+        value = extract_proto_args<cv::GProtoInputArgs>(obj);
+        return true;
+    }
+    catch (...)
+    {
+        failmsg("Can't parse cv::GProtoInputArgs");
+        return false;
+    }
+}
+
+template<>
+bool pyopencv_to(PyObject* obj, cv::GProtoOutputArgs& value, const ArgInfo& info)
+{
+    try
+    {
+        value = extract_proto_args<cv::GProtoOutputArgs>(obj);
+        return true;
+    }
+    catch (...)
+    {
+        failmsg("Can't parse cv::GProtoOutputArgs");
+        return false;
+    }
+}
 
 // extend cv.gapi methods
 #define PYOPENCV_EXTRA_METHODS_GAPI \
   {"kernels", CV_PY_FN_WITH_KW(pyopencv_cv_gapi_kernels), "kernels(...) -> GKernelPackage"}, \
-  {"networks", CV_PY_FN_WITH_KW(pyopencv_cv_gapi_networks), "networks(...) -> GNetPackage"}, \
   {"__op", CV_PY_FN_WITH_KW(pyopencv_cv_gapi_op), "__op(...) -> retval\n"},
 
 

modules/gapi/misc/python/python_bridge.hpp

@@ -10,6 +10,7 @@
 #include <opencv2/gapi.hpp>
 #include <opencv2/gapi/garg.hpp>
 #include <opencv2/gapi/gopaque.hpp>
+#include <opencv2/gapi/render/render_types.hpp> // Prim
 
 #define ID(T, E)  T
 #define ID_(T, E) ID(T, E),
@@ -24,24 +25,29 @@
             GAPI_Assert(false && "Unsupported type"); \
     }
 
+using cv::gapi::wip::draw::Prim;
+
 #define GARRAY_TYPE_LIST_G(G, G2) \
-WRAP_ARGS(bool        , cv::gapi::ArgType::CV_BOOL,    G)  \
-WRAP_ARGS(int         , cv::gapi::ArgType::CV_INT,     G)  \
-WRAP_ARGS(double      , cv::gapi::ArgType::CV_DOUBLE,  G)  \
-WRAP_ARGS(float       , cv::gapi::ArgType::CV_FLOAT,   G)  \
-WRAP_ARGS(std::string , cv::gapi::ArgType::CV_STRING,  G)  \
-WRAP_ARGS(cv::Point   , cv::gapi::ArgType::CV_POINT,   G)  \
-WRAP_ARGS(cv::Point2f , cv::gapi::ArgType::CV_POINT2F, G)  \
-WRAP_ARGS(cv::Size    , cv::gapi::ArgType::CV_SIZE,    G)  \
-WRAP_ARGS(cv::Rect    , cv::gapi::ArgType::CV_RECT,    G)  \
-WRAP_ARGS(cv::Scalar  , cv::gapi::ArgType::CV_SCALAR,  G)  \
-WRAP_ARGS(cv::Mat     , cv::gapi::ArgType::CV_MAT,     G)  \
-WRAP_ARGS(cv::GArg    , cv::gapi::ArgType::CV_ANY,     G)  \
-WRAP_ARGS(cv::GMat    , cv::gapi::ArgType::CV_GMAT,    G2) \
+WRAP_ARGS(bool        , cv::gapi::ArgType::CV_BOOL,      G)  \
+WRAP_ARGS(int         , cv::gapi::ArgType::CV_INT,       G)  \
+WRAP_ARGS(int64_t     , cv::gapi::ArgType::CV_INT64,     G)  \
+WRAP_ARGS(double      , cv::gapi::ArgType::CV_DOUBLE,    G)  \
+WRAP_ARGS(float       , cv::gapi::ArgType::CV_FLOAT,     G)  \
+WRAP_ARGS(std::string , cv::gapi::ArgType::CV_STRING,    G)  \
+WRAP_ARGS(cv::Point   , cv::gapi::ArgType::CV_POINT,     G)  \
+WRAP_ARGS(cv::Point2f , cv::gapi::ArgType::CV_POINT2F,   G)  \
+WRAP_ARGS(cv::Size    , cv::gapi::ArgType::CV_SIZE,      G)  \
+WRAP_ARGS(cv::Rect    , cv::gapi::ArgType::CV_RECT,      G)  \
+WRAP_ARGS(cv::Scalar  , cv::gapi::ArgType::CV_SCALAR,    G)  \
+WRAP_ARGS(cv::Mat     , cv::gapi::ArgType::CV_MAT,       G)  \
+WRAP_ARGS(Prim        , cv::gapi::ArgType::CV_DRAW_PRIM, G)  \
+WRAP_ARGS(cv::GArg    , cv::gapi::ArgType::CV_ANY,       G)  \
+WRAP_ARGS(cv::GMat    , cv::gapi::ArgType::CV_GMAT,      G2) \
 
 #define GOPAQUE_TYPE_LIST_G(G, G2) \
 WRAP_ARGS(bool        , cv::gapi::ArgType::CV_BOOL,    G)  \
 WRAP_ARGS(int         , cv::gapi::ArgType::CV_INT,     G)  \
+WRAP_ARGS(int64_t     , cv::gapi::ArgType::CV_INT64,   G)  \
 WRAP_ARGS(double      , cv::gapi::ArgType::CV_DOUBLE,  G)  \
 WRAP_ARGS(float       , cv::gapi::ArgType::CV_FLOAT,   G)  \
 WRAP_ARGS(std::string , cv::gapi::ArgType::CV_STRING,  G)  \
@@ -58,6 +64,7 @@ namespace gapi {
 enum ArgType {
     CV_BOOL,
     CV_INT,
+    CV_INT64,
     CV_DOUBLE,
     CV_FLOAT,
     CV_STRING,
@@ -68,6 +75,7 @@ enum ArgType {
     CV_SCALAR,
     CV_MAT,
     CV_GMAT,
+    CV_DRAW_PRIM,
     CV_ANY,
 };
 

modules/gapi/misc/python/shadow_gapi.hpp

@@ -3,64 +3,81 @@
 
 namespace cv
 {
-   struct GAPI_EXPORTS_W_SIMPLE GCompileArg { };
+struct GAPI_EXPORTS_W_SIMPLE GCompileArg
+{
+    GAPI_WRAP GCompileArg(gapi::GKernelPackage arg);
+    GAPI_WRAP GCompileArg(gapi::GNetPackage arg);
+    GAPI_WRAP GCompileArg(gapi::streaming::queue_capacity arg);
+};
 
-   GAPI_EXPORTS_W GCompileArgs compile_args(gapi::GKernelPackage pkg);
-   GAPI_EXPORTS_W GCompileArgs compile_args(gapi::GNetPackage pkg);
-   GAPI_EXPORTS_W GCompileArgs compile_args(gapi::GKernelPackage kernels, gapi::GNetPackage nets);
+class GAPI_EXPORTS_W_SIMPLE GInferInputs
+{
+public:
+    GAPI_WRAP GInferInputs();
+    GAPI_WRAP GInferInputs& setInput(const std::string& name, const cv::GMat&   value);
+    GAPI_WRAP GInferInputs& setInput(const std::string& name, const cv::GFrame& value);
+};
 
-   // NB: This classes doesn't exist in *.so
-   // HACK: Mark them as a class to force python wrapper generate code for this entities
-   class GAPI_EXPORTS_W_SIMPLE GProtoArg { };
-   class GAPI_EXPORTS_W_SIMPLE GProtoInputArgs { };
-   class GAPI_EXPORTS_W_SIMPLE GProtoOutputArgs { };
-   class GAPI_EXPORTS_W_SIMPLE GRunArg { };
-   class GAPI_EXPORTS_W_SIMPLE GMetaArg { GAPI_WRAP GMetaArg(); };
+class GAPI_EXPORTS_W_SIMPLE GInferListInputs
+{
+public:
+    GAPI_WRAP GInferListInputs();
+    GAPI_WRAP GInferListInputs setInput(const std::string& name, const cv::GArray<cv::GMat>& value);
+    GAPI_WRAP GInferListInputs setInput(const std::string& name, const cv::GArray<cv::Rect>& value);
+};
 
-   using GProtoInputArgs  = GIOProtoArgs<In_Tag>;
-   using GProtoOutputArgs = GIOProtoArgs<Out_Tag>;
+class GAPI_EXPORTS_W_SIMPLE GInferOutputs
+{
+public:
+    GAPI_WRAP GInferOutputs();
+    GAPI_WRAP cv::GMat at(const std::string& name);
+};
 
-   class GAPI_EXPORTS_W_SIMPLE GInferInputs
-   {
-   public:
-       GAPI_WRAP GInferInputs();
-       GAPI_WRAP void setInput(const std::string& name, const cv::GMat&   value);
-       GAPI_WRAP void setInput(const std::string& name, const cv::GFrame& value);
-   };
+class GAPI_EXPORTS_W_SIMPLE GInferListOutputs
+{
+public:
+    GAPI_WRAP GInferListOutputs();
+    GAPI_WRAP cv::GArray<cv::GMat> at(const std::string& name);
+};
 
-   class GAPI_EXPORTS_W_SIMPLE GInferListInputs
-   {
-   public:
-       GAPI_WRAP GInferListInputs();
-       GAPI_WRAP void setInput(const std::string& name, const cv::GArray<cv::GMat>& value);
-       GAPI_WRAP void setInput(const std::string& name, const cv::GArray<cv::Rect>& value);
-   };
+namespace gapi
+{
+namespace wip
+{
+class GAPI_EXPORTS_W IStreamSource { };
+namespace draw
+{
+    // NB: These render primitives are partially wrapped in shadow file
+    // because cv::Rect conflicts with cv::gapi::wip::draw::Rect in python generator
+    // and cv::Rect2i breaks standalone mode.
+    struct Rect
+    {
+        GAPI_WRAP Rect(const cv::Rect2i& rect_,
+                       const cv::Scalar& color_,
+                       int thick_ = 1,
+                       int lt_ = 8,
+                       int shift_ = 0);
+    };
 
-   class GAPI_EXPORTS_W_SIMPLE GInferOutputs
-   {
-   public:
-       GAPI_WRAP GInferOutputs();
-       GAPI_WRAP cv::GMat at(const std::string& name);
-   };
+    struct Mosaic
+    {
+        GAPI_WRAP Mosaic(const cv::Rect2i& mos_, int cellSz_, int decim_);
+    };
+} // namespace draw
+} // namespace wip
+namespace streaming
+{
+    // FIXME: Extend to work with an arbitrary G-type.
+    cv::GOpaque<int64_t> GAPI_EXPORTS_W timestamp(cv::GMat);
+    cv::GOpaque<int64_t> GAPI_EXPORTS_W seqNo(cv::GMat);
+    cv::GOpaque<int64_t> GAPI_EXPORTS_W seq_id(cv::GMat);
 
-   class GAPI_EXPORTS_W_SIMPLE GInferListOutputs
-   {
-   public:
-       GAPI_WRAP GInferListOutputs();
-       GAPI_WRAP cv::GArray<cv::GMat> at(const std::string& name);
-   };
+    GAPI_EXPORTS_W cv::GMat desync(const cv::GMat &g);
+} // namespace streaming
+} // namespace gapi
 
-   namespace detail
-   {
-       struct GAPI_EXPORTS_W_SIMPLE ExtractArgsCallback { };
-       struct GAPI_EXPORTS_W_SIMPLE ExtractMetaCallback { };
-   } // namespace detail
-
-   namespace gapi
-   {
-       namespace wip
-       {
-           class GAPI_EXPORTS_W IStreamSource { };
-       } // namespace wip
-   } // namespace gapi
+namespace detail
+{
+    gapi::GNetParam GAPI_EXPORTS_W strip(gapi::ie::PyParams params);
+} // namespace detail
 } // namespace cv

modules/gapi/misc/python/test/test_gapi_core.py

@@ -3,187 +3,209 @@
 import numpy as np
 import cv2 as cv
 import os
+import sys
+import unittest
 
 from tests_common import NewOpenCVTests
 
 
-# Plaidml is an optional backend
-pkgs = [
-          ('ocl'    , cv.gapi.core.ocl.kernels()),
-          ('cpu'    , cv.gapi.core.cpu.kernels()),
-          ('fluid'  , cv.gapi.core.fluid.kernels())
-          # ('plaidml', cv.gapi.core.plaidml.kernels())
-       ]
+try:
+
+    if sys.version_info[:2] < (3, 0):
+        raise unittest.SkipTest('Python 2.x is not supported')
+
+    # Plaidml is an optional backend
+    pkgs = [
+              ('ocl'    , cv.gapi.core.ocl.kernels()),
+              ('cpu'    , cv.gapi.core.cpu.kernels()),
+              ('fluid'  , cv.gapi.core.fluid.kernels())
+              # ('plaidml', cv.gapi.core.plaidml.kernels())
+           ]
 
 
-class gapi_core_test(NewOpenCVTests):
+    class gapi_core_test(NewOpenCVTests):
 
-    def test_add(self):
-        # TODO: Extend to use any type and size here
-        sz = (720, 1280)
-        in1 = np.full(sz, 100)
-        in2 = np.full(sz, 50)
+        def test_add(self):
+            # TODO: Extend to use any type and size here
+            sz = (720, 1280)
+            in1 = np.full(sz, 100)
+            in2 = np.full(sz, 50)
 
-        # OpenCV
-        expected = cv.add(in1, in2)
+            # OpenCV
+            expected = cv.add(in1, in2)
 
-        # G-API
-        g_in1 = cv.GMat()
-        g_in2 = cv.GMat()
-        g_out = cv.gapi.add(g_in1, g_in2)
-        comp = cv.GComputation(cv.GIn(g_in1, g_in2), cv.GOut(g_out))
+            # G-API
+            g_in1 = cv.GMat()
+            g_in2 = cv.GMat()
+            g_out = cv.gapi.add(g_in1, g_in2)
+            comp = cv.GComputation(cv.GIn(g_in1, g_in2), cv.GOut(g_out))
 
-        for pkg_name, pkg in pkgs:
-            actual = comp.apply(cv.gin(in1, in2), args=cv.compile_args(pkg))
-            # Comparison
-            self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF),
-                             'Failed on ' + pkg_name + ' backend')
-            self.assertEqual(expected.dtype, actual.dtype, 'Failed on ' + pkg_name + ' backend')
-
-
-    def test_add_uint8(self):
-        sz = (720, 1280)
-        in1 = np.full(sz, 100, dtype=np.uint8)
-        in2 = np.full(sz, 50 , dtype=np.uint8)
-
-        # OpenCV
-        expected = cv.add(in1, in2)
-
-        # G-API
-        g_in1 = cv.GMat()
-        g_in2 = cv.GMat()
-        g_out = cv.gapi.add(g_in1, g_in2)
-        comp = cv.GComputation(cv.GIn(g_in1, g_in2), cv.GOut(g_out))
-
-        for pkg_name, pkg in pkgs:
-            actual = comp.apply(cv.gin(in1, in2), args=cv.compile_args(pkg))
-            # Comparison
-            self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF),
-                             'Failed on ' + pkg_name + ' backend')
-            self.assertEqual(expected.dtype, actual.dtype, 'Failed on ' + pkg_name + ' backend')
-
-
-    def test_mean(self):
-        img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
-        in_mat = cv.imread(img_path)
-
-        # OpenCV
-        expected = cv.mean(in_mat)
-
-        # G-API
-        g_in = cv.GMat()
-        g_out = cv.gapi.mean(g_in)
-        comp = cv.GComputation(g_in, g_out)
-
-        for pkg_name, pkg in pkgs:
-            actual = comp.apply(cv.gin(in_mat), args=cv.compile_args(pkg))
-            # Comparison
-            self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF),
-                             'Failed on ' + pkg_name + ' backend')
-
-
-    def test_split3(self):
-        img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
-        in_mat = cv.imread(img_path)
-
-        # OpenCV
-        expected = cv.split(in_mat)
-
-        # G-API
-        g_in = cv.GMat()
-        b, g, r = cv.gapi.split3(g_in)
-        comp = cv.GComputation(cv.GIn(g_in), cv.GOut(b, g, r))
-
-        for pkg_name, pkg in pkgs:
-            actual = comp.apply(cv.gin(in_mat), args=cv.compile_args(pkg))
-            # Comparison
-            for e, a in zip(expected, actual):
-                self.assertEqual(0.0, cv.norm(e, a, cv.NORM_INF),
+            for pkg_name, pkg in pkgs:
+                actual = comp.apply(cv.gin(in1, in2), args=cv.gapi.compile_args(pkg))
+                # Comparison
+                self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF),
                                  'Failed on ' + pkg_name + ' backend')
-                self.assertEqual(e.dtype, a.dtype, 'Failed on ' + pkg_name + ' backend')
+                self.assertEqual(expected.dtype, actual.dtype, 'Failed on ' + pkg_name + ' backend')
 
 
-    def test_threshold(self):
-        img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
-        in_mat = cv.cvtColor(cv.imread(img_path), cv.COLOR_RGB2GRAY)
-        maxv = (30, 30)
+        def test_add_uint8(self):
+            sz = (720, 1280)
+            in1 = np.full(sz, 100, dtype=np.uint8)
+            in2 = np.full(sz, 50 , dtype=np.uint8)
 
-        # OpenCV
-        expected_thresh, expected_mat = cv.threshold(in_mat, maxv[0], maxv[0], cv.THRESH_TRIANGLE)
+            # OpenCV
+            expected = cv.add(in1, in2)
 
