.eslintrc

@@ -15,6 +15,8 @@
     "no-underscore-dangle": "off",
     "max-len": ["error", { "code": 120 }],
     "import/extensions": "off",
-    "import/no-cycle": "off"
+    "import/no-cycle": "off",
+    "no-continue": "off",
+    "import/prefer-default-export": "off"
   }
 }

.github/workflows/pr-code-checker.yml

@@ -0,0 +1,30 @@
+name: PR Code Checker
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  lint_and_check_build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check Out Repo
+        uses: actions/checkout@v4
+
+      - name: Setup nodejs
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'yarn'
+
+      - name: Install yarn
+        run: npm install -g yarn
+
+      - name: Install dependencies
+        run: yarn
+
+      - name: Run linter
+        run: yarn lint
+
+      - name: Run builder
+        run: yarn build

.github/workflows/pr-linter.yml

@@ -0,0 +1,17 @@
+name: "Lint PR"
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - edited
+      - synchronize
+    branches: [ master ]
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: amannn/action-semantic-pull-request@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.VL_BOT_TOKEN }}

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
           persist-credentials: false
 
       - name: Use Node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: '20'
           cache: 'yarn'

README.md

@@ -51,13 +51,13 @@ By default, WebRTCIssueDetector can be created with minimum of mandatory constru
 ```typescript
 import WebRTCIssueDetector, {
   QualityLimitationsIssueDetector,
-  FramesDroppedIssueDetector,
-  FramesEncodedSentIssueDetector,
   InboundNetworkIssueDetector,
   OutboundNetworkIssueDetector,
   NetworkMediaSyncIssueDetector,
   AvailableOutgoingBitrateIssueDetector,
   UnknownVideoDecoderImplementationDetector,
+  FrozenVideoTrackDetector,
+  VideoDecoderIssueDetector,
 } from 'webrtc-issue-detector';
 
 const widWithDefaultConstructorArgs = new WebRTCIssueDetector();
@@ -67,13 +67,13 @@ const widWithDefaultConstructorArgs = new WebRTCIssueDetector();
 const widWithCustomConstructorArgs = new WebRTCIssueDetector({
   detectors: [ // you are free to change the detectors list according to your needs
     new QualityLimitationsIssueDetector(),
-    new FramesDroppedIssueDetector(),
-    new FramesEncodedSentIssueDetector(),
     new InboundNetworkIssueDetector(),
     new OutboundNetworkIssueDetector(),
     new NetworkMediaSyncIssueDetector(),
     new AvailableOutgoingBitrateIssueDetector(),
     new UnknownVideoDecoderImplementationDetector(),
+    new FrozenVideoTrackDetector(),
+    new VideoDecoderIssueDetector(),
   ],
   getStatsInterval: 10_000, // set custom stats parsing interval
   onIssues: (payload: IssueDetectorResult) => {
@@ -104,34 +104,18 @@ const exampleIssue = {
 }
 ```
 
-### FramesDroppedIssueDetector
+### VideoDecoderIssueDetector
 Detects issues with decoder.
 ```js
 const exampleIssue = {
     type: 'cpu',
     reason: 'decoder-cpu-throttling',
     statsSample: {
-      deltaFramesDropped: 100,
-      deltaFramesReceived: 1000,
-      deltaFramesDecoded: 900,
-      framesDroppedPct: 10,
+      affectedStreamsPercent: 67,
+      throtthedStreams: [
+        { ssrc: 123, allDecodeTimePerFrame: [1.2, 1.6, 1.9, 2.4, 2.9], volatility: 1.7 },
+      ]
     },
-    ssrc: 1234,
-}
-```
-
-### FramesEncodedSentIssueDetector
-Detects issues with outbound network throughput.
-```js
-const exampleIssue = {
-    type: 'network',
-    reason: 'outbound-network-throughput',
-    statsSample: {
-      deltaFramesSent: 900,
-      deltaFramesEncoded: 1000,
-      missedFramesPct: 10,
-    },
-    ssrc: 1234,
 }
 ```
 
