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init - 初始化项目

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Lee Nony
2022-05-06 01:58:53 +08:00
commit 90a5cc7cb6
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7
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if(NOT HAVE_OPENVX)
message(STATUS "OpenVX is not available, disabling openvx-related HAL and stuff")
return()
endif()
set(OPENCV_3P_OPENVX_DIR ${CMAKE_CURRENT_SOURCE_DIR})
add_subdirectory(hal)

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# C++ wrappers for OpenVX-1.x C API
## Core ideas:
* lightweight - minimal overhead vs standard C API
* automatic references counting
* exceptions instead of return codes
* object-oriented design
* (NYI) helpers for user-defined kernels & nodes
* C++ 11 friendly
## Quick start sample
The following short sample gives basic knowledges on the wrappers usage:
```cpp
#include "ivx.hpp"
#include "ivx_lib_debug.hpp" // ivx::debug::*
int main()
{
vx_uint32 width = 640, height = 480;
try
{
ivx::Context context = ivx::Context::create();
ivx::Graph graph = ivx::Graph::create(context);
ivx::Image
gray = ivx::Image::create(context, width, height, VX_DF_IMAGE_U8),
gb = ivx::Image::createVirtual(graph),
res = ivx::Image::create(context, width, height, VX_DF_IMAGE_U8);
context.loadKernels("openvx-debug"); // ivx::debug::*
ivx::debug::fReadImage(context, inputPath, gray);
ivx::Node::create(graph, VX_KERNEL_GAUSSIAN_3x3, gray, gb);
ivx::Node::create(
graph,
VX_KERNEL_THRESHOLD,
gb,
ivx::Threshold::createBinary(context, VX_TYPE_UINT8, 50),
res
);
graph.verify();
graph.process();
ivx::debug::fWriteImage(context, res, "ovx-res-cpp.pgm");
}
catch (const ivx::RuntimeError& e)
{
printf("ErrorRuntime: code = %d(%x), message = %s\n", e.status(), e.status(), e.what());
return e.status();
}
catch (const ivx::WrapperError& e)
{
printf("ErrorWrapper: message = %s\n", e.what());
return -1;
}
catch(const std::exception& e)
{
printf("runtime_error: message = %s\n", e.what());
return -1;
}
return 0;
}
```
## C++ API overview
The wrappers have **header-only** implementation that simplifies their integration to projects.
All the API is inside `ivx` namespace (E.g. `class ivx::Graph`).
While the C++ API is pretty much the same for underlying OpenVX version **1.0** and **1.1**, there are alternative code branches for some features implementation that are selected at **compile time** via `#ifdef` preprocessor directives.
E.g. external ref-counting is implemented for 1.0 version and native OpenVX one is used (via `vxRetainReference()` and `vxReleaseXYZ()`) for version 1.1.
Also there are some **C++ 11** features are used (e.g. rvalue ref-s) when their availability is detected at ***compile time***.
C++ exceptions are used for errors indication instead of return codes. There are two types of exceptions are defined: `RuntimeError` is thrown when OpenVX C call returned unsuccessful result and `WrapperError` is thrown when a problem is occured in the wrappers code. Both exception calsses are derived from `std::exception` (actually from its inheritants).
The so called **OpenVX objects** (e.g. `vx_image`) are represented as C++ classes in wrappers.
All these classes use automatic ref-counting that allows development of exception-safe code.
All these classes have `create()` or `createXYZ()` `static` methods for instances creation. (E.g. `Image::create()`, `Image::createVirtual()` and `Image::createFromHandle()`)
Most of the wrapped OpenVX functions are represented as methods of the corresponding C++ classes, but in most cases they still accept C "object" types (e.g. `vx_image` or `vx_context`) that allows mixing of C and C++ OpenVX API use.
