Attachment 349772 Details for Bug 178109 – Patch for landing

[patch] Patch for landing

bug-178109-20180914102807.patch (text/plain), 131.52 KB, created by Eric Carlson on 2018-09-14 10:28:09 PDT

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Creator: Eric Carlson

Created: 2018-09-14 10:28:09 PDT

Size: 131.52 KB

patch

obsolete

>Subversion Revision: 236010
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 99eb5ecebb3a84fe7979b3d9585d86f6b4589bd0..6fa42962979765f676db3ecc10c768960c7fa789 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,148 @@
>+2018-09-12  Eric Carlson  <eric.carlson@apple.com>
>+
>+        Support arbitrary video resolution in getUserMedia API
>+        https://bugs.webkit.org/show_bug.cgi?id=178109
>+        <rdar://problem/35083128>
>+
>+        Reviewed by Youenn Fablet.
>+
>+        Support arbitrary video resolutions by configuring the camera to capture at the closest
>+        larger size it supports and scaling/cropping frames as necessary.
>+
>+        No new tests, existing tests updated.
>+
>+        * Modules/mediastream/CanvasCaptureMediaStreamTrack.h:
>+        * Modules/webaudio/MediaStreamAudioSource.cpp:
>+        (WebCore::MediaStreamAudioSource::capabilities): Make non-const, it wasn't helpful.
>+        (WebCore::MediaStreamAudioSource::settings): Ditto.
>+        (WebCore::MediaStreamAudioSource::capabilities const): Deleted.
>+        (WebCore::MediaStreamAudioSource::settings const): Deleted.
>+        * Modules/webaudio/MediaStreamAudioSource.h:
>+
>+        * SourcesCocoa.txt: Add PixelBufferResizer.
>+
>+        * WebCore.xcodeproj/project.pbxproj: Ditto.
>+
>+        * platform/cocoa/CoreVideoSoftLink.h:
>+        * platform/cocoa/VideoToolboxSoftLink.cpp:
>+        * platform/cocoa/VideoToolboxSoftLink.h:
>+
>+        * platform/graphics/cv/PixelBufferResizer.h: Added.
>+        (WebCore::PixelBufferResizer::canResizeTo):
>+        * platform/graphics/cv/PixelBufferResizer.mm: Added.
>+        (WebCore::PixelBufferResizer::PixelBufferResizer):
>+        (WebCore::PixelBufferResizer::resize):
>+
>+        * platform/mediastream/RealtimeIncomingAudioSource.cpp:
>+        (WebCore::RealtimeIncomingAudioSource::capabilities): Make non-const, it wasn't helpful.
>+        (WebCore::RealtimeIncomingAudioSource::settings): Ditto.
>+        (WebCore::RealtimeIncomingAudioSource::capabilities const): Deleted.
>+        (WebCore::RealtimeIncomingAudioSource::settings const): Deleted.
>+        * platform/mediastream/RealtimeIncomingAudioSource.h:
>+
>+        * platform/mediastream/RealtimeIncomingVideoSource.cpp:
>+        (WebCore::RealtimeIncomingVideoSource::capabilities): Make non-const, it wasn't helpful.
>+        (WebCore::RealtimeIncomingVideoSource::settings): Ditto.
>+        (WebCore::RealtimeIncomingVideoSource::capabilities const): Deleted.
>+        (WebCore::RealtimeIncomingVideoSource::settings const): Deleted.
>+        * platform/mediastream/RealtimeIncomingVideoSource.h:
>+
>+        * platform/mediastream/RealtimeMediaSource.cpp:
>+        (WebCore::RealtimeMediaSource::supportsConstraint):
>+        (WebCore::RealtimeMediaSource::supportsConstraint const): Deleted.
>+        * platform/mediastream/RealtimeMediaSource.h:
>+
>+        * platform/mediastream/RealtimeVideoSource.cpp:
>+        (WebCore::RealtimeVideoSource::presets):
>+        (WebCore::RealtimeVideoSource::setSupportedPresets):
>+        (WebCore::standardVideoSizes):
>+        (WebCore::RealtimeVideoSource::updateCapabilities): Make non-const, it wasn't helpful.
>+        (WebCore::presetSupportsFrameRate):
>+        (WebCore::RealtimeVideoSource::supportsCaptureSize):
>+        (WebCore::RealtimeVideoSource::shouldUsePreset):
>+        (WebCore::RealtimeVideoSource::bestSupportedSizeAndFrameRate):
>+        (WebCore::RealtimeVideoSource::setSizeAndFrameRate):
>+        (WebCore::RealtimeVideoSource::addSupportedCapabilities const): Deleted.
>+        * platform/mediastream/RealtimeVideoSource.h:
>+        (WebCore::VideoPresetData::encode const):
>+        (WebCore::VideoPresetData::decode):
>+        (WebCore::VideoPreset::create):
>+        (WebCore::VideoPreset::VideoPreset):
>+        (WebCore::RealtimeVideoSource::prefersPreset):
>+        (WebCore::RealtimeVideoSource::canResizeVideoFrames const):
>+        (WebCore::RealtimeVideoSource::setDefaultSize):
>+        (WebCore::RealtimeVideoSource::observedFrameRate const):
>+        (WebCore::VideoPreset::encode const): Deleted.
>+        (WebCore::VideoPreset::decode): Deleted.
>+
>+        * platform/mediastream/mac/AVVideoCaptureSource.h:
>+        (WebCore::AVVideoCaptureSource::videoPresets): Deleted.
>+        * platform/mediastream/mac/AVVideoCaptureSource.mm:
>+        (WebCore::AVVideoPreset::create):
>+        (WebCore::AVVideoPreset::AVVideoPreset):
>+        (WebCore::AVVideoCaptureSource::AVVideoCaptureSource):
>+        (WebCore::AVVideoCaptureSource::settings):
>+        (WebCore::AVVideoCaptureSource::capabilities): Make non-const, it wasn't helpful.
>+        (WebCore::AVVideoCaptureSource::setFrameRate):
>+        (WebCore::AVVideoCaptureSource::prefersPreset):
>+        (WebCore::AVVideoCaptureSource::setSizeAndFrameRateWithPreset):
>+        (WebCore::AVVideoCaptureSource::frameDurationForFrameRate):
>+        (WebCore::AVVideoCaptureSource::setupCaptureSession):
>+        (WebCore::AVVideoCaptureSource::processNewFrame):
>+        (WebCore::AVVideoCaptureSource::captureOutputDidOutputSampleBufferFromConnection):
>+        (WebCore::AVVideoCaptureSource::isFrameRateSupported):
>+        (WebCore::AVVideoCaptureSource::generatePresets):
>+        (WebCore::updateSizeMinMax): Deleted.
>+        (WebCore::updateAspectRatioMinMax): Deleted.
>+        (WebCore::AVVideoCaptureSource::settings const): Deleted.
>+        (WebCore::AVVideoCaptureSource::capabilities const): Deleted.
>+        (WebCore::AVVideoCaptureSource::sizeForPreset): Deleted.
>+        (WebCore::AVVideoCaptureSource::setPreset): Deleted.
>+        (WebCore::AVVideoCaptureSource::setSizeAndFrameRate): Deleted.
>+        (WebCore::AVVideoCaptureSource::bestSessionPresetForVideoDimensions): Deleted.
>+        (WebCore::AVVideoCaptureSource::supportsSizeAndFrameRate): Deleted.
>+
>+        * platform/mediastream/mac/CoreAudioCaptureSource.cpp:
>+        (WebCore::CoreAudioCaptureSource::capabilities): Make non-const, it wasn't helpful.
>+        (WebCore::CoreAudioCaptureSource::settings): Ditto.
>+        (WebCore::CoreAudioCaptureSource::capabilities const): Deleted.
>+        (WebCore::CoreAudioCaptureSource::settings const): Deleted.
>+        * platform/mediastream/mac/CoreAudioCaptureSource.h:
>+
>+        * platform/mediastream/mac/DisplayCaptureSourceCocoa.cpp:
>+        (WebCore::DisplayCaptureSourceCocoa::capabilities): Make non-const, it wasn't helpful.
>+        (WebCore::DisplayCaptureSourceCocoa::settings): Ditto.
>+        (WebCore::DisplayCaptureSourceCocoa::capabilities const): Deleted.
>+        (WebCore::DisplayCaptureSourceCocoa::settings const): Deleted.
>+        * platform/mediastream/mac/DisplayCaptureSourceCocoa.h:
>+
>+        * platform/mediastream/mac/MockRealtimeVideoSourceMac.h:
>+        * platform/mediastream/mac/MockRealtimeVideoSourceMac.mm:
>+        (WebCore::MockRealtimeVideoSourceMac::CMSampleBufferFromPixelBuffer):
>+        (WebCore::MockRealtimeVideoSourceMac::updateSampleBuffer):
>+        (WebCore::MockRealtimeVideoSourceMac::setSizeAndFrameRateWithPreset):
>+        * platform/mock/MockMediaDevice.h:
>+        (WebCore::MockCameraProperties::decode):
>+
>+        * platform/mock/MockRealtimeAudioSource.cpp:
>+        (WebCore::MockRealtimeAudioSource::settings): Make non-const, it wasn't helpful.
>+        (WebCore::MockRealtimeAudioSource::capabilities): Ditto.
>+        (WebCore::MockRealtimeAudioSource::settings const): Deleted.
>+        (WebCore::MockRealtimeAudioSource::capabilities const): Deleted.
>+        * platform/mock/MockRealtimeAudioSource.h:
>+
>+        * platform/mock/MockRealtimeMediaSourceCenter.cpp:
>+        (WebCore::defaultDevices): Change video device presets to trigger resize code more often.
>+
>+        * platform/mock/MockRealtimeVideoSource.cpp:
>+        (WebCore::MockRealtimeVideoSource::MockRealtimeVideoSource):
>+        (WebCore::MockRealtimeVideoSource::generatePresets):
>+        (WebCore::MockRealtimeVideoSource::capabilities): Make non-const, it wasn't helpful.
>+        (WebCore::MockRealtimeVideoSource::settings): Ditto.
>+        (WebCore::MockRealtimeVideoSource::capabilities const): Deleted.
>+        (WebCore::MockRealtimeVideoSource::settings const): Deleted.
>+        * platform/mock/MockRealtimeVideoSource.h:
>+
> 2018-09-14  Jer Noble  <jer.noble@apple.com>
> 
>         Turn SourceBufferChangeTypeEnabled on by default
>diff --git a/Source/WebCore/PAL/ChangeLog b/Source/WebCore/PAL/ChangeLog
>index d038276a5058b1e8425bb9a88c6b5b2a0a3d2c5b..67bc21816cdbb1b1d631c043a0bef87dff43ee2a 100644
>--- a/Source/WebCore/PAL/ChangeLog
>+++ b/Source/WebCore/PAL/ChangeLog
>@@ -1,3 +1,14 @@
>+2018-09-12  Eric Carlson  <eric.carlson@apple.com>
>+
>+        Support arbitrary video resolution in getUserMedia API
>+        https://bugs.webkit.org/show_bug.cgi?id=178109
>+        <rdar://problem/35083128>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * pal/cf/CoreMediaSoftLink.cpp:
>+        * pal/cf/CoreMediaSoftLink.h:
>+
> 2018-09-12  Guillaume Emont  <guijemont@igalia.com>
> 
>         Add IGNORE_WARNING_.* macros
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index 666db6954d693ab2dbe80d08208c81299af865b0..97fdc1ebaa612341ba52a50e2b7896008265d3c8 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,13 @@
>+2018-09-12  Eric Carlson  <eric.carlson@apple.com>
>+
>+        Support arbitrary video resolution in getUserMedia API
>+        https://bugs.webkit.org/show_bug.cgi?id=178109
>+        <rdar://problem/35083128>
>+
>+        Reviewed by Youenn Fablet.
>+
>+        * WebProcess/cocoa/UserMediaCaptureManager.cpp:
>+
> 2018-09-14  Jer Noble  <jer.noble@apple.com>
> 
>         Turn SourceBufferChangeTypeEnabled on by default
>diff --git a/Source/WebCore/Modules/mediastream/CanvasCaptureMediaStreamTrack.h b/Source/WebCore/Modules/mediastream/CanvasCaptureMediaStreamTrack.h
>index b006af93bf4d11253ff7c16d2376c0ae1c34c4ae..b2290591d0b34fbea77ff5e5c7352bbfc01a0989 100644
>--- a/Source/WebCore/Modules/mediastream/CanvasCaptureMediaStreamTrack.h
>+++ b/Source/WebCore/Modules/mediastream/CanvasCaptureMediaStreamTrack.h
>@@ -65,8 +65,8 @@ private:
>         // RealtimeMediaSource API
>         void startProducingData() final;
>         void stopProducingData()  final;
>-        const RealtimeMediaSourceCapabilities& capabilities() const final { return RealtimeMediaSourceCapabilities::emptyCapabilities(); }
>-        const RealtimeMediaSourceSettings& settings() const final { return m_settings; }
>+        const RealtimeMediaSourceCapabilities& capabilities() final { return RealtimeMediaSourceCapabilities::emptyCapabilities(); }
>+        const RealtimeMediaSourceSettings& settings() final { return m_settings; }
> 
>         void captureCanvas();
>         void requestFrameTimerFired();
>diff --git a/Source/WebCore/Modules/webaudio/MediaStreamAudioSource.cpp b/Source/WebCore/Modules/webaudio/MediaStreamAudioSource.cpp
>index d797b67c05dfeaf61d94bcabff0a23850af36e37..56f37c1166b6bf9e863c429678709c48bc602624 100644
>--- a/Source/WebCore/Modules/webaudio/MediaStreamAudioSource.cpp
>+++ b/Source/WebCore/Modules/webaudio/MediaStreamAudioSource.cpp
>@@ -39,7 +39,7 @@ MediaStreamAudioSource::MediaStreamAudioSource(float sampleRate)
>     m_currentSettings.setSampleRate(sampleRate);
> }
> 
>-const RealtimeMediaSourceCapabilities& MediaStreamAudioSource::capabilities() const
>+const RealtimeMediaSourceCapabilities& MediaStreamAudioSource::capabilities()
> {
>     // FIXME: implement this.
>     // https://bugs.webkit.org/show_bug.cgi?id=122430
>@@ -47,7 +47,7 @@ const RealtimeMediaSourceCapabilities& MediaStreamAudioSource::capabilities() co
>     return RealtimeMediaSourceCapabilities::emptyCapabilities();
> }
> 
>-const RealtimeMediaSourceSettings& MediaStreamAudioSource::settings() const
>+const RealtimeMediaSourceSettings& MediaStreamAudioSource::settings()
> {
>     // FIXME: implement this.
