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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/179869">179869</a></dd>
<dt>Author</dt> <dd>eric.carlson@apple.com</dd>
<dt>Date</dt> <dd>2015-02-10 07:47:51 -0800 (Tue, 10 Feb 2015)</dd>
</dl>

<h3>Log Message</h3>
<pre>[iOS] don't get out of sync when interrupt/resume calls are not balanced
https://bugs.webkit.org/show_bug.cgi?id=141310

Reviewed by Jer Noble.

Source/WebCore:

No new tests, updated media/video-interruption-with-resume-allowing-play.html.

* platform/audio/MediaSession.cpp:
(WebCore::MediaSession::beginInterruption): Count interruptions.
(WebCore::MediaSession::endInterruption): Ignore calls when m_interruptionCount is already zero.
* platform/audio/MediaSession.h:

LayoutTests:

* media/video-interruption-with-resume-allowing-play-expected.txt:
* media/video-interruption-with-resume-allowing-play.html: Updated to test unbalanced calls
    to begin/end interruption.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkLayoutTestsmediavideointerruptionwithresumeallowingplayexpectedtxt">trunk/LayoutTests/media/video-interruption-with-resume-allowing-play-expected.txt</a></li>
<li><a href="#trunkLayoutTestsmediavideointerruptionwithresumeallowingplayhtml">trunk/LayoutTests/media/video-interruption-with-resume-allowing-play.html</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreplatformaudioMediaSessioncpp">trunk/Source/WebCore/platform/audio/MediaSession.cpp</a></li>
<li><a href="#trunkSourceWebCoreplatformaudioMediaSessionh">trunk/Source/WebCore/platform/audio/MediaSession.h</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (179868 => 179869)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog        2015-02-10 14:42:26 UTC (rev 179868)
+++ trunk/LayoutTests/ChangeLog        2015-02-10 15:47:51 UTC (rev 179869)
</span><span class="lines">@@ -1,3 +1,14 @@
</span><ins>+2015-02-10  Eric Carlson  &lt;eric.carlson@apple.com&gt;
+
+        [iOS] don't get out of sync when interrupt/resume calls are not balanced
+        https://bugs.webkit.org/show_bug.cgi?id=141310
+
+        Reviewed by Jer Noble.
+
+        * media/video-interruption-with-resume-allowing-play-expected.txt:
+        * media/video-interruption-with-resume-allowing-play.html: Updated to test unbalanced calls 
+            to begin/end interruption.
+
</ins><span class="cx"> 2015-02-10  Marcos Chavarría Teijeiro  &lt;chavarria1991@gmail.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Unreviewed GTK Gardening.
</span></span></pre></div>
<a id="trunkLayoutTestsmediavideointerruptionwithresumeallowingplayexpectedtxt"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/media/video-interruption-with-resume-allowing-play-expected.txt (179868 => 179869)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/media/video-interruption-with-resume-allowing-play-expected.txt        2015-02-10 14:42:26 UTC (rev 179868)
+++ trunk/LayoutTests/media/video-interruption-with-resume-allowing-play-expected.txt        2015-02-10 15:47:51 UTC (rev 179869)
</span><span class="lines">@@ -15,5 +15,15 @@
</span><span class="cx"> EVENT(playing)
</span><span class="cx"> EXPECTED (video.paused == 'false') OK
</span><span class="cx"> 
</span><ins>+EXPECTED (video.paused == 'false') OK
+RUN(internals.beginMediaSessionInterruption())
+
+100ms timer fired...
+EXPECTED (video.paused == 'true') OK
+RUN(internals.endMediaSessionInterruption('MayResumePlaying'))
+
+EVENT(playing)
+EXPECTED (video.paused == 'false') OK
+
</ins><span class="cx"> END OF TEST
</span><span class="cx"> 
</span></span></pre></div>
<a id="trunkLayoutTestsmediavideointerruptionwithresumeallowingplayhtml"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/media/video-interruption-with-resume-allowing-play.html (179868 => 179869)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/media/video-interruption-with-resume-allowing-play.html        2015-02-10 14:42:26 UTC (rev 179868)
+++ trunk/LayoutTests/media/video-interruption-with-resume-allowing-play.html        2015-02-10 15:47:51 UTC (rev 179869)
</span><span class="lines">@@ -4,6 +4,7 @@
</span><span class="cx">         &lt;script src=video-test.js&gt;&lt;/script&gt;
</span><span class="cx">         &lt;script&gt;
</span><span class="cx">             var state = 0;
</span><ins>+            var resumeCount = 0;
</ins><span class="cx"> 
</span><span class="cx">             function checkState()
</span><span class="cx">             {
</span><span class="lines">@@ -15,6 +16,7 @@
</span><span class="cx">                     setTimeout(checkState, 100);
</span><span class="cx">                     consoleWrite(&quot;&quot;);
</span><span class="cx">                     break;
</span><ins>+
</ins><span class="cx">                 case &quot;interrupted&quot;:
</span><span class="cx">                     consoleWrite(&quot;100ms timer fired...&quot;);
</span><span class="cx">                     testExpected(&quot;video.paused&quot;, true);
</span><span class="lines">@@ -22,10 +24,14 @@
