main.c

这是一个JPEG编码源代码

#include <stdio.h>

#include "jinclude.h"
#include "jcapi.h"

int main() {
  /*  compress_test();*/
  int width, height;
  jpeg_compress_info *cinfo;
  FILE *src = fopen("test.bmp", "rb");
  JSAMPLE *image;
  if (!src) {
    exit(1);
  }
  
 
  
  
  image = (JSAMPLE *)jutl_read_bitmap(src, &width, &height);
  
  cinfo = jpeg_create_compress();
  if (!cinfo) {
    printf("error in create cinfo, malloc faild!\n");
  }
  cinfo->image_width = width;
  cinfo->image_height= height;
  cinfo->output = fopen("test.jpg", "wb");
  jpeg_set_default(cinfo);  
  
  jpeg_start_compress(cinfo);
  while (cinfo->next_line < cinfo->image_height) {
    /*printf("%d\n", i/240/3);*/
    jpeg_write_scanline(cinfo, &image[cinfo->next_line*cinfo->image_width*3]);
  }
  jpeg_finish_compress(cinfo);
  fclose(cinfo->output);
  
  jpeg_destory_compress(cinfo);

  free(image);
  fclose(src);
}