Title: [203901] trunk
Revision
203901
Author
commit-qu...@webkit.org
Date
2016-07-29 10:00:00 -0700 (Fri, 29 Jul 2016)

Log Message

HTMLVideoElement with MediaStream src shows paused image when all video tracks are disabled
https://bugs.webkit.org/show_bug.cgi?id=160222
<rdar://problem/27557313>

Patch by George Ruan <gr...@apple.com> on 2016-07-29
Reviewed by Eric Carlson.

Source/WebCore:

Tests: fast/mediastream/MediaStream-video-element-video-tracks-disabled-then-enabled.html
       fast/mediastream/MediaStream-video-element-video-tracks-disabled.html

* platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaStreamAVFObjC.h:
* platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaStreamAVFObjC.mm:
(WebCore::MediaPlayerPrivateMediaStreamAVFObjC::enqueueVideoSampleBufferFromTrack): Change criteria to enqueue a
Sample Buffer to the AVSampleBufferDisplayLayer to allow an initial frame to be shown.
(WebCore::MediaPlayerPrivateMediaStreamAVFObjC::shouldEnqueueVideoSampleBuffer): Allow an initial frame to be shown.
(WebCore::MediaPlayerPrivateMediaStreamAVFObjC::flushAndRemoveVideoSampleBuffers): Removes all buffers from the
AVSampleBufferDisplayLayer.
(WebCore::MediaPlayerPrivateMediaStreamAVFObjC::ensureLayer): Make the AVSampleBufferDisplayLayer's background black.
(WebCore::MediaPlayerPrivateMediaStreamAVFObjC::updateDisplayMode): Remove all buffers from the AVSampleBufferDisplayLayer
when state of MediaPlayerPrivateMediaStreamAVFObjC is changed to None of PaintItBlack.
(WebCore::MediaPlayerPrivateMediaStreamAVFObjC::updatePausedImage): Updates paused image.
(WebCore::MediaPlayerPrivateMediaStreamAVFObjC::pause): Calls updatePausedImage.
(WebCore::MediaPlayerPrivateMediaStreamAVFObjC::paintCurrentFrameInContext): Allow an initial frame to be painted to canvas.

LayoutTests:

* fast/mediastream/MediaStream-video-element-video-tracks-disabled-expected.html: Added.
* fast/mediastream/MediaStream-video-element-video-tracks-disabled-then-enabled-expected.txt: Added.
* fast/mediastream/MediaStream-video-element-video-tracks-disabled-then-enabled.html: Added. Checks
that the video frames display captured media if all video tracks were disabled and then a single
video track is re-enabled. This test also checks that an initial frame is painted to
canvas if the video has not yet been played.
* fast/mediastream/MediaStream-video-element-video-tracks-disabled.html: Added. Reference tests the
frames of the video to be black, since the canvas is painted black regardless of the state of the video frames
if displayMode of MediaPlayerPrivateMediaStreamAVFObjC is PaintItBlack.
* platform/mac-wk2/TestExpectations: MediaStream-video-element-video-tracks-disabled.html fails on El
Capitan due to incorrect behavior of AVSampleBufferDisplayLayer's API call flushAndRemoveImage.

Modified Paths

Added Paths

Diff

Modified: trunk/LayoutTests/ChangeLog (203900 => 203901)


--- trunk/LayoutTests/ChangeLog	2016-07-29 14:12:03 UTC (rev 203900)
+++ trunk/LayoutTests/ChangeLog	2016-07-29 17:00:00 UTC (rev 203901)
@@ -1,3 +1,23 @@
+2016-07-29  George Ruan  <gr...@apple.com>
+
+        HTMLVideoElement with MediaStream src shows paused image when all video tracks are disabled
+        https://bugs.webkit.org/show_bug.cgi?id=160222
+        <rdar://problem/27557313>
+
+        Reviewed by Eric Carlson.
+
+        * fast/mediastream/MediaStream-video-element-video-tracks-disabled-expected.html: Added.
+        * fast/mediastream/MediaStream-video-element-video-tracks-disabled-then-enabled-expected.txt: Added.
+        * fast/mediastream/MediaStream-video-element-video-tracks-disabled-then-enabled.html: Added. Checks
+        that the video frames display captured media if all video tracks were disabled and then a single
+        video track is re-enabled. This test also checks that an initial frame is painted to
+        canvas if the video has not yet been played.
+        * fast/mediastream/MediaStream-video-element-video-tracks-disabled.html: Added. Reference tests the
+        frames of the video to be black, since the canvas is painted black regardless of the state of the video frames
+        if displayMode of MediaPlayerPrivateMediaStreamAVFObjC is PaintItBlack.
+        * platform/mac-wk2/TestExpectations: MediaStream-video-element-video-tracks-disabled.html fails on El
+        Capitan due to incorrect behavior of AVSampleBufferDisplayLayer's API call flushAndRemoveImage.
+
 2016-07-29  Youenn Fablet  <you...@apple.com>
 
