<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>222462</bug_id>
          
          <creation_ts>2021-02-26 00:06:53 -0800</creation_ts>
          <short_desc>[REGRESSION] [MSE] WebContent/GPU process will hang when appending data under some circumstances.</short_desc>
          <delta_ts>2021-02-26 16:32:21 -0800</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>Media</component>
          <version>WebKit Nightly Build</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          <see_also>https://bugs.webkit.org/show_bug.cgi?id=222422</see_also>
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Jean-Yves Avenard [:jya]">jean-yves.avenard</reporter>
          <assigned_to name="Jean-Yves Avenard [:jya]">jean-yves.avenard</assigned_to>
          <cc>calvaris</cc>
    
    <cc>cgarcia</cc>
    
    <cc>eric.carlson</cc>
    
    <cc>ews-watchlist</cc>
    
    <cc>glenn</cc>
    
    <cc>gustavo</cc>
    
    <cc>jer.noble</cc>
    
    <cc>menard</cc>
    
    <cc>philipj</cc>
    
    <cc>pnormand</cc>
    
    <cc>sergio</cc>
    
    <cc>vjaquez</cc>
    
    <cc>webkit-bug-importer</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1733685</commentid>
    <comment_count>0</comment_count>
    <who name="Jean-Yves Avenard [:jya]">jean-yves.avenard</who>
    <bug_when>2021-02-26 00:06:53 -0800</bug_when>
    <thetext>[REGRESSION] [MSE] WebContent/GPU process will hang when appending data under some circumstances.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1733686</commentid>
    <comment_count>1</comment_count>
    <who name="Jean-Yves Avenard [:jya]">jean-yves.avenard</who>
    <bug_when>2021-02-26 00:07:48 -0800</bug_when>
    <thetext>rdar://74748843</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1733688</commentid>
    <comment_count>2</comment_count>
      <attachid>421620</attachid>
    <who name="Jean-Yves Avenard [:jya]">jean-yves.avenard</who>
    <bug_when>2021-02-26 00:20:05 -0800</bug_when>
    <thetext>Created attachment 421620
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1733959</commentid>
    <comment_count>3</comment_count>
      <attachid>421620</attachid>
    <who name="Jer Noble">jer.noble</who>
    <bug_when>2021-02-26 13:32:46 -0800</bug_when>
    <thetext>Comment on attachment 421620
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=421620&amp;action=review

&gt; Source/WebCore/platform/MediaSample.h:76
&gt; -    virtual std::pair&lt;RefPtr&lt;MediaSample&gt;, RefPtr&lt;MediaSample&gt;&gt; divide(const MediaTime&amp; presentationTime) = 0;
&gt; +    virtual std::pair&lt;RefPtr&lt;MediaSample&gt;, RefPtr&lt;MediaSample&gt;&gt; divide(const MediaTime&amp; presentationTime, bool useEndTime = false) = 0;

Here...

&gt; Source/WebCore/platform/graphics/SourceBufferPrivate.cpp:1020
&gt; +                    replacementSamples = replacementSamples.second-&gt;divide(m_appendWindowEnd, true /* useEndTime */);

And here:

Rather than have a comment indicate the meaning of &quot;true&quot; in this case, something we&apos;ve done elsewhere is:

enum class UseEndTime : bool { 
  DoNotUse,
  Use,
};

and: 

virtual std::pair&lt;RefPtr&lt;MediaSample&gt;, RefPtr&lt;MediaSample&gt;&gt; divide(const MediaTime&amp; presentationTime, UseEndTime = UseEndTime::DoNotUse);

and:

replacementSamples = replacementSamples.second-&gt;divide(m_appendWindowEnd, UseEndTime::Use);</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1733962</commentid>
    <comment_count>4</comment_count>
      <attachid>421620</attachid>
    <who name="Eric Carlson">eric.carlson</who>
    <bug_when>2021-02-26 13:35:54 -0800</bug_when>
    <thetext>Comment on attachment 421620
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=421620&amp;action=review

&gt; Source/WebCore/platform/graphics/SourceBufferPrivate.cpp:1020
&gt; +                    replacementSamples = replacementSamples.second-&gt;divide(m_appendWindowEnd, true /* useEndTime */);

Please define and use an enum here instead of a bool

&gt; Source/WebCore/platform/graphics/avfoundation/objc/MediaSampleAVFObjC.h:64
&gt; +    std::pair&lt;RefPtr&lt;MediaSample&gt;, RefPtr&lt;MediaSample&gt;&gt; divide(const MediaTime&amp; presentationTime, bool useEndTime) override;

s/override/final/

&gt; Source/WebCore/platform/graphics/gstreamer/MediaSampleGStreamer.h:53
&gt; +    std::pair&lt;RefPtr&lt;MediaSample&gt;, RefPtr&lt;MediaSample&gt;&gt; divide(const MediaTime&amp;, bool) override  { return { nullptr, nullptr }; }

Ditto.

