UserMediaCaptureManagerProxy should allow reusing any camera source of the same page

[youennf]

95440b3

UserMediaCaptureManagerProxy should allow reusing any camera source of the same page
https://bugs.webkit.org/show_bug.cgi?id=241548
rdar://problem/95091899

Patch by Youenn Fablet <youennf@gmail.com > on 2022-06-14
Reviewed by Eric Carlson.

We are trying to reuse an existing camera source but we were only storing one camera source.
This does not work well in case the camera source gets cloned and then ended.
What we need to do is store all sources and if one is reusable, use it.

We use a WeakHashSet to store all camera sources (through getUserMedia or clone)
and iterate on them to either reuse and if not possible stop them.

This also ensures that a page does not have two live AVVideoCaptureSource sources.
If we had that, one source would interrupt the other and vice versa.

Fix a bug in which a cloned track would not have its PageIdentifier.

* Source/WebKit/UIProcess/Cocoa/UserMediaCaptureManagerProxy.cpp:
(WebKit::UserMediaCaptureManagerProxy::createCameraSource):
(WebKit::UserMediaCaptureManagerProxy::clone):
* Source/WebKit/UIProcess/Cocoa/UserMediaCaptureManagerProxy.h:
* Source/WebKit/UIProcess/Cocoa/UserMediaCaptureManagerProxy.messages.in:
* Source/WebKit/WebProcess/cocoa/RemoteRealtimeMediaSourceProxy.cpp:
(WebKit::RemoteRealtimeMediaSourceProxy::createRemoteCloneSource):
* Source/WebKit/WebProcess/cocoa/RemoteRealtimeMediaSourceProxy.h:
* Source/WebKit/WebProcess/cocoa/RemoteRealtimeVideoSource.cpp:
(WebKit::RemoteRealtimeVideoSource::clone):

Canonical link: https://commits.webkit.org/251529@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@295524 268f45cc-cd09-0410-ab3c-d52691b4dbfc

[webkit-early-warning-system]

Committed r295524 (251529@main): https://commits.webkit.org/251529@main

Reviewed commits have been landed. Closing PR #1471 and removing active labels.