C++ recorder函数代码示例

void SVGImagePainter::paint(const PaintInfo& paintInfo)
{
    if (paintInfo.phase != PaintPhaseForeground
        || m_layoutSVGImage.style()->visibility() == HIDDEN
        || !m_layoutSVGImage.imageResource()->hasImage())
        return;

    FloatRect boundingBox = m_layoutSVGImage.paintInvalidationRectInLocalCoordinates();
    if (!paintInfo.cullRect().intersectsCullRect(m_layoutSVGImage.localToParentTransform(), boundingBox))
        return;

    PaintInfo paintInfoBeforeFiltering(paintInfo);
    // Images cannot have children so do not call updateCullRect.
    TransformRecorder transformRecorder(paintInfoBeforeFiltering.context, m_layoutSVGImage, m_layoutSVGImage.localToParentTransform());
    {
        SVGPaintContext paintContext(m_layoutSVGImage, paintInfoBeforeFiltering);
        if (paintContext.applyClipMaskAndFilterIfNecessary() && !LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(paintContext.paintInfo().context, m_layoutSVGImage, paintContext.paintInfo().phase, LayoutPoint())) {
            LayoutObjectDrawingRecorder recorder(paintContext.paintInfo().context, m_layoutSVGImage, paintContext.paintInfo().phase, boundingBox, LayoutPoint());
            paintForeground(paintContext.paintInfo());
        }
    }

    if (m_layoutSVGImage.style()->outlineWidth()) {
        PaintInfo outlinePaintInfo(paintInfoBeforeFiltering);
        outlinePaintInfo.phase = PaintPhaseSelfOutlineOnly;
        ObjectPainter(m_layoutSVGImage).paintOutline(outlinePaintInfo, LayoutPoint(boundingBox.location()));
    }
}

void RenderSVGImage::layout()
{
    ASSERT(needsLayout());

    LayoutRectRecorder recorder(*this);
    LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this) && selfNeedsLayout());
    updateImageViewport();

    bool transformOrBoundariesUpdate = m_needsTransformUpdate || m_needsBoundariesUpdate;
    if (m_needsTransformUpdate) {
        m_localTransform = toSVGImageElement(element())->animatedLocalTransform();
        m_needsTransformUpdate = false;
    }

    if (m_needsBoundariesUpdate) {
        m_repaintBoundingBox = m_objectBoundingBox;
        SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBox);

        m_needsBoundariesUpdate = false;
    }

    // Invalidate all resources of this client if our layout changed.
    if (everHadLayout() && selfNeedsLayout())
        SVGResourcesCache::clientLayoutChanged(this);

    // If our bounds changed, notify the parents.
    if (transformOrBoundariesUpdate)
        RenderSVGModelObject::setNeedsBoundariesUpdate();

    repainter.repaintAfterLayout();
    clearNeedsLayout();
}

void TableCellPainter::paintBoxDecorationBackground(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
    if (!paintInfo.shouldPaintWithinRoot(&m_layoutTableCell))
        return;

    LayoutTable* table = m_layoutTableCell.table();
    if (!table->collapseBorders() && m_layoutTableCell.style()->emptyCells() == HIDE && !m_layoutTableCell.firstChild())
        return;

    bool needsToPaintBorder = m_layoutTableCell.styleRef().hasBorder() && !table->collapseBorders();
    if (!m_layoutTableCell.hasBackground() && !m_layoutTableCell.styleRef().boxShadow() && !needsToPaintBorder)
        return;

    LayoutRect paintRect = paintBounds(paintOffset, DoNotAddOffsetFromParent);
    LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutTableCell, DisplayItem::BoxDecorationBackground, pixelSnappedIntRect(paintRect));
    if (recorder.canUseCachedDrawing())
        return;

    BoxPainter::paintBoxShadow(paintInfo, paintRect, m_layoutTableCell.styleRef(), Normal);

    // Paint our cell background.
    paintBackgroundsBehindCell(paintInfo, paintOffset, &m_layoutTableCell);

    BoxPainter::paintBoxShadow(paintInfo, paintRect, m_layoutTableCell.styleRef(), Inset);

    if (!needsToPaintBorder)
        return;

    BoxPainter::paintBorder(m_layoutTableCell, paintInfo, paintRect, m_layoutTableCell.styleRef());
}

//
// Load images from network stream, run motion detection, write to MP4 files and trap and print notifications
// WARNING - This example can write lots of files, some large, to /tmp (or wherever configured)
//
int main( int argc, const char *argv[] )
{
    debugInitialise( "example9", "", 0 );

