Attachment 348418 Details for Bug 189000 – Patch

[patch] Patch

bug-189000-20180829114259.patch (text/plain), 103.36 KB, created by Eric Carlson on 2018-08-29 11:43:01 PDT

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Creator: Eric Carlson

Created: 2018-08-29 11:43:01 PDT

Size: 103.36 KB

patch

obsolete

>Subversion Revision: 235468
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index d17dc740f5a79bf25e3711dbecc3d0e70b21f1ea..5262834263ac1e90d68b425a8a0272ad4ad69697 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,115 @@
>+2018-08-29  Eric Carlson  <eric.carlson@apple.com>
>+
>+        Mock video devices should only support discrete sizes
>+        https://bugs.webkit.org/show_bug.cgi?id=189000
>+        <rdar://problem/43766551>
>+
>+        Reviewed by NOBODY (OOPS!).
>+        
>+        While many/most video capture devices only support a finite number of discrete width/height
>+        pairs, our mock video capture devices supported arbitrary width and height combinations which
>+        made it difficult to write realistic tests using them. Change the mock devices to support
>+        finite "presets" like those supported by AVFoundation. Create a RealtimeVideoSource base
>+        class with support for these presets, so the same code will eventually be used by the mock
>+        and real capture devices.
>+
>+        No new tests, existing tests updated for these changes.
>+
>+        * Sources.txt: Add RealtimeVideoSource.cpp, remove MockRealtimeMediaSource.cpp.
>+
>+        * WebCore.xcodeproj/project.pbxproj: Ditto.
>+
>+        * platform/mediastream/MediaConstraints.h: Deal with min constraint less than the supported minimum
>+        and max larger than the supported maximum when there is no ideal.
>+
>+        * platform/mediastream/RealtimeMediaSource.cpp:
>+        (WebCore::RealtimeMediaSource::selectSettings): Use supportsSizeAndFrameRate for widths,
>+        heights, and framerates in advanced constraints so a width and height that are supported but
>+        in the same preset are filtered out.
>+        (WebCore::RealtimeMediaSource::setSize): New.
>+        * platform/mediastream/RealtimeMediaSource.h:
>+
>+        * platform/mediastream/RealtimeMediaSourceSettings.h: Remove an unneeded include.
>+
>+        * platform/mediastream/RealtimeVideoSource.cpp: Added.
>+        (WebCore::RealtimeVideoSource::RealtimeVideoSource):
>+        (WebCore::RealtimeVideoSource::~RealtimeVideoSource):
>+        (WebCore::RealtimeVideoSource::startProducingData):
>+        (WebCore::RealtimeVideoSource::setSupportedFrameRates):
>+        (WebCore::RealtimeVideoSource::addSupportedCapabilities const):
>+        (WebCore::RealtimeVideoSource::supportsSizeAndFrameRate):
>+        (WebCore::RealtimeVideoSource::bestSupportedCaptureSizeForWidthAndHeight):
>+        (WebCore::RealtimeVideoSource::applySize):
>+        (WebCore::RealtimeVideoSource::applySizeAndFrameRate):
>+        (WebCore::RealtimeVideoSource::videoSampleAvailable):
>+        (WebCore::RealtimeVideoSource::applyFrameRate):
>+        (WebCore::RealtimeVideoSource::supportsFrameRate):
>+
>+        * platform/mediastream/RealtimeVideoSource.h: Copied from Source/WebCore/platform/mock/MockRealtimeAudioSource.h.
>+        (WebCore::RealtimeVideoSource::setSupportedCaptureSizes):
>+        (WebCore::RealtimeVideoSource::setDefaultSize):
>+        (WebCore::RealtimeVideoSource::observedFrameRate const):
>+
>+        * platform/mediastream/mac/AVMediaCaptureSource.mm:
>+        (WebCore::AVMediaCaptureSource::initializeSettings): Don't set label, it isn't used.
>+
>+        * platform/mediastream/mac/MockRealtimeVideoSourceMac.mm:
>+        (WebCore::MockRealtimeVideoSourceMac::applySize): Call the base class.
>+
>+        * platform/mock/MockMediaDevice.h:
>+        (WebCore::MockCameraProperties::encode const): Add frame rates, sizes, and facing mode.
>+        (WebCore::MockCameraProperties::decode): Ditto.
>+
>+        * platform/mock/MockRealtimeAudioSource.cpp:
>+        (WebCore::MockRealtimeAudioSource::MockRealtimeAudioSource): No more MockRealtimeMediaSource.
>+        (WebCore::MockRealtimeAudioSource::settings const): Clean up.
>+        (WebCore::MockRealtimeAudioSource::capabilities const): Ditto.
>+        (WebCore::MockRealtimeAudioSource::settingsDidChange): Ditto.
>+        (WebCore::MockRealtimeAudioSource::stopProducingData): m_elapsedTime isn't used, delete it.
>+        (WebCore::MockRealtimeAudioSource::updateSettings): Deleted.
>+        (WebCore::MockRealtimeAudioSource::initializeCapabilities): Deleted.
>+        (WebCore::MockRealtimeAudioSource::initializeSupportedConstraints): Deleted.
>+        (WebCore::MockRealtimeAudioSource::elapsedTime): Deleted.
>+        * platform/mock/MockRealtimeAudioSource.h:
>+
>+        * platform/mock/MockRealtimeMediaSourceCenter.cpp: Moved all of the mock device management
>+        code from MockRealtimeMediaSource.cpp here.
>+        (WebCore::defaultDevices):
>+        (WebCore::devices):
>+        (WebCore::deviceMap):
>+        (WebCore::deviceListForDevice):
>+        (WebCore::createCaptureDevice):
>+        (WebCore::MockRealtimeMediaSourceCenter::resetDevices):
>+        (WebCore::MockRealtimeMediaSourceCenter::setDevices):
>+        (WebCore::MockRealtimeMediaSourceCenter::addDevice):
>+        (WebCore::MockRealtimeMediaSourceCenter::removeDevice):
>+        (WebCore::MockRealtimeMediaSourceCenter::mockDeviceWithPersistentID):
>+        (WebCore::MockRealtimeMediaSourceCenter::captureDeviceWithPersistentID):
>+        (WebCore::MockRealtimeMediaSourceCenter::audioDevices):
>+        (WebCore::MockRealtimeMediaSourceCenter::videoDevices):
>+        (WebCore::MockRealtimeMediaSourceCenter::displayDevices):
>+
>+        * platform/mock/MockRealtimeVideoSource.cpp:
>+        (WebCore::MockRealtimeVideoSource::MockRealtimeVideoSource): Use RealtimeVideoSource, no
>+        more MockRealtimeMediaSource.
>+        (WebCore::MockRealtimeVideoSource::capabilities const): Ditto, cleanup.
>+        (WebCore::MockRealtimeVideoSource::settings const): Ditto.
>+        (WebCore::MockRealtimeVideoSource::settingsDidChange): Ditto.
>+        (WebCore::MockRealtimeVideoSource::startCaptureTimer): Ditto.
>+        (WebCore::MockRealtimeVideoSource::startProducingData): Ditto.
>+        (WebCore::MockRealtimeVideoSource::stopProducingData): Ditto.
>+        (WebCore::MockRealtimeVideoSource::elapsedTime): Ditto.
>+        (WebCore::MockRealtimeVideoSource::applySize): Ditto.
>+        (WebCore::MockRealtimeVideoSource::drawText): Render the actual frame rate.
>+        (WebCore::MockRealtimeVideoSource::generateFrame): Use m_fillColor.
>+        (WebCore::MockRealtimeVideoSource::~MockRealtimeVideoSource): Deleted.
>+        (WebCore::MockRealtimeVideoSource::updateSettings): Deleted.
>+        (WebCore::MockRealtimeVideoSource::initializeCapabilities): Deleted.
>+        (WebCore::MockRealtimeVideoSource::initializeSupportedConstraints): Deleted.
>+        (WebCore::MockRealtimeVideoSource::applyFrameRate): Deleted.
>+        * platform/mock/MockRealtimeVideoSource.h:
>+        (WebCore::MockRealtimeVideoSource::updateSampleBuffer): Deleted.
>+
> 2018-08-29  David Kilzer  <ddkilzer@apple.com>
> 
>         Remove empty directories from from svn.webkit.org repository
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index bf2a8bae103d8cb01315ad1a7889a54e455e8a61..58b5d76add4492ea23a9efdf9549c76d15e3e271 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,16 @@
>+2018-08-29  Eric Carlson  <eric.carlson@apple.com>
>+
>+        Mock video devices should only support discrete sizes
>+        https://bugs.webkit.org/show_bug.cgi?id=189000
>+        <rdar://problem/43766551>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * UIProcess/WebProcessPool.cpp:
>+        (WebKit::WebProcessPool::resetMockMediaDevices):
>+        * WebProcess/WebProcess.cpp:
>+        (WebKit::WebProcess::resetMockMediaDevices):
>+
> 2018-08-28  Don Olmstead  <don.olmstead@sony.com>
> 
>         [CMake] Use CMake's FindFreetype
>diff --git a/Source/WebCore/Sources.txt b/Source/WebCore/Sources.txt
>index aa8ccf7143bf3e6264b5140673f7454416bbb4ae..af2315a9af4ec6bda20ad317a9904dec32aa2960 100644
>--- a/Source/WebCore/Sources.txt
>+++ b/Source/WebCore/Sources.txt
>@@ -1745,6 +1745,7 @@ platform/mediastream/RealtimeMediaSourceCenter.cpp
> platform/mediastream/RealtimeMediaSourceSettings.cpp
> platform/mediastream/RealtimeOutgoingAudioSource.cpp
> platform/mediastream/RealtimeOutgoingVideoSource.cpp
>+platform/mediastream/RealtimeVideoSource.cpp
> 
> platform/mediastream/libwebrtc/LibWebRTCProvider.cpp
> 
>@@ -1753,7 +1754,6 @@ platform/mock/GeolocationClientMock.cpp
> platform/mock/MediaEngineDecodingConfigurationMock.cpp
> platform/mock/MediaEngineEncodingConfigurationMock.cpp
> platform/mock/MockRealtimeAudioSource.cpp
>-platform/mock/MockRealtimeMediaSource.cpp
> platform/mock/MockRealtimeMediaSourceCenter.cpp
> platform/mock/MockRealtimeVideoSource.cpp
> platform/mock/RTCDataChannelHandlerMock.cpp
>diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>index 8c0323ce85235a2ecda3c8659b01585cb84a9a7e..c48a13af5762f8cf439668042ceb0dd06d137ab0 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -104,6 +104,7 @@
> 		07277E5117D018CC0015534D /* JSMediaStreamEvent.h in Headers */ = {isa = PBXBuildFile; fileRef = 07277E4517D018CC0015534D /* JSMediaStreamEvent.h */; };
> 		07277E5317D018CC0015534D /* JSMediaStreamTrack.h in Headers */ = {isa = PBXBuildFile; fileRef = 07277E4717D018CC0015534D /* JSMediaStreamTrack.h */; };
> 		07277E5517D018CC0015534D /* JSMediaStreamTrackEvent.h in Headers */ = {isa = PBXBuildFile; fileRef = 07277E4917D018CC0015534D /* JSMediaStreamTrackEvent.h */; };
>+		072880D12010F1F60071B255 /* RealtimeVideoSource.h in Headers */ = {isa = PBXBuildFile; fileRef = 072880D02010EED70071B255 /* RealtimeVideoSource.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		072A70401D6E8F6200DF0AFC /* OverconstrainedErrorEvent.h in Headers */ = {isa = PBXBuildFile; fileRef = 072A703E1D6E8F6200DF0AFC /* OverconstrainedErrorEvent.h */; };
> 		072AE1E5183C0741000A5988 /* PluginReplacement.h in Headers */ = {isa = PBXBuildFile; fileRef = 072AE1DF183C0741000A5988 /* PluginReplacement.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		072AE1E8183C0741000A5988 /* QuickTimePluginReplacement.h in Headers */ = {isa = PBXBuildFile; fileRef = 072AE1E2183C0741000A5988 /* QuickTimePluginReplacement.h */; };
>@@ -208,7 +209,6 @@
> 		07C1C0E51BFB60ED00BD2256 /* RealtimeMediaSourceSupportedConstraints.h in Headers */ = {isa = PBXBuildFile; fileRef = 07C1C0E41BFB60ED00BD2256 /* RealtimeMediaSourceSupportedConstraints.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		07CE77D516712A6A00C55A47 /* InbandTextTrackPrivateClient.h in Headers */ = {isa = PBXBuildFile; fileRef = 07CE77D416712A6A00C55A47 /* InbandTextTrackPrivateClient.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		07D637401BB0B11300256CE9 /* WebAudioSourceProviderAVFObjC.h in Headers */ = {isa = PBXBuildFile; fileRef = 07D6373E1BB0B11300256CE9 /* WebAudioSourceProviderAVFObjC.h */; settings = {ATTRIBUTES = (Private, ); }; };
>-		07D6A4F01BECF2D200174146 /* MockRealtimeMediaSource.h in Headers */ = {isa = PBXBuildFile; fileRef = 07D6A4EE1BECF2D200174146 /* MockRealtimeMediaSource.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		07D6A4F41BED5F8800174146 /* MockRealtimeAudioSource.h in Headers */ = {isa = PBXBuildFile; fileRef = 07D6A4F21BED5F8800174146 /* MockRealtimeAudioSource.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		07D6A4F81BF2307D00174146 /* AudioTrackPrivateMediaStream.h in Headers */ = {isa = PBXBuildFile; fileRef = 07D6A4F61BF2307D00174146 /* AudioTrackPrivateMediaStream.h */; };
> 		07E3DFD11A9E786500764CA8 /* MediaPlaybackTarget.h in Headers */ = {isa = PBXBuildFile; fileRef = 07E3DFD01A9E786500764CA8 /* MediaPlaybackTarget.h */; settings = {ATTRIBUTES = (Private, ); }; };
>@@ -5288,6 +5288,8 @@
> 		07277E4817D018CC0015534D /* JSMediaStreamTrackEvent.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSMediaStreamTrackEvent.cpp; sourceTree = "<group>"; };
> 		07277E4917D018CC0015534D /* JSMediaStreamTrackEvent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JSMediaStreamTrackEvent.h; sourceTree = "<group>"; };
> 		072847E216EBC5B00043CFA4 /* PlatformTextTrack.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = PlatformTextTrack.h; sourceTree = "<group>"; };
>+		072880CE2010EED60071B255 /* RealtimeVideoSource.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = RealtimeVideoSource.cpp; sourceTree = "<group>"; };
>+		072880D02010EED70071B255 /* RealtimeVideoSource.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RealtimeVideoSource.h; sourceTree = "<group>"; };
> 		072A703E1D6E8F6200DF0AFC /* OverconstrainedErrorEvent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = OverconstrainedErrorEvent.h; sourceTree = "<group>"; };
> 		072A703F1D6E8F6200DF0AFC /* OverconstrainedErrorEvent.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = OverconstrainedErrorEvent.idl; sourceTree = "<group>"; };
