Static ReadonlycontentSVCCodecStatic ReadonlyencodingStatic ReadonlytargetStatic ReadonlyvideoSVCCodecUpdate the internal state with the capture and encode parameters we expect to be used, and return the parameters.
Returns the selected encoding parameter
This function is deprecated and unused, and will be removed in a future release.
Called when the policy wants to adjust the scalability mode for the video stream.
true if there is alternative scalability mode to degrade to, false otherwise.
Gets the maximum encoding bitrate kbps after bandwidth constraints are applied.
Reset back to initial state
Sets whether video uplink bandwidth is currently prioritized.
Set if high resultion feature (i.e., 1080p for camera and 4k for content) is enabled.
Sets ideal maximum bandwidth kbps.
Called when the intersection of the client's video codec send preferences and the meeting's video codec receive preferences is updated.
The original preferences to use as a fallback when the intersection is empty.
Set whether to enable scalable video coding (SVC)
Set a reference to the current transceiver controller. 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. If a meeting is stopped and started repeatedly, this pair of calls will be repeated to match. All calls to updateTransceiverController will occur between this pair of calls. This method should not throw.
The transceiver controller
Potentially update the optimal capture and encode parameters based on the given VideoStreamIndex.
Update the transceiver controller that is set from setTransceiverController such as setEncodingParameters. Only used when unified plan is enabled but not available for simulcast for now. This method should be called when the policy needs to update the local video encoding parameters such as after setHasBandwidthPriority has been called. The default audio video controller calls this after a video is on/off or when an active speakers changes. This method should not throw.
Return true if the policy has decided that a change to the captured and transmitted video stream would be beneficial.
Dependency descriptors can be used by the backend to designate spatial or temporal layers on a single encoding. Along with the video layers allocation exension this will result in the ability for remote attendees to subscribe to individual layers below the top.
If the send transceiver is in a state where the layers allocation extension is not matching up with the dependency descriptor extension, or we simply don't want to allow for the seperation of spatial or temporal layers, we can remove the dependency descriptor from the SDP.
NScaleVideoUplinkBandwidthPolicy implements capture and encode parameters that are nearly equivalent to those chosen by the traditional native clients, except for a modification to maxBandwidthKbps and scaleResolutionDownBy described below.