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Avoid the composited display path for our Metal layer

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This commit is contained in:
Cameron Gutman 2024-02-08 18:19:01 -06:00
parent 5bd0dea85d
commit 12624bc5c4
1 changed files with 12 additions and 2 deletions
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14
app/streaming/video/ffmpeg-renderers/vt.mm
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@ -638,10 +638,20 @@ public:
} }
} }
// Configure the Metal layer for rendering // Allow EDR content if we're streaming in a 10-bit format
m_MetalLayer.wantsExtendedDynamicRangeContent = !!(params->videoFormat & VIDEO_FORMAT_MASK_10BIT); m_MetalLayer.wantsExtendedDynamicRangeContent = !!(params->videoFormat & VIDEO_FORMAT_MASK_10BIT);
// Ideally, we don't actually want triple buffering due to increased
// latency since our render time is very short. However, we *need* 3
// drawables in order to hit the offloaded "direct" display path.
//
// If we only use 2 drawables, we'll be stuck in the composited path
// (particularly for windowed mode) and our latency will actually be
// higher than opting for triple buffering.
m_MetalLayer.maximumDrawableCount = 3;
// Allow tearing if V-Sync is off (also requires direct display path)
m_MetalLayer.displaySyncEnabled = params->enableVsync; m_MetalLayer.displaySyncEnabled = params->enableVsync;
m_MetalLayer.maximumDrawableCount = 2; // Double buffering
// Create the Metal texture cache for our CVPixelBuffers // Create the Metal texture cache for our CVPixelBuffers
CFStringRef keys[1] = { kCVMetalTextureUsage }; CFStringRef keys[1] = { kCVMetalTextureUsage };