Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 454d2c90e3ecdbcddf21c2457422ae71fb702c3d
      
https://github.com/WebKit/WebKit/commit/454d2c90e3ecdbcddf21c2457422ae71fb702c3d
  Author: Jean-Yves Avenard <[email protected]>
  Date:   2025-11-26 (Wed, 26 Nov 2025)

  Changed paths:
    A 
LayoutTests/media/media-source/media-source-changetype-vp8-vp9-expected.txt
    A LayoutTests/media/media-source/media-source-changetype-vp8-vp9.html
    M LayoutTests/platform/glib/TestExpectations
    M LayoutTests/platform/mac-wk1/TestExpectations
    M Source/WebCore/platform/graphics/cocoa/WebCoreDecompressionSession.mm

  Log Message:
  -----------
  [MSE] WebCoreDecompressionSession will error when going from a VideoDecoder 
to a VTDecompressionSession
https://bugs.webkit.org/show_bug.cgi?id=303124
rdar://165427008

Reviewed by Youenn Fablet.

Detect video FormatDescription change when a WebCodec's VideoDecoder is in
use and reset decoder if needed.

Test: media/media-source/media-source-changetype-vp8-vp9.html

* LayoutTests/media/media-source/media-source-changetype-vp8-vp9-expected.txt: 
Added.
* LayoutTests/media/media-source/media-source-changetype-vp8-vp9.html: Added.
* LayoutTests/platform/glib/TestExpectations: webkit.org/b/303124 invalid 
currentTime at the end.
* LayoutTests/platform/mac-wk1/TestExpectations: wk1 doesn't support MSE webm
* Source/WebCore/platform/graphics/cocoa/WebCoreDecompressionSession.mm:
(WebCore::WebCoreDecompressionSession::ensureDecompressionSessionForSample):

Canonical link: https://commits.webkit.org/303581@main



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