asn1_createListGroup.c

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/*******************************************************************************
 * Copyright © 2014 The DTVKit Open Software Foundation Ltd (www.dtvkit.org)
 * Copyright © 2004 Ocean Blue Software Ltd
 * Copyright © 2000 Koninklijke Philips Electronics N.V
 *
 * This file is part of a DTVKit Software Component
 * You are permitted to copy, modify or distribute this file subject to the terms
 * of the DTVKit 1.0 Licence which can be found in licence.txt or at www.dtvkit.org
 * 
 * THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
 * EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
 * 
 * If you or your organisation is not a member of DTVKit then you have access
 * to this source code outside of the terms of the licence agreement
 * and you are expected to delete this and any associated files immediately.
 * Further information on DTVKit, membership and terms can be found at www.dtvkit.org
 *******************************************************************************/
/*---includes for this file--------------------------------------------------*/
#include <stdio.h>
#include "vpa1_sys.h"
#include "vpa1_tgs.h"
#include "fpa1_syn.h"
#include "asn1_sys.h"

#include "mh5base.h"
#include "mh5listgroup.h"
#include "mh5visible.h"
#include "asn1_createExtras.h"
#include "asn1_createVisible.h"
#include "asn1_createTokenGroup.h"
#include "asn1_createListGroup.h"


/*---constant definitions for this file--------------------------------------*/


/*---local typedef structs for this file-------------------------------------*/

/*---local (static) variable declarations for this file----------------------*/

/*---local function definitions----------------------------------------------*/

/*---global function definitions---------------------------------------------*/

static asnErr asn1_decodePosList(fpa1_syntaxList *listPtr, MHEG5ListGroup *listGroup)
{
   asnErr errVal = 0;
   fpa1_syntaxList *currItem;
   MHEG5Int x, y;

   DPL5((">> asn1_decodePosList(%X,%X)\n", listPtr, listGroup));

   assert(listGroup);
   if (listPtr == NULL)
   {
      DPL5(("<< asn1_decodePosList() Returned early\n"));
      return 1;
   }

   currItem = listPtr->children;

   while (currItem != NULL)
   {
      if (currItem->tag == XY_POSITION_TYPE)
      {
         if ((currItem->children != NULL) && (currItem->children->next != NULL))
         {
            x = currItem->children->data.intData;
            y = currItem->children->next->data.intData;
         }
         else
         {
            /* safe default values */
            x = 0;
            y = 0;
         }
         MHEG5listGroupAddPosition(listGroup, x, y);
      }
      else
      {
         DPL2(("WARNING:[ASN.1] failed to decode a list group original positions list\n"));
         errVal |= 0x01;
      }
      currItem = currItem->next;
   }

#if (DPLEVEL >= 2)
   if (errVal != 0)
   {
      DPL2(("WARNING:[ASN.1] asn1_decodePosList() returns errVal = %d\n", errVal));
   }
#endif /* DPLEVEL >= 2 */

   DPL5(("<< asn1_decodePosList() Returns %d\n", errVal));
   return errVal;
}

MHEG5Ingredient* asn1_createListGroup( fpa1_syntaxList *listPtr )
{
   MHEG5ListGroup *listGroup;
   asnErr errVal = 0;
   fpa1_syntaxList *currItem;
   U32BIT itm_cnt, slt_cnt, size;

   assert( listPtr );

   itm_cnt = asn1_getTokenGroupItemCount( listPtr->children );
   slt_cnt = itm_cnt & 0xffff;
   itm_cnt >>= 16;

   size = sizeof(MHEG5ListGroup) +
      (itm_cnt * sizeof(MHEG5TokenSlot)) +
      (slt_cnt * sizeof(MHEG5ActionList));

   listGroup = (MHEG5ListGroup *)MHEG5getMem( size );
   if (listGroup != NULL)
   {
      /* defaults */
      memset( listGroup, 0, size );
      listGroup->tokenGroup.ingredient.root.clazz = MHEG5LISTGROUP;
      listGroup->tokenGroup.tokens_num = itm_cnt;
      listGroup->tokenGroup.tokens_ptr = (MHEG5TokenSlot *)(listGroup + 1);

      /* searches current set of tags for local tags */
      currItem = listPtr->children;
      while (currItem != NULL)
      {
         /* most objects will have more than one local tag */
         switch (currItem->tag)
         {
            case POSITIONS:
               errVal |= asn1_decodePosList(currItem, listGroup);
               break;
            case WRAP:
               listGroup->wrapAround = (currItem->data.boolData == 0) ? MHEG5FALSE : MHEG5TRUE;
               break;
            case MULTIPLE:
               listGroup->multipleSelection = (currItem->data.boolData == 0) ? MHEG5FALSE : MHEG5TRUE;
               break;
            default:
               break;
         }
         currItem = currItem->next;
      }
      /* decode inherited tags */
      errVal |= asn1_decodeTokenGroup(listPtr, &listGroup->tokenGroup);
      if (errVal != ASN_NO_ERROR)
      {
         #if (DPLEVEL >= 2)
         DPL2(("WARNING:[ASN.1] asn1_decodeListGroup() returns errVal = %d\n", errVal));
         #endif /* DPLEVEL >= 2 */
         MHEG5freeMem( listGroup );
         listGroup = NULL;
      }
   }

   DPL5(("<< asn1_decodeListGroup() Returns %d\n", errVal));
   return (MHEG5Ingredient *)listGroup;
}