E.g.:
```cpp
class Image
{
static Image create(vx_context context, vx_uint32 width, vx_uint32 height, vx_df_image format);
static Image createVirtual(vx_graph graph, vx_uint32 width = 0, vx_uint32 height = 0, vx_df_image format = VX_DF_IMAGE_VIRT);
// ...
}
```
All the classes instances can automatically be converted to the corresponding C "object" types.
For more details please refer to C++ wrappers reference manual or directly to their source code.

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add_library(openvx_hal STATIC openvx_hal.cpp openvx_hal.hpp ${OPENCV_3P_OPENVX_DIR}/include/ivx.hpp ${OPENCV_3P_OPENVX_DIR}/include/ivx_lib_debug.hpp)
target_include_directories(openvx_hal PUBLIC
${CMAKE_CURRENT_SOURCE_DIR}
${OPENCV_3P_OPENVX_DIR}/include
${CMAKE_SOURCE_DIR}/modules/core/include
${CMAKE_SOURCE_DIR}/modules/imgproc/include
${OPENVX_INCLUDE_DIR})
target_link_libraries(openvx_hal PUBLIC ${OPENVX_LIBRARIES})
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 ${OPENCV_3P_LIB_INSTALL_PATH} COMPONENT dev)
endif()
set(OPENVX_HAL_FOUND TRUE CACHE INTERNAL "")
set(OPENVX_HAL_VERSION 0.0.1 CACHE INTERNAL "")
set(OPENVX_HAL_LIBRARIES "openvx_hal" CACHE INTERNAL "")
set(OPENVX_HAL_HEADERS "${CMAKE_CURRENT_SOURCE_DIR}/openvx_hal.hpp" CACHE INTERNAL "")
set(OPENVX_HAL_INCLUDE_DIRS "${CMAKE_CURRENT_SOURCE_DIR}" "${OPENCV_3P_OPENVX_DIR}/include" "${OPENVX_INCLUDE_DIR}" CACHE INTERNAL "")

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#OpenVX-based HAL implementation.
It's built when OpenVX is available (`HAVE_OPENVX`).
To build OpenCV with OpenVX support add the following **cmake** options:
`-DOPENVX_ROOT=/path/to/prebuilt/openvx -DWITH_OPENVX=YES`

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#ifndef OPENCV_OPENVX_HAL_HPP_INCLUDED
#define OPENCV_OPENVX_HAL_HPP_INCLUDED
#include "opencv2/core/hal/interface.h"
#include "VX/vx.h"
template <typename T>
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);
template <typename T>
int ovx_hal_sub(const T *a, size_t astep, const T *b, size_t bstep, T *c, size_t cstep, int w, int h);
template <typename T>
int ovx_hal_absdiff(const T *a, size_t astep, const T *b, size_t bstep, T *c, size_t cstep, int w, int h);
template <typename T>
int ovx_hal_and(const T *a, size_t astep, const T *b, size_t bstep, T *c, size_t cstep, int w, int h);
template <typename T>
int ovx_hal_or(const T *a, size_t astep, const T *b, size_t bstep, T *c, size_t cstep, int w, int h);
template <typename T>
int ovx_hal_xor(const T *a, size_t astep, const T *b, size_t bstep, T *c, size_t cstep, int w, int h);
int ovx_hal_not(const uchar *a, size_t astep, uchar *c, size_t cstep, int w, int h);
template <typename T>
int ovx_hal_mul(const T *a, size_t astep, const T *b, size_t bstep, T *c, size_t cstep, int w, int h, double scale);
int ovx_hal_merge8u(const uchar **src_data, uchar *dst_data, int len, int cn);
int ovx_hal_resize(int atype, const uchar *a, size_t astep, int aw, int ah, uchar *b, size_t bstep, int bw, int bh, double inv_scale_x, double inv_scale_y, int interpolation);