> 		072AE1DF183C0741000A5988 /* PluginReplacement.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PluginReplacement.h; sourceTree = "<group>"; };
>@@ -5420,8 +5422,6 @@
> 		07CE77D416712A6A00C55A47 /* InbandTextTrackPrivateClient.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = InbandTextTrackPrivateClient.h; sourceTree = "<group>"; };
> 		07D6373E1BB0B11300256CE9 /* WebAudioSourceProviderAVFObjC.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebAudioSourceProviderAVFObjC.h; sourceTree = "<group>"; };
> 		07D6373F1BB0B11300256CE9 /* WebAudioSourceProviderAVFObjC.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = WebAudioSourceProviderAVFObjC.mm; sourceTree = "<group>"; };
>-		07D6A4ED1BECF2D200174146 /* MockRealtimeMediaSource.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = MockRealtimeMediaSource.cpp; sourceTree = "<group>"; };
>-		07D6A4EE1BECF2D200174146 /* MockRealtimeMediaSource.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MockRealtimeMediaSource.h; sourceTree = "<group>"; };
> 		07D6A4F11BED5F8800174146 /* MockRealtimeAudioSource.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = MockRealtimeAudioSource.cpp; sourceTree = "<group>"; };
> 		07D6A4F21BED5F8800174146 /* MockRealtimeAudioSource.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MockRealtimeAudioSource.h; sourceTree = "<group>"; };
> 		07D6A4F61BF2307D00174146 /* AudioTrackPrivateMediaStream.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = AudioTrackPrivateMediaStream.h; path = platform/mediastream/AudioTrackPrivateMediaStream.h; sourceTree = SOURCE_ROOT; };
>@@ -15180,6 +15180,8 @@
> 				41103AA81E39790A00769F03 /* RealtimeOutgoingAudioSource.h */,
> 				5CDD833B1E4324BB00621E92 /* RealtimeOutgoingVideoSource.cpp */,
> 				5CDD833C1E4324BB00621E92 /* RealtimeOutgoingVideoSource.h */,
>+				072880CE2010EED60071B255 /* RealtimeVideoSource.cpp */,
>+				072880D02010EED70071B255 /* RealtimeVideoSource.h */,
> 				3135910C1E7DDCB600F30630 /* RTCBundlePolicy.h */,
> 				07221BA217CF0AD400848E51 /* RTCDataChannelHandler.h */,
> 				07221BA317CF0AD400848E51 /* RTCDataChannelHandlerClient.h */,
>@@ -18755,8 +18757,6 @@
> 				413CCD4820DE013C0065A21A /* MockMediaDevice.h */,
> 				07D6A4F11BED5F8800174146 /* MockRealtimeAudioSource.cpp */,
> 				07D6A4F21BED5F8800174146 /* MockRealtimeAudioSource.h */,
>-				07D6A4ED1BECF2D200174146 /* MockRealtimeMediaSource.cpp */,
>-				07D6A4EE1BECF2D200174146 /* MockRealtimeMediaSource.h */,
> 				4A0FFA9B1AAF5E6C0062803B /* MockRealtimeMediaSourceCenter.cpp */,
> 				4A0FFA9C1AAF5E6C0062803B /* MockRealtimeMediaSourceCenter.h */,
> 				07EE76E91BE96DB000F89133 /* MockRealtimeVideoSource.cpp */,
>@@ -29396,7 +29396,6 @@
> 				CDF2B0131820540600F2B424 /* MockMediaPlayerMediaSource.h in Headers */,
> 				CDF2B0151820540600F2B424 /* MockMediaSourcePrivate.h in Headers */,
> 				07D6A4F41BED5F8800174146 /* MockRealtimeAudioSource.h in Headers */,
>-				07D6A4F01BECF2D200174146 /* MockRealtimeMediaSource.h in Headers */,
> 				4A0FFA9E1AAF5E7E0062803B /* MockRealtimeMediaSourceCenter.h in Headers */,
> 				07EE76EC1BE96DB000F89133 /* MockRealtimeVideoSource.h in Headers */,
> 				07EE76EF1BEA619800F89133 /* MockRealtimeVideoSourceMac.h in Headers */,
>@@ -29726,6 +29725,7 @@
> 				07C1C0E51BFB60ED00BD2256 /* RealtimeMediaSourceSupportedConstraints.h in Headers */,
> 				41103AAC1E39791000769F03 /* RealtimeOutgoingAudioSource.h in Headers */,
> 				41103AAC1E39791000769F14 /* RealtimeOutgoingAudioSourceCocoa.h in Headers */,
>+				072880D12010F1F60071B255 /* RealtimeVideoSource.h in Headers */,
> 				91B952241F58A58F00931DC2 /* RecordingSwizzleTypes.h in Headers */,
> 				BC4368E80C226E32005EFB5F /* Rect.h in Headers */,
> 				FD45A958175D414C00C21EC8 /* RectangleShape.h in Headers */,
>diff --git a/Source/WebCore/platform/mediastream/MediaConstraints.h b/Source/WebCore/platform/mediastream/MediaConstraints.h
>index 056fc7ee5e9687f47de529237a92bce410dd4e63..65e96aca9db172dd2728b3c5f159167df33c2b6e 100644
>--- a/Source/WebCore/platform/mediastream/MediaConstraints.h
>+++ b/Source/WebCore/platform/mediastream/MediaConstraints.h
>@@ -254,6 +254,8 @@ public:
>             ASSERT(validForRange(value, capabilityMax));
>             if (value > min)
>                 min = value;
>+            if (value < min)
>+                value = min;
> 
>             // If there is no ideal, don't change if minimum is smaller than current.
>             if (!m_ideal && value < current)
>@@ -265,6 +267,8 @@ public:
>             ASSERT(validForRange(capabilityMin, value));
>             if (value < max)
>                 max = value;
>+            if (value > max)
>+                value = max;
>         }
> 
>         if (m_ideal)
>diff --git a/Source/WebCore/platform/mediastream/RealtimeMediaSource.cpp b/Source/WebCore/platform/mediastream/RealtimeMediaSource.cpp
>index cadaf75e2a946b1556ceddf2ee17e3436eea1164..2e9d965a199b5b321ad3fe30e18188f22e2b41df 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeMediaSource.cpp
>+++ b/Source/WebCore/platform/mediastream/RealtimeMediaSource.cpp
>@@ -651,7 +651,19 @@ bool RealtimeMediaSource::selectSettings(const MediaConstraints& constraints, Fl
>         double constraintDistance = 0;
>         bool supported = false;
> 
>+        if (advancedConstraint.width() || advancedConstraint.height() || advancedConstraint.frameRate()) {
>+            String dummy;
>+            if (!supportsSizeAndFrameRate(advancedConstraint.width(), advancedConstraint.height(), advancedConstraint.frameRate(), dummy, constraintDistance))
>+                continue;
>+
>+            supported = true;
>+        }
>+
>         advancedConstraint.forEach([&](const MediaConstraint& constraint) {
>+
>+            if (constraint.constraintType() == MediaConstraintType::Width || constraint.constraintType() == MediaConstraintType::Height || constraint.constraintType() == MediaConstraintType::FrameRate)
>+                return;
>+
>             distance = fitnessDistance(constraint);
>             constraintDistance += distance;
>             if (!std::isinf(distance))
>@@ -848,6 +860,18 @@ void RealtimeMediaSource::applyConstraints(const MediaConstraints& constraints,
>         failureHandler(result.value().first, result.value().second);
> }
> 
>+void RealtimeMediaSource::setSize(const IntSize& size)
>+{
>+    if (size == m_size)
>+        return;
>+
>+    if (!applySize(size))
>+        return;
>+
>+    m_size = size;
>+    settingsDidChange();
>+}
>+
> void RealtimeMediaSource::setWidth(int width)
> {
>     if (width == m_size.width())
>diff --git a/Source/WebCore/platform/mediastream/RealtimeMediaSource.h b/Source/WebCore/platform/mediastream/RealtimeMediaSource.h
>index c29ab19c16df3b1fd01a0040b92fa5a723b48b0a..2793fac08accf6256a3181364322923f66db20a0 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeMediaSource.h
>+++ b/Source/WebCore/platform/mediastream/RealtimeMediaSource.h
>@@ -167,6 +167,7 @@ public:
> 
>     void setWidth(int);
>     void setHeight(int);
>+    void setSize(const IntSize&);
>     const IntSize& size() const { return m_size; }
>     virtual bool applySize(const IntSize&) { return false; }
> 
>@@ -247,7 +248,7 @@ protected:
>     void initializeSampleRate(int sampleRate) { m_sampleRate = sampleRate; }
>     void initializeEchoCancellation(bool echoCancellation) { m_echoCancellation = echoCancellation; }
> 
>-    void videoSampleAvailable(MediaSample&);
>+    virtual void videoSampleAvailable(MediaSample&);
>     void audioSamplesAvailable(const MediaTime&, const PlatformAudioData&, const AudioStreamDescription&, size_t);
> 
> private:
>diff --git a/Source/WebCore/platform/mediastream/RealtimeVideoSource.cpp b/Source/WebCore/platform/mediastream/RealtimeVideoSource.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..87f5fe6cbc3e86e83847bb3d633ece4e5d7deaf7
>--- /dev/null
>+++ b/Source/WebCore/platform/mediastream/RealtimeVideoSource.cpp
>@@ -0,0 +1,197 @@
>+/*
>+ * Copyright (C) 2013-2015 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
>+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
>+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
>+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
>+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
>+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
>+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include "config.h"
>+#include "RealtimeVideoSource.h"
>+
>+#if ENABLE(MEDIA_STREAM)
>+#include "CaptureDevice.h"
>+#include "Logging.h"
>+#include "RealtimeMediaSourceCenter.h"
>+#include "RealtimeMediaSourceSettings.h"
>+
>+namespace WebCore {
>+
>+RealtimeVideoSource::RealtimeVideoSource(const String& id, const String& name)
>+    : RealtimeMediaSource(id, Type::Video, name)
>+{
>+}
>+
>+RealtimeVideoSource::~RealtimeVideoSource()
>+{
>+#if PLATFORM(IOS)
>+    RealtimeMediaSourceCenter::singleton().videoFactory().unsetActiveSource(*this);
>+#endif
>+}
>+
>+void RealtimeVideoSource::startProducingData()
>+{
>+    ASSERT(frameRate());
>+
>+#if PLATFORM(IOS)
>+    RealtimeMediaSourceCenter::singleton().videoFactory().setActiveSource(*this);
>+#endif
>+
>+    if (size().isEmpty() && !m_defaultSize.isEmpty())
>+        setSize(m_defaultSize);
>+}
>+
>+void RealtimeVideoSource::setSupportedFrameRates(const Vector<double>&& rates)
>+{
>+    m_supportedFrameRates = rates;
>+    std::sort(m_supportedFrameRates.begin(), m_supportedFrameRates.end());
>+}
>+
>+void RealtimeVideoSource::addSupportedCapabilities(RealtimeMediaSourceCapabilities& capabilities) const
>+{
>+    if (!m_supportedFrameRates.size())
>+        capabilities.setFrameRate({ 30, 15 });
>+    else
>+        capabilities.setFrameRate({ m_supportedFrameRates[0], m_supportedFrameRates[m_supportedFrameRates.size() - 1] });
>+
>+    if (!m_supportedCaptureSizes.size()) {
>+        capabilities.setWidth({ 640 });
>+        capabilities.setHeight({ 480 });
>+        capabilities.setAspectRatio({ 1.33 });
>+
>+        return;
>+    }
>+
>+    int minimumWidth = std::numeric_limits<int>::max();
>+    int maximumWidth = 0;
>+    int minimumHeight = std::numeric_limits<int>::max();
>+    int maximumHeight = 0;
>+    float minimumAspectRatio = std::numeric_limits<float>::max();
>+    float maximumAspectRatio = 0;
>+    for (auto size : m_supportedCaptureSizes) {
>+        minimumWidth = std::min(minimumWidth, size.width());
>+        maximumWidth = std::max(maximumWidth, size.width());
>+
>+        minimumHeight = std::min(minimumHeight, size.height());
>+        maximumHeight = std::max(maximumHeight, size.height());
>+
>+        minimumAspectRatio = std::min(minimumAspectRatio, size.aspectRatio());
>+        maximumAspectRatio = std::max(maximumAspectRatio, size.aspectRatio());
>+    }
>+
>+    capabilities.setWidth({ minimumWidth, maximumWidth });
>+    capabilities.setHeight({ minimumHeight, maximumHeight });
>+    capabilities.setAspectRatio({ minimumAspectRatio, maximumAspectRatio });
>+}
>+
>+bool RealtimeVideoSource::supportsSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double> frameRate)
>+{
>+    if (!height && !width && !frameRate)
>+        return true;
>+
>+    if (height || width) {
>+        if (!m_supportedCaptureSizes.size())
>+            return false;
>+
>+        IntSize supportedSize = bestSupportedCaptureSizeForWidthAndHeight(width, height);
>+        if (supportedSize.isEmpty())
>+            return false;
>+    }
>+
>+    if (!frameRate)
>+        return true;
>+
>+    return supportsFrameRate(frameRate.value());
>+}
>+
>+IntSize RealtimeVideoSource::bestSupportedCaptureSizeForWidthAndHeight(std::optional<int> width, std::optional<int> height)
>+{
>+    if (!width && !height)
>+        return { };
>+
>+    for (auto size : m_supportedCaptureSizes) {
>+        if ((!width || width.value() == size.width()) && (!height || height.value() == size.height()))
>+            return size;
>+    }
>+
>+    return { };
>+}
>+
>+bool RealtimeVideoSource::applySize(const IntSize& size)
>+{
>+    IntSize supportedSize = bestSupportedCaptureSizeForWidthAndHeight(size.width(), size.height());
>+    if (supportedSize.isEmpty()) {
>+        LOG(Media, "RealtimeVideoSource::applySize(%p), unable find or set preset for width: %i, height: %i", this, size.width(), size.height());
>+        return false;
>+    }
>+
>+    return true;
>+}
>+
>+void RealtimeVideoSource::applySizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double> frameRate)
>+{
>+    if (width || height) {
>+        IntSize supportedSize = bestSupportedCaptureSizeForWidthAndHeight(WTFMove(width), WTFMove(height));
>+        ASSERT(!supportedSize.isEmpty());
>+        if (!supportedSize.isEmpty())
>+            setSize(supportedSize);
>+    }
>+
>+    if (frameRate)
>+        setFrameRate(frameRate.value());
>+}
>+
>+void RealtimeVideoSource::dispatchMediaSampleToObservers(MediaSample& sample)
>+{
>+    MediaTime sampleTime = sample.outputPresentationTime();
>+    if (!sampleTime || !sampleTime.isValid())
>+        sampleTime = sample.presentationTime();
>+