>     // https://bugs.webkit.org/show_bug.cgi?id=122430
>diff --git a/Source/WebCore/Modules/webaudio/MediaStreamAudioSource.h b/Source/WebCore/Modules/webaudio/MediaStreamAudioSource.h
>index 4b90c8af6e2079970534fb8121b74ca8c1adbaca..fc6ddb8e6d2b87036d262138ded4c6c77796be9e 100644
>--- a/Source/WebCore/Modules/webaudio/MediaStreamAudioSource.h
>+++ b/Source/WebCore/Modules/webaudio/MediaStreamAudioSource.h
>@@ -43,8 +43,8 @@ public:
> 
>     ~MediaStreamAudioSource() = default;
> 
>-    const RealtimeMediaSourceCapabilities& capabilities() const final;
>-    const RealtimeMediaSourceSettings& settings() const final;
>+    const RealtimeMediaSourceCapabilities& capabilities() final;
>+    const RealtimeMediaSourceSettings& settings() final;
> 
>     const String& deviceId() const { return m_deviceId; }
>     void setDeviceId(const String& deviceId) { m_deviceId = deviceId; }
>diff --git a/Source/WebCore/PAL/pal/cf/CoreMediaSoftLink.cpp b/Source/WebCore/PAL/pal/cf/CoreMediaSoftLink.cpp
>index b60a645fb1d763505c33b30113675ba9c8188e20..bda1bf825d941446a8cba7a0cca09f94ad634f24 100644
>--- a/Source/WebCore/PAL/pal/cf/CoreMediaSoftLink.cpp
>+++ b/Source/WebCore/PAL/pal/cf/CoreMediaSoftLink.cpp
>@@ -97,6 +97,7 @@ SOFT_LINK_FUNCTION_FOR_SOURCE(PAL, CoreMedia, CMSampleBufferCreate, OSStatus, (C
> SOFT_LINK_FUNCTION_FOR_SOURCE(PAL, CoreMedia, CMSampleBufferCreateCopy, OSStatus, (CFAllocatorRef allocator, CMSampleBufferRef sbuf, CMSampleBufferRef *sbufCopyOut), (allocator, sbuf, sbufCopyOut))
> SOFT_LINK_FUNCTION_FOR_SOURCE(PAL, CoreMedia, CMSampleBufferCreateCopyWithNewTiming, OSStatus, (CFAllocatorRef allocator, CMSampleBufferRef originalSBuf, CMItemCount numSampleTimingEntries, const CMSampleTimingInfo *sampleTimingArray, CMSampleBufferRef *sBufCopyOut), (allocator, originalSBuf, numSampleTimingEntries, sampleTimingArray, sBufCopyOut))
> SOFT_LINK_FUNCTION_FOR_SOURCE(PAL, CoreMedia, CMSampleBufferCreateReadyWithImageBuffer, OSStatus, (CFAllocatorRef allocator, CVImageBufferRef imageBuffer, CMVideoFormatDescriptionRef formatDescription, const CMSampleTimingInfo* sampleTiming, CMSampleBufferRef* sBufOut), (allocator, imageBuffer, formatDescription, sampleTiming, sBufOut))
>+SOFT_LINK_FUNCTION_FOR_SOURCE(PAL, CoreMedia, CMSampleBufferCreateForImageBuffer, OSStatus, (CFAllocatorRef allocator, CVImageBufferRef imageBuffer, Boolean dataReady, CMSampleBufferMakeDataReadyCallback makeDataReadyCallback, void* makeDataReadyRefcon, CMVideoFormatDescriptionRef formatDescription, const CMSampleTimingInfo* sampleTiming, CMSampleBufferRef* sampleBufferOut), (allocator, imageBuffer, dataReady, makeDataReadyCallback, makeDataReadyRefcon, formatDescription, sampleTiming, sampleBufferOut))
> SOFT_LINK_FUNCTION_FOR_SOURCE(PAL, CoreMedia, CMSampleBufferGetDecodeTimeStamp, CMTime, (CMSampleBufferRef sbuf), (sbuf))
> SOFT_LINK_FUNCTION_FOR_SOURCE(PAL, CoreMedia, CMSampleBufferGetDuration, CMTime, (CMSampleBufferRef sbuf), (sbuf))
> SOFT_LINK_FUNCTION_FOR_SOURCE(PAL, CoreMedia, CMSampleBufferGetImageBuffer, CVImageBufferRef, (CMSampleBufferRef sbuf), (sbuf))
>diff --git a/Source/WebCore/PAL/pal/cf/CoreMediaSoftLink.h b/Source/WebCore/PAL/pal/cf/CoreMediaSoftLink.h
>index e95fbd32b8bf6201da239c96e4fe50b6f0cdab0b..1a67a3ce8c1bf3fbb0b56a447f1dc686a8d47a9e 100644
>--- a/Source/WebCore/PAL/pal/cf/CoreMediaSoftLink.h
>+++ b/Source/WebCore/PAL/pal/cf/CoreMediaSoftLink.h
>@@ -151,6 +151,8 @@ SOFT_LINK_FUNCTION_FOR_HEADER(PAL, CoreMedia, CMSampleBufferCreateCopyWithNewTim
> #define CMSampleBufferCreateCopyWithNewTiming softLink_CoreMedia_CMSampleBufferCreateCopyWithNewTiming
> SOFT_LINK_FUNCTION_FOR_HEADER(PAL, CoreMedia, CMSampleBufferCreateReadyWithImageBuffer, OSStatus, (CFAllocatorRef allocator, CVImageBufferRef imageBuffer, CMVideoFormatDescriptionRef formatDescription, const CMSampleTimingInfo *sampleTiming, CMSampleBufferRef *sBufOut), (allocator, imageBuffer, formatDescription, sampleTiming, sBufOut))
> #define CMSampleBufferCreateReadyWithImageBuffer softLink_CoreMedia_CMSampleBufferCreateReadyWithImageBuffer
>+SOFT_LINK_FUNCTION_FOR_HEADER(PAL, CoreMedia, CMSampleBufferCreateForImageBuffer, OSStatus, (CFAllocatorRef allocator, CVImageBufferRef imageBuffer, Boolean dataReady, CMSampleBufferMakeDataReadyCallback makeDataReadyCallback, void* makeDataReadyRefcon, CMVideoFormatDescriptionRef formatDescription, const CMSampleTimingInfo* sampleTiming, CMSampleBufferRef* sampleBufferOut), (allocator, imageBuffer, dataReady, makeDataReadyCallback, makeDataReadyRefcon, formatDescription, sampleTiming, sampleBufferOut))
>+#define CMSampleBufferCreateForImageBuffer softLink_CoreMedia_CMSampleBufferCreateForImageBuffer
> SOFT_LINK_FUNCTION_FOR_HEADER(PAL, CoreMedia, CMSampleBufferGetDecodeTimeStamp, CMTime, (CMSampleBufferRef sbuf), (sbuf))
> #define CMSampleBufferGetDecodeTimeStamp softLink_CoreMedia_CMSampleBufferGetDecodeTimeStamp
> SOFT_LINK_FUNCTION_FOR_HEADER(PAL, CoreMedia, CMSampleBufferGetDuration, CMTime, (CMSampleBufferRef sbuf), (sbuf))
>diff --git a/Source/WebCore/SourcesCocoa.txt b/Source/WebCore/SourcesCocoa.txt
>index bc6565a152600b09d4ca0d92a81c998e36a84583..8033a36a1e645a4d4bc516ac8fe7a56f1e419f49 100644
>--- a/Source/WebCore/SourcesCocoa.txt
>+++ b/Source/WebCore/SourcesCocoa.txt
>@@ -311,6 +311,7 @@ platform/graphics/cocoa/WebGPULayer.mm
> platform/graphics/cocoa/TextTrackRepresentationCocoa.mm
> 
> platform/graphics/cv/PixelBufferConformerCV.cpp
>+platform/graphics/cv/PixelBufferResizer.mm
> platform/graphics/cv/TextureCacheCV.mm
> platform/graphics/cv/VideoTextureCopierCV.cpp
> 
>diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>index a0216bc5ef1deb829c9e1c4b2948fc8c8bc42aa5..a0398a551a7a2ba1b3506087a976772e0bc4959d 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -120,6 +120,7 @@
> 		074E82BB18A69F0E007EF54C /* PlatformTimeRanges.h in Headers */ = {isa = PBXBuildFile; fileRef = 074E82B918A69F0E007EF54C /* PlatformTimeRanges.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		0753860214489E9800B78452 /* CachedTextTrack.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 0753860014489E9800B78452 /* CachedTextTrack.cpp */; };
> 		0753860314489E9800B78452 /* CachedTextTrack.h in Headers */ = {isa = PBXBuildFile; fileRef = 0753860114489E9800B78452 /* CachedTextTrack.h */; };
>+		0757B13E214AE79900794B0D /* VideoPreset.h in Headers */ = {isa = PBXBuildFile; fileRef = 0757B13C214AE79700794B0D /* VideoPreset.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		075BA84920618AA500FCB4AD /* VideoFullscreenLayerManager.h in Headers */ = {isa = PBXBuildFile; fileRef = 075BA84720618AA500FCB4AD /* VideoFullscreenLayerManager.h */; };
> 		07638A991884487200E15A1B /* MediaSessionManagerIOS.h in Headers */ = {isa = PBXBuildFile; fileRef = 07638A971884487200E15A1B /* MediaSessionManagerIOS.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		07638A9A1884487200E15A1B /* MediaSessionManagerIOS.mm in Sources */ = {isa = PBXBuildFile; fileRef = 07638A981884487200E15A1B /* MediaSessionManagerIOS.mm */; };
>@@ -5333,10 +5334,13 @@
> 		073B87651E43859D0071C0EC /* AudioSampleDataSource.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AudioSampleDataSource.h; sourceTree = "<group>"; };
> 		0744ECEB1E0C4AE5000D0944 /* MockRealtimeAudioSourceMac.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MockRealtimeAudioSourceMac.h; sourceTree = "<group>"; };
> 		0744ECEC1E0C4AE5000D0944 /* MockRealtimeAudioSourceMac.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = MockRealtimeAudioSourceMac.mm; sourceTree = "<group>"; };
>+		0746D30A2146EA37003DDF84 /* PixelBufferResizer.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = PixelBufferResizer.mm; sourceTree = "<group>"; };
>+		0746D30C2146EA38003DDF84 /* PixelBufferResizer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PixelBufferResizer.h; sourceTree = "<group>"; };
> 		074E82B818A69F0E007EF54C /* PlatformTimeRanges.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = PlatformTimeRanges.cpp; sourceTree = "<group>"; };
> 		074E82B918A69F0E007EF54C /* PlatformTimeRanges.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PlatformTimeRanges.h; sourceTree = "<group>"; };
> 		0753860014489E9800B78452 /* CachedTextTrack.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CachedTextTrack.cpp; sourceTree = "<group>"; };
> 		0753860114489E9800B78452 /* CachedTextTrack.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CachedTextTrack.h; sourceTree = "<group>"; };
>+		0757B13C214AE79700794B0D /* VideoPreset.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = VideoPreset.h; sourceTree = "<group>"; };
> 		075BA84720618AA500FCB4AD /* VideoFullscreenLayerManager.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = VideoFullscreenLayerManager.h; sourceTree = "<group>"; };
> 		07638A971884487200E15A1B /* MediaSessionManagerIOS.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MediaSessionManagerIOS.h; sourceTree = "<group>"; };
> 		07638A981884487200E15A1B /* MediaSessionManagerIOS.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = MediaSessionManagerIOS.mm; sourceTree = "<group>"; };
>@@ -15301,6 +15305,7 @@
> 				07221BAD17CF0AD400848E51 /* RTCSessionDescriptionRequest.h */,
> 				313591051E7DDC6000F30630 /* RTCSignalingState.h */,
> 				07221BB017CF0AD400848E51 /* RTCVoidRequest.h */,
>+				0757B13C214AE79700794B0D /* VideoPreset.h */,
> 				070E81D01BF27656001FDA48 /* VideoTrackPrivateMediaStream.h */,
> 				41B2A6251EF1BF60002B9D7A /* WebAudioSourceProvider.h */,
> 			);
>@@ -24781,6 +24786,8 @@
> 			children = (
> 				CD7D33411C7A123F00041293 /* PixelBufferConformerCV.cpp */,
> 				CD7D33421C7A123F00041293 /* PixelBufferConformerCV.h */,
>+				0746D30C2146EA38003DDF84 /* PixelBufferResizer.h */,
>+				0746D30A2146EA37003DDF84 /* PixelBufferResizer.mm */,
> 				CD9D82741C7AE535006FF066 /* TextureCacheCV.h */,
> 				CD9D82731C7AE535006FF066 /* TextureCacheCV.mm */,
> 				CD9D82771C7B8EE1006FF066 /* VideoTextureCopierCV.cpp */,
>@@ -30861,6 +30868,7 @@
> 				52D5A1A71C57489D00DE34A3 /* VideoFullscreenModel.h in Headers */,
> 				52D5A1A81C5748A300DE34A3 /* VideoFullscreenModelVideoElement.h in Headers */,
> 				CDE83DB2183C44060031EAA3 /* VideoPlaybackQuality.h in Headers */,
>+				0757B13E214AE79900794B0D /* VideoPreset.h in Headers */,
> 				CD9D827A1C7B8EE1006FF066 /* VideoTextureCopierCV.h in Headers */,
> 				CDC939A81E9BDFB100BB768D /* VideoToolboxSoftLink.h in Headers */,
> 				BE88E0DF1715D2A200658D98 /* VideoTrack.h in Headers */,
>diff --git a/Source/WebCore/platform/cocoa/CoreVideoSoftLink.h b/Source/WebCore/platform/cocoa/CoreVideoSoftLink.h
>index a213c7c927c5fca1a35e64268492629a3399a45f..a7d870e0d88e5479c48aa110c86e9e0de5ae4da1 100644
>--- a/Source/WebCore/platform/cocoa/CoreVideoSoftLink.h
>+++ b/Source/WebCore/platform/cocoa/CoreVideoSoftLink.h
>@@ -62,6 +62,8 @@ SOFT_LINK_FUNCTION_FOR_HEADER(WebCore, CoreVideo, CVPixelBufferPoolCreatePixelBu
> #define CVPixelBufferPoolCreatePixelBuffer softLink_CoreVideo_CVPixelBufferPoolCreatePixelBuffer
> SOFT_LINK_FUNCTION_FOR_HEADER(WebCore, CoreVideo, CVPixelBufferGetIOSurface, IOSurfaceRef, (CVPixelBufferRef pixelBuffer), (pixelBuffer))
> #define CVPixelBufferGetIOSurface softLink_CoreVideo_CVPixelBufferGetIOSurface
>+SOFT_LINK_FUNCTION_FOR_HEADER(WebCore, CoreVideo, CVPixelBufferPoolGetPixelBufferAttributes, CFDictionaryRef, (CVPixelBufferPoolRef pool), (pool))
>+#define CVPixelBufferPoolGetPixelBufferAttributes softLink_CoreVideo_CVPixelBufferPoolGetPixelBufferAttributes
> 
> SOFT_LINK_CONSTANT_FOR_HEADER(WebCore, CoreVideo, kCVPixelBufferPixelFormatTypeKey, CFStringRef)
> #define kCVPixelBufferPixelFormatTypeKey get_CoreVideo_kCVPixelBufferPixelFormatTypeKey()
>diff --git a/Source/WebCore/platform/cocoa/VideoToolboxSoftLink.cpp b/Source/WebCore/platform/cocoa/VideoToolboxSoftLink.cpp
>index 23c4978ca7afb0f9fa6a5547772ad9fed65f1435..23287aae3f3303c2ac3c5e64a82d9649ddb13810 100644
>--- a/Source/WebCore/platform/cocoa/VideoToolboxSoftLink.cpp
>+++ b/Source/WebCore/platform/cocoa/VideoToolboxSoftLink.cpp
>@@ -29,6 +29,7 @@
> #include <wtf/SoftLinking.h>
> 
> typedef struct OpaqueVTImageRotationSession* VTImageRotationSessionRef;
>+typedef struct OpaqueVTPixelTransferSession* VTPixelTransferSessionRef;
> 
> SOFT_LINK_FRAMEWORK_FOR_SOURCE(WebCore, VideoToolbox)
> 
>@@ -50,3 +51,9 @@ SOFT_LINK_CONSTANT_FOR_SOURCE(WebCore, VideoToolbox, kVTDecompressionPropertyKey
> SOFT_LINK_CONSTANT_FOR_SOURCE(WebCore, VideoToolbox, kVTImageRotationPropertyKey_EnableHighSpeedTransfer, CFStringRef)
> SOFT_LINK_CONSTANT_FOR_SOURCE(WebCore, VideoToolbox, kVTImageRotationPropertyKey_FlipHorizontalOrientation, CFStringRef)
> SOFT_LINK_CONSTANT_FOR_SOURCE(WebCore, VideoToolbox, kVTImageRotationPropertyKey_FlipVerticalOrientation, CFStringRef)
>+
>+SOFT_LINK_FUNCTION_FOR_SOURCE(WebCore, VideoToolbox, VTPixelTransferSessionCreate, OSStatus, (CFAllocatorRef allocator, VTPixelTransferSessionRef* pixelTransferSessionOut), (allocator, pixelTransferSessionOut))
>+SOFT_LINK_FUNCTION_FOR_SOURCE(WebCore, VideoToolbox, VTPixelTransferSessionTransferImage, OSStatus, (VTPixelTransferSessionRef session, CVPixelBufferRef sourceBuffer, CVPixelBufferRef destinationBuffer), (session, sourceBuffer, destinationBuffer))
>+SOFT_LINK_FUNCTION_FOR_SOURCE(WebCore, VideoToolbox, VTSessionSetProperty, OSStatus, (VTSessionRef session, CFStringRef propertyKey, CFTypeRef propertyValue), (session, propertyKey, propertyValue))
>+SOFT_LINK_CONSTANT_FOR_SOURCE(WebCore, VideoToolbox, kVTPixelTransferPropertyKey_ScalingMode, CFStringRef)
>+SOFT_LINK_CONSTANT_FOR_SOURCE(WebCore, VideoToolbox, kVTScalingMode_Trim, CFStringRef)
>diff --git a/Source/WebCore/platform/cocoa/VideoToolboxSoftLink.h b/Source/WebCore/platform/cocoa/VideoToolboxSoftLink.h
>index 8f46a33ee89d7ccce09e7f67a7e22f0312a83829..7215d3aea34e742638db2f8b299ad77c788291de 100644
>--- a/Source/WebCore/platform/cocoa/VideoToolboxSoftLink.h
>+++ b/Source/WebCore/platform/cocoa/VideoToolboxSoftLink.h
>@@ -29,6 +29,7 @@
> #include <wtf/SoftLinking.h>
> 
> typedef struct OpaqueVTImageRotationSession* VTImageRotationSessionRef;
>+typedef struct OpaqueVTPixelTransferSession* VTPixelTransferSessionRef;
> 
> SOFT_LINK_FRAMEWORK_FOR_HEADER(WebCore, VideoToolbox)
> 
>@@ -68,3 +69,15 @@ SOFT_LINK_CONSTANT_FOR_HEADER(WebCore, VideoToolbox, kVTImageRotationPropertyKey
> #define kVTImageRotationPropertyKey_FlipHorizontalOrientation get_VideoToolbox_kVTImageRotationPropertyKey_FlipHorizontalOrientation()
> SOFT_LINK_CONSTANT_FOR_HEADER(WebCore, VideoToolbox, kVTImageRotationPropertyKey_FlipVerticalOrientation, CFStringRef)
> #define kVTImageRotationPropertyKey_FlipVerticalOrientation get_VideoToolbox_kVTImageRotationPropertyKey_FlipVerticalOrientation()
>+
>+SOFT_LINK_FUNCTION_FOR_HEADER(WebCore, VideoToolbox, VTPixelTransferSessionCreate, OSStatus, (CFAllocatorRef allocator, VTPixelTransferSessionRef* pixelTransferSessionOut), (allocator, pixelTransferSessionOut))
>+#define VTPixelTransferSessionCreate softLink_VideoToolbox_VTPixelTransferSessionCreate
>+SOFT_LINK_FUNCTION_FOR_HEADER(WebCore, VideoToolbox, VTPixelTransferSessionTransferImage, OSStatus, (VTPixelTransferSessionRef session, CVPixelBufferRef sourceBuffer, CVPixelBufferRef destinationBuffer), (session, sourceBuffer, destinationBuffer))
>+#define VTPixelTransferSessionTransferImage softLink_VideoToolbox_VTPixelTransferSessionTransferImage
>+SOFT_LINK_FUNCTION_FOR_HEADER(WebCore, VideoToolbox, VTSessionSetProperty, OSStatus, (VTSessionRef session, CFStringRef propertyKey, CFTypeRef propertyValue), (session, propertyKey, propertyValue))
>+#define VTSessionSetProperty softLink_VideoToolbox_VTSessionSetProperty
>+
>+SOFT_LINK_CONSTANT_FOR_HEADER(WebCore, VideoToolbox, kVTPixelTransferPropertyKey_ScalingMode, CFStringRef)
>+#define kVTPixelTransferPropertyKey_ScalingMode get_VideoToolbox_kVTPixelTransferPropertyKey_ScalingMode()
>+SOFT_LINK_CONSTANT_FOR_HEADER(WebCore, VideoToolbox, kVTScalingMode_Trim, CFStringRef)
>+#define kVTScalingMode_Trim get_VideoToolbox_kVTScalingMode_Trim()
>diff --git a/Source/WebCore/platform/graphics/cv/PixelBufferResizer.h b/Source/WebCore/platform/graphics/cv/PixelBufferResizer.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..db19536338441dde26717ff1453c793e8e8c7597
>--- /dev/null
>+++ b/Source/WebCore/platform/graphics/cv/PixelBufferResizer.h
>@@ -0,0 +1,55 @@
>+/*
>+ * Copyright (C) 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
>+ * 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. AND ITS 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 APPLE INC. OR ITS 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 USE(VIDEOTOOLBOX)
>+
>+#include <wtf/RetainPtr.h>
>+
>+typedef struct OpaqueVTPixelTransferSession* VTPixelTransferSessionRef;
>+typedef struct __CVBuffer *CVPixelBufferRef;
>+typedef struct __CVPixelBufferPool *CVPixelBufferPoolRef;
>+typedef struct opaqueCMSampleBuffer *CMSampleBufferRef;
>+
>+namespace WebCore {
>+
>+class PixelBufferResizer {
>+public:
>+    PixelBufferResizer(IntSize, OSType);
>+
>+    RetainPtr<CVPixelBufferRef> resize(CVPixelBufferRef);
>+    RetainPtr<CMSampleBufferRef> resize(CMSampleBufferRef);
>+    bool canResizeTo(IntSize size) { return size == m_size; }
>+
>+private:
>+    RetainPtr<VTPixelTransferSessionRef> m_transferSession;
>+    RetainPtr<CVPixelBufferPoolRef> m_bufferPool;
>+    IntSize m_size;
>+};
>+
>+}
>+
>+#endif // USE(VIDEOTOOLBOX)
>diff --git a/Source/WebCore/platform/graphics/cv/PixelBufferResizer.mm b/Source/WebCore/platform/graphics/cv/PixelBufferResizer.mm
>new file mode 100644
>index 0000000000000000000000000000000000000000..a53ab1af3b24b316ccebf6f424ed3e1a060e39ab
>--- /dev/null
>+++ b/Source/WebCore/platform/graphics/cv/PixelBufferResizer.mm
>@@ -0,0 +1,133 @@
>+/*
>+ * Copyright (C) 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
>+ * 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. AND ITS 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 APPLE INC. OR ITS 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 "PixelBufferResizer.h"
>+
>+#if USE(VIDEOTOOLBOX)
>+
>+#include <wtf/SoftLinking.h>
>+
>+#include "CoreVideoSoftLink.h"
>+#include "VideoToolboxSoftLink.h"
>+
>+namespace WebCore {
>+
>+PixelBufferResizer::PixelBufferResizer(IntSize size, OSType videoFormat)
>+{
>+    VTPixelTransferSessionRef transferSession;
>+    VTPixelTransferSessionCreate(NULL, &transferSession);
>+    ASSERT(transferSession);
>+    m_transferSession = adoptCF(transferSession);
>+
>+    VTSessionSetProperty(transferSession, kVTPixelTransferPropertyKey_ScalingMode, kVTScalingMode_Trim);
>+
