RESOLVED FIXED310616
MediaSource should actually cache the response 
https://bugs.webkit.org/show_bug.cgi?id=310616
Summary MediaSource should actually cache the response
Jean-Yves Avenard [:jya]
Reported 2026-03-24 02:13:27 PDT
AVStreamDataParserMIMETypeCache::canDecodeExtendedType just calls [AVStreamDataParser canParseExtendedMIMEType] to check if the type is supported or not and if not will call mediaStrategy()->canDecodeExtendedType which will issue a sync IPC call to the GPUP. the results of canDecodeExtendedType is never cached and so we end up making IPC sync call to the GPUP for all queries.
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Radar WebKit Bug Importer
Comment 1 2026-03-24 02:13:34 PDT
<rdar://problem/173224564>
Jean-Yves Avenard [:jya]
Comment 2 2026-03-25 02:44:21 PDT
Rename title, caching the entire lots of MediaSource.isTypeSupported makes more sense, it can be made thread-safe avoiding the sync dispatch to the main thread,
Jean-Yves Avenard [:jya]
Comment 3 2026-03-25 07:56:03 PDT
Pull request: https://github.com/WebKit/WebKit/pull/61328
EWS
Comment 4 2026-03-26 05:54:16 PDT
Committed 309981@main (877c1eacc4bb): <https://commits.webkit.org/309981@main> Reviewed commits have been landed. Closing PR #61328 and removing active labels.
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