mirror of
https://github.com/video-dev/hls.js.git
synced 2026-05-17 13:30:38 +00:00
Fix Live join following Interstitial preroll (#7846)
* Fix live join following preroll, including `_HLS_start_offset` on following midroll asset-list requests Fixes #7845 * Make live preroll resumption offset relative to live start Added rolling playlist update to test
This commit is contained in:
Rob Walch
GitHub
@@ -193,6 +193,12 @@ export default class BaseStreamController
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public get startPositionValue(): number {
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const { nextLoadPosition, startPosition } = this;
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if (startPosition === -1 && nextLoadPosition) {
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const details = this.getLevelDetails();
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if (details?.live) {
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const liveSyncPosition = this.hls.liveSyncPosition;
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const liveStart = liveSyncPosition || details.fragmentStart;
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return liveStart + this.timelineOffset;
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}
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return nextLoadPosition;
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}
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return startPosition;
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@@ -2229,8 +2235,7 @@ export default class BaseStreamController
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// in that case, reset startFragRequested flag
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if (!this.hls.hasEnoughToStart) {
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this.startFragRequested = false;
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const level = this.levelLastLoaded;
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const details = level ? level.details : null;
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const details = this.getLevelDetails();
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if (details?.live) {
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// Update the start position and return to IDLE to recover live start
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this.log(`resetting startPosition for live start`);
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@@ -1564,9 +1564,12 @@ export default class InterstitialsController
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main,
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};
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this.mediaSelection = currentSelection;
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const startPosition = this.hls.startPosition;
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this.schedule.parseInterstitialDateRanges(
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currentSelection,
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this.hls.config.interstitialAppendInPlace,
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startPosition === -1 ? 0 : startPosition,
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);
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if (!this.effectivePlayingItem && this.schedule.items) {
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@@ -1888,7 +1891,13 @@ Schedule: ${scheduleItems.map((seg) => segmentToString(seg))} pos: ${this.timeli
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if (!mediaSelection) {
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return;
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}
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this.schedule?.updateSchedule(mediaSelection, [], forceUpdate);
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const liveSyncPosition = this.hls?.liveSyncPosition || 0;
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this.schedule?.updateSchedule(
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mediaSelection,
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[],
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liveSyncPosition,
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forceUpdate,
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);
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}
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// Schedule buffer control
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@@ -2127,8 +2136,8 @@ Schedule: ${scheduleItems.map((seg) => segmentToString(seg))} pos: ${this.timeli
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const playOnce = interstitial.cue.once;
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if (neverLoaded) {
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const timelineStart = interstitial.timelineStart;
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const playingItem = this.playingItem;
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if (interstitial.appendInPlace) {
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const playingItem = this.playingItem;
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if (
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!this.isInterstitial(playingItem) &&
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playingItem?.nextEvent?.identifier === interstitial.identifier
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@@ -2138,7 +2147,11 @@ Schedule: ${scheduleItems.map((seg) => segmentToString(seg))} pos: ${this.timeli
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}
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let hlsStartOffset;
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let liveStartPosition = 0;
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if (!this.playingItem && this.primaryLive) {
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if (
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(!playingItem ||
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(this.isInterstitial(playingItem) && playingItem.event.cue.pre)) &&
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this.primaryLive
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) {
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liveStartPosition = this.hls.startPosition;
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if (liveStartPosition === -1) {
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liveStartPosition = this.hls.liveSyncPosition || 0;
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@@ -243,6 +243,7 @@ export class InterstitialsSchedule extends Logger {
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public parseInterstitialDateRanges(
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mediaSelection: MediaSelection,
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enableAppendInPlace: boolean,
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startPosition: number = 0,
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) {
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const details = mediaSelection.main.details!;
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const { dateRanges } = details;
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@@ -297,18 +298,23 @@ export class InterstitialsSchedule extends Logger {
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this.removeEvent(interstitial);
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});
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this.updateSchedule(mediaSelection, removedInterstitials);
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this.updateSchedule(mediaSelection, removedInterstitials, startPosition);
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}
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public updateSchedule(
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mediaSelection: MediaSelection,
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removedInterstitials: InterstitialEvent[] = [],
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startPosition: number = 0,
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forceUpdate: boolean = false,
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) {
