Bug 227865

Summary:	[MSE] SourceBuffer.appendState is only ever WaitingForSegment
Product:	WebKit	Reporter:	Jean-Yves Avenard [:jya] <jean-yves.avenard>
Component:	Media	Assignee:	Nobody <webkit-unassigned>
Status:	NEW
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Jean-Yves Avenard [:jya]

Reported 2021-07-11 20:04:14 PDT

Per MSE spec, a source buffer has a parsing state attribute that can be of any 3 values: WAITING_FOR_SEGMENT, PARSING_INIT_SEGMENT, PARSING_MEDIA_SEGMENT https://w3c.github.io/media-source/#sourcebuffer-segment-parser-loop This internal state is used to safeguard incorrectly calling SourceBuffer.setAppendMode [1] or modifying SourceBuffer.timeStampOffset [2] while we're in the middle of processing a media segment and to throw an exception if we are. https://w3c.github.io/media-source/#dom-sourcebuffer-mode https://w3c.github.io/media-source/#dom-sourcebuffer-timestampoffset However, in the current code, SourceBuffer::m_appendState is only ever set to AppendStateType::WaitingForSegment The state value should be updated in the Segment Parser Loop that is handled by SourceBufferPrivate but isn't.

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Radar WebKit Bug Importer

Comment 1 2021-07-11 20:04:33 PDT

<rdar://problem/80445668>

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