smltime.cpp

linux下的一款播放器

	    }
	    
	    pnr = HXR_OK;
	    setDuration(ulTimeFinished, FALSE);
	}
    }
    return pnr;
}


void
// /XXXEH- TODO: [20010411] we need to get more information about *what* just
// got resolved so we don't re-resolve the m_pSourceElement on something
// that it already has resolved.  For instance, if the duration of
// pEventElement changed, we only want to resolve or re-resolve
// m_pSourceElement's begin and/or end time that are based on the *end* of
// the event element, and leave be its sync-arcs that are based on the
// *begin* of the event element.
// /XXXEH- TODO: [20010411] Don't set m_bBeginOffsetSet and other vars here;
// wait until the begin|end list is evaluated to get the current
// instance begin|end time (which may not be the sync arc that gets
// resolved herein).  Also, do this for par|seq|excl::elementResolved
CSmilTimelineElement::elementResolved(CSmilTimelineElement* pEventElement)
{
    UINT32 ulPriorPureDuration = m_pSourceElement->getPureDuration();

    BOOL bIsPlayableObjectNotInsertedInTimeline = FALSE;
    if (!pEventElement->m_pSourceElement  ||
	    (pEventElement->m_pSourceElement->m_pNode  &&
	    (m_pParser->isMediaObject(
	    pEventElement->m_pSourceElement->m_pNode)  ||
	    m_pParser->isNonMediaPlayableObject(
	    pEventElement->m_pSourceElement->m_pNode) )  &&
	    !pEventElement->m_pSourceElement->m_bInsertedIntoTimeline) )
    {
	bIsPlayableObjectNotInsertedInTimeline = TRUE;
    }

    // /Fixes SMIL 2.0 Interop Timing #28.2 (which is PR 52571):
    // If eventElement can't begin because it begins and ends before its
    // parent begins, then don't propagate its time to other elements:
    if (pEventElement->m_pSourceElement->m_bBeginOffsetSet  &&
	    pEventElement->m_pSourceElement->m_lBeginOffset < 0)
    {
	if (0 == pEventElement->m_pSourceElement->m_ulDuration)
	{
	    return;
	}
    }

    BOOL bNeedToResolveBeginTimeListVals = FALSE;
    BOOL bNeedToResolveEndTimeListVals = FALSE;
    BOOL bWasInsertedOntoTimeline = FALSE;

    BOOL bIsInExcl = m_pParser->hasAncestor(SMILExcl,
	    m_pSourceElement->m_pNode);
    BOOL bPreviousDelaySetVal = m_bDelaySet;
    BOOL bUseBeginOffsetForPendingBeginList = FALSE;;
    // /If we are in an excl and we are beginning after our excl parent's
    // current child-derived end, then go ahead and insert into the timeline,
    // else see all "We need to go through ..." notes, below.  This fixes
    // Interop Timing cases #9.35 & 9.36 (that broke while fixing 15.13):
    // Note that we don't want to insert ANY element that begins after its
    // parent's immutable end time):
    BOOL bCantExtendParentDuration = FALSE;
    ULONG32 ulParentEnd = (UINT32)-1;
    SMILNode* pSyncBaseNode = m_pParser->getSyncAncestor(
	    m_pSourceElement->m_pNode);
    LONG32 lSourceElementDelayAdjustmentToSyncBaseTime = 0;
    if (pSyncBaseNode  &&  pSyncBaseNode->m_pElement)
    {
	// /XXXEH- TODO: handle case where endsync is SMILEventSourceID and
	// id matches m_pSourceElement->m_pNode->m_id:
	// /XXXEH- TODO: also handle when sync parent has indefinite end|dur:
	if (!pSyncBaseNode->m_pElement->m_bHasExplicitEnd  &&
		!pSyncBaseNode->m_pElement->m_bHasExplicitDur  &&
		(SMILEventSourceFirst !=
		pSyncBaseNode->m_pElement->m_nEndsyncEventSourceTag  &&
		SMILEventSourceID !=
		pSyncBaseNode->m_pElement->m_nEndsyncEventSourceTag) )
	{
	    bCantExtendParentDuration = FALSE;
	    if ((UINT32)-1 != pSyncBaseNode->m_pElement->m_ulDuration  &&
		    (UINT32)-1 != pSyncBaseNode->m_pElement->m_ulDelay)
	    {
		ulParentEnd = pSyncBaseNode->m_pElement->m_ulDelay +
			pSyncBaseNode->m_pElement->m_ulDuration;
	    }
	}
	else
	{
	    bCantExtendParentDuration = TRUE;
	    if (bIsPlayableObjectNotInsertedInTimeline)
	    {
		// /Fixes BUG-20010423_nothingShouldPlay_beginBasedOn....smi:
		// If eventElement begins after its parent ends, then don't
		// propagate its time to other elements:
		if ((UINT32)-1 == pEventElement->m_pSourceElement->m_ulDelay  ||
			pEventElement->m_pSourceElement->m_ulDelay >=
			pSyncBaseNode->m_pElement->m_ulDelay +
			pSyncBaseNode->m_pElement->m_ulDuration)
		{
		    return; // /Starts too late.
		}
	    }
	}
    }