         CrossOrigin preflight checker should compute the right Access-Control-Request-Headers value

Added: trunk/LayoutTests/fast/mediastream/MediaStream-video-element-video-tracks-disabled-expected.html (0 => 203901)


--- trunk/LayoutTests/fast/mediastream/MediaStream-video-element-video-tracks-disabled-expected.html	                        (rev 0)
+++ trunk/LayoutTests/fast/mediastream/MediaStream-video-element-video-tracks-disabled-expected.html	2016-07-29 17:00:00 UTC (rev 203901)
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+
+<html>
+<head>
+    <style>
+        .video {
+            position: absolute;
+            left: 10px;
+            top: 50px;
+            height: 360px;
+            width: 680px;
+            background-color: black;
+            will-change: transform;
+        }
+        
+        .masker {
+            position: absolute;
+            left: 10px;
+            top: 50px;
+            height: 360px;
+            width: 680px;
+            border-top: 50px solid white;
+            border-right: 300px solid white;
+            border-bottom: 50px solid white;
+            border-left: 300px solid white;
+            box-sizing: border-box;
+        }
+    </style>
+</head>
+<body>
+<p>Tests that the video frames of an HTMLVideoElement are black if no video MediaStreamTrack is enabled.</p>
+<div class="video"></div>
+<div class="masker"></div>
+
+</body>
+</html>

Added: trunk/LayoutTests/fast/mediastream/MediaStream-video-element-video-tracks-disabled-then-enabled-expected.txt (0 => 203901)


--- trunk/LayoutTests/fast/mediastream/MediaStream-video-element-video-tracks-disabled-then-enabled-expected.txt	                        (rev 0)
+++ trunk/LayoutTests/fast/mediastream/MediaStream-video-element-video-tracks-disabled-then-enabled-expected.txt	2016-07-29 17:00:00 UTC (rev 203901)
@@ -0,0 +1,32 @@
+Tests that re-enabling a video MediaStreamTrack when all tracks were previously disabled causes captured media to display.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS mediaDevices.getUserMedia generated a stream successfully.
+video.src = ""
+
+ === beginning round of pixel tests ===
+PASS pixel was white
+
+ === all video tracks disabled ===
+PASS pixel was black.
+
+ === video track reenabled ===
+PASS pixel was white.
+
+ ===== play video =====
+video.play()
+
+ === beginning round of pixel tests ===
+PASS pixel was white
+
+ === all video tracks disabled ===
+PASS pixel was black.
+
+ === video track reenabled ===
+PASS pixel was white.
+PASS successfullyParsed is true
+
+TEST COMPLETE
+ 

Added: trunk/LayoutTests/fast/mediastream/MediaStream-video-element-video-tracks-disabled-then-enabled.html (0 => 203901)


