asn1_createAudio.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 "mh5audio.h"
#include "asn1_createExtras.h"
#include "asn1_createIngredient.h"
#include "asn1_createAudio.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---------------------------------------------*/

MHEG5Ingredient* asn1_createAudio(fpa1_syntaxList *listPtr, MHEG5Stream *stream )
{
   MHEG5Audio *audio;
   fpa1_syntaxList *currItem;

   DPL5((">> asn1_createAudio(%X,%X)\n", listPtr, audio));

   assert(listPtr);

   audio = (MHEG5Audio *)MHEG5getMem( sizeof(MHEG5Audio));
   if (audio)
   {
      /* defaults */
      memset(audio, 0, sizeof(MHEG5Audio));
      audio->ingredient.root.clazz = MHEG5AUDIO;
      /* audio->originalVolume = 0; */

      /* parent points to the MHEG5Stream object containing the MHGE5Audio */
      audio->parent = stream;

      /* 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 COMPTAG:
               audio->componentTag = currItem->data.intData;
               break;
            case OVOLUME:
               audio->originalVolume = currItem->data.intData;
               break;
            default:
               break;
         }
         currItem = currItem->next;
      }
      /* decode inherited tags */
      if (asn1_decodeIngredient(listPtr, &audio->ingredient) != ASN_NO_ERROR)
      {
         #if (DPLEVEL >= 2)
         DPL2(("WARNING:[ASN.1] asn1_createAudio() Fails\n"));
         #endif /* DPLEVEL >= 2 */
         MHEG5freeMem(audio);
         audio = NULL;
      }
   }

   DPL5(("<< asn1_createAudio() %X\n", audio));
   return (MHEG5Ingredient *)audio;
}