-        # G-API
-        g_in = cv.GMat()
-        g_sc = cv.GScalar()
-        mat, threshold = cv.gapi.threshold(g_in, g_sc, cv.THRESH_TRIANGLE)
-        comp = cv.GComputation(cv.GIn(g_in, g_sc), cv.GOut(mat, threshold))
+            # G-API
+            g_in1 = cv.GMat()
+            g_in2 = cv.GMat()
+            g_out = cv.gapi.add(g_in1, g_in2)
+            comp = cv.GComputation(cv.GIn(g_in1, g_in2), cv.GOut(g_out))
 
-        for pkg_name, pkg in pkgs:
-            actual_mat, actual_thresh = comp.apply(cv.gin(in_mat, maxv), args=cv.compile_args(pkg))
-            # Comparison
-            self.assertEqual(0.0, cv.norm(expected_mat, actual_mat, cv.NORM_INF),
-                             'Failed on ' + pkg_name + ' backend')
-            self.assertEqual(expected_mat.dtype, actual_mat.dtype,
-                             'Failed on ' + pkg_name + ' backend')
-            self.assertEqual(expected_thresh, actual_thresh[0],
-                             'Failed on ' + pkg_name + ' backend')
-
-    def test_kmeans(self):
-        # K-means params
-        count    = 100
-        sz       = (count, 2)
-        in_mat   = np.random.random(sz).astype(np.float32)
-        K        = 5
-        flags    = cv.KMEANS_RANDOM_CENTERS
-        attempts = 1;
-        criteria = (cv.TERM_CRITERIA_MAX_ITER + cv.TERM_CRITERIA_EPS, 30, 0)
-
-        # G-API
-        g_in = cv.GMat()
-        compactness, out_labels, centers = cv.gapi.kmeans(g_in, K, criteria, attempts, flags)
-        comp = cv.GComputation(cv.GIn(g_in), cv.GOut(compactness, out_labels, centers))
-
-        compact, labels, centers = comp.apply(cv.gin(in_mat))
-
-        # Assert
-        self.assertTrue(compact >= 0)
-        self.assertEqual(sz[0], labels.shape[0])
-        self.assertEqual(1, labels.shape[1])
-        self.assertTrue(labels.size != 0)
-        self.assertEqual(centers.shape[1], sz[1]);
-        self.assertEqual(centers.shape[0], K);
-        self.assertTrue(centers.size != 0);
+            for pkg_name, pkg in pkgs:
+                actual = comp.apply(cv.gin(in1, in2), args=cv.gapi.compile_args(pkg))
+                # Comparison
+                self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF),
+                                 'Failed on ' + pkg_name + ' backend')
+                self.assertEqual(expected.dtype, actual.dtype, 'Failed on ' + pkg_name + ' backend')
 
 
-    def generate_random_points(self, sz):
-        arr = np.random.random(sz).astype(np.float32).T
-        return list(zip(arr[0], arr[1]))
+        def test_mean(self):
+            img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
+            in_mat = cv.imread(img_path)
+
+            # OpenCV
+            expected = cv.mean(in_mat)
+
+            # G-API
+            g_in = cv.GMat()
+            g_out = cv.gapi.mean(g_in)
+            comp = cv.GComputation(g_in, g_out)
+
+            for pkg_name, pkg in pkgs:
+                actual = comp.apply(cv.gin(in_mat), args=cv.gapi.compile_args(pkg))
+                # Comparison
+                self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF),
+                                 'Failed on ' + pkg_name + ' backend')
 
 
-    def test_kmeans_2d(self):
-        # K-means 2D params
-        count     = 100
-        sz        = (count, 2)
-        amount    = sz[0]
-        K         = 5
-        flags     = cv.KMEANS_RANDOM_CENTERS
-        attempts  = 1;
-        criteria  = (cv.TERM_CRITERIA_MAX_ITER + cv.TERM_CRITERIA_EPS, 30, 0);
-        in_vector = self.generate_random_points(sz)
-        in_labels = []
+        def test_split3(self):
+            img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
+            in_mat = cv.imread(img_path)
 
-        # G-API
-        data        = cv.GArrayT(cv.gapi.CV_POINT2F)
-        best_labels = cv.GArrayT(cv.gapi.CV_INT)
+            # OpenCV
+            expected = cv.split(in_mat)
 
-        compactness, out_labels, centers = cv.gapi.kmeans(data, K, best_labels, criteria, attempts, flags);
-        comp = cv.GComputation(cv.GIn(data, best_labels), cv.GOut(compactness, out_labels, centers));
+            # G-API
+            g_in = cv.GMat()
+            b, g, r = cv.gapi.split3(g_in)
+            comp = cv.GComputation(cv.GIn(g_in), cv.GOut(b, g, r))
 
-        compact, labels, centers = comp.apply(cv.gin(in_vector, in_labels));
+            for pkg_name, pkg in pkgs:
+                actual = comp.apply(cv.gin(in_mat), args=cv.gapi.compile_args(pkg))
+                # Comparison
+                for e, a in zip(expected, actual):
+                    self.assertEqual(0.0, cv.norm(e, a, cv.NORM_INF),
+                                     'Failed on ' + pkg_name + ' backend')
+                    self.assertEqual(e.dtype, a.dtype, 'Failed on ' + pkg_name + ' backend')
 
-        # Assert
-        self.assertTrue(compact >= 0)
-        self.assertEqual(amount, len(labels))
-        self.assertEqual(K, len(centers))
+
+        def test_threshold(self):
+            img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
+            in_mat = cv.cvtColor(cv.imread(img_path), cv.COLOR_RGB2GRAY)
+            maxv = (30, 30)
+
+            # OpenCV
+            expected_thresh, expected_mat = cv.threshold(in_mat, maxv[0], maxv[0], cv.THRESH_TRIANGLE)
+
+            # G-API
+            g_in = cv.GMat()
+            g_sc = cv.GScalar()
+            mat, threshold = cv.gapi.threshold(g_in, g_sc, cv.THRESH_TRIANGLE)
+            comp = cv.GComputation(cv.GIn(g_in, g_sc), cv.GOut(mat, threshold))
+
+            for pkg_name, pkg in pkgs:
+                actual_mat, actual_thresh = comp.apply(cv.gin(in_mat, maxv), args=cv.gapi.compile_args(pkg))
+                # Comparison
+                self.assertEqual(0.0, cv.norm(expected_mat, actual_mat, cv.NORM_INF),
+                                 'Failed on ' + pkg_name + ' backend')
+                self.assertEqual(expected_mat.dtype, actual_mat.dtype,
+                                 'Failed on ' + pkg_name + ' backend')
+                self.assertEqual(expected_thresh, actual_thresh[0],
+                                 'Failed on ' + pkg_name + ' backend')
+
+
+        def test_kmeans(self):
+            # K-means params
+            count    = 100
+            sz       = (count, 2)
+            in_mat   = np.random.random(sz).astype(np.float32)
+            K        = 5
+            flags    = cv.KMEANS_RANDOM_CENTERS
+            attempts = 1
+            criteria = (cv.TERM_CRITERIA_MAX_ITER + cv.TERM_CRITERIA_EPS, 30, 0)
+
+            # G-API
+            g_in = cv.GMat()
+            compactness, out_labels, centers = cv.gapi.kmeans(g_in, K, criteria, attempts, flags)
+            comp = cv.GComputation(cv.GIn(g_in), cv.GOut(compactness, out_labels, centers))
+
+            compact, labels, centers = comp.apply(cv.gin(in_mat))
+
+            # Assert
+            self.assertTrue(compact >= 0)
+            self.assertEqual(sz[0], labels.shape[0])
+            self.assertEqual(1, labels.shape[1])
+            self.assertTrue(labels.size != 0)
+            self.assertEqual(centers.shape[1], sz[1])
+            self.assertEqual(centers.shape[0], K)
+            self.assertTrue(centers.size != 0)
+
+
+        def generate_random_points(self, sz):
+            arr = np.random.random(sz).astype(np.float32).T
+            return list(zip(arr[0], arr[1]))
+
+
+        def test_kmeans_2d(self):
+            # K-means 2D params
+            count     = 100
+            sz        = (count, 2)
+            amount    = sz[0]
+            K         = 5
+            flags     = cv.KMEANS_RANDOM_CENTERS
+            attempts  = 1
+            criteria  = (cv.TERM_CRITERIA_MAX_ITER + cv.TERM_CRITERIA_EPS, 30, 0)
+            in_vector = self.generate_random_points(sz)
+            in_labels = []
+
+            # G-API
+            data        = cv.GArrayT(cv.gapi.CV_POINT2F)
+            best_labels = cv.GArrayT(cv.gapi.CV_INT)
+
+            compactness, out_labels, centers = cv.gapi.kmeans(data, K, best_labels, criteria, attempts, flags)
+            comp = cv.GComputation(cv.GIn(data, best_labels), cv.GOut(compactness, out_labels, centers))
+
+            compact, labels, centers = comp.apply(cv.gin(in_vector, in_labels))
+
+            # Assert
+            self.assertTrue(compact >= 0)
+            self.assertEqual(amount, len(labels))
+            self.assertEqual(K, len(centers))
+
+
+except unittest.SkipTest as e:
+
+    message = str(e)
+
+    class TestSkip(unittest.TestCase):
+        def setUp(self):
+            self.skipTest('Skip tests: ' + message)
+
+        def test_skip():
+            pass
+
+    pass
 
 
 if __name__ == '__main__':

modules/gapi/misc/python/test/test_gapi_imgproc.py

@@ -3,103 +3,124 @@
 import numpy as np
 import cv2 as cv
 import os
+import sys
+import unittest
 
 from tests_common import NewOpenCVTests
 
 
-# Plaidml is an optional backend
-pkgs = [
-           ('ocl'    , cv.gapi.core.ocl.kernels()),
-           ('cpu'    , cv.gapi.core.cpu.kernels()),
-           ('fluid'  , cv.gapi.core.fluid.kernels())
-           # ('plaidml', cv.gapi.core.plaidml.kernels())
-       ]
+try:
+
+    if sys.version_info[:2] < (3, 0):
+        raise unittest.SkipTest('Python 2.x is not supported')
+
+    # Plaidml is an optional backend
+    pkgs = [
+               ('ocl'    , cv.gapi.core.ocl.kernels()),
+               ('cpu'    , cv.gapi.core.cpu.kernels()),
+               ('fluid'  , cv.gapi.core.fluid.kernels())
+               # ('plaidml', cv.gapi.core.plaidml.kernels())
+           ]
 
 
-class gapi_imgproc_test(NewOpenCVTests):
+    class gapi_imgproc_test(NewOpenCVTests):
 
-    def test_good_features_to_track(self):
-        # TODO: Extend to use any type and size here
-        img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
-        in1 = cv.cvtColor(cv.imread(img_path), cv.COLOR_RGB2GRAY)
+        def test_good_features_to_track(self):
+            # TODO: Extend to use any type and size here
+            img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
+            in1 = cv.cvtColor(cv.imread(img_path), cv.COLOR_RGB2GRAY)
 
-        # NB: goodFeaturesToTrack configuration
-        max_corners         = 50
-        quality_lvl         = 0.01
-        min_distance        = 10
-        block_sz            = 3
-        use_harris_detector = True
-        k                   = 0.04
-        mask                = None
+            # NB: goodFeaturesToTrack configuration
+            max_corners         = 50
+            quality_lvl         = 0.01
+            min_distance        = 10
+            block_sz            = 3
+            use_harris_detector = True
+            k                   = 0.04
+            mask                = None
 
-        # OpenCV
-        expected = cv.goodFeaturesToTrack(in1, max_corners, quality_lvl,
-                                          min_distance, mask=mask,
-                                          blockSize=block_sz, useHarrisDetector=use_harris_detector, k=k)
+            # OpenCV
+            expected = cv.goodFeaturesToTrack(in1, max_corners, quality_lvl,
+                                              min_distance, mask=mask,
+                                              blockSize=block_sz, useHarrisDetector=use_harris_detector, k=k)
 
-        # G-API
-        g_in = cv.GMat()
-        g_out = cv.gapi.goodFeaturesToTrack(g_in, max_corners, quality_lvl,
-                                            min_distance, mask, block_sz, use_harris_detector, k)
+            # G-API
+            g_in = cv.GMat()
+            g_out = cv.gapi.goodFeaturesToTrack(g_in, max_corners, quality_lvl,
+                                                min_distance, mask, block_sz, use_harris_detector, k)
 
-        comp = cv.GComputation(cv.GIn(g_in), cv.GOut(g_out))
+            comp = cv.GComputation(cv.GIn(g_in), cv.GOut(g_out))
 
-        for pkg_name, pkg in pkgs:
-            actual = comp.apply(cv.gin(in1), args=cv.compile_args(pkg))
-            # NB: OpenCV & G-API have different output shapes:
-            # OpenCV - (num_points, 1, 2)
-            # G-API  - (num_points, 2)
-            # Comparison
-            self.assertEqual(0.0, cv.norm(expected.flatten(),
-                                          np.array(actual, dtype=np.float32).flatten(),
-                                          cv.NORM_INF),
-                             'Failed on ' + pkg_name + ' backend')
+            for pkg_name, pkg in pkgs:
+                actual = comp.apply(cv.gin(in1), args=cv.gapi.compile_args(pkg))
+                # NB: OpenCV & G-API have different output shapes:
+                # OpenCV - (num_points, 1, 2)
+                # G-API  - (num_points, 2)
+                # Comparison
+                self.assertEqual(0.0, cv.norm(expected.flatten(),
+                                              np.array(actual, dtype=np.float32).flatten(),
+                                              cv.NORM_INF),
+                                 'Failed on ' + pkg_name + ' backend')
 
 
-    def test_rgb2gray(self):
-        # TODO: Extend to use any type and size here
-        img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
-        in1 = cv.imread(img_path)
+        def test_rgb2gray(self):
+            # TODO: Extend to use any type and size here
+            img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
+            in1 = cv.imread(img_path)
 
-        # OpenCV
-        expected = cv.cvtColor(in1, cv.COLOR_RGB2GRAY)
+            # OpenCV
+            expected = cv.cvtColor(in1, cv.COLOR_RGB2GRAY)
 
-        # G-API
-        g_in = cv.GMat()
-        g_out = cv.gapi.RGB2Gray(g_in)
+            # G-API
+            g_in = cv.GMat()
+            g_out = cv.gapi.RGB2Gray(g_in)
 
-        comp = cv.GComputation(cv.GIn(g_in), cv.GOut(g_out))
+            comp = cv.GComputation(cv.GIn(g_in), cv.GOut(g_out))
 
-        for pkg_name, pkg in pkgs:
-            actual = comp.apply(cv.gin(in1), args=cv.compile_args(pkg))
-            # Comparison
-            self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF),
-                             'Failed on ' + pkg_name + ' backend')
+            for pkg_name, pkg in pkgs:
+                actual = comp.apply(cv.gin(in1), args=cv.gapi.compile_args(pkg))
+                # Comparison
+                self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF),
+                                 'Failed on ' + pkg_name + ' backend')
 
 
-    def test_bounding_rect(self):
-        sz = 1280
-        fscale = 256
+        def test_bounding_rect(self):
+            sz = 1280
+            fscale = 256
 
-        def sample_value(fscale):
-            return np.random.uniform(0, 255 * fscale) / fscale
+            def sample_value(fscale):
+                return np.random.uniform(0, 255 * fscale) / fscale
 
-        points = np.array([(sample_value(fscale), sample_value(fscale)) for _ in range(1280)], np.float32)
+            points = np.array([(sample_value(fscale), sample_value(fscale)) for _ in range(1280)], np.float32)
 
-        # OpenCV
-        expected = cv.boundingRect(points)
+            # OpenCV
+            expected = cv.boundingRect(points)
 
-        # G-API
-        g_in  = cv.GMat()
-        g_out = cv.gapi.boundingRect(g_in)
+            # G-API
+            g_in  = cv.GMat()
+            g_out = cv.gapi.boundingRect(g_in)
 
-        comp = cv.GComputation(cv.GIn(g_in), cv.GOut(g_out))
+            comp = cv.GComputation(cv.GIn(g_in), cv.GOut(g_out))
 
-        for pkg_name, pkg in pkgs:
-            actual = comp.apply(cv.gin(points), args=cv.compile_args(pkg))
-            # Comparison
-            self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF),
-                             'Failed on ' + pkg_name + ' backend')
+            for pkg_name, pkg in pkgs:
+                actual = comp.apply(cv.gin(points), args=cv.gapi.compile_args(pkg))
+                # Comparison
+                self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF),
+                                 'Failed on ' + pkg_name + ' backend')
+
+
+except unittest.SkipTest as e:
+
+    message = str(e)
+
+    class TestSkip(unittest.TestCase):
+        def setUp(self):
+            self.skipTest('Skip tests: ' + message)
+
+        def test_skip():
+            pass
+
+    pass
 
 
 if __name__ == '__main__':

modules/gapi/misc/python/test/test_gapi_infer.py

@@ -3,318 +3,338 @@
 import numpy as np
 import cv2 as cv
 import os
+import sys
+import unittest
 
 from tests_common import NewOpenCVTests
 
 
-class test_gapi_infer(NewOpenCVTests):
+try:
 
-    def infer_reference_network(self, model_path, weights_path, img):
-        net = cv.dnn.readNetFromModelOptimizer(model_path, weights_path)
-        net.setPreferableBackend(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE)
-        net.setPreferableTarget(cv.dnn.DNN_TARGET_CPU)
-
-        blob = cv.dnn.blobFromImage(img)
-
-        net.setInput(blob)
-        return net.forward(net.getUnconnectedOutLayersNames())
+    if sys.version_info[:2] < (3, 0):
+        raise unittest.SkipTest('Python 2.x is not supported')
 
 
-    def make_roi(self, img, roi):
-        return img[roi[1]:roi[1] + roi[3], roi[0]:roi[0] + roi[2], ...]
+    class test_gapi_infer(NewOpenCVTests):
+
+        def infer_reference_network(self, model_path, weights_path, img):
+            net = cv.dnn.readNetFromModelOptimizer(model_path, weights_path)
+            net.setPreferableBackend(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE)
+            net.setPreferableTarget(cv.dnn.DNN_TARGET_CPU)
+
+            blob = cv.dnn.blobFromImage(img)
+
+            net.setInput(blob)
+            return net.forward(net.getUnconnectedOutLayersNames())
 
 
-    def test_age_gender_infer(self):
-        # NB: Check IE
-        if not cv.dnn.DNN_TARGET_CPU in cv.dnn.getAvailableTargets(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE):
-            return
-
-        root_path    = '/omz_intel_models/intel/age-gender-recognition-retail-0013/FP32/age-gender-recognition-retail-0013'
-        model_path   = self.find_file(root_path + '.xml',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
-        weights_path = self.find_file(root_path + '.bin',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
-        device_id    = 'CPU'
-
-        img_path  = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
-        img       = cv.resize(cv.imread(img_path), (62,62))
-
-        # OpenCV DNN
-        dnn_age, dnn_gender = self.infer_reference_network(model_path, weights_path, img)
-
-        # OpenCV G-API
-        g_in   = cv.GMat()
-        inputs = cv.GInferInputs()
-        inputs.setInput('data', g_in)
-
-        outputs  = cv.gapi.infer("net", inputs)
-        age_g    = outputs.at("age_conv3")
-        gender_g = outputs.at("prob")
-
-        comp = cv.GComputation(cv.GIn(g_in), cv.GOut(age_g, gender_g))
-        pp = cv.gapi.ie.params("net", model_path, weights_path, device_id)
-
-        gapi_age, gapi_gender = comp.apply(cv.gin(img), args=cv.compile_args(cv.gapi.networks(pp)))
-
-        # Check
-        self.assertEqual(0.0, cv.norm(dnn_gender, gapi_gender, cv.NORM_INF))
-        self.assertEqual(0.0, cv.norm(dnn_age, gapi_age, cv.NORM_INF))
+        def make_roi(self, img, roi):
+            return img[roi[1]:roi[1] + roi[3], roi[0]:roi[0] + roi[2], ...]
 