--- trunk/LayoutTests/fast/mediastream/MediaStream-video-element-video-tracks-disabled-then-enabled.html	                        (rev 0)
+++ trunk/LayoutTests/fast/mediastream/MediaStream-video-element-video-tracks-disabled-then-enabled.html	2016-07-29 17:00:00 UTC (rev 203901)
@@ -0,0 +1,128 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src=""
+    <script src=""
+</head>
+<body _onload_="start()">
+<p id="description"></p>
+<div id="console"></div>
+<video controls width="680" height="360"></video>
+<canvas width="680" height="360"></canvas>
+<script>
+    let canvas;
+    let context;
+    let mediaStream;
+    let video;
+    
+    let buffer;
+
+    function isPixelBlack(pixel)
+    {
+        return pixel[0] === 0 && pixel[1] === 0 && pixel[2] === 0 && pixel[3] === 255;
+    }
+
+    function isPixelTransparent(pixel)
+    {
+        return pixel[0] === 0 && pixel[1] === 0 && pixel[2] === 0 && pixel[3] === 0;
+    }
+
+    function isPixelWhite(pixel)
+    {
+        return pixel[0] === 255 && pixel[1] === 255 && pixel[2] === 255 && pixel[3] === 255;
+    }
+
+    function attempt(numberOfTries, call, callback, successMessage)
+    {
+        if (numberOfTries <= 0) {
+            testFailed('Pixel check did not succeed after multiple tries.');
+            return;
+        }
+
+        let attemptSucceeded = call();
+        if (attemptSucceeded) {
+            testPassed(successMessage);
+            callback();
+
+            return;
+        }
+        
+        setTimeout(() => { attempt(--numberOfTries, call, callback, successMessage); }, 50);
+    }
+
+    function repeatWithVideoPlayingAndFinishTest()
+    {
+        if (video.paused) {
+            debug('<br> ===== play video =====');
+            evalAndLog('video.play()');
+            beginTestRound();
+        } else
+            finishJSTest();
+    }
+
+    function reenableTrack()
+    {
+        mediaStream.getVideoTracks()[0].enabled = true;
+        debug('<br> === video track reenabled ===');
+
+        // The video is not guaranteed to render non-black frames before the canvas is drawn to and the pixels are checked.
+        // A timeout is used to ensure that the pixel check is done after the video renders non-black frames.
+        attempt(10, checkPixels, repeatWithVideoPlayingAndFinishTest, 'pixel was white.');
+    }
+
+    function checkPixels()
+    {
+        context.clearRect(0, 0, canvas.width, canvas.height);
+        buffer = context.getImageData(30, 242, 1, 1).data;
+        if(!isPixelTransparent(buffer)) {
+            testFailed('pixel was not transparent after clearing canvas.');
+        }
+
+        context.drawImage(video, 0, 0, canvas.width, canvas.height);
+        buffer = context.getImageData(30, 242, 1, 1).data;
+
+        if (mediaStream.getVideoTracks()[0].enabled)
+            return isPixelWhite(buffer);
+        else
+            return isPixelBlack(buffer);
+    }
+
+    function disableAllTracks()
+    {
+        mediaStream.getVideoTracks()[0].enabled = false;
+        debug('<br> === all video tracks disabled ===');
+        
+        // The video is not guaranteed to render black frames before the canvas is drawn to and the pixels are checked.
+        // A timeout is used to ensure that the pixel check is done after the video renders black frames.
+        attempt(10, checkPixels, reenableTrack, 'pixel was black.');
+    }
+
+    function beginTestRound()
+    {
+        debug('<br> === beginning round of pixel tests ===');
+        attempt(1, checkPixels, disableAllTracks, 'pixel was white');
+    }
+
+    function canplay()
+    {
+        canvas = document.querySelector('canvas');
+        context = canvas.getContext('2d');
+
+        beginTestRound();
+    }
+
+    function start()
+    {
+        description("Tests that re-enabling a video MediaStreamTrack when all tracks were previously disabled causes captured media to display.");
+
+        video = document.querySelector('video');
+        video.addEventListener('canplay', canplay);
+
+        getUserMedia("allow", {video:true}, setupVideoElementWithStream);
+    }
+
+    window.jsTestIsAsync = true;
+</script>
+<script src=""
+</body>
+</html>
\ No newline at end of file

Added: trunk/LayoutTests/fast/mediastream/MediaStream-video-element-video-tracks-disabled.html (0 => 203901)


--- trunk/LayoutTests/fast/mediastream/MediaStream-video-element-video-tracks-disabled.html	                        (rev 0)
+++ trunk/LayoutTests/fast/mediastream/MediaStream-video-element-video-tracks-disabled.html	2016-07-29 17:00:00 UTC (rev 203901)
@@ -0,0 +1,81 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <style>
+        video {
+            position: absolute;
+            left: 10px;
+            top: 50px;
+        }
+        
+        .masker {
+            position: absolute;
+            left: 10px;
+            top: 50px;
+            height: 360px;
+            width: 680px;
+            border-top: 50px solid white;
+            border-right: 300px solid white;
+            border-bottom: 50px solid white;
+            border-left: 300px solid white;
+            box-sizing: border-box;
+        }
+    </style>
+</head>
+
+<body>
+<p>Tests that the video frames of an HTMLVideoElement are black if no video MediaStreamTrack is enabled.</p>
+<video controls width="680" height="360"></video>
+<div class="masker"></div>
+
+<script>
+    let mediaStream;
+    let video;
+
+    function debug(msg)
+    {
+        let span = document.createElement('span');
+        document.body.appendChild(span);
+        span.innerHTML = `${msg} <br />`;
+    }
+
+    function canplaythrough()
+    {    
+        mediaStream.getVideoTracks()[0].enabled = false;
+        window.testRunner.notifyDone();
+    }
+
+    function canplay()
+    {
+        video.play();
+    }
+
+    function setupStream(stream)
+    {
+        mediaStream = stream;
+        video.src = ""
+    }
+
+    function failedToSetupStream()
+    {
+        debug('Failed to setup stream');
+    }
+
+    function start()
+    {
+        video = document.querySelector('video');
+        video.addEventListener('canplay', canplay, false);
+        video.addEventListener('canplaythrough', canplaythrough, false);
+        navigator.mediaDevices.getUserMedia({video:true})
+            .then(setupStream)
+            .catch(failedToSetupStream);
+    }
+
+    if (window.testRunner) {
+        window.testRunner.waitUntilDone();
+        window.testRunner.setUserMediaPermission(true);
+        start();
+    }
+</script>
+</body>
+</html>