    Info( "Starting" );

    avInit();

    Application app;

    NetworkAVInput input( "input", "rtsp://170.93.143.139:1935/rtplive/0b01b57900060075004d823633235daa" );
    app.addThread( &input );

    MotionDetector motionDetector( "detector" );
    motionDetector.registerProvider( input );
    app.addThread( &motionDetector );

    VideoParms videoParms( 640, 480 );
    AudioParms audioParms;
    VideoRecorder recorder( "recorder" , "/transfer", "mp4", videoParms, audioParms );
    //MovieFileOutput recorder( "recorder" , "/tmp", "mp4", 300, videoParms, audioParms );
    recorder.registerProvider( motionDetector );
    app.addThread( &recorder );

    NotifyOutput notifier( "notifier" );
    notifier.registerProvider( recorder );
    app.addThread( &notifier );

    app.run();
}

void ScrollbarThemeNonMacCommon::paintTickmarks(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect)
{
    if (scrollbar->orientation() != VerticalScrollbar)
        return;

    if (rect.height() <= 0 || rect.width() <= 0)
        return;

    // Get the tickmarks for the frameview.
    Vector<IntRect> tickmarks;
    scrollbar->getTickmarks(tickmarks);
    if (!tickmarks.size())
        return;

    if (DrawingRecorder::useCachedDrawingIfPossible(*context, *scrollbar, DisplayItem::ScrollbarTickmarks))
        return;

    DrawingRecorder recorder(*context, *scrollbar, DisplayItem::ScrollbarTickmarks, rect);
    GraphicsContextStateSaver stateSaver(*context);
    context->setShouldAntialias(false);

    for (Vector<IntRect>::const_iterator i = tickmarks.begin(); i != tickmarks.end(); ++i) {
        // Calculate how far down (in %) the tick-mark should appear.
        const float percent = static_cast<float>(i->y()) / scrollbar->totalSize();

        // Calculate how far down (in pixels) the tick-mark should appear.
        const int yPos = rect.y() + (rect.height() * percent);

        FloatRect tickRect(rect.x(), yPos, rect.width(), 3);
        context->fillRect(tickRect, Color(0xCC, 0xAA, 0x00, 0xFF));

        FloatRect tickStroke(rect.x(), yPos + 1, rect.width(), 1);
        context->fillRect(tickStroke, Color(0xFF, 0xDD, 0x00, 0xFF));
    }
}

DEF_TEST(RecordOpts_SaveSaveLayerRestoreRestore, r) {
    SkRecord record;
    SkRecorder recorder(&record, W, H);

    // A previous bug NoOp'd away the first 3 commands.
    recorder.save();
    recorder.saveLayer(NULL, NULL);
    recorder.restore();
    recorder.restore();

    SkRecordNoopSaveRestores(&record);
    switch (record.count()) {
    case 4:
        assert_type<SkRecords::Save>     (r, record, 0);
        assert_type<SkRecords::SaveLayer>(r, record, 1);
        assert_type<SkRecords::Restore>  (r, record, 2);
        assert_type<SkRecords::Restore>  (r, record, 3);
        break;
    case 2:
        assert_type<SkRecords::SaveLayer>(r, record, 0);
        assert_type<SkRecords::Restore>  (r, record, 1);
        break;
    case 0:
        break;
    default:
        REPORTER_ASSERT(r, false);
    }
}

int main() {
  try {
    // An actual myo::Hub; NOT a MyoSim::Hub.
    myo::Hub hub("com.voidingwarranties.myo-simulator-example");
    myo::Myo* myo = hub.waitForMyo(10000);
    if (!myo) {
      throw std::runtime_error("Unable to find a Myo!");
    }
    // Record only pose events.
    MyoSim::EventRecorder recorder(MyoSim::EventRecorder::POSE);
    hub.addListener(&recorder);
    // Record for 5 seconds.
    myo->unlock(myo::Myo::unlockHold);
    hub.run(5000);
    myo->lock();

    std::cout << "Events recorded. Press ENTER to replay events.";
    getchar();

    MyoSim::Hub simulated_hub;
    PrintListener print_listener;
    simulated_hub.addListener(&print_listener);
    MyoSim::EventPlayer player(simulated_hub);
    player.play(recorder.getEventSession());

  } catch (const std::exception& ex) {
    std::cerr << "Error: " << ex.what() << std::endl;
    return 1;
  }
  return 0;
}

/*!
   Calculate the painter path for a styled or rounded border

   When the canvas has no styled background or rounded borders
   the painter path is empty.