 
-    def test_age_gender_infer_roi(self):
-        # NB: Check IE
-        if not cv.dnn.DNN_TARGET_CPU in cv.dnn.getAvailableTargets(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE):
-            return
+        def test_age_gender_infer(self):
+            # NB: Check IE
+            if not cv.dnn.DNN_TARGET_CPU in cv.dnn.getAvailableTargets(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE):
+                return
 
-        root_path    = '/omz_intel_models/intel/age-gender-recognition-retail-0013/FP32/age-gender-recognition-retail-0013'
-        model_path   = self.find_file(root_path + '.xml',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
-        weights_path = self.find_file(root_path + '.bin',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
-        device_id    = 'CPU'
+            root_path    = '/omz_intel_models/intel/age-gender-recognition-retail-0013/FP32/age-gender-recognition-retail-0013'
+            model_path   = self.find_file(root_path + '.xml',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
+            weights_path = self.find_file(root_path + '.bin',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
+            device_id    = 'CPU'
 
-        img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
-        img = cv.imread(img_path)
-        roi      = (10, 10, 62, 62)
+            img_path  = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
+            img       = cv.resize(cv.imread(img_path), (62,62))
 
-        # OpenCV DNN
-        dnn_age, dnn_gender = self.infer_reference_network(model_path,
+            # OpenCV DNN
+            dnn_age, dnn_gender = self.infer_reference_network(model_path, weights_path, img)
+
+            # OpenCV G-API
+            g_in   = cv.GMat()
+            inputs = cv.GInferInputs()
+            inputs.setInput('data', g_in)
+
+            outputs  = cv.gapi.infer("net", inputs)
+            age_g    = outputs.at("age_conv3")
+            gender_g = outputs.at("prob")
+
+            comp = cv.GComputation(cv.GIn(g_in), cv.GOut(age_g, gender_g))
+            pp = cv.gapi.ie.params("net", model_path, weights_path, device_id)
+
+            gapi_age, gapi_gender = comp.apply(cv.gin(img), args=cv.gapi.compile_args(cv.gapi.networks(pp)))
+
+            # Check
+            self.assertEqual(0.0, cv.norm(dnn_gender, gapi_gender, cv.NORM_INF))
+            self.assertEqual(0.0, cv.norm(dnn_age, gapi_age, cv.NORM_INF))
+
+
+        def test_age_gender_infer_roi(self):
+            # NB: Check IE
+            if not cv.dnn.DNN_TARGET_CPU in cv.dnn.getAvailableTargets(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE):
+                return
+
+            root_path    = '/omz_intel_models/intel/age-gender-recognition-retail-0013/FP32/age-gender-recognition-retail-0013'
+            model_path   = self.find_file(root_path + '.xml',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
+            weights_path = self.find_file(root_path + '.bin',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
+            device_id    = 'CPU'
+
+            img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
+            img = cv.imread(img_path)
+            roi      = (10, 10, 62, 62)
+
+            # OpenCV DNN
+            dnn_age, dnn_gender = self.infer_reference_network(model_path,
+                                                               weights_path,
+                                                               self.make_roi(img, roi))
+
+            # OpenCV G-API
+            g_in   = cv.GMat()
+            g_roi  = cv.GOpaqueT(cv.gapi.CV_RECT)
+            inputs = cv.GInferInputs()
+            inputs.setInput('data', g_in)
+
+            outputs  = cv.gapi.infer("net", g_roi, inputs)
+            age_g    = outputs.at("age_conv3")
+            gender_g = outputs.at("prob")
+
+            comp = cv.GComputation(cv.GIn(g_in, g_roi), cv.GOut(age_g, gender_g))
+            pp = cv.gapi.ie.params("net", model_path, weights_path, device_id)
+
+            gapi_age, gapi_gender = comp.apply(cv.gin(img, roi), args=cv.gapi.compile_args(cv.gapi.networks(pp)))
+
+            # Check
+            self.assertEqual(0.0, cv.norm(dnn_gender, gapi_gender, cv.NORM_INF))
+            self.assertEqual(0.0, cv.norm(dnn_age, gapi_age, cv.NORM_INF))
+
+
+        def test_age_gender_infer_roi_list(self):
+            # NB: Check IE
+            if not cv.dnn.DNN_TARGET_CPU in cv.dnn.getAvailableTargets(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE):
+                return
+
+            root_path    = '/omz_intel_models/intel/age-gender-recognition-retail-0013/FP32/age-gender-recognition-retail-0013'
+            model_path   = self.find_file(root_path + '.xml',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
+            weights_path = self.find_file(root_path + '.bin',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
+            device_id    = 'CPU'
+
+            rois = [(10, 15, 62, 62), (23, 50, 62, 62), (14, 100, 62, 62), (80, 50, 62, 62)]
+            img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
+            img = cv.imread(img_path)
+
+            # OpenCV DNN
+            dnn_age_list    = []
+            dnn_gender_list = []
+            for roi in rois:
+                age, gender = self.infer_reference_network(model_path,
                                                            weights_path,
                                                            self.make_roi(img, roi))
+                dnn_age_list.append(age)
+                dnn_gender_list.append(gender)
 
-        # OpenCV G-API
-        g_in   = cv.GMat()
-        g_roi  = cv.GOpaqueT(cv.gapi.CV_RECT)
-        inputs = cv.GInferInputs()
-        inputs.setInput('data', g_in)
+            # OpenCV G-API
+            g_in   = cv.GMat()
+            g_rois = cv.GArrayT(cv.gapi.CV_RECT)
+            inputs = cv.GInferInputs()
+            inputs.setInput('data', g_in)
 
-        outputs  = cv.gapi.infer("net", g_roi, inputs)
-        age_g    = outputs.at("age_conv3")
-        gender_g = outputs.at("prob")
+            outputs  = cv.gapi.infer("net", g_rois, inputs)
+            age_g    = outputs.at("age_conv3")
+            gender_g = outputs.at("prob")
 
-        comp = cv.GComputation(cv.GIn(g_in, g_roi), cv.GOut(age_g, gender_g))
-        pp = cv.gapi.ie.params("net", model_path, weights_path, device_id)
+            comp = cv.GComputation(cv.GIn(g_in, g_rois), cv.GOut(age_g, gender_g))
+            pp = cv.gapi.ie.params("net", model_path, weights_path, device_id)
 
-        gapi_age, gapi_gender = comp.apply(cv.gin(img, roi), args=cv.compile_args(cv.gapi.networks(pp)))
+            gapi_age_list, gapi_gender_list = comp.apply(cv.gin(img, rois),
+                                                         args=cv.gapi.compile_args(cv.gapi.networks(pp)))
 
-        # Check
-        self.assertEqual(0.0, cv.norm(dnn_gender, gapi_gender, cv.NORM_INF))
-        self.assertEqual(0.0, cv.norm(dnn_age, gapi_age, cv.NORM_INF))
+            # Check
+            for gapi_age, gapi_gender, dnn_age, dnn_gender in zip(gapi_age_list,
+                                                                  gapi_gender_list,
+                                                                  dnn_age_list,
+                                                                  dnn_gender_list):
+                self.assertEqual(0.0, cv.norm(dnn_gender, gapi_gender, cv.NORM_INF))
+                self.assertEqual(0.0, cv.norm(dnn_age, gapi_age, cv.NORM_INF))
 
 
-    def test_age_gender_infer_roi_list(self):
-        # NB: Check IE
-        if not cv.dnn.DNN_TARGET_CPU in cv.dnn.getAvailableTargets(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE):
-            return
+        def test_age_gender_infer2_roi(self):
+            # NB: Check IE
+            if not cv.dnn.DNN_TARGET_CPU in cv.dnn.getAvailableTargets(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE):
+                return
 
-        root_path    = '/omz_intel_models/intel/age-gender-recognition-retail-0013/FP32/age-gender-recognition-retail-0013'
-        model_path   = self.find_file(root_path + '.xml',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
-        weights_path = self.find_file(root_path + '.bin',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
-        device_id    = 'CPU'
+            root_path    = '/omz_intel_models/intel/age-gender-recognition-retail-0013/FP32/age-gender-recognition-retail-0013'
+            model_path   = self.find_file(root_path + '.xml',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
+            weights_path = self.find_file(root_path + '.bin',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
+            device_id    = 'CPU'
 
-        rois = [(10, 15, 62, 62), (23, 50, 62, 62), (14, 100, 62, 62), (80, 50, 62, 62)]
-        img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
-        img = cv.imread(img_path)
+            rois = [(10, 15, 62, 62), (23, 50, 62, 62), (14, 100, 62, 62), (80, 50, 62, 62)]
+            img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
+            img = cv.imread(img_path)
 
-        # OpenCV DNN
-        dnn_age_list    = []
-        dnn_gender_list = []
-        for roi in rois:
-            age, gender = self.infer_reference_network(model_path,
-                                                       weights_path,
-                                                       self.make_roi(img, roi))
-            dnn_age_list.append(age)
-            dnn_gender_list.append(gender)
+            # OpenCV DNN
+            dnn_age_list    = []
+            dnn_gender_list = []
+            for roi in rois:
+                age, gender = self.infer_reference_network(model_path,
+                                                           weights_path,
+                                                           self.make_roi(img, roi))
+                dnn_age_list.append(age)
+                dnn_gender_list.append(gender)
 
-        # OpenCV G-API
-        g_in   = cv.GMat()
-        g_rois = cv.GArrayT(cv.gapi.CV_RECT)
-        inputs = cv.GInferInputs()
-        inputs.setInput('data', g_in)
+            # OpenCV G-API
+            g_in   = cv.GMat()
+            g_rois = cv.GArrayT(cv.gapi.CV_RECT)
+            inputs = cv.GInferListInputs()
+            inputs.setInput('data', g_rois)
 
-        outputs  = cv.gapi.infer("net", g_rois, inputs)
-        age_g    = outputs.at("age_conv3")
-        gender_g = outputs.at("prob")
+            outputs  = cv.gapi.infer2("net", g_in, inputs)
+            age_g    = outputs.at("age_conv3")
+            gender_g = outputs.at("prob")
 
-        comp = cv.GComputation(cv.GIn(g_in, g_rois), cv.GOut(age_g, gender_g))
-        pp = cv.gapi.ie.params("net", model_path, weights_path, device_id)
+            comp = cv.GComputation(cv.GIn(g_in, g_rois), cv.GOut(age_g, gender_g))
+            pp = cv.gapi.ie.params("net", model_path, weights_path, device_id)
 
-        gapi_age_list, gapi_gender_list = comp.apply(cv.gin(img, rois),
-                                                     args=cv.compile_args(cv.gapi.networks(pp)))
+            gapi_age_list, gapi_gender_list = comp.apply(cv.gin(img, rois),
+                                                         args=cv.gapi.compile_args(cv.gapi.networks(pp)))
 
-        # Check
-        for gapi_age, gapi_gender, dnn_age, dnn_gender in zip(gapi_age_list,
-                                                              gapi_gender_list,
-                                                              dnn_age_list,
-                                                              dnn_gender_list):
-            self.assertEqual(0.0, cv.norm(dnn_gender, gapi_gender, cv.NORM_INF))
-            self.assertEqual(0.0, cv.norm(dnn_age, gapi_age, cv.NORM_INF))
-
-
-    def test_age_gender_infer2_roi(self):
-        # NB: Check IE
-        if not cv.dnn.DNN_TARGET_CPU in cv.dnn.getAvailableTargets(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE):
-            return
-
-        root_path    = '/omz_intel_models/intel/age-gender-recognition-retail-0013/FP32/age-gender-recognition-retail-0013'
-        model_path   = self.find_file(root_path + '.xml',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
-        weights_path = self.find_file(root_path + '.bin',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
-        device_id    = 'CPU'
-
-        rois = [(10, 15, 62, 62), (23, 50, 62, 62), (14, 100, 62, 62), (80, 50, 62, 62)]
-        img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
-        img = cv.imread(img_path)
-
-        # OpenCV DNN
-        dnn_age_list    = []
-        dnn_gender_list = []
-        for roi in rois:
-            age, gender = self.infer_reference_network(model_path,
-                                                       weights_path,
-                                                       self.make_roi(img, roi))
-            dnn_age_list.append(age)
-            dnn_gender_list.append(gender)
-
-        # OpenCV G-API
-        g_in   = cv.GMat()
-        g_rois = cv.GArrayT(cv.gapi.CV_RECT)
-        inputs = cv.GInferListInputs()
-        inputs.setInput('data', g_rois)
-
-        outputs  = cv.gapi.infer2("net", g_in, inputs)
-        age_g    = outputs.at("age_conv3")
-        gender_g = outputs.at("prob")
-
-        comp = cv.GComputation(cv.GIn(g_in, g_rois), cv.GOut(age_g, gender_g))
-        pp = cv.gapi.ie.params("net", model_path, weights_path, device_id)
-
-        gapi_age_list, gapi_gender_list = comp.apply(cv.gin(img, rois),
-                                                     args=cv.compile_args(cv.gapi.networks(pp)))
-
-        # Check
-        for gapi_age, gapi_gender, dnn_age, dnn_gender in zip(gapi_age_list,
-                                                              gapi_gender_list,
-                                                              dnn_age_list,
-                                                              dnn_gender_list):
-            self.assertEqual(0.0, cv.norm(dnn_gender, gapi_gender, cv.NORM_INF))
-            self.assertEqual(0.0, cv.norm(dnn_age, gapi_age, cv.NORM_INF))
+            # Check
+            for gapi_age, gapi_gender, dnn_age, dnn_gender in zip(gapi_age_list,
+                                                                  gapi_gender_list,
+                                                                  dnn_age_list,
+                                                                  dnn_gender_list):
+                self.assertEqual(0.0, cv.norm(dnn_gender, gapi_gender, cv.NORM_INF))
+                self.assertEqual(0.0, cv.norm(dnn_age, gapi_age, cv.NORM_INF))
 
 
 
-    def test_person_detection_retail_0013(self):
-        # NB: Check IE
-        if not cv.dnn.DNN_TARGET_CPU in cv.dnn.getAvailableTargets(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE):
-            return
+        def test_person_detection_retail_0013(self):
+            # NB: Check IE
+            if not cv.dnn.DNN_TARGET_CPU in cv.dnn.getAvailableTargets(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE):
+                return
 
-        root_path    = '/omz_intel_models/intel/person-detection-retail-0013/FP32/person-detection-retail-0013'
-        model_path   = self.find_file(root_path + '.xml',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
-        weights_path = self.find_file(root_path + '.bin',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
-        img_path     = self.find_file('gpu/lbpcascade/er.png', [os.environ.get('OPENCV_TEST_DATA_PATH')])
-        device_id    = 'CPU'
-        img          = cv.resize(cv.imread(img_path), (544, 320))
+            root_path    = '/omz_intel_models/intel/person-detection-retail-0013/FP32/person-detection-retail-0013'
+            model_path   = self.find_file(root_path + '.xml',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
+            weights_path = self.find_file(root_path + '.bin',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
+            img_path     = self.find_file('gpu/lbpcascade/er.png', [os.environ.get('OPENCV_TEST_DATA_PATH')])
+            device_id    = 'CPU'
+            img          = cv.resize(cv.imread(img_path), (544, 320))
 
-        # OpenCV DNN
-        net = cv.dnn.readNetFromModelOptimizer(model_path, weights_path)
-        net.setPreferableBackend(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE)
-        net.setPreferableTarget(cv.dnn.DNN_TARGET_CPU)
+            # OpenCV DNN
+            net = cv.dnn.readNetFromModelOptimizer(model_path, weights_path)
+            net.setPreferableBackend(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE)
+            net.setPreferableTarget(cv.dnn.DNN_TARGET_CPU)
 
