sitewatc.cpp

linux下的一款播放器

    {
        return m_lRefCount;
    }

    delete this;

    return 0;
}

STDMETHODIMP CSmilSiteWatcher::AttachSite(IHXSite* pSite)
{
    HX_RESULT retVal = HXR_OK;

    HX_RELEASE(m_pSite);
    m_pSite = pSite;
    if(m_pSite)
    {
        m_pSite->AddRef();
    }

    return retVal;
}

STDMETHODIMP CSmilSiteWatcher::DetachSite()
{
    HX_RESULT retVal = HXR_OK;

    HX_RELEASE(m_pSite);

    return HXR_OK;
}

STDMETHODIMP CSmilSiteWatcher::ChangingPosition(HXxPoint      oldPos,
                                                REF(HXxPoint) newPos)
{
    HX_RESULT retVal = HXR_OK;

    if(!m_bChangingSize)
    {
        CSmilBasicRegion* pRegion = m_pDoc->getRegionByID(m_id);
        if(pRegion && m_bMediaSizeSet)
        {
            // Pick the rect to use as the parent. If we 
            // have a ResizeBehavior of Zoom and are indeed
            // zooming, then use the unzoomed parent width.
            // Otherwise, use the regular zoomed parent width.
            HXxRect cRect = pRegion->m_rect;
            if ((m_dZoomScaleFactorX != 1.0 ||
                 m_dZoomScaleFactorY != 1.0) &&
                m_eResizeBehavior == ResizeZoom)
            {
                cRect = pRegion->m_RectNoZoom;
            }
            // First we need to compute the subregion rect. We can't
            // do this just once, since the subregion rect parameters
            // may be getting animated.
            HXxRect cSubRegionRect = {0, 0, 0, 0};
            CSmilBasicRegion::resolveDimension(m_Rect.m_dLeft,  m_Rect.m_eLeftType,
                                               m_Rect.m_dRight, m_Rect.m_eRightType,
                                               m_Rect.m_dWidth, m_Rect.m_eWidthType,
                                               TRUE, HXxRECT_WIDTH(cRect),
                                               cSubRegionRect.left,
                                               cSubRegionRect.right);
            CSmilBasicRegion::resolveDimension(m_Rect.m_dTop,    m_Rect.m_eTopType,
                                               m_Rect.m_dBottom, m_Rect.m_eBottomType,
                                               m_Rect.m_dHeight, m_Rect.m_eHeightType,
                                               TRUE, HXxRECT_HEIGHT(cRect),
                                               cSubRegionRect.top,
                                               cSubRegionRect.bottom);
            // The calculation above was done in the space of the
            // region. The calculations below are done in the space
            // of the region's parent, so we need to offset the subregion
            // rect by the region's upper left corner.
            cSubRegionRect.left   += cRect.left;
            cSubRegionRect.top    += cRect.top;
            cSubRegionRect.right  += cRect.left;
            cSubRegionRect.bottom += cRect.top;
            // Now we need to compute the absolute coordinates
            // of the regPoint. Since the regPoint could be in
            // percentage values, and the size of the region
            // could be changing under animation, then we 
            // must recompute the absolute coordinates of the
            // regPoint every time. This regPoint is in the
            // space of the region's PARENT and not in the space
            // of the region's rect itself.
            HXxPoint cRegPoint = {0, 0};
            m_pDoc->computeRegPoint(cSubRegionRect,
                                    m_RegPoint,
                                    cRegPoint);
            // Now that we know the absolute coordinates
            // of the regPoint, then we can compute the 
            // media layout within the region rect. Note
            // that the following calculation takes place
            // in the coordinate space of the region's PARENT,
            // and not the region's rect itself.
            HXxRect  cMediaRect = {0, 0, 0, 0};
            retVal = m_pDoc->computeMediaLayout(cSubRegionRect,
                                                m_eFit,
                                                cRegPoint,
                                                m_RegPoint.m_eRegAlign,
                                                m_MediaSize,
                                                cMediaRect,
                                                m_bMediaIsBrush);
            if (SUCCEEDED(retVal))
            {
                // Now since the calculation of the media size was
                // done in the space of the region's PARENT, then
                // and we need to set the size of the media in the
                // coordinate space of the REGION, then we need
                // to translate the media rect to the coordinate
                // space of the region.
                cMediaRect.left   -= cRect.left;
                cMediaRect.top    -= cRect.top;
                cMediaRect.right  -= cRect.left;
                cMediaRect.bottom -= cRect.top;
                // Now we can assign the new position
                newPos.x = cMediaRect.left;
                newPos.y = cMediaRect.top;
                // If we have a resize behavior of Zoom, then
                // we compute everything off of the original root-layout
                // size, and then simply scale by the zoom factors.
                if ((m_dZoomScaleFactorX != 1.0 ||
                     m_dZoomScaleFactorY != 1.0) &&
                    m_eResizeBehavior == ResizeZoom)
                {
                    newPos.x = (INT32) floor(m_dZoomScaleFactorX * ((double) newPos.x) + 0.5);
                    newPos.y = (INT32) floor(m_dZoomScaleFactorY * ((double) newPos.y) + 0.5);
                }
            }
        }
    }

