Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 9f3ddc119f3ec5ccf79bf50cc76d3e81f03b1cba
      
https://github.com/WebKit/WebKit/commit/9f3ddc119f3ec5ccf79bf50cc76d3e81f03b1cba
  Author: Jean-Yves Avenard <j...@apple.com>
  Date:   2023-12-14 (Thu, 14 Dec 2023)

  Changed paths:
    A 
LayoutTests/media/media-source/media-source-append-buffer-durationchange-expected.txt
    A 
LayoutTests/media/media-source/media-source-append-buffer-durationchange.html
    M 
Source/WebCore/platform/graphics/avfoundation/objc/MediaSourcePrivateAVFObjC.mm
    M 
Source/WebCore/platform/graphics/gstreamer/mse/MediaSourcePrivateGStreamer.cpp
    M Source/WebCore/platform/mock/mediasource/MockMediaSourcePrivate.cpp

  Log Message:
  -----------
  REGRESSION (271514@main): MSE Live playback fails on umediaserver.net
https://bugs.webkit.org/show_bug.cgi?id=266385
rdar://119615258

Reviewed by Jer Noble.

Changes in 271514@main exposed an underlying existing issue. The MediaSource's 
duration was initialised to NaN
but the GPU process one was initialised to 0. Following 271514@main the inital 
value would be identical.

If the media source duration was set prior any sourcebuffer being created, we 
wouldn't set the SourceBuffer
initial duration, and the step `If the media segment contains data beyond the 
current duration, then run the duration change algorithm with new duration set 
to the maximum of the current duration and the [[group end timestamp]].`
would always be skipped.

We set the initial duration to the sourceBuffer when created.

Add tests.

* 
LayoutTests/media/media-source/media-source-append-buffer-durationchange-expected.txt:
 Added.
* 
LayoutTests/media/media-source/media-source-append-buffer-durationchange.html: 
Added.
* 
Source/WebCore/platform/graphics/avfoundation/objc/MediaSourcePrivateAVFObjC.mm:
(WebCore::MediaSourcePrivateAVFObjC::addSourceBuffer):
* 
Source/WebCore/platform/graphics/gstreamer/mse/MediaSourcePrivateGStreamer.cpp:
(WebCore::MediaSourcePrivateGStreamer::addSourceBuffer):
* Source/WebCore/platform/mock/mediasource/MockMediaSourcePrivate.cpp:
(WebCore::MockMediaSourcePrivate::addSourceBuffer):

Canonical link: https://commits.webkit.org/272025@main


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