>+    CFDictionaryRef sourcePixelBufferOptions = (__bridge CFDictionaryRef) @{
>+        (__bridge NSString *)kCVPixelBufferWidthKey :@(size.width()),
>+        (__bridge NSString *)kCVPixelBufferHeightKey:@(size.height()),
>+        (__bridge NSString *)kCVPixelBufferPixelFormatTypeKey:@(videoFormat),
>+#if PLATFORM(IOS)
>+        (__bridge NSString *)kCVPixelFormatOpenGLESCompatibility : @(YES),
>+#else
>+        (__bridge NSString *)kCVPixelBufferOpenGLCompatibilityKey : @(YES),
>+#endif
>+        (__bridge NSString *)kCVPixelBufferIOSurfacePropertiesKey : @{ /*empty dictionary*/ },
>+    };
>+    CVPixelBufferPoolRef bufferPool;
>+    auto status = CVPixelBufferPoolCreate(kCFAllocatorDefault, NULL, sourcePixelBufferOptions, &bufferPool);
>+    ASSERT(!status);
>+    if (status != kCVReturnSuccess)
>+        return;
>+
>+    m_bufferPool = adoptCF(bufferPool);
>+    m_size = size;
>+}
>+
>+RetainPtr<CVPixelBufferRef> PixelBufferResizer::resize(CVPixelBufferRef inputBuffer)
>+{
>+    RetainPtr<CVPixelBufferRef> result;
>+    CVPixelBufferRef outputBuffer = nullptr;
>+
>+    auto status = CVPixelBufferPoolCreatePixelBuffer(kCFAllocatorDefault, m_bufferPool.get(), &outputBuffer);
>+    if (status) {
>+        RELEASE_LOG(Media, "PixelBufferResizer::resize, CVPixelBufferPoolCreatePixelBuffer failed with error %d", static_cast<int>(status));
>+        return nullptr;
>+    }
>+    result = adoptCF(outputBuffer);
>+
>+    auto err = VTPixelTransferSessionTransferImage(m_transferSession.get(), inputBuffer, outputBuffer);
>+    if (err) {
>+        RELEASE_LOG(Media, "PixelBufferResizer::resize, VTPixelTransferSessionTransferImage failed with error %d", static_cast<int>(err));
>+        return nullptr;
>+    }
>+
>+    return result;
>+}
>+
>+RetainPtr<CMSampleBufferRef> PixelBufferResizer::resize(CMSampleBufferRef sampleBuffer)
>+{
>+    auto convertedPixelBuffer = resize(CMSampleBufferGetImageBuffer(sampleBuffer));
>+    if (!convertedPixelBuffer)
>+        return nullptr;
>+
>+    CMVideoFormatDescriptionRef formatDescription = nullptr;
>+    auto status = CMVideoFormatDescriptionCreateForImageBuffer(kCFAllocatorDefault, convertedPixelBuffer.get(), &formatDescription);
>+    if (status != noErr) {
>+        RELEASE_LOG(Media, "PixelBufferResizer::resize: failed to create CMVideoFormatDescription with error code: %d", static_cast<int>(status));
>+        return nullptr;
>+    }
>+
>+    CMItemCount itemCount = 0;
>+    status = CMSampleBufferGetSampleTimingInfoArray(sampleBuffer, 1, nullptr, &itemCount);
>+    if (status != noErr) {
>+        RELEASE_LOG(Media, "PixelBufferResizer::resize: CMSampleBufferGetSampleTimingInfoArray failed with error code: %d", static_cast<int>(status));
>+        return nullptr;
>+    }
>+    Vector<CMSampleTimingInfo> timingInfoArray;
>+    CMSampleTimingInfo* timeingInfoPtr = nullptr;
>+    if (itemCount) {
>+        timingInfoArray.grow(itemCount);
>+        status = CMSampleBufferGetSampleTimingInfoArray(sampleBuffer, itemCount, timingInfoArray.data(), nullptr);
>+        if (status != noErr) {
>+            RELEASE_LOG(Media, "PixelBufferResizer::resize: CMSampleBufferGetSampleTimingInfoArray failed with error code: %d", static_cast<int>(status));
>+            return nullptr;
>+        }
>+        timeingInfoPtr = timingInfoArray.data();
>+    }
>+
>+    CMSampleBufferRef resizedSampleBuffer;
>+    status = CMSampleBufferCreateReadyWithImageBuffer(kCFAllocatorDefault, convertedPixelBuffer.get(), formatDescription, timeingInfoPtr, &resizedSampleBuffer);
>+    CFRelease(formatDescription);
>+    if (status != noErr) {
>+        RELEASE_LOG(Media, "PixelBufferResizer::resize: failed to create CMSampleBuffer with error code: %d", static_cast<int>(status));
>+        return nullptr;
>+    }
>+
>+    return adoptCF(resizedSampleBuffer);
>+}
>+
>+} // namespace WebCore
>+
>+#endif // USE(VIDEOTOOLBOX)
>diff --git a/Source/WebCore/platform/mediastream/RealtimeIncomingAudioSource.cpp b/Source/WebCore/platform/mediastream/RealtimeIncomingAudioSource.cpp
>index 52331381fe5bbce3dc3cb47cef201eb03219d234..b3762947d68b6814f9f42fc4a9cc72b8146dce71 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeIncomingAudioSource.cpp
>+++ b/Source/WebCore/platform/mediastream/RealtimeIncomingAudioSource.cpp
>@@ -73,12 +73,12 @@ void RealtimeIncomingAudioSource::setSourceTrack(rtc::scoped_refptr<webrtc::Audi
>         m_audioTrack->AddSink(this);
> }
> 
>-const RealtimeMediaSourceCapabilities& RealtimeIncomingAudioSource::capabilities() const
>+const RealtimeMediaSourceCapabilities& RealtimeIncomingAudioSource::capabilities()
> {
>     return RealtimeMediaSourceCapabilities::emptyCapabilities();
> }
> 
>-const RealtimeMediaSourceSettings& RealtimeIncomingAudioSource::settings() const
>+const RealtimeMediaSourceSettings& RealtimeIncomingAudioSource::settings()
> {
>     return m_currentSettings;
> }
>diff --git a/Source/WebCore/platform/mediastream/RealtimeIncomingAudioSource.h b/Source/WebCore/platform/mediastream/RealtimeIncomingAudioSource.h
>index 044bfa85f0cac460c75cb33ce7f6b47c4e524f33..9add53a8c10ca2852f95fdb736817fab97af2584 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeIncomingAudioSource.h
>+++ b/Source/WebCore/platform/mediastream/RealtimeIncomingAudioSource.h
>@@ -63,8 +63,8 @@ private:
>     void startProducingData() final;
>     void stopProducingData()  final;
> 
>-    const RealtimeMediaSourceCapabilities& capabilities() const final;
>-    const RealtimeMediaSourceSettings& settings() const final;
>+    const RealtimeMediaSourceCapabilities& capabilities() final;
>+    const RealtimeMediaSourceSettings& settings() final;
> 
>     RealtimeMediaSourceSettings m_currentSettings;
>     rtc::scoped_refptr<webrtc::AudioTrackInterface> m_audioTrack;
>diff --git a/Source/WebCore/platform/mediastream/RealtimeIncomingVideoSource.cpp b/Source/WebCore/platform/mediastream/RealtimeIncomingVideoSource.cpp
>index f760d40f75f60aadc8af21d2d0f57d67cc0c5508..bda76d3191abbd3a40aef0e35c7e4819933b1f6f 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeIncomingVideoSource.cpp
>+++ b/Source/WebCore/platform/mediastream/RealtimeIncomingVideoSource.cpp
>@@ -70,12 +70,12 @@ void RealtimeIncomingVideoSource::stopProducingData()
>         m_videoTrack->RemoveSink(this);
> }
> 
>-const RealtimeMediaSourceCapabilities& RealtimeIncomingVideoSource::capabilities() const
>+const RealtimeMediaSourceCapabilities& RealtimeIncomingVideoSource::capabilities()
> {
>     return RealtimeMediaSourceCapabilities::emptyCapabilities();
> }
> 
>-const RealtimeMediaSourceSettings& RealtimeIncomingVideoSource::settings() const
>+const RealtimeMediaSourceSettings& RealtimeIncomingVideoSource::settings()
> {
>     return m_currentSettings;
> }
>diff --git a/Source/WebCore/platform/mediastream/RealtimeIncomingVideoSource.h b/Source/WebCore/platform/mediastream/RealtimeIncomingVideoSource.h
>index 06680ab3d7f0c9c5a0f7af071f160c892f7d10d9..4bbc07d92bef8a7b147806938750552f6a9b0e27 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeIncomingVideoSource.h
>+++ b/Source/WebCore/platform/mediastream/RealtimeIncomingVideoSource.h
>@@ -67,8 +67,8 @@ private:
>     void startProducingData() final;
>     void stopProducingData()  final;
> 
>-    const RealtimeMediaSourceCapabilities& capabilities() const final;
>-    const RealtimeMediaSourceSettings& settings() const final;
>+    const RealtimeMediaSourceCapabilities& capabilities() final;
>+    const RealtimeMediaSourceSettings& settings() final;
> 
>     rtc::scoped_refptr<webrtc::VideoTrackInterface> m_videoTrack;
> };
>diff --git a/Source/WebCore/platform/mediastream/RealtimeMediaSource.cpp b/Source/WebCore/platform/mediastream/RealtimeMediaSource.cpp
>index f2793f38c05a9a31c708e1d422303e85d06a5fde..b3ab3e0dae812fcdfb232d60878a32b5e04329a9 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeMediaSource.cpp
>+++ b/Source/WebCore/platform/mediastream/RealtimeMediaSource.cpp
>@@ -693,7 +693,7 @@ bool RealtimeMediaSource::selectSettings(const MediaConstraints& constraints, Fl
>     return true;
> }
> 
>-bool RealtimeMediaSource::supportsConstraint(const MediaConstraint& constraint) const
>+bool RealtimeMediaSource::supportsConstraint(const MediaConstraint& constraint)
> {
>     auto& capabilities = this->capabilities();
> 
>diff --git a/Source/WebCore/platform/mediastream/RealtimeMediaSource.h b/Source/WebCore/platform/mediastream/RealtimeMediaSource.h
>index 057240ffc4404d0675fbf53eba6d4b97ba9fcf9a..6d8b96298db3e5e088895f133ce88d016a390138 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeMediaSource.h
>+++ b/Source/WebCore/platform/mediastream/RealtimeMediaSource.h
>@@ -191,8 +191,8 @@ public:
>     bool echoCancellation() const { return m_echoCancellation; }
>     void setEchoCancellation(bool);
> 
>-    virtual const RealtimeMediaSourceCapabilities& capabilities() const = 0;
>-    virtual const RealtimeMediaSourceSettings& settings() const = 0;
>+    virtual const RealtimeMediaSourceCapabilities& capabilities() = 0;
>+    virtual const RealtimeMediaSourceSettings& settings() = 0;
> 
>     using SuccessHandler = WTF::Function<void()>;
>     using FailureHandler = WTF::Function<void(const String& badConstraint, const String& errorString)>;
>@@ -200,7 +200,7 @@ public:
>     std::optional<std::pair<String, String>> applyConstraints(const MediaConstraints&);
> 
>     bool supportsConstraints(const MediaConstraints&, String&);
>-    bool supportsConstraint(const MediaConstraint&) const;
>+    bool supportsConstraint(const MediaConstraint&);
> 
>     virtual void settingsDidChange(OptionSet<RealtimeMediaSourceSettings::Flag>);
> 
>diff --git a/Source/WebCore/platform/mediastream/RealtimeVideoSource.cpp b/Source/WebCore/platform/mediastream/RealtimeVideoSource.cpp
>index b3ad6cb9e4a9a80194933b15c7f4b45f222f8ae8..f5db9b097e76439ab1198e7ee62be05a22d3d7ab 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeVideoSource.cpp
>+++ b/Source/WebCore/platform/mediastream/RealtimeVideoSource.cpp
>@@ -58,22 +58,85 @@ void RealtimeVideoSource::prepareToProduceData()
>         setSize(m_defaultSize);
> }
> 
>-void RealtimeVideoSource::setSupportedPresets(RealtimeVideoSource::VideoPresets&& presets)
>+const Vector<Ref<VideoPreset>>& RealtimeVideoSource::presets()
> {
>-    m_presets = WTFMove(presets);
>-    std::sort(m_presets.begin(), m_presets.end(),
>-        [&] (const auto& a, const auto& b) -> bool {
>-            return (a.size.width() * a.size.height()) < (b.size.width() * b.size.height());
>+    if (m_presets.isEmpty())
>+        generatePresets();
>+
>+    ASSERT(!m_presets.isEmpty());
>+    return m_presets;
>+}
>+
>+void RealtimeVideoSource::setSupportedPresets(Vector<VideoPresetData>&& presetData)
>+{
>+    Vector<Ref<VideoPreset>> presets;
>+
>+    for (auto& data : presetData)
>+        presets.append(VideoPreset::create(WTFMove(data)));
>+
>+    setSupportedPresets(WTFMove(presets));
>+}
>+
>+void RealtimeVideoSource::setSupportedPresets(const Vector<Ref<VideoPreset>>& presets)
>+{
>+    m_presets = WTF::map(presets, [](auto& preset) {
>+        return preset.copyRef();
>     });
>-    
>+
>     for (auto& preset : m_presets) {
>-        std::sort(preset.frameRateRanges.begin(), preset.frameRateRanges.end(),
>+        std::sort(preset->frameRateRanges.begin(), preset->frameRateRanges.end(),
>             [&] (const auto& a, const auto& b) -> bool {
>                 return a.minimum < b.minimum;
>         });
>     }
> }
> 
>+static const Vector<IntSize>& standardVideoSizes()
>+{
>+    static const auto sizes = makeNeverDestroyed([] {
>+        static IntSize videoSizes[] = {
>+            { 112, 112 },
>+            { 160, 160 },
>+            { 160, 120 }, // 4:3, QQVGA
>+            { 192, 192 },
>+            { 192, 112 }, // 16:9
>+            { 192, 144 }, // 3:4
>+            { 240, 240 },
>+            { 240, 160 }, // 3:2, HQVGA
>+            { 320, 320 },
>+            { 320, 176 }, // 16:9
>+            { 320, 240 }, // 4:3, QVGA
>+            { 352, 288 }, // CIF
>+            { 480, 272 }, // 16:9
>+            { 480, 360 }, // 4:3
>+            { 480, 480 },
>+            { 640, 640 },
>+            { 640, 368 }, // 16:9
>+            { 640, 480 }, // 4:3
>+            { 720, 720 },
>+            { 800, 600 }, // 4:3, SVGA
>+            { 960, 540 }, // 16:9, qHD
>+            { 1024, 600 }, // 16:9, WSVGA
>+            { 1024, 768 }, // 4:3, XGA
>+            { 1280, 960 }, // 4:3
>+            { 1280, 1024 }, // 5:4, SXGA
>+            { 1280, 720 }, // 16:9, WXGA
>+            { 1366, 768 }, // 16:9, HD
>+            { 1920, 1080 }, // 16:9, FHD
>+            { 2560, 1440 }, // 16:9, QHD
>+            { 2592, 1936 },
>+            { 3264, 2448 }, // 3:4
>+            { 3840, 2160 }, // 16:9, 4K UHD
>+        };
>+        Vector<IntSize> sizes;
>+        for (auto& size : videoSizes)
>+            sizes.append(size);
>+
>+        return sizes;
>+    }());
>+
>+    return sizes.get();
>+}
> template <typename ValueType>
> static void updateMinMax(ValueType& min, ValueType& max, ValueType value)
> {
>@@ -81,9 +144,9 @@ static void updateMinMax(ValueType& min, ValueType& max, ValueType value)
>     max = std::max<ValueType>(max, value);
> }
> 
>-void RealtimeVideoSource::addSupportedCapabilities(RealtimeMediaSourceCapabilities& capabilities) const
>+void RealtimeVideoSource::updateCapabilities(RealtimeMediaSourceCapabilities& capabilities)
> {
>-    ASSERT(!m_presets.isEmpty());
>+    ASSERT(!presets().isEmpty());
> 
>     int minimumWidth = std::numeric_limits<int>::max();
>     int maximumWidth = 0;
>@@ -93,18 +156,28 @@ void RealtimeVideoSource::addSupportedCapabilities(RealtimeMediaSourceCapabiliti
>     double maximumAspectRatio = 0;
>     double minimumFrameRate = std::numeric_limits<double>::max();
>     double maximumFrameRate = 0;
>-    for (const auto& preset : m_presets) {
>-        const auto& size = preset.size;
>+    for (const auto& preset : presets()) {
>+        const auto& size = preset->size;
>         updateMinMax(minimumWidth, maximumWidth, size.width());
>         updateMinMax(minimumHeight, maximumHeight, size.height());
>-
>         updateMinMax(minimumAspectRatio, maximumAspectRatio, static_cast<double>(size.width()) / size.height());
> 
>-        for (const auto& rate : preset.frameRateRanges) {
>+        for (const auto& rate : preset->frameRateRanges) {
>             updateMinMax(minimumFrameRate, maximumFrameRate, rate.minimum);
>             updateMinMax(minimumFrameRate, maximumFrameRate, rate.maximum);
>         }
>     }
>+
>+    if (canResizeVideoFrames()) {
>+        for (auto& size : standardVideoSizes()) {
>+            if (size.width() < minimumWidth || size.height() < minimumHeight) {
>+                minimumWidth = std::min(minimumWidth, size.width());
>+                minimumHeight = std::min(minimumHeight, size.height());
>+                minimumAspectRatio = std::min(minimumAspectRatio, static_cast<double>(size.width()) / size.height());
>+            }
>+        }
>+    }
>+
>     capabilities.setWidth({ minimumWidth, maximumWidth });
>     capabilities.setHeight({ minimumHeight, maximumHeight });
>     capabilities.setAspectRatio({ minimumAspectRatio, maximumAspectRatio });
>@@ -119,55 +192,174 @@ bool RealtimeVideoSource::supportsSizeAndFrameRate(std::optional<int> width, std
>     return !!bestSupportedSizeAndFrameRate(width, height, frameRate);
> }
> 
>-std::optional<RealtimeVideoSource::CaptureSizeAndFrameRate> RealtimeVideoSource::bestSupportedSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double> frameRate)
>+bool RealtimeVideoSource::frameRateRangeIncludesRate(const FrameRateRange& range, double frameRate)
> {
>-    if (!width && !height && !frameRate)
>+    const double epsilon = 0.001;
>+    return frameRate + epsilon >= range.minimum && frameRate - epsilon <= range.maximum;
>+}
>+
>+bool RealtimeVideoSource::presetSupportsFrameRate(RefPtr<VideoPreset> preset, double frameRate)
>+{
>+    for (const auto& range : preset->frameRateRanges) {
>+        if (frameRateRangeIncludesRate(range, frameRate))
>+            return true;
>+    }
>+
>+    return false;
>+}
>+
>+bool RealtimeVideoSource::supportsCaptureSize(std::optional<int> width, std::optional<int> height, const Function<bool(const IntSize&)>&& function)
>+{
>+    if (width && height)
>+        return function({ width.value(), height.value() });
>+
>+    if (width) {
>+        for (auto& size : standardVideoSizes()) {
>+            if (width.value() == size.width() && function({ size.width(), size.height() }))
>+                return true;
>+        }
>+
>+        return false;
>+    }
>+
>+    for (auto& size : standardVideoSizes()) {
>+        if (height.value() == size.height() && function({ size.width(), size.height() }))
>+            return true;
>+    }
>+
>+    return false;
>+}
>+
>+bool RealtimeVideoSource::shouldUsePreset(VideoPreset& current, VideoPreset& candidate)
>+{
>+    return candidate.size.width() <= current.size.width() && candidate.size.height() <= current.size.height() && prefersPreset(candidate);
>+}
>+
>+std::optional<RealtimeVideoSource::CaptureSizeAndFrameRate> RealtimeVideoSource::bestSupportedSizeAndFrameRate(std::optional<int> requestedWidth, std::optional<int> requestedHeight, std::optional<double> requestedFrameRate)
>+{
>+    if (!requestedWidth && !requestedHeight && !requestedFrameRate)
>         return { };
> 
>-    CaptureSizeAndFrameRate match;
>-    for (const auto& preset : m_presets) {
>-        const auto& size = preset.size;
>-        if ((width && width.value() != size.width()) || (height && height.value() != size.height()))
>+    if (!requestedWidth && !requestedHeight && !size().isEmpty()) {
>+        requestedWidth = size().width();
>+        requestedHeight = size().height();
>+    }
>+    if (!requestedFrameRate)
>+        requestedFrameRate = frameRate();
>+
>+    CaptureSizeAndFrameRate result;
>+    RefPtr<VideoPreset> exactSizePreset;
>+    RefPtr<VideoPreset> aspectRatioPreset;
>+    IntSize aspectRatioMatchSize;
>+    RefPtr<VideoPreset> resizePreset;
>+    IntSize resizeSize;
>+
>+    for (const auto& preset : presets()) {
>+        const auto& presetSize = preset->size;
>+
>+        if (!presetSupportsFrameRate(&preset.get(), requestedFrameRate.value()))
>+            continue;
>+
>+        if (!requestedWidth && !requestedHeight) {
>+            result.requestedFrameRate = requestedFrameRate.value();
>+            return result;
>+        }
>+
>+        // Don't look at presets smaller than the requested resolution because we never want to resize larger.
