www.pudn.com > jm74.zip > nalucommon.c

 
/*! 
 ************************************************************************ 
 * \file  nalucommon.c 
 * 
 * \brief 
 *    Common NALU support functions 
 * 
 * \author 
 *    Main contributors (see contributors.h for copyright, address and affiliation details) 
 *    - Stephan Wenger    
 ************************************************************************ 
 */ 
 
#include  
#include  
#include  
 
#include "global.h" 
#include "nalu.h" 
#include "memalloc.h" 
 
 
/*!  
 ************************************************************************************* 
 * \brief 
 *    Allocates memory for a NALU 
 * 
 * \param buffersize 
 *     size of NALU buffer  
 * 
 * \return 
 *    pointer to a NALU 
 ************************************************************************************* 
 */ 
  
 
NALU_t *AllocNALU(int buffersize) 
{ 
  NALU_t *n; 
 
  if ((n = (NALU_t*)calloc (1, sizeof (NALU_t))) == NULL) no_mem_exit ("AllocNALU: n"); 
 
  n->max_size=buffersize; 
 
  if ((n->buf = (byte*)calloc (buffersize, sizeof (byte))) == NULL) no_mem_exit ("AllocNALU: n->buf"); 
   
  return n; 
} 
 
 
/*!  
 ************************************************************************************* 
 * \brief 
 *    Frees a NALU 
 * 
 * \param n  
 *    NALU to be freed 
 * 
 ************************************************************************************* 
 */ 
 
void FreeNALU(NALU_t *n) 
{ 
  if (n) 
  { 
    if (n->buf) 
    { 
      free(n->buf); 
      n->buf=NULL; 
    } 
    free (n); 
  } 
}