P2P Media Loader Documentation
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    Class HlsJsP2PEngine

    Represents a Peer-to-Peer (P2P) engine for HLS (HTTP Live Streaming) to enhance media streaming efficiency. This class integrates P2P technologies into Hls.js, enabling the distribution of media segments via a peer network alongside traditional HTTP fetching. This reduces server bandwidth costs and improves scalability by sharing the load across multiple clients.

    The engine manages core functionalities such as segment fetching, segment management, peer connection management, and event handling related to the P2P and HLS processes.

    // Creating an instance of HlsJsP2PEngine with custom configuration
    const hlsP2PEngine = new HlsJsP2PEngine({
      core: {
        highDemandTimeWindow: 30, // 30 seconds
        simultaneousHttpDownloads: 3,
        webRtcMaxMessageSize: 64 * 1024, // 64 KB
        p2pNotReceivingBytesTimeoutMs: 10000, // 10 seconds
        p2pInactiveLoaderDestroyTimeoutMs: 15000, // 15 seconds
        httpNotReceivingBytesTimeoutMs: 8000, // 8 seconds
        httpErrorRetries: 2,
        p2pErrorRetries: 2,
        announceTrackers: ["wss://personal.tracker.com"],
        rtcConfig: {
          iceServers: [{ urls: "stun:personal.stun.com" }]
        },
        swarmId: "example-swarm-id"
      }
    });
    Index

    Constructors

    constructor

    Methods

    injectMixin addEventListener removeEventListener getConfigForHlsJs getConfig applyDynamicConfig bindHls destroy

    Constructors

    Methods

    • Enhances a given Hls.js class by injecting additional Peer-to-Peer (P2P) functionalities.

      Parameters

      • hls: typeof Hls

      Returns new (
          config?: Partial<HlsConfig> & {
              p2p?: Partial<Omit<HlsJsP2PEngineConfig, "core">> & {
                  core?: Partial<CoreConfig>;
              } & { onHlsJsCreated?: (hls: HlsWithP2PInstance<typeof Hls>) => void };
          },
      ) => HlsWithP2PInstance<Hls>

      The enhanced Hls.js class with P2P functionalities.

      const HlsWithP2P = HlsJsP2PEngine.injectMixin(Hls);

      const hls = new HlsWithP2P({
        // Hls.js configuration
        startLevel: 0, // Example of Hls.js config parameter
        p2p: {
          core: {
            // P2P core configuration
          },
          onHlsJsCreated(hls) {
            // Do something with the Hls.js instance
          },
        },
      });

    • Adds an event listener for the specified event.

      Type Parameters

      Parameters

      • eventName: K

        The name of the event to listen for.

      • listener: CoreEventMap[K]

        The callback function to be invoked when the event is triggered.

      Returns void

      // Listening for a segment being successfully loaded
      p2pEngine.addEventListener('onSegmentLoaded', (details) => {
        console.log('Segment Loaded:', details);
      });

      // Handling segment load errors
      p2pEngine.addEventListener('onSegmentError', (errorDetails) => {
        console.error('Error loading segment:', errorDetails);
      });

      // Tracking data downloaded from peers
      p2pEngine.addEventListener('onChunkDownloaded', (bytesLength, downloadSource, peerId) => {
        console.log(`Downloaded ${bytesLength} bytes from ${downloadSource} ${peerId ? 'from peer ' + peerId : 'from server'}`);
      });

    • Provides the Hls.js P2P specific configuration for Hls.js loaders.

      Returns { fLoader: unknown; pLoader: unknown }

      An object containing the fragment loader (fLoader) and playlist loader (pLoader).

    • Applies dynamic configuration updates to the P2P engine.

      Parameters

      Returns void

      // Assuming `hlsP2PEngine` is an instance of HlsJsP2PEngine

      const newDynamicConfig = {
        core: {
          // Increase the number of cached segments to 1000
          cachedSegmentsCount: 1000,
          // 50 minutes of segments will be preemptively downloaded via HTTP connections
          httpDownloadTimeWindow: 3000,
          // 100 minutes of segments will be preemptively downloaded via P2P connections
          p2pDownloadTimeWindow: 6000,
        }
      };

      hlsP2PEngine.applyDynamicConfig(newDynamicConfig);

    • Sets the HLS instance used for handling media.

      Type Parameters

      • T = unknown

      Parameters

      • hls: T | (() => T)

        The HLS instance, or a function that returns an HLS instance.

      Returns void

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