int ovx_hal_warpAffine(int atype, const uchar *a, size_t astep, int aw, int ah, uchar *b, size_t bstep, int bw, int bh, const double M[6], int interpolation, int borderType, const double borderValue[4]);
int ovx_hal_warpPerspective(int atype, const uchar *a, size_t astep, int aw, int ah, uchar *b, size_t bstep, int bw, int bh, const double M[9], int interpolation, int borderType, const double borderValue[4]);
struct cvhalFilter2D;
int ovx_hal_filterInit(cvhalFilter2D **filter_context, uchar *kernel_data, size_t kernel_step, int kernel_type, int kernel_width, int kernel_height,
int, int, int src_type, int dst_type, int borderType, double delta, int anchor_x, int anchor_y, bool allowSubmatrix, bool allowInplace);
int ovx_hal_filterFree(cvhalFilter2D *filter_context);
int ovx_hal_filter(cvhalFilter2D *filter_context, uchar *a, size_t astep, uchar *b, size_t bstep, int w, int h, int, int, int, int);
int ovx_hal_sepFilterInit(cvhalFilter2D **filter_context, int src_type, int dst_type,
int kernel_type, uchar *kernelx_data, int kernelx_length, uchar *kernely_data, int kernely_length,
int anchor_x, int anchor_y, double delta, int borderType);
#if VX_VERSION > VX_VERSION_1_0
int ovx_hal_morphInit(cvhalFilter2D **filter_context, int operation, int src_type, int dst_type, int , int ,
int kernel_type, uchar *kernel_data, size_t kernel_step, int kernel_width, int kernel_height, int anchor_x, int anchor_y,
int borderType, const double borderValue[4], int iterations, bool allowSubmatrix, bool allowInplace);
int ovx_hal_morphFree(cvhalFilter2D *filter_context);
int ovx_hal_morph(cvhalFilter2D *filter_context, uchar *a, size_t astep, uchar *b, size_t bstep, int w, int h, int , int , int , int , int , int , int , int );
#endif // 1.0 guard
int ovx_hal_cvtBGRtoBGR(const uchar * a, size_t astep, uchar * b, size_t bstep, int w, int h, int depth, int acn, int bcn, bool swapBlue);
int ovx_hal_cvtGraytoBGR(const uchar * a, size_t astep, uchar * b, size_t bstep, int w, int h, int depth, int bcn);
int ovx_hal_cvtTwoPlaneYUVtoBGR(const uchar * a, size_t astep, uchar * b, size_t bstep, int w, int h, int bcn, bool swapBlue, int uIdx);
int ovx_hal_cvtThreePlaneYUVtoBGR(const uchar * a, size_t astep, uchar * b, size_t bstep, int w, int h, int bcn, bool swapBlue, int uIdx);
int ovx_hal_cvtBGRtoThreePlaneYUV(const uchar * a, size_t astep, uchar * b, size_t bstep, int w, int h, int acn, bool swapBlue, int uIdx);
int ovx_hal_cvtOnePlaneYUVtoBGR(const uchar * a, size_t astep, uchar * b, size_t bstep, int w, int h, int bcn, bool swapBlue, int uIdx, int ycn);
int ovx_hal_integral(int depth, int sdepth, int, const uchar * a, size_t astep, uchar * b, size_t bstep, uchar * c, size_t, uchar * d, size_t, int w, int h, int cn);
//==================================================================================================
// 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>
#undef cv_hal_sub8u
#define cv_hal_sub8u ovx_hal_sub<uchar>
#undef cv_hal_sub16s