>+    auto frameTime = sampleTime.toDouble();
>+    m_observedFrameTimeStamps.append(frameTime);
>+    m_observedFrameTimeStamps.removeAllMatching([&](auto time) {
>+        return time <= frameTime - 2;
>+    });
>+
>+    auto interval = m_observedFrameTimeStamps.last() - m_observedFrameTimeStamps.first();
>+    if (interval > 1)
>+        m_observedFrameRate = (m_observedFrameTimeStamps.size() / interval);
>+
>+    videoSampleAvailable(sample);
>+}
>+
>+bool RealtimeVideoSource::applyFrameRate(double rate)
>+{
>+    return supportsFrameRate(rate);
>+}
>+
>+bool RealtimeVideoSource::supportsFrameRate(double frameRate)
>+{
>+    double epsilon = 0.001;
>+    for (auto rate : m_supportedFrameRates) {
>+        if (frameRate + epsilon >= rate && frameRate - epsilon <= rate)
>+            return true;
>+    }
>+    return false;
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(MEDIA_STREAM)
>diff --git a/Source/WebCore/platform/mediastream/RealtimeVideoSource.h b/Source/WebCore/platform/mediastream/RealtimeVideoSource.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..854bc2529c79eaa788548346f5aefb1d086a59ed
>--- /dev/null
>+++ b/Source/WebCore/platform/mediastream/RealtimeVideoSource.h
>@@ -0,0 +1,77 @@
>+/*
>+ * Copyright (C) 2013-2015 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
>+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
>+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
>+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
>+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
>+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
>+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(MEDIA_STREAM)
>+
>+#include "FontCascade.h"
>+#include "ImageBuffer.h"
>+#include "MediaSample.h"
>+#include "RealtimeMediaSource.h"
>+#include <wtf/Lock.h>
>+#include <wtf/RunLoop.h>
>+
>+namespace WebCore {
>+
>+class RealtimeVideoSource : public RealtimeMediaSource {
>+public:
>+    virtual ~RealtimeVideoSource();
>+
>+protected:
>+    RealtimeVideoSource(const String& id, const String& name);
>+
>+    void startProducingData() override;
>+    bool supportsSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double>) override;
>+    void applySizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double>) override;
>+    bool applySize(const IntSize&) override;
>+    bool applyFrameRate(double) override;
>+
>+    void setSupportedFrameRates(const Vector<double>&&);
>+    void setSupportedCaptureSizes(const Vector<IntSize>&& sizes) { m_supportedCaptureSizes = sizes; }
>+    IntSize bestSupportedCaptureSizeForWidthAndHeight(std::optional<int> width, std::optional<int> height);
>+
>+    void addSupportedCapabilities(RealtimeMediaSourceCapabilities&) const;
>+
>+    void setDefaultSize(const IntSize& size) { m_defaultSize = size; }
>+
>+    double observedFrameRate() const { return m_observedFrameRate; }
>+
>+    void dispatchMediaSampleToObservers(MediaSample&);
>+
>+private:
>+    bool supportsFrameRate(double);
>+
>+    Vector<IntSize> m_supportedCaptureSizes;
>+    Vector<double> m_supportedFrameRates;
>+    Deque<double> m_observedFrameTimeStamps;
>+    double m_observedFrameRate { 0 };
>+    IntSize m_defaultSize;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(MEDIA_STREAM)
>+
>diff --git a/Source/WebCore/platform/mediastream/mac/AVMediaCaptureSource.mm b/Source/WebCore/platform/mediastream/mac/AVMediaCaptureSource.mm
>index 9824aa754b2139b545e787c3b5211bc3e0382b28..2c114eb9bedbfd2c118915b251add623ba4e1c45 100644
>--- a/Source/WebCore/platform/mediastream/mac/AVMediaCaptureSource.mm
>+++ b/Source/WebCore/platform/mediastream/mac/AVMediaCaptureSource.mm
>@@ -213,7 +213,6 @@ void AVMediaCaptureSource::initializeSettings()
>         m_currentSettings.setSupportedConstraints(supportedConstraints());
> 
>     m_currentSettings.setDeviceId(id());
>-    m_currentSettings.setLabel(name());
>     updateSettings(m_currentSettings);
> }
> 
>diff --git a/Source/WebCore/platform/mediastream/mac/MockRealtimeVideoSourceMac.mm b/Source/WebCore/platform/mediastream/mac/MockRealtimeVideoSourceMac.mm
>index 7e7ca7d72e6e6bfaa95369d2f8591855f37bcde1..020ffa9ea2396aa93be6c439c7a64c0337bb0902 100644
>--- a/Source/WebCore/platform/mediastream/mac/MockRealtimeVideoSourceMac.mm
>+++ b/Source/WebCore/platform/mediastream/mac/MockRealtimeVideoSourceMac.mm
>@@ -151,15 +151,16 @@ void MockRealtimeVideoSourceMac::updateSampleBuffer()
>     auto sampleBuffer = CMSampleBufferFromPixelBuffer(pixelBuffer.get());
> 
>     // We use m_deviceOrientation to emulate sensor orientation
>-    videoSampleAvailable(MediaSampleAVFObjC::create(sampleBuffer.get(), m_deviceOrientation));
>+    dispatchMediaSampleToObservers(MediaSampleAVFObjC::create(sampleBuffer.get(), m_deviceOrientation));
> }
> 
> bool MockRealtimeVideoSourceMac::applySize(const IntSize& newSize)
> {
>-    if (size() != newSize)
>-        m_bufferPool = nullptr;
>+    if (!MockRealtimeVideoSource::applySize(newSize))
>+        return false;
> 
>-    return MockRealtimeVideoSource::applySize(newSize);
>+    m_bufferPool = nullptr;
>+    return true;
> }
> 
> void MockRealtimeVideoSourceMac::orientationChanged(int orientation)
>diff --git a/Source/WebCore/platform/mock/MockMediaDevice.h b/Source/WebCore/platform/mock/MockMediaDevice.h
>index 882dbaf10e7d6ada06656ce1871cd20ea5b84e4a..8e777cff2e2d6d0544a375dbbd186132f0f70bcf 100644
>--- a/Source/WebCore/platform/mock/MockMediaDevice.h
>+++ b/Source/WebCore/platform/mock/MockMediaDevice.h
>@@ -60,7 +60,9 @@ struct MockCameraProperties {
>     void encode(Encoder& encoder) const
>     {
>         encoder << defaultFrameRate;
>-        encoder << facingModeCapability;
>+        encoder << facingMode;
>+        encoder << frameRates;
>+        encoder << frameSizes;
>     }
> 
>     template <class Decoder>
>@@ -71,16 +73,28 @@ struct MockCameraProperties {
>         if (!defaultFrameRate)
>             return std::nullopt;
> 
>-        std::optional<RealtimeMediaSourceSettings::VideoFacingMode> facingModeCapability;
>-        decoder >> facingModeCapability;
>-        if (!facingModeCapability)
>+        std::optional<RealtimeMediaSourceSettings::VideoFacingMode> facingMode;
>+        decoder >> facingMode;
>+        if (!facingMode)
>             return std::nullopt;
> 
>-        return MockCameraProperties { *defaultFrameRate, *facingModeCapability, Color::black };
>+        std::optional<Vector<double>> frameRates;
>+        decoder >> frameRates;
>+        if (!frameRates)
>+            return std::nullopt;
>+
>+        std::optional<Vector<IntSize>> frameSizes;
>+        decoder >> frameSizes;
>+        if (!frameSizes)
>+            return std::nullopt;
>+
>+        return MockCameraProperties { *defaultFrameRate, *facingMode, *frameRates, *frameSizes, Color::black };
>     }
> 
>     double defaultFrameRate { 30 };
>-    RealtimeMediaSourceSettings::VideoFacingMode facingModeCapability { RealtimeMediaSourceSettings::VideoFacingMode::User };
>+    RealtimeMediaSourceSettings::VideoFacingMode facingMode { RealtimeMediaSourceSettings::VideoFacingMode::User };
>+    Vector<double> frameRates { 30, 15 };
>+    Vector<IntSize> frameSizes { { 640, 480 }, { 352, 288 }, { 320, 240 } };
>     Color fillColor { Color::black };
> };
> 
>diff --git a/Source/WebCore/platform/mock/MockRealtimeAudioSource.cpp b/Source/WebCore/platform/mock/MockRealtimeAudioSource.cpp
>index 002caf31236ecb646bf82441182cb1508746c002..02011c2d8869c5453f9bcb4bb20ad3b231c621bd 100644
>--- a/Source/WebCore/platform/mock/MockRealtimeAudioSource.cpp
>+++ b/Source/WebCore/platform/mock/MockRealtimeAudioSource.cpp
>@@ -1,5 +1,5 @@
> /*
>- * Copyright (C) 2015-2017 Apple Inc. All rights reserved.
>+ * Copyright (C) 2015-2018 Apple Inc. All rights reserved.
>  *
>  * Redistribution and use in source and binary forms, with or without
>  * modification, are permitted provided that the following conditions
>@@ -47,7 +47,7 @@ class MockRealtimeAudioSourceFactory : public RealtimeMediaSource::AudioCaptureF
> public:
>     CaptureSourceOrError createAudioCaptureSource(const CaptureDevice& device, const MediaConstraints* constraints) final
>     {
>-        for (auto& mockDevice : MockRealtimeMediaSource::audioDevices()) {
>+        for (auto& mockDevice : MockRealtimeMediaSourceCenter::audioDevices()) {
>             if (mockDevice.persistentId() == device.persistentId())
>                 return MockRealtimeAudioSource::create(mockDevice.persistentId(), mockDevice.label(), constraints);
>         }
>@@ -78,9 +78,12 @@ RealtimeMediaSource::AudioCaptureFactory& MockRealtimeAudioSource::factory()
> }
> 
> MockRealtimeAudioSource::MockRealtimeAudioSource(const String& deviceID, const String& name)
>-    : MockRealtimeMediaSource(deviceID, RealtimeMediaSource::Type::Audio, name)
>+    : RealtimeMediaSource(deviceID, RealtimeMediaSource::Type::Audio, name)
>     , m_timer(RunLoop::current(), this, &MockRealtimeAudioSource::tick)
> {
>+    auto device = MockRealtimeMediaSourceCenter::mockDeviceWithPersistentID(deviceID);
>+    ASSERT(device);
>+    m_device = *device;
> }
> 
> MockRealtimeAudioSource::~MockRealtimeAudioSource()
>@@ -90,25 +93,46 @@ MockRealtimeAudioSource::~MockRealtimeAudioSource()
> #endif
> }
> 
>-void MockRealtimeAudioSource::updateSettings(RealtimeMediaSourceSettings& settings)
>+const RealtimeMediaSourceSettings& MockRealtimeAudioSource::settings() const
> {
>-    settings.setVolume(volume());
>-    settings.setEchoCancellation(echoCancellation());
>-    settings.setSampleRate(sampleRate());
>+    if (!m_currentSettings) {
>+        RealtimeMediaSourceSettings settings;
>+        settings.setDeviceId(id());
>+        settings.setVolume(volume());
>+        settings.setEchoCancellation(echoCancellation());
>+        settings.setSampleRate(sampleRate());
>+
>+        RealtimeMediaSourceSupportedConstraints supportedConstraints;
>+        supportedConstraints.setSupportsDeviceId(true);
>+        supportedConstraints.setSupportsVolume(true);
>+        supportedConstraints.setSupportsEchoCancellation(true);
>+        supportedConstraints.setSupportsSampleRate(true);
>+        settings.setSupportedConstraints(supportedConstraints);
>+
>+        m_currentSettings = WTFMove(settings);
>+    }
>+    return m_currentSettings.value();
> }
> 
>-void MockRealtimeAudioSource::initializeCapabilities(RealtimeMediaSourceCapabilities& capabilities)
>+const RealtimeMediaSourceCapabilities& MockRealtimeAudioSource::capabilities() const
> {
>-    capabilities.setVolume(CapabilityValueOrRange(0.0, 1.0));
>-    capabilities.setEchoCancellation(RealtimeMediaSourceCapabilities::EchoCancellation::ReadWrite);
>-    capabilities.setSampleRate(CapabilityValueOrRange(44100, 48000));
>+    if (!m_capabilities) {
>+        RealtimeMediaSourceCapabilities capabilities(settings().supportedConstraints());
>+
>+        capabilities.setDeviceId(id());
>+        capabilities.setVolume(CapabilityValueOrRange(0.0, 1.0));
>+        capabilities.setEchoCancellation(RealtimeMediaSourceCapabilities::EchoCancellation::ReadWrite);
>+        capabilities.setSampleRate(CapabilityValueOrRange(44100, 48000));
>+
>+        m_capabilities = WTFMove(capabilities);
>+    }
>+    return m_capabilities.value();
> }
> 
>-void MockRealtimeAudioSource::initializeSupportedConstraints(RealtimeMediaSourceSupportedConstraints& supportedConstraints)
>+void MockRealtimeAudioSource::settingsDidChange()
> {
>-    supportedConstraints.setSupportsVolume(true);
>-    supportedConstraints.setSupportsEchoCancellation(true);
>-    supportedConstraints.setSupportsSampleRate(true);
>+    m_currentSettings = std::nullopt;
>+    RealtimeMediaSource::settingsDidChange();
> }
> 
> void MockRealtimeAudioSource::startProducingData()
>@@ -118,7 +142,7 @@ void MockRealtimeAudioSource::startProducingData()
> #endif
> 
>     if (!sampleRate())
>-        setSampleRate(WTF::get<MockMicrophoneProperties>(device().properties).defaultSampleRate);
>+        setSampleRate(WTF::get<MockMicrophoneProperties>(m_device.properties).defaultSampleRate);
> 
>     m_startTime = MonotonicTime::now();
>     m_timer.startRepeating(renderInterval());
>@@ -127,18 +151,9 @@ void MockRealtimeAudioSource::startProducingData()
> void MockRealtimeAudioSource::stopProducingData()
> {
>     m_timer.stop();
>-    m_elapsedTime += MonotonicTime::now() - m_startTime;
>     m_startTime = MonotonicTime::nan();
> }
> 
>-Seconds MockRealtimeAudioSource::elapsedTime()
>-{
>-    if (std::isnan(m_startTime))
>-        return m_elapsedTime;
>-
>-    return m_elapsedTime + (MonotonicTime::now() - m_startTime);
>-}
>-
> void MockRealtimeAudioSource::tick()
> {
>     if (std::isnan(m_lastRenderTime))
>diff --git a/Source/WebCore/platform/mock/MockRealtimeAudioSource.h b/Source/WebCore/platform/mock/MockRealtimeAudioSource.h
>index 381a444cef604a9d3022ea0ef800e6fea463c8b0..443dd073f0b43bc562b4a7c1a039d32065156397 100644
>--- a/Source/WebCore/platform/mock/MockRealtimeAudioSource.h
>+++ b/Source/WebCore/platform/mock/MockRealtimeAudioSource.h
>@@ -1,5 +1,5 @@
> /*
>- * Copyright (C) 2015-2017 Apple Inc. All rights reserved.
