Grant Gilliam
63cf3026ff
Cross-platform research (Grant) flagged that the colour-border cue differs by app; checking the real brand colours against the detector found a concrete bug: the global 0.5 saturation threshold MISSES Teams' violet ring (#6264A7 ≈ 0.41, light variants ~0.27) entirely and Meet's lighter blue glow (#8ab4f8 ≈ 0.44). Those adapters would have detected nothing. - FrameSampler.saturatedPoints: add a tunable threshold + optional hue-band gate (degrees) so a lowered threshold doesn't pick up warm video. - GridCallAnalyzer.Config: colorSaturation / colorMinBrightness / colorHueRange, plumbed to the colour-border path (defaults preserve prior behaviour). - MeetAdapter sat→0.35 (catch the glow); TeamsAdapter sat→0.22 + hue 215–275° (catch the faint violet, reject other colours); ZoomAdapter sat 0.45 + hue 40–150° (vivid green/yellow). Values are first-pass pending real-fixture calibration; the hue gate is the main calibration lever. Tests: Teams now detects the faint violet ring and rejects a green one; Meet/Zoom vivid cases still pass. 27/27 XCTest.
49 lines
2.1 KiB
Swift
49 lines
2.1 KiB
Swift
import Foundation
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import CoreVideo
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/// Google Meet adapter (browser tab — capture is at the browser-window level).
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///
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/// Meet's active-speaker cue is a **coloured (Google-blue) ring/glow** around the
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/// speaking participant's tile, plus animated audio bars in the tile's mic chip.
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/// The participant **name sits in the tile's bottom-LEFT corner**, so the tile is
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/// estimated extending up and to the right of the name.
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///
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/// Detection *logic* is validated on synthetic frames; the geometry constants are a
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/// first pass and will be calibrated against real Meet screenshots. Meet runs in a
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/// browser, so there's no Accessibility name source we rely on — OCR only.
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struct MeetAdapter: AppAdapter {
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// Browsers that can host a Meet tab. The window, not the app, is what we capture;
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// CallDetector decides a browser window is a Meet call by its title.
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static let bundleIDs = [
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"com.google.Chrome", "org.mozilla.firefox", "com.apple.Safari",
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"company.thebrowser.Browser", "com.brave.Browser", "com.microsoft.edgemac",
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"com.google.Chrome.canary", "org.chromium.Chromium",
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]
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let adapterVersion = "meet-0.1.0"
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let preferredFPS = 3
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private let analyzer: GridCallAnalyzer
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init() {
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var config = GridCallAnalyzer.Config()
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config.nameAnchor = .bottomLeft
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config.detectColoredBorder = true // Google-blue speaking ring/glow
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config.detectWhiteBorder = false
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// The bright ring (#1a73e8) is ~0.89 sat but the lighter glow (#8ab4f8) is
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// ~0.44, below the 0.5 default — lower the threshold so the glow registers.
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config.colorSaturation = 0.35
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config.tileExpandX = 3.0
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config.tileExpandY = 5.0
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self.analyzer = GridCallAnalyzer(config: config)
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}
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func analyze(frame: CVPixelBuffer, at t: TimeInterval) -> [SpeakerObservation] {
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analyzer.analyze(pixelBuffer: frame, at: t)
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}
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// Exposed for fixture/synthetic tests.
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func analyze(cgImage: CGImage, at t: TimeInterval) -> [SpeakerObservation] {
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analyzer.analyze(cgImage: cgImage, at: t)
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}
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}
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