>+        if ((requestedWidth && presetSize.width() < requestedWidth.value()) || (requestedHeight && presetSize.height() < requestedHeight.value()))
>+            continue;
>+
>+        auto lookForExactSizeMatch = [&] (const IntSize& size) -> bool {
>+            return preset->size == size;
>+        };
>+        if (supportsCaptureSize(requestedWidth, requestedHeight, WTFMove(lookForExactSizeMatch))) {
>+            if (!exactSizePreset || prefersPreset(preset))
>+                exactSizePreset = &preset.get();
>             continue;
>+        }
> 
>-        match.size = size;
>-        if (!frameRate) {
>-            match.frameRate = preset.frameRateRanges[preset.frameRateRanges.size() - 1].maximum;
>-            return match;
>+        IntSize encodingSize;
>+        auto lookForAspectRatioMatch = [this, &preset, &encodingSize] (const IntSize& size) -> bool {
>+            auto aspectRatio = [] (const IntSize size) -> double {
>+                return size.width() / static_cast<double>(size.height());
>+            };
>+            if (std::abs(aspectRatio(preset->size) - aspectRatio(size)) > 10e-7 || !canResizeVideoFrames())
>+                return false;
>+
>+            encodingSize = size;
>+            return true;
>+        };
>+        if (supportsCaptureSize(requestedWidth, requestedHeight, WTFMove(lookForAspectRatioMatch))) {
>+            if (!aspectRatioPreset || shouldUsePreset(*aspectRatioPreset, preset)) {
>+                aspectRatioPreset = &preset.get();
>+                aspectRatioMatchSize = encodingSize;
>+            }
>         }
> 
>-        const double epsilon = 0.001;
>-        for (const auto& rate : preset.frameRateRanges) {
>-            if (frameRate.value() + epsilon >= rate.minimum && frameRate.value() - epsilon <= rate.maximum) {
>-                match.frameRate = frameRate.value();
>-                return match;
>+        if (requestedWidth && requestedHeight) {
>+            const auto& minStandardSize = standardVideoSizes()[0];
>+            if (requestedWidth.value() >= minStandardSize.width() && requestedHeight.value() >= minStandardSize.height()) {
>+                if (!resizePreset || shouldUsePreset(*resizePreset, preset)) {
>+                    resizePreset = &preset.get();
>+                    resizeSize = { requestedWidth.value(), requestedHeight.value() };
>+                }
>+            }
>+        } else {
>+            for (auto& standardSize : standardVideoSizes()) {
>+                if (standardSize.width() > preset->size.width() || standardSize.height() > preset->size.height())
>+                    break;
>+                if ((requestedWidth && requestedWidth.value() != standardSize.width()) || (requestedHeight && requestedHeight.value() != standardSize.height()))
>+                    continue;
>+
>+                if (!resizePreset || shouldUsePreset(*resizePreset, preset)) {
>+                    resizePreset = &preset.get();
>+                    resizeSize = standardSize;
>+                }
>             }
>         }
>+    }
> 
>-        break;
>+    if (!exactSizePreset && !aspectRatioPreset && !resizePreset)
>+        return { };
>+
>+    result.requestedFrameRate = requestedFrameRate.value();
>+    if (exactSizePreset) {
>+        result.encodingPreset = exactSizePreset;
>+        result.requestedSize = exactSizePreset->size;
>+        return result;
>+    }
>+
>+    if (aspectRatioPreset) {
>+        result.encodingPreset = aspectRatioPreset;
>+        result.requestedSize = aspectRatioMatchSize;
>+        return result;
>     }
> 
>-    return { };
>+    result.encodingPreset = resizePreset;
>+    result.requestedSize = resizeSize;
>+    return result;
> }
> 
> void RealtimeVideoSource::setSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double> frameRate)
> {
>     std::optional<RealtimeVideoSource::CaptureSizeAndFrameRate> match;
> 
>-    // If only the framerate is changing, first see if it is supported with the current width and height.
>     auto size = this->size();
>-    if (!width && !height && !size.isEmpty())
>-        match = bestSupportedSizeAndFrameRate(size.width(), size.height(), frameRate);
>-
>-    if (!match)
>-        match = bestSupportedSizeAndFrameRate(width, height, frameRate);
>+    if (!width && !height && !size.isEmpty()) {
>+        width = size.width();
>+        height = size.height();
>+    }
> 
>+    match = bestSupportedSizeAndFrameRate(width, height, frameRate);
>     ASSERT(match);
>     if (!match)
>         return;
> 
>-    setSize(match->size);
>-    setFrameRate(match->frameRate);
>+    setSizeAndFrameRateWithPreset(match->requestedSize, match->requestedFrameRate, match->encodingPreset);
>+
>+    if (!match->requestedSize.isEmpty())
>+        setSize(match->requestedSize);
>+    setFrameRate(match->requestedFrameRate);
> }
> 
> void RealtimeVideoSource::dispatchMediaSampleToObservers(MediaSample& sample)
>diff --git a/Source/WebCore/platform/mediastream/RealtimeVideoSource.h b/Source/WebCore/platform/mediastream/RealtimeVideoSource.h
>index 1fb0334c71c5bacd7e6d6e83f703ea578da27736..3ba373a31db00fd7734804216873c53f4aa17269 100644
>--- a/Source/WebCore/platform/mediastream/RealtimeVideoSource.h
>+++ b/Source/WebCore/platform/mediastream/RealtimeVideoSource.h
>@@ -31,14 +31,12 @@
> #include "ImageBuffer.h"
> #include "MediaSample.h"
> #include "RealtimeMediaSource.h"
>+#include "VideoPreset.h"
> #include <wtf/Lock.h>
> #include <wtf/RunLoop.h>
> 
> namespace WebCore {
> 
>-struct FrameRateRange;
>-struct VideoPreset;
>-
> class RealtimeVideoSource : public RealtimeMediaSource {
> public:
>     virtual ~RealtimeVideoSource();
>@@ -50,16 +48,19 @@ protected:
>     bool supportsSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double>) final;
>     void setSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double>) final;
> 
>-    using VideoPresets = Vector<VideoPreset>;
>-    void setSupportedPresets(VideoPresets&&);
>+    virtual void generatePresets() = 0;
>+    virtual bool prefersPreset(VideoPreset&) { return true; }
>+    virtual void setSizeAndFrameRateWithPreset(IntSize, double, RefPtr<VideoPreset>) { };
>+    virtual bool canResizeVideoFrames() const { return false; }
>+    bool shouldUsePreset(VideoPreset& current, VideoPreset& candidate);
> 
>-    struct CaptureSizeAndFrameRate {
>-        IntSize size;
>-        double frameRate;
>-    };
>-    std::optional<CaptureSizeAndFrameRate> bestSupportedSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double>);
>+    void setSupportedPresets(const Vector<Ref<VideoPreset>>&);
>+    void setSupportedPresets(Vector<VideoPresetData>&&);
>+    const Vector<Ref<VideoPreset>>& presets();
> 
>-    void addSupportedCapabilities(RealtimeMediaSourceCapabilities&) const;
>+    bool frameRateRangeIncludesRate(const FrameRateRange&, double);
>+
>+    void updateCapabilities(RealtimeMediaSourceCapabilities&);
> 
>     void setDefaultSize(const IntSize& size) { m_defaultSize = size; }
> 
>@@ -68,75 +69,21 @@ protected:
>     void dispatchMediaSampleToObservers(MediaSample&);
> 
> private:
>+    struct CaptureSizeAndFrameRate {
>+        RefPtr<VideoPreset> encodingPreset;
>+        IntSize requestedSize;
>+        double requestedFrameRate { 0 };
>+    };
>+    bool supportsCaptureSize(std::optional<int>, std::optional<int>, const Function<bool(const IntSize&)>&&);
>+    std::optional<CaptureSizeAndFrameRate> bestSupportedSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double>);
>+    bool presetSupportsFrameRate(RefPtr<VideoPreset>, double);
> 
>-    VideoPresets m_presets;
>+    Vector<Ref<VideoPreset>> m_presets;
>     Deque<double> m_observedFrameTimeStamps;
>     double m_observedFrameRate { 0 };
>     IntSize m_defaultSize;
> };
> 
>-struct FrameRateRange {
>-    double minimum;
>-    double maximum;
>-
>-    template<class Encoder> void encode(Encoder&) const;
>-    template<class Decoder> static std::optional<FrameRateRange> decode(Decoder&);
>-};
>-
>-template<class Encoder>
>-void FrameRateRange::encode(Encoder& encoder) const
>-{
>-    encoder << minimum;
>-    encoder << maximum;
>-}
>-
>-template <class Decoder>
>-std::optional<FrameRateRange> FrameRateRange::decode(Decoder& decoder)
>-{
>-    std::optional<double> minimum;
>-    decoder >> minimum;
>-    if (!minimum)
>-        return std::nullopt;
>-
>-    std::optional<double> maximum;
>-    decoder >> maximum;
>-    if (!maximum)
>-        return std::nullopt;
>-
>-    return FrameRateRange { *minimum, *maximum };
>-}
>-
>-struct VideoPreset {
>-    IntSize size;
>-    Vector<FrameRateRange> frameRateRanges;
>-
>-    template<class Encoder> void encode(Encoder&) const;
>-    template<class Decoder> static std::optional<VideoPreset> decode(Decoder&);
>-};
>-
>-template<class Encoder>
>-void VideoPreset::encode(Encoder& encoder) const
>-{
>-    encoder << size;
>-    encoder << frameRateRanges;
>-}
>-
>-template <class Decoder>
>-std::optional<VideoPreset> VideoPreset::decode(Decoder& decoder)
>-{
>-    std::optional<IntSize> size;
>-    decoder >> size;
>-    if (!size)
>-        return std::nullopt;
>-
>-    std::optional<Vector<FrameRateRange>> frameRateRanges;
>-    decoder >> frameRateRanges;
>-    if (!frameRateRanges)
>-        return std::nullopt;
>-
>-    return VideoPreset { *size, *frameRateRanges };
>-}
>-
> } // namespace WebCore
> 
> #endif // ENABLE(MEDIA_STREAM)
>diff --git a/Source/WebCore/platform/mediastream/VideoPreset.h b/Source/WebCore/platform/mediastream/VideoPreset.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..9f04098fcda06b40f50182a009557696c71e594b
>--- /dev/null
>+++ b/Source/WebCore/platform/mediastream/VideoPreset.h
>@@ -0,0 +1,133 @@
>+/*
>+ * Copyright (C) 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
>+ * 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 {
>+
>+struct FrameRateRange {
>+    double minimum;
>+    double maximum;
>+
>+    template<class Encoder> void encode(Encoder&) const;
>+    template<class Decoder> static std::optional<FrameRateRange> decode(Decoder&);
>+};
>+
>+template<class Encoder>
>+void FrameRateRange::encode(Encoder& encoder) const
>+{
>+    encoder << minimum;
>+    encoder << maximum;
>+}
>+
>+template <class Decoder>
>+std::optional<FrameRateRange> FrameRateRange::decode(Decoder& decoder)
>+{
>+    std::optional<double> minimum;
>+    decoder >> minimum;
>+    if (!minimum)
>+        return std::nullopt;
>+
>+    std::optional<double> maximum;
>+    decoder >> maximum;
>+    if (!maximum)
>+        return std::nullopt;
>+
>+    return FrameRateRange { *minimum, *maximum };
>+}
>+
>+struct VideoPresetData {
>+    IntSize size;
>+    Vector<FrameRateRange> frameRateRanges;
>+
>+    template<class Encoder> void encode(Encoder&) const;
>+    template<class Decoder> static std::optional<VideoPresetData> decode(Decoder&);
>+};
>+
>+template<class Encoder>
>+void VideoPresetData::encode(Encoder& encoder) const
>+{
>+    encoder << size;
>+    encoder << frameRateRanges;
>+}
>+
>+template <class Decoder>
>+std::optional<VideoPresetData> VideoPresetData::decode(Decoder& decoder)
>+{
>+    std::optional<IntSize> size;
>+    decoder >> size;
>+    if (!size)
>+        return std::nullopt;
>+
>+    std::optional<Vector<FrameRateRange>> frameRateRanges;
>+    decoder >> frameRateRanges;
>+    if (!frameRateRanges)
>+        return std::nullopt;
>+
>+    return VideoPresetData { *size, *frameRateRanges };
>+}
>+
>+class VideoPreset : public RefCounted<VideoPreset> {
>+public:
>+    static Ref<VideoPreset> create(VideoPresetData&& data)
>+    {
>+        return adoptRef(*new VideoPreset(data.size, WTFMove(data.frameRateRanges), Base));
>+    }
>+
>+    enum VideoPresetType {
>+        Base,
>+        AVCapture
>+    };
>+
>+    IntSize size;
>+    Vector<FrameRateRange> frameRateRanges;
>+    VideoPresetType type;
>+
>+protected:
>+    VideoPreset(IntSize size, Vector<FrameRateRange>&& frameRateRanges, VideoPresetType type)
>+        : size(size)
>+        , frameRateRanges(WTFMove(frameRateRanges))
>+        , type(type)
>+    {
>+    }
>+};
>+
>+} // namespace WebCore
>+
>+SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::VideoPreset)
>+    static bool isType(const WebCore::VideoPreset& preset) { return preset.type == WebCore::VideoPreset::VideoPresetType::Base; }
>+SPECIALIZE_TYPE_TRAITS_END()
>+
>+#endif // ENABLE(MEDIA_STREAM)
>+
>diff --git a/Source/WebCore/platform/mediastream/gstreamer/GStreamerAudioCaptureSource.cpp b/Source/WebCore/platform/mediastream/gstreamer/GStreamerAudioCaptureSource.cpp
>index 7e216735d8c137c9c65c0b333a41501199259973..584f87be2aa56f539675f75f4798f166c571ad84 100644
>--- a/Source/WebCore/platform/mediastream/gstreamer/GStreamerAudioCaptureSource.cpp
>+++ b/Source/WebCore/platform/mediastream/gstreamer/GStreamerAudioCaptureSource.cpp
>@@ -136,7 +136,7 @@ void GStreamerAudioCaptureSource::stopProducingData()
>     m_capturer->stop();
> }
> 
>-const RealtimeMediaSourceCapabilities& GStreamerAudioCaptureSource::capabilities() const
>+const RealtimeMediaSourceCapabilities& GStreamerAudioCaptureSource::capabilities()
> {
>     if (m_capabilities)
>         return m_capabilities.value();
>@@ -180,7 +180,7 @@ void GStreamerAudioCaptureSource::settingsDidChange(OptionSet<RealtimeMediaSourc
>     RealtimeMediaSource::settingsDidChange(settings);
> }
> 
>-const RealtimeMediaSourceSettings& GStreamerAudioCaptureSource::settings() const
>+const RealtimeMediaSourceSettings& GStreamerAudioCaptureSource::settings()
> {
>     if (!m_currentSettings) {
>         RealtimeMediaSourceSettings settings;
>diff --git a/Source/WebCore/platform/mediastream/gstreamer/GStreamerAudioCaptureSource.h b/Source/WebCore/platform/mediastream/gstreamer/GStreamerAudioCaptureSource.h
>index 985a2e42d0f60a80690dc71e2d58f3f74f00e150..759e814711527aefd5f0de0ce6dab060504400f1 100644
>--- a/Source/WebCore/platform/mediastream/gstreamer/GStreamerAudioCaptureSource.h
>+++ b/Source/WebCore/platform/mediastream/gstreamer/GStreamerAudioCaptureSource.h
>@@ -33,8 +33,8 @@ public:
>     static CaptureSourceOrError create(const String& deviceID, const MediaConstraints*);
>     WEBCORE_EXPORT static AudioCaptureFactory& factory();
> 
>-    const RealtimeMediaSourceCapabilities& capabilities() const override;
>-    const RealtimeMediaSourceSettings& settings() const override;
>+    const RealtimeMediaSourceCapabilities& capabilities() override;
>+    const RealtimeMediaSourceSettings& settings() override;
> 
>     GstElement* pipeline() { return m_capturer->pipeline(); }
>     GStreamerCapturer* capturer() { return m_capturer.get(); }
>diff --git a/Source/WebCore/platform/mediastream/gstreamer/GStreamerVideoCaptureSource.cpp b/Source/WebCore/platform/mediastream/gstreamer/GStreamerVideoCaptureSource.cpp
>index 0758e540b441ecf4703f35640795cd70c1d4a633..30d157bfe9f0fbc0ac84714555a6f1ec6d39e24e 100644
>--- a/Source/WebCore/platform/mediastream/gstreamer/GStreamerVideoCaptureSource.cpp
>+++ b/Source/WebCore/platform/mediastream/gstreamer/GStreamerVideoCaptureSource.cpp
>@@ -148,7 +148,7 @@ void GStreamerVideoCaptureSource::stopProducingData()
>     setSize({ 0, 0 });
> }
> 
>-const RealtimeMediaSourceCapabilities& GStreamerVideoCaptureSource::capabilities() const
>+const RealtimeMediaSourceCapabilities& GStreamerVideoCaptureSource::capabilities()
> {
>     if (m_capabilities)
>         return m_capabilities.value();
>@@ -234,7 +234,7 @@ const RealtimeMediaSourceCapabilities& GStreamerVideoCaptureSource::capabilities
>     return m_capabilities.value();
> }
> 
>-const RealtimeMediaSourceSettings& GStreamerVideoCaptureSource::settings() const
>+const RealtimeMediaSourceSettings& GStreamerVideoCaptureSource::settings()
> {
>     if (!m_currentSettings) {
>         RealtimeMediaSourceSettings settings;
>diff --git a/Source/WebCore/platform/mediastream/gstreamer/GStreamerVideoCaptureSource.h b/Source/WebCore/platform/mediastream/gstreamer/GStreamerVideoCaptureSource.h
>index 1609b00c49b6bc81c83b7a8c43f84fecf478cb6c..751296a63ca75edd97c782fb5aed1c08d68d29e9 100644
>--- a/Source/WebCore/platform/mediastream/gstreamer/GStreamerVideoCaptureSource.h
>+++ b/Source/WebCore/platform/mediastream/gstreamer/GStreamerVideoCaptureSource.h
>@@ -32,8 +32,8 @@ public:
>     static CaptureSourceOrError create(const String& deviceID, const MediaConstraints*);