>+ * Copyright (C) 2015-2018 Apple Inc. All rights reserved.
>  *
>  * Redistribution and use in source and binary forms, with or without
>  * modification, are permitted provided that the following conditions
>@@ -33,12 +33,12 @@
> #if ENABLE(MEDIA_STREAM)
> 
> #include "ImageBuffer.h"
>-#include "MockRealtimeMediaSource.h"
>+#include "MockMediaDevice.h"
> #include <wtf/RunLoop.h>
> 
> namespace WebCore {
> 
>-class MockRealtimeAudioSource : public MockRealtimeMediaSource {
>+class MockRealtimeAudioSource : public RealtimeMediaSource {
> public:
> 
>     static CaptureSourceOrError create(const String& deviceID, const String& name, const MediaConstraints*);
>@@ -55,19 +55,17 @@ protected:
> 
>     virtual void render(Seconds) { }
> 
>-    Seconds elapsedTime();
>     static Seconds renderInterval() { return 60_ms; }
> 
> private:
>-
>     bool applyVolume(double) override { return true; }
>     bool applySampleRate(int) override { return true; }
>     bool applySampleSize(int) override { return true; }
>     bool applyEchoCancellation(bool) override { return true; }
> 
>-    void updateSettings(RealtimeMediaSourceSettings&) override;
>-    void initializeCapabilities(RealtimeMediaSourceCapabilities&) override;
>-    void initializeSupportedConstraints(RealtimeMediaSourceSupportedConstraints&) override;
>+    const RealtimeMediaSourceCapabilities& capabilities() const final;
>+    const RealtimeMediaSourceSettings& settings() const final;
>+    void settingsDidChange() final;
> 
>     void tick();
> 
>@@ -75,11 +73,16 @@ private:
> 
>     void delaySamples(Seconds) final;
> 
>+    mutable std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
>+    mutable std::optional<RealtimeMediaSourceSettings> m_currentSettings;
>+    RealtimeMediaSourceSupportedConstraints m_supportedConstraints;
>+
>     RunLoop::Timer<MockRealtimeAudioSource> m_timer;
>     MonotonicTime m_startTime { MonotonicTime::nan() };
>     MonotonicTime m_lastRenderTime { MonotonicTime::nan() };
>     Seconds m_elapsedTime { 0_s };
>     MonotonicTime m_delayUntil;
>+    MockMediaDevice m_device;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/platform/mock/MockRealtimeMediaSource.cpp b/Source/WebCore/platform/mock/MockRealtimeMediaSource.cpp
>deleted file mode 100644
>index ec441efd75e9387676655bd025d937b5387737a3..0000000000000000000000000000000000000000
>--- a/Source/WebCore/platform/mock/MockRealtimeMediaSource.cpp
>+++ /dev/null
>@@ -1,255 +0,0 @@
>-/*
>- * Copyright (C) 2015 Apple Inc. All rights reserved.
>- *
>- * Redistribution and use in source and binary forms, with or without
>- * modification, are permitted provided that the following conditions
>- * are met:
>- *
>- * 1. Redistributions of source code must retain the above copyright
>- *    notice, this list of conditions and the following disclaimer.
>- * 2. Redistributions in binary form must reproduce the above copyright
>- *    notice, this list of conditions and the following disclaimer
>- *    in the documentation and/or other materials provided with the
>- *    distribution.
>- * 3. Neither the name of Google Inc. nor the names of its contributors
>- *    may be used to endorse or promote products derived from this
>- *    software without specific prior written permission.
>- *
>- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
>- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
>- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
>- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
>- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
>- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
>- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
>- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
>- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
>- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>- */
>-
>-#include "config.h"
>-#include "MockRealtimeMediaSource.h"
>-
>-#if ENABLE(MEDIA_STREAM)
>-
>-#include "CaptureDevice.h"
>-#include "Logging.h"
>-#include "MediaConstraints.h"
>-#include "NotImplemented.h"
>-#include "RealtimeMediaSourceSettings.h"
>-#include <math.h>
>-#include <wtf/NeverDestroyed.h>
>-#include <wtf/text/StringView.h>
>-
>-namespace WebCore {
>-
>-static inline Vector<MockMediaDevice> defaultDevices()
>-{
>-    return Vector<MockMediaDevice> {
>-        MockMediaDevice { "239c24b0-2b15-11e3-8224-0800200c9a66"_s, "Mock audio device 1"_s, MockMicrophoneProperties { 44100 } },
>-        MockMediaDevice { "239c24b1-2b15-11e3-8224-0800200c9a66"_s, "Mock audio device 2"_s, MockMicrophoneProperties { 48000 } },
>-
>-        MockMediaDevice { "239c24b2-2b15-11e3-8224-0800200c9a66"_s, "Mock video device 1"_s, MockCameraProperties { 30, RealtimeMediaSourceSettings::VideoFacingMode::User, Color::black } },
>-        MockMediaDevice { "239c24b3-2b15-11e3-8224-0800200c9a66"_s, "Mock video device 2"_s, MockCameraProperties { 15, RealtimeMediaSourceSettings::VideoFacingMode::Environment, Color::darkGray } },
>-
>-        MockMediaDevice { "SCREEN-1"_s, "Mock screen device 1"_s, MockDisplayProperties { 30, Color::lightGray } },
>-        MockMediaDevice { "SCREEN-2"_s, "Mock screen device 2"_s, MockDisplayProperties { 10, Color::yellow } }
>-    };
>-}
>-
>-static Vector<MockMediaDevice>& devices()
>-{
>-    static auto devices = makeNeverDestroyed([] {
>-        return defaultDevices();
>-    }());
>-    return devices;
>-}
>-
>-static HashMap<String, MockMediaDevice>& deviceMap()
>-{
>-    static auto map = makeNeverDestroyed([] {
>-        HashMap<String, MockMediaDevice> map;
>-        for (auto& device : devices())
>-            map.add(device.persistentId, device);
>-
>-        return map;
>-    }());
>-    return map;
>-}
>-
>-static inline Vector<CaptureDevice>& deviceListForDevice(const MockMediaDevice& device)
>-{
>-    if (device.isMicrophone())
>-        return MockRealtimeAudioSource::audioDevices();
>-    if (device.isCamera())
>-        return MockRealtimeAudioSource::videoDevices();
>-
>-    ASSERT(device.isDisplay());
>-    return MockRealtimeAudioSource::displayDevices();
>-}
>-
>-void MockRealtimeMediaSource::createCaptureDevice(const MockMediaDevice& device)
>-{
>-    deviceListForDevice(device).append(captureDeviceWithPersistentID(device.type(), device.persistentId).value());
>-}
>-
>-void MockRealtimeMediaSource::resetDevices()
>-{
>-    setDevices(defaultDevices());
>-    RealtimeMediaSourceCenter::singleton().captureDevicesChanged();
>-}
>-
>-void MockRealtimeMediaSource::setDevices(Vector<MockMediaDevice>&& newMockDevices)
>-{
>-    audioDevices().clear();
>-    videoDevices().clear();
>-    displayDevices().clear();
>-
>-    auto& mockDevices = devices();
>-    mockDevices = WTFMove(newMockDevices);
>-
>-    auto& map = deviceMap();
>-    map.clear();
>-
>-    for (const auto& device : mockDevices) {
>-        map.add(device.persistentId, device);
>-        createCaptureDevice(device);
>-    }
>-    RealtimeMediaSourceCenter::singleton().captureDevicesChanged();
>-}
>-
>-void MockRealtimeMediaSource::addDevice(const MockMediaDevice& device)
>-{
>-    devices().append(device);
>-    deviceMap().set(device.persistentId, device);
>-    createCaptureDevice(device);
>-    RealtimeMediaSourceCenter::singleton().captureDevicesChanged();
>-}
>-
>-void MockRealtimeMediaSource::removeDevice(const String& persistentId)
>-{
>-    auto& map = deviceMap();
>-    auto iterator = map.find(persistentId);
>-    if (iterator == map.end())
>-        return;
>-
>-    devices().removeFirstMatching([&persistentId](const auto& device) {
>-        return device.persistentId == persistentId;
>-    });
>-
>-    deviceListForDevice(iterator->value).removeFirstMatching([&persistentId](const auto& device) {
>-        return device.persistentId() == persistentId;
>-    });
>-
>-    map.remove(iterator);
>-    RealtimeMediaSourceCenter::singleton().captureDevicesChanged();
>-}
>-
>-std::optional<CaptureDevice> MockRealtimeMediaSource::captureDeviceWithPersistentID(CaptureDevice::DeviceType type, const String& id)
>-{
>-    ASSERT(!id.isEmpty());
>-
>-    auto& map = deviceMap();
>-    auto iterator = map.find(id);
>-    if (iterator == map.end() || iterator->value.type() != type)
>-        return std::nullopt;
>-
>-    CaptureDevice device { iterator->value.persistentId, type, iterator->value.label };
>-    device.setEnabled(true);
>-    return WTFMove(device);
>-}
>-
>-Vector<CaptureDevice>& MockRealtimeMediaSource::audioDevices()
>-{
>-    static auto audioDevices = makeNeverDestroyed([] {
>-        Vector<CaptureDevice> audioDevices;
>-        for (const auto& device : devices()) {
>-            if (device.type() == CaptureDevice::DeviceType::Microphone)
>-                audioDevices.append(captureDeviceWithPersistentID(CaptureDevice::DeviceType::Microphone, device.persistentId).value());
>-        }
>-        return audioDevices;
>-    }());
>-    return audioDevices;
>-}
>-
>-Vector<CaptureDevice>& MockRealtimeMediaSource::videoDevices()
>-{
>-    static auto videoDevices = makeNeverDestroyed([] {
>-        Vector<CaptureDevice> videoDevices;
>-        for (const auto& device : devices()) {
>-            if (device.type() == CaptureDevice::DeviceType::Camera)
>-                videoDevices.append(captureDeviceWithPersistentID(CaptureDevice::DeviceType::Camera, device.persistentId).value());
>-        }
>-        return videoDevices;
>-    }());
>-    return videoDevices;
>-}
>-
>-Vector<CaptureDevice>& MockRealtimeMediaSource::displayDevices()
>-{
>-    static auto displayDevices = makeNeverDestroyed([] {
>-        Vector<CaptureDevice> displayDevices;
>-        for (const auto& device : devices()) {
>-            if (device.type() == CaptureDevice::DeviceType::Screen)
>-                displayDevices.append(captureDeviceWithPersistentID(CaptureDevice::DeviceType::Screen, device.persistentId).value());
>-        }
>-        return displayDevices;
>-    }());
>-
>-    return displayDevices;
>-}
>-
>-MockRealtimeMediaSource::MockRealtimeMediaSource(const String& id, RealtimeMediaSource::Type type, const String& name)
>-    : RealtimeMediaSource(id, type, name)
>-    , m_device(deviceMap().get(id))
>-{
>-    ASSERT(type != RealtimeMediaSource::Type::None);
>-    setPersistentID(String(id));
>-}
>-
>-void MockRealtimeMediaSource::initializeCapabilities()
>-{
>-    m_capabilities = std::make_unique<RealtimeMediaSourceCapabilities>(supportedConstraints());
>-    m_capabilities->setDeviceId(id());
>-    initializeCapabilities(*m_capabilities.get());
>-}
>-
>-const RealtimeMediaSourceCapabilities& MockRealtimeMediaSource::capabilities() const
>-{
>-    if (!m_capabilities)
>-        const_cast<MockRealtimeMediaSource&>(*this).initializeCapabilities();
>-    return *m_capabilities;
>-}
>-
>-void MockRealtimeMediaSource::initializeSettings()
>-{
>-    if (m_currentSettings.deviceId().isEmpty()) {
>-        m_currentSettings.setSupportedConstraints(supportedConstraints());
>-        m_currentSettings.setDeviceId(id());
>-        m_currentSettings.setLabel(name());
>-    }
>-
>-    updateSettings(m_currentSettings);
>-}
>-
>-const RealtimeMediaSourceSettings& MockRealtimeMediaSource::settings() const
>-{
>-    const_cast<MockRealtimeMediaSource&>(*this).initializeSettings();
>-    return m_currentSettings;
>-}
>-
>-RealtimeMediaSourceSupportedConstraints& MockRealtimeMediaSource::supportedConstraints()
>-{
>-    if (m_supportedConstraints.supportsDeviceId())
>-        return m_supportedConstraints;
>-
>-    m_supportedConstraints.setSupportsDeviceId(true);
>-    initializeSupportedConstraints(m_supportedConstraints);
>-
>-    return m_supportedConstraints;
>-}
>-
>-} // namespace WebCore
>-
>-#endif // ENABLE(MEDIA_STREAM)
>diff --git a/Source/WebCore/platform/mock/MockRealtimeMediaSource.h b/Source/WebCore/platform/mock/MockRealtimeMediaSource.h
>deleted file mode 100644
>index 3355da661ec60e9df1a251c000ab56971cf8cb1c..0000000000000000000000000000000000000000
>--- a/Source/WebCore/platform/mock/MockRealtimeMediaSource.h
>+++ /dev/null
>@@ -1,84 +0,0 @@
>-/*
>- * Copyright (C) 2015 Apple Inc. All rights reserved.
