Integrate E2EE Manager

[hiroshihorie]

• Current E2EE manager holds strong reference to RemoteParticipants, try to solve this since it causes issues.
• Add frame cryptors to simulcast senders also.

New design:

• Internal E2EEManager class is removed and Track holds FrameCryptors instead.
• RtpSender/Receivers are in pair with FrameCryptors.
• Doesn't break current release.

• [x] isEnabled property
• [x] Delegate

[lukasIO]

I like the idea behind this! How would the new design allow for encryption to be enabled/disabled ?

[hiroshihorie]

I haven't ported that from E2EE manager yet, also the delegate.

[hiroshihorie]

Build with this changes have been uploaded to tesflight.

[lukasIO]

more of a general question, would it make sense to un-set the cryptors also when tracks have ended ? Basically just thinking about how this would get cleaned up properly

[hiroshihorie]

A good point regarding cleaning up the cryptors and other properties of the track. Currently sender/receivers and cryptors will be reset if track is re-published.

I'll check how FrameCryptor retains reference to keyprovider etc. But looks like there are no memory leaks when the Room is closed.

While publishing video / mic:

After room is closed:

[lukasIO]

Nice, thanks for checking! Is the same true for unpublishing a single track instead of disconnecting the room? Thinking about cases where users publish/unpublish tracks often.

[hiroshihorie]

Thanks, might need to re-structure/design this.