    //First, let's see if we have a begin event to resolve:
    // /Combining handling of SMILEventSourceBegin and SMILEventSourceClock
    // fixes SMIL 1.0-syntax PR 112740; the ancient fix for the SMIL2-syntax
    // version is already in the below code; it's about time we combine
    // this code, anyway. (SMILEventSourceClock is only used in SMIL 1.0-
    // syntax syncArcs with clock offsets) :
    if ( (m_pSourceElement->m_nBeginEventSourceTag == SMILEventSourceBegin  ||
	    m_pSourceElement->m_nBeginEventSourceTag == SMILEventSourceClock)  &&
	    m_pSourceElement->m_BeginEventSourceID == pEventElement->m_pID)
    {
	if(pEventElement->m_bDelaySet)
	{
	    // /Be sure not to overflow using ULONGs since
	    // beginEventClockValue might be negative:
	    LONG32 lDelay =
		(LONG32)pEventElement->m_pSourceElement->m_ulDelay +
		m_pSourceElement->m_lBeginEventClockValue;
	    // /Fixes SMIL 2.0 Interop Timing #28.1 and others that have
	    // sync-arc to an element with a negative begin time:
	    if (pEventElement->m_pSourceElement->m_bBeginOffsetSet  &&
		    pEventElement->m_pSourceElement->m_lBeginOffset < 0)
	    {
		lDelay += pEventElement->m_pSourceElement->m_lBeginOffset;
	    }
	    // /Fixes PR 82736 (begin=x.being... case) where sync-arc begin
	    // results in negative offset from parent and we've already
	    // adjusted for that:
	    else if (pSyncBaseNode->m_pElement->m_ulDelay > lDelay  &&
		    // /If already inserted, then adjustForNegativeOffset()
		    // won't re-do any adjustment:
		    m_pSourceElement->m_bInsertedIntoTimeline  &&
		    !m_pSourceElement->m_bIsRestarting)
	    {
		// /Don't go earlier than synbase:
		lDelay = pSyncBaseNode->m_pElement->m_ulDelay;
	    }

	    m_bDelaySet = TRUE;
	    m_pSourceElement->m_ulDelay = lDelay<0? 0: (ULONG32)lDelay;
	    if (lDelay < 0)
	    {
		UINT32 ulDiff = (UINT32)(-lDelay);
		// /If clip-begin is invalid, set it otherwise add to orig:
		m_pSourceElement->m_ulClipBegin = ((UINT32)-1 ==
		        m_pSourceElement->m_ulAuthoredClipBegin? ulDiff :
			ulDiff+m_pSourceElement->m_ulAuthoredClipBegin);
		// /logicChange_test.smi: check if -1 before subtracting delay!:
		if ((UINT32)-1 != m_pSourceElement->m_ulDuration)
		{
		    if (m_pSourceElement->m_ulDuration > ulDiff)
		    {
			m_pSourceElement->m_ulDuration -= ulDiff;
		    }
		    // /else duration is negative; it can't ever play.
		    else
		    {
			m_pSourceElement->m_ulDuration = 0;
		    }
		}
	    }
	    // /Now, if our begin delay (not offset) is based on a syncArc,
	    // we need to adjust our dur by the difference between our delay
	    // and our syncBase element's delay:
	    if ((UINT32)-1 != m_pSourceElement->m_ulDuration  &&
		    m_pSourceElement->m_bEndOffsetSet  &&
		    WAY_IN_THE_FUTURE != m_pSourceElement->m_ulDuration)
	    {
		LONG32 lSum = m_pSourceElement->m_lEndOffset;
		// /We need to remove our delay or it will get counted twice
		lSum -= m_pSourceElement->m_ulDelay;
		HX_ASSERT(lSum >= 0  &&  "ehodge: handle neg delay propogation");
		m_pSourceElement->m_ulDuration = (UINT32)(lSum<0 ? 0 : lSum);
		// /Fixes PR 80371: If our duration was set before and is now
		// re-resolving, make sure the following flag is reset to false
		// in case it wasn't before, otherwise show/hide code will
		// subtract the delay from a duration that doesn't include the
		// delay:
		m_pSourceElement->m_bDurationIncludesDelayBeyondSyncbase = FALSE;
	    }

