Merge pull request #13133 from elatkin:el/gapi_perf_sobel_2

GAPI (fluid): Sobel 3x3 optimization: CV_SIMD dynamic dispatching (#13133)

* GAPI (fluid): Sobel 3x3: remove template for run_sobel_row()

* GAPI (fluid): Sobel 3x3: dynamic dispatching of CV_SIMD code

* GAPI (fluid): Sobel 3x3 optimization: fixed CV_SIMD dynamic dispatcher

modules/gapi/CMakeLists.txt

@@ -69,7 +69,7 @@ set(gapi_srcs
     src/backends/fluid/gfluidbuffer.cpp
     src/backends/fluid/gfluidbackend.cpp
     src/backends/fluid/gfluidimgproc.cpp
-    src/backends/fluid/gfluidimgproc_func.cpp
+    src/backends/fluid/gfluidimgproc_func.dispatch.cpp
     src/backends/fluid/gfluidcore.cpp
 
     # GPU Backend (currently built-in)
@@ -78,12 +78,13 @@ set(gapi_srcs
     src/backends/gpu/ggpuimgproc.cpp
     src/backends/gpu/ggpucore.cpp
 
-
     # Compound
     src/backends/common/gcompoundbackend.cpp
     src/backends/common/gcompoundkernel.cpp
     )
 
+ocv_add_dispatched_file(backends/fluid/gfluidimgproc_func SSE4_1 AVX2)
+
 ocv_list_add_prefix(gapi_srcs "${CMAKE_CURRENT_LIST_DIR}/")
 
 # For IDE users

modules/gapi/src/backends/fluid/gfluidimgproc.cpp

@@ -768,7 +768,7 @@ static void run_sobel(Buffer& dst,
     int y0 = dst.priv().writeStart();
 //  int y1 = dst.priv().writeEnd();
 
-    run_sobel_impl(out, in, width, chan, kx, ky, border, scale, delta, buf, y, y0);
+    run_sobel_row(out, in, width, chan, kx, ky, border, scale, delta, buf, y, y0);
 }
 
 GAPI_FLUID_KERNEL(GFluidSobel, cv::gapi::imgproc::GSobel, true)

modules/gapi/src/backends/fluid/gfluidimgproc_func.dispatch.cpp

+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+//
+// Copyright (C) 2018 Intel Corporation
+
+#if !defined(GAPI_STANDALONE)
+
+#include "gfluidimgproc_func.hpp"
+#include "gfluidimgproc_func.simd.hpp"
+#if 1
+  // NB: workaround for CV_SIMD bug (or feature?):
+  // - dynamic dispatcher assumes *.simd.hpp is directly in src dir
+  #include "backends/fluid/gfluidimgproc_func.simd_declarations.hpp"
+#else
+  #include                "gfluidimgproc_func.simd_declarations.hpp"
+#endif
+
+#include "gfluidutils.hpp"
+
+#include "opencv2/core/cvdef.h"
+#include "opencv2/core/hal/intrin.hpp"
+
+#include <cmath>
+#include <cstdlib>
+
+#ifdef __GNUC__
+#  pragma GCC diagnostic push
+#  pragma GCC diagnostic ignored "-Wstrict-overflow"
+#endif
+
+namespace cv {
+namespace gapi {
+namespace fluid {
+
+#define RUN_SOBEL_ROW(DST, SRC)                                          \
+void run_sobel_row(DST out[], const SRC *in[], int width, int chan,      \
+                   const float kx[], const float ky[], int border,       \
+                   float scale, float delta, float *buf[],               \
+                   int y, int y0)                                        \
+{                                                                        \
+    CV_CPU_DISPATCH(run_sobel_row,                                       \
+        (out, in, width, chan, kx, ky, border, scale, delta, buf,y, y0), \
+        CV_CPU_DISPATCH_MODES_ALL);                                      \
+}
+
+RUN_SOBEL_ROW(uchar , uchar )
+RUN_SOBEL_ROW(ushort, ushort)
+RUN_SOBEL_ROW( short, uchar )
+RUN_SOBEL_ROW( short, ushort)
+RUN_SOBEL_ROW( short,  short)
+RUN_SOBEL_ROW( float, uchar )
+RUN_SOBEL_ROW( float, ushort)
+RUN_SOBEL_ROW( float,  short)
+RUN_SOBEL_ROW( float,  float)
+
+#undef RUN_SOBEL_ROW
+
+} // namespace fliud
+} // namespace gapi
+} // namespace cv
+
+#endif // !defined(GAPI_STANDALONE)

modules/gapi/src/backends/fluid/gfluidimgproc_func.hpp

@@ -8,6 +8,8 @@
 
 #if !defined(GAPI_STANDALONE)
 
+#include "opencv2/core.hpp"
+
 namespace cv {
 namespace gapi {
 namespace fluid {
@@ -18,12 +20,24 @@ namespace fluid {
 //
 //---------------------
 
-template<typename DST, typename SRC>
-void run_sobel_impl(DST out[], const SRC *in[], int width, int chan,
-                    const float kx[], const float ky[], int border,
-                    float scale, float delta, float *buf[],
+#define RUN_SOBEL_ROW(DST, SRC)                                     \
+void run_sobel_row(DST out[], const SRC *in[], int width, int chan, \
+                   const float kx[], const float ky[], int border,  \
+                   float scale, float delta, float *buf[],          \
                    int y, int y0);
 
+RUN_SOBEL_ROW(uchar , uchar )
+RUN_SOBEL_ROW(ushort, ushort)
+RUN_SOBEL_ROW( short, uchar )
+RUN_SOBEL_ROW( short, ushort)
+RUN_SOBEL_ROW( short,  short)
+RUN_SOBEL_ROW( float, uchar )
+RUN_SOBEL_ROW( float, ushort)
+RUN_SOBEL_ROW( float,  short)
+RUN_SOBEL_ROW( float,  float)
+
+#undef RUN_SOBEL_ROW
+
 }  // namespace fluid
 }  // namespace gapi
 }  // namespace cv