    MLOG_LAYOUT(NULL,
                "%lu\tChangingPosition((%ld,%ld),(%ld,%ld)) m_id=%s m_SourceID=%s\n",
                HX_GET_BETTERTICKCOUNT(),
                oldPos.x, oldPos.y, newPos.x, newPos.y,
                (const char*) m_id,
                (const char*) m_SourceID);

    return retVal;
}

STDMETHODIMP CSmilSiteWatcher::ChangingSize(HXxSize      oldSize,
                                            REF(HXxSize) newSize)
{
    HX_RESULT retVal = HXR_OK;

    if(!m_bChangingSize &&
       (newSize.cx != 0 || newSize.cy != 0))
    {
        CSmilBasicRegion* pRegion = m_pDoc->getRegionByID(m_id);
        if(pRegion)
        {
            // For almost all renderers, here's the sequence of
            // events: the core calls them with IHXSite::AttachSite()
            // and in that call, they call IHXSite::SetSize() with
            // the native size of their media. Therefore, we will assume
            // that the first call we get will be the native size of
            // the media.
            BOOL bForceSetPosition = FALSE;
            
            BOOL bHasSiteUser = FALSE;
            IHXSiteUser* pUser = NULL;
            m_pSite->GetUser(pUser);
            if (pUser)
            {
                bHasSiteUser = TRUE;
            }
            HX_RELEASE(pUser);
            