>- *
>- * Redistribution and use in source and binary forms, with or without
>- * modification, are permitted provided that the following conditions
>- * are met:
>- *
>- * 1. Redistributions of source code must retain the above copyright
>- *    notice, this list of conditions and the following disclaimer.
>- * 2. Redistributions in binary form must reproduce the above copyright
>- *    notice, this list of conditions and the following disclaimer
>- *    in the documentation and/or other materials provided with the
>- *    distribution.
>- * 3. Neither the name of Ericsson nor the names of its contributors
>- *    may be used to endorse or promote products derived from this
>- *    software without specific prior written permission.
>- *
>- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
>- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
>- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
>- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
>- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
>- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
>- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
>- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
>- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
>- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>- */
>-
>-#pragma once
>-
>-#if ENABLE(MEDIA_STREAM)
>-
>-#include "CaptureDevice.h"
>-#include "MockMediaDevice.h"
>-#include "RealtimeMediaSource.h"
>-
>-namespace WebCore {
>-
>-class MockRealtimeMediaSource : public RealtimeMediaSource {
>-public:
>-    virtual ~MockRealtimeMediaSource() = default;
>-
>-    static void setDevices(Vector<MockMediaDevice>&&);
>-    static void addDevice(const MockMediaDevice&);
>-    static void removeDevice(const String& persistentId);
>-    WEBCORE_EXPORT static void resetDevices();
>-
>-    static Vector<CaptureDevice>& audioDevices();
>-    static Vector<CaptureDevice>& videoDevices();
>-    static Vector<CaptureDevice>& displayDevices();
>-
>-    static std::optional<CaptureDevice> captureDeviceWithPersistentID(CaptureDevice::DeviceType, const String&);
>-
>-protected:
>-    MockRealtimeMediaSource(const String& id, Type, const String& name);
>-
>-    static void createCaptureDevice(const MockMediaDevice&);
>-
>-    virtual void updateSettings(RealtimeMediaSourceSettings&) = 0;
>-    virtual void initializeCapabilities(RealtimeMediaSourceCapabilities&) = 0;
>-    virtual void initializeSupportedConstraints(RealtimeMediaSourceSupportedConstraints&) = 0;
>-
>-    const RealtimeMediaSourceCapabilities& capabilities() const override;
>-    const RealtimeMediaSourceSettings& settings() const override;
>-
>-    RealtimeMediaSourceSupportedConstraints& supportedConstraints();
>-
>-    const MockMediaDevice& device() const { return m_device; }
>-    MockMediaDevice m_device;
>-
>-private:
>-    void initializeCapabilities();
>-    void initializeSettings();
>-
>-    RealtimeMediaSourceSettings m_currentSettings;
>-    RealtimeMediaSourceSupportedConstraints m_supportedConstraints;
>-    std::unique_ptr<RealtimeMediaSourceCapabilities> m_capabilities;
>-};
>-
>-} // namespace WebCore
>-
>-#endif // ENABLE(MEDIA_STREAM)
>diff --git a/Source/WebCore/platform/mock/MockRealtimeMediaSourceCenter.cpp b/Source/WebCore/platform/mock/MockRealtimeMediaSourceCenter.cpp
>index db68821e31d2ce27d8be18dfd57e06fe3056a395..d9ab7331e26d675015011a888dde76752da9555a 100644
>--- a/Source/WebCore/platform/mock/MockRealtimeMediaSourceCenter.cpp
>+++ b/Source/WebCore/platform/mock/MockRealtimeMediaSourceCenter.cpp
>@@ -30,13 +30,79 @@
> 
> #if ENABLE(MEDIA_STREAM)
> 
>+#include "CaptureDevice.h"
> #include "Logging.h"
>+#include "MediaConstraints.h"
> #include "MockRealtimeAudioSource.h"
> #include "MockRealtimeVideoSource.h"
>+#include "NotImplemented.h"
>+#include "RealtimeMediaSourceSettings.h"
>+#include <math.h>
> #include <wtf/NeverDestroyed.h>
>+#include <wtf/text/StringView.h>
> 
> namespace WebCore {
> 
>+static inline Vector<MockMediaDevice> defaultDevices()
>+{
>+    return Vector<MockMediaDevice> {
>+        MockMediaDevice { "239c24b0-2b15-11e3-8224-0800200c9a66"_s, "Mock audio device 1"_s, MockMicrophoneProperties { 44100 } },
>+        MockMediaDevice { "239c24b1-2b15-11e3-8224-0800200c9a66"_s, "Mock audio device 2"_s, MockMicrophoneProperties { 48000 } },
>+
>+        MockMediaDevice { "239c24b2-2b15-11e3-8224-0800200c9a66"_s, "Mock video device 1"_s,
>+            MockCameraProperties {
>+                30,
>+                RealtimeMediaSourceSettings::VideoFacingMode::User,
>+                { 30.00, 27.50, 25.00, 22.50, 20.00, 17.50, 15.00, 12.50, 10.00, 7.50, 5.00 },
>+                { { 3840, 2160 }, { 1920, 1080 }, { 1280, 720 }, { 960, 540 }, { 640, 480 }, { 352, 288 }, { 320, 240 } },
>+                Color::black,
>+            } },
>+
>+        MockMediaDevice { "239c24b3-2b15-11e3-8224-0800200c9a66"_s, "Mock video device 2"_s,
>+            MockCameraProperties {
>+                15,
>+                RealtimeMediaSourceSettings::VideoFacingMode::Environment,
>+                { 25.00, 22.50, 20.00, 17.50, 15.00, 12.50, 10.00, 7.50, 5.00 },
>+                { { 1280, 720 }, { 960, 540 }, { 640, 480 }, { 352, 288 }, { 320, 240 }, { 160, 120 } },
>+                Color::darkGray,
>+            } },
>+
>+        MockMediaDevice { "SCREEN-1"_s, "Mock screen device 1"_s, MockDisplayProperties { 30, Color::lightGray } },
>+        MockMediaDevice { "SCREEN-2"_s, "Mock screen device 2"_s, MockDisplayProperties { 10, Color::yellow } }
>+    };
>+}
>+
>+static Vector<MockMediaDevice>& devices()
>+{
>+    static auto devices = makeNeverDestroyed([] {
>+        return defaultDevices();
>+    }());
>+    return devices;
>+}
>+
>+static HashMap<String, MockMediaDevice>& deviceMap()
>+{
>+    static auto map = makeNeverDestroyed([] {
>+        HashMap<String, MockMediaDevice> map;
>+        for (auto& device : devices())
>+            map.add(device.persistentId, device);
>+
>+        return map;
>+    }());
>+    return map;
>+}
>+
>+static inline Vector<CaptureDevice>& deviceListForDevice(const MockMediaDevice& device)
>+{
>+    if (device.isMicrophone())
>+        return MockRealtimeMediaSourceCenter::audioDevices();
>+    if (device.isCamera())
>+        return MockRealtimeMediaSourceCenter::videoDevices();
>+
>+    ASSERT(device.isDisplay());
>+    return MockRealtimeMediaSourceCenter::displayDevices();
>+}
>+
> MockRealtimeMediaSourceCenter& MockRealtimeMediaSourceCenter::singleton()
> {
>     static NeverDestroyed<MockRealtimeMediaSourceCenter> center;
>@@ -52,19 +118,129 @@ void MockRealtimeMediaSourceCenter::setMockRealtimeMediaSourceCenterEnabled(bool
>     }
> }
> 
>+static void createCaptureDevice(const MockMediaDevice& device)
>+{
>+    deviceListForDevice(device).append(MockRealtimeMediaSourceCenter::captureDeviceWithPersistentID(device.type(), device.persistentId).value());
>+}
>+
>+void MockRealtimeMediaSourceCenter::resetDevices()
>+{
>+    setDevices(defaultDevices());
>+    RealtimeMediaSourceCenter::singleton().captureDevicesChanged();
>+}
>+
> void MockRealtimeMediaSourceCenter::setDevices(Vector<MockMediaDevice>&& newMockDevices)
> {
>-    MockRealtimeMediaSource::setDevices(WTFMove(newMockDevices));
>+    audioDevices().clear();
>+    videoDevices().clear();
>+    displayDevices().clear();
>+
>+    auto& mockDevices = devices();
>+    mockDevices = WTFMove(newMockDevices);
>+
>+    auto& map = deviceMap();
>+    map.clear();
>+
>+    for (const auto& device : mockDevices) {
>+        map.add(device.persistentId, device);
>+        createCaptureDevice(device);
>+    }
>+    RealtimeMediaSourceCenter::singleton().captureDevicesChanged();
> }
> 
> void MockRealtimeMediaSourceCenter::addDevice(const MockMediaDevice& device)
> {
>-    MockRealtimeMediaSource::addDevice(device);
>+    devices().append(device);
>+    deviceMap().set(device.persistentId, device);
>+    createCaptureDevice(device);
>+    RealtimeMediaSourceCenter::singleton().captureDevicesChanged();
> }
> 
> void MockRealtimeMediaSourceCenter::removeDevice(const String& persistentId)
> {
>-    MockRealtimeMediaSource::removeDevice(persistentId);
>+    auto& map = deviceMap();
>+    auto iterator = map.find(persistentId);
>+    if (iterator == map.end())
>+        return;
>+
>+    devices().removeFirstMatching([&persistentId](const auto& device) {
>+        return device.persistentId == persistentId;
>+    });
>+
>+    deviceListForDevice(iterator->value).removeFirstMatching([&persistentId](const auto& device) {
>+        return device.persistentId() == persistentId;
>+    });
>+
>+    map.remove(iterator);
>+    RealtimeMediaSourceCenter::singleton().captureDevicesChanged();
>+}
>+
>+std::optional<MockMediaDevice> MockRealtimeMediaSourceCenter::mockDeviceWithPersistentID(const String& id)
>+{
>+    ASSERT(!id.isEmpty());
>+
>+    auto& map = deviceMap();
>+    auto iterator = map.find(id);
>+    if (iterator == map.end())
>+        return std::nullopt;
>+
>+    return iterator->value;
>+}
>+
>+std::optional<CaptureDevice> MockRealtimeMediaSourceCenter::captureDeviceWithPersistentID(CaptureDevice::DeviceType type, const String& id)
>+{
>+    ASSERT(!id.isEmpty());
>+
>+    auto& map = deviceMap();
>+    auto iterator = map.find(id);
>+    if (iterator == map.end() || iterator->value.type() != type)
>+        return std::nullopt;
>+
>+    CaptureDevice device { iterator->value.persistentId, type, iterator->value.label };
>+    device.setEnabled(true);
>+    return WTFMove(device);
>+}
>+
>+Vector<CaptureDevice>& MockRealtimeMediaSourceCenter::audioDevices()
>+{
>+    static auto audioDevices = makeNeverDestroyed([] {
>+        Vector<CaptureDevice> audioDevices;
>+        for (const auto& device : devices()) {
>+            if (device.type() == CaptureDevice::DeviceType::Microphone)
>+                audioDevices.append(captureDeviceWithPersistentID(CaptureDevice::DeviceType::Microphone, device.persistentId).value());
>+        }
>+        return audioDevices;
>+    }());
>+
>+    return audioDevices;
>+}
>+
>+Vector<CaptureDevice>& MockRealtimeMediaSourceCenter::videoDevices()
>+{
>+    static auto videoDevices = makeNeverDestroyed([] {
>+        Vector<CaptureDevice> videoDevices;
>+        for (const auto& device : devices()) {
>+            if (device.type() == CaptureDevice::DeviceType::Camera)
>+                videoDevices.append(captureDeviceWithPersistentID(CaptureDevice::DeviceType::Camera, device.persistentId).value());
>+        }
>+        return videoDevices;
>+    }());
>+
>+    return videoDevices;
>+}
>+
>+Vector<CaptureDevice>& MockRealtimeMediaSourceCenter::displayDevices()
>+{
>+    static auto displayDevices = makeNeverDestroyed([] {
>+        Vector<CaptureDevice> displayDevices;
>+        for (const auto& device : devices()) {
>+            if (device.type() == CaptureDevice::DeviceType::Screen)
>+                displayDevices.append(captureDeviceWithPersistentID(CaptureDevice::DeviceType::Screen, device.persistentId).value());
>+        }
>+        return displayDevices;
>+    }());
>+
>+    return displayDevices;
> }
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/platform/mock/MockRealtimeMediaSourceCenter.h b/Source/WebCore/platform/mock/MockRealtimeMediaSourceCenter.h
>index be47a0e3e46211d4effed02c1d716579a1c45752..50b73ff1ad49275c43d3038d0061c28ffe131123 100644
>--- a/Source/WebCore/platform/mock/MockRealtimeMediaSourceCenter.h
>+++ b/Source/WebCore/platform/mock/MockRealtimeMediaSourceCenter.h
>@@ -1,6 +1,6 @@
> /*
>  * Copyright (C) 2013 Google Inc. All rights reserved.
>- * Copyright (C) 2013-2107 Apple Inc.  All rights reserved.
>+ * Copyright (C) 2013-2108 Apple Inc.  All rights reserved.
