OpenCV源码浅析——MatExpr到Mat是怎么赋值的？

作者: BetterCV | 来源:发表于2020-04-16 21:54 被阅读0次

在公司里做视觉AI落地，少不了参考和移植OpenCV的源码。譬如最常见的Mat类对象，做一个减均值的操作，用起来一句话，底层实现其实一堆，调试下来真的是冰山一角的感觉。今天就来说说非SIMD优化情况下的MatExpr到Mat的赋值是怎么实现的。

用的是OpenCV 3.4.9版本，基本上和最新（4.3.0）版本的实现一致。基于VS2017，VSCode，Git，GitBash等工具。

0. HighLevel的函数调用：

Mat a(3, 3, CV_64FC1, Scalar::all(1));
Mat b = a - 1.5;

看，是不是很简单？一个3x3的double类型的矩阵，元素取值都是1；所有元素都减去1.5（也就是Python中所谓的broadcast广播，Matlab中也有类似的原生支持功能）。

实际上断点调试一下就发现没那么简单。1.5是double双精度浮点数，会被转换为Scalar对象；Mat对象和Scalar对象相减，结果是MatExpr类型，是做了转换才得到Mat类型的。等价于：

Mat a(3, 3, CV_64FC1, Scalar::all(1));
Scalar c = 1.5;
MatExpr d = a - c;
Mat e = d;

只关注Mat e=d这一步，看似无聊没用，但如果是移植OpenCV为自己的产品所用，发现这其中还不是简单的调试断点就能搞清楚的。

先尝试了最简单的断点调试（需要OpenCV源码debug模式编译），关键几个调用：

image.png

image.png
其中getAddTab()的一个trick是，函数内用static变量作为返回值，由于存储在静态存储区并且用编译阶段确定的函数名来赋值，因此我们调试进来的时候就晚了（没赶在初始化之前设定断点），于是我稍微修改后得以停留。不过并没有什么用，cv::hal::add64f并不能跳转到定义。

接下来就贴一下，add64f是怎么被定义和调用的（简单说来，它是用宏trick来定义函数的，个人觉得比较hack）。

1. `getAddTab()`返回的是函数指针数组，为什么它返回的时候我没法设断点？

因为是static局部变量，并且用已经存在的函数初始化的。程序一旦运行，这个局部变量的值就确定了，也就是被初始化过了，当然没法设断点了。搞他！

    //static BinaryFuncC addTab[] =
 //{
 //    (BinaryFuncC)GET_OPTIMIZED(cv::hal::add8u), (BinaryFuncC)GET_OPTIMIZED(cv::hal::add8s),
 //    (BinaryFuncC)GET_OPTIMIZED(cv::hal::add16u), (BinaryFuncC)GET_OPTIMIZED(cv::hal::add16s),
 //    (BinaryFuncC)GET_OPTIMIZED(cv::hal::add32s),
 //    (BinaryFuncC)GET_OPTIMIZED(cv::hal::add32f), (BinaryFuncC)cv::hal::add64f,
 //    0
 //};
 BinaryFuncC a[8];
 a[0] = (BinaryFuncC)GET_OPTIMIZED(cv::hal::add8u);
 a[1] = (BinaryFuncC)GET_OPTIMIZED(cv::hal::add8s);
 a[2] = (BinaryFuncC)GET_OPTIMIZED(cv::hal::add16u);
 a[3] = (BinaryFuncC)GET_OPTIMIZED(cv::hal::add16s);
 a[4] = (BinaryFuncC)GET_OPTIMIZED(cv::hal::add32s);
 a[5] = (BinaryFuncC)GET_OPTIMIZED(cv::hal::add32f);
 a[6] = (BinaryFuncC)cv::hal::add64f;
 a[7] = 0;

 static BinaryFuncC addTab[] = {
     a[0], a[1], a[2], a[3], a[4], a[5], a[6],a[7]
 };

2. 后续其它函数中，发现调用的是函数指针表中的索引为6的，也就是`cv::hal::add64f`函数。

这个函数在哪里实现的？

能够断点到这个宏：

DEFINE_SIMD_ALL(add, op_add)

