Merge pull request opencv#26459 from savuor:rv/hal_absdiff_scalar

HAL added for absdiff(array, scalar) + related fixes opencv#26459

### This PR changes
* HAL for `absdiff` when one of arguments is a scalar, including multichannel arrays and scalars
* several channels support for HAL `addScalar`
* proper data type check for `addScalar` when one of arguments is a scalar

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [x] The feature is well documented and sample code can be built with the project CMake

Author: savuor

modules/core/src/arithm.cpp

@@ -587,7 +587,7 @@ static bool ocl_arithm_op(InputArray _src1, InputArray _src2, OutputArray _dst,
 
 typedef int (*ScalarFunc)(const uchar* src, size_t step_src,
                           uchar* dst, size_t step_dst, int width, int height,
-                          void* scalar, bool scalarIsFirst);
+                          void* scalar, bool scalarIsFirst, int nChannels);
 
 typedef int (*ExtendedTypeFunc)(const uchar* src1, size_t step1,
                                 const uchar* src2, size_t step2,
@@ -862,7 +862,6 @@ static void arithm_op(InputArray _src1, InputArray _src2, OutputArray _dst,
             for( size_t j = 0; j < total; j += blocksize )
             {
                 int bsz = (int)MIN(total - j, blocksize);
-                Size bszn(bsz*cn, 1);
                 const uchar *sptr1 = ptrs[0];
                 const uchar* sptr2 = buf2;
                 uchar* dptr = ptrs[1];
@@ -875,30 +874,30 @@ static void arithm_op(InputArray _src1, InputArray _src2, OutputArray _dst,
                 // try to perform operation in 1 call, fallback to classic way if fail
                 uchar* opconverted = haveMask ? maskbuf : dptr;
                 if (!scalarFunc || src2.total() != 1 ||
-                    scalarFunc(extSptr1, 1, opconverted, 1, bszn.width, bszn.height, (void*)extSptr2, swapped12) != 0)
+                    scalarFunc(extSptr1, 1, opconverted, 1, bsz, 1, (void*)extSptr2, swapped12, cn) != 0)
                 {
                     // try to perform operation with conversion in one call
                     // if fail, use converter functions
 
                     if (!extendedFunc || extendedFunc(extSptr1, 1, extSptr2, 1, opconverted, 1,
-                                                    bszn.width, bszn.height, usrdata) != 0)
+                                                      bsz*cn, 1, usrdata) != 0)
                     {
                         if( cvtsrc1 )
                         {
-                            cvtsrc1( sptr1, 1, 0, 1, buf1, 1, bszn, 0 );
+                            cvtsrc1( sptr1, 1, 0, 1, buf1, 1, Size(bsz*cn, 1), 0 );
                             sptr1 = buf1;
                         }
 
                         if( swapped12 )
                             std::swap(sptr1, sptr2);
 
                         uchar* fdst = ( haveMask || cvtdst ) ? wbuf : dptr;
-                        func( sptr1, 1, sptr2, 1, fdst, 1, bszn.width, bszn.height, usrdata );
+                        func( sptr1, 1, sptr2, 1, fdst, 1, bsz*cn, 1, usrdata );
 
                         if (cvtdst)
                         {
                             uchar* cdst = haveMask ? maskbuf : dptr;
-                            cvtdst(wbuf, 1, 0, 1, cdst, 1, bszn, 0);
+                            cvtdst(wbuf, 1, 0, 1, cdst, 1, Size(bsz*cn, 1), 0);
                         }
                         opconverted = cvtdst ? maskbuf : wbuf;
                     }
@@ -931,9 +930,9 @@ static BinaryFuncC* getAddTab()
 }
 
 static int addScalar32f32fWrapper(const uchar* src, size_t step_src, uchar* dst, size_t step_dst, int width, int height,
-                                  void* scalar, bool /*scalarIsFirst*/)
+                                  void* scalar, bool /*scalarIsFirst*/, int nChannels)
 {
-    int res = cv_hal_addScalar32f32f((const float*)src, step_src, (float *)dst, step_dst, width, height, (const float*)scalar);
+    int res = cv_hal_addScalar32f32f((const float*)src, step_src, (float *)dst, step_dst, width, height, (const float*)scalar, nChannels);
     if (res == CV_HAL_ERROR_OK || res == CV_HAL_ERROR_NOT_IMPLEMENTED)
         return res;
     else
@@ -944,9 +943,9 @@ static int addScalar32f32fWrapper(const uchar* src, size_t step_src, uchar* dst,
 }
 
 static int addScalar16s16sWrapper(const uchar* src, size_t step_src, uchar* dst, size_t step_dst, int width, int height,
-                                  void* scalar, bool /*scalarIsFirst*/)
+                                  void* scalar, bool /*scalarIsFirst*/, int nChannels)
 {
-    int res = cv_hal_addScalar16s16s((const int16_t*)src, step_src, (int16_t *)dst, step_dst, width, height, (const int16_t*)scalar);
+    int res = cv_hal_addScalar16s16s((const int16_t*)src, step_src, (int16_t *)dst, step_dst, width, height, (const int16_t*)scalar, nChannels);
     if (res == CV_HAL_ERROR_OK || res == CV_HAL_ERROR_NOT_IMPLEMENTED)
         return res;
     else
@@ -1042,6 +1041,67 @@ static BinaryFuncC* getAbsDiffTab()
     return absDiffTab;
 }
 