-        blob = cv.dnn.blobFromImage(img)
+            blob = cv.dnn.blobFromImage(img)
 
-        def parseSSD(detections, size):
-            h, w = size
-            bboxes = []
-            detections = detections.reshape(-1, 7)
-            for sample_id, class_id, confidence, xmin, ymin, xmax, ymax in detections:
-                if confidence >= 0.5:
-                    x      = int(xmin * w)
-                    y      = int(ymin * h)
-                    width  = int(xmax * w - x)
-                    height = int(ymax * h - y)
-                    bboxes.append((x, y, width, height))
+            def parseSSD(detections, size):
+                h, w = size
+                bboxes = []
+                detections = detections.reshape(-1, 7)
+                for sample_id, class_id, confidence, xmin, ymin, xmax, ymax in detections:
+                    if confidence >= 0.5:
+                        x      = int(xmin * w)
+                        y      = int(ymin * h)
+                        width  = int(xmax * w - x)
+                        height = int(ymax * h - y)
+                        bboxes.append((x, y, width, height))
 
-            return bboxes
+                return bboxes
 
-        net.setInput(blob)
-        dnn_detections = net.forward()
-        dnn_boxes = parseSSD(np.array(dnn_detections), img.shape[:2])
+            net.setInput(blob)
+            dnn_detections = net.forward()
+            dnn_boxes = parseSSD(np.array(dnn_detections), img.shape[:2])
 
-        # OpenCV G-API
-        g_in   = cv.GMat()
-        inputs = cv.GInferInputs()
-        inputs.setInput('data', g_in)
+            # OpenCV G-API
+            g_in   = cv.GMat()
+            inputs = cv.GInferInputs()
+            inputs.setInput('data', g_in)
 
-        g_sz       = cv.gapi.streaming.size(g_in)
-        outputs    = cv.gapi.infer("net", inputs)
-        detections = outputs.at("detection_out")
-        bboxes     = cv.gapi.parseSSD(detections, g_sz, 0.5, False, False)
+            g_sz       = cv.gapi.streaming.size(g_in)
+            outputs    = cv.gapi.infer("net", inputs)
+            detections = outputs.at("detection_out")
+            bboxes     = cv.gapi.parseSSD(detections, g_sz, 0.5, False, False)
 
-        comp = cv.GComputation(cv.GIn(g_in), cv.GOut(bboxes))
-        pp = cv.gapi.ie.params("net", model_path, weights_path, device_id)
+            comp = cv.GComputation(cv.GIn(g_in), cv.GOut(bboxes))
+            pp = cv.gapi.ie.params("net", model_path, weights_path, device_id)
 
-        gapi_age, gapi_gender = comp.apply(cv.gin(img), args=cv.compile_args(cv.gapi.networks(pp)))
+            gapi_boxes = comp.apply(cv.gin(img.astype(np.float32)),
+                                    args=cv.gapi.compile_args(cv.gapi.networks(pp)))
 
-        gapi_boxes = comp.apply(cv.gin(img.astype(np.float32)),
-                                args=cv.compile_args(cv.gapi.networks(pp)))
-
-        # Comparison
-        self.assertEqual(0.0, cv.norm(np.array(dnn_boxes).flatten(),
-                                      np.array(gapi_boxes).flatten(),
-                                      cv.NORM_INF))
+            # Comparison
+            self.assertEqual(0.0, cv.norm(np.array(dnn_boxes).flatten(),
+                                          np.array(gapi_boxes).flatten(),
+                                          cv.NORM_INF))
 
 
-    def test_person_detection_retail_0013(self):
-        # NB: Check IE
-        if not cv.dnn.DNN_TARGET_CPU in cv.dnn.getAvailableTargets(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE):
-            return
+        def test_person_detection_retail_0013(self):
+            # NB: Check IE
+            if not cv.dnn.DNN_TARGET_CPU in cv.dnn.getAvailableTargets(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE):
+                return
 
-        root_path    = '/omz_intel_models/intel/person-detection-retail-0013/FP32/person-detection-retail-0013'
-        model_path   = self.find_file(root_path + '.xml',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
-        weights_path = self.find_file(root_path + '.bin',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
-        img_path     = self.find_file('gpu/lbpcascade/er.png', [os.environ.get('OPENCV_TEST_DATA_PATH')])
-        device_id    = 'CPU'
-        img          = cv.resize(cv.imread(img_path), (544, 320))
+            root_path    = '/omz_intel_models/intel/person-detection-retail-0013/FP32/person-detection-retail-0013'
+            model_path   = self.find_file(root_path + '.xml',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
+            weights_path = self.find_file(root_path + '.bin',   [os.environ.get('OPENCV_DNN_TEST_DATA_PATH')])
+            img_path     = self.find_file('gpu/lbpcascade/er.png', [os.environ.get('OPENCV_TEST_DATA_PATH')])
+            device_id    = 'CPU'
+            img          = cv.resize(cv.imread(img_path), (544, 320))
 
-        # OpenCV DNN
-        net = cv.dnn.readNetFromModelOptimizer(model_path, weights_path)
-        net.setPreferableBackend(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE)
-        net.setPreferableTarget(cv.dnn.DNN_TARGET_CPU)
+            # OpenCV DNN
+            net = cv.dnn.readNetFromModelOptimizer(model_path, weights_path)
+            net.setPreferableBackend(cv.dnn.DNN_BACKEND_INFERENCE_ENGINE)
+            net.setPreferableTarget(cv.dnn.DNN_TARGET_CPU)
 
-        blob = cv.dnn.blobFromImage(img)
+            blob = cv.dnn.blobFromImage(img)
 
-        def parseSSD(detections, size):
-            h, w = size
-            bboxes = []
-            detections = detections.reshape(-1, 7)
-            for sample_id, class_id, confidence, xmin, ymin, xmax, ymax in detections:
-                if confidence >= 0.5:
-                    x      = int(xmin * w)
-                    y      = int(ymin * h)
-                    width  = int(xmax * w - x)
-                    height = int(ymax * h - y)
-                    bboxes.append((x, y, width, height))
+            def parseSSD(detections, size):
+                h, w = size
+                bboxes = []
+                detections = detections.reshape(-1, 7)
+                for sample_id, class_id, confidence, xmin, ymin, xmax, ymax in detections:
+                    if confidence >= 0.5:
+                        x      = int(xmin * w)
+                        y      = int(ymin * h)
+                        width  = int(xmax * w - x)
+                        height = int(ymax * h - y)
+                        bboxes.append((x, y, width, height))
 
-            return bboxes
+                return bboxes
 
-        net.setInput(blob)
-        dnn_detections = net.forward()
-        dnn_boxes = parseSSD(np.array(dnn_detections), img.shape[:2])
+            net.setInput(blob)
+            dnn_detections = net.forward()
+            dnn_boxes = parseSSD(np.array(dnn_detections), img.shape[:2])
 
-        # OpenCV G-API
-        g_in   = cv.GMat()
-        inputs = cv.GInferInputs()
-        inputs.setInput('data', g_in)
+            # OpenCV G-API
+            g_in   = cv.GMat()
+            inputs = cv.GInferInputs()
+            inputs.setInput('data', g_in)
 
-        g_sz       = cv.gapi.streaming.size(g_in)
-        outputs    = cv.gapi.infer("net", inputs)
-        detections = outputs.at("detection_out")
-        bboxes     = cv.gapi.parseSSD(detections, g_sz, 0.5, False, False)
+            g_sz       = cv.gapi.streaming.size(g_in)
+            outputs    = cv.gapi.infer("net", inputs)
+            detections = outputs.at("detection_out")
+            bboxes     = cv.gapi.parseSSD(detections, g_sz, 0.5, False, False)
 
-        comp = cv.GComputation(cv.GIn(g_in), cv.GOut(bboxes))
-        pp = cv.gapi.ie.params("net", model_path, weights_path, device_id)
+            comp = cv.GComputation(cv.GIn(g_in), cv.GOut(bboxes))
+            pp = cv.gapi.ie.params("net", model_path, weights_path, device_id)
 
-        gapi_boxes = comp.apply(cv.gin(img.astype(np.float32)),
-                                args=cv.compile_args(cv.gapi.networks(pp)))
+            gapi_boxes = comp.apply(cv.gin(img.astype(np.float32)),
+                                    args=cv.gapi.compile_args(cv.gapi.networks(pp)))
 
-        # Comparison
-        self.assertEqual(0.0, cv.norm(np.array(dnn_boxes).flatten(),
-                                      np.array(gapi_boxes).flatten(),
-                                      cv.NORM_INF))
+            # Comparison
+            self.assertEqual(0.0, cv.norm(np.array(dnn_boxes).flatten(),
+                                          np.array(gapi_boxes).flatten(),
+                                          cv.NORM_INF))
+
+
+except unittest.SkipTest as e:
+
+    message = str(e)
+
+    class TestSkip(unittest.TestCase):
+        def setUp(self):
+            self.skipTest('Skip tests: ' + message)
+
+        def test_skip():
+            pass
+
+    pass
 
 
 if __name__ == '__main__':

modules/gapi/misc/python/test/test_gapi_render.py

@@ -0,0 +1,227 @@
+#!/usr/bin/env python
+
+import numpy as np
+import cv2 as cv
+import os
+import sys
+import unittest
+
+from tests_common import NewOpenCVTests
+
+try:
+
+    if sys.version_info[:2] < (3, 0):
+        raise unittest.SkipTest('Python 2.x is not supported')
+
+    # FIXME: FText isn't supported yet.
+    class gapi_render_test(NewOpenCVTests):
+        def __init__(self, *args):
+            super().__init__(*args)
+
+            self.size = (300, 300, 3)
+
+            # Rect
+            self.rect = (30, 30, 50, 50)
+            self.rcolor = (0, 255, 0)
+            self.rlt = cv.LINE_4
+            self.rthick = 2
+            self.rshift = 3
+
+            # Text
+            self.text = 'Hello, world!'
+            self.org = (100, 100)
+            self.ff = cv.FONT_HERSHEY_SIMPLEX
+            self.fs = 1.0
+            self.tthick = 2
+            self.tlt = cv.LINE_8
+            self.tcolor = (255, 255, 255)
+            self.blo = False
+
+            # Circle
+            self.center = (200, 200)
+            self.radius = 200
+            self.ccolor = (255, 255, 0)
+            self.cthick = 2
+            self.clt = cv.LINE_4
+            self.cshift = 1
+
+            # Line
+            self.pt1 = (50, 50)
+            self.pt2 = (200, 200)
+            self.lcolor = (0, 255, 128)
+            self.lthick = 5
+            self.llt = cv.LINE_8
+            self.lshift = 2
+
+            # Poly
+            self.pts = [(50, 100), (100, 200), (25, 250)]
+            self.pcolor = (0, 0, 255)
+            self.pthick = 3
+            self.plt = cv.LINE_4
+            self.pshift = 1
+
+            # Image
+            self.iorg = (150, 150)
+            img_path = self.find_file('cv/face/david2.jpg', [os.environ.get('OPENCV_TEST_DATA_PATH')])
+            self.img = cv.resize(cv.imread(img_path), (50, 50))
+            self.alpha = np.full(self.img.shape[:2], 0.8, dtype=np.float32)
+
+            # Mosaic
+            self.mos = (100, 100, 100, 100)
+            self.cell_sz = 25
+            self.decim = 0
+
+            # Render primitives
+            self.prims = [cv.gapi.wip.draw.Rect(self.rect, self.rcolor, self.rthick, self.rlt, self.rshift),
+                          cv.gapi.wip.draw.Text(self.text, self.org, self.ff, self.fs, self.tcolor, self.tthick, self.tlt, self.blo),
+                          cv.gapi.wip.draw.Circle(self.center, self.radius, self.ccolor, self.cthick, self.clt, self.cshift),
+                          cv.gapi.wip.draw.Line(self.pt1, self.pt2, self.lcolor, self.lthick, self.llt, self.lshift),
+                          cv.gapi.wip.draw.Mosaic(self.mos, self.cell_sz, self.decim),
+                          cv.gapi.wip.draw.Image(self.iorg, self.img, self.alpha),
+                          cv.gapi.wip.draw.Poly(self.pts, self.pcolor, self.pthick, self.plt, self.pshift)]
+
+        def cvt_nv12_to_yuv(self, y, uv):
+            h,w,_ = uv.shape
+            upsample_uv = cv.resize(uv, (h * 2, w * 2))
+            return cv.merge([y, upsample_uv])
+
+        def cvt_yuv_to_nv12(self, yuv, y_out, uv_out):
+            chs = cv.split(yuv, [y_out, None, None])
+            uv = cv.merge([chs[1], chs[2]])
+            uv_out = cv.resize(uv, (uv.shape[0] // 2, uv.shape[1] // 2), dst=uv_out)
+            return y_out, uv_out
+
+        def cvt_bgr_to_yuv_color(self, bgr):
+            y = bgr[2] *  0.299000 + bgr[1] *  0.587000 + bgr[0] *  0.114000;
+            u = bgr[2] * -0.168736 + bgr[1] * -0.331264 + bgr[0] *  0.500000 + 128;
+            v = bgr[2] *  0.500000 + bgr[1] * -0.418688 + bgr[0] * -0.081312 + 128;
+            return (y, u, v)
+
+        def blend_img(self, background, org, img, alpha):
+            x, y = org
+            h, w, _ = img.shape
+            roi_img = background[x:x+w, y:y+h, :]
+            img32f_w = cv.merge([alpha] * 3).astype(np.float32)
+            roi32f_w = np.full(roi_img.shape, 1.0, dtype=np.float32)
+            roi32f_w -= img32f_w
+            img32f = (img / 255).astype(np.float32)
+            roi32f = (roi_img / 255).astype(np.float32)
+            cv.multiply(img32f, img32f_w, dst=img32f)
+            cv.multiply(roi32f, roi32f_w, dst=roi32f)
+            roi32f += img32f
+            roi_img[...] = np.round(roi32f * 255)
+
+        # This is quite naive implementations used as a simple reference
+        # doesn't consider corner cases.
+        def draw_mosaic(self, img, mos, cell_sz, decim):
+            x,y,w,h = mos
+            mosaic_area = img[x:x+w, y:y+h, :]
+            for i in range(0, mosaic_area.shape[0], cell_sz):
+                for j in range(0, mosaic_area.shape[1], cell_sz):
+                    cell_roi = mosaic_area[j:j+cell_sz, i:i+cell_sz, :]
+                    s0, s1, s2 = cv.mean(cell_roi)[:3]
+                    mosaic_area[j:j+cell_sz, i:i+cell_sz] = (round(s0), round(s1), round(s2))
+
+        def render_primitives_bgr_ref(self, img):
+            cv.rectangle(img, self.rect, self.rcolor, self.rthick, self.rlt, self.rshift)
+            cv.putText(img, self.text, self.org, self.ff, self.fs, self.tcolor, self.tthick, self.tlt, self.blo)
+            cv.circle(img, self.center, self.radius, self.ccolor, self.cthick, self.clt, self.cshift)
+            cv.line(img, self.pt1, self.pt2, self.lcolor, self.lthick, self.llt, self.lshift)
+            cv.fillPoly(img, np.expand_dims(np.array([self.pts]), axis=0), self.pcolor, self.plt, self.pshift)
+            self.draw_mosaic(img, self.mos, self.cell_sz, self.decim)
+            self.blend_img(img, self.iorg, self.img, self.alpha)
+
+        def render_primitives_nv12_ref(self, y_plane, uv_plane):
+            yuv = self.cvt_nv12_to_yuv(y_plane, uv_plane)
+            cv.rectangle(yuv, self.rect, self.cvt_bgr_to_yuv_color(self.rcolor), self.rthick, self.rlt, self.rshift)
+            cv.putText(yuv, self.text, self.org, self.ff, self.fs, self.cvt_bgr_to_yuv_color(self.tcolor), self.tthick, self.tlt, self.blo)
+            cv.circle(yuv, self.center, self.radius, self.cvt_bgr_to_yuv_color(self.ccolor), self.cthick, self.clt, self.cshift)
+            cv.line(yuv, self.pt1, self.pt2, self.cvt_bgr_to_yuv_color(self.lcolor), self.lthick, self.llt, self.lshift)
+            cv.fillPoly(yuv, np.expand_dims(np.array([self.pts]), axis=0), self.cvt_bgr_to_yuv_color(self.pcolor), self.plt, self.pshift)
+            self.draw_mosaic(yuv, self.mos, self.cell_sz, self.decim)
+            self.blend_img(yuv, self.iorg, cv.cvtColor(self.img, cv.COLOR_BGR2YUV), self.alpha)
+            self.cvt_yuv_to_nv12(yuv, y_plane, uv_plane)
+
+        def test_render_primitives_on_bgr_graph(self):
+            expected = np.zeros(self.size, dtype=np.uint8)
+            actual = np.array(expected, copy=True)
+
+            # OpenCV
+            self.render_primitives_bgr_ref(expected)
+
+            # G-API
+            g_in = cv.GMat()
+            g_prims = cv.GArray.Prim()
+            g_out = cv.gapi.wip.draw.render3ch(g_in, g_prims)
+
+
+            comp = cv.GComputation(cv.GIn(g_in, g_prims), cv.GOut(g_out))
+            actual = comp.apply(cv.gin(actual, self.prims))
+
+            self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF))
+
+        def test_render_primitives_on_bgr_function(self):
+            expected = np.zeros(self.size, dtype=np.uint8)
+            actual = np.array(expected, copy=True)
+
+            # OpenCV
+            self.render_primitives_bgr_ref(expected)
+
+            # G-API
+            cv.gapi.wip.draw.render(actual, self.prims)
+            self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF))
+
+        def test_render_primitives_on_nv12_graph(self):
+            y_expected = np.zeros((self.size[0], self.size[1], 1), dtype=np.uint8)
+            uv_expected = np.zeros((self.size[0] // 2, self.size[1] // 2, 2), dtype=np.uint8)
+
+            y_actual = np.array(y_expected, copy=True)
+            uv_actual = np.array(uv_expected, copy=True)
+
+            # OpenCV
+            self.render_primitives_nv12_ref(y_expected, uv_expected)
+
+            # G-API
+            g_y = cv.GMat()
+            g_uv = cv.GMat()
+            g_prims = cv.GArray.Prim()
+            g_out_y, g_out_uv = cv.gapi.wip.draw.renderNV12(g_y, g_uv, g_prims)
+
+            comp = cv.GComputation(cv.GIn(g_y, g_uv, g_prims), cv.GOut(g_out_y, g_out_uv))
+            y_actual, uv_actual = comp.apply(cv.gin(y_actual, uv_actual, self.prims))
+
+            self.assertEqual(0.0, cv.norm(y_expected, y_actual, cv.NORM_INF))
+            self.assertEqual(0.0, cv.norm(uv_expected, uv_actual, cv.NORM_INF))
+
+        def test_render_primitives_on_nv12_function(self):
+            y_expected = np.zeros((self.size[0], self.size[1], 1), dtype=np.uint8)
+            uv_expected = np.zeros((self.size[0] // 2, self.size[1] // 2, 2), dtype=np.uint8)
+
+            y_actual = np.array(y_expected, copy=True)
+            uv_actual = np.array(uv_expected, copy=True)
+
+            # OpenCV
+            self.render_primitives_nv12_ref(y_expected, uv_expected)
+
+            # G-API
+            cv.gapi.wip.draw.render(y_actual, uv_actual, self.prims)
+
+            self.assertEqual(0.0, cv.norm(y_expected, y_actual, cv.NORM_INF))
+            self.assertEqual(0.0, cv.norm(uv_expected, uv_actual, cv.NORM_INF))
+
+
+except unittest.SkipTest as e:
+
+    message = str(e)
+
+    class TestSkip(unittest.TestCase):
+        def setUp(self):
+            self.skipTest('Skip tests: ' + message)
+
+        def test_skip():
+            pass
+
+    pass
+
+if __name__ == '__main__':
+    NewOpenCVTests.bootstrap()

