writepic.c

来自「《JPEG-MPEG编解码技术》3、4、5章」· C语言 代码 · 共 57 行

/* writepic.c, 恢复重建图像*/



#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include "global.h"

void writeframe(fname,frame)
char *fname;
unsigned char *frame[];
{
  int chrom_hsize, chrom_vsize;
  char name[128];
  FILE *fd;

  chrom_hsize = (chroma_format==CHROMA444) ? horizontal_size
                                           : horizontal_size>>1;

  chrom_vsize = (chroma_format!=CHROMA420) ? vertical_size
                                           : vertical_size>>1;

  if (fname[0]=='-')
    return;

  /* Y */
  sprintf(name,"%s.Y",fname);
  if (!(fd = fopen(name,"wb")))
  {
    sprintf(errortext,"Couldn't create %s\n",name);
    error(errortext);
  }
  fwrite(frame[0],1,horizontal_size*vertical_size,fd);
  fclose(fd);

  /* Cb */
  sprintf(name,"%s.U",fname);
  if (!(fd = fopen(name,"wb")))
  {
    sprintf(errortext,"Couldn't create %s\n",name);
    error(errortext);
  }
  fwrite(frame[1],1,chrom_hsize*chrom_vsize,fd);
  fclose(fd);

  /* Cr */
  sprintf(name,"%s.V",fname);
  if (!(fd = fopen(name,"wb")))
  {
    sprintf(errortext,"Couldn't create %s\n",name);
    error(errortext);
  }
  fwrite(frame[2],1,chrom_hsize*chrom_vsize,fd);
  fclose(fd);
}