>     WEBCORE_EXPORT static VideoCaptureFactory& factory();
> 
>-    const RealtimeMediaSourceCapabilities& capabilities() const override;
>-    const RealtimeMediaSourceSettings& settings() const override;
>+    const RealtimeMediaSourceCapabilities& capabilities() override;
>+    const RealtimeMediaSourceSettings& settings() override;
>     GstElement* pipeline() { return m_capturer->pipeline(); }
>     GStreamerCapturer* capturer() { return m_capturer.get(); }
> 
>diff --git a/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerAudioCaptureSource.cpp b/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerAudioCaptureSource.cpp
>index 995f05720eb90ad4350a1ab7b4545b49d285fcec..9f01e6712020b1afc039ffefc0f076ebdf5574d8 100644
>--- a/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerAudioCaptureSource.cpp
>+++ b/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerAudioCaptureSource.cpp
>@@ -83,12 +83,12 @@ void MockGStreamerAudioCaptureSource::startProducingData()
>     m_wrappedSource->start();
> }
> 
>-const RealtimeMediaSourceSettings& MockGStreamerAudioCaptureSource::settings() const
>+const RealtimeMediaSourceSettings& MockGStreamerAudioCaptureSource::settings()
> {
>     return m_wrappedSource->settings();
> }
> 
>-const RealtimeMediaSourceCapabilities& MockGStreamerAudioCaptureSource::capabilities() const
>+const RealtimeMediaSourceCapabilities& MockGStreamerAudioCaptureSource::capabilities()
> {
>     m_capabilities = m_wrappedSource->capabilities();
>     m_currentSettings = m_wrappedSource->settings();
>diff --git a/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerAudioCaptureSource.h b/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerAudioCaptureSource.h
>index bc11f179b986b63f86b04a01f0b4bd5857b8a9b6..b57181d9a1c9c9ad70f1f56679d3755e454b1083 100644
>--- a/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerAudioCaptureSource.h
>+++ b/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerAudioCaptureSource.h
>@@ -37,8 +37,8 @@ public:
> private:
>     void stopProducingData() final;
>     void startProducingData() final;
>-    const RealtimeMediaSourceSettings& settings() const final;
>-    const RealtimeMediaSourceCapabilities& capabilities() const final;
>+    const RealtimeMediaSourceSettings& settings() final;
>+    const RealtimeMediaSourceCapabilities& capabilities() final;
> 
>     void captureFailed();
>     std::unique_ptr<RealtimeMediaSource> m_wrappedSource;
>diff --git a/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerVideoCaptureSource.cpp b/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerVideoCaptureSource.cpp
>index ead7272bf82a419cb848aa49b0def04a66e81c7a..44d94cc27e32672bb4c442063531bc82f2bcf4cb 100644
>--- a/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerVideoCaptureSource.cpp
>+++ b/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerVideoCaptureSource.cpp
>@@ -118,12 +118,12 @@ void MockGStreamerVideoCaptureSource::applyConstraints(const MediaConstraints& c
>     m_wrappedSource->applyConstraints(constraints, WTFMove(successHandler), WTFMove(failureHandler));
> }
> 
>-const RealtimeMediaSourceSettings& MockGStreamerVideoCaptureSource::settings() const
>+const RealtimeMediaSourceSettings& MockGStreamerVideoCaptureSource::settings()
> {
>     return m_wrappedSource->settings();
> }
> 
>-const RealtimeMediaSourceCapabilities& MockGStreamerVideoCaptureSource::capabilities() const
>+const RealtimeMediaSourceCapabilities& MockGStreamerVideoCaptureSource::capabilities()
> {
>     m_capabilities = m_wrappedSource->capabilities();
>     m_currentSettings = m_wrappedSource->settings();
>diff --git a/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerVideoCaptureSource.h b/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerVideoCaptureSource.h
>index ed3227f9ec566ad21d4a20ec48326fdbff7823fe..d08aa4899585e9a335d2937ec713fcd8979c5f5d 100644
>--- a/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerVideoCaptureSource.h
>+++ b/Source/WebCore/platform/mediastream/gstreamer/MockGStreamerVideoCaptureSource.h
>@@ -42,9 +42,9 @@ public:
> private:
>     void stopProducingData() final;
>     void startProducingData() final;
>-    const RealtimeMediaSourceSettings& settings() const final;
>+    const RealtimeMediaSourceSettings& settings() final;
>     std::unique_ptr<RealtimeMediaSource> m_wrappedSource;
>-    const RealtimeMediaSourceCapabilities& capabilities() const final;
>+    const RealtimeMediaSourceCapabilities& capabilities() final;
>     void captureFailed() override;
> 
>     void videoSampleAvailable(MediaSample&) override;
>diff --git a/Source/WebCore/platform/mediastream/mac/AVVideoCaptureSource.h b/Source/WebCore/platform/mediastream/mac/AVVideoCaptureSource.h
>index 9f2fc3456c4b2a5bdd4b44423e45a3633edfdae9..d38e1ae62650a6e36473b11cb1ec9f1e01422e29 100644
>--- a/Source/WebCore/platform/mediastream/mac/AVVideoCaptureSource.h
>+++ b/Source/WebCore/platform/mediastream/mac/AVVideoCaptureSource.h
>@@ -29,23 +29,29 @@
> 
> #include "IntSizeHash.h"
> #include "OrientationNotifier.h"
>-#include "RealtimeMediaSource.h"
>+#include "RealtimeVideoSource.h"
>+#include <wtf/Lock.h>
> #include <wtf/text/StringHash.h>
> 
> typedef struct opaqueCMSampleBuffer* CMSampleBufferRef;
> 
> OBJC_CLASS AVCaptureConnection;
> OBJC_CLASS AVCaptureDevice;
>+OBJC_CLASS AVCaptureDeviceFormat;
> OBJC_CLASS AVCaptureOutput;
> OBJC_CLASS AVCaptureSession;
> OBJC_CLASS AVCaptureVideoDataOutput;
>+OBJC_CLASS AVFrameRateRange;
> OBJC_CLASS NSError;
> OBJC_CLASS NSNotification;
> OBJC_CLASS WebCoreAVVideoCaptureSourceObserver;
> 
> namespace WebCore {
> 
>-class AVVideoCaptureSource : public RealtimeMediaSource, private OrientationNotifier::Observer {
>+class AVVideoPreset;
>+class PixelBufferResizer;
>+
>+class AVVideoCaptureSource : public RealtimeVideoSource, private OrientationNotifier::Observer {
> public:
>     static CaptureSourceOrError create(const AtomicString&, const MediaConstraints*);
> 
>@@ -72,13 +78,10 @@ private:
>     bool setupCaptureSession();
>     void shutdownCaptureSession();
> 
>-    const RealtimeMediaSourceCapabilities& capabilities() const final;
>-    void setSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double>) final;
>-    void setFrameRate(double);
>-    const RealtimeMediaSourceSettings& settings() const final;
>+    const RealtimeMediaSourceCapabilities& capabilities() final;
>+    const RealtimeMediaSourceSettings& settings() final;
>     void startProducingData() final;
>     void stopProducingData() final;
>-    bool supportsSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double>) final;
>     void settingsDidChange(OptionSet<RealtimeMediaSourceSettings::Flag>) final;
>     void monitorOrientation(OrientationNotifier&) final;
>     void beginConfiguration() final;
>@@ -86,12 +89,14 @@ private:
>     bool isCaptureSource() const final { return true; }
>     bool interrupted() const final;
> 
>+    void setSizeAndFrameRateWithPreset(IntSize, double, RefPtr<VideoPreset>) final;
>+    bool prefersPreset(VideoPreset&) final;
>+    void generatePresets() final;
>+    bool canResizeVideoFrames() const final { return true; }
>+
>     bool setPreset(NSString*);
>     void computeSampleRotation();
>-
>-    bool isFrameRateSupported(double frameRate);
>-
>-    NSString* bestSessionPresetForVideoDimensions(std::optional<int> width, std::optional<int> height);
>+    AVFrameRateRange* frameDurationForFrameRate(double);
> 
>     // OrientationNotifier::Observer API
>     void orientationChanged(int orientation) final;
>@@ -101,34 +106,38 @@ private:
>     void processNewFrame(RetainPtr<CMSampleBufferRef>, RetainPtr<AVCaptureConnection>);
>     IntSize sizeForPreset(NSString*);
> 
>-    using VideoPresetMap = HashMap<String, IntSize>;
>-    VideoPresetMap& videoPresets() { return m_supportedPresets; }
>-
>     AVCaptureDevice* device() const { return m_device.get(); }
> 
>-    RetainPtr<NSString> m_pendingPreset;
>     RetainPtr<CMSampleBufferRef> m_buffer;
>     RetainPtr<AVCaptureVideoDataOutput> m_videoOutput;
> 
>-    IntSize m_presetSize;
>+    IntSize m_requestedSize;
>     int32_t m_width { 0 };
>     int32_t m_height { 0 };
>     int m_sensorOrientation { 0 };
>     int m_deviceOrientation { 0 };
>     MediaSample::VideoRotation m_sampleRotation { MediaSample::VideoRotation::None };
> 
>-    VideoPresetMap m_supportedPresets;
>-
>-    mutable std::optional<RealtimeMediaSourceSettings> m_currentSettings;
>-    mutable std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
>+    std::unique_ptr<PixelBufferResizer> m_pixelBufferResizer;
>+    std::optional<RealtimeMediaSourceSettings> m_currentSettings;
>+    std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
>     RetainPtr<WebCoreAVVideoCaptureSourceObserver> m_objcObserver;
>     RetainPtr<AVCaptureSession> m_session;
>     RetainPtr<AVCaptureDevice> m_device;
>+    RefPtr<VideoPreset> m_pendingPreset;
>+
>+    Lock m_presetMutex;
>+    RefPtr<AVVideoPreset> m_currentPreset;
>+    IntSize m_pendingSize;
>+    double m_pendingFrameRate;
>     InterruptionReason m_interruption { InterruptionReason::None };
>     bool m_isRunning { false };
>-
> };
> 
> } // namespace WebCore
> 
>+SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::AVVideoPreset)
>+    static bool isType(const WebCore::VideoPreset& preset) { return preset.type == WebCore::VideoPreset::VideoPresetType::AVCapture; }
>+SPECIALIZE_TYPE_TRAITS_END()
>+
> #endif // ENABLE(MEDIA_STREAM)
>diff --git a/Source/WebCore/platform/mediastream/mac/AVVideoCaptureSource.mm b/Source/WebCore/platform/mediastream/mac/AVVideoCaptureSource.mm
>index f3bd4100246d55e90783f2b4f1d2f7e3e852a06e..adf1ff346e73b3581250b24d5347d98db98233fa 100644
>--- a/Source/WebCore/platform/mediastream/mac/AVVideoCaptureSource.mm
>+++ b/Source/WebCore/platform/mediastream/mac/AVVideoCaptureSource.mm
>@@ -33,6 +33,7 @@
> #import "Logging.h"
> #import "MediaConstraints.h"
> #import "MediaSampleAVFObjC.h"
>+#import "PixelBufferResizer.h"
> #import "PlatformLayer.h"
> #import "RealtimeMediaSourceCenterMac.h"
> #import "RealtimeMediaSourceSettings.h"
>@@ -75,29 +76,14 @@ SOFT_LINK_CLASS(AVFoundation, AVCaptureSession)
> #define AVFrameRateRange getAVFrameRateRangeClass()
> 
> SOFT_LINK_CONSTANT(AVFoundation, AVMediaTypeVideo, NSString *)
>-SOFT_LINK_CONSTANT_MAY_FAIL(AVFoundation, AVCaptureSessionPreset1280x720, NSString *)
>-SOFT_LINK_CONSTANT_MAY_FAIL(AVFoundation, AVCaptureSessionPreset960x540, NSString *)
>-SOFT_LINK_CONSTANT_MAY_FAIL(AVFoundation, AVCaptureSessionPreset640x480, NSString *)
>-SOFT_LINK_CONSTANT_MAY_FAIL(AVFoundation, AVCaptureSessionPreset352x288, NSString *)
>-SOFT_LINK_CONSTANT_MAY_FAIL(AVFoundation, AVCaptureSessionPreset320x240, NSString *)
>-
>-#define AVCaptureSessionPreset1280x720 getAVCaptureSessionPreset1280x720()
>-#define AVCaptureSessionPreset960x540 getAVCaptureSessionPreset960x540()
>-#define AVCaptureSessionPreset640x480 getAVCaptureSessionPreset640x480()
>-#define AVCaptureSessionPreset352x288 getAVCaptureSessionPreset352x288()
>-#define AVCaptureSessionPreset320x240 getAVCaptureSessionPreset320x240()
> 
> #if PLATFORM(IOS)
>-SOFT_LINK_CONSTANT_MAY_FAIL(AVFoundation, AVCaptureSessionPreset3840x2160, NSString *)
>-SOFT_LINK_CONSTANT_MAY_FAIL(AVFoundation, AVCaptureSessionPreset1920x1080, NSString *)
> SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVCaptureSessionRuntimeErrorNotification, NSString *)
> SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVCaptureSessionWasInterruptedNotification, NSString *)
> SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVCaptureSessionInterruptionEndedNotification, NSString *)
> SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVCaptureSessionInterruptionReasonKey, NSString *)
> SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVCaptureSessionErrorKey, NSString *)
> 
>-#define AVCaptureSessionPreset3840x2160 getAVCaptureSessionPreset3840x2160()
>-#define AVCaptureSessionPreset1920x1080 getAVCaptureSessionPreset1920x1080()
> #define AVCaptureSessionRuntimeErrorNotification getAVCaptureSessionRuntimeErrorNotification()
> #define AVCaptureSessionWasInterruptedNotification getAVCaptureSessionWasInterruptedNotification()
> #define AVCaptureSessionInterruptionEndedNotification getAVCaptureSessionInterruptionEndedNotification()
>@@ -106,6 +92,7 @@ SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVCaptureSessionErrorKey, NSString *)
> #endif
> 
> using namespace WebCore;
>+using namespace PAL;
> 
> @interface WebCoreAVVideoCaptureSourceObserver : NSObject<AVCaptureVideoDataOutputSampleBufferDelegate> {
>     AVVideoCaptureSource* m_callback;
>@@ -142,6 +129,22 @@ static dispatch_queue_t globaVideoCaptureSerialQueue()
>     return globalQueue;
> }
> 
>+class AVVideoPreset : public VideoPreset {
>+public:
>+    static Ref<AVVideoPreset> create(IntSize size, Vector<FrameRateRange>&& frameRateRanges, AVCaptureDeviceFormatType* format)
>+    {
>+        return adoptRef(*new AVVideoPreset(size, WTFMove(frameRateRanges), format));
>+    }
>+
>+    AVVideoPreset(IntSize size, Vector<FrameRateRange>&& frameRateRanges, AVCaptureDeviceFormatType* format)
>+        : VideoPreset(size, WTFMove(frameRateRanges), AVCapture)
>+        , format(format)
>+    {
>+    }
>+
>+    RetainPtr<AVCaptureDeviceFormatType> format;
>+};
>+
> CaptureSourceOrError AVVideoCaptureSource::create(const AtomicString& id, const MediaConstraints* constraints)
> {
>     AVCaptureDeviceTypedef *device = [getAVCaptureDeviceClass() deviceWithUniqueID:id];
>@@ -159,46 +162,10 @@ CaptureSourceOrError AVVideoCaptureSource::create(const AtomicString& id, const
> }
> 
> AVVideoCaptureSource::AVVideoCaptureSource(AVCaptureDeviceTypedef* device, const AtomicString& id)
>-    : RealtimeMediaSource(id, Type::Video, device.localizedName)
>+    : RealtimeVideoSource(id, device.localizedName)
>     , m_objcObserver(adoptNS([[WebCoreAVVideoCaptureSourceObserver alloc] initWithCallback:this]))
>     , m_device(device)
> {
>-    struct VideoPreset {
>-        NSString* name;
>-        int width;
>-        int height;
>-    };
>-
>-    static NeverDestroyed<Vector<VideoPreset>> presets = [] {
>-        Vector<VideoPreset> sets;
>-#if PLATFORM(IOS)
>-        if (canLoadAVCaptureSessionPreset3840x2160())
>-            sets.append({ AVCaptureSessionPreset3840x2160, 3840, 2160 });
>-        if (canLoadAVCaptureSessionPreset1920x1080())
>-            sets.append({ AVCaptureSessionPreset1920x1080, 1920, 1080 });
>-#endif
>-        if (canLoadAVCaptureSessionPreset1280x720())
>-            sets.append({ AVCaptureSessionPreset1280x720, 1280, 720 });
>-        if (canLoadAVCaptureSessionPreset960x540())
>-            sets.append({ AVCaptureSessionPreset960x540, 960, 540 });
>-        if (canLoadAVCaptureSessionPreset640x480())
>-            sets.append({ AVCaptureSessionPreset640x480, 640, 480 });
>-        if (canLoadAVCaptureSessionPreset352x288())
>-            sets.append({ AVCaptureSessionPreset352x288, 352, 288 });
>-        if (canLoadAVCaptureSessionPreset320x240())
>-            sets.append({ AVCaptureSessionPreset320x240, 320, 240 });
>-
>-        return sets;
>-    }();
>-
>-    auto* presetsMap = &videoPresets();
>-    for (auto& preset : presets.get()) {
>-        if (![device supportsAVCaptureSessionPreset:preset.name])
>-            continue;
>-
>-        presetsMap->add(String(preset.name), IntSize(preset.width, preset.height));
>-    }
>-
> #if PLATFORM(IOS)
>     static_assert(static_cast<int>(InterruptionReason::VideoNotAllowedInBackground) == static_cast<int>(AVCaptureSessionInterruptionReasonVideoDeviceNotAvailableInBackground), "InterruptionReason::VideoNotAllowedInBackground is not AVCaptureSessionInterruptionReasonVideoDeviceNotAvailableInBackground as expected");
>     static_assert(static_cast<int>(InterruptionReason::VideoNotAllowedInSideBySide) == AVCaptureSessionInterruptionReasonVideoDeviceNotAvailableWithMultipleForegroundApps, "InterruptionReason::VideoNotAllowedInSideBySide is not AVCaptureSessionInterruptionReasonVideoDeviceNotAvailableWithMultipleForegroundApps as expected");
>@@ -255,18 +222,6 @@ void AVVideoCaptureSource::stopProducingData()
> #endif
> }
> 
>-static void updateSizeMinMax(int& min, int& max, int value)
>-{
>-    min = std::min<int>(min, value);
>-    max = std::max<int>(max, value);
