www.pudn.com > h263_.rar > IO.cpp

#include"stdafx.h" 
#include"Global.h" 
 
/********************************************************************** 
 * 
 *	Name:        FillImage 
 *	Description:	fills Y, Cb and Cr of a PictImage struct 
 *	 
 *	Input:        pointer to raw image 
 *         
 *	Returns:	pointer to filled PictImage 
 *	Side effects:	allocates memory to PictImage 
 *                      raw image is freed 
 * 
 *	Date: 940109	Author:	Karl.Lillevold@nta.no 
 * 
 ***********************************************************************/ 
 
PictImage *FillImage(unsigned char *in) 
{ 
  PictImage *Pict; 
 
  Pict = InitImage(pels*lines); 
 
  memcpy(Pict->lum, in, pels*lines); 
  memcpy(Pict->Cb, in + pels*lines, pels*lines/4); 
  memcpy(Pict->Cr, in + pels*lines + pels*lines/4, pels*lines/4); 
 
//  free(in); 
  return(Pict); 
} 
 
 
 
 
/********************************************************************** 
 * 
 *	Name:        InitImage 
 *	Description:	Allocates memory for structure of 4:2:0-image 
 *	 
 *	Input:	        image size 
 *	Returns:	pointer to new structure 
 *	Side effects:	memory allocated to structure 
 * 
 * 
 ***********************************************************************/ 
PictImage *InitImage(int size) 
{ 
  PictImage *newImage; 
 
  if ((newImage = (PictImage *)malloc(sizeof(PictImage))) == NULL) { 
    fprintf(stderr,"Couldn't allocate (PictImage *)\n"); 
    exit(-1); 
  } 
  if ((newImage->lum = (unsigned char *)malloc(sizeof(char)*size)) 
      == NULL) { 
    fprintf(stderr,"Couldn't allocate memory for luminance\n"); 
    exit(-1); 
  } 
  if ((newImage->Cr = (unsigned char *)malloc(sizeof(char)*size/4)) 
      == NULL) { 
    fprintf(stderr,"Couldn't allocate memory for Cr\n"); 
    exit(-1); 
  } 
  if ((newImage->Cb = (unsigned char *)malloc(sizeof(char)*size/4)) 
      == NULL) { 
    fprintf(stderr,"Couldn't allocate memory for Cb\n"); 
    exit(-1); 
  } 
 
  return newImage; 
} 
 
 
/********************************************************************** 
 * 
 *	Name:        FreeImage 
 *	Description:	Frees memory allocated to structure of 4:2:0-image 
 *	 
 *	Input:        pointer to structure 
 *	Returns: 
 *	Side effects:	memory of structure freed 
 * 
 * 
 ***********************************************************************/ 
 
void FreeImage(PictImage *image) 
 
{ 
  free(image->lum); 
  free(image->Cr); 
  free(image->Cb); 
}