Optionaladd(Optional) Add VideoDownlinkObserver to observer resubscribe requests
Optionalbind(Optional) Bind the video tile controller to the policy to allow it to control the video tiles such as pause and unpause. The audio video controller should call this method to pass down a transceiver controller to the policy when the meeting starts and set it to undefined when the meeting ends.
the video tile controller
Updates the internal state with the set of streams we expect to be subscribed to, and return the set. This value will be truncated to the maximum subscription limit of the call.
When a policy is passed into a meeting session, this will be called once every second to check if the subscriptions have changed.
Optionalfor(Optional) Call and observer function on all added VideoDownlinkObserver. Can be used to notify observers
of video tile pauses.
OptionalgetAdditional server side features to be enabled for network adaption. Policy implementations
must abide by the restrictions in the returned ServerSideNetworkAdaption enum value.
OptionalgetUsed in combination of getServerSideNetworkAdaption and wantsResubscribe
to indicate any added, updated, or removed video preferences.
OptionalremoveReset back to initial state
OptionalsetDynamically switch any client behavior to the adaption type which this policy indicated support
to from supportedServerSideNetworkAdaptions.
Optionalset(Optional) Add observer that allows policy to immediately request an update based off current choices. Only one observer can be set at a time.
OptionalsupportedValues which this policy supports being overriden to. The server may use this to transition
clients to different values of ServerSideNetworkAdaption. Override this function
to return an empty list to disable any server override attempts.
Potentially update the desired set of video streams to receive based on the given [[VideoStreamIndex]].
OptionalwantsUsed to indicate that this policy can handle the increased complexity required to deal with layers of different frame rates (i.e. balances tradeoffs of resolution vs. frame rate, will not degrade resolution or framerate during recovery, etc.)
Returns true if the policy has decided that a change to subscribed set of video streams to receive would be beneficial.
[[VideoDownlinkBandwidthPolicy]] makes decisions about downlink video bandwidth usage.