smltime.cpp

linux下的一款播放器

			     const char* pEndsyncID,
			     UINT32 ulEndsyncClockValue)
{
    m_eEndsyncType = eType;
    m_ulEndsyncClockValue = ulEndsyncClockValue;
    if(pEndsyncID)
    {
	m_pEndsyncID = new char[strlen(pEndsyncID)+1];
	strcpy(m_pEndsyncID, pEndsyncID); /* Flawfinder: ignore */
    }
}
#endif

/*
 * CSmil1TimelineSeq methods
 */
CSmil1TimelineSeq::CSmil1TimelineSeq(CSmil1Element* pSourceElement,
				   CSmil1Parser* pParser):
    CSmil1TimelineElement(pSourceElement, pParser),
    m_nDurationAdded(0)
{
}

void 
CSmil1TimelineSeq::addDuration(UINT32 ulDuration, 
			      UINT32 ulDelay,
			      const char* pID)
{
    ASSERT(m_pChildren);

    if(!m_bDurationSet)
    {
	if(m_pSourceElement->m_ulDuration == (UINT32)-1)
	{
	    m_pSourceElement->m_ulDuration = ulDuration;
	}
	else
	{
	    m_pSourceElement->m_ulDuration += ulDuration;
	}
    }

    m_nDurationAdded++;
    if(m_nDurationAdded == m_pChildren->GetCount())
    {
	m_bDurationSet = TRUE;
	if(m_pParent)
	{
	    m_pParent->addDuration(
		m_pSourceElement->m_ulDuration, 
		m_pSourceElement->m_ulDelay, m_pID);
	}
	if(m_pDependent)
	{
	    //XXXEH- should "m_pSourceElement->m_ulDelay +" be removed, too?
	    // I can't get any content to hit this line so I'm not going to
	    // change it.  See fix for PR SMIL/13983:
	    adjustDependentDuration(m_pDependent);
	    m_pDependent->setDelay(m_pSourceElement->m_ulDelay +
		m_pSourceElement->m_ulDuration);	    
	}
	// /[SMIL 1.0 Compliance] Fixes PR 23779:
	// if a source has event-based timing based on this seq's
	// duration, then we need to notify that source that we've
	// resolved this value:
        if (m_pParser && m_pParser->m_pTimelineElementManager)
        {
            m_pParser->m_pTimelineElementManager->notify(m_pID);
        }
    }
}

void 
CSmil1TimelineSeq::setDelay(UINT32 ulDelay)
{
    if(m_pSourceElement->m_ulBeginOffset != (UINT32)-1)
    {
	m_pSourceElement->m_ulDelay = ulDelay + 
	    m_pSourceElement->m_ulBeginOffset;
    }
    else
    {
	m_pSourceElement->m_ulDelay = ulDelay;
    }
    //XXXJHUG - we need to prevent overwriting the delay when
    // setInitalDelay is called on THIS element, changing this
    // bool causes initialDelaySet to return TRUE.
    m_bDelaySet = TRUE;
    if(m_pChildren && m_pChildren->GetCount() > 0)
    {
	// set delay on first child of seq
	CSmil1TimelineElement* pElement = 
	    (CSmil1TimelineElement*)m_pChildren->GetHead();
	pElement->setDelay(m_pSourceElement->m_ulDelay);
    }

    if (m_pSourceElement->m_ulDuration != (UINT32)-1)
    {
	setDuration(m_pSourceElement->m_ulDuration);
    }

    //[SMIL 1.0 Compliance] Helps fix PR 14420 and 23025:
    // if a source has event-based timing based on this seq's
    // begin time (delay) then we need to notify that source
    // that we've resolved this value:
    if (m_pParser && m_pParser->m_pTimelineElementManager)
    {
        m_pParser->m_pTimelineElementManager->notify(m_pID);
    }
}

void
CSmil1TimelineSeq::setDuration(UINT32 ulDuration, BOOL bSetFromParent)
{
    ASSERT(m_pChildren);

    if(!m_bDurationSet)
    {
	m_pSourceElement->m_ulDuration = ulDuration;
	m_bDurationSet = TRUE;
    }

    UINT32	ulDurationLeft = m_pSourceElement->m_ulDuration;
    RepeatTag	repeatTag = RepeatUnknown;

    CHXSimpleList::Iterator i = m_pChildren->Begin();
    for(; i != m_pChildren->End(); ++i)
    {
	CSmil1TimelineElement* pElement = (CSmil1TimelineElement*)(*i);

	if (!setElementDuration(ulDurationLeft, pElement))
	{
	    break;
	}
    }

    if(m_pDependent)
    {
	adjustDependentDuration(m_pDependent);	
	m_pDependent->setDelay(m_pSourceElement->m_ulDelay + m_pSourceElement->m_ulDuration);	
    }