modules/gapi/misc/python/test/test_gapi_sample_pipelines.py

@@ -225,7 +225,7 @@ try:
             comp = cv.GComputation(cv.GIn(g_in1, g_in2), cv.GOut(g_out))
 
             pkg = cv.gapi.kernels(GAddImpl)
-            actual = comp.apply(cv.gin(in_mat1, in_mat2), args=cv.compile_args(pkg))
+            actual = comp.apply(cv.gin(in_mat1, in_mat2), args=cv.gapi.compile_args(pkg))
 
             self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF))
 
@@ -245,7 +245,7 @@ try:
             comp = cv.GComputation(cv.GIn(g_in), cv.GOut(g_ch1, g_ch2, g_ch3))
 
             pkg = cv.gapi.kernels(GSplit3Impl)
-            ch1, ch2, ch3 = comp.apply(cv.gin(in_mat), args=cv.compile_args(pkg))
+            ch1, ch2, ch3 = comp.apply(cv.gin(in_mat), args=cv.gapi.compile_args(pkg))
 
             self.assertEqual(0.0, cv.norm(in_ch1, ch1, cv.NORM_INF))
             self.assertEqual(0.0, cv.norm(in_ch2, ch2, cv.NORM_INF))
@@ -266,7 +266,7 @@ try:
             comp = cv.GComputation(g_in, g_out)
 
             pkg    = cv.gapi.kernels(GMeanImpl)
-            actual = comp.apply(cv.gin(in_mat), args=cv.compile_args(pkg))
+            actual = comp.apply(cv.gin(in_mat), args=cv.gapi.compile_args(pkg))
 
             # Comparison
             self.assertEqual(expected, actual)
@@ -287,7 +287,7 @@ try:
             comp  = cv.GComputation(cv.GIn(g_in, g_sc), cv.GOut(g_out))
 
             pkg = cv.gapi.kernels(GAddCImpl)
-            actual = comp.apply(cv.gin(in_mat, sc), args=cv.compile_args(pkg))
+            actual = comp.apply(cv.gin(in_mat, sc), args=cv.gapi.compile_args(pkg))
 
             self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF))
 
@@ -305,7 +305,7 @@ try:
             comp = cv.GComputation(cv.GIn(g_in), cv.GOut(g_sz))
 
             pkg = cv.gapi.kernels(GSizeImpl)
-            actual = comp.apply(cv.gin(in_mat), args=cv.compile_args(pkg))
+            actual = comp.apply(cv.gin(in_mat), args=cv.gapi.compile_args(pkg))
 
             self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF))
 
@@ -322,7 +322,7 @@ try:
             comp = cv.GComputation(cv.GIn(g_r), cv.GOut(g_sz))
 
             pkg = cv.gapi.kernels(GSizeRImpl)
-            actual = comp.apply(cv.gin(roi), args=cv.compile_args(pkg))
+            actual = comp.apply(cv.gin(roi), args=cv.gapi.compile_args(pkg))
 
             # cv.norm works with tuples ?
             self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF))
@@ -340,7 +340,7 @@ try:
             comp  = cv.GComputation(cv.GIn(g_pts), cv.GOut(g_br))
 
             pkg = cv.gapi.kernels(GBoundingRectImpl)
-            actual = comp.apply(cv.gin(points), args=cv.compile_args(pkg))
+            actual = comp.apply(cv.gin(points), args=cv.gapi.compile_args(pkg))
 
             # cv.norm works with tuples ?
             self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF))
@@ -371,7 +371,7 @@ try:
 
             comp = cv.GComputation(cv.GIn(g_in), cv.GOut(g_out))
             pkg = cv.gapi.kernels(GGoodFeaturesImpl)
-            actual = comp.apply(cv.gin(in_mat), args=cv.compile_args(pkg))
+            actual = comp.apply(cv.gin(in_mat), args=cv.gapi.compile_args(pkg))
 
             # NB: OpenCV & G-API have different output types.
             # OpenCV - numpy array with shape (num_points, 1, 2)
@@ -453,10 +453,10 @@ try:
             g_in  = cv.GArray.Int()
             comp  = cv.GComputation(cv.GIn(g_in), cv.GOut(GSum.on(g_in)))
 
-            s = comp.apply(cv.gin([1, 2, 3, 4]), args=cv.compile_args(cv.gapi.kernels(GSumImpl)))
+            s = comp.apply(cv.gin([1, 2, 3, 4]), args=cv.gapi.compile_args(cv.gapi.kernels(GSumImpl)))
             self.assertEqual(10, s)
 
-            s = comp.apply(cv.gin([1, 2, 8, 7]), args=cv.compile_args(cv.gapi.kernels(GSumImpl)))
+            s = comp.apply(cv.gin([1, 2, 8, 7]), args=cv.gapi.compile_args(cv.gapi.kernels(GSumImpl)))
             self.assertEqual(18, s)
 
             self.assertEqual(18, GSumImpl.last_result)
@@ -488,13 +488,13 @@ try:
                         'tuple': (42, 42)
                     }
 
-            out = comp.apply(cv.gin(table, 'int'), args=cv.compile_args(cv.gapi.kernels(GLookUpImpl)))
+            out = comp.apply(cv.gin(table, 'int'), args=cv.gapi.compile_args(cv.gapi.kernels(GLookUpImpl)))
             self.assertEqual(42, out)
 
-            out = comp.apply(cv.gin(table, 'str'), args=cv.compile_args(cv.gapi.kernels(GLookUpImpl)))
+            out = comp.apply(cv.gin(table, 'str'), args=cv.gapi.compile_args(cv.gapi.kernels(GLookUpImpl)))
             self.assertEqual('hello, world!', out)
 
-            out = comp.apply(cv.gin(table, 'tuple'), args=cv.compile_args(cv.gapi.kernels(GLookUpImpl)))
+            out = comp.apply(cv.gin(table, 'tuple'), args=cv.gapi.compile_args(cv.gapi.kernels(GLookUpImpl)))
             self.assertEqual((42, 42), out)
 
 
@@ -521,7 +521,7 @@ try:
             arr1 = [3,    'str']
 
             out = comp.apply(cv.gin(arr0, arr1),
-                             args=cv.compile_args(cv.gapi.kernels(GConcatImpl)))
+                             args=cv.gapi.compile_args(cv.gapi.kernels(GConcatImpl)))
 
             self.assertEqual(arr0 + arr1, out)
 
@@ -550,7 +550,7 @@ try:
             img1 = np.array([1, 2, 3])
 
             with self.assertRaises(Exception): comp.apply(cv.gin(img0, img1),
-                                                          args=cv.compile_args(
+                                                          args=cv.gapi.compile_args(
                                                               cv.gapi.kernels(GAddImpl)))
 
 
@@ -577,7 +577,7 @@ try:
             img1 = np.array([1, 2, 3])
 
             with self.assertRaises(Exception): comp.apply(cv.gin(img0, img1),
-                                                          args=cv.compile_args(
+                                                          args=cv.gapi.compile_args(
                                                               cv.gapi.kernels(GAddImpl)))
 
 
@@ -607,7 +607,7 @@ try:
             # FIXME: Cause Bad variant access.
             # Need to provide more descriptive error messsage.
             with self.assertRaises(Exception): comp.apply(cv.gin(img0, img1),
-                                                          args=cv.compile_args(
+                                                          args=cv.gapi.compile_args(
                                                               cv.gapi.kernels(GAddImpl)))
 
         def test_pipeline_with_custom_kernels(self):
@@ -657,7 +657,7 @@ try:
             g_mean       = cv.gapi.mean(g_transposed)
 
             comp = cv.GComputation(cv.GIn(g_bgr), cv.GOut(g_mean))
-            actual = comp.apply(cv.gin(img), args=cv.compile_args(
+            actual = comp.apply(cv.gin(img), args=cv.gapi.compile_args(
                 cv.gapi.kernels(GResizeImpl, GTransposeImpl)))
 
             self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF))

modules/gapi/misc/python/test/test_gapi_streaming.py

@@ -3,201 +3,367 @@
 import numpy as np
 import cv2 as cv
 import os
+import sys
+import unittest
+import time
 
 from tests_common import NewOpenCVTests
 
-class test_gapi_streaming(NewOpenCVTests):
 
-    def test_image_input(self):
-        sz = (1280, 720)
-        in_mat = np.random.randint(0, 100, sz).astype(np.uint8)
-
-        # OpenCV
-        expected = cv.medianBlur(in_mat, 3)
-
-        # G-API
-        g_in = cv.GMat()
-        g_out = cv.gapi.medianBlur(g_in, 3)
-        c = cv.GComputation(g_in, g_out)
-        ccomp = c.compileStreaming(cv.descr_of(in_mat))
-        ccomp.setSource(cv.gin(in_mat))
-        ccomp.start()
-
-        _, actual = ccomp.pull()
-
-        # Assert
-        self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF))
+try:
+    if sys.version_info[:2] < (3, 0):
+        raise unittest.SkipTest('Python 2.x is not supported')
 
 
-    def test_video_input(self):
-        ksize = 3
-        path = self.find_file('cv/video/768x576.avi', [os.environ['OPENCV_TEST_DATA_PATH']])
+    @cv.gapi.op('custom.delay', in_types=[cv.GMat], out_types=[cv.GMat])
+    class GDelay:
+        """Delay for 10 ms."""
 
-        # OpenCV
-        cap = cv.VideoCapture(path)
-
-        # G-API
-        g_in = cv.GMat()
-        g_out = cv.gapi.medianBlur(g_in, ksize)
-        c = cv.GComputation(g_in, g_out)
-
-        ccomp = c.compileStreaming()
-        source = cv.gapi.wip.make_capture_src(path)
-        ccomp.setSource(source)
-        ccomp.start()
-
-        # Assert
-        max_num_frames  = 10
-        proc_num_frames = 0
-        while cap.isOpened():
-            has_expected, expected = cap.read()
-            has_actual,   actual   = ccomp.pull()
-
-            self.assertEqual(has_expected, has_actual)
-
-            if not has_actual:
-                break
-
-            self.assertEqual(0.0, cv.norm(cv.medianBlur(expected, ksize), actual, cv.NORM_INF))
-
-            proc_num_frames += 1
-            if proc_num_frames == max_num_frames:
-                break;
+        @staticmethod
+        def outMeta(desc):
+            return desc
 
 
-    def test_video_split3(self):
-        path = self.find_file('cv/video/768x576.avi', [os.environ['OPENCV_TEST_DATA_PATH']])
+    @cv.gapi.kernel(GDelay)
+    class GDelayImpl:
+        """Implementation for GDelay operation."""
 
-        # OpenCV
-        cap = cv.VideoCapture(path)
-
-        # G-API
-        g_in = cv.GMat()
-        b, g, r = cv.gapi.split3(g_in)
-        c = cv.GComputation(cv.GIn(g_in), cv.GOut(b, g, r))
-
-        ccomp = c.compileStreaming()
-        source = cv.gapi.wip.make_capture_src(path)
-        ccomp.setSource(source)
-        ccomp.start()
-
-        # Assert
-        max_num_frames  = 10
-        proc_num_frames = 0
-        while cap.isOpened():
-            has_expected, frame = cap.read()
-            has_actual,   actual   = ccomp.pull()
-
-            self.assertEqual(has_expected, has_actual)
-
-            if not has_actual:
-                break
-
-            expected = cv.split(frame)
-            for e, a in zip(expected, actual):
-                self.assertEqual(0.0, cv.norm(e, a, cv.NORM_INF))
-
-            proc_num_frames += 1
-            if proc_num_frames == max_num_frames:
-                break;
+        @staticmethod
+        def run(img):
+            time.sleep(0.01)
+            return img
 
 
-    def test_video_add(self):
-        sz = (576, 768, 3)
-        in_mat = np.random.randint(0, 100, sz).astype(np.uint8)
+    class test_gapi_streaming(NewOpenCVTests):
 
-        path = self.find_file('cv/video/768x576.avi', [os.environ['OPENCV_TEST_DATA_PATH']])
-
-        # OpenCV
-        cap = cv.VideoCapture(path)
-
-        # G-API
-        g_in1 = cv.GMat()
-        g_in2 = cv.GMat()
-        out = cv.gapi.add(g_in1, g_in2)
-        c = cv.GComputation(cv.GIn(g_in1, g_in2), cv.GOut(out))
-
-        ccomp = c.compileStreaming()
-        source = cv.gapi.wip.make_capture_src(path)
-        ccomp.setSource(cv.gin(source, in_mat))
-        ccomp.start()
-
-        # Assert
-        max_num_frames  = 10
-        proc_num_frames = 0
-        while cap.isOpened():
-            has_expected, frame  = cap.read()
-            has_actual,   actual = ccomp.pull()
-
-            self.assertEqual(has_expected, has_actual)
-
-            if not has_actual:
-                break
-
-            expected = cv.add(frame, in_mat)
-            self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF))
-
-            proc_num_frames += 1
-            if proc_num_frames == max_num_frames:
-                break;
-
-
-    def test_video_good_features_to_track(self):
-        path = self.find_file('cv/video/768x576.avi', [os.environ['OPENCV_TEST_DATA_PATH']])
-
-        # NB: goodFeaturesToTrack configuration
-        max_corners         = 50
-        quality_lvl         = 0.01
-        min_distance        = 10
-        block_sz            = 3
-        use_harris_detector = True
-        k                   = 0.04
-        mask                = None
-
-        # OpenCV
-        cap = cv.VideoCapture(path)
-
-        # G-API
-        g_in = cv.GMat()
-        g_gray = cv.gapi.RGB2Gray(g_in)
-        g_out = cv.gapi.goodFeaturesToTrack(g_gray, max_corners, quality_lvl,
-                                            min_distance, mask, block_sz, use_harris_detector, k)
-
-        c = cv.GComputation(cv.GIn(g_in), cv.GOut(g_out))
-
-        ccomp = c.compileStreaming()
-        source = cv.gapi.wip.make_capture_src(path)
-        ccomp.setSource(source)
-        ccomp.start()
-
-        # Assert
-        max_num_frames  = 10
-        proc_num_frames = 0
-        while cap.isOpened():
-            has_expected, frame  = cap.read()
-            has_actual,   actual = ccomp.pull()
-
-            self.assertEqual(has_expected, has_actual)
-
-            if not has_actual:
-                break
+        def test_image_input(self):
+            sz = (1280, 720)
+            in_mat = np.random.randint(0, 100, sz).astype(np.uint8)
 