   \param rect Bounding rectangle of the canvas
   \return Painter path, that can be used for clipping
*/
QPainterPath QwtPlotCanvas::borderPath( const QRect &rect ) const
{
    if ( testAttribute(Qt::WA_StyledBackground ) )
    {
        QwtStyleSheetRecorder recorder( rect.size() );

        QPainter painter( &recorder );

        QStyleOption opt;
        opt.initFrom(this);
        opt.rect = rect;
        style()->drawPrimitive( QStyle::PE_Widget, &opt, &painter, this);

        painter.end();

        if ( !recorder.background.path.isEmpty() )
            return recorder.background.path;

        if ( !recorder.border.rectList.isEmpty() )
            return qwtCombinePathList( rect, recorder.border.pathList );
    }
    else if ( d_data->borderRadius > 0.0 )
    {
        double fw2 = frameWidth() * 0.5;
        QRectF r = QRectF(rect).adjusted( fw2, fw2, -fw2, -fw2 );

        QPainterPath path;
        path.addRoundedRect( r, d_data->borderRadius, d_data->borderRadius );
        return path;
    }
    
    return QPainterPath();
}

void InlineFlowBoxPainter::paintBoxDecorationBackground(const PaintInfo& paintInfo, const LayoutPoint& paintOffset, const LayoutRect& cullRect)
{
    ASSERT(paintInfo.phase == PaintPhaseForeground);
    if (!paintInfo.shouldPaintWithinRoot(&m_inlineFlowBox.layoutObject()) || m_inlineFlowBox.layoutObject().style()->visibility() != VISIBLE)
        return;

    // You can use p::first-line to specify a background. If so, the root line boxes for
    // a line may actually have to paint a background.
    const ComputedStyle* styleToUse = m_inlineFlowBox.layoutObject().style(m_inlineFlowBox.isFirstLineStyle());
    bool shouldPaintBoxDecorationBackground;
    if (m_inlineFlowBox.parent())
        shouldPaintBoxDecorationBackground = m_inlineFlowBox.layoutObject().hasBoxDecorationBackground();
    else
        shouldPaintBoxDecorationBackground = m_inlineFlowBox.isFirstLineStyle() && styleToUse != m_inlineFlowBox.layoutObject().style();

    if (!shouldPaintBoxDecorationBackground)
        return;

    if (DrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_inlineFlowBox, DisplayItem::BoxDecorationBackground))
        return;

    DrawingRecorder recorder(*paintInfo.context, m_inlineFlowBox, DisplayItem::BoxDecorationBackground, pixelSnappedIntRect(cullRect));

    LayoutRect frameRect = roundedFrameRectClampedToLineTopAndBottomIfNeeded();

    // Move x/y to our coordinates.
    LayoutRect localRect(frameRect);
    m_inlineFlowBox.flipForWritingMode(localRect);
    LayoutPoint adjustedPaintOffset = paintOffset + localRect.location();

    LayoutRect adjustedFrameRect = LayoutRect(adjustedPaintOffset, frameRect.size());

    LayoutRect adjustedClipRect;
    BorderPaintingType borderPaintingType = getBorderPaintType(adjustedFrameRect, adjustedClipRect);

    // Shadow comes first and is behind the background and border.
    if (!m_inlineFlowBox.deprecatedBoxModelObject()->boxShadowShouldBeAppliedToBackground(BackgroundBleedNone, &m_inlineFlowBox))
        paintBoxShadow(paintInfo, *styleToUse, Normal, adjustedFrameRect);

    Color backgroundColor = m_inlineFlowBox.layoutObject().resolveColor(*styleToUse, CSSPropertyBackgroundColor);
    paintFillLayers(paintInfo, backgroundColor, styleToUse->backgroundLayers(), adjustedFrameRect);
    paintBoxShadow(paintInfo, *styleToUse, Inset, adjustedFrameRect);

