@livepeer/core-web/dist/hls/index.js

Livepeer UI Kit's core web library, for adding reactive stores to video elements.

// src/hls/hls.ts
import {
  calculateVideoQualityDimensions
} from "@livepeer/core/media";
import Hls from "hls.js";

// src/media/utils.ts
import { noop } from "@livepeer/core/utils";
var isClient = () => typeof window !== "undefined";

// src/hls/hls.ts
var VIDEO_HLS_INITIALIZED_ATTRIBUTE = "data-livepeer-video-hls-initialized";
var isHlsSupported = () => isClient() ? Hls.isSupported() : true;
var createNewHls = ({
  source,
  element,
  callbacks,
  aspectRatio,
  config,
  initialQuality
}) => {
  if (element.getAttribute(VIDEO_HLS_INITIALIZED_ATTRIBUTE) === "true") {
    return {
      setQuality: () => {
      },
      destroy: () => {
      }
    };
  }
  element.setAttribute(VIDEO_HLS_INITIALIZED_ATTRIBUTE, "true");
  const hls = new Hls({
    backBufferLength: 60 * 1.5,
    manifestLoadingMaxRetry: 0,
    fragLoadingMaxRetry: 0,
    levelLoadingMaxRetry: 0,
    appendErrorMaxRetry: 0,
    ...config,
    ...config?.liveSyncDurationCount ? {
      liveSyncDurationCount: config.liveSyncDurationCount
    } : {
      liveMaxLatencyDurationCount: 7,
      liveSyncDurationCount: 3
    }
  });
  const onDestroy = () => {
    hls?.destroy?.();
    element?.removeAttribute?.(VIDEO_HLS_INITIALIZED_ATTRIBUTE);
  };
  if (element) {
    hls.attachMedia(element);
  }
  let redirected = false;
  hls.on(Hls.Events.LEVEL_LOADED, async (_e, data) => {
    const { live, totalduration: duration, url } = data.details;
    if (!redirected) {
      callbacks?.onRedirect?.(url ?? null);
      redirected = true;
    }
    callbacks?.onLive?.(Boolean(live));
    callbacks?.onDuration?.(duration ?? 0);
  });
  hls.on(Hls.Events.MEDIA_ATTACHED, async () => {
    hls.loadSource(source);
    hls.on(Hls.Events.MANIFEST_PARSED, (_event, _data) => {
      setQuality({
        hls: hls ?? null,
        quality: initialQuality,
        aspectRatio
      });
      callbacks?.onCanPlay?.();
      if (config.autoPlay) element?.play?.();
    });
  });
  hls.on(Hls.Events.ERROR, async (_event, data) => {
    const { details, fatal } = data;
    const isManifestParsingError = details === "manifestParsingError";
    if (!fatal && !isManifestParsingError) return;
    callbacks?.onError?.(data);
    if (fatal) {
      console.error(`Fatal error : ${data.details}`);
      switch (data.type) {
        case Hls.ErrorTypes.MEDIA_ERROR:
          hls.recoverMediaError();
          break;
        case Hls.ErrorTypes.NETWORK_ERROR:
          console.error(`A network error occurred: ${data.details}`);
          break;
        default:
          console.error(`An unrecoverable error occurred: ${data.details}`);
          hls.destroy();
          break;
      }
    }
  });
  function updateOffset() {
    const currentDate = Date.now();
    const newDate = hls.playingDate;
    if (newDate && currentDate) {
      callbacks?.onPlaybackOffsetUpdated?.(currentDate - newDate.getTime());
    }
  }
  const updateOffsetInterval = setInterval(updateOffset, 2e3);
  return {
    destroy: () => {
      onDestroy?.();
      clearInterval?.(updateOffsetInterval);
      element?.removeAttribute?.(VIDEO_HLS_INITIALIZED_ATTRIBUTE);
    },
    setQuality: (videoQuality) => {
      setQuality({
        hls: hls ?? null,
        quality: videoQuality,
        aspectRatio
      });
    }
  };
};
var setQuality = ({
  hls,
  quality,
  aspectRatio
}) => {
  if (hls) {
    const { width } = calculateVideoQualityDimensions(quality, aspectRatio);
    if (!width || quality === "auto") {
      hls.currentLevel = -1;
      return;
    }
    if (hls.levels && hls.levels.length > 0) {
      const sortedLevels = hls.levels.map((level, index) => ({ ...level, index })).sort(
        (a, b) => Math.abs((width ?? 0) - a.width) - Math.abs((width ?? 0) - b.width)
      );
      const bestMatchLevel = sortedLevels?.[0];
      if ((bestMatchLevel?.index ?? -1) >= 0) {
        hls.currentLevel = bestMatchLevel.index;
      } else {
        hls.currentLevel = -1;
      }
    }
  }
};
export {
  VIDEO_HLS_INITIALIZED_ATTRIBUTE,
  createNewHls,
  isHlsSupported
};
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