smlparse.cpp

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

		// /See if above replaces this code; if no assert reported by
		// 2001-05-20, then I'm going to remove this whole if() block:
		HX_ASSERT(0  &&  "mailto: [e-mail]");
		goto cleanup; //Don't insert this because it can't ever play.
	    }
	    // /Also, need to check parent *dur* and make sure we don't
	    // exceed it if it's been explicitly set to a finite amount:
	    if ( pNode->m_pParent  &&  pNode->m_pParent->m_pElement  &&
		    pNode->m_pElement->m_bBeginOffsetSet  &&
		    pNode->m_pParent->m_pElement->m_bHasExplicitDur  &&
		    !pNode->m_pParent->m_pElement->m_bIndefiniteDuration  &&
		    (pNode->m_pElement->m_lBeginOffset > 0  &&
		    (UINT32)pNode->m_pElement->m_lBeginOffset >
		    pNode->m_pParent->m_pElement->m_ulDuration) )
	    {
		// /See if above replaces this code; if no assert reported by
		// 2001-05-20, then I'm going to remove this whole if() block:
		HX_ASSERT(0  &&  "mailto: [e-mail]");
		goto cleanup; //Don't insert this because it can't ever play.
	    }
#endif

            // If this element uses media markers for clipBegin
            // then those markers need to be resolved
            if (pNode->m_pElement->m_bClipBeginUsesMarker &&
                !pNode->m_pElement->m_bClipBeginMarkerResolved)
            {
                // Set the flag saying we WOULD have scheduled
                // this element except the clip begin marker wasn't
                // resolved yet.
                pNode->m_pElement->m_bWaitingOnClipBeginToResolve = TRUE;
                goto cleanup; // don't insert cause we don't know the clipBegin yet
            }

            // If this element uses media markers for clipEnd
            // then those markers need to be resolved
            if (pNode->m_pElement->m_bClipEndUsesMarker &&
                !pNode->m_pElement->m_bClipEndMarkerResolved)
            {
                // Set the flag saying we WOULD have scheduled
                // this element except the clip end marker wasn't
                // resolved yet.
                pNode->m_pElement->m_bWaitingOnClipEndToResolve = TRUE;
                goto cleanup; // don't insert cause we don't know the clipEnd yet
            }

	    // skip the element if its duration == 0
	    if (0 == pNode->m_pElement->m_ulDuration)
	    {
		durationResolved(pNode->m_id, 0);
	    }
	    else
	    {
                // XXXMEH - we need to know about animations that
                // involve sources before we know about the sources.
                // Therefore, we need to ensure that the animate
                // elements are put before the source elements.
                UINT32 ulTS = INITIAL_STREAM1_TIMESTAMP;
                if (pNode->m_tag == SMILAnimate      ||
                    pNode->m_tag == SMILSet          ||
                    pNode->m_tag == SMILAnimateColor ||
                    pNode->m_tag == SMILAnimateMotion)
                {
                    ulTS = INITIAL_STREAM0_TIMESTAMP;
                }
		pNode->m_pElement->m_ulDelay               = ulDelay;
		pNode->m_pElement->m_ulTimestamp           = ulTS;
		pNode->m_pElement->m_bInsertedIntoTimeline = TRUE;
		pNode->m_pElement->m_bHasBeenScheduled = TRUE;

		// /This helps fix problem where time container has multiple
		// begin conditions and, when second begin was being
		// processed, wasn't being seen as having started before so
		// prepForRestart() wasn't being called when it should.
		// Allow more than one level, i.e., recurse up the tree to
		// set this for all ancestor time containers:
		SMILNode* pNextHigherSyncAncestor = pSyncAncestor;
		while (pNextHigherSyncAncestor  &&
			pNextHigherSyncAncestor->m_pElement)
		{
		    pNextHigherSyncAncestor->m_pElement->m_bInsertedIntoTimeline = TRUE;
		    pNextHigherSyncAncestor->m_pElement->m_bHasBeenScheduled = TRUE;
		    pNextHigherSyncAncestor = getSyncAncestor(
			    pNextHigherSyncAncestor);
		}

		insertElementByTimestamp(pNode->m_pElement);
	    }
	}
    }
cleanup:
    return;
}