Modified: trunk/LayoutTests/platform/mac-wk2/TestExpectations (203900 => 203901)


--- trunk/LayoutTests/platform/mac-wk2/TestExpectations	2016-07-29 14:12:03 UTC (rev 203900)
+++ trunk/LayoutTests/platform/mac-wk2/TestExpectations	2016-07-29 17:00:00 UTC (rev 203901)
@@ -373,6 +373,9 @@
 
 [ Debug ] editing/undo/remove-css-property-and-remove-style.html [ Pass Failure ]
 
+# This test fails every time on El Capitan
+[ ElCapitan ] fast/mediastream/MediaStream-video-element-video-tracks-disabled.html [ Skip ]
+
 ### END OF (3) Unclassified failures
 ########################################
 

Modified: trunk/Source/WebCore/ChangeLog (203900 => 203901)


--- trunk/Source/WebCore/ChangeLog	2016-07-29 14:12:03 UTC (rev 203900)
+++ trunk/Source/WebCore/ChangeLog	2016-07-29 17:00:00 UTC (rev 203901)
@@ -1,3 +1,28 @@
+2016-07-29  George Ruan  <gr...@apple.com>
+
+        HTMLVideoElement with MediaStream src shows paused image when all video tracks are disabled
+        https://bugs.webkit.org/show_bug.cgi?id=160222
+        <rdar://problem/27557313>
+
+        Reviewed by Eric Carlson.
+
+        Tests: fast/mediastream/MediaStream-video-element-video-tracks-disabled-then-enabled.html
+               fast/mediastream/MediaStream-video-element-video-tracks-disabled.html
+
+        * platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaStreamAVFObjC.h:
+        * platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaStreamAVFObjC.mm:
+        (WebCore::MediaPlayerPrivateMediaStreamAVFObjC::enqueueVideoSampleBufferFromTrack): Change criteria to enqueue a
+        Sample Buffer to the AVSampleBufferDisplayLayer to allow an initial frame to be shown.
+        (WebCore::MediaPlayerPrivateMediaStreamAVFObjC::shouldEnqueueVideoSampleBuffer): Allow an initial frame to be shown.
+        (WebCore::MediaPlayerPrivateMediaStreamAVFObjC::flushAndRemoveVideoSampleBuffers): Removes all buffers from the
+        AVSampleBufferDisplayLayer.
+        (WebCore::MediaPlayerPrivateMediaStreamAVFObjC::ensureLayer): Make the AVSampleBufferDisplayLayer's background black.
+        (WebCore::MediaPlayerPrivateMediaStreamAVFObjC::updateDisplayMode): Remove all buffers from the AVSampleBufferDisplayLayer
+        when state of MediaPlayerPrivateMediaStreamAVFObjC is changed to None of PaintItBlack.
+        (WebCore::MediaPlayerPrivateMediaStreamAVFObjC::updatePausedImage): Updates paused image.
+        (WebCore::MediaPlayerPrivateMediaStreamAVFObjC::pause): Calls updatePausedImage.
+        (WebCore::MediaPlayerPrivateMediaStreamAVFObjC::paintCurrentFrameInContext): Allow an initial frame to be painted to canvas.
+
 2016-07-29  Youenn Fablet  <you...@apple.com>
 
         [Fetch API] Activate credentials mode

Modified: trunk/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaStreamAVFObjC.h (203900 => 203901)


--- trunk/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaStreamAVFObjC.h	2016-07-29 14:12:03 UTC (rev 203900)
+++ trunk/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaStreamAVFObjC.h	2016-07-29 17:00:00 UTC (rev 203901)
@@ -124,6 +124,8 @@
 
     void enqueueAudioSampleBufferFromTrack(MediaStreamTrackPrivate&, PlatformSample);
     void enqueueVideoSampleBufferFromTrack(MediaStreamTrackPrivate&, PlatformSample);
+    bool shouldEnqueueVideoSampleBuffer() const;
+    void flushAndRemoveVideoSampleBuffers();
 
     void paint(GraphicsContext&, const FloatRect&) override;
     void paintCurrentFrameInContext(GraphicsContext&, const FloatRect&) override;
@@ -161,6 +163,7 @@
     };
     DisplayMode currentDisplayMode() const;
     void updateDisplayMode();
+    void updatePausedImage();
 
