xf_resize_accel_streamlined.cpp

/*
 * Copyright 2019 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 "hls_stream.h"
#include "ap_axi_sdata.h"
#include "ap_int.h"

#include "xf_resize_config.h"

#define DWIDTH 24
const int dwidth_tripcount = WIDTH/NPC_T;
const int height_tripcount = HEIGHT;

extern "C" {
    void resize_accel_streamlined(
                    // ap_uint<INPUT_PTR_WIDTH>* img_inp,
                    // xf::cv::Mat<TYPE, HEIGHT, WIDTH, NPC_T>& img_inp,
                    // hls::stream<xf::cv::Mat<TYPE, HEIGHT, WIDTH, NPC_T>>& img_inp,
                    hls::stream<ap_axiu<DWIDTH, 0, 0, 0>>& img_inp,
                    ap_uint<OUTPUT_PTR_WIDTH>* img_out,
                    int rows_in,
                    int cols_in,
                    int rows_out,
                    int cols_out) {

        // #pragma HLS INTERFACE m_axi     port=img_inp  offset=slave bundle=gmem1
        #pragma HLS INTERFACE m_axi     port=img_out  offset=slave bundle=gmem2
        #pragma HLS INTERFACE s_axilite port=rows_in
        #pragma HLS INTERFACE s_axilite port=cols_in
        #pragma HLS INTERFACE s_axilite port=rows_out
        #pragma HLS INTERFACE s_axilite port=cols_out
        #pragma HLS INTERFACE s_axilite port=return

        xf::cv::Mat<TYPE, HEIGHT, WIDTH, NPC_T> in_mat(rows_in, cols_in);
        xf::cv::Mat<TYPE, NEWHEIGHT, NEWWIDTH, NPC_T> out_mat(rows_out, cols_out);

        #pragma HLS stream variable=in_mat.data depth=2
        #pragma HLS stream variable=out_mat.data depth=2
        #pragma HLS DATAFLOW

        // xf::cv::Array2xfMat<INPUT_PTR_WIDTH, TYPE, HEIGHT, WIDTH, NPC_T>(img_inp, in_mat);

        int readindex = 0, writeindex = 0;
    Row_Loop:
        for (auto row = 0; row < HEIGHT; row++) {
    #pragma HLS LOOP_TRIPCOUNT min=height_tripcount max=height_tripcount
    #pragma HLS LOOP_FLATTEN off
        Col_Loop:
            for (auto col = 0; col < WIDTH; col++) {
    #pragma HLS LOOP_TRIPCOUNT min=dwidth_tripcount max=dwidth_tripcount
    #pragma HLS pipeline
                ap_axiu<DWIDTH, 0, 0, 0> aux;
                aux = img_inp.read();
                in_mat.write(writeindex++, aux.data);
            }
        }

        xf::cv::resize<INTERPOLATION, TYPE, HEIGHT, WIDTH, NEWHEIGHT, NEWWIDTH, NPC_T, MAXDOWNSCALE>(in_mat, out_mat);
        xf::cv::xfMat2Array<OUTPUT_PTR_WIDTH, TYPE, NEWHEIGHT, NEWWIDTH, NPC_T>(out_mat, img_out);
        return;
    }
}