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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/277433">277433</a></dd>
<dt>Author</dt> <dd>peng.liu6@apple.com</dd>
<dt>Date</dt> <dd>2021-05-13 07:12:22 -0700 (Thu, 13 May 2021)</dd>
</dl>
<h3>Log Message</h3>
<pre>Subtitles in Safari fail to appear after switching language
https://bugs.webkit.org/show_bug.cgi?id=225738
Reviewed by Jer Noble.
`TextTrackPrivateRemote::setMode()` calls `InbandTextTrackPrivate::setMode()`, but
it does not set the value of `TextTrackPrivateRemote::mode` properly. Therefore,
`TextTrackPrivateRemote::mode` will always be `Disabled`. When we switch text track
in the WebContent process side, we will only send the IPC message `TextTrackSetMode`
to `RemoteMediaPlayerProxy` in the GPU process to change the mode from `Disabled`
to `Showing`, but cannot change its value back to `Disabled`. When a user keeps
switching text track, all text tracks in the GPU process will become `Showing`,
and `MediaPlayerPrivateAVFoundation` cannot deal with that. As a result,
the WebContent process won't get the correct subtitles from the GPU process.
`cueFormat()` has the similar issue, it does not impact the functionality though.
Actually, `TextTrackPrivateRemote` can simply use the implementations of its
base class `InbandTextTrackPrivate` regarding mode and cue format.
In addition, `TextTrackPrivateRemote` does not need to get the "mode" value from
`RemoteTextTrackProxy` in the GPU process. So this patch removes the `mode` attribute
of `TextTrackPrivateRemoteConfiguration`.
* GPUProcess/media/RemoteTextTrackProxy.cpp:
(WebKit::RemoteTextTrackProxy::configuration):
* GPUProcess/media/TextTrackPrivateRemoteConfiguration.h:
(WebKit::TextTrackPrivateRemoteConfiguration::encode const):
(WebKit::TextTrackPrivateRemoteConfiguration::decode):
* WebProcess/GPU/media/TextTrackPrivateRemote.cpp:
(WebKit::TextTrackPrivateRemote::setMode):
(WebKit::TextTrackPrivateRemote::updateConfiguration):
* WebProcess/GPU/media/TextTrackPrivateRemote.h:</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebKitChangeLog">trunk/Source/WebKit/ChangeLog</a></li>
<li><a href="#trunkSourceWebKitGPUProcessmediaRemoteTextTrackProxycpp">trunk/Source/WebKit/GPUProcess/media/RemoteTextTrackProxy.cpp</a></li>
<li><a href="#trunkSourceWebKitGPUProcessmediaTextTrackPrivateRemoteConfigurationh">trunk/Source/WebKit/GPUProcess/media/TextTrackPrivateRemoteConfiguration.h</a></li>
<li><a href="#trunkSourceWebKitWebProcessGPUmediaTextTrackPrivateRemotecpp">trunk/Source/WebKit/WebProcess/GPU/media/TextTrackPrivateRemote.cpp</a></li>
<li><a href="#trunkSourceWebKitWebProcessGPUmediaTextTrackPrivateRemoteh">trunk/Source/WebKit/WebProcess/GPU/media/TextTrackPrivateRemote.h</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebKitChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit/ChangeLog (277432 => 277433)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit/ChangeLog 2021-05-13 13:54:43 UTC (rev 277432)
+++ trunk/Source/WebKit/ChangeLog 2021-05-13 14:12:22 UTC (rev 277433)
</span><span class="lines">@@ -1,3 +1,38 @@
</span><ins>+2021-05-13 Peng Liu <peng.liu6@apple.com>
+
+ Subtitles in Safari fail to appear after switching language
+ https://bugs.webkit.org/show_bug.cgi?id=225738
+
+ Reviewed by Jer Noble.
+
+ `TextTrackPrivateRemote::setMode()` calls `InbandTextTrackPrivate::setMode()`, but
+ it does not set the value of `TextTrackPrivateRemote::mode` properly. Therefore,
+ `TextTrackPrivateRemote::mode` will always be `Disabled`. When we switch text track
+ in the WebContent process side, we will only send the IPC message `TextTrackSetMode`
+ to `RemoteMediaPlayerProxy` in the GPU process to change the mode from `Disabled`
+ to `Showing`, but cannot change its value back to `Disabled`. When a user keeps
+ switching text track, all text tracks in the GPU process will become `Showing`,
+ and `MediaPlayerPrivateAVFoundation` cannot deal with that. As a result,
+ the WebContent process won't get the correct subtitles from the GPU process.
+ `cueFormat()` has the similar issue, it does not impact the functionality though.
+
+ Actually, `TextTrackPrivateRemote` can simply use the implementations of its
+ base class `InbandTextTrackPrivate` regarding mode and cue format.