            if (bHasSiteUser && m_bFirstSizeChange)
            {
                MLOG_LAYOUT(NULL,
                            "Media size for %s is (%ld,%ld)\n",
                            (const char*) m_SourceID,
                            newSize.cx, newSize.cy);
                // Save off the native media size
                m_MediaSize        = newSize;
                m_bMediaSizeSet    = TRUE;
                m_bFirstSizeChange = FALSE;
                bForceSetPosition  = TRUE;
                if (m_pDoc)
                {
                    m_pDoc->setMediaNativeSize(m_SourceID, newSize);
                }
                // XXXMEH - this is legacy, which saves
                // the media size into the region. However,
                // this SHOULD NOT be used, since multiple media
                // can play to the same region. TODO - if we 
                // can, make sure this is not used and then
                // delete it from the region object.
                pRegion->m_originalMediaSize = newSize;
                pRegion->m_bMediaSizeSet     = TRUE;
            }
            // Pick the rect to use as the parent. If we 
            // have a ResizeBehavior of Zoom and are indeed
            // zooming, then use the unzoomed parent width.
            // Otherwise, use the regular zoomed parent width.
            HXxRect cRect = pRegion->m_rect;
            if ((m_dZoomScaleFactorX != 1.0 ||
                 m_dZoomScaleFactorY != 1.0) &&
                m_eResizeBehavior == ResizeZoom)
            {
                cRect = pRegion->m_RectNoZoom;
            }
            // First we need to compute the subregion rect. We can't
            // do this just once, since the subregion rect parameters
            // may be getting animated.
            HXxRect cSubRegionRect = {0, 0, 0, 0};
            CSmilBasicRegion::resolveDimension(m_Rect.m_dLeft,  m_Rect.m_eLeftType,
                                               m_Rect.m_dRight, m_Rect.m_eRightType,
                                               m_Rect.m_dWidth, m_Rect.m_eWidthType,
                                               TRUE, HXxRECT_WIDTH(cRect),
                                               cSubRegionRect.left,
                                               cSubRegionRect.right);
            CSmilBasicRegion::resolveDimension(m_Rect.m_dTop,    m_Rect.m_eTopType,
                                               m_Rect.m_dBottom, m_Rect.m_eBottomType,
                                               m_Rect.m_dHeight, m_Rect.m_eHeightType,
                                               TRUE, HXxRECT_HEIGHT(cRect),
                                               cSubRegionRect.top,
                                               cSubRegionRect.bottom);
            // The calculation above was done in the space of the
            // region. The calculations below are done in the space
            // of the region's parent, so we need to offset the subregion
            // rect by the region's upper left corner.
            cSubRegionRect.left   += cRect.left;
            cSubRegionRect.top    += cRect.top;
            cSubRegionRect.right  += cRect.left;
            cSubRegionRect.bottom += cRect.top;
            // Now we need to compute the absolute coordinates
            // of the regPoint. Since the regPoint could be in
            // percentage values, and the size of the region
            // could be changing under animation, then we 
            // must recompute the absolute coordinates of the
            // regPoint every time. This regPoint is in the
            // space of the region's PARENT and not in the space
            // of the region's rect itself.
            HXxPoint cRegPoint = {0, 0};
            m_pDoc->computeRegPoint(cSubRegionRect,
                                    m_RegPoint,
                                    cRegPoint);
            // Now that we know the absolute coordinates
            // of the regPoint, then we can compute the 
            // media layout within the region rect. Note
            // that the following calculation takes place
            // in the coordinate space of the region's PARENT,
            // and not the region's rect itself.
            HXxRect  cMediaRect = {0, 0, 0, 0};
            retVal = m_pDoc->computeMediaLayout(cSubRegionRect,
                                                m_eFit,
                                                cRegPoint,
                                                m_RegPoint.m_eRegAlign,
                                                m_MediaSize,
                                                cMediaRect,
                                                m_bMediaIsBrush);
            if (SUCCEEDED(retVal))
            {
                // Now since the calculation of the media size was
                // done in the space of the region's PARENT, then
                // and we need to set the size of the media in the
                // coordinate space of the REGION, then we need
                // to translate the media rect to the coordinate
                // space of the region.
                cMediaRect.left   -= cRect.left;
                cMediaRect.top    -= cRect.top;
                cMediaRect.right  -= cRect.left;
                cMediaRect.bottom -= cRect.top;
                // So now the new width and height
                // can be calculated.
                newSize.cx = HXxRECT_WIDTH(cMediaRect);
                newSize.cy = HXxRECT_HEIGHT(cMediaRect);
                // If we have a resize behavior of Zoom, then
                // we compute everything off of the original root-layout
                // size, and then simply scale by the zoom factors.
                if ((m_dZoomScaleFactorX != 1.0 ||
                     m_dZoomScaleFactorY != 1.0) &&
                    m_eResizeBehavior == ResizeZoom)
                {
                    newSize.cx = (INT32) floor(m_dZoomScaleFactorX * ((double) newSize.cx) + 0.5);
                    newSize.cy = (INT32) floor(m_dZoomScaleFactorY * ((double) newSize.cy) + 0.5);
                }
                // Set the current media size to this value
                // XXXMEH - TODO is this actually used anywhere? We
                // should not really have a media size set into
                // the region object anywhere, since multiple
                // media can play to the same region
                pRegion->m_mediaSize = newSize;
                // As mentioned above, the renderers will usually 
                // call IHXSite::SetSize() when they are FIRST called
                // with IHXSite::AttachSite(). However, since renderers
                // don't have an idea of relative position to other renderers,
                // then they rarely call IHXSite::SetPosition(). Therefore,
                // if this is the first time through, we will need to explicitly
                // call IHXSite::SetPosition().
                if (bForceSetPosition)
                {
                    // Since we have a site watcher, then it
                    // doesn't matter what we pass in, the site
                    // watcher will change it to what it needs to
                    // be. So pass in some arbitrary position.
                    HXxPoint cPos = {1, 1};
                    if (m_pSite)
                    {
                        m_pSite->SetPosition(cPos);
                    }
                }
                // If this is a scrolling site, then set the flag
                if (m_eFit == FitScroll && m_pSite)
                {
                    IHXValues* pValues = NULL;
                    m_pSite->QueryInterface(IID_IHXValues, (void**) &pValues);
                    if (pValues)
                    {
                        pValues->SetPropertyULONG32("ScrollingSite", 1);
                    }
                    HX_RELEASE(pValues);
                }
            }
        }
    }

    MLOG_LAYOUT(NULL,
                "%lu\tChangingSize((%ld,%ld),(%ld,%ld)) m_id=%s m_SourceID=%s\n",
                HX_GET_BETTERTICKCOUNT(),
                oldSize.cx, oldSize.cy, newSize.cx, newSize.cy,
                (const char*) m_id,
                (const char*) m_SourceID);

    return retVal;
}