</span><span class="cx">                     run(&quot;internals.endMediaSessionInterruption('MayResumePlaying')&quot;);
</span><span class="cx">                     consoleWrite(&quot;&quot;);
</span><span class="cx">                     break;
</span><ins>+
</ins><span class="cx">                 case &quot;resuming&quot;:
</span><span class="cx">                     testExpected(&quot;video.paused&quot;, false);
</span><span class="cx">                     consoleWrite(&quot;&quot;);
</span><del>-                    endTest();
</del><ins>+                    if (++resumeCount == 2)
+                        endTest();
+                    state = &quot;playing&quot;;
+                    setTimeout(checkState, 100);
</ins><span class="cx">                     break;
</span><span class="cx">                 }
</span><span class="cx">             }
</span></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (179868 => 179869)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2015-02-10 14:42:26 UTC (rev 179868)
+++ trunk/Source/WebCore/ChangeLog        2015-02-10 15:47:51 UTC (rev 179869)
</span><span class="lines">@@ -1,3 +1,17 @@
</span><ins>+2015-02-10  Eric Carlson  &lt;eric.carlson@apple.com&gt;
+
+        [iOS] don't get out of sync when interrupt/resume calls are not balanced
+        https://bugs.webkit.org/show_bug.cgi?id=141310
+
+        Reviewed by Jer Noble.
+
+        No new tests, updated media/video-interruption-with-resume-allowing-play.html.
+
+        * platform/audio/MediaSession.cpp:
+        (WebCore::MediaSession::beginInterruption): Count interruptions.
+        (WebCore::MediaSession::endInterruption): Ignore calls when m_interruptionCount is already zero.
+        * platform/audio/MediaSession.h:
+
</ins><span class="cx"> 2015-02-10  Carlos Garcia Campos  &lt;cgarcia@igalia.com&gt;
</span><span class="cx"> 
</span><span class="cx">         [GTK] GMutexLocker build issue
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformaudioMediaSessioncpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/audio/MediaSession.cpp (179868 => 179869)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/audio/MediaSession.cpp        2015-02-10 14:42:26 UTC (rev 179868)
+++ trunk/Source/WebCore/platform/audio/MediaSession.cpp        2015-02-10 15:47:51 UTC (rev 179869)
</span><span class="lines">@@ -81,9 +81,9 @@
</span><span class="cx"> 
</span><span class="cx"> void MediaSession::beginInterruption(InterruptionType type)
</span><span class="cx"> {
</span><del>-    LOG(Media, &quot;MediaSession::beginInterruption(%p), state = %s&quot;, this, stateName(m_state));
</del><ins>+    LOG(Media, &quot;MediaSession::beginInterruption(%p), state = %s, interruption count = %i&quot;, this, stateName(m_state), m_interruptionCount);
</ins><span class="cx"> 
</span><del>-    if (type == EnteringBackground &amp;&amp; client().overrideBackgroundPlaybackRestriction())
</del><ins>+    if (++m_interruptionCount &gt; 1 || (type == EnteringBackground &amp;&amp; client().overrideBackgroundPlaybackRestriction()))
</ins><span class="cx">         return;
</span><span class="cx"> 
</span><span class="cx">     m_stateToRestore = state();
</span><span class="lines">@@ -95,8 +95,16 @@
</span><span class="cx"> 
</span><span class="cx"> void MediaSession::endInterruption(EndInterruptionFlags flags)
</span><span class="cx"> {
</span><del>-    LOG(Media, &quot;MediaSession::endInterruption(%p) - flags = %i, stateToRestore = %s&quot;, this, (int)flags, stateName(m_stateToRestore));
</del><ins>+    LOG(Media, &quot;MediaSession::endInterruption(%p) - flags = %i, stateToRestore = %s, interruption count = %i&quot;, this, (int)flags, stateName(m_stateToRestore), m_interruptionCount);
</ins><span class="cx"> 
</span><ins>+    if (!m_interruptionCount) {
+        LOG(Media, &quot;MediaSession::endInterruption(%p) - !! ignoring spurious interruption end !!&quot;, this);
+        return;
+    }
+
+    if (--m_interruptionCount)
+        return;
+
</ins><span class="cx">     State stateToRestore = m_stateToRestore;
</span><span class="cx">     m_stateToRestore = Idle;
</span><span class="cx">     setState(Paused);
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformaudioMediaSessionh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/audio/MediaSession.h (179868 => 179869)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/audio/MediaSession.h        2015-02-10 14:42:26 UTC (rev 179868)
+++ trunk/Source/WebCore/platform/audio/MediaSession.h        2015-02-10 15:47:51 UTC (rev 179869)
</span><span class="lines">@@ -122,6 +122,7 @@
</span><span class="cx">     Timer m_clientDataBufferingTimer;
</span><span class="cx">     State m_state;
</span><span class="cx">     State m_stateToRestore;
</span><ins>+    int m_interruptionCount { 0 };
</ins><span class="cx">     bool m_notifyingClient;
</span><span class="cx"> };
</span><span class="cx"> 
</span></span></pre>
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