             # OpenCV
-            frame = cv.cvtColor(frame, cv.COLOR_RGB2GRAY)
-            expected = cv.goodFeaturesToTrack(frame, max_corners, quality_lvl,
-                                              min_distance, mask=mask,
-                                              blockSize=block_sz, useHarrisDetector=use_harris_detector, k=k)
-            for e, a in zip(expected, actual):
-                # NB: OpenCV & G-API have different output shapes:
-                # OpenCV - (num_points, 1, 2)
-                # G-API  - (num_points, 2)
-                self.assertEqual(0.0, cv.norm(e.flatten(),
-                                              np.array(a, np.float32).flatten(),
-                                              cv.NORM_INF))
+            expected = cv.medianBlur(in_mat, 3)
+
+            # G-API
+            g_in = cv.GMat()
+            g_out = cv.gapi.medianBlur(g_in, 3)
+            c = cv.GComputation(g_in, g_out)
+            ccomp = c.compileStreaming(cv.gapi.descr_of(in_mat))
+            ccomp.setSource(cv.gin(in_mat))
+            ccomp.start()
+
+            _, actual = ccomp.pull()
+
+            # Assert
+            self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF))
+
+
+        def test_video_input(self):
+            ksize = 3
+            path = self.find_file('cv/video/768x576.avi', [os.environ['OPENCV_TEST_DATA_PATH']])
+
+            # OpenCV
+            cap = cv.VideoCapture(path)
+
+            # G-API
+            g_in = cv.GMat()
+            g_out = cv.gapi.medianBlur(g_in, ksize)
+            c = cv.GComputation(g_in, g_out)
+
+            ccomp = c.compileStreaming()
+            source = cv.gapi.wip.make_capture_src(path)
+            ccomp.setSource(cv.gin(source))
+            ccomp.start()
+
+            # Assert
+            max_num_frames  = 10
+            proc_num_frames = 0
+            while cap.isOpened():
+                has_expected, expected = cap.read()
+                has_actual,   actual   = ccomp.pull()
+
+                self.assertEqual(has_expected, has_actual)
+
+                if not has_actual:
+                    break
+
+                self.assertEqual(0.0, cv.norm(cv.medianBlur(expected, ksize), actual, cv.NORM_INF))
+
+                proc_num_frames += 1
+                if proc_num_frames == max_num_frames:
+                    break
+
+
+        def test_video_split3(self):
+            path = self.find_file('cv/video/768x576.avi', [os.environ['OPENCV_TEST_DATA_PATH']])
+
+            # OpenCV
+            cap = cv.VideoCapture(path)
+
+            # G-API
+            g_in = cv.GMat()
+            b, g, r = cv.gapi.split3(g_in)
+            c = cv.GComputation(cv.GIn(g_in), cv.GOut(b, g, r))
+
+            ccomp = c.compileStreaming()
+            source = cv.gapi.wip.make_capture_src(path)
+            ccomp.setSource(cv.gin(source))
+            ccomp.start()
+
+            # Assert
+            max_num_frames  = 10
+            proc_num_frames = 0
+            while cap.isOpened():
+                has_expected, frame = cap.read()
+                has_actual,   actual   = ccomp.pull()
+
+                self.assertEqual(has_expected, has_actual)
+
+                if not has_actual:
+                    break
+
+                expected = cv.split(frame)
+                for e, a in zip(expected, actual):
+                    self.assertEqual(0.0, cv.norm(e, a, cv.NORM_INF))
+
+                proc_num_frames += 1
+                if proc_num_frames == max_num_frames:
+                    break
+
+
+        def test_video_add(self):
+            sz = (576, 768, 3)
+            in_mat = np.random.randint(0, 100, sz).astype(np.uint8)
+
+            path = self.find_file('cv/video/768x576.avi', [os.environ['OPENCV_TEST_DATA_PATH']])
+
+            # OpenCV
+            cap = cv.VideoCapture(path)
+
+            # G-API
+            g_in1 = cv.GMat()
+            g_in2 = cv.GMat()
+            out = cv.gapi.add(g_in1, g_in2)
+            c = cv.GComputation(cv.GIn(g_in1, g_in2), cv.GOut(out))
+
+            ccomp = c.compileStreaming()
+            source = cv.gapi.wip.make_capture_src(path)
+            ccomp.setSource(cv.gin(source, in_mat))
+            ccomp.start()
+
+            # Assert
+            max_num_frames  = 10
+            proc_num_frames = 0
+            while cap.isOpened():
+                has_expected, frame  = cap.read()
+                has_actual,   actual = ccomp.pull()
+
+                self.assertEqual(has_expected, has_actual)
+
+                if not has_actual:
+                    break
+
+                expected = cv.add(frame, in_mat)
+                self.assertEqual(0.0, cv.norm(expected, actual, cv.NORM_INF))
+
+                proc_num_frames += 1
+                if proc_num_frames == max_num_frames:
+                    break
+
+
+        def test_video_good_features_to_track(self):
+            path = self.find_file('cv/video/768x576.avi', [os.environ['OPENCV_TEST_DATA_PATH']])
+
+            # NB: goodFeaturesToTrack configuration
+            max_corners         = 50
+            quality_lvl         = 0.01
+            min_distance        = 10
+            block_sz            = 3
+            use_harris_detector = True
+            k                   = 0.04
+            mask                = None
+
+            # OpenCV
+            cap = cv.VideoCapture(path)
+
+            # G-API
+            g_in = cv.GMat()
+            g_gray = cv.gapi.RGB2Gray(g_in)
+            g_out = cv.gapi.goodFeaturesToTrack(g_gray, max_corners, quality_lvl,
+                                                min_distance, mask, block_sz, use_harris_detector, k)
+
+            c = cv.GComputation(cv.GIn(g_in), cv.GOut(g_out))
+
+            ccomp = c.compileStreaming()
+            source = cv.gapi.wip.make_capture_src(path)
+            ccomp.setSource(cv.gin(source))
+            ccomp.start()
+
+            # Assert
+            max_num_frames  = 10
+            proc_num_frames = 0
+            while cap.isOpened():
+                has_expected, frame  = cap.read()
+                has_actual,   actual = ccomp.pull()
+
+                self.assertEqual(has_expected, has_actual)
+
+                if not has_actual:
+                    break
+
+                # OpenCV
+                frame = cv.cvtColor(frame, cv.COLOR_RGB2GRAY)
+                expected = cv.goodFeaturesToTrack(frame, max_corners, quality_lvl,
+                                                  min_distance, mask=mask,
+                                                  blockSize=block_sz, useHarrisDetector=use_harris_detector, k=k)
+                for e, a in zip(expected, actual):
+                    # NB: OpenCV & G-API have different output shapes:
+                    # OpenCV - (num_points, 1, 2)
+                    # G-API  - (num_points, 2)
+                    self.assertEqual(0.0, cv.norm(e.flatten(),
+                                                  np.array(a, np.float32).flatten(),
+                                                  cv.NORM_INF))
+
+                proc_num_frames += 1
+                if proc_num_frames == max_num_frames:
+                    break
+
+
+        def test_gapi_streaming_meta(self):
+            ksize = 3
+            path = self.find_file('cv/video/768x576.avi', [os.environ['OPENCV_TEST_DATA_PATH']])
+
+            # G-API
+            g_in = cv.GMat()
+            g_ts = cv.gapi.streaming.timestamp(g_in)
+            g_seqno = cv.gapi.streaming.seqNo(g_in)
+            g_seqid = cv.gapi.streaming.seq_id(g_in)
+
+            c = cv.GComputation(cv.GIn(g_in), cv.GOut(g_ts, g_seqno, g_seqid))
+
+            ccomp = c.compileStreaming()
+            source = cv.gapi.wip.make_capture_src(path)
+            ccomp.setSource(cv.gin(source))
+            ccomp.start()
+
+            # Assert
+            max_num_frames  = 10
+            curr_frame_number = 0
+            while True:
+                has_frame, (ts, seqno, seqid) = ccomp.pull()
+
+                if not has_frame:
+                    break
+
+                self.assertEqual(curr_frame_number, seqno)
+                self.assertEqual(curr_frame_number, seqid)
+
+                curr_frame_number += 1
+                if curr_frame_number == max_num_frames:
+                    break
+
+
+        def test_desync(self):
+            path = self.find_file('cv/video/768x576.avi', [os.environ['OPENCV_TEST_DATA_PATH']])
+
+            # G-API
+            g_in = cv.GMat()
+            g_out1 = cv.gapi.copy(g_in)
+            des = cv.gapi.streaming.desync(g_in)
+            g_out2 = GDelay.on(des)
+
+            c = cv.GComputation(cv.GIn(g_in), cv.GOut(g_out1, g_out2))
+
+            kernels = cv.gapi.kernels(GDelayImpl)
+            ccomp = c.compileStreaming(args=cv.gapi.compile_args(kernels))
+            source = cv.gapi.wip.make_capture_src(path)
+            ccomp.setSource(cv.gin(source))
+            ccomp.start()
+
+            # Assert
+            max_num_frames  = 10
+            proc_num_frames = 0
+
+            out_counter = 0
+            desync_out_counter = 0
+            none_counter = 0
+            while True:
+                has_frame, (out1, out2) = ccomp.pull()
+                if not has_frame:
+                    break
+
+                if not out1 is None:
+                    out_counter += 1
+                if not out2 is None:
+                    desync_out_counter += 1
+                else:
+                    none_counter += 1
+
+                proc_num_frames += 1
+                if proc_num_frames == max_num_frames:
+                    ccomp.stop()
+                    break
+
+            self.assertLess(0, proc_num_frames)
+            self.assertLess(desync_out_counter, out_counter)
+            self.assertLess(0, none_counter)
+
+
+        def test_compile_streaming_empty(self):
+            g_in = cv.GMat()
+            comp = cv.GComputation(g_in, cv.gapi.medianBlur(g_in, 3))
+            comp.compileStreaming()
+
+
+        def test_compile_streaming_args(self):
+            g_in = cv.GMat()
+            comp = cv.GComputation(g_in, cv.gapi.medianBlur(g_in, 3))
+            comp.compileStreaming(cv.gapi.compile_args(cv.gapi.streaming.queue_capacity(1)))
+
+
+        def test_compile_streaming_descr_of(self):
+            g_in = cv.GMat()
+            comp = cv.GComputation(g_in, cv.gapi.medianBlur(g_in, 3))
+            img = np.zeros((3,300,300), dtype=np.float32)
+            comp.compileStreaming(cv.gapi.descr_of(img))
+
+
+        def test_compile_streaming_descr_of_and_args(self):
+            g_in = cv.GMat()
+            comp = cv.GComputation(g_in, cv.gapi.medianBlur(g_in, 3))
+            img = np.zeros((3,300,300), dtype=np.float32)
+            comp.compileStreaming(cv.gapi.descr_of(img),
+                    cv.gapi.compile_args(cv.gapi.streaming.queue_capacity(1)))
+
+
+        def test_compile_streaming_meta(self):
+            g_in = cv.GMat()
+            comp = cv.GComputation(g_in, cv.gapi.medianBlur(g_in, 3))
+            img = np.zeros((3,300,300), dtype=np.float32)
+            comp.compileStreaming([cv.GMatDesc(cv.CV_8U, 3, (300, 300))])
+
+
+        def test_compile_streaming_meta_and_args(self):
+            g_in = cv.GMat()
+            comp = cv.GComputation(g_in, cv.gapi.medianBlur(g_in, 3))
+            img = np.zeros((3,300,300), dtype=np.float32)
+            comp.compileStreaming([cv.GMatDesc(cv.CV_8U, 3, (300, 300))],
+                    cv.gapi.compile_args(cv.gapi.streaming.queue_capacity(1)))
+
+
+
+except unittest.SkipTest as e:
+
+    message = str(e)
+
+    class TestSkip(unittest.TestCase):
+        def setUp(self):
+            self.skipTest('Skip tests: ' + message)
+
+        def test_skip():
+            pass
+
+    pass
 
-            proc_num_frames += 1
-            if proc_num_frames == max_num_frames:
-                break;
 
 if __name__ == '__main__':
     NewOpenCVTests.bootstrap()

modules/gapi/misc/python/test/test_gapi_types.py

@@ -3,29 +3,51 @@
 import numpy as np
 import cv2 as cv
 import os
+import sys
+import unittest
 
 from tests_common import NewOpenCVTests
 
-class gapi_types_test(NewOpenCVTests):
 
-    def test_garray_type(self):
-        types = [cv.gapi.CV_BOOL  , cv.gapi.CV_INT   , cv.gapi.CV_DOUBLE , cv.gapi.CV_FLOAT,
-                 cv.gapi.CV_STRING, cv.gapi.CV_POINT , cv.gapi.CV_POINT2F, cv.gapi.CV_SIZE ,
-                 cv.gapi.CV_RECT  , cv.gapi.CV_SCALAR, cv.gapi.CV_MAT    , cv.gapi.CV_GMAT]
+try:
 
-        for t in types:
-            g_array = cv.GArrayT(t)
-            self.assertEqual(t, g_array.type())
+    if sys.version_info[:2] < (3, 0):
+        raise unittest.SkipTest('Python 2.x is not supported')
+
+    class gapi_types_test(NewOpenCVTests):
+
+        def test_garray_type(self):
+            types = [cv.gapi.CV_BOOL  , cv.gapi.CV_INT   , cv.gapi.CV_DOUBLE , cv.gapi.CV_FLOAT,
+                     cv.gapi.CV_STRING, cv.gapi.CV_POINT , cv.gapi.CV_POINT2F, cv.gapi.CV_SIZE ,
+                     cv.gapi.CV_RECT  , cv.gapi.CV_SCALAR, cv.gapi.CV_MAT    , cv.gapi.CV_GMAT]
+
+            for t in types:
+                g_array = cv.GArrayT(t)
+                self.assertEqual(t, g_array.type())
 
 
-    def test_gopaque_type(self):
-        types = [cv.gapi.CV_BOOL  , cv.gapi.CV_INT   , cv.gapi.CV_DOUBLE , cv.gapi.CV_FLOAT,
-                 cv.gapi.CV_STRING, cv.gapi.CV_POINT , cv.gapi.CV_POINT2F, cv.gapi.CV_SIZE ,
-                 cv.gapi.CV_RECT]
+        def test_gopaque_type(self):
+            types = [cv.gapi.CV_BOOL  , cv.gapi.CV_INT   , cv.gapi.CV_DOUBLE , cv.gapi.CV_FLOAT,
+                     cv.gapi.CV_STRING, cv.gapi.CV_POINT , cv.gapi.CV_POINT2F, cv.gapi.CV_SIZE ,
+                     cv.gapi.CV_RECT]
 
-        for t in types:
-            g_opaque = cv.GOpaqueT(t)
-            self.assertEqual(t, g_opaque.type())
+            for t in types:
+                g_opaque = cv.GOpaqueT(t)
+                self.assertEqual(t, g_opaque.type())
+
+
+except unittest.SkipTest as e:
+
+    message = str(e)
+
+    class TestSkip(unittest.TestCase):
+        def setUp(self):
+            self.skipTest('Skip tests: ' + message)
+
+        def test_skip():
+            pass
+
+    pass
 
 
 if __name__ == '__main__':

modules/gapi/src/api/ginfer.cpp

@@ -15,6 +15,10 @@ cv::gapi::GNetPackage::GNetPackage(std::initializer_list<GNetParam> ii)
     : networks(ii) {
 }
 
+cv::gapi::GNetPackage::GNetPackage(std::vector<GNetParam> nets)
+    : networks(nets) {
+}
+
 std::vector<cv::gapi::GBackend> cv::gapi::GNetPackage::backends() const {
     std::unordered_set<cv::gapi::GBackend> unique_set;
     for (const auto &nn : networks) unique_set.insert(nn.backend);

modules/gapi/src/api/kernels_streaming.cpp

@@ -2,7 +2,7 @@
 // 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) 2020 Intel Corporation
+// Copyright (C) 2020-2021 Intel Corporation
 
 #include "precomp.hpp"
 
@@ -75,6 +75,11 @@ cv::GMat cv::gapi::streaming::desync(const cv::GMat &g) {
     // object will feed both branches of the streaming executable.
 }
 
+// All notes from the above desync(GMat) are also applicable here
+cv::GFrame cv::gapi::streaming::desync(const cv::GFrame &f) {
+    return cv::gapi::copy(detail::desync(f));
+}
+
 cv::GMat cv::gapi::streaming::BGR(const cv::GFrame& in) {
     return cv::gapi::streaming::GBGR::on(in);
 }

modules/gapi/src/api/render_ocv.cpp

@@ -159,7 +159,7 @@ void drawPrimitivesOCV(cv::Mat& in,
             {
                 const auto& rp = cv::util::get<Rect>(p);
                 const auto color = converter.cvtColor(rp.color);
-                cv::rectangle(in, rp.rect, color , rp.thick);
+                cv::rectangle(in, rp.rect, color, rp.thick, rp.lt, rp.shift);
                 break;
             }
 
@@ -198,7 +198,7 @@ void drawPrimitivesOCV(cv::Mat& in,
             {
                 const auto& cp = cv::util::get<Circle>(p);
                 const auto color = converter.cvtColor(cp.color);
-                cv::circle(in, cp.center, cp.radius, color, cp.thick);
+                cv::circle(in, cp.center, cp.radius, color, cp.thick, cp.lt, cp.shift);
                 break;
             }
 
@@ -206,7 +206,7 @@ void drawPrimitivesOCV(cv::Mat& in,
             {
                 const auto& lp = cv::util::get<Line>(p);
                 const auto color = converter.cvtColor(lp.color);
-                cv::line(in, lp.pt1, lp.pt2, color, lp.thick);
+                cv::line(in, lp.pt1, lp.pt2, color, lp.thick, lp.lt, lp.shift);
                 break;
             }
 

modules/gapi/src/backends/common/gmetabackend.cpp

@@ -85,6 +85,19 @@ class GGraphMetaBackendImpl final: public cv::gapi::GBackend::Priv {
                          const std::vector<cv::gimpl::Data>&) const override {
         return EPtr{new GraphMetaExecutable(graph, nodes)};
     }
+
+    virtual bool controlsMerge() const override
+    {
+        return true;
+    }
+
+    virtual bool allowsMerge(const cv::gimpl::GIslandModel::Graph &,
+                             const ade::NodeHandle &,
+                             const ade::NodeHandle &,
+                             const ade::NodeHandle &) const override
+    {
+        return false;
+    }
 };
 
 cv::gapi::GBackend graph_meta_backend() {

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

@@ -652,7 +652,12 @@ GAPI_OCV_KERNEL(GCPUParseSSDBL, cv::gapi::nn::parsers::GParseSSDBL)
                     std::vector<cv::Rect>& out_boxes,
                     std::vector<int>&      out_labels)
     {
-        cv::parseSSDBL(in_ssd_result, in_size, confidence_threshold, filter_label, out_boxes, out_labels);
+        cv::ParseSSD(in_ssd_result, in_size,
+                     confidence_threshold,
+                     filter_label,
+                     false,
+                     false,
+                     out_boxes, out_labels);
     }
 };
 