>-}
>-
>-static void updateAspectRatioMinMax(double& min, double& max, double value)
>-{
>-    min = std::min<double>(min, value);
>-    max = std::max<double>(max, value);
>-}
>-
> void AVVideoCaptureSource::beginConfiguration()
> {
>     if (m_session)
>@@ -285,7 +240,7 @@ void AVVideoCaptureSource::settingsDidChange(OptionSet<RealtimeMediaSourceSettin
>     RealtimeMediaSource::settingsDidChange(settings);
> }
> 
>-const RealtimeMediaSourceSettings& AVVideoCaptureSource::settings() const
>+const RealtimeMediaSourceSettings& AVVideoCaptureSource::settings()
> {
>     if (m_currentSettings)
>         return *m_currentSettings;
>@@ -298,10 +253,10 @@ const RealtimeMediaSourceSettings& AVVideoCaptureSource::settings() const
>     else
>         settings.setFacingMode(RealtimeMediaSourceSettings::Unknown);
> 
>-    auto maxFrameDuration = [device() activeVideoMaxFrameDuration];
>-    settings.setFrameRate(maxFrameDuration.timescale / maxFrameDuration.value);
>-    settings.setWidth(m_width);
>-    settings.setHeight(m_height);
>+    settings.setFrameRate(frameRate());
>+    auto& size = this->size();
>+    settings.setWidth(size.width());
>+    settings.setHeight(size.height());
>     settings.setDeviceId(id());
> 
>     RealtimeMediaSourceSupportedConstraints supportedConstraints;
>@@ -319,147 +274,92 @@ const RealtimeMediaSourceSettings& AVVideoCaptureSource::settings() const
>     return *m_currentSettings;
> }
> 
>-const RealtimeMediaSourceCapabilities& AVVideoCaptureSource::capabilities() const
>+const RealtimeMediaSourceCapabilities& AVVideoCaptureSource::capabilities()
> {
>     if (m_capabilities)
>         return *m_capabilities;
> 
>     RealtimeMediaSourceCapabilities capabilities(settings().supportedConstraints());
>     capabilities.setDeviceId(id());
>-    AVCaptureDeviceTypedef *videoDevice = device();
> 
>+    AVCaptureDeviceTypedef *videoDevice = device();
>     if ([videoDevice position] == AVCaptureDevicePositionFront)
>         capabilities.addFacingMode(RealtimeMediaSourceSettings::User);
>     if ([videoDevice position] == AVCaptureDevicePositionBack)
>         capabilities.addFacingMode(RealtimeMediaSourceSettings::Environment);
> 
>-    Float64 lowestFrameRateRange = std::numeric_limits<double>::infinity();
>-    Float64 highestFrameRateRange = 0;
>-    int minimumWidth = std::numeric_limits<int>::infinity();
>-    int maximumWidth = 0;
>-    int minimumHeight = std::numeric_limits<int>::infinity();
>-    int maximumHeight = 0;
>-    double minimumAspectRatio = std::numeric_limits<double>::infinity();
>-    double maximumAspectRatio = 0;
>-
>-    for (AVCaptureDeviceFormatType *format in [videoDevice formats]) {
>-
>-        for (AVFrameRateRangeType *range in [format videoSupportedFrameRateRanges]) {
>-            lowestFrameRateRange = std::min<Float64>(lowestFrameRateRange, range.minFrameRate);
>-            highestFrameRateRange = std::max<Float64>(highestFrameRateRange, range.maxFrameRate);
>-        }
>-    }
>-
>-    for (auto& preset : m_supportedPresets) {
>-        auto values = preset.value;
>-        updateSizeMinMax(minimumWidth, maximumWidth, values.width());
>-        updateSizeMinMax(minimumHeight, maximumHeight, values.height());
>-        updateAspectRatioMinMax(minimumAspectRatio, maximumAspectRatio, static_cast<double>(values.width()) / values.height());
>-    }
>-    capabilities.setFrameRate(CapabilityValueOrRange(lowestFrameRateRange, highestFrameRateRange));
>-    capabilities.setWidth(CapabilityValueOrRange(minimumWidth, maximumWidth));
>-    capabilities.setHeight(CapabilityValueOrRange(minimumHeight, maximumHeight));
>-    capabilities.setAspectRatio(CapabilityValueOrRange(minimumAspectRatio, maximumAspectRatio));
>+    updateCapabilities(capabilities);
> 
>     m_capabilities = WTFMove(capabilities);
> 
>     return *m_capabilities;
> }
> 
>-IntSize AVVideoCaptureSource::sizeForPreset(NSString* preset)
>+bool AVVideoCaptureSource::prefersPreset(VideoPreset& preset)
> {
>-    if (!preset)
>-        return { };
>-
>-    auto& presets = videoPresets();
>-    auto it = presets.find(String(preset));
>-    if (it != presets.end())
>-        return { it->value.width(), it->value.height() };
>+#if PLATFORM(IOS)
>+    return ![static_cast<AVVideoPreset*>(&preset)->format.get() isVideoBinned];
>+#else
>+    UNUSED_PARAM(preset);
>+#endif
> 
>-    return { };
>+    return true;
> }
> 
>-bool AVVideoCaptureSource::setPreset(NSString *preset)
>+void AVVideoCaptureSource::setSizeAndFrameRateWithPreset(IntSize requestedSize, double requestedFrameRate, RefPtr<VideoPreset> preset)
> {
>-    if (!session()) {
>-        m_pendingPreset = preset;
>-        return true;
>-    }
>-
>-    auto size = sizeForPreset(preset);
>-    if (m_presetSize == size)
>-        return true;
>-
>-    m_presetSize = size;
>+    auto* avPreset = preset ? downcast<AVVideoPreset>(preset.get()) : nullptr;
> 
>-    @try {
>-        session().sessionPreset = preset;
>-#if PLATFORM(MAC)
>-        auto settingsDictionary = @{
>-            (__bridge NSString *)kCVPixelBufferPixelFormatTypeKey: @(videoCaptureFormat),
>-            (__bridge NSString *)kCVPixelBufferWidthKey: @(size.width()),
>-            (__bridge NSString *)kCVPixelBufferHeightKey: @(size.height())
>-        };
>-        [m_videoOutput setVideoSettings:settingsDictionary];
>-#endif
>-    } @catch(NSException *exception) {
>-        LOG(Media, "AVVideoCaptureSource::setPreset(%p), exception thrown configuring device: <%s> %s", this, [[exception name] UTF8String], [[exception reason] UTF8String]);
>-        return false;
>+    if (!m_session) {
>+        m_pendingPreset = avPreset;
>+        m_pendingSize = requestedSize;
>+        m_pendingFrameRate = requestedFrameRate;
>+        return;
>     }
> 
>-    return true;
>-}
>+    m_pendingPreset = nullptr;
>+    m_pendingFrameRate = 0;
> 
>-void AVVideoCaptureSource::setFrameRate(double rate)
>-{
>-    using namespace PAL;
>-    double epsilon = 0.00001;
>-    AVFrameRateRangeType *bestFrameRateRange = nil;
>-    for (AVFrameRateRangeType *frameRateRange in [[device() activeFormat] videoSupportedFrameRateRanges]) {
>-        if (rate + epsilon >= [frameRateRange minFrameRate] && rate - epsilon <= [frameRateRange maxFrameRate]) {
>-            if (!bestFrameRateRange || CMTIME_COMPARE_INLINE([frameRateRange minFrameDuration], >, [bestFrameRateRange minFrameDuration]))
>-                bestFrameRateRange = frameRateRange;
>-        }
>-    }
>+    auto* frameRateRange = frameDurationForFrameRate(requestedFrameRate);
>+    ASSERT(frameRateRange);
>+    if (!frameRateRange)
>+        return;
> 
>-    if (!bestFrameRateRange || !isFrameRateSupported(rate)) {
>-        LOG(Media, "AVVideoCaptureSource::setFrameRate(%p), frame rate %f not supported by video device", this, rate);
>+    if (!avPreset)
>         return;
>-    }
>+
>+    ASSERT(avPreset->format);
>+
>+    m_requestedSize = requestedSize;
> 
>     NSError *error = nil;
>+    [m_session beginConfiguration];
>     @try {
>         if ([device() lockForConfiguration:&error]) {
>-            if (bestFrameRateRange.minFrameRate == bestFrameRateRange.maxFrameRate) {
>-                [device() setActiveVideoMinFrameDuration:[bestFrameRateRange minFrameDuration]];
>-                [device() setActiveVideoMaxFrameDuration:[bestFrameRateRange maxFrameDuration]];
>-            } else {
>-                [device() setActiveVideoMinFrameDuration: CMTimeMake(1, rate)];
>-                [device() setActiveVideoMaxFrameDuration: CMTimeMake(1, rate)];
>+            if (!m_currentPreset || ![m_currentPreset->format.get() isEqual:avPreset->format.get()]) {
>+                [device() setActiveFormat:avPreset->format.get()];
>+#if PLATFORM(MAC)
>+                auto settingsDictionary = @{
>+                    (__bridge NSString *)kCVPixelBufferPixelFormatTypeKey: @(videoCaptureFormat),
>+                    (__bridge NSString *)kCVPixelBufferWidthKey: @(avPreset->size.width()),
>+                    (__bridge NSString *)kCVPixelBufferHeightKey: @(avPreset->size.height())
>+                };
>+                [m_videoOutput setVideoSettings:settingsDictionary];
>+#endif
>             }
>+            [device() setActiveVideoMinFrameDuration:[frameRateRange minFrameDuration]];
>+            [device() setActiveVideoMaxFrameDuration:[frameRateRange maxFrameDuration]];
>             [device() unlockForConfiguration];
>         }
>     } @catch(NSException *exception) {
>-        LOG(Media, "AVVideoCaptureSource::setFrameRate(%p), exception thrown configuring device: <%s> %s", this, [[exception name] UTF8String], [[exception reason] UTF8String]);
>-        return;
>+        RELEASE_LOG(Media, "AVVideoCaptureSource::setFrameRate - exception thrown configuring device: <%s> %s", [[exception name] UTF8String], [[exception reason] UTF8String]);
>     }
>+    [m_session commitConfiguration];
> 
>-    if (error) {
>-        LOG(Media, "AVVideoCaptureSource::setFrameRate(%p), failed to lock video device for configuration: %s", this, [[error localizedDescription] UTF8String]);
>-        return;
>-    }
>-
>-    LOG(Media, "AVVideoCaptureSource::setFrameRate(%p) - set frame rate range to %f", this, rate);
>-    return;
>-}
>-
>-void AVVideoCaptureSource::setSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double> frameRate)
>-{
>-    if (width || height)
>-        setPreset(bestSessionPresetForVideoDimensions(WTFMove(width), WTFMove(height)));
>+    m_currentPreset = avPreset;
> 
>-    if (frameRate)
>-        setFrameRate(frameRate.value());
>+    if (error)
>+        RELEASE_LOG(Media, "AVVideoCaptureSource::setFrameRate - failed to lock video device for configuration: %s", [[error localizedDescription] UTF8String]);
> }
> 
> static inline int sensorOrientation(AVCaptureVideoOrientation videoOrientation)
>@@ -513,6 +413,22 @@ bool AVVideoCaptureSource::setupSession()
>     return success;
> }
> 
>+AVFrameRateRangeType* AVVideoCaptureSource::frameDurationForFrameRate(double rate)
>+{
>+    AVFrameRateRangeType *bestFrameRateRange = nil;
>+    for (AVFrameRateRangeType *frameRateRange in [[device() activeFormat] videoSupportedFrameRateRanges]) {
>+        if (frameRateRangeIncludesRate({ [frameRateRange minFrameRate], [frameRateRange maxFrameRate] }, rate)) {
>+            if (!bestFrameRateRange || CMTIME_COMPARE_INLINE([frameRateRange minFrameDuration], >, [bestFrameRateRange minFrameDuration]))
>+                bestFrameRateRange = frameRateRange;
>+        }
>+    }
>+
>+    if (!bestFrameRateRange)
>+        RELEASE_LOG(Media, "AVVideoCaptureSource::frameDurationForFrameRate, no frame rate range for rate %g", rate);
>+
>+    return bestFrameRateRange;
>+}
>+
> bool AVVideoCaptureSource::setupCaptureSession()
> {
> #if PLATFORM(IOS)
>@@ -534,13 +450,6 @@ bool AVVideoCaptureSource::setupCaptureSession()
> 
>     m_videoOutput = adoptNS([allocAVCaptureVideoDataOutputInstance() init]);
>     auto settingsDictionary = adoptNS([[NSMutableDictionary alloc] initWithObjectsAndKeys: [NSNumber numberWithInt:videoCaptureFormat], kCVPixelBufferPixelFormatTypeKey, nil]);
>-    if (m_pendingPreset) {
>-#if PLATFORM(MAC)
>-        auto size = sizeForPreset(m_pendingPreset.get());
>-        [settingsDictionary setObject:@(size.width()) forKey:(__bridge NSString *)kCVPixelBufferWidthKey];
>-        [settingsDictionary setObject:@(size.height()) forKey:(__bridge NSString *)kCVPixelBufferHeightKey];
>-#endif
>-    }
> 
>     [m_videoOutput setVideoSettings:settingsDictionary.get()];
>     [m_videoOutput setAlwaysDiscardsLateVideoFrames:YES];
>@@ -552,9 +461,8 @@ bool AVVideoCaptureSource::setupCaptureSession()
>     }
>     [session() addOutput:m_videoOutput.get()];
> 
>-#if PLATFORM(IOS)
>-    setPreset(m_pendingPreset.get());
>-#endif
>+    if (m_pendingPreset || m_pendingFrameRate)
>+        setSizeAndFrameRateWithPreset(m_pendingSize, m_pendingFrameRate, m_pendingPreset);
> 
>     m_sensorOrientation = sensorOrientationFromVideoOutput(m_videoOutput.get());
>     computeSampleRotation();
>@@ -615,25 +523,20 @@ void AVVideoCaptureSource::processNewFrame(RetainPtr<CMSampleBufferRef> sampleBu
>     if (!isProducingData() || muted())
>         return;
> 
>-    CMFormatDescriptionRef formatDescription = PAL::CMSampleBufferGetFormatDescription(sampleBuffer.get());
>+
>+    CMFormatDescriptionRef formatDescription = CMSampleBufferGetFormatDescription(sampleBuffer.get());
>     if (!formatDescription)
>         return;
> 
>     m_buffer = sampleBuffer;
>-    CMVideoDimensions dimensions = PAL::CMVideoFormatDescriptionGetDimensions(formatDescription);
>+    CMVideoDimensions dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
>     if (m_sampleRotation == MediaSample::VideoRotation::Left || m_sampleRotation == MediaSample::VideoRotation::Right)
>         std::swap(dimensions.width, dimensions.height);
> 
>     if (dimensions.width != m_width || dimensions.height != m_height) {
>-        OptionSet<RealtimeMediaSourceSettings::Flag> changed;
>-        if (m_width != dimensions.width)
>-            changed.add(RealtimeMediaSourceSettings::Flag::Width);
>-        if (m_height != dimensions.height)
>-            changed.add(RealtimeMediaSourceSettings::Flag::Height);
>-
>         m_width = dimensions.width;
>         m_height = dimensions.height;
>-        settingsDidChange(changed);
>+        setSize({ dimensions.width, dimensions.height });
>     }
> 
>     videoSampleAvailable(MediaSampleAVFObjC::create(m_buffer.get(), m_sampleRotation, [connection isVideoMirrored]));
>@@ -641,55 +544,30 @@ void AVVideoCaptureSource::processNewFrame(RetainPtr<CMSampleBufferRef> sampleBu
> 
> void AVVideoCaptureSource::captureOutputDidOutputSampleBufferFromConnection(AVCaptureOutputType*, CMSampleBufferRef sampleBuffer, AVCaptureConnectionType* captureConnection)
> {
>-    RetainPtr<CMSampleBufferRef> buffer = sampleBuffer;
>-    RetainPtr<AVCaptureConnectionType> connection = captureConnection;
>-
>-    scheduleDeferredTask([this, buffer, connection] {
>-        this->processNewFrame(buffer, connection);
>-    });
>-}
>-
>-NSString* AVVideoCaptureSource::bestSessionPresetForVideoDimensions(std::optional<int> width, std::optional<int> height)
>-{
>-    if (!width && !height)
>-        return nil;
>-
>-    int widthValue = width ? width.value() : 0;
>-    int heightValue = height ? height.value() : 0;
>+    CMFormatDescriptionRef formatDescription = CMSampleBufferGetFormatDescription(sampleBuffer);
>+    if (!formatDescription)
>+        return;
> 
>-    for (auto& preset : videoPresets()) {
>-        auto size = preset.value;
>-        NSString* name = preset.key;
>+    CMVideoDimensions dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
>+    if (dimensions.width != m_requestedSize.width() || dimensions.height != m_requestedSize.height()) {
>+        if (m_pixelBufferResizer && !m_pixelBufferResizer->canResizeTo(m_requestedSize))
>+            m_pixelBufferResizer = nullptr;
> 
>-        if ((!widthValue || widthValue == size.width()) && (!heightValue || heightValue == size.height()))
>-            return name;
>-    }
>+        if (!m_pixelBufferResizer)
>+            m_pixelBufferResizer = std::make_unique<PixelBufferResizer>(m_requestedSize, videoCaptureFormat);
>+    } else
>+        m_pixelBufferResizer = nullptr;
> 
>-    return nil;
>-}
>-
>-bool AVVideoCaptureSource::isFrameRateSupported(double frameRate)
>-{
>-    double epsilon = 0.001;
>-    for (AVFrameRateRangeType *range in [[device() activeFormat] videoSupportedFrameRateRanges]) {
>-        if (frameRate + epsilon >= range.minFrameRate && frameRate - epsilon <= range.maxFrameRate)
>-            return true;
>+    auto buffer = retainPtr(sampleBuffer);
>+    if (m_pixelBufferResizer) {
>+        buffer = m_pixelBufferResizer->resize(sampleBuffer);
>+        if (!buffer)
>+            return;
>     }
>-    return false;
>-}
>-
>-bool AVVideoCaptureSource::supportsSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double> frameRate)
>-{
>-    if (!height && !width && !frameRate)
>-        return true;
> 
>-    if ((height || width) && !bestSessionPresetForVideoDimensions(WTFMove(width), WTFMove(height)))
>-        return false;
>-
>-    if (!frameRate)
>-        return true;
>-
>-    return isFrameRateSupported(frameRate.value());
