parsetcommon.c

包含了从MPEG4的视频解码到H.264的视频编码部分的源代码

/*
***********************************************************************
* COPYRIGHT AND WARRANTY INFORMATION
*
* Copyright 2001, International Telecommunications Union, Geneva
*
* DISCLAIMER OF WARRANTY
*
* These software programs are available to the user without any
* license fee or royalty on an "as is" basis. The ITU disclaims
* any and all warranties, whether express, implied, or
* statutory, including any implied warranties of merchantability
* or of fitness for a particular purpose.  In no event shall the
* contributor or the ITU be liable for any incidental, punitive, or
* consequential damages of any kind whatsoever arising from the
* use of these programs.
*
* This disclaimer of warranty extends to the user of these programs
* and user's customers, employees, agents, transferees, successors,
* and assigns.
*
* The ITU does not represent or warrant that the programs furnished
* hereunder are free of infringement of any third-party patents.
* Commercial implementations of ITU-T Recommendations, including
* shareware, may be subject to royalty fees to patent holders.
* Information regarding the ITU-T patent policy is available from
* the ITU Web site at http://www.itu.int.
*
* THIS IS NOT A GRANT OF PATENT RIGHTS - SEE THE ITU-T PATENT POLICY.
************************************************************************
*/

/*!
 **************************************************************************************
 * \file
 *    parset.c
 * \brief
 *    Picture and Sequence Parameter set generation and handling
 *  \date 25 November 2002
 * \author
 *    Main contributors (see contributors.h for copyright, address and affiliation details) 
 *      - Stephan Wenger        <[e-mail]>
 *
 **************************************************************************************
 */
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <memory.h>

#include "parsetcommon.h"
#include "memalloc.h"
/*! 
 *************************************************************************************
 * \brief
 *    Allocates memory for a pps
 *
 * \param none
 *
 * \return
 *    pointer to a pps
 *************************************************************************************
 */
 
pic_parameter_set_rbsp_t *AllocPPS ()
 {
   pic_parameter_set_rbsp_t *p;

   if ((p=calloc (sizeof (pic_parameter_set_rbsp_t), 1)) == NULL)
     no_mem_exit ("AllocPPS: PPS");
   if ((p->slice_group_id = calloc (SIZEslice_group_id, 1)) == NULL)
     no_mem_exit ("AllocPPS: slice_group_id");
   return p;
 }

 
/*! 
 *************************************************************************************
 * \brief
 *    Allocates memory for am sps
 *
 * \param none
 *
 * \return
 *    pointer to a sps
 *************************************************************************************
 */
 
seq_parameter_set_rbsp_t *AllocSPS ()
 {
   seq_parameter_set_rbsp_t *p;

   if ((p=calloc (sizeof (seq_parameter_set_rbsp_t), 1)) == NULL)
     no_mem_exit ("AllocSPS: SPS");
   return p;
 }

 
/*! 
 *************************************************************************************
 * \brief
 *    Frees a pps
 *
 * \param pps to be freed
 *
 * \return
 *    none
 *************************************************************************************
 */
 
 void FreePPS (pic_parameter_set_rbsp_t *pps)
 {
   assert (pps != NULL);
   if (pps->slice_group_id != NULL) free (pps->slice_group_id);
   free (pps);
 }

 
 /*! 
 *************************************************************************************
 * \brief
 *    Frees a sps
 *
 * \param sps to be freed
 *
 * \return
 *    none
 *************************************************************************************
 */
 
 void FreeSPS (seq_parameter_set_rbsp_t *sps)
 {
   assert (sps != NULL);
   free (sps); 
 }