+
+static int absDiffScalar32f32fWrapper(const uchar* src, size_t step_src, uchar* dst, size_t step_dst, int width, int height,
+                                      void* scalar, bool /*scalarIsFirst*/, int nChannels)
+{
+    int res = cv_hal_absDiffScalar32f32f((const float*)src, step_src, (float *)dst, step_dst, width, height, (const float*)scalar, nChannels);
+    if (res == CV_HAL_ERROR_OK || res == CV_HAL_ERROR_NOT_IMPLEMENTED)
+        return res;
+    else
+    {
+        CV_Error_(cv::Error::StsInternal, ("HAL implementation addScalar32f32f ==> " CVAUX_STR(cv_hal_addScalar32f32f)
+                                           " returned %d (0x%08x)", res, res));
+    }
+}
+
+static int absDiffScalar32s32uWrapper(const uchar* src, size_t step_src, uchar* dst, size_t step_dst, int width, int height,
+                                      void* scalar, bool /*scalarIsFirst*/, int nChannels)
+{
+    int res = cv_hal_absDiffScalar32s32u((const int*)src, step_src, (uint32_t*)dst, step_dst, width, height, (const int*)scalar, nChannels);
+    if (res == CV_HAL_ERROR_OK || res == CV_HAL_ERROR_NOT_IMPLEMENTED)
+        return res;
+    else
+    {
+        CV_Error_(cv::Error::StsInternal, ("HAL implementation addScalar32f32f ==> " CVAUX_STR(cv_hal_addScalar32f32f)
+                                           " returned %d (0x%08x)", res, res));
+    }
+}
+
+static int absDiffScalar8u8uWrapper(const uchar* src, size_t step_src, uchar* dst, size_t step_dst, int width, int height,
+                                      void* scalar, bool /*scalarIsFirst*/, int nChannels)
+{
+    int res = cv_hal_absDiffScalar8u8u((const uchar*)src, step_src, (uchar*)dst, step_dst, width, height, (const uchar*)scalar, nChannels);
+    if (res == CV_HAL_ERROR_OK || res == CV_HAL_ERROR_NOT_IMPLEMENTED)
+        return res;
+    else
+    {
+        CV_Error_(cv::Error::StsInternal, ("HAL implementation addScalar32f32f ==> " CVAUX_STR(cv_hal_addScalar32f32f)
+                                           " returned %d (0x%08x)", res, res));
+    }
+}
+
+static ScalarFunc getAbsDiffScalarFunc(int srcType, int dstType)
+{
+    if (srcType == CV_32F && dstType == CV_32F)
+    {
+        return absDiffScalar32f32fWrapper;
+    }
+    // resulting type is 32U in fact
+    else if (srcType == CV_32S && dstType == CV_32S)
+    {
+        return absDiffScalar32s32uWrapper;
+    }
+    else if (srcType == CV_8U && dstType == CV_8U)
+    {
+        return absDiffScalar8u8uWrapper;
+    }
+    else
+    {
+        return nullptr;
+    }
+}
+
 }
 
 void cv::add( InputArray src1, InputArray src2, OutputArray dst,
@@ -1056,7 +1116,17 @@ void cv::add( InputArray src1, InputArray src2, OutputArray dst,
         return;
     }
 
-    ScalarFunc scalarFunc = getAddScalarFunc(src1.depth(), dtype < 0 ? dst.depth() : dtype);
+    int sdepth = src1.depth();
+    if (checkScalar(src1, src1.type(), src1.kind(), _InputArray::MATX))
+    {
+        sdepth = src2.depth();
+    }
+    if (checkScalar(src2, src2.type(), src2.kind(), _InputArray::MATX))
+    {
+        sdepth = src1.depth();
+    }
+
+    ScalarFunc scalarFunc = getAddScalarFunc(sdepth, dtype < 0 ? dst.depth() : dtype);
     arithm_op(src1, src2, dst, mask, dtype, getAddTab(), false, 0, OCL_OP_ADD, nullptr,
               /* scalarFunc */ scalarFunc );
 }
@@ -1089,7 +1159,18 @@ void cv::absdiff( InputArray src1, InputArray src2, OutputArray dst )
         return;
     }
 