>+    scheduleDeferredTask([this, buffer, connection = retainPtr(captureConnection)] {
>+        this->processNewFrame(buffer, connection);
>+    });
> }
> 
> void AVVideoCaptureSource::captureSessionIsRunningDidChange(bool state)
>@@ -711,6 +589,29 @@ bool AVVideoCaptureSource::interrupted() const
>     return RealtimeMediaSource::interrupted();
> }
> 
>+void AVVideoCaptureSource::generatePresets()
>+{
>+    Vector<Ref<VideoPreset>> presets;
>+    for (AVCaptureDeviceFormatType* format in [device() formats]) {
>+
>+        CMVideoDimensions dimensions = CMVideoFormatDescriptionGetDimensions(format.formatDescription);
>+        IntSize size = {dimensions.width, dimensions.height};
>+        auto index = presets.findMatching([&size](auto& preset) {
>+            return size == preset->size;
>+        });
>+        if (index != notFound)
>+            continue;
>+
>+        Vector<FrameRateRange> frameRates;
>+        for (AVFrameRateRangeType *range in [format videoSupportedFrameRateRanges])
>+            frameRates.append({ range.minFrameRate, range.maxFrameRate});
>+
>+        presets.append(AVVideoPreset::create(size, WTFMove(frameRates), format));
>+    }
>+
>+    setSupportedPresets(WTFMove(presets));
>+}
>+
> #if PLATFORM(IOS)
> void AVVideoCaptureSource::captureSessionRuntimeError(RetainPtr<NSError> error)
> {
>diff --git a/Source/WebCore/platform/mediastream/mac/CoreAudioCaptureSource.cpp b/Source/WebCore/platform/mediastream/mac/CoreAudioCaptureSource.cpp
>index 7d727cca63b5fa8169c7015392cf34b57c5f55c8..e6cc41f7a2808546b4d4877754f030113356b37d 100644
>--- a/Source/WebCore/platform/mediastream/mac/CoreAudioCaptureSource.cpp
>+++ b/Source/WebCore/platform/mediastream/mac/CoreAudioCaptureSource.cpp
>@@ -841,7 +841,7 @@ void CoreAudioCaptureSource::stopProducingData()
>     unit.stopProducingData();
> }
> 
>-const RealtimeMediaSourceCapabilities& CoreAudioCaptureSource::capabilities() const
>+const RealtimeMediaSourceCapabilities& CoreAudioCaptureSource::capabilities()
> {
>     if (!m_capabilities) {
>         RealtimeMediaSourceCapabilities capabilities(settings().supportedConstraints());
>@@ -854,7 +854,7 @@ const RealtimeMediaSourceCapabilities& CoreAudioCaptureSource::capabilities() co
>     return m_capabilities.value();
> }
> 
>-const RealtimeMediaSourceSettings& CoreAudioCaptureSource::settings() const
>+const RealtimeMediaSourceSettings& CoreAudioCaptureSource::settings()
> {
>     if (!m_currentSettings) {
>         RealtimeMediaSourceSettings settings;
>diff --git a/Source/WebCore/platform/mediastream/mac/CoreAudioCaptureSource.h b/Source/WebCore/platform/mediastream/mac/CoreAudioCaptureSource.h
>index c40d3c6c34d60cf4ba9ccedbf021d3d593d2ddba..476d3d63fb719fe191b4dc01d1b32a55cd19640e 100644
>--- a/Source/WebCore/platform/mediastream/mac/CoreAudioCaptureSource.h
>+++ b/Source/WebCore/platform/mediastream/mac/CoreAudioCaptureSource.h
>@@ -86,16 +86,16 @@ private:
> 
>     std::optional<Vector<int>> discreteSampleRates() const final { return { { 8000, 16000, 32000, 44100, 48000, 96000 } }; }
> 
>-    const RealtimeMediaSourceCapabilities& capabilities() const final;
>-    const RealtimeMediaSourceSettings& settings() const final;
>+    const RealtimeMediaSourceCapabilities& capabilities() final;
>+    const RealtimeMediaSourceSettings& settings() final;
>     void settingsDidChange(OptionSet<RealtimeMediaSourceSettings::Flag>) final;
> 
>     bool interrupted() const final;
> 
>     uint32_t m_captureDeviceID { 0 };
> 
>-    mutable std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
>-    mutable std::optional<RealtimeMediaSourceSettings> m_currentSettings;
>+    std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
>+    std::optional<RealtimeMediaSourceSettings> m_currentSettings;
> 
>     enum class SuspensionType { None, WhilePaused, WhilePlaying };
>     SuspensionType m_suspendType { SuspensionType::None };
>diff --git a/Source/WebCore/platform/mediastream/mac/DisplayCaptureSourceCocoa.cpp b/Source/WebCore/platform/mediastream/mac/DisplayCaptureSourceCocoa.cpp
>index 3ecd5ca2cded4175f5d47fa07e8c8990916a2341..119185c49c62687fa7ce4772083e899aeb6508be 100644
>--- a/Source/WebCore/platform/mediastream/mac/DisplayCaptureSourceCocoa.cpp
>+++ b/Source/WebCore/platform/mediastream/mac/DisplayCaptureSourceCocoa.cpp
>@@ -60,7 +60,7 @@ DisplayCaptureSourceCocoa::~DisplayCaptureSourceCocoa()
> #endif
> }
> 
>-const RealtimeMediaSourceCapabilities& DisplayCaptureSourceCocoa::capabilities() const
>+const RealtimeMediaSourceCapabilities& DisplayCaptureSourceCocoa::capabilities()
> {
>     if (!m_capabilities) {
>         RealtimeMediaSourceCapabilities capabilities(settings().supportedConstraints());
>@@ -75,7 +75,7 @@ const RealtimeMediaSourceCapabilities& DisplayCaptureSourceCocoa::capabilities()
>     return m_capabilities.value();
> }
> 
>-const RealtimeMediaSourceSettings& DisplayCaptureSourceCocoa::settings() const
>+const RealtimeMediaSourceSettings& DisplayCaptureSourceCocoa::settings()
> {
>     if (!m_currentSettings) {
>         RealtimeMediaSourceSettings settings;
>diff --git a/Source/WebCore/platform/mediastream/mac/DisplayCaptureSourceCocoa.h b/Source/WebCore/platform/mediastream/mac/DisplayCaptureSourceCocoa.h
>index d8263d5968b0bb1b77619cefa90c3986ec0b94c8..7e39eee35bab6b4a859fed43b51c2f684a48dd22 100644
>--- a/Source/WebCore/platform/mediastream/mac/DisplayCaptureSourceCocoa.h
>+++ b/Source/WebCore/platform/mediastream/mac/DisplayCaptureSourceCocoa.h
>@@ -69,13 +69,13 @@ private:
> 
>     bool isCaptureSource() const final { return true; }
> 
>-    const RealtimeMediaSourceCapabilities& capabilities() const final;
>-    const RealtimeMediaSourceSettings& settings() const final;
>+    const RealtimeMediaSourceCapabilities& capabilities() final;
>+    const RealtimeMediaSourceSettings& settings() final;
> 
>     void emitFrame();
> 
>-    mutable std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
>-    mutable std::optional<RealtimeMediaSourceSettings> m_currentSettings;
>+    std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
>+    std::optional<RealtimeMediaSourceSettings> m_currentSettings;
>     RealtimeMediaSourceSupportedConstraints m_supportedConstraints;
> 
>     MonotonicTime m_startTime { MonotonicTime::nan() };
>diff --git a/Source/WebCore/platform/mediastream/mac/MockRealtimeVideoSourceMac.h b/Source/WebCore/platform/mediastream/mac/MockRealtimeVideoSourceMac.h
>index 73129e1be7cb6dcc166fd556e00fd195ec44374e..0b6e0ab47252495c5b550b68f4d27ce799f19314 100644
>--- a/Source/WebCore/platform/mediastream/mac/MockRealtimeVideoSourceMac.h
>+++ b/Source/WebCore/platform/mediastream/mac/MockRealtimeVideoSourceMac.h
>@@ -43,6 +43,8 @@ typedef struct __CVPixelBufferPool *CVPixelBufferPoolRef;
> 
> namespace WebCore {
> 
>+class PixelBufferResizer;
>+
> class MockRealtimeVideoSourceMac final : public MockRealtimeVideoSource, private OrientationNotifier::Observer {
> public:
>     virtual ~MockRealtimeVideoSourceMac() = default;
>@@ -57,15 +59,17 @@ private:
>     PlatformLayer* platformLayer() const;
>     void updateSampleBuffer() final;
>     void settingsDidChange(OptionSet<RealtimeMediaSourceSettings::Flag>) final;
>+    bool canResizeVideoFrames() const final { return true; }
>+    void setSizeAndFrameRateWithPreset(IntSize, double, RefPtr<VideoPreset>) final;
> 
>     void orientationChanged(int orientation) final;
>     void monitorOrientation(OrientationNotifier&) final;
> 
>-    mutable RetainPtr<CGImageRef> m_previewImage;
>-    mutable RetainPtr<PlatformLayer> m_previewLayer;
>     mutable RetainPtr<CVPixelBufferPoolRef> m_bufferPool;
>     MediaSample::VideoRotation m_deviceOrientation { MediaSample::VideoRotation::None };
>     std::unique_ptr<PixelBufferConformerCV> m_pixelBufferConformer;
>+    std::unique_ptr<PixelBufferResizer> m_pixelBufferResizer;
>+    IntSize m_presetSize;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/platform/mediastream/mac/MockRealtimeVideoSourceMac.mm b/Source/WebCore/platform/mediastream/mac/MockRealtimeVideoSourceMac.mm
>index 17b35baa157d5f446bb90397cc336151092fe8dc..613f224dade6b881884d757e4dffee9aad48970b 100644
>--- a/Source/WebCore/platform/mediastream/mac/MockRealtimeVideoSourceMac.mm
>+++ b/Source/WebCore/platform/mediastream/mac/MockRealtimeVideoSourceMac.mm
>@@ -37,6 +37,7 @@
> #import "MediaConstraints.h"
> #import "MediaSampleAVFObjC.h"
> #import "NotImplemented.h"
>+#import "PixelBufferResizer.h"
> #import "PlatformLayer.h"
> #import "RealtimeMediaSourceSettings.h"
> #import <QuartzCore/CALayer.h>
>@@ -49,6 +50,11 @@
> namespace WebCore {
> using namespace PAL;
> 
>+#if PLATFORM(MAC)
>+const OSType videoCaptureFormat = kCVPixelFormatType_420YpCbCr8Planar;
>+#else
>+const OSType videoCaptureFormat = kCVPixelFormatType_420YpCbCr8BiPlanarFullRange;
>+#endif
> static const int videoSampleRate = 90000;
> 
> CaptureSourceOrError MockRealtimeVideoSource::create(const String& deviceID, const String& name, const MediaConstraints* constraints)
>@@ -71,23 +77,18 @@ RetainPtr<CMSampleBufferRef> MockRealtimeVideoSourceMac::CMSampleBufferFromPixel
>     if (!pixelBuffer)
>         return nullptr;
>     
>-    if (!m_pixelBufferConformer)
>-        m_pixelBufferConformer = std::make_unique<PixelBufferConformerCV>((__bridge CFDictionaryRef)@{ (__bridge NSString *)kCVPixelBufferPixelFormatTypeKey: @(kCVPixelFormatType_420YpCbCr8Planar) });
>-
>-    auto convertedPixelBuffer = m_pixelBufferConformer->convert(pixelBuffer);
>-
>     CMTime sampleTime = CMTimeMake(((elapsedTime() + 100_ms) * videoSampleRate).seconds(), videoSampleRate);
>     CMSampleTimingInfo timingInfo = { kCMTimeInvalid, sampleTime, sampleTime };
> 
>     CMVideoFormatDescriptionRef formatDescription = nullptr;
>-    OSStatus status = CMVideoFormatDescriptionCreateForImageBuffer(kCFAllocatorDefault, (CVImageBufferRef)convertedPixelBuffer, &formatDescription);
>+    OSStatus status = CMVideoFormatDescriptionCreateForImageBuffer(kCFAllocatorDefault, (CVImageBufferRef)pixelBuffer, &formatDescription);
>     if (status != noErr) {
>         LOG_ERROR("Failed to initialize CMVideoFormatDescription with error code: %d", status);
>         return nullptr;
>     }
> 
>     CMSampleBufferRef sampleBuffer;
>-    status = CMSampleBufferCreateReadyWithImageBuffer(kCFAllocatorDefault, (CVImageBufferRef)convertedPixelBuffer, formatDescription, &timingInfo, &sampleBuffer);
>+    status = CMSampleBufferCreateReadyWithImageBuffer(kCFAllocatorDefault, (CVImageBufferRef)pixelBuffer, formatDescription, &timingInfo, &sampleBuffer);
>     CFRelease(formatDescription);
>     if (status != noErr) {
>         LOG_ERROR("Failed to initialize CMSampleBuffer with error code: %d", status);
>@@ -148,6 +149,17 @@ void MockRealtimeVideoSourceMac::updateSampleBuffer()
>         return;
> 
>     auto pixelBuffer = pixelBufferFromCGImage(imageBuffer->copyImage()->nativeImage().get());
>+    if (m_pixelBufferResizer)
>+        pixelBuffer = m_pixelBufferResizer->resize(pixelBuffer.get());
>+    else {
>+        if (!m_pixelBufferConformer) {
>+            m_pixelBufferConformer = std::make_unique<PixelBufferConformerCV>((__bridge CFDictionaryRef)@{
>+                (__bridge NSString *)kCVPixelBufferPixelFormatTypeKey: @(videoCaptureFormat)
>+            });
>+        }
>+
>+        pixelBuffer = m_pixelBufferConformer->convert(pixelBuffer.get());
>+    }
>     auto sampleBuffer = CMSampleBufferFromPixelBuffer(pixelBuffer.get());
> 
>     // We use m_deviceOrientation to emulate sensor orientation
>@@ -188,6 +200,21 @@ void MockRealtimeVideoSourceMac::monitorOrientation(OrientationNotifier& notifie
>     orientationChanged(notifier.orientation());
> }
> 
>+void MockRealtimeVideoSourceMac::setSizeAndFrameRateWithPreset(IntSize requestedSize, double, RefPtr<VideoPreset> preset)
>+{
>+    if (!preset)
>+        return;
>+
>+    if (preset->size != requestedSize) {
>+        if (m_pixelBufferResizer && !m_pixelBufferResizer->canResizeTo(requestedSize))
>+            m_pixelBufferResizer = nullptr;
>+
>+        if (!m_pixelBufferResizer)
>+            m_pixelBufferResizer = std::make_unique<PixelBufferResizer>(requestedSize, videoCaptureFormat);
>+    } else
>+        m_pixelBufferResizer = nullptr;
>+}
>+
> } // namespace WebCore
> 
> #endif // ENABLE(MEDIA_STREAM)
>diff --git a/Source/WebCore/platform/mock/MockMediaDevice.h b/Source/WebCore/platform/mock/MockMediaDevice.h
>index 9136e632d9e21dfbda9f1314ff3271529c2b2176..9c96cbb406b0aa51b6cffb02ba0a21ecfef2edf4 100644
>--- a/Source/WebCore/platform/mock/MockMediaDevice.h
>+++ b/Source/WebCore/platform/mock/MockMediaDevice.h
>@@ -79,7 +79,7 @@ struct MockCameraProperties {
>         if (!facingMode)
>             return std::nullopt;
> 
>-        std::optional<Vector<VideoPreset>> presets;
>+        std::optional<Vector<VideoPresetData>> presets;
>         decoder >> presets;
>         if (!presets)
>             return std::nullopt;
>@@ -94,7 +94,7 @@ struct MockCameraProperties {
> 
>     double defaultFrameRate { 30 };
>     RealtimeMediaSourceSettings::VideoFacingMode facingMode { RealtimeMediaSourceSettings::VideoFacingMode::User };
>-    Vector<VideoPreset> presets { { { 640, 480 }, { { 30, 30}, { 15, 15 } } } };
>+    Vector<VideoPresetData> presets { { { 640, 480 }, { { 30, 30}, { 15, 15 } } } };
>     Color fillColor { Color::black };
> };
> 
>diff --git a/Source/WebCore/platform/mock/MockRealtimeAudioSource.cpp b/Source/WebCore/platform/mock/MockRealtimeAudioSource.cpp
>index 965727082cb323989596b81ac6a13a6d910f1095..2e8e55cf6460bc23d12fab8bbbd626442de05ad5 100644
>--- a/Source/WebCore/platform/mock/MockRealtimeAudioSource.cpp
>+++ b/Source/WebCore/platform/mock/MockRealtimeAudioSource.cpp
>@@ -98,7 +98,7 @@ MockRealtimeAudioSource::~MockRealtimeAudioSource()
> #endif
> }
> 
>-const RealtimeMediaSourceSettings& MockRealtimeAudioSource::settings() const
>+const RealtimeMediaSourceSettings& MockRealtimeAudioSource::settings()
> {
>     if (!m_currentSettings) {
>         RealtimeMediaSourceSettings settings;
>@@ -119,7 +119,7 @@ const RealtimeMediaSourceSettings& MockRealtimeAudioSource::settings() const
>     return m_currentSettings.value();
> }
> 
>-const RealtimeMediaSourceCapabilities& MockRealtimeAudioSource::capabilities() const
>+const RealtimeMediaSourceCapabilities& MockRealtimeAudioSource::capabilities()
> {
>     if (!m_capabilities) {
>         RealtimeMediaSourceCapabilities capabilities(settings().supportedConstraints());
>diff --git a/Source/WebCore/platform/mock/MockRealtimeAudioSource.h b/Source/WebCore/platform/mock/MockRealtimeAudioSource.h
>index 79c6678ad0153116c7ab7177449ba6895332b2a0..ded280d7df5840fe903f340b607cbebd93928b66 100644
>--- a/Source/WebCore/platform/mock/MockRealtimeAudioSource.h
>+++ b/Source/WebCore/platform/mock/MockRealtimeAudioSource.h
>@@ -59,8 +59,8 @@ protected:
>     static Seconds renderInterval() { return 60_ms; }
> 
> private:
>-    const RealtimeMediaSourceCapabilities& capabilities() const final;
>-    const RealtimeMediaSourceSettings& settings() const final;
>+    const RealtimeMediaSourceCapabilities& capabilities() final;
>+    const RealtimeMediaSourceSettings& settings() final;
> 
>     void tick();
> 
>@@ -68,8 +68,8 @@ private:
> 
>     void delaySamples(Seconds) final;
> 
>-    mutable std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
>-    mutable std::optional<RealtimeMediaSourceSettings> m_currentSettings;
>+    std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
>+    std::optional<RealtimeMediaSourceSettings> m_currentSettings;
>     RealtimeMediaSourceSupportedConstraints m_supportedConstraints;
> 
>     RunLoop::Timer<MockRealtimeAudioSource> m_timer;
>diff --git a/Source/WebCore/platform/mock/MockRealtimeMediaSourceCenter.cpp b/Source/WebCore/platform/mock/MockRealtimeMediaSourceCenter.cpp
>index 642d3ca6c8cd33259558601596df389b4b7f5c00..ae00d0debdbca1f8a75ad9c2b792d6e42f06df39 100644
>--- a/Source/WebCore/platform/mock/MockRealtimeMediaSourceCenter.cpp
>+++ b/Source/WebCore/platform/mock/MockRealtimeMediaSourceCenter.cpp
>@@ -53,13 +53,8 @@ static inline Vector<MockMediaDevice> defaultDevices()
>             MockCameraProperties {
>                 30,
>                 RealtimeMediaSourceSettings::VideoFacingMode::User, {