+
+ In addition, `TextTrackPrivateRemote` does not need to get the "mode" value from
+ `RemoteTextTrackProxy` in the GPU process. So this patch removes the `mode` attribute
+ of `TextTrackPrivateRemoteConfiguration`.
+
+ * GPUProcess/media/RemoteTextTrackProxy.cpp:
+ (WebKit::RemoteTextTrackProxy::configuration):
+ * GPUProcess/media/TextTrackPrivateRemoteConfiguration.h:
+ (WebKit::TextTrackPrivateRemoteConfiguration::encode const):
+ (WebKit::TextTrackPrivateRemoteConfiguration::decode):
+ * WebProcess/GPU/media/TextTrackPrivateRemote.cpp:
+ (WebKit::TextTrackPrivateRemote::setMode):
+ (WebKit::TextTrackPrivateRemote::updateConfiguration):
+ * WebProcess/GPU/media/TextTrackPrivateRemote.h:
+
</ins><span class="cx"> 2021-05-13 Carlos Garcia Campos <cgarcia@igalia.com>
</span><span class="cx">
</span><span class="cx"> REGRESSION(r277262): test imported/w3c/web-platform-tests/css/selectors/focus-visible-002.html is crashing
</span></span></pre></div>
<a id="trunkSourceWebKitGPUProcessmediaRemoteTextTrackProxycpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit/GPUProcess/media/RemoteTextTrackProxy.cpp (277432 => 277433)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit/GPUProcess/media/RemoteTextTrackProxy.cpp 2021-05-13 13:54:43 UTC (rev 277432)
+++ trunk/Source/WebKit/GPUProcess/media/RemoteTextTrackProxy.cpp 2021-05-13 14:12:22 UTC (rev 277433)
</span><span class="lines">@@ -69,7 +69,6 @@
</span><span class="cx"> configuration->startTimeVariance = m_trackPrivate->startTimeVariance();
</span><span class="cx">
</span><span class="cx"> configuration->cueFormat = m_trackPrivate->cueFormat();
</span><del>- configuration->mode = m_trackPrivate->mode();
</del><span class="cx"> configuration->isClosedCaptions = m_trackPrivate->isClosedCaptions();
</span><span class="cx"> configuration->isSDH = m_trackPrivate->isSDH();
</span><span class="cx"> configuration->containsOnlyForcedSubtitles = m_trackPrivate->containsOnlyForcedSubtitles();
</span></span></pre></div>
<a id="trunkSourceWebKitGPUProcessmediaTextTrackPrivateRemoteConfigurationh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit/GPUProcess/media/TextTrackPrivateRemoteConfiguration.h (277432 => 277433)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit/GPUProcess/media/TextTrackPrivateRemoteConfiguration.h 2021-05-13 13:54:43 UTC (rev 277432)
+++ trunk/Source/WebKit/GPUProcess/media/TextTrackPrivateRemoteConfiguration.h 2021-05-13 14:12:22 UTC (rev 277433)
</span><span class="lines">@@ -42,7 +42,6 @@
</span><span class="cx"> int trackIndex;
</span><span class="cx">
</span><span class="cx"> WebCore::InbandTextTrackPrivate::CueFormat cueFormat { WebCore::InbandTextTrackPrivate::CueFormat::Generic };
</span><del>- WebCore::InbandTextTrackPrivate::Mode mode { WebCore::InbandTextTrackPrivate::Mode::Disabled };
</del><span class="cx"> WebCore::InbandTextTrackPrivate::Kind kind { WebCore::InbandTextTrackPrivate::Kind::None };
</span><span class="cx">
</span><span class="cx"> bool isClosedCaptions { false };
</span><span class="lines">@@ -62,7 +61,6 @@
</span><span class="cx"> encoder << startTimeVariance;
</span><span class="cx"> encoder << trackIndex;
</span><span class="cx"> encoder << cueFormat;
</span><del>- encoder << mode;
</del><span class="cx"> encoder << kind;
</span><span class="cx"> encoder << isClosedCaptions;
</span><span class="cx"> encoder << isSDH;
</span><span class="lines">@@ -110,11 +108,6 @@
</span><span class="cx"> if (!cueFormat)
</span><span class="cx"> return WTF::nullopt;
</span><span class="cx">
</span><del>- Optional<WebCore::InbandTextTrackPrivate::Mode> mode;
- decoder >> mode;
- if (!mode)
- return WTF::nullopt;
-
</del><span class="cx"> Optional<WebCore::InbandTextTrackPrivate::Kind> kind;
</span><span class="cx"> decoder >> kind;
</span><span class="cx"> if (!kind)
</span><span class="lines">@@ -158,7 +151,6 @@
</span><span class="cx"> WTFMove(*startTimeVariance),
</span><span class="cx"> *trackIndex,
</span><span class="cx"> *cueFormat,
</span><del>- *mode,