接着断点到如下模板函数：(arithm.simd.hpp)

#if !CV_SIMD_64F
template<template<typename T1, typename Tvec> class OP, typename T1, typename Tvec>
static void bin_loop_nosimd(const T1* src1, size_t step1, const T1* src2, size_t step2, T1* dst, size_t step, int width, int height)
{
    typedef OP<T1, Tvec/*dummy*/> op;

    step1 /= sizeof(T1);
    step2 /= sizeof(T1);
    step  /= sizeof(T1);

    for (; height--; src1 += step1, src2 += step2, dst += step)
    {
        int x = 0;

        for (; x <= width - 4; x += 4)
        {
            T1 t0 = op::r(src1[x], src2[x]);
            T1 t1 = op::r(src1[x + 1], src2[x + 1]);
            dst[x] = t0; dst[x + 1] = t1;

            t0 = op::r(src1[x + 2], src2[x + 2]);
            t1 = op::r(src1[x + 3], src2[x + 3]);
            dst[x + 2] = t0; dst[x + 3] = t1;
        }

        for (; x < width; x++)
            dst[x] = op::r(src1[x], src2[x]);
    }
}

为啥会运行到这个函数呢？

3. 调用堆栈：为了搞清楚为啥来这里执行，看看call stack：

arithm_hal_debug_call_stack1.png

字太小了，只看函数名吧：

arithm_hal_debug_call_stack2.png

发现栈顶的两次调用，都是cv::hal::cpu_baseline命名空间(namespace)下的函数。咋没见到这个namespace的定义呢？
其实是有的，但是写成宏定义了。（很垃圾的编码风格。为什么不写namespace而要用宏呢？）

其中，栈顶函数bin_loop_nosimd()就是刚刚贴出来的naive实现的函数（模板函数）；栈顶之下紧接着的函数cv::hal::cpu_baseline::add64f()就是前面贴出来的宏DEFINE_SIMD_ALL(add, op_add)。

4. VS不给做静态语法解析了

那就手动解析：

DEFINE_SIMD_ALL(add, op_add)

第一次展开为：

DEFINE_SIMD_SAT(add, op_add)  \
DEFINE_SIMD_NSAT(add, op_add)

第二次展开为：

DEFINE_SIMD_U8(add, op_add)   \
DEFINE_SIMD_S8(add, op_add)   \
DEFINE_SIMD_U16(add, op_add)  \
DEFINE_SIMD_S16(add, op_add)  \
DEFINE_SIMD_S32(add, op_add)  \
DEFINE_SIMD_F32(add, op_add)  \
DEFINE_SIMD_F64(add, op_add)

从DEFINE_SIMD_U8入手，第一次展开为：

DEFINE_SIMD(__CV_CAT(add, 8u), uchar, v_uint8, op_add)

其中__CV_CAT是做字符串拼接(##连接符实现），因而第二次展开为:

DEFINE_SIMD(add8u, uchar, v_uint8, op_add)

arithm_hal_debug_call_stack4.png

实际上，arithm.cpp中的函数，naive的实现和SIMD的实现的切换，恐怕就是DEFINE_SIMD宏了。

现在我更感兴趣的是，任意的op函数的宏跳转DEFINE_SIMD_ALL(fun, ...)展开。目前展开为

DEFINE_SIMD(__CV_CAT(fun, 8u), uchar, v_uint8, __VA_ARGS__) \
DEFINE_SIMD(__CV_CAT(fun, 8s), schar, v_int8,  __VA_ARGS__) \
DEFINE_SIMD(__CV_CAT(fun, 16u), ushort, v_uint16, __VA_ARGS__) \
DEFINE_SIMD(__CV_CAT(fun, 16s), short, v_int16,  __VA_ARGS__) \
DEFINE_SIMD(__CV_CAT(fun, 32s), int, v_int32,  __VA_ARGS__) \
DEFINE_SIMD(__CV_CAT(fun, 32f), float, v_float32, __VA_ARGS__) \
DEFINE_NOSIMD(__CV_CAT(fun, 64f), double, __VA_ARGS__)

