Bug 259642

Summary:	MediaSession.setPositionState() does not allow duration Infinity
Product:	WebKit	Reporter:	Jakob Wierzba <webkit-bugzilla>
Component:	Media	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	ahmad.saleem792, jer.noble, webkit-bug-importer, youennf
Priority:	P2	Keywords:	InRadar
Version:	Safari 16
Hardware:	Mac (Apple Silicon)
OS:	macOS 13

Description Jakob Wierzba 2023-07-31 02:40:05 PDT

Per spec https://w3c.github.io/mediasession/#the-mediapositionstate-dictionary

> positive infinity can be used to indicate media without a defined end such as live playback

but when I do

navigator.mediaSession.setPositionState({ duration: Infinity })

I get a

> TypeError: The provided value is non-finite

Comment 1 Radar WebKit Bug Importer 2023-08-07 02:41:13 PDT

<rdar://problem/113493417>

Comment 2 Jer Noble 2023-08-10 12:48:52 PDT

This is (currently) intentional (and the spec text is confusing). The MediaSession specification defines `duration` to be a `double`, whereas the HTMLMediaElement.duration is defined as a `unrestricted double` (thus allowing +Infinity).

This issue was raised recently in the Media WG: <https://github.com/w3c/mediasession/issues/252>

We'll update the definition (to allow +Infinity) when the spec changes.

Comment 3 Ahmad Saleem 2024-01-30 15:35:06 PST

Web-Spec thread just got closed last week: https://github.com/w3c/mediasession/pull/304

with one follow-up: https://github.com/w3c/mediasession/issues/315