@@ -233,6 +217,23 @@ const exampleIssue = {
 }
 ```
 
+
+### MissingStreamDataDetector
+Detects issues with missing data in active inbound streams
+```ts
+const exampleIssue = {
+    type: 'stream',
+    reason: 'missing-video-stream-data' | 'missing-audio-stream-data',
+    trackIdentifier: 'some-track-id',
+    statsSample: {
+        bytesReceivedDelta: 0, // always zero if issue detected
+        bytesReceived: 2392384,
+        trackDetached: false,
+        trackEnded: false,
+    },
+}
+```
+
 ## Roadmap
 
 - [ ] Adaptive getStats() call interval based on last getStats() execution time 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "webrtc-issue-detector",
-  "version": "1.9.0",
+  "version": "1.16.3",
   "description": "WebRTC diagnostic tool that detects issues with network or user devices",
   "repository": "git@github.com:VLprojects/webrtc-issue-detector.git",
   "author": "Roman Kuzakov <roman.kuzakov@gmail.com>",

src/NetworkScoresCalculator.ts

@@ -32,6 +32,7 @@ class NetworkScoresCalculator implements INetworkScoresCalculator {
     return {
       outbound,
       inbound,
+      connectionId,
       statsSamples: {
         inboundStatsSample,
         outboundStatsSample,

src/WebRTCIssueDetector.ts

@@ -7,6 +7,7 @@ import {
   IssueDetector,
   IssuePayload,
   Logger,
+  NetworkScores,
   StatsReportItem,
   WebRTCIssueDetectorConstructorParams,
   WebRTCStatsParsed,
@@ -16,16 +17,17 @@ import PeriodicWebRTCStatsReporter from './parser/PeriodicWebRTCStatsReporter';
 import DefaultNetworkScoresCalculator from './NetworkScoresCalculator';
 import {
   AvailableOutgoingBitrateIssueDetector,
-  FramesDroppedIssueDetector,
-  FramesEncodedSentIssueDetector,
   InboundNetworkIssueDetector,
   NetworkMediaSyncIssueDetector,
   OutboundNetworkIssueDetector,
   QualityLimitationsIssueDetector,
   UnknownVideoDecoderImplementationDetector,
+  FrozenVideoTrackDetector,
+  VideoDecoderIssueDetector,
 } from './detectors';
 import { CompositeRTCStatsParser, RTCStatsParser } from './parser';
 import createLogger from './utils/logger';
+import MissingStreamDataDetector from './detectors/MissingStreamDataDetector';
 
 class WebRTCIssueDetector {
   readonly eventEmitter: WebRTCIssueEmitter;
@@ -58,13 +60,14 @@ class WebRTCIssueDetector {
 
     this.detectors = params.detectors ?? [
       new QualityLimitationsIssueDetector(),
-      new FramesDroppedIssueDetector(),
-      new FramesEncodedSentIssueDetector(),
       new InboundNetworkIssueDetector(),
       new OutboundNetworkIssueDetector(),
       new NetworkMediaSyncIssueDetector(),
       new AvailableOutgoingBitrateIssueDetector(),
       new UnknownVideoDecoderImplementationDetector(),
+      new FrozenVideoTrackDetector(),
+      new VideoDecoderIssueDetector(),
+      new MissingStreamDataDetector(),
     ];
 
     this.networkScoresCalculator = params.networkScoresCalculator ?? new DefaultNetworkScoresCalculator();
@@ -86,19 +89,23 @@ class WebRTCIssueDetector {
     }
 
     this.statsReporter.on(PeriodicWebRTCStatsReporter.STATS_REPORT_READY_EVENT, (report: StatsReportItem) => {
-      this.detectIssues({
-        data: report.stats,
-      });
-
-      this.calculateNetworkScores(report.stats);
+      const networkScores = this.calculateNetworkScores(report.stats);
+      this.detectIssues({ data: report.stats }, networkScores);
     });
 
-    this.statsReporter.on(PeriodicWebRTCStatsReporter.STATS_REPORTS_PARSED, (data: { timeTaken: number }) => {
+    this.statsReporter.on(PeriodicWebRTCStatsReporter.STATS_REPORTS_PARSED, (data: {
+      timeTaken: number,
+      reportItems: StatsReportItem[],
+    }) => {
       const payload = {
         timeTaken: data.timeTaken,
         ts: Date.now(),
       };
 
+      if (params.onStats) {
+        params.onStats(data.reportItems);
+      }
+
       this.eventEmitter.emit(EventType.StatsParsingFinished, payload);
     });
   }
@@ -131,7 +138,7 @@ class WebRTCIssueDetector {
     this.statsReporter.stopReporting();
   }
 
-  public handleNewPeerConnection(pc: RTCPeerConnection): void {
+  public handleNewPeerConnection(pc: RTCPeerConnection, id?: string): void {
     if (!this.#running && this.autoAddPeerConnections) {
       this.logger.debug('Skip handling new peer connection. Detector is not running', pc);
       return;
@@ -145,23 +152,26 @@ class WebRTCIssueDetector {
 
     this.logger.debug('Handling new peer connection', pc);
 
-    this.compositeStatsParser.addPeerConnection({ pc });
+    this.compositeStatsParser.addPeerConnection({ pc, id });
   }
 
   private emitIssues(issues: IssuePayload[]): void {
     this.eventEmitter.emit(EventType.Issue, issues);
   }
 
-  private detectIssues({ data }: DetectIssuesPayload): void {
-    const issues = this.detectors.reduce<IssuePayload[]>((acc, detector) => [...acc, ...detector.detect(data)], []);
