154 lines
4.5 KiB
C++
154 lines
4.5 KiB
C++
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/*----------------------------------------------------------------------------
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* File: RTCPINIT.C
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* Product: RTP/RTCP implementation
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* Description: Provides RTCP initialization functions.
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*
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* INTEL Corporation Proprietary Information
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* This listing is supplied under the terms of a license agreement with
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* Intel Corporation and may not be copied nor disclosed except in
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* accordance with the terms of that agreement.
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* Copyright (c) 1995 Intel Corporation.
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*--------------------------------------------------------------------------*/
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#include "rrcm.h"
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/*---------------------------------------------------------------------------
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/ Global Variables
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/--------------------------------------------------------------------------*/
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PRTCP_CONTEXT pRTCPContext = NULL;
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/*---------------------------------------------------------------------------
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/ External Variables
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/--------------------------------------------------------------------------*/
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extern PRTP_CONTEXT pRTPContext;
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/*----------------------------------------------------------------------------
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* Function : initRTCP
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* Description: RTCP initialization procedures. Creates the initial RTCP
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* session and allocates all initial memory resources.
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*
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* Input : None.
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*
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* Return: OK: RRCM_NoError
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* !0: Error code (see RRCM.H)
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---------------------------------------------------------------------------*/
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DWORD initRTCP (void)
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{
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DWORD dwStatus = RRCM_NoError;
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IN_OUT_STR ("RTCP: Enter initRTCP()\n");
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// If RTCP has already been initialized, exit and report the error
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if (pRTCPContext != NULL)
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{
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RRCM_DBG_MSG ("RTCP: ERROR - Multiple RTCP Instances", 0,
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__FILE__, __LINE__, DBG_CRITICAL);
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IN_OUT_STR ("RTCP: Exit initRTCP()\n");
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return (RRCMError_RTCPReInit);
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}
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// Obtain RTCP context
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pRTCPContext = (PRTCP_CONTEXT)GlobalAlloc (GMEM_FIXED | GMEM_ZEROINIT,
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sizeof(RTCP_CONTEXT));
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if (pRTCPContext == NULL)
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{
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RRCM_DBG_MSG ("RTCP: ERROR - Resource allocation failed", 0,
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__FILE__, __LINE__, DBG_CRITICAL);
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IN_OUT_STR ("RTCP: Exit initRTCP()\n");
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return RRCMError_RTCPResources;
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}
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// initialize the context critical section
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InitializeCriticalSection(&pRTCPContext->critSect);
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// Initialize number of desired free cells
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pRTCPContext->dwInitNumFreeRRCMStat = pRTPContext->registry.NumFreeSSRC;
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// allocate heaps
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dwStatus = allocateRTCPContextHeaps (pRTCPContext);
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if (dwStatus == RRCM_NoError)
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{
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// allocate free list of SSRCs statistic entries
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dwStatus = allocateLinkedList (&pRTCPContext->RRCMFreeStat,
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pRTCPContext->hHeapRRCMStat,
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&pRTCPContext->dwInitNumFreeRRCMStat,
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sizeof(SSRC_ENTRY),
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&pRTCPContext->critSect);
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}
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// initialize the pseudo-random number generator, for later MD5 use
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RRCMsrand ((unsigned int)timeGetTime());
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// If initialation failed return all resourses allocated
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if (dwStatus != RRCM_NoError)
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deleteRTCP ();
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IN_OUT_STR ("RTCP: Exit initRTCP()\n");
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return (dwStatus);
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}
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/*----------------------------------------------------------------------------
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* Function : deleteRTCP
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* Description: RTCP delete procedures. All RTCP sessions have been deleted
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* at this point, so just delete what's needed.
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*
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* Input : None.
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*
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* Return: FALSE : OK.
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* TRUE : Error code. RTCP couldn't be initialized.
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---------------------------------------------------------------------------*/
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DWORD deleteRTCP (void)
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{
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IN_OUT_STR ("RTCP: Enter deleteRTCP()\n");
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ASSERT (pRTCPContext);
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// protect everything from the top
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EnterCriticalSection (&pRTCPContext->critSect);
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// delete all heaps
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if (pRTCPContext->hHeapRRCMStat)
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{
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if (HeapDestroy (pRTCPContext->hHeapRRCMStat) == FALSE)
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{
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RRCM_DBG_MSG ("RTCP: ERROR - HeapDestroy", GetLastError(),
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__FILE__, __LINE__, DBG_ERROR);
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}
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}
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if (pRTCPContext->hHeapRTCPSes)
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{
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if (HeapDestroy (pRTCPContext->hHeapRTCPSes) == FALSE)
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{
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RRCM_DBG_MSG ("RTCP: ERROR - HeapDestroy", GetLastError(),
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__FILE__, __LINE__, DBG_ERROR);
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}
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}
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// protect everything from the top
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LeaveCriticalSection (&pRTCPContext->critSect);
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DeleteCriticalSection (&pRTCPContext->critSect);
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// Clean up our context resources
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GlobalFree (pRTCPContext);
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IN_OUT_STR ("RTCP: Exit deleteRTCP()\n");
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return (TRUE);
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}
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// [EOF]
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