好吧，fun还是换成具体的函数名字比较直观。

DEFINE_SIMD_U8(add, op_add)进一步展开为：

DECLARE_SIMD_FUN(fun_name, uchar) \
DEFINE_SIMD_FUN(fun_name, uchar, v_uint8, op_add)

意思是先声明一个函数，再定义这个函数。呃，用宏定义来实现函数声明和定义，看起来是反射，但是这也太蛋疼了。

大概看一下DEFINE_SIMD_FUN怎么定义的函数？

#define DEFINE_SIMD_FUN(fun, _T1, _Tvec, _OP)     \
    void fun(BIN_ARGS(_T1))                       \
    {                                             \
        CV_INSTRUMENT_REGION();                   \
        bin_loop<_OP, _T1, _Tvec>(BIN_ARGS_PASS); \
    }

哦对了，如果是double类型的数据，那么有时候（我这里关掉所有优化，就是这种情况），调用的是这个：

#define DEFINE_NOSIMD_FUN(fun, _T1, _OP)                     \
    void fun(BIN_ARGS(_T1))                                  \
    {                                                        \
        CV_INSTRUMENT_REGION();                              \
        bin_loop_nosimd<_OP, _T1, v_float64>(BIN_ARGS_PASS); \
    }

至此，终于串起来了前面断点中的函数调用栈的栈顶和次栈顶，以及栈中其它函数。

实际上，MatExpr到Mat的转换，会执行计算。也即是，Mat和Scalar之间的计算，被转换为MatExpr对象，此对象并不立即做计算（MatExpr意思其实就是Math/Matrix Expression），而是到了MatExpr转为Mat的时候再计算。

前面写到的无法跳转的函数add8u和add64f等函数，完整的展开是：

DEFINE_SIMD_ALL(add, op_add)

=>

DEFINE_SIMD_U8(add, op_add)   \
DEFINE_SIMD_S8(add, op_add)   \
DEFINE_SIMD_U16(add, op_add)  \
DEFINE_SIMD_S16(add, op_add)  \
DEFINE_SIMD_S32(add, op_add)  \
DEFINE_SIMD_F32(add, op_add)  \
DEFINE_SIMD_F64(add, op_add)

=>

DEFINE_SIMD(__CV_CAT(add, 8u), uchar, v_uint8, op_add) \
DEFINE_SIMD(__CV_CAT(add, 8s), schar, v_int8,  op_add) \
DEFINE_SIMD(__CV_CAT(add, 16u), ushort, v_uint16, op_add) \
DEFINE_SIMD(__CV_CAT(add, 16s), short, v_int16,  op_add) \
DEFINE_SIMD(__CV_CAT(add, 32s), int, v_int32,  op_add) \
DEFINE_SIMD(__CV_CAT(add, 32f), float, v_float32, op_add) \
DEFINE_NOSIMD(__CV_CAT(add, 64f), double, op_add)

=>

DEFINE_SIMD(add8u, uchar, v_uint8, op_add) \
DEFINE_SIMD(add8s, schar, v_int8,  op_add) \
DEFINE_SIMD(add16u, ushort, v_uint16, op_add) \
DEFINE_SIMD(add16s, short, v_int16,  op_add) \
DEFINE_SIMD(add32s, int, v_int32,  op_add) \
DEFINE_SIMD(add32f, float, v_float32, op_add) \
DEFINE_NOSIMD(add64f, double, op_add)

=>

DECLARE_SIMD_FUN(add8u, uchar) \
DEFINE_SIMD_FUN(add8u, uchar, v_uint8, op_add) \
DECLARE_SIMD_FUN(add8s, schar) \
DEFINE_SIMD_FUN(add8s, schar, v_int8, op_add) \
DECLARE_SIMD_FUN(add16u, ushort) \
DEFINE_SIMD_FUN(add16u, ushort, v_uint16, op_add) \
DECLARE_SIMD_FUN(add16s, short) \
DEFINE_SIMD_FUN(add16s, short, v_int16, op_add) \
DECLARE_SIMD_FUN(add32s, int) \
DEFINE_SIMD_FUN(add32s, int, v_int32, op_add) \
DECLARE_SIMD_FUN(add32f, float) \
DEFINE_SIMD_FUN(add32f, float, v_float32, op_add) \
DECLARE_SIMD_FUN(add64f, double) \
DEFINE_NOSIMD_FUN(add64f, double, op_add)