@@ -665,7 +670,13 @@ GAPI_OCV_KERNEL(GOCVParseSSD, cv::gapi::nn::parsers::GParseSSD)
                     const bool      filter_out_of_bounds,
                     std::vector<cv::Rect>& out_boxes)
     {
-        cv::parseSSD(in_ssd_result, in_size, confidence_threshold, alignment_to_square, filter_out_of_bounds, out_boxes);
+        std::vector<int> unused_labels;
+        cv::ParseSSD(in_ssd_result, in_size,
+                     confidence_threshold,
+                     -1,
+                     alignment_to_square,
+                     filter_out_of_bounds,
+                     out_boxes, unused_labels);
     }
 };
 

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

@@ -170,12 +170,14 @@ private:
 } // namespace nn
 } // namespace gapi
 
-void parseSSDBL(const cv::Mat&  in_ssd_result,
-                const cv::Size& in_size,
-                const float     confidence_threshold,
-                const int       filter_label,
-                std::vector<cv::Rect>& out_boxes,
-                std::vector<int>&      out_labels)
+void ParseSSD(const cv::Mat&  in_ssd_result,
+              const cv::Size& in_size,
+              const float     confidence_threshold,
+              const int       filter_label,
+              const bool      alignment_to_square,
+              const bool      filter_out_of_bounds,
+              std::vector<cv::Rect>& out_boxes,
+              std::vector<int>&      out_labels)
 {
     cv::gapi::nn::SSDParser parser(in_ssd_result.size, in_size, in_ssd_result.ptr<float>());
     out_boxes.clear();
@@ -188,38 +190,6 @@ void parseSSDBL(const cv::Mat&  in_ssd_result,
     {
         std::tie(rc, image_id, confidence, label) = parser.extract(i);
 
-        if (image_id < 0.f)
-        {
-            break;    // marks end-of-detections
-        }
-
-        if (confidence < confidence_threshold ||
-            (filter_label != -1 && label != filter_label))
-        {
-            continue; // filter out object classes if filter is specified
-        }             // and skip objects with low confidence
-        out_boxes.emplace_back(rc & parser.getSurface());
-        out_labels.emplace_back(label);
-    }
-}
-
-void parseSSD(const cv::Mat&  in_ssd_result,
-              const cv::Size& in_size,
-              const float     confidence_threshold,
-              const bool      alignment_to_square,
-              const bool      filter_out_of_bounds,
-              std::vector<cv::Rect>& out_boxes)
-{
-    cv::gapi::nn::SSDParser parser(in_ssd_result.size, in_size, in_ssd_result.ptr<float>());
-    out_boxes.clear();
-    cv::Rect rc;
-    float image_id, confidence;
-    int label;
-    const size_t range = parser.getMaxProposals();
-    for (size_t i = 0; i < range; ++i)
-    {
-        std::tie(rc, image_id, confidence, label) = parser.extract(i);
-
         if (image_id < 0.f)
         {
             break;    // marks end-of-detections
@@ -228,12 +198,14 @@ void parseSSD(const cv::Mat&  in_ssd_result,
         {
             continue; // skip objects with low confidence
         }
-
+        if((filter_label != -1) && (label != filter_label))
+        {
+            continue; // filter out object classes if filter is specified
+        }
         if (alignment_to_square)
         {
             parser.adjustBoundingBox(rc);
         }
-
         const auto clipped_rc = rc & parser.getSurface();
         if (filter_out_of_bounds)
         {
@@ -243,6 +215,7 @@ void parseSSD(const cv::Mat&  in_ssd_result,
             }
         }
         out_boxes.emplace_back(clipped_rc);
+        out_labels.emplace_back(label);
     }
 }
 

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

@@ -11,19 +11,14 @@
 
 namespace cv
 {
-void parseSSDBL(const cv::Mat&  in_ssd_result,
-                const cv::Size& in_size,
-                const float     confidence_threshold,
-                const int       filter_label,
-                std::vector<cv::Rect>& out_boxes,
-                std::vector<int>&      out_labels);
-
-void parseSSD(const cv::Mat&  in_ssd_result,
+void ParseSSD(const cv::Mat&  in_ssd_result,
               const cv::Size& in_size,
               const float     confidence_threshold,
+              const int       filter_label,
               const bool      alignment_to_square,
               const bool      filter_out_of_bounds,
-              std::vector<cv::Rect>& out_boxes);
+              std::vector<cv::Rect>& out_boxes,
+              std::vector<int>&      out_labels);
 
 void parseYolo(const cv::Mat&  in_yolo_result,
                const cv::Size& in_size,

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

@@ -37,3 +37,15 @@ cv::gapi::ie::PyParams cv::gapi::ie::params(const std::string &tag,
                                             const std::string &device) {
     return {tag, model, device};
 }
+
+cv::gapi::ie::PyParams& cv::gapi::ie::PyParams::constInput(const std::string &layer_name,
+                                                           const cv::Mat &data,
+                                                           TraitAs hint) {
+    m_priv->constInput(layer_name, data, hint);
+    return *this;
+}
+
+cv::gapi::ie::PyParams& cv::gapi::ie::PyParams::cfgNumRequests(size_t nireq) {
+    m_priv->cfgNumRequests(nireq);
+    return *this;
+}

modules/gapi/src/compiler/gstreaming.cpp

@@ -75,6 +75,11 @@ bool cv::GStreamingCompiled::Priv::pull(cv::GOptRunArgsP &&outs)
     return m_exec->pull(std::move(outs));
 }
 
+std::tuple<bool, cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>> cv::GStreamingCompiled::Priv::pull()
+{
+    return m_exec->pull();
+}
+
 bool cv::GStreamingCompiled::Priv::try_pull(cv::GRunArgsP &&outs)
 {
     return m_exec->try_pull(std::move(outs));
@@ -123,18 +128,9 @@ bool cv::GStreamingCompiled::pull(cv::GRunArgsP &&outs)
     return m_priv->pull(std::move(outs));
 }
 
-std::tuple<bool, cv::GRunArgs> cv::GStreamingCompiled::pull()
+std::tuple<bool, cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>> cv::GStreamingCompiled::pull()
 {
-    GRunArgs run_args;
-    GRunArgsP outs;
-    const auto& out_info = m_priv->outInfo();
-    run_args.reserve(out_info.size());
-    outs.reserve(out_info.size());
-
-    cv::detail::constructGraphOutputs(m_priv->outInfo(), run_args, outs);
-
-    bool is_over = m_priv->pull(std::move(outs));
-    return std::make_tuple(is_over, run_args);
+    return m_priv->pull();
 }
 
 bool cv::GStreamingCompiled::pull(cv::GOptRunArgsP &&outs)

modules/gapi/src/compiler/gstreaming_priv.hpp

@@ -46,6 +46,7 @@ public:
     void start();
     bool pull(cv::GRunArgsP &&outs);
     bool pull(cv::GOptRunArgsP &&outs);
+    std::tuple<bool, cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>> pull();
     bool try_pull(cv::GRunArgsP &&outs);
     void stop();
 

modules/gapi/src/executor/gexecutor.cpp

@@ -7,8 +7,6 @@
 
 #include "precomp.hpp"
 
-#include <iostream>
-
 #include <ade/util/zip_range.hpp>
 
 #include <opencv2/gapi/opencv_includes.hpp>
@@ -157,10 +155,14 @@ void writeBackExec(const Mag& mag, const RcDesc &rc, GRunArgP &g_arg)
         // FIXME:
         // Rework, find a better way to check if there should be
         // a real copy (add a pass to StreamingBackend?)
+        // NB: In case RMat adapter not equal to "RMatAdapter" need to
+        // copy data back to the host as well.
+        // FIXME: Rename "RMatAdapter" to "OpenCVAdapter".
         auto& out_mat = *util::get<cv::Mat*>(g_arg);
         const auto& rmat = mag.template slot<cv::RMat>().at(rc.id);
-        auto mag_data = rmat.get<RMatAdapter>()->data();
-        if (out_mat.data != mag_data) {
+        auto* adapter = rmat.get<RMatAdapter>();
+        if ((adapter != nullptr && out_mat.data != adapter->data()) ||
+            (adapter == nullptr)) {
             auto view = rmat.access(RMat::Access::R);
             asMat(view).copyTo(out_mat);
         }
@@ -407,7 +409,8 @@ bool cv::gimpl::GExecutor::canReshape() const
 {
     // FIXME: Introduce proper reshaping support on GExecutor level
     // for all cases!
-    return (m_ops.size() == 1) && m_ops[0].isl_exec->canReshape();
+    return std::all_of(m_ops.begin(), m_ops.end(),
+                       [](const OpDesc& op) { return op.isl_exec->canReshape(); });
 }
 
 void cv::gimpl::GExecutor::reshape(const GMetaArgs& inMetas, const GCompileArgs& args)
@@ -417,7 +420,17 @@ void cv::gimpl::GExecutor::reshape(const GMetaArgs& inMetas, const GCompileArgs&
     ade::passes::PassContext ctx{g};
     passes::initMeta(ctx, inMetas);
     passes::inferMeta(ctx, true);
-    m_ops[0].isl_exec->reshape(g, args);
+
+    // NB: Before reshape islands need to re-init resources for every slot.
+    for (auto slot : m_slots)
+    {
+        initResource(slot.slot_nh, slot.data_nh);
+    }
+
+    for (auto& op : m_ops)
+    {
+        op.isl_exec->reshape(g, args);
+    }
 }
 
 void cv::gimpl::GExecutor::prepareForNewStream()

modules/gapi/src/executor/gstreamingexecutor.cpp

@@ -186,8 +186,9 @@ void sync_data(cv::gimpl::stream::Result &r, cv::GOptRunArgsP &outputs)
         // FIXME: this conversion should be unified
         switch (out_obj.index())
         {
-            HANDLE_CASE(cv::Scalar); break;
-            HANDLE_CASE(cv::RMat);   break;
+            HANDLE_CASE(cv::Scalar);     break;
+            HANDLE_CASE(cv::RMat);       break;
+            HANDLE_CASE(cv::MediaFrame); break;
 
         case T::index_of<O<cv::Mat>*>(): {
             // Mat: special handling.
@@ -1017,6 +1018,49 @@ void check_DesyncObjectConsumedByMultipleIslands(const cv::gimpl::GIslandModel::
     } // for(nodes)
 }
 
+// NB: Construct GRunArgsP based on passed info and store the memory in passed cv::GRunArgs.
+// Needed for python bridge, because in case python user doesn't pass output arguments to apply.
+void constructOptGraphOutputs(const cv::GTypesInfo &out_info,
+                                    cv::GOptRunArgs &args,
+                                    cv::GOptRunArgsP &outs)
+{
+    for (auto&& info : out_info)
+    {
+        switch (info.shape)
+        {
+            case cv::GShape::GMAT:
+            {
+                args.emplace_back(cv::optional<cv::Mat>{});
+                outs.emplace_back(&cv::util::get<cv::optional<cv::Mat>>(args.back()));
+                break;
+            }
+            case cv::GShape::GSCALAR:
+            {
+                args.emplace_back(cv::optional<cv::Scalar>{});
+                outs.emplace_back(&cv::util::get<cv::optional<cv::Scalar>>(args.back()));
+                break;
+            }
+            case cv::GShape::GARRAY:
+            {
+                cv::detail::VectorRef ref;
+                cv::util::get<cv::detail::ConstructVec>(info.ctor)(ref);
+                args.emplace_back(cv::util::make_optional(std::move(ref)));
+                outs.emplace_back(wrap_opt_arg(cv::util::get<cv::optional<cv::detail::VectorRef>>(args.back())));
+                break;
+            }
+            case cv::GShape::GOPAQUE:
+            {
+                cv::detail::OpaqueRef ref;
+                cv::util::get<cv::detail::ConstructOpaque>(info.ctor)(ref);
+                args.emplace_back(cv::util::make_optional(std::move(ref)));
+                outs.emplace_back(wrap_opt_arg(cv::util::get<cv::optional<cv::detail::OpaqueRef>>(args.back())));
+                break;
+            }
+            default:
+                cv::util::throw_error(std::logic_error("Unsupported optional output shape for Python"));
+        }
+    }
+}
 } // anonymous namespace
 
 class cv::gimpl::GStreamingExecutor::Synchronizer final {
@@ -1320,6 +1364,16 @@ cv::gimpl::GStreamingExecutor::GStreamingExecutor(std::unique_ptr<ade::Graph> &&
     // per the same input frame, so the output traffic multiplies)
     GAPI_Assert(m_collector_map.size() > 0u);
     m_out_queue.set_capacity(queue_capacity * m_collector_map.size());
+
+    // FIXME: The code duplicates logic of collectGraphInfo()
+    cv::gimpl::GModel::ConstGraph cgr(*m_orig_graph);
+    auto meta = cgr.metadata().get<cv::gimpl::Protocol>().out_nhs;
+    out_info.reserve(meta.size());
+
+    ade::util::transform(meta, std::back_inserter(out_info), [&cgr](const ade::NodeHandle& nh) {
+        const auto& data = cgr.metadata(nh).get<cv::gimpl::Data>();
+        return cv::GTypeInfo{data.shape, data.kind, data.ctor};
+    });
 }
 
 cv::gimpl::GStreamingExecutor::~GStreamingExecutor()
@@ -1653,6 +1707,31 @@ bool cv::gimpl::GStreamingExecutor::pull(cv::GOptRunArgsP &&outs)
     return true;
 }
 
+std::tuple<bool, cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>> cv::gimpl::GStreamingExecutor::pull()
+{
+    using RunArgs = cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>;
+    bool is_over = false;
+
+    if (m_desync) {
+        GOptRunArgs opt_run_args;
+        GOptRunArgsP opt_outs;
+        opt_outs.reserve(out_info.size());
+        opt_run_args.reserve(out_info.size());
+
+        constructOptGraphOutputs(out_info, opt_run_args, opt_outs);
+        is_over = pull(std::move(opt_outs));
+        return std::make_tuple(is_over, RunArgs(opt_run_args));
+    }
+
+    GRunArgs run_args;
+    GRunArgsP outs;
+    run_args.reserve(out_info.size());
+    outs.reserve(out_info.size());
+
+    constructGraphOutputs(out_info, run_args, outs);
+    is_over = pull(std::move(outs));
+    return std::make_tuple(is_over, RunArgs(run_args));
+}
 
 bool cv::gimpl::GStreamingExecutor::try_pull(cv::GRunArgsP &&outs)
 {

modules/gapi/src/executor/gstreamingexecutor.hpp

@@ -195,6 +195,8 @@ protected:
 
     void wait_shutdown();
 