#define cv_hal_sub16s ovx_hal_sub<short>
#undef cv_hal_absdiff8u
#define cv_hal_absdiff8u ovx_hal_absdiff<uchar>
#undef cv_hal_absdiff16s
#define cv_hal_absdiff16s ovx_hal_absdiff<short>
#undef cv_hal_and8u
#define cv_hal_and8u ovx_hal_and<uchar>
#undef cv_hal_or8u
#define cv_hal_or8u ovx_hal_or<uchar>
#undef cv_hal_xor8u
#define cv_hal_xor8u ovx_hal_xor<uchar>
#undef cv_hal_not8u
#define cv_hal_not8u ovx_hal_not
#undef cv_hal_mul8u
#define cv_hal_mul8u ovx_hal_mul<uchar>
#undef cv_hal_mul16s
#define cv_hal_mul16s ovx_hal_mul<short>
#undef cv_hal_merge8u
#define cv_hal_merge8u ovx_hal_merge8u
//#undef cv_hal_resize
//#define cv_hal_resize ovx_hal_resize
//OpenVX warps use round to zero policy at least in sample implementation
//while OpenCV require round to nearest
//#undef cv_hal_warpAffine
//#define cv_hal_warpAffine ovx_hal_warpAffine
//#undef cv_hal_warpPerspective
//#define cv_hal_warpPerspective ovx_hal_warpPerspective
#undef cv_hal_filterInit
#define cv_hal_filterInit ovx_hal_filterInit
#undef cv_hal_filter
#define cv_hal_filter ovx_hal_filter
#undef cv_hal_filterFree
#define cv_hal_filterFree ovx_hal_filterFree
//#undef cv_hal_sepFilterInit
//#define cv_hal_sepFilterInit ovx_hal_sepFilterInit
//#undef cv_hal_sepFilter
//#define cv_hal_sepFilter ovx_hal_filter
//#undef cv_hal_sepFilterFree
//#define cv_hal_sepFilterFree ovx_hal_filterFree
#if VX_VERSION > VX_VERSION_1_0
#undef cv_hal_morphInit
#define cv_hal_morphInit ovx_hal_morphInit
#undef cv_hal_morph
#define cv_hal_morph ovx_hal_morph
#undef cv_hal_morphFree
#define cv_hal_morphFree ovx_hal_morphFree
#endif // 1.0 guard
#undef cv_hal_cvtBGRtoBGR
#define cv_hal_cvtBGRtoBGR ovx_hal_cvtBGRtoBGR
#undef cv_hal_cvtGraytoBGR
#define cv_hal_cvtGraytoBGR ovx_hal_cvtGraytoBGR
#undef cv_hal_cvtTwoPlaneYUVtoBGR
#define cv_hal_cvtTwoPlaneYUVtoBGR ovx_hal_cvtTwoPlaneYUVtoBGR
#undef cv_hal_cvtThreePlaneYUVtoBGR
#define cv_hal_cvtThreePlaneYUVtoBGR ovx_hal_cvtThreePlaneYUVtoBGR
#undef cv_hal_cvtBGRtoThreePlaneYUV
#define cv_hal_cvtBGRtoThreePlaneYUV ovx_hal_cvtBGRtoThreePlaneYUV
#undef cv_hal_cvtOnePlaneYUVtoBGR
#define cv_hal_cvtOnePlaneYUVtoBGR ovx_hal_cvtOnePlaneYUVtoBGR
#undef cv_hal_integral
#define cv_hal_integral ovx_hal_integral
#endif

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// 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) 2016, Intel Corporation, all rights reserved.
// Third party copyrights are property of their respective owners.
/*
C++ wrappers over OpenVX 1.x C API ("openvx-debug" module)
Details: TBD
*/
#pragma once
#ifndef IVX_LIB_DEBUG_HPP
#define IVX_LIB_DEBUG_HPP
#include "ivx.hpp"
namespace ivx
{
namespace debug
{
/*
* "openvx-debug" module
*/
//
void fReadImage(vx_context c, const std::string& path, vx_image img)
{
IVX_CHECK_STATUS( vxuFReadImage(c, (vx_char*)path.c_str(), img) );
}
//
void fWriteImage(vx_context c, vx_image img, const std::string& path)
{
IVX_CHECK_STATUS( vxuFWriteImage(c, img, (vx_char*)path.c_str()) );
}
} // namespace debug
} // namespace ivx
#endif //IVX_LIB_DEBUG_HPP