在Visual Studio里勾选“生成预编译文件”以及“包括注释”

image.png

然后，可以看到add8u等函数的定义(arithm.dispatch.i)

void add8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height); void add8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn539 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn539 = { &(__cv_trace_location_extra_fn539),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 539, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn539);;; bin_loop<op_add, uchar, v_uint8>(src1, step1, src2, step2, dst, step, width, height); } void add8s(const schar* src1, size_t step1, const schar* src2, size_t step2, schar* dst, size_t step, int width, int height); void add8s(const schar* src1, size_t step1, const schar* src2, size_t step2, schar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn539 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn539 = { &(__cv_trace_location_extra_fn539),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 539, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn539);;; bin_loop<op_add, schar, v_int8>(src1, step1, src2, step2, dst, step, width, height); } void add16u(const ushort* src1, size_t step1, const ushort* src2, size_t step2, ushort* dst, size_t step, int width, int height); void add16u(const ushort* src1, size_t step1, const ushort* src2, size_t step2, ushort* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn539 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn539 = { &(__cv_trace_location_extra_fn539),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 539, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn539);;; bin_loop<op_add, ushort, v_uint16>(src1, step1, src2, step2, dst, step, width, height); } void add16s(const short* src1, size_t step1, const short* src2, size_t step2, short* dst, size_t step, int width, int height); void add16s(const short* src1, size_t step1, const short* src2, size_t step2, short* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn539 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn539 = { &(__cv_trace_location_extra_fn539),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 539, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn539);;; bin_loop<op_add, short, v_int16>(src1, step1, src2, step2, dst, step, width, height); } void add32s(const int* src1, size_t step1, const int* src2, size_t step2, int* dst, size_t step, int width, int height); void add32s(const int* src1, size_t step1, const int* src2, size_t step2, int* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn539 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn539 = { &(__cv_trace_location_extra_fn539),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 539, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn539);;; bin_loop<op_add, int, v_int32>(src1, step1, src2, step2, dst, step, width, height); } void add32f(const float* src1, size_t step1, const float* src2, size_t step2, float* dst, size_t step, int width, int height); void add32f(const float* src1, size_t step1, const float* src2, size_t step2, float* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn539 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn539 = { &(__cv_trace_location_extra_fn539),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 539, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn539);;; bin_loop<op_add, float, v_float32>(src1, step1, src2, step2, dst, step, width, height); } void add64f(const double* src1, size_t step1, const double* src2, size_t step2, double* dst, size_t step, int width, int height); void add64f(const double* src1, size_t step1, const double* src2, size_t step2, double* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn539 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn539 = { &(__cv_trace_location_extra_fn539),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 539, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn539);;; bin_loop_nosimd<op_add, double, v_float64>(src1, step1, src2, step2, dst, step, width, height); }
void sub8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height); void sub8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn540 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn540 = { &(__cv_trace_location_extra_fn540),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 540, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn540);;; bin_loop<op_sub, uchar, v_uint8>(src1, step1, src2, step2, dst, step, width, height); } void sub8s(const schar* src1, size_t step1, const schar* src2, size_t step2, schar* dst, size_t step, int width, int height); void sub8s(const schar* src1, size_t step1, const schar* src2, size_t step2, schar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn540 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn540 = { &(__cv_trace_location_extra_fn540),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 540, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn540);;; bin_loop<op_sub, schar, v_int8>(src1, step1, src2, step2, dst, step, width, height); } void sub16u(const ushort* src1, size_t step1, const ushort* src2, size_t step2, ushort* dst, size_t step, int width, int height); void sub16u(const ushort* src1, size_t step1, const ushort* src2, size_t step2, ushort* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn540 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn540 = { &(__cv_trace_location_extra_fn540),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 540, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn540);;; bin_loop<op_sub, ushort, v_uint16>(src1, step1, src2, step2, dst, step, width, height); } void sub16s(const short* src1, size_t step1, const short* src2, size_t step2, short* dst, size_t step, int width, int height); void sub16s(const short* src1, size_t step1, const short* src2, size_t step2, short* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn540 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn540 = { &(__cv_trace_location_extra_fn540),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 540, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn540);;; bin_loop<op_sub, short, v_int16>(src1, step1, src2, step2, dst, step, width, height); } void sub32s(const int* src1, size_t step1, const int* src2, size_t step2, int* dst, size_t step, int width, int height); void sub32s(const int* src1, size_t step1, const int* src2, size_t step2, int* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn540 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn540 = { &(__cv_trace_location_extra_fn540),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 540, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn540);;; bin_loop<op_sub, int, v_int32>(src1, step1, src2, step2, dst, step, width, height); } void sub32f(const float* src1, size_t step1, const float* src2, size_t step2, float* dst, size_t step, int width, int height); void sub32f(const float* src1, size_t step1, const float* src2, size_t step2, float* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn540 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn540 = { &(__cv_trace_location_extra_fn540),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 540, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn540);;; bin_loop<op_sub, float, v_float32>(src1, step1, src2, step2, dst, step, width, height); } void sub64f(const double* src1, size_t step1, const double* src2, size_t step2, double* dst, size_t step, int width, int height); void sub64f(const double* src1, size_t step1, const double* src2, size_t step2, double* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn540 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn540 = { &(__cv_trace_location_extra_fn540),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 540, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn540);;; bin_loop_nosimd<op_sub, double, v_float64>(src1, step1, src2, step2, dst, step, width, height); }

