Subscribed quality updates are not ignored when dynacast is disabled

[silviudeac]

Describe the bug On iOS clients subscribed quality updates are not ignored when dynacast is set to false which causes updates to outgoing video as a reaction to these events. This feature is handled correctly according to spec in both Android and JavaScript LiveKit clients by ignoring the updates and not performing any changes to outbound video.

SDK Version 2.0.7 added using SPM

iOS/macOS Version iOS 17.5.1, iOS 16.3

Steps to Reproduce

• run iOS LiveKitExample, disable dynacast and connect to any room with video
• run the web client sample client-sdk-js and connect to the same room
• from web client change the PreferredQuality setting and notice that this causes updates in the iOS client (see attached logs)

Expected behavior I expected subscribe quality updates to be ignored when dynacast is disabled. This is the behaviour on both Android and JavaScript clients, but on iOS this flag RoomOptions.dynacast is ignored in the handler for subscribed quality changes. See correct behaviour on JavaScript and Android:

• https://github.com/livekit/client-sdk-js/blob/d8ac93b85755b87ff04fee037ad4003d974cc688/src/room/participant/LocalParticipant.ts#L1310-L1311
• https://github.com/livekit/client-sdk-android/blob/main/livekit-android-sdk/src/main/java/io/livekit/android/room/participant/LocalParticipant.kt#L705

Screenshots no screenshots

Logs Debug LiveKitSDK : [LiveKit] Room.signalClient(_:didUpdateSubscribedCodecs:qualities:forTrackSid:) [Publish/Backup] Qualities: SubscribedQuality(quality: low, enabled: true), SubscribedQuality(quality: medium, enabled: false), SubscribedQuality(quality: high, enabled: false), Codecs: SubscribedCodec(codec: h264, qualities: SubscribedQuality(quality: low, enabled: true), SubscribedQuality(quality: medium, enabled: false), SubscribedQuality(quality: high, enabled: false)

[hiroshihorie]

Thanks for the report, will patch this.

[hiroshihorie]

This should be fixed in v2.0.10, thanks for reporting !