Merge pull request #20555 from TolyaTalamanov:at/fix-compileStreaming-bug

[G-API] Extend compileStreaming to support different overloads

* Make different overloads

* Order python compileStreaming overloads

* Fix compileStreaming bug

* Replace

gin -> descr_of

* Set error message

* Fix review comments

* Use macros for pyopencv_to GMetaArgs
* Use GAPI_PROP_RW
* Not split Prims python stuff

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

@@ -396,9 +396,11 @@ 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/misc/python/package/gapi/__init__.py

@@ -295,3 +295,5 @@ 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

@@ -11,13 +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 vector_GNetParam           = std::vector<cv::gapi::GNetParam>;
+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
@@ -159,7 +160,7 @@ PyObject* pyopencv_from(const cv::gapi::wip::draw::Prims& value)
 }
 
 template<>
-bool pyopencv_to(PyObject* obj, cv::gapi::wip::draw::Prim& value, const ArgInfo& info)
+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))) \
@@ -175,6 +176,7 @@ bool pyopencv_to(PyObject* obj, cv::gapi::wip::draw::Prim& value, const ArgInfo&
     TRY_EXTRACT(Mosaic)
     TRY_EXTRACT(Image)
     TRY_EXTRACT(Poly)
+#undef TRY_EXTRACT
 
     failmsg("Unsupported primitive type");
     return false;
@@ -186,6 +188,34 @@ bool pyopencv_to(PyObject* obj, cv::gapi::wip::draw::Prims& value, const ArgInfo
     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)
 {
@@ -707,30 +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)

modules/gapi/misc/python/shadow_gapi.hpp

@@ -5,8 +5,9 @@ namespace cv
 {
 struct GAPI_EXPORTS_W_SIMPLE GCompileArg
 {
-    GAPI_WRAP GCompileArg(gapi::GKernelPackage pkg);
-    GAPI_WRAP GCompileArg(gapi::GNetPackage pkg);
+    GAPI_WRAP GCompileArg(gapi::GKernelPackage arg);
+    GAPI_WRAP GCompileArg(gapi::GNetPackage arg);
+    GAPI_WRAP GCompileArg(gapi::streaming::queue_capacity arg);
 };
 
 class GAPI_EXPORTS_W_SIMPLE GInferInputs

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

@@ -261,6 +261,7 @@ try:
                 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']])
 
@@ -307,6 +308,49 @@ try:
             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)