func: static inline void hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth,
  
                                    const uint8_t *src, int srcW, int xInc)
  
  {
  
      int i;
  
      unsigned int xpos=0;
  
      for (i=0;i<dstWidth;i++) {
  
          register unsigned int xx=xpos>>16;
  
          register unsigned int xalpha=(xpos&0xFFFF)>>9;
  
          dst[i]= (src[xx]<<7) + (src[xx+1] - src[xx])*xalpha;
  
          xpos+=xInc;
  
      }
  
  
  
  }