export function useMediaStreamMetrics()

in src/hooks/sdk/useMediaStreamMetrics.tsx [25:85]
54 lines of code
2 McCabe index (conditional complexity)

export function useMediaStreamMetrics(): MediaStreamMetrics {
  const audioVideo = useAudioVideo();
  const [mediaStreamMetrics, setMediaStreamMetrics] =
    useState<MediaStreamMetrics>({
      audioPacketsSentFractionLossPercent: null,
      audioPacketsReceivedFractionLossPercent: null,
      audioSpeakerDelayMs: null,
      audioUpstreamRoundTripTimeMs: null,
      audioUpstreamJitterMs: null,
      audioDownstreamJitterMs: null,
      currentRoundTripTimeMs: null,
      availableOutgoingBandwidth: null,
      availableIncomingBandwidth: null,
      rtcStatsReport: null,
      videoStreamMetrics: {},
    });

  useEffect(() => {
    if (!audioVideo) {
      return;
    }

    const observer = {
      metricsDidReceive(clientMetricReport: ClientMetricReport): void {
        const {
          audioPacketLossPercent,
          audioPacketsReceivedFractionLoss,
          audioSpeakerDelayMs,
          audioUpstreamRoundTripTimeMs,
          audioUpstreamJitterMs,
          audioDownstreamJitterMs,
          currentRoundTripTimeMs,
          availableOutgoingBitrate,
          availableIncomingBitrate,
        } = clientMetricReport.getObservableMetrics();

        // Return 0 if the metric value is NaN, otherwise return its integer part.
        setMediaStreamMetrics({
          audioPacketsSentFractionLossPercent: audioPacketLossPercent | 0,
          audioPacketsReceivedFractionLossPercent:
            audioPacketsReceivedFractionLoss | 0,
          audioSpeakerDelayMs: audioSpeakerDelayMs | 0,
          audioUpstreamRoundTripTimeMs: audioUpstreamRoundTripTimeMs | 0,
          audioUpstreamJitterMs: audioUpstreamJitterMs | 0,
          audioDownstreamJitterMs: audioDownstreamJitterMs | 0,
          currentRoundTripTimeMs: currentRoundTripTimeMs | 0,
          availableOutgoingBandwidth: (availableOutgoingBitrate / 1000) | 0,
          availableIncomingBandwidth: (availableIncomingBitrate / 1000) | 0,
          rtcStatsReport: clientMetricReport.getRTCStatsReport(),
          videoStreamMetrics: clientMetricReport.getObservableVideoMetrics(),
        });
      },
    };

    audioVideo.addObserver(observer);

    return () => audioVideo.removeObserver(observer);
  }, [audioVideo]);

  return mediaStreamMetrics;
}