47 bytes, text/x-phabricator-request
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STRs: 1. Open https://jsfiddle.net/jib1/j21wyx86/ and share screen Expected result: Screen sharing Actual result: Nightly: bp-4aeda29d-331a-44a6-b860-7e7410181220 Release: bp-49af8557-3334-4920-b373-079bb0181220 Divide by zero: #if !defined(_WIN32) const uint32_t processTime = ((uint32_t)(rtc::TimeNanos() - startProcessTime)) / rtc::kNumNanosecsPerMillisec; // Use at most x% CPU or limit framerate ->const uint32_t maxFPSNeeded = 1000 / _requestedCapability.maxFPS; Not a regression. Only tested on OSX. Found while writing wpt for bug 1321221. Hopefully a simple fix.
This clamps requests for FPS that are below 1 to 1. As far as I can tell, the getDisplayMedia specification does not provide any guidance on how to interpret negative or zero FPS constraints, so this seems like a reasonable limitation. I'm not adding a test here as there will be a wpt test that covers this as part of Bug 1321221.
Pushed by firstname.lastname@example.org: https://hg.mozilla.org/integration/autoland/rev/60f1310f5d25 Fix potential divide by zero in DesktopCaptureImpl; r=jib
Given that this is a longstanding issue, I don't think this needs to be tracked. That said, I'll happily entertain a Beta uplift request :)
Comment on attachment 9032705 [details] Bug 1515548 - Fix potential divide by zero in DesktopCaptureImpl; r=jib! [Beta/Release Uplift Approval Request] Feature/Bug causing the regression: None User impact if declined: Browser crash with divide by zero if user requests 0 FPS Is this code covered by automated tests?: Yes Has the fix been verified in Nightly?: Yes Needs manual test from QE?: No If yes, steps to reproduce: List of other uplifts needed: None Risk to taking this patch: Low Why is the change risky/not risky? (and alternatives if risky): Low risk because this adds code to handle zero and negative FPS. Positive FPS should be unaffected. String changes made/needed: None
Attachment #9032705 - Flags: approval-mozilla-beta?
Comment on attachment 9032705 [details] Bug 1515548 - Fix potential divide by zero in DesktopCaptureImpl; r=jib! [Triage Comment] Better edge case handling to reduce WebRTC crashes. Approved for 65.0b8.
Attachment #9032705 - Flags: approval-mozilla-beta? → approval-mozilla-beta+
(In reply to Dan Minor [:dminor] from comment #5) > Is this code covered by automated tests?: Yes > Has the fix been verified in Nightly?: Yes > Needs manual test from QE?: No Setting this as qe-verify-.
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