The ioAssociateCodec routine shown in the following example calls the ioInitCodecopen routine to allocate memory. The next example illustrates how the ioInitCodecopen routine allocates memory and initializes a CODECOPEN structure to be saved in the CODEC control block (CCB).

LONG ioInitCodecopen ( PCCB pccb,
                       PCODECOPEN pcodecopen)

{
   ULONG             ulSize;


   ENTERCRITX;
   pccb->codecopen.ulFlags = pcodecopen->ulFlags;

   /* Create and copy Pointers to structures in CODECOPEN structure */
   if (pcodecopen->pControlHdr) {
     ulSize = *((PULONG)pcodecopen->pControlHdr);
     if (!(pccb->codecopen.pControlHdr = (PVOID)HhpAllocMem(hheap,ulSize)))
        {
         return(MMIO_ERROR);
         }
      memcpy(pccb->codecopen.pControlHdr, pcodecopen->pControlHdr, ulSize);
      }

   if (pcodecopen->pSrcHdr) {
      ulSize = *((PULONG)pcodecopen->pSrcHdr);
      if (!(pccb->codecopen.pSrcHdr = (PVOID)HhpAllocMem(hheap,ulSize)))
         {
         return(MMIO_ERROR);
         }
      memcpy(pccb->codecopen.pSrcHdr, pcodecopen->pSrcHdr, ulSize);
      }

   if (pcodecopen->pDstHdr) {
      ulSize = *((PULONG)pcodecopen->pDstHdr);
      if (!(pccb->codecopen.pDstHdr = (PVOID)HhpAllocMem(hheap,ulSize)))
         {
         return(MMIO_ERROR);
         }
      memcpy(pccb->codecopen.pDstHdr, pcodecopen->pDstHdr, ulSize);
      }

   if (pcodecopen->pOtherInfo) {
      ulSize = *((PULONG)pcodecopen->pOtherInfo);
      if (!(pccb->codecopen.pOtherInfo = (PVOID)HhpAllocMem(hheap,ulSize)))
      {
         return(MMIO_ERROR);
         }
      memcpy(pccb->codecopen.pOtherInfo, pcodecopen->pOtherInfo, ulSize);
      }

   EXITCRIT;
   return(MMIO_SUCCESS);
}