学步园

system verilog代码

`define PIC_W 176 //图像宽
`define PIC_H 144 //图像高
`define FRAME 300 //总帧数
`define H_CLK 5   //半周期

typedef byte unsigned ubyte_t;

//读取一帧图像，num表示第几帧，读取的像素存放在数组frame中
import "DPI-C" function int  read_yuv(inout ubyte_t frame[][], input int num);

program automatic RD_YUV
  int i_frame = 0; //表示读第几帧，从第0帧开始计
  ubyte_t frame[`PIC_H][`PIC_W]; //存放像素的数组
  initial begin
    bit clk;
    //读取参考帧
    a1: assert(read_yuv(frame, i_frame) == 1)
    else $error("read frame failed!");
    fork
      forever #`H_CLK clk = !clk;
      forever @(posedge clk) begin
        //处理
        #100 ++i_frame;
        //处理
        a2: assert(read_yuv(frame, i_frame) == 1)
        else $error("read frame failed!");
      end
    join_none
  end
endprogram

c语言代码，只读取了亮度，色度没有读

#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <string.h>
#include <svdpi.h>

#define PIC_P     "F:\\sequence\\yuv\\foreman_qcif.yuv"//图像路径

int read_yuv(const svOpenArrayHandle pix_array, const int i_frame)
{
	int width, height;
	uint8_t *addr;
	FILE *fp;
	width  = svSize(pix_array, 2); //获取图像宽
	height = svSize(pix_array, 1); //获取图像高
	addr   = (uint8_t *)svGetArrayPtr(pix_array);

	//打开文件
	fp = fopen(PIC_P, "rb");
	if (!fp)
		return 0;
	//找到一帧的开头
	if( fseek( fp, (uint64_t)(i_frame) * width * height * 3 / 2, SEEK_SET ) )
		return 0; 
	//读取Y分量至内存
	if( fread( addr, 1, width * height, fp ) <= 0 )
		return 0;
    fclose(fp);
	return 1;
}