[Cocoa] Add a GPU process capture preview for WebKit's capture permission prompt - #78214

934320c

[Cocoa] Add a GPU process capture preview for WebKit's capture permission prompt
https://bugs.webkit.org/show_bug.cgi?id=328783
rdar://190909434

Reviewed by NOBODY (OOPS!).

Working toward adding a live camera preview and a microphone level meter to WebKit's
getUserMedia permission prompt, so the user will be able see what they are about to
share. This patch adds the GPU process code necessary for to be able to capture audio
and/or video without an associated web process. The prompt itself will follow in a later
change.

- CapturePreviewManager captures from the chosen camera and microphone, hosts the camera frames in a
  layer the UI process can show, and reports the microphone level to the UI process.
- GPUProcess::startCapturePreview and stopCapturePreview run one preview at a time. A preview sets the
  process-wide capture attribution, TCC identity and media environment for its page, so stopping it
  restores them to whichever page was capturing before.
- GPUProcessProxy sends the camera, microphone and tccd sandbox extensions a preview needs. Unlike a
  granted capture's, they are revocable and are revoked when the preview stops.
- RemoteAudioSessionProxyManager counts a running preview as recording, so the audio session has the
  record category before the capture unit starts.
- Orientation monitoring counts capture and preview starts separately, and the start and stop messages
  say which with a RotationMonitoringReason. A preview stopping must not stop monitoring a camera that a
  capture still uses, and the reverse.

* Source/WebCore/platform/mediastream/ios/AVAudioSessionCaptureDeviceManager.h: Export
setPreferredMicrophoneID.
* Source/WebKit/CMakeLists.txt:
* Source/WebKit/DerivedSources.make:
* Source/WebKit/GPUProcess/GPUConnectionToWebProcess.cpp:
(WebKit::GPUConnectionToWebProcess::reapplyCaptureEnvironment):
(WebKit::GPUConnectionToWebProcess::startMonitoringCaptureDeviceRotation):
(WebKit::GPUConnectionToWebProcess::stopMonitoringCaptureDeviceRotation):
* Source/WebKit/GPUProcess/GPUConnectionToWebProcess.h:
* Source/WebKit/GPUProcess/GPUProcess.cpp:
(WebKit::GPUProcess::startCapturePreview):
(WebKit::GPUProcess::stopCapturePreview):
(WebKit::GPUProcess::stopCapturePreviewManager):
(WebKit::GPUProcess::didApplyCaptureEnvironment):
* Source/WebKit/GPUProcess/GPUProcess.h:
* Source/WebKit/GPUProcess/GPUProcess.messages.in:
* Source/WebKit/GPUProcess/cocoa/GPUConnectionToWebProcessCocoa.mm:
(WebKit::GPUConnectionToWebProcess::setCaptureAttributionString):
(WebKit::GPUConnectionToWebProcess::setTCCIdentity):
* Source/WebKit/GPUProcess/cocoa/GPUProcessCocoa.mm:
(WebKit::GPUProcess::setCaptureTCCIdentity):
* Source/WebKit/GPUProcess/media/RemoteAudioSessionProxyManager.cpp:
(WebKit::RemoteAudioSessionProxyManager::hasActiveProxy):
(WebKit::RemoteAudioSessionProxyManager::beginCapturePreview):
(WebKit::RemoteAudioSessionProxyManager::endCapturePreview):
(WebKit::RemoteAudioSessionProxyManager::updateCategory):
(WebKit::RemoteAudioSessionProxyManager::tryToSetActiveForProcess):
* Source/WebKit/GPUProcess/media/RemoteAudioSessionProxyManager.h:
* Source/WebKit/GPUProcess/webrtc/CapturePreviewManager.h: Added.
* Source/WebKit/GPUProcess/webrtc/CapturePreviewManager.mm: Added.
* Source/WebKit/GPUProcess/webrtc/RemoteSampleBufferDisplayLayer.mm: Import Logging.h, which an
earlier file in its unified source bundle used to provide.
* Source/WebKit/GPUProcess/webrtc/UserMediaCaptureManagerProxy.cpp:
(WebKit::UserMediaCaptureManagerProxy::startProducingData):
(WebKit::UserMediaCaptureManagerProxy::applyCaptureEnvironment):
(WebKit::UserMediaCaptureManagerProxy::reapplyCaptureEnvironment):
* Source/WebKit/GPUProcess/webrtc/UserMediaCaptureManagerProxy.h:
* Source/WebKit/Shared/RotationMonitoringReason.h: Added.
* Source/WebKit/Shared/RotationMonitoringReason.serialization.in: Added.
* Source/WebKit/SourcesCocoa.txt:
* Source/WebKit/UIProcess/Cocoa/UserMediaPermissionRequestManagerProxy.mm:
(-[WKRotationCoordinatorObserver start:layer:reason:]):
(-[WKRotationCoordinatorObserver stop:reason:]):
(-[WKRotationCoordinatorObserver stopAllForCapturePreview]):
(WebKit::UserMediaPermissionRequestManagerProxy::startMonitoringCaptureDeviceRotation):
(WebKit::UserMediaPermissionRequestManagerProxy::stopMonitoringCaptureDeviceRotation):
(WebKit::UserMediaPermissionRequestManagerProxy::stopMonitoringCaptureDeviceRotationForCapturePreview):
* Source/WebKit/UIProcess/GPU/GPUProcessProxy.cpp:
(WebKit::GPUProcessProxy::startMonitoringCaptureDeviceRotation):
(WebKit::GPUProcessProxy::stopMonitoringCaptureDeviceRotation):
(WebKit::GPUProcessProxy::startCapturePreview):
(WebKit::GPUProcessProxy::capturePreviewAudioLevelChanged):
(WebKit::GPUProcessProxy::stopCapturePreview):
* Source/WebKit/UIProcess/GPU/GPUProcessProxy.h:
(WebKit::GPUProcessProxy::setCapturePreviewAudioLevelHandler):
* Source/WebKit/UIProcess/GPU/GPUProcessProxy.messages.in:
* Source/WebKit/UIProcess/UserMediaPermissionRequestManagerProxy.h:
* Source/WebKit/UIProcess/WebPageProxy.cpp:
(WebKit::WebPageProxy::startMonitoringCaptureDeviceRotation):
(WebKit::WebPageProxy::stopMonitoringCaptureDeviceRotation):
(WebKit::WebPageProxy::stopMonitoringCaptureDeviceRotationForCapturePreview):
* Source/WebKit/UIProcess/WebPageProxy.h:
* Source/WebKit/WebKit.xcodeproj/project.pbxproj:

c6a0807

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows	Apple Internal
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win	⏳ 🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-cmake-debug	✅ 🧪 wpe-wk2	✅ 🧪 win-tests	⏳ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe		⏳ 🛠 vision-apple
	✅ 🧪 ios-wk2-wpt	🧪 api-mac-cmake-debug	⏳ 🧪 jsc-wpe
	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🛠 gtk3-gcc
	✅ 🛠 ios-safer-cpp	✅ 🧪 mac-cmake-debug-wk2	✅ 🛠 gtk
	✅ 🛠 vision	⏳ 🧪 mac-wk2-stress	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	⏳ 🧪 mac-intel-wk2	✅ 🧪 api-gtk
	✅ 🧪 vision-wk2	✅ 🛠 mac-safer-cpp	✅ 🛠 playstation
	✅ 🛠 tv	✅ 🧪 mac-site-isolation
	✅ 🛠 tv-sim
	✅ 🛠 watch
	✅ 🛠 watch-sim