+  private detectIssues({ data }: DetectIssuesPayload, networkScores: NetworkScores): void {
+    const issues = this.detectors
+      .reduce<IssuePayload[]>((acc, detector) => [...acc, ...detector.detect(data, networkScores)], []);
+
     if (issues.length > 0) {
       this.emitIssues(issues);
     }
   }
 
-  private calculateNetworkScores(data: WebRTCStatsParsed): void {
+  private calculateNetworkScores(data: WebRTCStatsParsed): NetworkScores {
     const networkScores = this.networkScoresCalculator.calculate(data);
     this.eventEmitter.emit(EventType.NetworkScoresUpdated, networkScores);
+    return networkScores;
   }
 
   private wrapRTCPeerConnection(): void {

src/detectors/BaseIssueDetector.ts

@@ -1,6 +1,12 @@
-import { IssueDetector, IssueDetectorResult, WebRTCStatsParsed } from '../types';
+import {
+  IssueDetector,
+  IssueDetectorResult,
+  NetworkScores,
+  WebRTCStatsParsed,
+  WebRTCStatsParsedWithNetworkScores,
+} from '../types';
 import { scheduleTask } from '../utils/tasks';
-import { CLEANUP_PREV_STATS_TTL_MS } from '../utils/constants';
+import { CLEANUP_PREV_STATS_TTL_MS, MAX_PARSED_STATS_STORAGE_SIZE } from '../utils/constants';
 
 export interface PrevStatsCleanupPayload {
   connectionId: string;
@@ -9,23 +15,34 @@ export interface PrevStatsCleanupPayload {
 
 export interface BaseIssueDetectorParams {
   statsCleanupTtlMs?: number;
+  maxParsedStatsStorageSize?: number;
 }
 
 abstract class BaseIssueDetector implements IssueDetector {
-  readonly #lastProcessedStats: Map<string, WebRTCStatsParsed | undefined>;
+  readonly #parsedStatsStorage: Map<string, WebRTCStatsParsedWithNetworkScores[]> = new Map();
 
   readonly #statsCleanupDelayMs: number;
 
+  readonly #maxParsedStatsStorageSize: number;
+
   constructor(params: BaseIssueDetectorParams = {}) {
-    this.#lastProcessedStats = new Map();
     this.#statsCleanupDelayMs = params.statsCleanupTtlMs ?? CLEANUP_PREV_STATS_TTL_MS;
+    this.#maxParsedStatsStorageSize = params.maxParsedStatsStorageSize ?? MAX_PARSED_STATS_STORAGE_SIZE;
   }
 
-  abstract performDetection(data: WebRTCStatsParsed): IssueDetectorResult;
+  abstract performDetection(data: WebRTCStatsParsedWithNetworkScores): IssueDetectorResult;
 
-  detect(data: WebRTCStatsParsed): IssueDetectorResult {
-    const result = this.performDetection(data);
+  detect(data: WebRTCStatsParsed, networkScores?: NetworkScores): IssueDetectorResult {
+    const parsedStatsWithNetworkScores = {
+      ...data,
+      networkScores: {
+        ...networkScores,
+        statsSamples: networkScores?.statsSamples || {},
+      },
+    };
+    const result = this.performDetection(parsedStatsWithNetworkScores);
 
+    this.setLastProcessedStats(data.connection.id, parsedStatsWithNetworkScores);
     this.performPrevStatsCleanup({
       connectionId: data.connection.id,
     });
@@ -36,7 +53,7 @@ abstract class BaseIssueDetector implements IssueDetector {
   protected performPrevStatsCleanup(payload: PrevStatsCleanupPayload): void {
     const { connectionId, cleanupCallback } = payload;
 
-    if (!this.#lastProcessedStats.has(connectionId)) {
+    if (!this.#parsedStatsStorage.has(connectionId)) {
       return;
     }
 
@@ -53,16 +70,32 @@ abstract class BaseIssueDetector implements IssueDetector {
     });
   }
 
-  protected setLastProcessedStats(connectionId: string, parsedStats: WebRTCStatsParsed): void {
-    this.#lastProcessedStats.set(connectionId, parsedStats);
+  protected setLastProcessedStats(connectionId: string, parsedStats: WebRTCStatsParsedWithNetworkScores): void {
+    if (!connectionId || parsedStats.connection.id !== connectionId) {
+      return;
+    }
+
+    const connectionStats = this.#parsedStatsStorage.get(connectionId) ?? [];
+    connectionStats.push(parsedStats);
+
+    if (connectionStats.length > this.#maxParsedStatsStorageSize) {
+      connectionStats.shift();
+    }
+
+    this.#parsedStatsStorage.set(connectionId, connectionStats);
+  }
+
+  protected getLastProcessedStats(connectionId: string): WebRTCStatsParsedWithNetworkScores | undefined {
+    const connectionStats = this.#parsedStatsStorage.get(connectionId);
+    return connectionStats?.[connectionStats.length - 1];
   }
 
-  protected getLastProcessedStats(connectionId: string): WebRTCStatsParsed | undefined {
-    return this.#lastProcessedStats.get(connectionId);
+  protected getAllLastProcessedStats(connectionId: string): WebRTCStatsParsedWithNetworkScores[] {
+    return this.#parsedStatsStorage.get(connectionId) ?? [];
   }
 
-  private deleteLastProcessedStats(connectionId: string): void {
-    this.#lastProcessedStats.delete(connectionId);
+  protected deleteLastProcessedStats(connectionId: string): void {
+    this.#parsedStatsStorage.delete(connectionId);
   }
 }