HX_RESULT
CSmilParser::trackRemoved(const char* pID,
			  UINT32 ulDuration)
{
    HX_RESULT	hr = HXR_OK;
    SMILNode*	pNode = NULL;
    IHXBuffer* pBuf = NULL;

    if(m_pIDMap->Lookup(pID, (void*&)pNode))
    {
	// add duration to parent element
	if(pNode &&
	   pNode->m_pElement &&
	   pNode->m_pElement->m_pTimelineElement)
	{
	    pNode->m_pElement->m_pTimelineElement->resetDuration(ulDuration);
	}
    }

    return hr;
}

void
CSmilParser::resetTimelineElementDuration(const char* pID,
	// /These durations must NOT include delay (for PR 79699 et al):
	UINT32 ulPureDuration,
	UINT32 ulPriorPureDuration)
{
#if defined(_DEBUG)  &&  defined(XXXEHODGE_DEBUG_RESETTIMELINEELEMENTDUR_AND_DELAY)
{
    FILE* f1 = ::fopen("c:\\smil2ResetTimelineDurOrDelay.txt", bFirstResetTimelineElementDuration?"w":"a+");
    bFirstResetTimelineElementDuration = FALSE;
    ::fprintf(f1, "Element id = %s;\t%sresetting (pure) duration to %lu from %lu\n",
	    pID, ulPureDuration==ulPriorPureDuration?
#if XXXEH_TEST_THIS_MORE
	    "Skipping ":"",
#else
	    "":"",
#endif
	    ulPureDuration, ulPriorPureDuration);
    ::fclose(f1);

    f1 = ::fopen("c:\\smil2AddDuration.txt", "a+");
    ::fprintf(f1, "\nElement id = %s;\t%sresetting duration to %lu from %lu\n\n",
	    pID, ulPureDuration==ulPriorPureDuration?
#if XXXEH_TEST_THIS_MORE
	    "Skipping ":"",
#else
	    "":"",
#endif
	    ulPureDuration, ulPriorPureDuration);
    ::fclose(f1);
}
#endif

    SMILNode* pNode = NULL;
    // /Fixes bug exposed by fixes for PR 59584 and others (by undoing the
    // original fix for PR 61174(version1) and par version of PR 56686).
    // Don't reset duration if it's the same, otherwise SourceUpdate will be
    // created possibly prior to TrackDurationSet() even being called, which
    // would cause this delay event to be used to possibly mess things up in
    // rendererInitialized():
#if defined(XXXEH_TEST_THIS_MORE)
    // /TEST THIS! A test file fails due to this when both are same,
    // "..relatedToPR59584andPR62688(endsync1stWithRestartVersion..smil"
    if (ulPureDuration == ulPriorPureDuration)
    {
	goto cleanup;
    }
#endif
    if(m_pIDMap->Lookup(pID, (void*&)pNode))
    {
	CSmilSourceUpdate* pUpdate = new CSmilSourceUpdate;
	pUpdate->m_ulTimestamp = INITIAL_STREAM1_TIMESTAMP;
	pUpdate->m_srcID = pID;
	pUpdate->m_updateTag = UpdateDuration;
	pUpdate->m_ulUpdatedDuration = ulPureDuration;
	pUpdate->m_bDurationIsPureOfDelay = TRUE;
	if(!m_pSourceUpdateList)
	{
	    m_pSourceUpdateList = new CHXSimpleList;
	}
	m_pSourceUpdateList->AddTail(pUpdate);
	insertElementByTimestamp(pUpdate);
    }
#if defined(XXXEH_TEST_THIS_MORE)
cleanup:
#endif
    return;
}

void
CSmilParser::resetTimelineElementDelay(const char* pID,
				       UINT32 ulDelay,
				       UINT32 ulPriorDelay)
{
#if defined(_DEBUG)  &&  defined(XXXEHODGE_DEBUG_RESETTIMELINEELEMENTDUR_AND_DELAY)
{
    FILE* f1 = ::fopen("c:\\smil2ResetTimelineDurOrDelay.txt", bFirstResetTimelineElementDuration?"w":"a+");
    bFirstResetTimelineElementDuration = FALSE;
    ::fprintf(f1, "Element id = %s;\t%sresetting delay to %lu from %lu\n",
	    pID, ulDelay==ulPriorDelay?"Skipping ":"", ulDelay, ulPriorDelay);
    ::fclose(f1);