    //[SMIL 1.0 comliance] Helps fix PR 14420 and 23025:
    if (m_pParser && m_pParser->m_pTimelineElementManager)
    {
        m_pParser->m_pTimelineElementManager->notify(m_pID);
    }
}

void
CSmil1TimelineSeq::setMaxDuration(UINT32 ulMaxDuration)
{
    HX_ASSERT(m_pChildren);
    m_bMaxDurationSet = TRUE;
    m_pSourceElement->m_ulMaxDuration = ulMaxDuration;

    if (m_pChildren)
    {
	CSmil1TimelineElement* pElement = (CSmil1TimelineElement*)m_pChildren->GetHead();
	pElement->setMaxDuration(ulMaxDuration);
    }
}

void 
CSmil1TimelineSeq::adjustDependentDuration(CSmil1TimelineElement* pDependent)
{
    if(m_bDurationSet || m_bMaxDurationSet)
    {
	UINT32	    ulDurationLeft = m_bDurationSet?m_pSourceElement->m_ulDuration:
						    m_pSourceElement->m_ulMaxDuration;
	BOOL	    bAdjusted = FALSE;
	RepeatTag   repeatTag = RepeatUnknown;

	CHXSimpleList::Iterator i = m_pChildren->Begin();
	for(; i != m_pChildren->End(); ++i)
	{
	    CSmil1TimelineElement* pElement = (CSmil1TimelineElement*)(*i);
	    UINT32 ulChildDuration = pElement->getDuration();

	    if (pElement == pDependent)
	    {
		bAdjusted = TRUE;
	    }

	    if (bAdjusted)
	    {
		if (!setElementDuration(ulDurationLeft, pElement))
		{
		    break;
		}
	    }
	    else
	    {
		if(ulDurationLeft >= ulChildDuration)
		{
		    ulDurationLeft -= ulChildDuration;
		}
		else
		{
		    ulDurationLeft = 0;
		}	    
	    }
	}

	if (!bAdjusted && m_pParent)
	{
	    m_pParent->adjustDependentDuration(pDependent);
	}
    }
}

BOOL
CSmil1TimelineSeq::setElementDuration(UINT32& ulDurationLeft, CSmil1TimelineElement* pElement)
{
    BOOL	bContinue = TRUE;
    UINT32	ulChildDuration = pElement->getDuration();	
    RepeatTag   repeatTag = pElement->m_pSourceElement->m_pNode->m_repeatTag;
	
    if (repeatTag == RepeatIndefiniteOnMe)
    {
	pElement->setMaxDuration(ulDurationLeft);
	ulDurationLeft = 0;
	goto cleanup;
    }
    else if (repeatTag == RepeatIndefiniteOnGroup)
    {
	pElement->setMaxDuration(ulDurationLeft);
	bContinue = FALSE;
	goto cleanup;
    }

    // no more duration left, take care of the duration of the rest of 
    // the elements
    if (0 == ulDurationLeft)
    {
	pElement->setDuration(ulDurationLeft, TRUE);
    }
    // if this is the last child, then enforce the duration whatever
    // left
    else if (pElement == m_pChildren->GetTail())
    {
	pElement->setDuration(ulDurationLeft, TRUE);
	bContinue = FALSE;
    }
    // unknown duration, so we apply max. duration here
    else if (ulChildDuration == (UINT32)-1)
    {
	pElement->setMaxDuration(ulDurationLeft);
	bContinue = FALSE;
    }
    else	
    {
	if(ulDurationLeft >= ulChildDuration)
	{
	    ulDurationLeft -= ulChildDuration;
	}
	else
	{
	    pElement->setDuration(ulDurationLeft, TRUE);
	    ulDurationLeft = 0;
	}
    }

cleanup:

    return bContinue;
}

/*
 * CSmil1TimelineAnchor methods
 */

CSmil1TimelineAnchor::CSmil1TimelineAnchor(CSmil1Element* pSourceElement,
				   CSmil1Parser* pParser):
    CSmil1TimelineElement(pSourceElement, pParser)
    , m_nDurationAdded(0)
{
}

CSmil1TimelineAnchor::~CSmil1TimelineAnchor()
{
}

void
CSmil1TimelineAnchor::elementResolved(CSmil1TimelineElement* pEventElement)
{
//XXXEH: shouldn't we be making sure the pEventElement's id
// matches the m_[XXX]EventSourceID?  Otherwise, a begin event on one id
// and an end event on another may cause problems...