-    arithm_op(src1, src2, dst, noArray(), -1, getAbsDiffTab(), false, 0, OCL_OP_ABSDIFF);
+    int sdepth = src1.depth();
+    if (checkScalar(src1, src1.type(), src1.kind(), _InputArray::MATX))
+    {
+        sdepth = src2.depth();
+    }
+    if (checkScalar(src2, src2.type(), src2.kind(), _InputArray::MATX))
+    {
+        sdepth = src1.depth();
+    }
+    ScalarFunc scalarFunc = getAbsDiffScalarFunc(sdepth, dst.depth());
+    arithm_op(src1, src2, dst, noArray(), -1, getAbsDiffTab(), false, 0, OCL_OP_ABSDIFF,
+              /* extendedFunc */ nullptr, scalarFunc);
 }
 
 void cv::copyTo(InputArray _src, OutputArray _dst, InputArray _mask)

modules/core/src/hal_replacement.hpp

@@ -109,9 +109,10 @@ Add scalar: _dst[i] = src[i] + scalar
 @param width width of the images
 @param height height of the images
 @param scalar_data pointer to scalar value
+@param nChannels number of channels per element
 */
-inline int hal_ni_addScalar32f32f(const float *src_data, size_t src_step, float *dst_data, size_t dst_step, int width, int height, const float* scalar_data) { return CV_HAL_ERROR_NOT_IMPLEMENTED; }
-inline int hal_ni_addScalar16s16s(const int16_t *src_data, size_t src_step, int16_t *dst_data, size_t dst_step, int width, int height, const int16_t* scalar_data) { return CV_HAL_ERROR_NOT_IMPLEMENTED; }
+inline int hal_ni_addScalar32f32f(const float*   src_data, size_t src_step, float*   dst_data, size_t dst_step, int width, int height, const float*   scalar_data, int nChannels) { return CV_HAL_ERROR_NOT_IMPLEMENTED; }
+inline int hal_ni_addScalar16s16s(const int16_t* src_data, size_t src_step, int16_t* dst_data, size_t dst_step, int width, int height, const int16_t* scalar_data, int nChannels) { return CV_HAL_ERROR_NOT_IMPLEMENTED; }
 //! @}
 
 /**
@@ -165,6 +166,23 @@ inline int hal_ni_absdiff16s(const short *src1_data, size_t src1_step, const sho
 inline int hal_ni_absdiff32s(const int *src1_data, size_t src1_step, const int *src2_data, size_t src2_step, int *dst_data, size_t dst_step, int width, int height) { return CV_HAL_ERROR_NOT_IMPLEMENTED; }
 inline int hal_ni_absdiff32f(const float *src1_data, size_t src1_step, const float *src2_data, size_t src2_step, float *dst_data, size_t dst_step, int width, int height) { return CV_HAL_ERROR_NOT_IMPLEMENTED; }
 inline int hal_ni_absdiff64f(const double *src1_data, size_t src1_step, const double *src2_data, size_t src2_step, double *dst_data, size_t dst_step, int width, int height) { return CV_HAL_ERROR_NOT_IMPLEMENTED; }
+
+/*
+Absolute difference with scalar: _dst[i] = | src[i] - scalar |_
+
+@param src_data source image data
+@param src_step source image step
+@param dst_data destination image data
+@param dst_step destination image step
+@param width width of the images
+@param height height of the images
+@param scalar_data pointer to scalar value
+@param nChannels number of channels per element
+*/
+inline int hal_ni_absDiffScalar32f32f(const float* src_data, size_t src_step, float*    dst_data, size_t dst_step, int width, int height, const float* scalar_data, int nChannels) { return CV_HAL_ERROR_NOT_IMPLEMENTED; }
+inline int hal_ni_absDiffScalar32s32u(const int*   src_data, size_t src_step, uint32_t* dst_data, size_t dst_step, int width, int height, const int*   scalar_data, int nChannels) { return CV_HAL_ERROR_NOT_IMPLEMENTED; }
+inline int hal_ni_absDiffScalar8u8u  (const uchar* src_data, size_t src_step, uchar*    dst_data, size_t dst_step, int width, int height, const uchar* scalar_data, int nChannels) { return CV_HAL_ERROR_NOT_IMPLEMENTED; }
+
 //! @}
 
 /**
@@ -229,6 +247,9 @@ inline int hal_ni_not8u(const uchar *src_data, size_t src_step, uchar *dst_data,
 #define cv_hal_absdiff32s hal_ni_absdiff32s
 #define cv_hal_absdiff32f hal_ni_absdiff32f
 #define cv_hal_absdiff64f hal_ni_absdiff64f
+#define cv_hal_absDiffScalar32f32f hal_ni_absDiffScalar32f32f
+#define cv_hal_absDiffScalar32s32u hal_ni_absDiffScalar32s32u
+#define cv_hal_absDiffScalar8u8u   hal_ni_absDiffScalar8u8u
 #define cv_hal_and8u hal_ni_and8u
 #define cv_hal_or8u hal_ni_or8u
 #define cv_hal_xor8u hal_ni_xor8u