     // MediaStreamPrivate::Observer
     void activeStatusChanged() override;
@@ -201,6 +204,7 @@
     bool m_ended { false };
     bool m_hasEverEnqueuedVideoFrame { false };
     bool m_hasReceivedMedia { false };
+    bool m_isFrameDisplayed { false };
 
 #if PLATFORM(MAC) && ENABLE(VIDEO_PRESENTATION_MODE)
     std::unique_ptr<VideoFullscreenLayerManager> m_videoFullscreenLayerManager;

Modified: trunk/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaStreamAVFObjC.mm (203900 => 203901)


--- trunk/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaStreamAVFObjC.mm	2016-07-29 14:12:03 UTC (rev 203900)
+++ trunk/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateMediaStreamAVFObjC.mm	2016-07-29 17:00:00 UTC (rev 203901)
@@ -129,16 +129,39 @@
     if (&track != m_mediaStreamPrivate->activeVideoTrack())
         return;
 
-    if (m_displayMode == LivePreview && [m_sampleBufferDisplayLayer isReadyForMoreMediaData]) {
+    if (shouldEnqueueVideoSampleBuffer()) {
         [m_sampleBufferDisplayLayer enqueueSampleBuffer:platformSample.sample.cmSampleBuffer];
+        m_isFrameDisplayed = true;
         
         if (!m_hasEverEnqueuedVideoFrame) {
             m_hasEverEnqueuedVideoFrame = true;
             m_player->firstVideoFrameAvailable();
+
+            updatePausedImage();
         }
     }
 }
 
+bool MediaPlayerPrivateMediaStreamAVFObjC::shouldEnqueueVideoSampleBuffer() const
+{
+    if (![m_sampleBufferDisplayLayer isReadyForMoreMediaData])
+        return false;
+
+    if (m_displayMode == LivePreview)
+        return true;
+
+    if (m_displayMode == PausedImage && !m_isFrameDisplayed)
+        return true;
+
+    return false;
+}
+
+void MediaPlayerPrivateMediaStreamAVFObjC::flushAndRemoveVideoSampleBuffers()
+{
+    [m_sampleBufferDisplayLayer flushAndRemoveImage];
+    m_isFrameDisplayed = false;
+}
+
 void MediaPlayerPrivateMediaStreamAVFObjC::ensureLayer()
 {
     if (m_sampleBufferDisplayLayer)
@@ -148,6 +171,7 @@
 #ifndef NDEBUG
     [m_sampleBufferDisplayLayer setName:@"MediaPlayerPrivateMediaStreamAVFObjC AVSampleBufferDisplayLayer"];
 #endif
+    m_sampleBufferDisplayLayer.get().backgroundColor = cachedCGColor(Color::black);
     
     renderingModeChanged();
     
@@ -257,8 +281,24 @@
         return;
     m_displayMode = displayMode;
 
-    if (m_displayMode == None)
+    if (m_displayMode < PausedImage && m_sampleBufferDisplayLayer)
+        flushAndRemoveVideoSampleBuffers();
+}
+
+void MediaPlayerPrivateMediaStreamAVFObjC::updatePausedImage()
+{
+    ASSERT(m_displayMode == currentDisplayMode());
+
+    if (m_displayMode < PausedImage)
         return;
+
+    RefPtr<Image> image = m_mediaStreamPrivate->currentFrameImage();
+    ASSERT(image);
+    if (!image)
+        return;
+
+    m_pausedImage = image->getCGImageRef();
+    ASSERT(m_pausedImage);
 }
 
 void MediaPlayerPrivateMediaStreamAVFObjC::play()
@@ -286,6 +326,7 @@
     m_clock->stop();
     m_playing = false;
     updateDisplayMode();
+    updatePausedImage();
 }
 
 bool MediaPlayerPrivateMediaStreamAVFObjC::paused() const
@@ -577,10 +618,9 @@
 
 void MediaPlayerPrivateMediaStreamAVFObjC::paintCurrentFrameInContext(GraphicsContext& context, const FloatRect& rect)
 {
-    if (m_displayMode == None || !metaDataAvailable() || context.paintingDisabled() || !m_haveEverPlayed)
+    if (m_displayMode == None || !metaDataAvailable() || context.paintingDisabled())
         return;
 
-
     if (m_displayMode == LivePreview)
         m_mediaStreamPrivate->paintCurrentFrameInContext(context, rect);
     else {
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