>  *
>  * Redistribution and use in source and binary forms, with or without
>  * modification, are permitted provided that the following conditions
>@@ -29,6 +29,7 @@
> #if ENABLE(MEDIA_STREAM)
> 
> #include "CaptureDeviceManager.h"
>+#include "MockMediaDevice.h"
> #include "MockRealtimeAudioSource.h"
> #include "MockRealtimeVideoSource.h"
> #include "RealtimeMediaSourceCenter.h"
>@@ -42,10 +43,18 @@ public:
>     WEBCORE_EXPORT static void setDevices(Vector<MockMediaDevice>&&);
>     WEBCORE_EXPORT static void addDevice(const MockMediaDevice&);
>     WEBCORE_EXPORT static void removeDevice(const String& persistentId);
>+    WEBCORE_EXPORT static void resetDevices();
> 
>     static RealtimeMediaSource::VideoCaptureFactory& videoCaptureSourceFactory() { return MockRealtimeVideoSource::factory(); }
>     static RealtimeMediaSource::AudioCaptureFactory& audioCaptureSourceFactory() { return MockRealtimeAudioSource::factory(); }
> 
>+    static Vector<CaptureDevice>& audioDevices();
>+    static Vector<CaptureDevice>& videoDevices();
>+    static Vector<CaptureDevice>& displayDevices();
>+
>+    static std::optional<MockMediaDevice> mockDeviceWithPersistentID(const String&);
>+    static std::optional<CaptureDevice> captureDeviceWithPersistentID(CaptureDevice::DeviceType, const String&);
>+
> private:
>     MockRealtimeMediaSourceCenter() = default;
>     friend NeverDestroyed<MockRealtimeMediaSourceCenter>;
>@@ -59,22 +68,20 @@ private:
>     CaptureDeviceManager& videoCaptureDeviceManager() final { return m_videoCaptureDeviceManager; }
>     CaptureDeviceManager& displayCaptureDeviceManager() final { return m_displayCaptureDeviceManager; }
> 
>-    static std::optional<CaptureDevice> captureDeviceWithPersistentID(CaptureDevice::DeviceType, const String&);
>-
>     class MockAudioCaptureDeviceManager final : public CaptureDeviceManager {
>     private:
>-        const Vector<CaptureDevice>& captureDevices() final { return MockRealtimeMediaSource::audioDevices(); }
>-        std::optional<CaptureDevice> captureDeviceWithPersistentID(CaptureDevice::DeviceType type, const String& id) final { return MockRealtimeMediaSource::captureDeviceWithPersistentID(type, id); }
>+        const Vector<CaptureDevice>& captureDevices() final { return MockRealtimeMediaSourceCenter::audioDevices(); }
>+        std::optional<CaptureDevice> captureDeviceWithPersistentID(CaptureDevice::DeviceType type, const String& id) final { return MockRealtimeMediaSourceCenter::captureDeviceWithPersistentID(type, id); }
>     };
>     class MockVideoCaptureDeviceManager final : public CaptureDeviceManager {
>     private:
>-        const Vector<CaptureDevice>& captureDevices() final { return MockRealtimeMediaSource::videoDevices(); }
>-        std::optional<CaptureDevice> captureDeviceWithPersistentID(CaptureDevice::DeviceType type, const String& id) final { return MockRealtimeMediaSource::captureDeviceWithPersistentID(type, id); }
>+        const Vector<CaptureDevice>& captureDevices() final { return MockRealtimeMediaSourceCenter::videoDevices(); }
>+        std::optional<CaptureDevice> captureDeviceWithPersistentID(CaptureDevice::DeviceType type, const String& id) final { return MockRealtimeMediaSourceCenter::captureDeviceWithPersistentID(type, id); }
>     };
>     class MockDisplayCaptureDeviceManager final : public CaptureDeviceManager {
>     private:
>-        const Vector<CaptureDevice>& captureDevices() final { return MockRealtimeMediaSource::displayDevices(); }
>-        std::optional<CaptureDevice> captureDeviceWithPersistentID(CaptureDevice::DeviceType type, const String& id) final { return MockRealtimeMediaSource::captureDeviceWithPersistentID(type, id); }
>+        const Vector<CaptureDevice>& captureDevices() final { return MockRealtimeMediaSourceCenter::displayDevices(); }
>+        std::optional<CaptureDevice> captureDeviceWithPersistentID(CaptureDevice::DeviceType type, const String& id) final { return MockRealtimeMediaSourceCenter::captureDeviceWithPersistentID(type, id); }
>     };
> 
>     MockAudioCaptureDeviceManager m_audioCaptureDeviceManager;
>diff --git a/Source/WebCore/platform/mock/MockRealtimeVideoSource.cpp b/Source/WebCore/platform/mock/MockRealtimeVideoSource.cpp
>index 9c41e1c4727ee416643227ab0e4a53c9bcc9b200..8271143332d332b6c9141a5c24f87b56af33fd03 100644
>--- a/Source/WebCore/platform/mock/MockRealtimeVideoSource.cpp
>+++ b/Source/WebCore/platform/mock/MockRealtimeVideoSource.cpp
>@@ -1,5 +1,5 @@
> /*
>- * Copyright (C) 2015-2017 Apple Inc. All rights reserved.
>+ * Copyright (C) 2015-2018 Apple Inc. All rights reserved.
>  *
>  * Redistribution and use in source and binary forms, with or without
>  * modification, are permitted provided that the following conditions
>@@ -53,7 +53,7 @@ class MockRealtimeVideoSourceFactory : public RealtimeMediaSource::VideoCaptureF
> public:
>     CaptureSourceOrError createVideoCaptureSource(const CaptureDevice& device, const MediaConstraints* constraints) final
>     {
>-        ASSERT(MockRealtimeMediaSource::captureDeviceWithPersistentID(device.type(), device.persistentId()));
>+        ASSERT(MockRealtimeMediaSourceCenter::captureDeviceWithPersistentID(device.type(), device.persistentId()));
> 
>         switch (device.type()) {
>         case CaptureDevice::DeviceType::Camera:
>@@ -105,62 +105,59 @@ RealtimeMediaSource::VideoCaptureFactory& MockRealtimeVideoSource::factory()
> }
> 
> MockRealtimeVideoSource::MockRealtimeVideoSource(const String& deviceID, const String& name)
>-    : MockRealtimeMediaSource(deviceID, RealtimeMediaSource::Type::Video, name)
>-    , m_timer(RunLoop::current(), this, &MockRealtimeVideoSource::generateFrame)
>+    : RealtimeVideoSource(deviceID, name)
>+    , m_emitFrameTimer(RunLoop::current(), this, &MockRealtimeVideoSource::generateFrame)
> {
>+    auto device = MockRealtimeMediaSourceCenter::mockDeviceWithPersistentID(deviceID);
>+    ASSERT(device);
>+    m_device = *device;
>+
>     m_dashWidths.reserveInitialCapacity(2);
>     m_dashWidths.uncheckedAppend(6);
>     m_dashWidths.uncheckedAppend(6);
> 
>     if (mockScreen()) {
>-        setFrameRate(WTF::get<MockDisplayProperties>(device().properties).defaultFrameRate);
>+        auto& properties = WTF::get<MockDisplayProperties>(m_device.properties);
>+        setFrameRate(properties.defaultFrameRate);
>+        m_fillColor = properties.fillColor;
>         return;
>     }
> 
>-    auto& properties = WTF::get<MockCameraProperties>(device().properties);
>-    setFrameRate(properties.defaultFrameRate);
>-    setFacingMode(properties.facingModeCapability);
>+    auto& properties = WTF::get<MockCameraProperties>(m_device.properties);
>+    setFrameRate(properties.frameRates[0]);
>+    setFacingMode(properties.facingMode);
>+    setSupportedFrameRates(WTFMove(properties.frameRates));
>+    setSupportedCaptureSizes(WTFMove(properties.frameSizes));
>+    m_fillColor = properties.fillColor;
> }
> 
>-MockRealtimeVideoSource::~MockRealtimeVideoSource()
>+const RealtimeMediaSourceCapabilities& MockRealtimeVideoSource::capabilities() const
> {
>-#if PLATFORM(IOS)
>-    MockRealtimeMediaSourceCenter::videoCaptureSourceFactory().unsetActiveSource(*this);
>-#endif
>-}
>-
>-void MockRealtimeVideoSource::startProducingData()
>-{
>-#if PLATFORM(IOS)
>-    MockRealtimeMediaSourceCenter::videoCaptureSourceFactory().setActiveSource(*this);
>-#endif
>+    if (!m_capabilities) {
>+        RealtimeMediaSourceCapabilities capabilities(settings().supportedConstraints());
>+
>+        capabilities.setDeviceId(id());
>+        if (mockCamera()) {
>+            capabilities.addFacingMode(WTF::get<MockCameraProperties>(m_device.properties).facingMode);
>+            addSupportedCapabilities(capabilities);
>+        } else {
>+            capabilities.setWidth(CapabilityValueOrRange(72, 2880));
>+            capabilities.setHeight(CapabilityValueOrRange(45, 1800));
>+            capabilities.setFrameRate(CapabilityValueOrRange(.01, 60.0));
>+        }
> 
>-    if (size().isEmpty()) {
>-        setWidth(640);
>-        setHeight(480);
>+        m_capabilities = WTFMove(capabilities);
>     }
>-
>-    m_startTime = MonotonicTime::now();
>-    m_timer.startRepeating(1_ms * lround(1000 / frameRate()));
>-}
>-
>-void MockRealtimeVideoSource::stopProducingData()
>-{
>-    m_timer.stop();
>-    m_elapsedTime += MonotonicTime::now() - m_startTime;
>-    m_startTime = MonotonicTime::nan();
>+    return m_capabilities.value();
> }
> 
>-Seconds MockRealtimeVideoSource::elapsedTime()
>+const RealtimeMediaSourceSettings& MockRealtimeVideoSource::settings() const
> {
>-    if (std::isnan(m_startTime))
>-        return m_elapsedTime;
>+    if (m_currentSettings)
>+        return m_currentSettings.value();
> 
>-    return m_elapsedTime + (MonotonicTime::now() - m_startTime);
>-}
> 
>-void MockRealtimeVideoSource::updateSettings(RealtimeMediaSourceSettings& settings)
>-{
>+    RealtimeMediaSourceSettings settings;
>     if (mockCamera())
>         settings.setFacingMode(facingMode());
>     else {
>@@ -173,49 +170,74 @@ void MockRealtimeVideoSource::updateSettings(RealtimeMediaSourceSettings& settin
>     settings.setHeight(size.height());
>     if (aspectRatio())
>         settings.setAspectRatio(aspectRatio());
>+    settings.setDeviceId(id());
>+
>+    RealtimeMediaSourceSupportedConstraints supportedConstraints;
>+    supportedConstraints.setSupportsDeviceId(true);
>+    supportedConstraints.setSupportsFrameRate(true);
>+    supportedConstraints.setSupportsWidth(true);
>+    supportedConstraints.setSupportsHeight(true);
>+    supportedConstraints.setSupportsAspectRatio(true);
>+    if (mockCamera())
>+        supportedConstraints.setSupportsFacingMode(true);
>+    settings.setSupportedConstraints(supportedConstraints);
>+
>+    m_currentSettings = WTFMove(settings);
>+
>+    return m_currentSettings.value();
> }
> 
>-void MockRealtimeVideoSource::initializeCapabilities(RealtimeMediaSourceCapabilities& capabilities)
>+void MockRealtimeVideoSource::settingsDidChange()
> {
>-    if (mockCamera()) {
>-        capabilities.addFacingMode(WTF::get<MockCameraProperties>(device().properties).facingModeCapability);
>+    m_currentSettings = std::nullopt;
>+    RealtimeVideoSource::settingsDidChange();
> 
>-        capabilities.setWidth(CapabilityValueOrRange(320, 1920));
>-        capabilities.setHeight(CapabilityValueOrRange(240, 1080));
>-        capabilities.setFrameRate(CapabilityValueOrRange(15.0, 60.0));
>-        capabilities.setAspectRatio(CapabilityValueOrRange(4 / 3.0, 16 / 9.0));
>-    } else {
>-        capabilities.setWidth(CapabilityValueOrRange(72, 2880));
>-        capabilities.setHeight(CapabilityValueOrRange(45, 1800));
>-        capabilities.setFrameRate(CapabilityValueOrRange(.01, 60.0));
>+    if (m_haveProducedData) {
>+        startCaptureTimer();
>+        generateFrame();
>     }
> }
> 
>-void MockRealtimeVideoSource::initializeSupportedConstraints(RealtimeMediaSourceSupportedConstraints& supportedConstraints)
>+void MockRealtimeVideoSource::startCaptureTimer()
> {
>-    supportedConstraints.setSupportsWidth(true);
>-    supportedConstraints.setSupportsHeight(true);
>-    supportedConstraints.setSupportsAspectRatio(true);
>-    supportedConstraints.setSupportsFrameRate(true);
>-    if (mockCamera())
>-        supportedConstraints.setSupportsFacingMode(true);
>+    m_emitFrameTimer.startRepeating(1_ms * lround(1000 / frameRate()));
> }
> 
>-bool MockRealtimeVideoSource::applyFrameRate(double rate)
>+void MockRealtimeVideoSource::startProducingData()
> {
>-    if (m_timer.isActive())
>-        m_timer.startRepeating(1_ms * lround(1000 / rate));
>+    RealtimeVideoSource::startProducingData();
> 
>-    updateSampleBuffer();
>-    return true;
>+    startCaptureTimer();
>+
>+    m_startTime = MonotonicTime::now();
>+    m_haveProducedData = true;
>+}
>+
>+void MockRealtimeVideoSource::stopProducingData()
>+{
>+    m_emitFrameTimer.stop();
>+    m_elapsedTime += MonotonicTime::now() - m_startTime;
>+    m_startTime = MonotonicTime::nan();
>+}
>+
>+Seconds MockRealtimeVideoSource::elapsedTime()
>+{
>+    if (std::isnan(m_startTime))
>+        return m_elapsedTime;
>+
>+    return m_elapsedTime + (MonotonicTime::now() - m_startTime);
> }
> 
> bool MockRealtimeVideoSource::applySize(const IntSize& size)
> {
>+    if (!RealtimeVideoSource::applySize(size))
>+        return false;
>+
>     m_baseFontSize = size.height() * .08;
>     m_bipBopFontSize = m_baseFontSize * 2.5;