	    bNeedToResolveBeginTimeListVals = TRUE;
	    if (HXR_OK == m_pParser->adjustForNegativeOffset(m_pID))
	    {
		if (!m_pSourceElement->m_bHasBeenScheduled  ||
			// /Helps fix PR 50588: if restarting, hasBeenSched
			// will still be true, so check if inserted instead:
			(m_pSourceElement->m_bIsRestarting  &&
			!m_pSourceElement->m_bInsertedIntoTimeline) )
		{
		    // /We need to go through the proper channels if we're
		    // in an excl; a priorityClass may prevent us from
		    // starting or may defer our start, so just add us to
		    // the pending begin time list (unless we're extending
		    // the end of our excl parent, as described above):
		    // /First, see if our delay is beyond our parent's end:
		    BOOL bDelayIsBeyondParentEnd = FALSE;
		    if ((UINT32)-1 != ulParentEnd)
		    {
			bDelayIsBeyondParentEnd =
				(m_pSourceElement->m_ulDelay > ulParentEnd);
		    }
		    BOOL bInsertElement = bIsInExcl?
			    (bDelayIsBeyondParentEnd  &&
			    !bCantExtendParentDuration) :
			    ( !(bDelayIsBeyondParentEnd  &&
			    bCantExtendParentDuration) );
		    // /But hold on: if parent's delay isn't yet resolved,
		    // then we can't be inserted until it resolves.  Found
		    // this while fixing long-sync-arc bug PR 64498, par test:
		    // "..._longSyncArcBug-ParWithoutDur...sync.smil":
		    BOOL bParentDelayIsUnresolved = FALSE;
		    if ((UINT32)-1 == pSyncBaseNode->m_pElement->m_ulDelay  ||
			    (pSyncBaseNode->m_pElement->m_pTimelineElement  &&
			    pSyncBaseNode->m_pElement->m_pTimelineElement->m_bDelayEvent  &&
			    !pSyncBaseNode->m_pElement->m_pTimelineElement->m_bDelaySet ))
		    {
			bInsertElement = FALSE;
			bParentDelayIsUnresolved = TRUE;
		    }

		    if (m_pSourceElement->m_bBeginOffsetSet)
		    {
			// /If it's already been set, then just add this
			// newly-resolved begin time to the pending queue
			// and let it get sorted out there.  This can
			// happen with begin="0s; foo.begin"
			bInsertElement = FALSE;
		    }

		    if (!bInsertElement)
		    {
			// /We need to maintain old "delaySet" value so
			// setDelay() call in eventual call to
			// checkPendingBeginAndEndTimes() can insert this
			// timeline element properly:
			m_bDelaySet = bPreviousDelaySetVal;

