fix: added MOS quality threshold as a detector param

Author: desher

src/detectors/FrozenVideoTrackDetector.ts

@@ -12,6 +12,7 @@ import BaseIssueDetector from './BaseIssueDetector';
 interface FrozenVideoTrackDetectorParams {
   avgFreezeDurationThresholdMs?: number;
   frozenDurationThresholdPct?: number;
+  minMosQuality?: number;
 }
 
 interface FrozenStreamStatsSample {
@@ -25,15 +26,18 @@ class FrozenVideoTrackDetector extends BaseIssueDetector {
 
   readonly #frozenDurationThresholdPct: number;
 
+  readonly #minMosQuality: MosQuality;
+
   constructor(params: FrozenVideoTrackDetectorParams = {}) {
     super();
     this.#avgFreezeDurationThresholdMs = params.avgFreezeDurationThresholdMs ?? 1_000;
     this.#frozenDurationThresholdPct = params.frozenDurationThresholdPct ?? 30;
+    this.#minMosQuality = params.minMosQuality ?? MosQuality.BAD;
   }
 
   performDetection(data: WebRTCStatsParsedWithNetworkScores): IssueDetectorResult {
     const inboundScore = data.networkScores.inbound;
-    if (inboundScore !== undefined && inboundScore <= MosQuality.BAD) {
+    if (inboundScore !== undefined && inboundScore <= this.#minMosQuality) {
       // do not execute detection on stats based on poor network quality
       // to avoid false positives
       return [];

src/detectors/VideoDecoderIssueDetector.ts

@@ -12,17 +12,21 @@ import BaseIssueDetector, { BaseIssueDetectorParams } from './BaseIssueDetector'
 interface VideoDecoderIssueDetectorParams extends BaseIssueDetectorParams {
   volatilityThreshold?: number;
   affectedStreamsPercentThreshold?: number;
+  minMosQuality?: number;
 }
 
 class VideoDecoderIssueDetector extends BaseIssueDetector {
   readonly #volatilityThreshold: number;
 
   readonly #affectedStreamsPercentThreshold: number;
 
+  readonly #minMosQuality: MosQuality;
+
   constructor(params: VideoDecoderIssueDetectorParams = {}) {
     super(params);
     this.#volatilityThreshold = params.volatilityThreshold ?? 8;
     this.#affectedStreamsPercentThreshold = params.affectedStreamsPercentThreshold ?? 30;
+    this.#minMosQuality = params.minMosQuality ?? MosQuality.BAD;
   }
 
   performDetection(data: WebRTCStatsParsedWithNetworkScores): IssueDetectorResult {
@@ -32,7 +36,7 @@ class VideoDecoderIssueDetector extends BaseIssueDetector {
     ];
 
     const isBadNetworkHappened = allHistoricalStats
-      .find((stat) => stat.networkScores.inbound !== undefined && stat.networkScores.inbound <= MosQuality.BAD);
+      .find((stat) => stat.networkScores.inbound !== undefined && stat.networkScores.inbound <= this.#minMosQuality);
 
     if (isBadNetworkHappened) {
       // do not execute detection on historical stats based on bad network quality