    switch (borderPaintingType) {
    case DontPaintBorders:
        break;
    case PaintBordersWithoutClip:
        BoxPainter::paintBorder(*m_inlineFlowBox.deprecatedBoxModelObject(), paintInfo, adjustedFrameRect, m_inlineFlowBox.layoutObject().styleRef(m_inlineFlowBox.isFirstLineStyle()),
            BackgroundBleedNone, m_inlineFlowBox.includeLogicalLeftEdge(), m_inlineFlowBox.includeLogicalRightEdge());
        break;
    case PaintBordersWithClip:
        // FIXME: What the heck do we do with RTL here? The math we're using is obviously not right,
        // but it isn't even clear how this should work at all.
        LayoutRect imageStripPaintRect = paintRectForImageStrip(adjustedPaintOffset, frameRect.size(), LTR);
        GraphicsContextStateSaver stateSaver(*paintInfo.context);
        paintInfo.context->clip(adjustedClipRect);
        BoxPainter::paintBorder(*m_inlineFlowBox.deprecatedBoxModelObject(), paintInfo, imageStripPaintRect, m_inlineFlowBox.layoutObject().styleRef(m_inlineFlowBox.isFirstLineStyle()));
        break;
    }
}

void TableCellPainter::paintBoxDecorationBackground(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
    if (!paintInfo.shouldPaintWithinRoot(&m_renderTableCell))
        return;

    RenderTable* tableElt = m_renderTableCell.table();
    if (!tableElt->collapseBorders() && m_renderTableCell.style()->emptyCells() == HIDE && !m_renderTableCell.firstChild())
        return;

    LayoutRect paintRect = paintBounds(paintOffset, DoNotAddOffsetFromParent);
    RenderDrawingRecorder recorder(paintInfo.context, m_renderTableCell, paintInfo.phase, pixelSnappedIntRect(paintRect));
    if (recorder.canUseCachedDrawing())
        return;

    BoxPainter::paintBoxShadow(paintInfo, paintRect, m_renderTableCell.style(), Normal);

    // Paint our cell background.
    paintBackgroundsBehindCell(paintInfo, paintOffset, &m_renderTableCell);

    BoxPainter::paintBoxShadow(paintInfo, paintRect, m_renderTableCell.style(), Inset);

    if (!m_renderTableCell.style()->hasBorder() || tableElt->collapseBorders())
        return;

    BoxPainter::paintBorder(m_renderTableCell, paintInfo, paintRect, m_renderTableCell.style());
}

void FieldsetPainter::paintMask(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
    if (m_layoutFieldset.style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask)
        return;

    LayoutRect paintRect = LayoutRect(paintOffset, m_layoutFieldset.size());
    LayoutBox* legend = m_layoutFieldset.findInFlowLegend();
    if (!legend)
        return BoxPainter(m_layoutFieldset).paintMask(paintInfo, paintOffset);

    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(paintInfo.context, m_layoutFieldset, paintInfo.phase, paintOffset))
        return;

    // FIXME: We need to work with "rl" and "bt" block flow directions.  In those
    // cases the legend is embedded in the right and bottom borders respectively.
    // https://bugs.webkit.org/show_bug.cgi?id=47236
    if (m_layoutFieldset.style()->isHorizontalWritingMode()) {
        LayoutUnit yOff = (legend->location().y() > LayoutUnit()) ? LayoutUnit() : (legend->size().height() - m_layoutFieldset.borderTop()) / 2;
        paintRect.expand(LayoutUnit(), -yOff);
        paintRect.move(LayoutUnit(), yOff);
    } else {
        LayoutUnit xOff = (legend->location().x() > LayoutUnit()) ? LayoutUnit() : (legend->size().width() - m_layoutFieldset.borderLeft()) / 2;
        paintRect.expand(-xOff, LayoutUnit());
        paintRect.move(xOff, LayoutUnit());
    }

    LayoutObjectDrawingRecorder recorder(paintInfo.context, m_layoutFieldset, paintInfo.phase, paintRect, paintOffset);
    BoxPainter(m_layoutFieldset).paintMaskImages(paintInfo, paintRect);
}

void RenderSVGShape::layout()
{
    LayoutRectRecorder recorder(*this);
    LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this) && selfNeedsLayout());

    bool updateCachedBoundariesInParents = false;

    if (m_needsShapeUpdate || m_needsBoundariesUpdate) {
        updateShapeFromElement();
        m_needsShapeUpdate = false;
        updateRepaintBoundingBox();
        m_needsBoundariesUpdate = false;
        updateCachedBoundariesInParents = true;
    }

    if (m_needsTransformUpdate) {
        m_localTransform =  toSVGGraphicsElement(element())->animatedLocalTransform();
        m_needsTransformUpdate = false;
        updateCachedBoundariesInParents = true;
    }