</del><span class="cx"> *kind,
</span><span class="cx"> *isClosedCaptions,
</span><span class="cx"> *isSDH,
</span></span></pre></div>
<a id="trunkSourceWebKitWebProcessGPUmediaTextTrackPrivateRemotecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit/WebProcess/GPU/media/TextTrackPrivateRemote.cpp (277432 => 277433)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit/WebProcess/GPU/media/TextTrackPrivateRemote.cpp 2021-05-13 13:54:43 UTC (rev 277432)
+++ trunk/Source/WebKit/WebProcess/GPU/media/TextTrackPrivateRemote.cpp 2021-05-13 14:12:22 UTC (rev 277433)
</span><span class="lines">@@ -51,9 +51,10 @@
</span><span class="cx"> if (!m_gpuProcessConnection)
</span><span class="cx"> return;
</span><span class="cx">
</span><del>- if (mode != m_mode)
- m_gpuProcessConnection->connection().send(Messages::RemoteMediaPlayerProxy::TextTrackSetMode(m_identifier, mode), m_playerIdentifier);
</del><ins>+ if (mode == InbandTextTrackPrivate::mode())
+ return;
</ins><span class="cx">
</span><ins>+ m_gpuProcessConnection->connection().send(Messages::RemoteMediaPlayerProxy::TextTrackSetMode(m_identifier, mode), m_playerIdentifier);
</ins><span class="cx"> InbandTextTrackPrivate::setMode(mode);
</span><span class="cx"> }
</span><span class="cx">
</span><span class="lines">@@ -84,9 +85,7 @@
</span><span class="cx"> m_inBandMetadataTrackDispatchType = configuration.inBandMetadataTrackDispatchType;
</span><span class="cx"> m_startTimeVariance = configuration.startTimeVariance;
</span><span class="cx">
</span><del>- m_format = configuration.cueFormat;
</del><span class="cx"> m_kind = configuration.kind;
</span><del>- m_mode = configuration.mode;
</del><span class="cx"> m_isClosedCaptions = configuration.isClosedCaptions;
</span><span class="cx"> m_isSDH = configuration.isSDH;
</span><span class="cx"> m_containsOnlyForcedSubtitles = configuration.containsOnlyForcedSubtitles;
</span></span></pre></div>
<a id="trunkSourceWebKitWebProcessGPUmediaTextTrackPrivateRemoteh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit/WebProcess/GPU/media/TextTrackPrivateRemote.h (277432 => 277433)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit/WebProcess/GPU/media/TextTrackPrivateRemote.h 2021-05-13 13:54:43 UTC (rev 277432)
+++ trunk/Source/WebKit/WebProcess/GPU/media/TextTrackPrivateRemote.h 2021-05-13 14:12:22 UTC (rev 277433)
</span><span class="lines">@@ -80,15 +80,11 @@
</span><span class="cx"> int trackIndex() const final { return m_trackIndex; }
</span><span class="cx"> AtomString inBandMetadataTrackDispatchType() const final { return m_inBandMetadataTrackDispatchType; }
</span><span class="cx">
</span><del>- using TextTrackCueFormat = WebCore::InbandTextTrackPrivate::CueFormat;
- TextTrackCueFormat cueFormat() const final { return m_format; }
-
</del><span class="cx"> using TextTrackKind = WebCore::InbandTextTrackPrivate::Kind;
</span><span class="cx"> TextTrackKind kind() const final { return m_kind; }
</span><span class="cx">
</span><span class="cx"> using TextTrackMode = WebCore::InbandTextTrackPrivate::Mode;
</span><span class="cx"> void setMode(TextTrackMode) final;
</span><del>- TextTrackMode mode() const final { return m_mode; }
</del><span class="cx">
</span><span class="cx"> bool isClosedCaptions() const final { return m_isClosedCaptions; }
</span><span class="cx"> bool isSDH() const final { return m_isSDH; }
</span><span class="lines">@@ -110,9 +106,7 @@
</span><span class="cx"> WebCore::MediaPlayerIdentifier m_playerIdentifier;
</span><span class="cx"> TrackPrivateRemoteIdentifier m_identifier;
</span><span class="cx">
</span><del>- TextTrackCueFormat m_format { TextTrackCueFormat::Generic };
</del><span class="cx"> TextTrackKind m_kind { TextTrackKind::None };
</span><del>- TextTrackMode m_mode { TextTrackMode::Disabled };
</del><span class="cx"> bool m_isClosedCaptions { false };
</span><span class="cx"> bool m_isSDH { false };
</span><span class="cx"> bool m_containsOnlyForcedSubtitles { false };
</span></span></pre>
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