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Directly use the AVBufferSampleDisplayLayer as the rendering view's layer to increase efficiency

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This commit is contained in:
Cameron Gutman 2018-09-22 18:34:15 -07:00
parent 71b625081a
commit b1de66d878
1 changed files with 13 additions and 21 deletions
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34
app/streaming/video/ffmpeg-renderers/vt.mm
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@ -160,10 +160,20 @@ public:
// We need to add a subview for our display layer.
NSView* contentView = info.info.cocoa.window.contentView;
m_View = [[NSView alloc] initWithFrame:contentView.bounds];
m_View.wantsLayer = YES;
[contentView addSubview: m_View];
setupDisplayLayer();
m_DisplayLayer = [[AVSampleBufferDisplayLayer alloc] init];
m_DisplayLayer.bounds = m_View.bounds;
m_DisplayLayer.position = CGPointMake(CGRectGetMidX(m_View.bounds), CGRectGetMidY(m_View.bounds));
m_DisplayLayer.videoGravity = AVLayerVideoGravityResizeAspect;
// Create a layer-hosted view by setting the layer before wantsLayer
// This avoids us having to add our AVSampleBufferDisplayLayer as a
// sublayer of a layer-backed view which leaves a useless layer in
// the middle.
m_View.layer = m_DisplayLayer;
m_View.wantsLayer = YES;
[contentView addSubview: m_View];
err = av_hwdevice_ctx_create(&m_HwContext,
AV_HWDEVICE_TYPE_VIDEOTOOLBOX,
@ -210,24 +220,6 @@ public:
}
private:
void setupDisplayLayer()
{
CALayer* oldLayer = m_DisplayLayer;
m_DisplayLayer = [[AVSampleBufferDisplayLayer alloc] init];
m_DisplayLayer.bounds = m_View.bounds;
m_DisplayLayer.position = CGPointMake(CGRectGetMidX(m_View.bounds), CGRectGetMidY(m_View.bounds));
m_DisplayLayer.videoGravity = AVLayerVideoGravityResizeAspect;
CALayer* viewLayer = m_View.layer;
if (oldLayer != nil) {
[viewLayer replaceSublayer:oldLayer with:m_DisplayLayer];
}
else {
[viewLayer addSublayer:m_DisplayLayer];
}
}
AVBufferRef* m_HwContext;
AVSampleBufferDisplayLayer* m_DisplayLayer;
CMVideoFormatDescriptionRef m_FormatDesc;