OpenVX HAL

3rdparty/openvx/CMakeLists.txt

@@ -0,0 +1,17 @@
+add_library(openvx_hal STATIC src/openvx_hal.cpp)
+target_include_directories(openvx_hal PUBLIC
+  ${CMAKE_CURRENT_SOURCE_DIR}/include
+  ${CMAKE_SOURCE_DIR}/modules/core/include
+  ${OPENVX_INCLUDE_DIR})
+target_link_libraries(openvx_hal LINK_PUBLIC ${OPENVX_LIBRARIES})
+set_target_properties(openvx_hal PROPERTIES POSITION_INDEPENDENT_CODE TRUE)
+set_target_properties(openvx_hal PROPERTIES ARCHIVE_OUTPUT_DIRECTORY ${3P_LIBRARY_OUTPUT_PATH})
+if(NOT BUILD_SHARED_LIBS)
+  ocv_install_target(openvx_hal EXPORT OpenCVModules ARCHIVE DESTINATION ${OPENCV_3P_LIB_INSTALL_PATH} COMPONENT dev)
+endif()
+
+set(OPENVX_HAL_FOUND TRUE PARENT_SCOPE)
+set(OPENVX_HAL_VERSION 0.0.1 PARENT_SCOPE)
+set(OPENVX_HAL_LIBRARIES "openvx_hal" PARENT_SCOPE)
+set(OPENVX_HAL_HEADERS "${CMAKE_CURRENT_SOURCE_DIR}/include/openvx_hal.hpp" PARENT_SCOPE)
+set(OPENVX_HAL_INCLUDE_DIRS "${CMAKE_CURRENT_SOURCE_DIR}/include" "${OPENVX_INCLUDE_DIR}" PARENT_SCOPE)

3rdparty/openvx/include/openvx_hal.hpp

@@ -0,0 +1,196 @@
+#ifndef OPENCV_OPENVX_HAL_HPP_INCLUDED
+#define OPENCV_OPENVX_HAL_HPP_INCLUDED
+
+#include "opencv2/core/hal/interface.h"
+
+#include "VX/vx.h"
+#include "VX/vxu.h"
+
+#include <string>
+
+//==================================================================================================
+// utility
+// ...
+
+#if 0
+#include <cstdio>
+#define PRINT(...) printf(__VA_ARGS__)
+#else
+#define PRINT(...)
+#endif
+
+#if __cplusplus >= 201103L
+#include <chrono>
+struct Tick
+{
+    typedef std::chrono::time_point<std::chrono::steady_clock> point_t;
+    point_t start;
+    point_t point;
+    Tick()
+    {
+        start = std::chrono::steady_clock::now();
+        point = std::chrono::steady_clock::now();
+    }
+    inline int one()
+    {
+        point_t old = point;
+        point = std::chrono::steady_clock::now();
+        return std::chrono::duration_cast<std::chrono::microseconds>(point - old).count();
+    }
+    inline int total()
+    {
+        return std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::steady_clock::now() - start).count();
+    }
+};
+#endif
+
+//==================================================================================================
+// One more OpenVX C++ binding :-)
+// ...
+
+template <typename T>
+struct VX_Traits
+{
+    enum {
+        Type = 0
+    };
+};
+
+template <>
+struct VX_Traits<uchar>
+{
+    enum {
+        Type = VX_DF_IMAGE_U8
+    };
+};
+
+template <>
+struct VX_Traits<ushort>
+{
+    enum {
+        Type = VX_DF_IMAGE_U16
+    };
+};
+
+template <>
+struct VX_Traits<short>
+{
+    enum {
+        Type = VX_DF_IMAGE_S16
+    };
+};
+
+
+struct vxContext;
+struct vxImage;
+struct vxErr;
+
+
+struct vxErr
+{
+    vx_status status;
+    std::string msg;
+    vxErr(vx_status status_, const std::string & msg_) : status(status_), msg(msg_) {}
+    void check()
+    {
+        if (status != VX_SUCCESS)
+            throw *this;
+    }
+    void print()
+    {
+        PRINT("OpenVX HAL impl error: %d (%s)\n", status, msg.c_str());
+    }
+    static void check(vx_context ctx)
+    {
+        vxErr(vxGetStatus((vx_reference)ctx), "context check").check();
+    }
+    static void check(vx_image img)
+    {
+        vxErr(vxGetStatus((vx_reference)img), "image check").check();
+    }
+    static void check(vx_status s)
+    {
+        vxErr(s, "status check").check();
+    }
+};
+
+
+struct vxContext
+{
+    vx_context ctx;
+    static vxContext * getContext();
+private:
+    vxContext()
+    {
+        ctx = vxCreateContext();
+        vxErr::check(ctx);
+    }
+    ~vxContext()
+    {
+        vxReleaseContext(&ctx);
+    }
+};
+
+
+struct vxImage
+{
+    vx_image img;
+
+    template <typename T>
+    vxImage(vxContext &ctx, const T *data, size_t step, int w, int h)
+    {
+        if (h == 1)
+            step = w * sizeof(T);
+        vx_imagepatch_addressing_t addr;
+        addr.dim_x = w;
+        addr.dim_y = h;
+        addr.stride_x = sizeof(T);
+        addr.stride_y = step;
+        addr.scale_x = VX_SCALE_UNITY;
+        addr.scale_y = VX_SCALE_UNITY;
+        addr.step_x = 1;
+        addr.step_y = 1;
+        void *ptrs[] = { (void*)data };
+        img = vxCreateImageFromHandle(ctx.ctx, VX_Traits<T>::Type, &addr, ptrs, VX_MEMORY_TYPE_HOST);
+        vxErr::check(img);
+    }
+    ~vxImage()
+    {
+        vxSwapImageHandle(img, NULL, NULL, 1);
+        vxReleaseImage(&img);
+    }
+};
+
+//==================================================================================================
+// real code starts here
+// ...
+
+template <typename T>
+inline int ovx_hal_add(const T *a, size_t astep, const T *b, size_t bstep, T *c, size_t cstep, int w, int h)
+{
+    try
+    {
+        vxContext * ctx = vxContext::getContext();
+        vxImage ia(*ctx, a, astep, w, h);
+        vxImage ib(*ctx, b, bstep, w, h);
+        vxImage ic(*ctx, c, cstep, w, h);
+        vxErr::check(vxuAdd(ctx->ctx, ia.img, ib.img, VX_CONVERT_POLICY_SATURATE, ic.img));
+    }
+    catch (vxErr & e)
+    {
+        e.print();
+        return CV_HAL_ERROR_UNKNOWN;
+    }
+    return CV_HAL_ERROR_OK;
+}
+
+//==================================================================================================
+// functions redefinition
+// ...
+
+#undef cv_hal_add8u
+#define cv_hal_add8u ovx_hal_add<uchar>
+#undef cv_hal_add16s
+#define cv_hal_add16s ovx_hal_add<short>
+
+#endif

3rdparty/openvx/src/openvx_hal.cpp

@@ -0,0 +1,8 @@
+#include "openvx_hal.hpp"
+
+vxContext * vxContext::getContext()
+{
+    // not thread safe
+    static vxContext instance;
+    return &instance;
+}