    // Invalidate all resources of this client if our layout changed.
    if (everHadLayout() && selfNeedsLayout())
        SVGResourcesCache::clientLayoutChanged(this);

    // If our bounds changed, notify the parents.
    if (updateCachedBoundariesInParents)
        RenderSVGModelObject::setNeedsBoundariesUpdate();

    repainter.repaintAfterLayout();
    clearNeedsLayout();
}

int MultiPlayer::Record(const std::string &fileName, int channel, int time)
{
	LOGD("Record with name %s channel %d time %d", fileName.c_str(), channel, time);
	if (fileName.length() == 0 || channel < 0 ||
		channel >= (int)mplayerList.size() || time < 0) {
		LOGE("Record: Illegal argument");
		return -1;
	}

	// find player
	shared_ptr<OnePlayer> onePlayer;
	for (auto iter = this->mplayerList.begin(); iter != mplayerList.end(); iter++)
		if ((*iter)->mid == channel)
			onePlayer = *iter;
	if (NULL == onePlayer.get()) {
		LOGE("Cannot find player by id: %d", channel);
		return -1;
	}

	// start record TODO fix hard code
	shared_ptr<Recorder> recorder(new Recorder(onePlayer->mplayer));
	int res = recorder->Start(fileName + ".mp4", time);
	if (0 != res) {
		LOGE("Start record failed: %d", res);
		return res;
	}

	mrecorderList.push_back(recorder);
	return 0;
}

void SVGInlineTextBoxPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
    ASSERT(paintInfo.shouldPaintWithinRoot(&m_svgInlineTextBox.layoutObject()));
    ASSERT(paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection);
    ASSERT(m_svgInlineTextBox.truncation() == cNoTruncation);

    if (m_svgInlineTextBox.layoutObject().style()->visibility() != VISIBLE)
        return;

    // We're explicitly not supporting composition & custom underlines and custom highlighters -- unlike InlineTextBox.
    // If we ever need that for SVG, it's very easy to refactor and reuse the code.

    if (paintInfo.phase == PaintPhaseSelection && !shouldPaintSelection())
        return;

    LayoutSVGInlineText& textLayoutObject = toLayoutSVGInlineText(m_svgInlineTextBox.layoutObject());
    if (!textShouldBePainted(textLayoutObject))
        return;

    DisplayItem::Type displayItemType = DisplayItem::paintPhaseToDrawingType(paintInfo.phase);
    if (!DrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_svgInlineTextBox, displayItemType)) {
        LayoutObject& parentLayoutObject = m_svgInlineTextBox.parent()->layoutObject();
        const ComputedStyle& style = parentLayoutObject.styleRef();

        DrawingRecorder recorder(*paintInfo.context, m_svgInlineTextBox, displayItemType, paintInfo.rect);
        InlineTextBoxPainter(m_svgInlineTextBox).paintDocumentMarkers(
            paintInfo.context, paintOffset, style,
            textLayoutObject.scaledFont(), true);

        if (!m_svgInlineTextBox.textFragments().isEmpty())
            paintTextFragments(paintInfo, parentLayoutObject);
    }
}

static void paintFilteredContent(GraphicsContext& context,
                                 const LayoutObject& object,
                                 FilterData* filterData) {
  if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(
          context, object, DisplayItem::kSVGFilter))
    return;

  FloatRect filterBounds =
      filterData ? filterData->lastEffect->getFilter()->filterRegion()
                 : FloatRect();
  LayoutObjectDrawingRecorder recorder(context, object, DisplayItem::kSVGFilter,
                                       filterBounds);
  if (!filterData || filterData->m_state != FilterData::ReadyToPaint)
    return;
  DCHECK(filterData->lastEffect->getFilter()->getSourceGraphic());

  filterData->m_state = FilterData::PaintingFilter;

  FilterEffect* lastEffect = filterData->lastEffect;
  sk_sp<SkImageFilter> imageFilter =
      SkiaImageFilterBuilder::build(lastEffect, ColorSpaceDeviceRGB);
  context.save();

  // Clip drawing of filtered image to the minimum required paint rect.
  context.clipRect(lastEffect->mapRect(object.strokeBoundingBox()));

  context.beginLayer(1, SkXfermode::kSrcOver_Mode, &filterBounds,
                     ColorFilterNone, std::move(imageFilter));
  context.endLayer();
  context.restore();

  filterData->m_state = FilterData::ReadyToPaint;
}