    //First, let's see if we have a begin event to resolve:
    if(m_pSourceElement->m_nBeginEventSourceTag == SMILEventSourceBegin)
    {
	if(pEventElement->m_bDelaySet)
	{
	    //[SMIL 1.0 Compliance] Helps fix 14420:
	    if (m_bNonEventDelaySet)
	    {
		//Add non-event delay to begin event delay:
		m_pSourceElement->m_ulDelay += 
		    pEventElement->m_pSourceElement->m_ulDelay;
	    }
	    else
	    {
		//Just set delay to event delay:
		m_pSourceElement->m_ulDelay = 
		    pEventElement->m_pSourceElement->m_ulDelay;

	    }
	    m_bNonEventDelaySet = m_bDelaySet = TRUE;
	    if(m_pChildren)
	    {
		CHXSimpleList::Iterator i = m_pChildren->Begin();
		for(; i != m_pChildren->End(); ++i)
		{
		    CSmil1TimelineElement* pElement =
			    (CSmil1TimelineElement*)(*i);
		    pElement->setDelay(m_pSourceElement->m_ulDelay);
		}
	    }
	}
    }
    else if(m_pSourceElement->m_nBeginEventSourceTag == SMILEventSourceEnd)
    {
	if(pEventElement->m_bDurationSet)
	{
	    //[SMIL 1.0 Compliance] Helps fix 14420:
	    if (m_bNonEventDelaySet)
	    {
		//Add non-event delay to begin event delay:
		m_pSourceElement->m_ulDelay += 
		    pEventElement->m_pSourceElement->m_ulDuration +
		    pEventElement->m_pSourceElement->m_ulDelay;
	    }
	    else
	    {
		//Just set delay to event delay:
		m_pSourceElement->m_ulDelay = 
		    pEventElement->m_pSourceElement->m_ulDuration +
		    pEventElement->m_pSourceElement->m_ulDelay;

	    }
	    m_bNonEventDelaySet = m_bDelaySet = TRUE;
	    if(m_pChildren)
	    {
		CHXSimpleList::Iterator i = m_pChildren->Begin();
		for(; i != m_pChildren->End(); ++i)
		{
		    CSmil1TimelineElement* pElement =
			    (CSmil1TimelineElement*)(*i);
		    pElement->setDelay(m_pSourceElement->m_ulDelay);
		}
	    }
	}
    }
    else if(m_pSourceElement->m_nBeginEventSourceTag == SMILEventSourceClock)
    {
	//We want event *BEGIN* plus clock therefor check for m_bDelaySet not
	// m_bDurationSet; after all, it's the eventElement's m_ulDelay
	// that's used, below:
	if(pEventElement->m_bDelaySet)
	{
	    if (m_bNonEventDelaySet)
	    {
		//Add non-event delay to begin event delay + clock val:
		m_pSourceElement->m_ulDelay += 
		    pEventElement->m_pSourceElement->m_ulDelay +
		    m_pSourceElement->m_ulBeginEventClockValue;
	    }
	    else
	    {
		//Just set delay to event delay:
		m_pSourceElement->m_ulDelay = 
		    pEventElement->m_pSourceElement->m_ulDelay +
		    m_pSourceElement->m_ulBeginEventClockValue;

	    }
	    m_bNonEventDelaySet = m_bDelaySet = TRUE;
	    if(m_pChildren)
	    {
		CHXSimpleList::Iterator i = m_pChildren->Begin();
		for(; i != m_pChildren->End(); ++i)
		{
		    CSmil1TimelineElement* pElement =
			    (CSmil1TimelineElement*)(*i);
		    pElement->setDelay(m_pSourceElement->m_ulDelay);
		}
	    }
	}
    }

    
//XXXEH: shouldn't we be making sure the pEventElement's id
// matches the m_[XXX]EventSourceID, otherwise a begin event on one id
// and an end event on another will cause problems.
#if defined(XXXEH_UNTESTED_AND_NOT_EXAMINED_WELL)
    if(m_pSourceElement->m_nEndEventSourceTag == SMILEventSourceBegin)
    {
	if(pEventElement->m_bDelaySet)
	{
	    durationResolved(pEventElement->m_pSourceElement->m_ulDelay);
	}
    }
    else if(m_pSourceElement->m_nEndEventSourceTag == SMILEventSourceEnd)
    {
	if(pEventElement->m_bDurationSet)
	{
	    durationResolved(pEventElement->getDuration());
	}
    }
    else if(m_pSourceElement->m_nEndEventSourceTag == SMILEventSourceClock)
    {
	if(pEventElement->m_bDelaySet)
	{
	    durationResolved(pEventElement->m_pSourceElement->m_ulDelay +
		    m_pSourceElement->m_ulEndEventClockValue);
	}
    }
#endif // defined(XXXEH_UNTESTED_AND_NOT_EXAMINED_WELL).
}

void
CSmil1TimelineAnchor::durationResolved(UINT32 ulDuration)
{
    if(!m_bDurationSet)
    {
	m_bDurationSet = TRUE;
	m_pSourceElement->m_ulDuration = ulDuration;
    }
}