			// /Fixes PR 64498: flag the fact that long sync-arc
			// begin is resolving before parent begin is resolved:
			if (bParentDelayIsUnresolved)
			{
			    m_pSourceElement->
				m_bAwaitingSyncAncestorBeginNotification = TRUE;
			    m_pSourceElement->m_ulLongSyncArcBeginInGroupTime =
				    lDelay;
			}
			// /This else-if is the final fix for PR 64499: if
			// sync-base has multiple begin times, then we also
			// need to prepare for that event restarting it even
			// though its first begin is already resolved:
			else if (pSyncBaseNode->m_pElement->m_pBeginTimeList  &&
				pSyncBaseNode->m_pElement->m_pBeginTimeList->
				GetCount() > 1)
			{
			    m_pSourceElement->m_ulLongSyncArcBeginInGroupTime =
				    lDelay;
			}
			else
			{
			    m_pSourceElement->m_ulLongSyncArcBeginInGroupTime =
				    (UINT32)-1;
			}
		    }
		    else
		    {
			bWasInsertedOntoTimeline = TRUE;
			m_pSourceElement->m_ulLongSyncArcBeginInGroupTime =
				    (UINT32)-1;
			m_pParser->insertTimelineElement(m_pID, 
				m_pSourceElement->m_ulDelay);
		    }
		}
	    }
	}
    }
    else if(m_pSourceElement->m_nBeginEventSourceTag == SMILEventSourceEnd  &&
	    m_pSourceElement->m_BeginEventSourceID == pEventElement->m_pID  &&
	    // /Helps fix SMIL 2.0 Interop Timing #28.9 where end as set by parent
	    // was being used when element's end was actually indefinite (or any
	    // value greater than parent's end); that truncated end time should
	    // not propogate; only the pre-truncated time (if any) should be used:
	    (!pEventElement->m_pSourceElement->m_bCurEndClippedByParent) )
    {
	// /If event element's duration is "WAY_IN_THE_FUTURE" then it's
	// essentially an unresolved end time, so we should not resolve
	// based on it:
	if(pEventElement->m_bDurationSet  &&  WAY_IN_THE_FUTURE !=
		pEventElement->m_pSourceElement->m_ulDuration )
	{
	    ULONG32 ulPriorDelay = m_pSourceElement->m_ulDelay;
	    m_bDelaySet = TRUE;
	    // /Be sure not to overflow using ULONGs since
	    // beginEventClockValue might be negative:
	    LONG32 lDelay =
		    (LONG32)pEventElement->m_pSourceElement->m_ulDuration +
		    m_pSourceElement->m_lBeginEventClockValue;
	    // /If delay is not set, don't add it!:
	    if(pEventElement->m_bDelaySet)
	    {
		lDelay += (LONG32)pEventElement->m_pSourceElement->m_ulDelay;
		// /Fixes case where dur already accounts for begin offset
		// that's already built into the delay (e.g., begin="x.end-5"
		// where x has an explicit begin offset greater than zero):
		// /Helps fix PR 82736 (=x.begin case) by looking at flag and
		// not just blindly assuming beginOffset is included in
		// eventElement's m_ulDuration:
		if (pEventElement->m_pSourceElement->
			m_bDurationIncludesDelayBeyondSyncbase)
		{
		    HX_ASSERT((UINT32)-1 != pEventElement->m_pSourceElement->
			    m_ulBeginOffsetFromSyncBase);
		    if ((UINT32)-1 != pEventElement->m_pSourceElement->
			    m_ulBeginOffsetFromSyncBase)
		    {
			lDelay -= (LONG32)pEventElement->m_pSourceElement->
				m_ulBeginOffsetFromSyncBase;
		    }
		}
		// /Fixes case where third ref has begin="second.end" and
		// second has begin="first.end" where first.end is > 0.
		// In that case, begin offset won't be set but delay WILL
		// alread be part of the duration:
		else if (pEventElement->m_pSourceElement->m_ulDelay >
			pSyncBaseNode->m_pElement->m_ulDelay)
		{
		    ULONG32 ulDelayFromSyncBase =
			    pEventElement->m_pSourceElement->m_ulDelay -
			    pSyncBaseNode->m_pElement->m_ulDelay;
		    HX_ASSERT(lDelay>(LONG32)ulDelayFromSyncBase);
		    if (lDelay < (LONG32)ulDelayFromSyncBase)
		    {
			ulDelayFromSyncBase = lDelay;
		    }
		    lDelay -= (LONG32)ulDelayFromSyncBase;
		}
	    }

	    // /Fixes PR 82736 (begin=x.end... case) where sync-arc begin
	    // results in negative offset from parent and we've already
	    // adjusted for that:
	    if (pSyncBaseNode->m_pElement->m_ulDelay > lDelay  &&
		    // /If already inserted, then adjustForNegativeOffset()
		    // won't re-do any adjustment:
		    m_pSourceElement->m_bInsertedIntoTimeline  &&
		    !m_pSourceElement->m_bIsRestarting)
	    {
		// /Don't go earlier than synbase:
		lDelay = pSyncBaseNode->m_pElement->m_ulDelay;
	    }

	    m_pSourceElement->m_ulDelay = lDelay<0? 0: (ULONG32)lDelay;
	    if (lDelay < 0)
	    {
		UINT32 ulDiff = (UINT32)(-lDelay);
		// /If clip-begin is invalid, set it otherwise add to orig:
		m_pSourceElement->m_ulClipBegin = ((UINT32)-1 ==
		        m_pSourceElement->m_ulAuthoredClipBegin? ulDiff :
			ulDiff+m_pSourceElement->m_ulAuthoredClipBegin);
		if ((UINT32)-1 != m_pSourceElement->m_ulDuration)
		{