+    cv::GTypesInfo out_info;
+
 public:
     explicit GStreamingExecutor(std::unique_ptr<ade::Graph> &&g_model,
                                 const cv::GCompileArgs &comp_args);
@@ -203,6 +205,7 @@ public:
     void start();
     bool pull(cv::GRunArgsP &&outs);
     bool pull(cv::GOptRunArgsP &&outs);
+    std::tuple<bool, cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>> pull();
     bool try_pull(cv::GRunArgsP &&outs);
     void stop();
     bool running() const;

modules/gapi/test/internal/gapi_int_executor_tests.cpp

@@ -6,10 +6,158 @@
 
 
 #include "../test_precomp.hpp"
+#include "../gapi_mock_kernels.hpp"
 
 namespace opencv_test
 {
 
+namespace
+{
+
+class GMockExecutable final: public cv::gimpl::GIslandExecutable
+{
+    virtual inline bool canReshape() const override {
+        return m_priv->m_can_reshape;
+    }
+
+    virtual void reshape(ade::Graph&, const GCompileArgs&) override
+    {
+        m_priv->m_reshape_counter++;
+    }
+    virtual void handleNewStream() override {  }
+    virtual void run(std::vector<InObj>&&, std::vector<OutObj>&&) { }
+    virtual bool allocatesOutputs() const override
+    {
+        return true;
+    }
+
+    virtual cv::RMat allocate(const cv::GMatDesc&) const override
+    {
+        m_priv->m_allocate_counter++;
+        return cv::RMat();
+    }
+
+    // NB: GMockBackendImpl creates new unique_ptr<GMockExecutable>
+    // on every compile call. Need to share counters between instances in order
+    // to validate it in tests.
+    struct Priv
+    {
+        bool m_can_reshape;
+        int  m_reshape_counter;
+        int  m_allocate_counter;
+    };
+
+    std::shared_ptr<Priv> m_priv;
+
+public:
+    GMockExecutable(bool can_reshape = true)
+        : m_priv(new Priv{can_reshape, 0, 0})
+    {
+    };
+
+    void setReshape(bool can_reshape) { m_priv->m_can_reshape = can_reshape; }
+
+    int getReshapeCounter()  const { return m_priv->m_reshape_counter;  }
+    int getAllocateCounter() const { return m_priv->m_allocate_counter; }
+};
+
+class GMockBackendImpl final: public cv::gapi::GBackend::Priv
+{
+    virtual void unpackKernel(ade::Graph            &,
+                              const ade::NodeHandle &,
+                              const cv::GKernelImpl &) override { }
+
+    virtual EPtr compile(const ade::Graph &,
+                         const cv::GCompileArgs &,
+                         const std::vector<ade::NodeHandle> &) const override
+    {
+        ++m_compile_counter;
+        return EPtr{new GMockExecutable(m_exec)};
+    }
+
+    mutable int     m_compile_counter = 0;
+    GMockExecutable m_exec;
+
+    virtual bool controlsMerge() const override {
+        return true;
+    }
+
+    virtual bool allowsMerge(const cv::gimpl::GIslandModel::Graph &,
+                             const ade::NodeHandle &,
+                             const ade::NodeHandle &,
+                             const ade::NodeHandle &) const override {
+        return false;
+    }
+
+public:
+    GMockBackendImpl(const GMockExecutable& exec) : m_exec(exec) { };
+    int getCompileCounter() const { return m_compile_counter; }
+};
+
+class GMockFunctor : public gapi::cpu::GOCVFunctor
+{
+public:
+    GMockFunctor(cv::gapi::GBackend backend,
+                 const char* id,
+                 const Meta &meta,
+                 const Impl& impl)
+        : gapi::cpu::GOCVFunctor(id, meta, impl), m_backend(backend)
+    {
+    }
+
+    cv::gapi::GBackend backend() const override { return m_backend; }
+
+private:
+    cv::gapi::GBackend m_backend;
+};
+
+template<typename K, typename Callable>
+GMockFunctor mock_kernel(const cv::gapi::GBackend& backend, Callable c)
+{
+    using P = cv::detail::OCVCallHelper<Callable, typename K::InArgs, typename K::OutArgs>;
+    return GMockFunctor{ backend
+                       , K::id()
+                       , &K::getOutMeta
+                       , std::bind(&P::callFunctor, std::placeholders::_1, c)
+                       };
+}
+
+void dummyFooImpl(const cv::Mat&, cv::Mat&)                 { };
+void dummyBarImpl(const cv::Mat&, const cv::Mat&, cv::Mat&) { };
+
+struct GExecutorReshapeTest: public ::testing::Test
+{
+    GExecutorReshapeTest()
+        : comp([](){
+                cv::GMat in;
+                cv::GMat out = I::Bar::on(I::Foo::on(in), in);
+                return cv::GComputation(in, out);
+          })
+    {
+        backend_impl1 = std::make_shared<GMockBackendImpl>(island1);
+        backend1      = cv::gapi::GBackend{backend_impl1};
+        backend_impl2 = std::make_shared<GMockBackendImpl>(island2);
+        backend2      = cv::gapi::GBackend{backend_impl2};
+        auto kernel1  = mock_kernel<I::Foo>(backend1, dummyFooImpl);
+        auto kernel2  = mock_kernel<I::Bar>(backend2, dummyBarImpl);
+        pkg           = cv::gapi::kernels(kernel1, kernel2);
+        in_mat1       = cv::Mat::eye(32, 32, CV_8UC1);
+        in_mat2       = cv::Mat::eye(64, 64, CV_8UC1);
+    }
+
+    cv::GComputation                  comp;
+    GMockExecutable                   island1;
+    std::shared_ptr<GMockBackendImpl> backend_impl1;
+    cv::gapi::GBackend                backend1;
+    GMockExecutable                   island2;
+    std::shared_ptr<GMockBackendImpl> backend_impl2;
+    cv::gapi::GBackend                backend2;
+    cv::gapi::GKernelPackage          pkg;
+    cv::Mat                           in_mat1, in_mat2, out_mat;;
+};
+
+} // anonymous namespace
+
 // FIXME: avoid code duplication
 // The below graph and config is taken from ComplexIslands test suite
 TEST(GExecutor, SmokeTest)
@@ -77,6 +225,75 @@ TEST(GExecutor, SmokeTest)
     // with breakdown worked)
 }
 
+TEST_F(GExecutorReshapeTest, ReshapeInsteadOfRecompile)
+{
+    // NB: Initial state
+    EXPECT_EQ(0, backend_impl1->getCompileCounter());
+    EXPECT_EQ(0, backend_impl2->getCompileCounter());
+    EXPECT_EQ(0, island1.getReshapeCounter());
+    EXPECT_EQ(0, island2.getReshapeCounter());
+
+    // NB: First compilation.
+    comp.apply(cv::gin(in_mat1), cv::gout(out_mat), cv::compile_args(pkg));
+    EXPECT_EQ(1, backend_impl1->getCompileCounter());
+    EXPECT_EQ(1, backend_impl2->getCompileCounter());
+    EXPECT_EQ(0, island1.getReshapeCounter());
+    EXPECT_EQ(0, island2.getReshapeCounter());
+
+    // NB: GMockBackendImpl implements "reshape" method,
+    // so it won't be recompiled if the meta is changed.
+    comp.apply(cv::gin(in_mat2), cv::gout(out_mat), cv::compile_args(pkg));
+    EXPECT_EQ(1, backend_impl1->getCompileCounter());
+    EXPECT_EQ(1, backend_impl2->getCompileCounter());
+    EXPECT_EQ(1, island1.getReshapeCounter());
+    EXPECT_EQ(1, island2.getReshapeCounter());
+}
+
+TEST_F(GExecutorReshapeTest, OneBackendNotReshapable)
+{
+    // NB: Make first island not reshapable
+    island1.setReshape(false);
+
+    // NB: Initial state
+    EXPECT_EQ(0, backend_impl1->getCompileCounter());
+    EXPECT_EQ(0, island1.getReshapeCounter());
+    EXPECT_EQ(0, backend_impl2->getCompileCounter());
+    EXPECT_EQ(0, island2.getReshapeCounter());
+
+    // NB: First compilation.
+    comp.apply(cv::gin(in_mat1), cv::gout(out_mat), cv::compile_args(pkg));
+    EXPECT_EQ(1, backend_impl1->getCompileCounter());
+    EXPECT_EQ(1, backend_impl2->getCompileCounter());
+    EXPECT_EQ(0, island1.getReshapeCounter());
+    EXPECT_EQ(0, island2.getReshapeCounter());
+
+    // NB: Since one of islands isn't reshapable
+    // the entire graph isn't reshapable as well.
+    comp.apply(cv::gin(in_mat2), cv::gout(out_mat), cv::compile_args(pkg));
+    EXPECT_EQ(2, backend_impl1->getCompileCounter());
+    EXPECT_EQ(2, backend_impl2->getCompileCounter());
+    EXPECT_EQ(0, island1.getReshapeCounter());
+    EXPECT_EQ(0, island2.getReshapeCounter());
+}
+
+TEST_F(GExecutorReshapeTest, ReshapeCallAllocate)
+{
+    // NB: Initial state
+    EXPECT_EQ(0, island1.getAllocateCounter());
+    EXPECT_EQ(0, island1.getReshapeCounter());
+
+    // NB: First compilation.
+    comp.apply(cv::gin(in_mat1), cv::gout(out_mat), cv::compile_args(pkg));
+    EXPECT_EQ(1, island1.getAllocateCounter());
+    EXPECT_EQ(0, island1.getReshapeCounter());
+
+    // NB: The entire graph is reshapable, so it won't be recompiled, but reshaped.
+    // Check that reshape call "allocate" to reallocate buffers.
+    comp.apply(cv::gin(in_mat2), cv::gout(out_mat), cv::compile_args(pkg));
+    EXPECT_EQ(2, island1.getAllocateCounter());
+    EXPECT_EQ(1, island1.getReshapeCounter());
+}
+
 // FIXME: Add explicit tests on GMat/GScalar/GArray<T> being connectors
 // between executed islands
 

modules/gapi/test/render/gapi_render_tests_ocv.cpp

@@ -639,8 +639,8 @@ INSTANTIATE_TEST_CASE_P(RenderBGROCVTestRectsImpl, RenderBGROCVTestRects,
                                 Values(cv::Rect(100, 100, 200, 200)),
                                 Values(cv::Scalar(100, 50, 150)),
                                 Values(2),
-                                Values(LINE_8),
-                                Values(0)));
+                                Values(LINE_8, LINE_4),
+                                Values(0, 1)));
 
 INSTANTIATE_TEST_CASE_P(RenderNV12OCVTestRectsImpl, RenderNV12OCVTestRects,
                         Combine(Values(cv::Size(1280, 720)),
@@ -673,8 +673,8 @@ INSTANTIATE_TEST_CASE_P(RenderNV12OCVTestCirclesImpl, RenderNV12OCVTestCircles,
                                 Values(10),
                                 Values(cv::Scalar(100, 50, 150)),
                                 Values(2),
-                                Values(LINE_8),
-                                Values(0)));
+                                Values(LINE_8, LINE_4),
+                                Values(0, 1)));
 
 INSTANTIATE_TEST_CASE_P(RenderMFrameOCVTestCirclesImpl, RenderMFrameOCVTestCircles,
                         Combine(Values(cv::Size(1280, 720)),

modules/gapi/test/streaming/gapi_streaming_tests.cpp

@@ -2,7 +2,7 @@
 // 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) 2019-2020 Intel Corporation
+// Copyright (C) 2019-2021 Intel Corporation
 
 
 #include "../test_precomp.hpp"
@@ -244,6 +244,35 @@ public:
     }
 };
 
+void checkPullOverload(const cv::Mat& ref,
+                       const bool has_output,
+                       cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>& args) {
+    EXPECT_TRUE(has_output);
+    using runArgs = cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>;
+    cv::Mat out_mat;
+    switch (args.index()) {
+        case runArgs::index_of<cv::GRunArgs>():
+        {
+            auto outputs = util::get<cv::GRunArgs>(args);
+            EXPECT_EQ(1u, outputs.size());
+            out_mat = cv::util::get<cv::Mat>(outputs[0]);
+            break;
+        }
+        case runArgs::index_of<cv::GOptRunArgs>():
+        {
+            auto outputs = util::get<cv::GOptRunArgs>(args);
+            EXPECT_EQ(1u, outputs.size());
+            auto opt_mat = cv::util::get<cv::optional<cv::Mat>>(outputs[0]);
+            ASSERT_TRUE(opt_mat.has_value());
+            out_mat = *opt_mat;
+            break;
+        }
+        default: GAPI_Assert(false && "Incorrect type of Args");
+    }
+
+    EXPECT_EQ(0., cv::norm(ref, out_mat, cv::NORM_INF));
+}
+
 } // anonymous namespace
 
 TEST_P(GAPI_Streaming, SmokeTest_ConstInput_GMat)
@@ -1336,13 +1365,45 @@ TEST(Streaming, Python_Pull_Overload)
 
     bool has_output;
     cv::GRunArgs outputs;
-    std::tie(has_output, outputs) = ccomp.pull();
+    using RunArgs = cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>;
+    RunArgs args;
 
-    EXPECT_TRUE(has_output);
-    EXPECT_EQ(1u, outputs.size());
+    std::tie(has_output, args) = ccomp.pull();
 
-    auto out_mat = cv::util::get<cv::Mat>(outputs[0]);
-    EXPECT_EQ(0., cv::norm(in_mat, out_mat, cv::NORM_INF));
+    checkPullOverload(in_mat, has_output, args);
+
+    ccomp.stop();
+    EXPECT_FALSE(ccomp.running());
+}
+
+TEST(GAPI_Streaming_Desync, Python_Pull_Overload)
+{
+    cv::GMat in;
+    cv::GMat out = cv::gapi::streaming::desync(in);
+    cv::GComputation c(in, out);
+
+    cv::Size sz(3,3);
+    cv::Mat in_mat(sz, CV_8UC3);
+    cv::randu(in_mat, cv::Scalar::all(0), cv::Scalar(255));
+
+    auto ccomp = c.compileStreaming();
+
+    EXPECT_TRUE(ccomp);
+    EXPECT_FALSE(ccomp.running());
+
+    ccomp.setSource(cv::gin(in_mat));
+
+    ccomp.start();
+    EXPECT_TRUE(ccomp.running());
+
+    bool has_output;
+    cv::GRunArgs outputs;
+    using RunArgs = cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>;
+    RunArgs args;
+
+    std::tie(has_output, args) = ccomp.pull();
+
+    checkPullOverload(in_mat, has_output, args);
 
     ccomp.stop();
     EXPECT_FALSE(ccomp.running());
@@ -2132,9 +2193,17 @@ TEST(GAPI_Streaming, TestPythonAPI)
 
     bool is_over = false;
     cv::GRunArgs out_args;
+    using RunArgs = cv::util::variant<cv::GRunArgs, cv::GOptRunArgs>;
+    RunArgs args;
 
     // NB: Used by python bridge
-    std::tie(is_over, out_args) = cc.pull();
+    std::tie(is_over, args) = cc.pull();
+
+    switch (args.index()) {
+        case RunArgs::index_of<cv::GRunArgs>():
+            out_args = util::get<cv::GRunArgs>(args); break;
+        default: GAPI_Assert(false && "Incorrect type of return value");
+    }
 
     ASSERT_EQ(1u, out_args.size());
     ASSERT_TRUE(cv::util::holds_alternative<cv::Mat>(out_args[0]));
@@ -2145,4 +2214,69 @@ TEST(GAPI_Streaming, TestPythonAPI)
     cc.stop();
 }
 
+TEST(GAPI_Streaming, TestDesyncRMat) {
+    cv::GMat in;
+    auto blurred = cv::gapi::blur(in, cv::Size{3,3});
+    auto desynced = cv::gapi::streaming::desync(blurred);
+    auto out = in - blurred;
+    auto pipe = cv::GComputation(cv::GIn(in), cv::GOut(desynced, out)).compileStreaming();
+
+    cv::Size sz(32,32);
+    cv::Mat in_mat(sz, CV_8UC3);
+    cv::randu(in_mat, cv::Scalar::all(0), cv::Scalar(255));
+    pipe.setSource(cv::gin(in_mat));
+    pipe.start();
+
+    cv::optional<cv::RMat> out_desync;
+    cv::optional<cv::RMat> out_rmat;
+    while (true) {
+        // Initially it throwed "bad variant access" since there was
+        // no RMat handling in wrap_opt_arg
+        EXPECT_NO_THROW(pipe.pull(cv::gout(out_desync, out_rmat)));
+        if (out_rmat) break;
+    }
+}
+
+G_API_OP(GTestBlur, <GFrame(GFrame)>, "test.blur") {
+    static GFrameDesc outMeta(GFrameDesc d) { return d; }
+};
+GAPI_OCV_KERNEL(GOcvTestBlur, GTestBlur) {
+    static void run(const cv::MediaFrame& in, cv::MediaFrame& out) {
+        auto d = in.desc();
+        GAPI_Assert(d.fmt == cv::MediaFormat::BGR);
+        auto view = in.access(cv::MediaFrame::Access::R);
+        cv::Mat mat(d.size, CV_8UC3, view.ptr[0]);
+        cv::Mat blurred;
+        cv::blur(mat, blurred, cv::Size{3,3});
+        out = cv::MediaFrame::Create<TestMediaBGR>(blurred);
+    }
+};
+
+TEST(GAPI_Streaming, TestDesyncMediaFrame) {
+    initTestDataPath();
+    cv::GFrame in;
+    auto blurred = GTestBlur::on(in);
+    auto desynced = cv::gapi::streaming::desync(blurred);
+    auto out = GTestBlur::on(blurred);
+    auto pipe = cv::GComputation(cv::GIn(in), cv::GOut(desynced, out))
+        .compileStreaming(cv::compile_args(cv::gapi::kernels<GOcvTestBlur>()));
+
+    std::string filepath = findDataFile("cv/video/768x576.avi");
+    try {
+        pipe.setSource<BGRSource>(filepath);
+    } catch(...) {
+        throw SkipTestException("Video file can not be opened");
+    }
+    pipe.start();
+
+    cv::optional<cv::MediaFrame> out_desync;
+    cv::optional<cv::MediaFrame> out_frame;
+    while (true) {
+        // Initially it throwed "bad variant access" since there was
+        // no MediaFrame handling in wrap_opt_arg
+        EXPECT_NO_THROW(pipe.pull(cv::gout(out_desync, out_frame)));
+        if (out_frame) break;
+    }
+}
+
 } // namespace opencv_test

modules/python/src2/cv2.cpp

@@ -2219,12 +2219,6 @@ static PyMethodDef special_methods[] = {
 #ifdef HAVE_OPENCV_DNN
   {"dnn_registerLayer", CV_PY_FN_WITH_KW(pyopencv_cv_dnn_registerLayer), "registerLayer(type, class) -> None"},
   {"dnn_unregisterLayer", CV_PY_FN_WITH_KW(pyopencv_cv_dnn_unregisterLayer), "unregisterLayer(type) -> None"},
-#endif
-#ifdef HAVE_OPENCV_GAPI
-  {"GIn", CV_PY_FN_WITH_KW(pyopencv_cv_GIn), "GIn(...) -> GInputProtoArgs"},
-  {"GOut", CV_PY_FN_WITH_KW(pyopencv_cv_GOut), "GOut(...) -> GOutputProtoArgs"},
-  {"gin", CV_PY_FN_WITH_KW(pyopencv_cv_gin), "gin(...) -> ExtractArgsCallback"},
-  {"descr_of", CV_PY_FN_WITH_KW(pyopencv_cv_descr_of), "descr_of(...) -> ExtractMetaCallback"},
 #endif
   {NULL, NULL},
 };

modules/python/src2/hdr_parser.py

@@ -832,6 +832,7 @@ class CppHeaderParser(object):
                     ("GAPI_EXPORTS_W_SIMPLE","CV_EXPORTS_W_SIMPLE"),
                     ("GAPI_WRAP", "CV_WRAP"),
                     ("GAPI_PROP", "CV_PROP"),
+                    ("GAPI_PROP_RW", "CV_PROP_RW"),
                     ('defined(GAPI_STANDALONE)', '0'),
                 ])