void min8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height); void min8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn542 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn542 = { &(__cv_trace_location_extra_fn542),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 542, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn542);;; bin_loop<op_min, uchar, v_uint8>(src1, step1, src2, step2, dst, step, width, height); } void min8s(const schar* src1, size_t step1, const schar* src2, size_t step2, schar* dst, size_t step, int width, int height); void min8s(const schar* src1, size_t step1, const schar* src2, size_t step2, schar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn542 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn542 = { &(__cv_trace_location_extra_fn542),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 542, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn542);;; bin_loop<op_min, schar, v_int8>(src1, step1, src2, step2, dst, step, width, height); } void min16u(const ushort* src1, size_t step1, const ushort* src2, size_t step2, ushort* dst, size_t step, int width, int height); void min16u(const ushort* src1, size_t step1, const ushort* src2, size_t step2, ushort* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn542 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn542 = { &(__cv_trace_location_extra_fn542),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 542, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn542);;; bin_loop<op_min, ushort, v_uint16>(src1, step1, src2, step2, dst, step, width, height); } void min16s(const short* src1, size_t step1, const short* src2, size_t step2, short* dst, size_t step, int width, int height); void min16s(const short* src1, size_t step1, const short* src2, size_t step2, short* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn542 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn542 = { &(__cv_trace_location_extra_fn542),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 542, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn542);;; bin_loop<op_min, short, v_int16>(src1, step1, src2, step2, dst, step, width, height); } void min32s(const int* src1, size_t step1, const int* src2, size_t step2, int* dst, size_t step, int width, int height); void min32s(const int* src1, size_t step1, const int* src2, size_t step2, int* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn542 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn542 = { &(__cv_trace_location_extra_fn542),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 542, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn542);;; bin_loop<op_min, int, v_int32>(src1, step1, src2, step2, dst, step, width, height); } void min32f(const float* src1, size_t step1, const float* src2, size_t step2, float* dst, size_t step, int width, int height); void min32f(const float* src1, size_t step1, const float* src2, size_t step2, float* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn542 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn542 = { &(__cv_trace_location_extra_fn542),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 542, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn542);;; bin_loop<op_min, float, v_float32>(src1, step1, src2, step2, dst, step, width, height); } void min64f(const double* src1, size_t step1, const double* src2, size_t step2, double* dst, size_t step, int width, int height); void min64f(const double* src1, size_t step1, const double* src2, size_t step2, double* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn542 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn542 = { &(__cv_trace_location_extra_fn542),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 542, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn542);;; bin_loop_nosimd<op_min, double, v_float64>(src1, step1, src2, step2, dst, step, width, height); }
void max8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height); void max8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn543 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn543 = { &(__cv_trace_location_extra_fn543),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 543, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn543);;; bin_loop<op_max, uchar, v_uint8>(src1, step1, src2, step2, dst, step, width, height); } void max8s(const schar* src1, size_t step1, const schar* src2, size_t step2, schar* dst, size_t step, int width, int height); void max8s(const schar* src1, size_t step1, const schar* src2, size_t step2, schar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn543 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn543 = { &(__cv_trace_location_extra_fn543),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 543, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn543);;; bin_loop<op_max, schar, v_int8>(src1, step1, src2, step2, dst, step, width, height); } void max16u(const ushort* src1, size_t step1, const ushort* src2, size_t step2, ushort* dst, size_t step, int width, int height); void max16u(const ushort* src1, size_t step1, const ushort* src2, size_t step2, ushort* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn543 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn543 = { &(__cv_trace_location_extra_fn543),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 543, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn543);;; bin_loop<op_max, ushort, v_uint16>(src1, step1, src2, step2, dst, step, width, height); } void max16s(const short* src1, size_t step1, const short* src2, size_t step2, short* dst, size_t step, int width, int height); void max16s(const short* src1, size_t step1, const short* src2, size_t step2, short* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn543 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn543 = { &(__cv_trace_location_extra_fn543),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 543, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn543);;; bin_loop<op_max, short, v_int16>(src1, step1, src2, step2, dst, step, width, height); } void max32s(const int* src1, size_t step1, const int* src2, size_t step2, int* dst, size_t step, int width, int height); void max32s(const int* src1, size_t step1, const int* src2, size_t step2, int* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn543 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn543 = { &(__cv_trace_location_extra_fn543),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 543, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn543);;; bin_loop<op_max, int, v_int32>(src1, step1, src2, step2, dst, step, width, height); } void max32f(const float* src1, size_t step1, const float* src2, size_t step2, float* dst, size_t step, int width, int height); void max32f(const float* src1, size_t step1, const float* src2, size_t step2, float* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn543 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn543 = { &(__cv_trace_location_extra_fn543),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 543, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn543);;; bin_loop<op_max, float, v_float32>(src1, step1, src2, step2, dst, step, width, height); } void max64f(const double* src1, size_t step1, const double* src2, size_t step2, double* dst, size_t step, int width, int height); void max64f(const double* src1, size_t step1, const double* src2, size_t step2, double* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn543 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn543 = { &(__cv_trace_location_extra_fn543),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 543, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn543);;; bin_loop_nosimd<op_max, double, v_float64>(src1, step1, src2, step2, dst, step, width, height); }

