.. _program_listing_file__tmp_ws_src_vitis_common_include_aie_imgproc_xf_absdiff_aie.hpp:

Program Listing for File xf_absdiff_aie.hpp
===========================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_vitis_common_include_aie_imgproc_xf_absdiff_aie.hpp>` (``/tmp/ws/src/vitis_common/include/aie/imgproc/xf_absdiff_aie.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   /*
    * Copyright 2021 Xilinx, Inc.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
    *
    * Unless required by applicable law or agreed to in writing, software
    * distributed under the License is distributed on an "AS IS" BASIS,
    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    * See the License for the specific language governing permissions and
    * limitations under the License.
    */
   
   #include <adf.h>
   #include <aie_api/aie.hpp>
   #include <common/xf_aie_utils.hpp>
   
   #ifndef _AIE_ABSDIFF_H_
   #define _AIE_ABSDIFF_H_
   
   #define PARALLEL_FACTOR_16b 32
   
   namespace xf {
   namespace cv {
   namespace aie {
   
   template <typename T, int N>
   __attribute__((noinline)) void absdiff(
       const T* restrict img_in1, const T* restrict img_in2, T* restrict img_out, int image_width, int image_height) {
       auto it1 = ::aie::begin_vector<N>(img_in1);
       auto it2 = ::aie::begin_vector<N>(img_in2);
       auto out = ::aie::begin_vector<N>(img_out);
   
       while (it1 != img_in1 + image_height * image_width) // 32x samples per loop
           chess_prepare_for_pipelining chess_loop_range(14, ) { *out++ = ::aie::abs(::aie::sub(*it1++, *it2++)); }
   }
   
   void absdiff_api(input_window_int16* img_in1, input_window_int16* img_in2, output_window_int16* img_out) {
       int16* restrict img_in_ptr = (int16*)img_in1->ptr;
       int16* restrict img_in_ptr1 = (int16*)img_in2->ptr;
       int16* restrict img_out_ptr = (int16*)img_out->ptr;
   
       const int16_t img_width = xfcvGetTileWidth(img_in_ptr);
       const int16_t img_height = xfcvGetTileHeight(img_in_ptr);
   
       xfcvCopyMetaData(img_in_ptr, img_out_ptr);
       xfcvUnsignedSaturation(img_out_ptr);
   
       int16_t* restrict ptr0 = xfcvGetImgDataPtr(img_in_ptr);
       int16_t* restrict ptr1 = xfcvGetImgDataPtr(img_in_ptr1);
       int16_t* restrict ptr_out = xfcvGetImgDataPtr(img_out_ptr);
   
       absdiff<int16_t, PARALLEL_FACTOR_16b>(ptr0, ptr1, ptr_out, img_width, img_height);
   }
   
   } // aie
   } // cv
   } // xf
   #endif