>     m_statsFontSize = m_baseFontSize * .5;
>     m_imageBuffer = nullptr;
>+
>     return true;
> }
> 
>@@ -344,12 +366,16 @@ void MockRealtimeVideoSource::drawText(GraphicsContext& context)
>     timeLocation.move(0, m_baseFontSize);
>     context.drawText(timeFont, TextRun((StringView(string))), timeLocation);
> 
>-    FloatPoint statsLocation(size.width() * .65, size.height() * .75);
>-    string = String::format("Frame rate: %ffps", frameRate());
>+    FloatPoint statsLocation(size.width() * .45, size.height() * .75);
>+    string = String::format("Requested frame rate: %.1f fps", frameRate());
>     context.drawText(statsFont, TextRun((StringView(string))), statsLocation);
> 
>-    string = String::format("Size: %u x %u", size.width(), size.height());
>     statsLocation.move(0, m_statsFontSize);
>+    string = String::format("Observed frame rate: %.1f fps", observedFrameRate());
>+    context.drawText(statsFont, TextRun((StringView(string))), statsLocation);
>+
>+    statsLocation.move(0, m_statsFontSize);
>+    string = String::format("Size: %u x %u", size.width(), size.height());
>     context.drawText(statsFont, TextRun((StringView(string))), statsLocation);
> 
>     if (mockCamera()) {
>@@ -415,8 +441,7 @@ void MockRealtimeVideoSource::generateFrame()
>     auto& size = this->size();
>     FloatRect frameRect(FloatPoint(), size);
> 
>-    auto fillColor = mockCamera() ? WTF::get<MockCameraProperties>(device().properties).fillColor : WTF::get<MockDisplayProperties>(device().properties).fillColor;
>-    context.fillRect(FloatRect(FloatPoint(), size), fillColor);
>+    context.fillRect(FloatRect(FloatPoint(), size), m_fillColor);
> 
>     if (!muted()) {
>         drawText(context);
>diff --git a/Source/WebCore/platform/mock/MockRealtimeVideoSource.h b/Source/WebCore/platform/mock/MockRealtimeVideoSource.h
>index a6589b875487704e8b4887a452ee37d97710a60d..25e334691ce52320832fc67ddbb7b63a34ced45e 100644
>--- a/Source/WebCore/platform/mock/MockRealtimeVideoSource.h
>+++ b/Source/WebCore/platform/mock/MockRealtimeVideoSource.h
>@@ -35,7 +35,8 @@
> 
> #include "FontCascade.h"
> #include "ImageBuffer.h"
>-#include "MockRealtimeMediaSource.h"
>+#include "MockMediaDevice.h"
>+#include "RealtimeVideoSource.h"
> #include <wtf/RunLoop.h>
> 
> namespace WebCore {
>@@ -43,28 +44,28 @@ namespace WebCore {
> class FloatRect;
> class GraphicsContext;
> 
>-class MockRealtimeVideoSource : public MockRealtimeMediaSource {
>+class MockRealtimeVideoSource : public RealtimeVideoSource {
> public:
> 
>     static CaptureSourceOrError create(const String& deviceID, const String& name, const MediaConstraints*);
> 
>     static VideoCaptureFactory& factory();
> 
>-    virtual ~MockRealtimeVideoSource();
>-
> protected:
>     MockRealtimeVideoSource(const String& deviceID, const String& name);
>-    virtual void updateSampleBuffer() { }
> 
>+    virtual void updateSampleBuffer() = 0;
>+
>+    void setCurrentFrame(MediaSample&);
>     ImageBuffer* imageBuffer() const;
> 
>     Seconds elapsedTime();
>     bool applySize(const IntSize&) override;
> 
> private:
>-    void updateSettings(RealtimeMediaSourceSettings&) override;
>-    void initializeCapabilities(RealtimeMediaSourceCapabilities&) override;
>-    void initializeSupportedConstraints(RealtimeMediaSourceSupportedConstraints&) override;
>+    const RealtimeMediaSourceCapabilities& capabilities() const final;
>+    const RealtimeMediaSourceSettings& settings() const final;
>+    void settingsDidChange() final;
> 
>     void startProducingData() final;
>     void stopProducingData() final;
>@@ -73,18 +74,18 @@ private:
>     void drawText(GraphicsContext&);
>     void drawBoxes(GraphicsContext&);
> 
>-    bool applyFrameRate(double) override;
>     bool applyFacingMode(RealtimeMediaSourceSettings::VideoFacingMode) override { return true; }
>     bool applyAspectRatio(double) override { return true; }
> 
>     bool isCaptureSource() const final { return true; }
> 
>     void generateFrame();
>+    void startCaptureTimer();
> 
>     void delaySamples(Seconds) override;
> 
>-    bool mockCamera() const { return WTF::holds_alternative<MockCameraProperties>(device().properties); }
>-    bool mockScreen() const { return WTF::holds_alternative<MockDisplayProperties>(device().properties); }
>+    bool mockCamera() const { return WTF::holds_alternative<MockCameraProperties>(m_device.properties); }
>+    bool mockScreen() const { return WTF::holds_alternative<MockDisplayProperties>(m_device.properties); }
> 
>     float m_baseFontSize { 0 };
>     float m_bipBopFontSize { 0 };
>@@ -100,8 +101,14 @@ private:
>     MonotonicTime m_delayUntil;
> 
>     unsigned m_frameNumber { 0 };
>-
>-    RunLoop::Timer<MockRealtimeVideoSource> m_timer;
>+    RunLoop::Timer<MockRealtimeVideoSource> m_emitFrameTimer;
>+    mutable std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
>+    mutable std::optional<RealtimeMediaSourceSettings> m_currentSettings;
>+    RealtimeMediaSourceSupportedConstraints m_supportedConstraints;
>+    Color m_fillColor { Color::black };
>+    MockMediaDevice m_device;
>+
>+    bool m_haveProducedData { false };
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebKit/UIProcess/WebProcessPool.cpp b/Source/WebKit/UIProcess/WebProcessPool.cpp
>index 46b7680e064224fac84c91afaf5b7a237de02ef0..8274855e2498ba4a4c0b2d380b32ffd7bf1b4da4 100644
>--- a/Source/WebKit/UIProcess/WebProcessPool.cpp
>+++ b/Source/WebKit/UIProcess/WebProcessPool.cpp
>@@ -2280,7 +2280,7 @@ void WebProcessPool::removeMockMediaDevice(const String& persistentId)
> void WebProcessPool::resetMockMediaDevices()
> {
> #if ENABLE(MEDIA_STREAM)
>-    MockRealtimeMediaSource::resetDevices();
>+    MockRealtimeMediaSourceCenter::resetDevices();
>     sendToAllProcesses(Messages::WebProcess::ResetMockMediaDevices { });
> #endif
> }
>diff --git a/Source/WebKit/WebProcess/WebProcess.cpp b/Source/WebKit/WebProcess/WebProcess.cpp
>index 0c1aeb6cd7eb0e9789d035bae307b8bb5e5c2fb2..88409422db13cc7679cbaa8cca65138e6d9e0080 100644
>--- a/Source/WebKit/WebProcess/WebProcess.cpp
>+++ b/Source/WebKit/WebProcess/WebProcess.cpp
>@@ -1745,7 +1745,7 @@ void WebProcess::removeMockMediaDevice(const String& persistentId)
> 
> void WebProcess::resetMockMediaDevices()
> {
>-    MockRealtimeMediaSource::resetDevices();
>+    MockRealtimeMediaSourceCenter::resetDevices();
> }
> #endif
> 
>diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
>index 0ecc9a1f0d116abc6698624dd1f075c14ec7876f..ae8e1d715c44c6d4349b19db7cfb47f6bfaf2bb9 100644
>--- a/LayoutTests/ChangeLog
>+++ b/LayoutTests/ChangeLog
>@@ -1,3 +1,25 @@
>+2018-08-29  Eric Carlson  <eric.carlson@apple.com>
>+
>+        Mock video devices should only support discrete sizes
>+        https://bugs.webkit.org/show_bug.cgi?id=189000
>+        <rdar://problem/43766551>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Updated tests and results now that we have better support for width and height constraints.
>+
>+        * fast/mediastream/MediaDevices-getUserMedia.html:
>+        * fast/mediastream/MediaStreamTrack-getCapabilities-expected.txt:
>+        * fast/mediastream/apply-constraints-advanced-expected.txt:
>+        * fast/mediastream/apply-constraints-advanced.html:
>+        * fast/mediastream/apply-constraints-video-expected.txt:
>+        * fast/mediastream/apply-constraints-video.html:
>+        * fast/mediastream/getUserMedia-default-expected.txt:
>+        * fast/mediastream/getUserMedia-default.html:
>+        * imported/w3c/web-platform-tests/mediacapture-streams/MediaStreamTrack-getSettings.https-expected.txt:
>+        * webrtc/video-interruption.html:
>+        * webrtc/video.html:
>+
> 2018-08-29  Truitt Savell  <tsavell@apple.com>
> 
>         Layout Test svg/animations/animate-end-attribute-numeric-precision.html is flaky
>diff --git a/LayoutTests/fast/mediastream/MediaDevices-getUserMedia.html b/LayoutTests/fast/mediastream/MediaDevices-getUserMedia.html
>index 591a7d6e6deca8eb443aad86a588ec6c417c06ee..3c934d5c7b573d0b3562f1514cdaeec408e6fff4 100644
>--- a/LayoutTests/fast/mediastream/MediaDevices-getUserMedia.html
>+++ b/LayoutTests/fast/mediastream/MediaDevices-getUserMedia.html
>@@ -100,9 +100,8 @@
> 
>                 videoConstraints = {
>                     width: {
>-                        min: 400,
>-                        exact: 400,
>-                        max: 400,
>+                        min: 160,
>+                        max: 960,
>                         ideal: 320
>                     },
>                     height: 240,
>diff --git a/LayoutTests/fast/mediastream/MediaStreamTrack-getCapabilities-expected.txt b/LayoutTests/fast/mediastream/MediaStreamTrack-getCapabilities-expected.txt
>index 41da2be124fa4dc4eb06f341f7741ce5d0a41606..431f1f01a5aa31ef4a6cd80f961c05a51e2d3984 100644
>--- a/LayoutTests/fast/mediastream/MediaStreamTrack-getCapabilities-expected.txt
>+++ b/LayoutTests/fast/mediastream/MediaStreamTrack-getCapabilities-expected.txt
>@@ -4,12 +4,12 @@ On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE
> 
> 
> video track capabilities:
>-  capabilities.aspectRatio = { max: 1.778, min: 1.333 }
>+  capabilities.aspectRatio = { max: 1.778, min: 1.222 }
>   capabilities.deviceId = <UUID>
>   capabilities.facingMode = [ user ]
>-  capabilities.frameRate = { max: 60, min: 15 }
>-  capabilities.height = { max: 1080, min: 240 }
>-  capabilities.width = { max: 1920, min: 320 }
>+  capabilities.frameRate = { max: 30, min: 5 }
>+  capabilities.height = { max: 2160, min: 240 }
>+  capabilities.width = { max: 3840, min: 320 }
> 
> audio track capabilities:
>   capabilities.deviceId = <UUID>
>diff --git a/LayoutTests/fast/mediastream/apply-constraints-advanced-expected.txt b/LayoutTests/fast/mediastream/apply-constraints-advanced-expected.txt
>index d509a555c966cb13cf95c5ca24ba84e34c56aba6..75d0bdc6634a323c3284e802b2459bc5d8222e16 100644
>--- a/LayoutTests/fast/mediastream/apply-constraints-advanced-expected.txt
>+++ b/LayoutTests/fast/mediastream/apply-constraints-advanced-expected.txt
>@@ -12,19 +12,19 @@ PASS video.audioTracks.length is 0
> PASS settings['width'] is 640
> PASS settings['height'] is 480
> 
>-** Constraint: {"width":{"min":320},"height":{"min":240},"advanced":[{"width":1920,"height":1280}]} - advanced width and height are too big, minimums are less than current, nothing is changed.
>+** Constraint: {"width":{"min":320},"height":{"min":240},"advanced":[{"width":1920,"height":1280}]} - advanced width and height are not supported, minimums are less than current, nothing is changed.
> PASS settings['width'] is 640
> PASS settings['height'] is 480
> 
>-** Constraint: {"width":{"min":640},"height":{"min":480},"advanced":[{"width":1920,"height":1280},{"width":960,"height":720}]} - first width and height in advanced are too big, second is used.
>-PASS settings['width'] is 960
>-PASS settings['height'] is 720
>+** Constraint: {"width":{"min":640},"height":{"min":480},"advanced":[{"width":6000,"height":6000},{"width":1920,"height":1080}]} - first width and height in advanced are too big, second is used.
>+PASS settings['width'] is 1920
>+PASS settings['height'] is 1080
> 
> ** Constraint: {"width":320,"height":240} - reset width and height.
> PASS settings['width'] is 320
> PASS settings['height'] is 240
> 
>-** Constraint: {"width":{"min":640},"height":{"min":480},"advanced":[{"width":1920,"height":1280}]} - advanced width and height are too big, fall back to required minimums.
>+** Constraint: {"width":{"min":640},"height":{"min":480},"advanced":[{"width":7680,"height":4320}]} - advanced width and height are too big, fall back to required minimums.
> PASS settings['width'] is 640
> PASS settings['height'] is 480
> 
>@@ -32,16 +32,9 @@ PASS settings['height'] is 480
> PASS settings['width'] is 320
> PASS settings['height'] is 240
> 
>-** Constraint: {"width":{"min":640},"height":{"min":480},"advanced":[{"width":1920,"height":1280},{"aspectRatio":1.777777}]} - advanced width and height are too big, aspectRatio is used.
>-PASS settings['width'] is 640
>-PASS settings['height'] is 360
>-
> ** Constraint: {"advanced":[{"facingMode":"left"},{"facingMode":"right"},{"facingMode":"environment"},{"facingMode":"user"}]} - no required constraints, advanced constraints are ignored.
> PASS settings['facingMode'] is "user"
> 
>-** Constraint: {"width":{"min":640},"advanced":[{"facingMode":"left"},{"facingMode":"right"},{"facingMode":"user"}]} - first two advanced facingModes are not supported, third is used.
