.. _program_listing_file__tmp_ws_src_vitis_common_include_aie_imgproc_xf_threshold_aie.hpp:

Program Listing for File xf_threshold_aie.hpp
=============================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_vitis_common_include_aie_imgproc_xf_threshold_aie.hpp>` (``/tmp/ws/src/vitis_common/include/aie/imgproc/xf_threshold_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_THRESHOLD_H_
   #define _AIE_THRESHOLD_H_
   
   namespace xf {
   namespace cv {
   namespace aie {
   
   template <typename T, int N>
   __attribute__((noinline)) void threshold(
       T* img_in, T* img_out, const T& img_width, const T& img_height, const T& thresh_val, const T& max_val) {
       ::aie::vector<T, N> constants;
       ::aie::vector<T, N> data_out;
       ::aie::mask<N> temp_val;
       constants[0] = 0;          // updating constant zero_val value
       constants[1] = thresh_val; // updating constant threshold value
       constants[2] = max_val;    // updating constant max_val value
   
       for (int j = 0; j < (img_height * img_width); j += N) // 16x samples per loop
           chess_prepare_for_pipelining chess_loop_range(14, ) {
               ::aie::vector<T, N> data_buf1 = ::aie::load_v(img_in); // in:00++15|_________|_________|_________
               img_in += N;
               switch (THRESH_TYPE) {
                   case XF_THRESHOLD_TYPE_TRUNC:
                       data_out = ::aie::min(constants[1], data_buf1);
                       break;
                   case XF_THRESHOLD_TYPE_BINARY:
                       temp_val = ::aie::lt(constants[1], data_buf1);
                       data_out = ::aie::select(constants[0], constants[2], temp_val);
                       break;
                   case XF_THRESHOLD_TYPE_BINARY_INV:
                       temp_val = ::aie::lt(constants[1], data_buf1);
                       data_out = ::aie::select(constants[2], constants[0], temp_val);
                       break;
                   case XF_THRESHOLD_TYPE_TOZERO:
                       temp_val = ::aie::lt(constants[1], data_buf1);
                       data_out = ::aie::select(constants[0], data_buf1, temp_val);
                       break;
                   case XF_THRESHOLD_TYPE_TOZERO_INV:
                       temp_val = ::aie::lt(constants[1], data_buf1);
                       data_out = ::aie::select(data_buf1, constants[0], temp_val);
                       break;
   
                   default:
                       data_out = ::aie::min(constants[1], data_buf1);
               }
               ::aie::store_v(img_out, data_out);
               img_out += N;
           }
   }
   
   __attribute__((noinline)) void threshold_api(input_window_int16* restrict img_in,
                                                output_window_int16* restrict img_out,
                                                const int16& thresh_val,
                                                const int16& max_val) {
       int16_t* img_in_ptr = (int16_t*)img_in->ptr;
       int16_t* img_out_ptr = (int16_t*)img_out->ptr;
   
       const int16_t image_width = xfcvGetTileWidth(img_in_ptr);
       const int16_t image_height = xfcvGetTileHeight(img_in_ptr);
   
       xfcvCopyMetaData(img_in_ptr, img_out_ptr);
   
       int16_t* restrict ptr_in = xfcvGetImgDataPtr(img_in_ptr);
       int16_t* restrict ptr_out = xfcvGetImgDataPtr(img_out_ptr);
   
       threshold<int16_t, 32>(ptr_in, ptr_out, image_width, image_height, thresh_val, max_val);
   }
   
   } // aie
   } // cv
   } // xf
   
   #endif