void absdiff8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height); void absdiff8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn545 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn545 = { &(__cv_trace_location_extra_fn545),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 545, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn545);;; bin_loop<op_absdiff, uchar, v_uint8>(src1, step1, src2, step2, dst, step, width, height); } void absdiff8s(const schar* src1, size_t step1, const schar* src2, size_t step2, schar* dst, size_t step, int width, int height); void absdiff8s(const schar* src1, size_t step1, const schar* src2, size_t step2, schar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn545 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn545 = { &(__cv_trace_location_extra_fn545),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 545, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn545);;; bin_loop<op_absdiff, schar, v_int8>(src1, step1, src2, step2, dst, step, width, height); } void absdiff16u(const ushort* src1, size_t step1, const ushort* src2, size_t step2, ushort* dst, size_t step, int width, int height); void absdiff16u(const ushort* src1, size_t step1, const ushort* src2, size_t step2, ushort* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn545 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn545 = { &(__cv_trace_location_extra_fn545),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 545, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn545);;; bin_loop<op_absdiff, ushort, v_uint16>(src1, step1, src2, step2, dst, step, width, height); } void absdiff16s(const short* src1, size_t step1, const short* src2, size_t step2, short* dst, size_t step, int width, int height); void absdiff16s(const short* src1, size_t step1, const short* src2, size_t step2, short* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn545 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn545 = { &(__cv_trace_location_extra_fn545),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 545, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn545);;; bin_loop<op_absdiff, short, v_int16>(src1, step1, src2, step2, dst, step, width, height); } void absdiff32s(const int* src1, size_t step1, const int* src2, size_t step2, int* dst, size_t step, int width, int height); void absdiff32s(const int* src1, size_t step1, const int* src2, size_t step2, int* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn545 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn545 = { &(__cv_trace_location_extra_fn545),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 545, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn545);;; bin_loop<op_absdiff, int, v_int32>(src1, step1, src2, step2, dst, step, width, height); } void absdiff32f(const float* src1, size_t step1, const float* src2, size_t step2, float* dst, size_t step, int width, int height); void absdiff32f(const float* src1, size_t step1, const float* src2, size_t step2, float* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn545 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn545 = { &(__cv_trace_location_extra_fn545),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 545, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn545);;; bin_loop<op_absdiff, float, v_float32>(src1, step1, src2, step2, dst, step, width, height); } void absdiff64f(const double* src1, size_t step1, const double* src2, size_t step2, double* dst, size_t step, int width, int height); void absdiff64f(const double* src1, size_t step1, const double* src2, size_t step2, double* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn545 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn545 = { &(__cv_trace_location_extra_fn545),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 545, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn545);;; bin_loop_nosimd<op_absdiff, double, v_float64>(src1, step1, src2, step2, dst, step, width, height); }