>-                    { { 3840, 2160 }, { { 30, 30}, { 27.5, 27.5}, { 25, 25}, { 22.5, 22.5}, { 20, 20}, { 17.5, 17.5}, { 15, 15}, { 12.5, 12.5}, { 10, 10}, { 7.5, 7.5}, { 5, 5} } },
>-                    { { 1920, 1080 }, { { 30, 30}, { 27.5, 27.5}, { 25, 25}, { 22.5, 22.5}, { 20, 20}, { 17.5, 17.5}, { 15, 15}, { 12.5, 12.5}, { 10, 10}, { 7.5, 7.5}, { 5, 5} } },
>                     { { 1280, 720 }, { { 30, 30}, { 27.5, 27.5}, { 25, 25}, { 22.5, 22.5}, { 20, 20}, { 17.5, 17.5}, { 15, 15}, { 12.5, 12.5}, { 10, 10}, { 7.5, 7.5}, { 5, 5} } },
>-                    { { 960, 540 }, { { 30, 30}, { 27.5, 27.5}, { 25, 25}, { 22.5, 22.5}, { 20, 20}, { 17.5, 17.5}, { 15, 15}, { 12.5, 12.5}, { 10, 10}, { 7.5, 7.5}, { 5, 5} } },
>-                    { { 640, 480 }, { { 30, 30}, { 27.5, 27.5}, { 25, 25}, { 22.5, 22.5}, { 20, 20}, { 17.5, 17.5}, { 15, 15}, { 12.5, 12.5}, { 10, 10}, { 7.5, 7.5}, { 5, 5} } },
>-                    { { 352, 288 }, { { 30, 30}, { 27.5, 27.5}, { 25, 25}, { 22.5, 22.5}, { 20, 20}, { 17.5, 17.5}, { 15, 15}, { 12.5, 12.5}, { 10, 10}, { 7.5, 7.5}, { 5, 5} } },
>-                    { { 320, 240 }, { { 30, 30}, { 27.5, 27.5}, { 25, 25}, { 22.5, 22.5}, { 20, 20}, { 17.5, 17.5}, { 15, 15}, { 12.5, 12.5}, { 10, 10}, { 7.5, 7.5}, { 5, 5} } },
>+                    { { 640, 480 },  { { 30, 30}, { 27.5, 27.5}, { 25, 25}, { 22.5, 22.5}, { 20, 20}, { 17.5, 17.5}, { 15, 15}, { 12.5, 12.5}, { 10, 10}, { 7.5, 7.5}, { 5, 5} } },
>                 },
>                 Color::black,
>             } },
>@@ -68,12 +63,14 @@ static inline Vector<MockMediaDevice> defaultDevices()
>             MockCameraProperties {
>                 15,
>                 RealtimeMediaSourceSettings::VideoFacingMode::Environment, {
>-                    { { 1280, 720 }, { { 3, 120 } } },
>-                    { { 960, 540 }, { { 3, 60 } } },
>-                    { { 640, 480 }, { { 2, 30 } } },
>-                    { { 352, 288 }, { { 2, 30 } } },
>-                    { { 320, 240 }, { { 2, 30 } } },
>-                    { { 160, 120 }, { { 2, 30 } } },
>+                    { { 3840, 2160 }, { { 2, 30 } } },
>+                    { { 1920, 1080 }, { { 2, 30 } } },
>+                    { { 1280, 720 },  { { 3, 120 } } },
>+                    { { 960, 540 },   { { 3, 60 } } },
>+                    { { 640, 480 },   { { 2, 30 } } },
>+                    { { 352, 288 },   { { 2, 30 } } },
>+                    { { 320, 240 },   { { 2, 30 } } },
>+                    { { 160, 120 },   { { 2, 30 } } },
>                 },
>                 Color::darkGray,
>             } },
>diff --git a/Source/WebCore/platform/mock/MockRealtimeVideoSource.cpp b/Source/WebCore/platform/mock/MockRealtimeVideoSource.cpp
>index 0e78d56c440d791767baad0de25c7b4f898d444f..27b53e459c06bd15a1475de1fe4fcf75a6e0d274 100644
>--- a/Source/WebCore/platform/mock/MockRealtimeVideoSource.cpp
>+++ b/Source/WebCore/platform/mock/MockRealtimeVideoSource.cpp
>@@ -131,11 +131,15 @@ MockRealtimeVideoSource::MockRealtimeVideoSource(const String& deviceID, const S
>     auto& properties = WTF::get<MockCameraProperties>(m_device.properties);
>     setFrameRate(properties.defaultFrameRate);
>     setFacingMode(properties.facingMode);
>-    setSupportedPresets(WTFMove(properties.presets));
>     m_fillColor = properties.fillColor;
> }
> 
>-const RealtimeMediaSourceCapabilities& MockRealtimeVideoSource::capabilities() const
>+void MockRealtimeVideoSource::generatePresets()
>+{
>+    setSupportedPresets(WTFMove(WTF::get<MockCameraProperties>(m_device.properties).presets));
>+}
>+
>+const RealtimeMediaSourceCapabilities& MockRealtimeVideoSource::capabilities()
> {
>     if (!m_capabilities) {
>         RealtimeMediaSourceCapabilities capabilities(settings().supportedConstraints());
>@@ -149,13 +153,13 @@ const RealtimeMediaSourceCapabilities& MockRealtimeVideoSource::capabilities() c
>             capabilities.setFrameRate(CapabilityValueOrRange(.01, 60.0));
>         }
> 
>-        addSupportedCapabilities(capabilities);
>+        updateCapabilities(capabilities);
>         m_capabilities = WTFMove(capabilities);
>     }
>     return m_capabilities.value();
> }
> 
>-const RealtimeMediaSourceSettings& MockRealtimeVideoSource::settings() const
>+const RealtimeMediaSourceSettings& MockRealtimeVideoSource::settings()
> {
>     if (m_currentSettings)
>         return m_currentSettings.value();
>@@ -168,7 +172,7 @@ const RealtimeMediaSourceSettings& MockRealtimeVideoSource::settings() const
>         settings.setLogicalSurface(true);
>     }
>     settings.setFrameRate(frameRate());
>-    IntSize size = this->size();
>+    auto& size = this->size();
>     settings.setWidth(size.width());
>     settings.setHeight(size.height());
>     if (aspectRatio())
>diff --git a/Source/WebCore/platform/mock/MockRealtimeVideoSource.h b/Source/WebCore/platform/mock/MockRealtimeVideoSource.h
>index 91f656afc1771db2f6fe6c6883f2e124007a9160..eec40965a934bbe2456be0ab6ac07121f1557160 100644
>--- a/Source/WebCore/platform/mock/MockRealtimeVideoSource.h
>+++ b/Source/WebCore/platform/mock/MockRealtimeVideoSource.h
>@@ -63,18 +63,19 @@ protected:
>     void settingsDidChange(OptionSet<RealtimeMediaSourceSettings::Flag>) override;
> 
> private:
>-    const RealtimeMediaSourceCapabilities& capabilities() const final;
>-    const RealtimeMediaSourceSettings& settings() const final;
>+    const RealtimeMediaSourceCapabilities& capabilities() final;
>+    const RealtimeMediaSourceSettings& settings() final;
> 
>     void startProducingData() final;
>     void stopProducingData() final;
>+    bool isCaptureSource() const final { return true; }
>+
>+    void generatePresets() final;
> 
>     void drawAnimation(GraphicsContext&);
>     void drawText(GraphicsContext&);
>     void drawBoxes(GraphicsContext&);
> 
>-    bool isCaptureSource() const final { return true; }
>-
>     void generateFrame();
>     void startCaptureTimer();
> 
>@@ -98,8 +99,8 @@ private:
> 
>     unsigned m_frameNumber { 0 };
>     RunLoop::Timer<MockRealtimeVideoSource> m_emitFrameTimer;
>-    mutable std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
>-    mutable std::optional<RealtimeMediaSourceSettings> m_currentSettings;
>+    std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
>+    std::optional<RealtimeMediaSourceSettings> m_currentSettings;
>     RealtimeMediaSourceSupportedConstraints m_supportedConstraints;
>     Color m_fillColor { Color::black };
>     MockMediaDevice m_device;
>diff --git a/Source/WebKit/WebProcess/cocoa/UserMediaCaptureManager.cpp b/Source/WebKit/WebProcess/cocoa/UserMediaCaptureManager.cpp
>index bc39dccf58e145c4984ba58d4c51b6c6835886a8..480bad73ec271f91faec7a50316a724ee88c5e94 100644
>--- a/Source/WebKit/WebProcess/cocoa/UserMediaCaptureManager.cpp
>+++ b/Source/WebKit/WebProcess/cocoa/UserMediaCaptureManager.cpp
>@@ -65,13 +65,15 @@ public:
>     }
> 
>     SharedRingBufferStorage& storage() { return static_cast<SharedRingBufferStorage&>(m_ringBuffer.storage()); }
>-    const RealtimeMediaSourceCapabilities& capabilities() const final {
>+
>+    const RealtimeMediaSourceCapabilities& capabilities() final
>+    {
>         if (!m_capabilities)
>             m_capabilities = m_manager.capabilities(m_id);
>         return m_capabilities.value();
>     }
> 
>-    const RealtimeMediaSourceSettings& settings() const final { return m_settings; }
>+    const RealtimeMediaSourceSettings& settings() final { return m_settings; }
>     void setSettings(RealtimeMediaSourceSettings&& settings)
>     {
>         auto changed = m_settings.difference(settings);
>diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
>index 2babe41ea7bccaf66d782bbdae6e2769bf763159..aaf782c758800653b8c08bcc56efa49a8c2162c2 100644
>--- a/LayoutTests/ChangeLog
>+++ b/LayoutTests/ChangeLog
>@@ -1,3 +1,16 @@
>+2018-09-12  Eric Carlson  <eric.carlson@apple.com>
>+
>+        Support arbitrary video resolution in getUserMedia API
>+        https://bugs.webkit.org/show_bug.cgi?id=178109
>+        <rdar://problem/35083128>
>+
>+        Reviewed by Youenn Fablet.
>+
>+        * fast/mediastream/MediaStreamTrack-getCapabilities-expected.txt:
>+        * fast/mediastream/apply-constraints-advanced-expected.txt:
>+        * fast/mediastream/apply-constraints-advanced.html:
>+        * fast/mediastream/apply-constraints-video.html:
>+
> 2018-09-14  Devin Rousso  <webkit@devinrousso.com>
> 
>         Web Inspector: Record actions performed on ImageBitmapRenderingContext
>diff --git a/LayoutTests/fast/mediastream/MediaStreamTrack-getCapabilities-expected.txt b/LayoutTests/fast/mediastream/MediaStreamTrack-getCapabilities-expected.txt
>index 431f1f01a5aa31ef4a6cd80f961c05a51e2d3984..43e9f4209feeb8a0b97078f76f33ec6b34a8640d 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: 1.222 }
>+  capabilities.aspectRatio = { max: 1.778, min: 1 }
>   capabilities.deviceId = <UUID>
>   capabilities.facingMode = [ user ]
>   capabilities.frameRate = { max: 30, min: 5 }
>-  capabilities.height = { max: 2160, min: 240 }
>-  capabilities.width = { max: 3840, min: 320 }
>+  capabilities.height = { max: 720, min: 112 }
>+  capabilities.width = { max: 1280, min: 112 }
> 
> 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 75d0bdc6634a323c3284e802b2459bc5d8222e16..4e22260fcbebf8cfbd1cdd51e018ec86f6bdb487 100644
>--- a/LayoutTests/fast/mediastream/apply-constraints-advanced-expected.txt
>+++ b/LayoutTests/fast/mediastream/apply-constraints-advanced-expected.txt
>@@ -16,9 +16,9 @@ PASS settings['height'] is 480
> PASS settings['width'] is 640
> PASS settings['height'] is 480
> 
>-** 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":{"min":640},"height":{"min":480},"advanced":[{"width":6000,"height":6000},{"width":1280,"height":720}]} - first width and height in advanced are too big, second is used.
>+PASS settings['width'] is 1280
>+PASS settings['height'] is 720
> 
> ** Constraint: {"width":320,"height":240} - reset width and height.
> PASS settings['width'] is 320
>diff --git a/LayoutTests/fast/mediastream/apply-constraints-advanced.html b/LayoutTests/fast/mediastream/apply-constraints-advanced.html
>index 922e1350ccf9a3f9ab2b834c55af81e6cca0db6b..1eab37963c5b78e9be117456ab84f62b07959f2d 100644
>--- a/LayoutTests/fast/mediastream/apply-constraints-advanced.html
>+++ b/LayoutTests/fast/mediastream/apply-constraints-advanced.html
>@@ -29,10 +29,10 @@
>                                     height: { min: 480 },
>                                     advanced: [
>                                         { width: 6000, height: 6000 },
>-                                        { width: 1920, height: 1080 },
>+                                        { width: 1280, height: 720 },
>                                     ]
>                                  },
>-                    expected: { width: 1920, height: 1080 }, 
>+                    expected: { width: 1280, height: 720 }, 
>                 },
>                 {
>                     message: "reset width and height.",
>diff --git a/LayoutTests/fast/mediastream/apply-constraints-video-expected.txt b/LayoutTests/fast/mediastream/apply-constraints-video-expected.txt
>index d890d367b6c784840d00c293b4eba5626bf6f3b4..37d3ee680269ab6ac9c67acb13fecc42679ab67d 100644
>--- a/LayoutTests/fast/mediastream/apply-constraints-video-expected.txt
>+++ b/LayoutTests/fast/mediastream/apply-constraints-video-expected.txt
>@@ -32,34 +32,34 @@ PASS settings['width'] is 320
> PASS settings['height'] is 240
> PASS settings['frameRate'] is 30
> 
>-** Constraint: {"frameRate":{"max":6}} - the 'max' constraint can't be satisfied, promise should reject and no settings should change.
>+** Constraint: {"frameRate":{"max":8}} - the 'max' constraint can't be satisfied, promise should reject and no settings should change.
> PASS Promise was rejected
> PASS error.constraint is "frameRate"
> PASS settings['frameRate'] is 30
> 
>-** Constraint: {"width":{"exact":960}} - the 'exact' constraint can be satisfied.
>-PASS settings['width'] is 960
>-PASS settings['height'] is 540
>+** Constraint: {"width":{"exact":640}} - the 'exact' constraint can be satisfied.
>+PASS settings['width'] is 640
>+PASS settings['height'] is 480
> 
> ** 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":{"min":320,"ideal":640},"height":{"min":480,"ideal":720}} - 'ideal' and 'min' constraints can be satisfied, 'ideal' should be chosen.
>+PASS settings['width'] is 640
>+PASS settings['height'] is 720
>+
> ** Constraint: {"width":5000} - ideal width is greater than track capability, should be clamped to the maximum value.
>-PASS settings['width'] is 3840
>+PASS settings['width'] is 1280
> 
>-** 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
>+** Constraint: {"width":100,"height":100,"frameRate":4} - all values are less than track capabilities, should be clamped to the minimum values.
>+PASS settings['width'] is 112
>+PASS settings['height'] is 112
> 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['width'] is 112
>+PASS settings['height'] is 112
> PASS settings['frameRate'] is 20
> 
> ** Constraint: {"facingMode":"xnvironment","height":720} - illegal facing mode value should be ignored, height should change.
>diff --git a/LayoutTests/fast/mediastream/apply-constraints-video.html b/LayoutTests/fast/mediastream/apply-constraints-video.html
>index 7765c4810598c903e2178f6bcc245cfd1cce0c12..02e112b4060b38b6e492e7eb442e18a4cea0823f 100644
>--- a/LayoutTests/fast/mediastream/apply-constraints-video.html
>+++ b/LayoutTests/fast/mediastream/apply-constraints-video.html
>@@ -30,39 +30,39 @@
>                 },
>                 {
>                     message: "the 'max' constraint can't be satisfied, promise should reject and no settings should change.",
>-                    constraint: { frameRate: {max: 6}, }, 
>+                    constraint: { frameRate: {max: 8}, }, 
>                     expected: { frameRate: 30 },
>                     error: "frameRate",
>                 },
>                 {
>                     message: "the 'exact' constraint can be satisfied.",
>-                    constraint: { width: { exact: 960 } },
>-                    expected: { width: 960, height: 540 },
>+                    constraint: { width: { exact: 640 } },
>+                    expected: { width: 640, height: 480 },
>                 },
>                 {
>                     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: 3840, height: 2160 },
>+                    expected: { width: 1280, height: 720 },
>                 },
>                 {
>                     message: "'ideal' and 'min' constraints can be satisfied, 'ideal' should be chosen.",
>-                    constraint: { width: {min: 320, ideal: 1280}, height: {min: 480, ideal: 720}, }, 
>-                    expected: { width: 1280, height: 720 },
>+                    constraint: { width: {min: 320, ideal: 640}, height: {min: 480, ideal: 720}, }, 
>+                    expected: { width: 640, height: 720 },
>                 },
>                 {
>                     message: "ideal width is greater than track capability, should be clamped to the maximum value.",
>                     constraint: { width: 5000 },
>-                    expected: { width: 3840},
>+                    expected: { width: 1280},
>                 },
>                 {
>                     message: "all values are less than track capabilities, should be clamped to the minimum values.",
>-                    constraint: { width: 160, height: 120, frameRate: 4 },
>-                    expected: { width: 320, height: 240, frameRate: 5 },
>+                    constraint: { width: 100, height: 100, frameRate: 4 },
>+                    expected: { width: 112, height: 112, frameRate: 5 },
>                 },
>                 {
>                     message: "set frame rate, width and height should remain unchanged",
>                     constraint: { frameRate: 20 }, 
>-                    expected: { width: 320, height: 240, frameRate: 20 },
>+                    expected: { width: 112, height: 112, frameRate: 20 },
>                 },
>                 {
>                     message: "illegal facing mode value should be ignored, height should change.",

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Attachments on bug 178109: 349603 | 349659 | 349669 | 349675 | 349772 | 349783