    f1 = ::fopen("c:\\smil2AddDuration.txt", "a+");
    ::fprintf(f1, "\nElement id = %s;\t%sresetting delay to %lu from %lu\n\n",
	    pID, ulDelay==ulPriorDelay?"Skipping ":"", ulDelay, ulPriorDelay);
    ::fclose(f1);
}
#endif

    SMILNode* pNode = NULL;
    // /Fixes bug exposed by fixes for PR 59584 and others (by undoing the
    // original fix for PR 61174(version1) and par version of PR 56686).
    // Don't reset delay if it's the same, otherwise SourceUpdate will be
    // created possibly prior to TrackDurationSet() even being called, which
    // would cause this delay event to be used to possibly mess things up in
    // rendererInitialized():
    if (ulDelay == ulPriorDelay)
    {
	goto cleanup;
    }
    if(m_pIDMap->Lookup(pID, (void*&)pNode))
    {
	CSmilSourceUpdate* pUpdate = new CSmilSourceUpdate;
	pUpdate->m_ulTimestamp = INITIAL_STREAM1_TIMESTAMP;
	pUpdate->m_srcID = pID;
	pUpdate->m_updateTag = UpdateDelay;
	pUpdate->m_ulUpdatedDelay = ulDelay;

	if(!m_pSourceUpdateList)
	{
	    m_pSourceUpdateList = new CHXSimpleList;
	}
	m_pSourceUpdateList->AddTail(pUpdate);
	insertElementByTimestamp(pUpdate);
    }
cleanup:
    return;
}


CSmilElement*
CSmilParser::findElement(const char* pID)
{
    SMILNode* pNode = NULL;
    if(m_pIDMap->Lookup(pID, (void*&)pNode))
    {
	return pNode->m_pElement;
    }
    return NULL;
}

const char*
CSmilParser::assignID(const char* pPrefix)
{
    SafeSprintf(m_pVarName, 256, "%s_%ld", pPrefix, GetUniqueNumber());
    return m_pVarName;
}

UINT16
CSmilParser::getFragmentGroup(const char* pFragment)
{
    if(pFragment)
    {
	SMILNode* pNode = 0;
	if(m_pIDMap->Lookup(pFragment, (void*&)pNode))
	{
	    if(!pNode->m_bDelete)
	    {
		if(pNode->m_tag == SMILAAnchor ||
		    pNode->m_tag == SMILSwitch)
		{
		    SMILNode* pChildNode = getTimelineDescendent(pNode, NULL);
		    while(pChildNode)
		    {
			if(!pChildNode->m_bDelete)
			{
			    return pChildNode->m_nGroup;
			}
			pChildNode = getTimelineDescendent(pNode, pChildNode);
		    }
		}
		else if(pNode->m_tag == SMILAnchor  ||
			pNode->m_tag == SMILArea)
		{
		    SMILNode* pParentNode = pNode->m_pParent;
		    if(pParentNode &&
			!pParentNode->m_bDelete)
		    {
			return pParentNode->m_nGroup;
		    }
		}
		else
		{
		    return pNode->m_nGroup;
		}
	    }
	}
    }
    return 0;
}