void or8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height); void or8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn547 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn547 = { &(__cv_trace_location_extra_fn547),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 547, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn547);;; bin_loop<op_or, uchar, v_uint8>(src1, step1, src2, step2, dst, step, width, height); }
void xor8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height); void xor8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn548 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn548 = { &(__cv_trace_location_extra_fn548),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 548, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn548);;; bin_loop<op_xor, uchar, v_uint8>(src1, step1, src2, step2, dst, step, width, height); }
void and8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height); void and8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height) { ; static cv::utils::trace::details::Region::LocationExtraData* __cv_trace_location_extra_fn549 = 0; static const cv::utils::trace::details::Region::LocationStaticStorage __cv_trace_location_fn549 = { &(__cv_trace_location_extra_fn549),   __FUNCSIG__   , "e:\\dev\\opencv-3.4.9\\modules\\core\\src\\arithm.simd.hpp", 549, ((0) | cv::utils::trace::details::REGION_FLAG_FUNCTION)};; const cv::utils::trace::details::Region __region_fn(__cv_trace_location_fn549);;; bin_loop<op_and, uchar, v_uint8>(src1, step1, src2, step2, dst, step, width, height); }

OpenCV源码浅析——MatExpr到Mat是怎么赋值的？

0. HighLevel的函数调用：

1. `getAddTab()`返回的是函数指针数组，为什么它返回的时候我没法设断点？

2. 后续其它函数中，发现调用的是函数指针表中的索引为6的，也就是`cv::hal::add64f`函数。

3. 调用堆栈：为了搞清楚为啥来这里执行，看看call stack：

4. VS不给做静态语法解析了

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OpenCV源码浅析——MatExpr到Mat是怎么赋值的？

0. HighLevel的函数调用：

1. getAddTab()返回的是函数指针数组，为什么它返回的时候我没法设断点？

2. 后续其它函数中，发现调用的是函数指针表中的索引为6的，也就是cv::hal::add64f函数。

3. 调用堆栈：为了搞清楚为啥来这里执行，看看call stack：

4. VS不给做静态语法解析了

相关文章

网友评论

延伸阅读

深度阅读

栏目导航

热点阅读

1. `getAddTab()`返回的是函数指针数组，为什么它返回的时候我没法设断点？

2. 后续其它函数中，发现调用的是函数指针表中的索引为6的，也就是`cv::hal::add64f`函数。