&gt; Source/WebCore/platform/mock/mediasource/MockSourceBufferPrivate.cpp:71
&gt; +    std::pair&lt;RefPtr&lt;MediaSample&gt;, RefPtr&lt;MediaSample&gt;&gt; divide(const MediaTime&amp;, bool) override { return {nullptr, nullptr}; }

Ditto.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1733977</commentid>
    <comment_count>5</comment_count>
      <attachid>421707</attachid>
    <who name="Jean-Yves Avenard [:jya]">jean-yves.avenard</who>
    <bug_when>2021-02-26 14:26:33 -0800</bug_when>
    <thetext>Created attachment 421707
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1733981</commentid>
    <comment_count>6</comment_count>
      <attachid>421707</attachid>
    <who name="Jer Noble">jer.noble</who>
    <bug_when>2021-02-26 14:35:53 -0800</bug_when>
    <thetext>Comment on attachment 421707
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=421707&amp;action=review

r=me, with nits before landing:

&gt; Source/WebCore/platform/MediaSample.h:79
&gt; +    enum class UseEndTime : bool {
&gt; +      DoNotUse,
&gt; +      Use,
&gt; +    };

StyleBot is complaining that the enum values aren&apos;t indented correctly.

&gt; Source/WebCore/platform/graphics/avfoundation/objc/MediaSampleAVFObjC.h:64
&gt; -    std::pair&lt;RefPtr&lt;MediaSample&gt;, RefPtr&lt;MediaSample&gt;&gt; divide(const MediaTime&amp; presentationTime) override;
&gt; +    std::pair&lt;RefPtr&lt;MediaSample&gt;, RefPtr&lt;MediaSample&gt;&gt; divide(const MediaTime&amp; presentationTime, UseEndTime useEndTime) override;

StyleBot is complaining that the parameter name isn&apos;t needed here.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1734047</commentid>
    <comment_count>7</comment_count>
      <attachid>421719</attachid>
    <who name="Jean-Yves Avenard [:jya]">jean-yves.avenard</who>
    <bug_when>2021-02-26 15:52:53 -0800</bug_when>
    <thetext>Created attachment 421719
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1734066</commentid>
    <comment_count>8</comment_count>
    <who name="EWS">ews-feeder</who>
    <bug_when>2021-02-26 16:32:18 -0800</bug_when>
    <thetext>Committed r273604: &lt;https://commits.webkit.org/r273604&gt;

All reviewed patches have been landed. Closing bug and clearing flags on attachment 421719.</thetext>
  </long_desc>
      
          <attachment
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              isprivate="0"
          >
            <attachid>421620</attachid>
            <date>2021-02-26 00:20:05 -0800</date>
            <delta_ts>2021-02-26 14:26:29 -0800</delta_ts>
            <desc>Patch</desc>
            <filename>bug-222462-20210226192004.patch</filename>
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            <attacher name="Jean-Yves Avenard [:jya]">jean-yves.avenard</attacher>
            
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          </attachment>
          <attachment
              isobsolete="1"
              ispatch="1"
              isprivate="0"
          >
            <attachid>421707</attachid>
            <date>2021-02-26 14:26:33 -0800</date>
            <delta_ts>2021-02-26 15:52:49 -0800</delta_ts>
            <desc>Patch</desc>
            <filename>bug-222462-20210227092632.patch</filename>
            <type>text/plain</type>
            <size>11034</size>
            <attacher name="Jean-Yves Avenard [:jya]">jean-yves.avenard</attacher>
            
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          </attachment>
          <attachment
              isobsolete="0"
              ispatch="1"
              isprivate="0"
          >
            <attachid>421719</attachid>
            <date>2021-02-26 15:52:53 -0800</date>
            <delta_ts>2021-02-26 16:32:20 -0800</delta_ts>
            <desc>Patch</desc>
            <filename>bug-222462-20210227105252.patch</filename>
            <type>text/plain</type>
            <size>11017</size>
            <attacher name="Jean-Yves Avenard [:jya]">jean-yves.avenard</attacher>
            
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          </attachment>
      

    </bug>

</bugzilla>