>-PASS settings['facingMode'] is "user"
>-
> PASS successfullyParsed is true
> 
> TEST COMPLETE
>diff --git a/LayoutTests/fast/mediastream/apply-constraints-advanced.html b/LayoutTests/fast/mediastream/apply-constraints-advanced.html
>index ca65117cbfc997c900fe1677a25887deebee4943..922e1350ccf9a3f9ab2b834c55af81e6cca0db6b 100644
>--- a/LayoutTests/fast/mediastream/apply-constraints-advanced.html
>+++ b/LayoutTests/fast/mediastream/apply-constraints-advanced.html
>@@ -12,7 +12,7 @@
>                     expected: { width: 640, height: 480 }, 
>                 },
>                 {
>-                    message: "advanced width and height are too big, minimums are less than current, nothing is changed.",
>+                    message: "advanced width and height are not supported, minimums are less than current, nothing is changed.",
>                     constraint: {
>                                     width: { min: 320 },
>                                     height: { min: 240 },
>@@ -28,11 +28,11 @@
>                                     width: { min: 640 },
>                                     height: { min: 480 },
>                                     advanced: [
>-                                        { width: 1920, height: 1280 },
>-                                        { width: 960, height: 720 },
>+                                        { width: 6000, height: 6000 },
>+                                        { width: 1920, height: 1080 },
>                                     ]
>                                  },
>-                    expected: { width: 960, height: 720 }, 
>+                    expected: { width: 1920, height: 1080 }, 
>                 },
>                 {
>                     message: "reset width and height.",
>@@ -45,7 +45,7 @@
>                                     width: { min: 640 },
>                                     height: {  min: 480 },
>                                     advanced: [
>-                                        { width: 1920, height: 1280 },
>+                                        { width: 7680, height: 4320 },
>                                     ]
>                                 },
>                     expected: { width: 640, height: 480 }, 
>@@ -55,18 +55,6 @@
>                     constraint: { width: 320, height: 240 }, 
>                     expected: { width: 320, height: 240 }, 
>                 },
>-                {
>-                    message: "advanced width and height are too big, aspectRatio is used.",
>-                    constraint: {
>-                                    width: { min: 640 },
>-                                    height: { min: 480 },
>-                                    advanced: [
>-                                        { width: 1920, height: 1280 },
>-                                        { aspectRatio: 1.777777 }
>-                                    ]
>-                                },
>-                    expected: { width: 640, height: 360 }, 
>-                },
>                 {
>                     message: "no required constraints, advanced constraints are ignored.",
>                     constraint: {
>@@ -79,18 +67,6 @@
>                                 },
>                     expected: { facingMode: "user" }, 
>                 },
>-                {
>-                    message: "first two advanced facingModes are not supported, third is used.",
>-                    constraint: {
>-                                    width: { min: 640 },
>-                                    advanced: [
>-                                        { facingMode: "left" },
>-                                        { facingMode: "right" },
>-                                        { facingMode: "user" },
>-                                    ]
>-                                },
>-                    expected: { facingMode: "user" }, 
>-                },
>             ];
> 
>             let tester = new ConstraintsTest({ video: true }, tests, "Tests applyConstraints on a video stream track.")
>diff --git a/LayoutTests/fast/mediastream/apply-constraints-video-expected.txt b/LayoutTests/fast/mediastream/apply-constraints-video-expected.txt
>index 3aa71af90f74c252d8a4fe1ccab0400f87879ab2..d890d367b6c784840d00c293b4eba5626bf6f3b4 100644
>--- a/LayoutTests/fast/mediastream/apply-constraints-video-expected.txt
>+++ b/LayoutTests/fast/mediastream/apply-constraints-video-expected.txt
>@@ -37,56 +37,40 @@ PASS Promise was rejected
> PASS error.constraint is "frameRate"
> PASS settings['frameRate'] is 30
> 
>-** Constraint: {"width":{"exact":400}} - the 'exact' constraint can be satisfied.
>-PASS settings['width'] is 400
>-PASS settings['height'] is 240
>+** Constraint: {"width":{"exact":960}} - the 'exact' constraint can be satisfied.
>+PASS settings['width'] is 960
>+PASS settings['height'] is 540
> 
>-** Constraint: {"width":{"min":300,"ideal":5000}} - the 'ideal' constraint can't be satisfied but the 'min' can, max should be chosen.
>-PASS settings['width'] is 1920
>-PASS settings['height'] is 240
>+** Constraint: {"width":{"min":300,"ideal":5000}} - the 'ideal' constraint can't be satisfied but the 'min' can, maximum value should be chosen.
>+PASS settings['width'] is 3840
>+PASS settings['height'] is 2160
> 
> ** Constraint: {"width":{"min":320,"ideal":1280},"height":{"min":480,"ideal":720}} - 'ideal' and 'min' constraints can be satisfied, 'ideal' should be chosen.
> PASS settings['width'] is 1280
> PASS settings['height'] is 720
> 
>-** Constraint: {"width":3000} - ideal width is greater than track capability, should be clamped to the maximum value.
>-PASS settings['width'] is 1920
>+** Constraint: {"width":5000} - ideal width is greater than track capability, should be clamped to the maximum value.
>+PASS settings['width'] is 3840
> 
>-** Constraint: {"width":160,"height":120,"frameRate":10} - all values are less than track capabilities, should be clamped to the minimum values.
>+** Constraint: {"width":160,"height":120,"frameRate":4} - all values are less than track capabilities, should be clamped to the minimum values.
> PASS settings['width'] is 320
> PASS settings['height'] is 240
>-PASS settings['frameRate'] is 15
>+PASS settings['frameRate'] is 5
> 
> ** Constraint: {"frameRate":20} - set frame rate, width and height should remain unchanged
> PASS settings['width'] is 320
> PASS settings['height'] is 240
> PASS settings['frameRate'] is 20
> 
>-** Constraint: {"facingMode":"environment","height":400} - illegal facing mode value should be ignored, height should change.
>+** Constraint: {"facingMode":"xnvironment","height":720} - illegal facing mode value should be ignored, height should change.
> PASS settings['facingMode'] is "user"
>-PASS settings['width'] is 320
>-PASS settings['height'] is 400
>+PASS settings['width'] is 1280
>+PASS settings['height'] is 720
> 
> ** Constraint: {"WITDH":400,"frameRate":30} - unknown constraint should be ignored, frame rate should change.
>-PASS settings['width'] is 320
>+PASS settings['width'] is 1280
> PASS settings['frameRate'] is 30
> 
>-** Constraint: {"aspectRatio":"1.3333"} - aspect ratio should change width and height.
>-PASS settings['width'] is 320
>-PASS settings['height'] is 240
>-
>-** Constraint: {"aspectRatio":"1.7778"} - new aspect ratio should again change width and height.
>-PASS settings['width'] is 320
>-PASS settings['height'] is 180
>-
>-** Constraint: {"width":1920} - when aspect ratio has been set, changing width should change height.
>-PASS settings['width'] is 1920
>-PASS settings['height'] is 1080
>-
>-** Constraint: {"height":576} - when aspect ratio has been set, changing height should change width.
>-PASS settings['width'] is 1024
>-PASS settings['height'] is 576
>-
> PASS successfullyParsed is true
> 
> TEST COMPLETE
>diff --git a/LayoutTests/fast/mediastream/apply-constraints-video.html b/LayoutTests/fast/mediastream/apply-constraints-video.html
>index 3d6917a28a1cab52b3579471c519611bae8eba1d..7765c4810598c903e2178f6bcc245cfd1cce0c12 100644
>--- a/LayoutTests/fast/mediastream/apply-constraints-video.html
>+++ b/LayoutTests/fast/mediastream/apply-constraints-video.html
>@@ -36,13 +36,13 @@
>                 },
>                 {
>                     message: "the 'exact' constraint can be satisfied.",
>-                    constraint: { width: { exact: 400 } }, 
>-                    expected: { width: 400, height: 240 },
>+                    constraint: { width: { exact: 960 } },
>+                    expected: { width: 960, height: 540 },
>                 },
>                 {
>-                    message: "the 'ideal' constraint can't be satisfied but the 'min' can, max should be chosen.",
>+                    message: "the 'ideal' constraint can't be satisfied but the 'min' can, maximum value should be chosen.",
>                     constraint: { width: {min: 300, ideal: 5000} }, 
>-                    expected: { width: 1920, height: 240 },
>+                    expected: { width: 3840, height: 2160 },
>                 },
>                 {
>                     message: "'ideal' and 'min' constraints can be satisfied, 'ideal' should be chosen.",
>@@ -51,13 +51,13 @@
>                 },
>                 {
>                     message: "ideal width is greater than track capability, should be clamped to the maximum value.",
>-                    constraint: { width: 3000 }, 
>-                    expected: { width: 1920},
>+                    constraint: { width: 5000 },
>+                    expected: { width: 3840},
>                 },
>                 {
>                     message: "all values are less than track capabilities, should be clamped to the minimum values.",
>-                    constraint: { width: 160, height: 120, frameRate: 10 }, 
>-                    expected: { width: 320, height: 240, frameRate: 15 },
>+                    constraint: { width: 160, height: 120, frameRate: 4 },
>+                    expected: { width: 320, height: 240, frameRate: 5 },
>                 },
>                 {
>                     message: "set frame rate, width and height should remain unchanged",
>@@ -66,33 +66,13 @@
>                 },
>                 {
>                     message: "illegal facing mode value should be ignored, height should change.",
>-                    constraint: { facingMode: "environment", height: 400 }, 
>-                    expected: { facingMode: "user", width: 320, height: 400 },
>+                    constraint: { facingMode: "xnvironment", height: 720 },
>+                    expected: { facingMode: "user", width: 1280, height: 720 },
>                 },
>                 {
>                     message: "unknown constraint should be ignored, frame rate should change.",
>                     constraint: { WITDH: 400, frameRate: 30 }, 
>-                    expected: { width: 320, frameRate: 30 },
>-                },
>-                {
>-                    message: "aspect ratio should change width and height.",
>-                    constraint: { aspectRatio: (4/3).toFixed(4) }, 
>-                    expected: { width: 320, height: 240 },
>-                },
>-                {
>-                    message: "new aspect ratio should again change width and height.",
>-                    constraint: { aspectRatio: (16/9).toFixed(4) }, 
>-                    expected: { width: 320, height: 180 },
>-                },
>-                {
>-                    message: "when aspect ratio has been set, changing width should change height.",
>-                    constraint: { width: 1920 }, 
>-                    expected: { width: 1920, height: 1080},
>-                },
>-                {
>-                    message: "when aspect ratio has been set, changing height should change width.",
>-                    constraint: { height: 576 }, 
>-                    expected: { width: 1024, height: 576},
>+                    expected: { width: 1280, frameRate: 30 },
>                 },
>             ];
> 
>diff --git a/LayoutTests/fast/mediastream/getUserMedia-default-expected.txt b/LayoutTests/fast/mediastream/getUserMedia-default-expected.txt
>index ab4bc8f1129a10a42a20020e85ea0cf0e9b8ed1d..a020da14c673d882804c0feefd3f81a18e682016 100644
>--- a/LayoutTests/fast/mediastream/getUserMedia-default-expected.txt
>+++ b/LayoutTests/fast/mediastream/getUserMedia-default-expected.txt
>@@ -2,6 +2,6 @@
> PASS Checking default video tracks settings 
> PASS Checking only audio capture 
> PASS Checking default video tracks settings except width and height 
>-FAIL Checking default video tracks settings except height assert_equals: frame height expected 240 but got 480
>+PASS Checking default video tracks settings except height 
> PASS Checking default video tracks settings except frameRate 
> 
>diff --git a/LayoutTests/fast/mediastream/getUserMedia-default.html b/LayoutTests/fast/mediastream/getUserMedia-default.html
>index 91883cc10d8aaebcdbec633180ca0125de391ac9..b1440960a92c35a98229d4e1f0518b500e995c4a 100644
>--- a/LayoutTests/fast/mediastream/getUserMedia-default.html
>+++ b/LayoutTests/fast/mediastream/getUserMedia-default.html
>@@ -46,7 +46,7 @@ promise_test((test) => {
> promise_test((test) => {
>     return navigator.mediaDevices.getUserMedia({ audio: true, video: { frameRate: {ideal: 60 } } }).then((stream) => {
>         let settings = stream.getVideoTracks()[0].getSettings();
>-        assert_equals(settings.frameRate, 60, "frame rate");
>+        assert_equals(settings.frameRate, 30, "frame rate");
>         assert_equals(settings.width, settings.height == 640 ? 480 : 640, "frame width");
>         assert_equals(settings.height, settings.width = 640 ? 480 : 640, "frame height");
>     });
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/mediacapture-streams/MediaStreamTrack-getSettings.https-expected.txt b/LayoutTests/imported/w3c/web-platform-tests/mediacapture-streams/MediaStreamTrack-getSettings.https-expected.txt
>index 390863706e98838c8b40c3ac74705457f642d2d4..fa05c3e62bc5c002843f859cc8bf4c04f56e1649 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/mediacapture-streams/MediaStreamTrack-getSettings.https-expected.txt
>+++ b/LayoutTests/imported/w3c/web-platform-tests/mediacapture-streams/MediaStreamTrack-getSettings.https-expected.txt
>@@ -2,5 +2,5 @@ When prompted, accept to share your video stream.
> 
> 
> PASS A device can be opened twice and have the same device ID 
>-FAIL A device can be opened twice with different resolutions assert_equals: expected 640 but got 320
>+PASS A device can be opened twice with different resolutions 
> 
>diff --git a/LayoutTests/webrtc/video-interruption.html b/LayoutTests/webrtc/video-interruption.html
>index d45a22459a1ad4da6823cd5f680a8d4c42257ea1..612f1dcfcdb9cf8aaab74e8de89ff2568b32300e 100644
>--- a/LayoutTests/webrtc/video-interruption.html
>+++ b/LayoutTests/webrtc/video-interruption.html
>@@ -45,7 +45,7 @@ promise_test((test) => {
>         testRunner.setUserMediaPermission(true);
> 
>     var stream;
>-    return navigator.mediaDevices.getUserMedia({video: {advanced: [{width:{min:1280}}, {height:{min:720} } ]}}).then((stream) => {
>+    return navigator.mediaDevices.getUserMedia({video: {advanced: [{width:{min:640}}, {height:{min:480} } ]}}).then((stream) => {
>         return new Promise((resolve, reject) => {
>             createConnections((firstConnection) => {
>                 var track = stream.getVideoTracks()[0];
>diff --git a/LayoutTests/webrtc/video.html b/LayoutTests/webrtc/video.html
>index 387e7b4e65e037a8a898b99db1769d2de380b97c..4a7ca11b7957ba6c444e5ea8a2fedaac3bc317e1 100644
>--- a/LayoutTests/webrtc/video.html
>+++ b/LayoutTests/webrtc/video.html
>@@ -43,7 +43,7 @@ promise_test((test) => {
>     if (window.testRunner)
>         testRunner.setUserMediaPermission(true);
> 
>-    return navigator.mediaDevices.getUserMedia({video: {advanced: [{width:{min:1280}}, {height:{min:720} } ]}}).then((stream) => {
>+    return navigator.mediaDevices.getUserMedia({video: {advanced: [{width:{min:640}}, {height:{min:480} } ]}}).then((stream) => {
>         if (window.internals)
>             assert_true(internals.pageMediaState().includes('HasActiveVideoCaptureDevice'), "Unexpected HasActiveVideoCaptureDevice");
>         return new Promise((resolve, reject) => {
>@@ -66,9 +66,9 @@ promise_test((test) => {
>     }).then((stream) => {
>         video.srcObject = stream;
>         return video.play();
>-    }).then(() => {
>+    }).then(test.step_func(() => {
>         testImage();
>-    });
>+    }));
> }, "Basic video exchange");
>         </script>
>     </body>

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Attachments on bug 189000: 348195 | 348232 | 348260 | 348418 | 348420 | 348462 | 348517