UINT32
CSmilParser::getFragmentOffset(const char* pFragment,
	//This BOOL will be set to FALSE if the fragment
	// does not exist; this was necessary to fix PR 22655.
	BOOL& bFragFoundAndResolved,
	BOOL bResolveBeginOfFragmentTarget,
	ULONG32 ulCurTime)
{
    bFragFoundAndResolved = FALSE;
    if(pFragment)
    {
	INT32 lAnchorBegin = 0;
	SMILNode* pNode = NULL;
	CSmilElement* pElement = NULL;
	CSmilElement* pFragmentElement = NULL;
	if(m_pIDMap->Lookup(pFragment, (void*&)pNode) &&
	    pNode->m_pElement)
	{
	    pElement = pNode->m_pElement;
	    if(pNode->m_tag == SMILSwitch ||
		pNode->m_tag == SMILAAnchor)
	    {
		SMILNode* pChildNode = getTimelineDescendent(
		    pNode, NULL);
		while(pChildNode)
		{
		    if(!pChildNode->m_bDelete)
		    {
			pFragmentElement = pChildNode->m_pElement;
			break;
		    }
		    pChildNode = getTimelineDescendent(
			pNode, pChildNode);
		}
	    }
	    else if(pNode->m_tag == SMILAnchor  ||
		    pNode->m_tag == SMILArea)
	    {
		if(pElement->m_bBeginOffsetSet)
		{
		    lAnchorBegin = pElement->m_lBeginOffset;
		}
		SMILNode* pParent = pNode->m_pParent;
		if(pParent)
		{
		    pFragmentElement = pParent->m_pElement;
		}
	    }
	    else
	    {
		pFragmentElement = pElement;
	    }

	    if(pFragmentElement)
	    {
		bFragFoundAndResolved = TRUE;
		//[SMIL 1.0 Compliance] Fixes PR 26464:
		// Use delay (which already includes begin offset)
		// if it's a valid value, else use begin offset
		// without delay added (see comment below):
		if(pFragmentElement->m_ulDelay != (UINT32)-1)
		{
		    INT32 offset = pFragmentElement->m_ulDelay +
			lAnchorBegin;

		    return (offset >= 0 ? (UINT32)offset: 0);
		}
		else if(pFragmentElement->m_bBeginOffsetSet)
		{
		    //Changed this while fixing PR 26464:
		    // This used to return pFragmentElement->m_ulDelay +
		    // pFragmentElement->m_lBeginOffset + lAnchorBegin but
		    // the delay can already account for the begin if both
		    // are set so we'd end up seeking past where we were
		    // supposed to go by the amount of the begin offset.
		    // Also, we weren't even checking to see
		    // if delay was valid before using it (and now we're
		    // sure it is invalid per check above):
		    INT32 offset = pFragmentElement->m_lBeginOffset +
			lAnchorBegin;

		    return (offset >= 0 ? (UINT32)offset: 0);
		}
		// /Fixes SMIL 2.0 Interop Linking tests #1.4 & #1.5:
		// if we've been instructed to resolve this #-ref'd
		// internally-linked element's delay, then we need to
		// do so to the current time:
		else if (bResolveBeginOfFragmentTarget  &&
			pFragmentElement->m_pTimelineElement)
		{
		    SMILNode* pSyncAncestor =
			    getSyncAncestor(pFragmentElement->m_pNode);
		    // /Fixes PR 50848:
		    // /The following is needed to completely fix SMIL 2.0
		    // Interop Linking #1.5 (to make the clicked-on child of
		    // a seq go away when the clicked-to one starts):
		    if (pSyncAncestor  &&  SMILSeq == pSyncAncestor->m_tag)
		    {
			SMILNode* pSibling = pSyncAncestor->getFirstChild();
			SMILNode* pPrevSibling = NULL;
			while (pSibling)
			{
			    if (pSibling->m_id ==
				    pFragmentElement->m_pNode->m_id)
			    {
				break;
			    }
			    // /Fixes case where pFragmentElement has non-
			    // timeline-element parent, e.g., <a> or <switch>
			    else if (pFragmentElement->m_pNode->m_pParent !=
				    pSyncAncestor)
			    {
				SMILNode* pFirstSiblingChild =
					pSibling->getFirstChild();
				if (pFirstSiblingChild  &&
					pFirstSiblingChild->m_id ==
					pFragmentElement->m_pNode->m_id)
				{
				    break;
				}
			    }

			    pPrevSibling = pSibling;
			    pSibling = pSyncAncestor->getNextChild();
			}
			if (pPrevSibling)
			{
			    // /XXXEH- TODO: if prev sib is not a timeline
			    // element, use its first child as prev sibling.
			    if (pPrevSibling->m_pElement  &&
				   pPrevSibling->m_pElement->m_pTimelineElement)