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const events = this.events || [];
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if (events.length || removedInterstitials.length || this.length < 2) {
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const currentItems = this.items;
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const updatedItems = this.parseSchedule(events, mediaSelection);
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const updatedItems = this.parseSchedule(
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events,
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mediaSelection,
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startPosition,
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);
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const updated =
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forceUpdate ||
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removedInterstitials.length ||
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@@ -360,6 +366,7 @@ export class InterstitialsSchedule extends Logger {
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private parseSchedule(
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interstitialEvents: InterstitialEvent[],
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mediaSelection: MediaSelection,
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startPosition: number = 0,
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): InterstitialScheduleItem[] {
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const schedule: InterstitialScheduleItem[] = [];
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const details = mediaSelection.main.details!;
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@@ -391,7 +398,12 @@ export class InterstitialsSchedule extends Logger {
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interstitial.timelineOccupancy === TimelineOccupancy.Range
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? interstitialDuration
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: 0;
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const resumptionOffset = interstitial.resumptionOffset;
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const livePrerollResumption =
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preroll && details.live
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? startPosition + (interstitial.resumeOffset || 0)
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: 0;
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const resumptionOffset =
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livePrerollResumption || interstitial.resumptionOffset;
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const inSameStartTimeSequence = previousEvent?.startTime === eventStart;
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const start = eventStart + interstitial.cumulativeDuration;
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let end = appendInPlace
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@@ -475,7 +487,7 @@ export class InterstitialsSchedule extends Logger {
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// Interstitial starts after end of primary VOD - not included in schedule
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return;
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}
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const resumeTime = interstitial.resumeTime;
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const resumeTime = livePrerollResumption || interstitial.resumeTime;
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if (postroll || resumeTime > primaryDuration) {
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primaryPosition = primaryDuration;
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} else {
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@@ -2,6 +2,10 @@ import { config as chaiConfig, expect, use } from 'chai';
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import sinon from 'sinon';
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import sinonChai from 'sinon-chai';
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import InterstitialsController from '../../../src/controller/interstitials-controller';
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import {
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type InterstitialScheduleItem,
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segmentToString,
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} from '../../../src/controller/interstitials-schedule';
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import { Events } from '../../../src/events';
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import Hls from '../../../src/hls';
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import { TimelineOccupancy } from '../../../src/loader/interstitial-event';
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@@ -13,7 +17,6 @@ import { AttrList } from '../../../src/utils/attr-list';
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import { MockMediaElement } from '../../mocks/mock-media';
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import type { HlsConfig } from '../../../src/config';
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import type AbrController from '../../../src/controller/abr-controller';
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import type { InterstitialScheduleItem } from '../../../src/controller/interstitials-schedule';
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import type LatencyController from '../../../src/controller/latency-controller';
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import type LevelController from '../../../src/controller/level-controller';
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import type StreamController from '../../../src/controller/stream-controller';
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@@ -76,16 +79,17 @@ function expectItemToHaveProperties(
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schedule: InterstitialScheduleItem[],
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itemIndex: number,
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expected: Record<string, number | string | object | null>,
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note?: string,
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) {
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const item = schedule[itemIndex];
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Object.keys(expected).forEach((key) => {
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// Use deep equals on all properties except for InterstitialEvents ('event' and 'nextEvent')
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if (key === 'event' || key === 'nextEvent' || key === 'previousEvent') {
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expect(item, 'Schedule Index ' + itemIndex)
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expect(item, `${note || 'properties'}: Schedule Index ${itemIndex}`)
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.to.be.an('object')
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.which.has.property(key);
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const debug =
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`Schedule Index ${itemIndex} ['${key}']:` +
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`${note || 'properties'}: Schedule Index ${itemIndex} ['${key}']:` +
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JSON.stringify(
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item,
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(key, value) =>
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@@ -101,12 +105,12 @@ function expectItemToHaveProperties(
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expect(item[key], debug).includes(expectedValue);
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}
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} else {
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expect(item, 'Schedule Index ' + itemIndex)
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expect(item, `${note || 'properties'}: Schedule Index ${itemIndex}`)
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.to.be.an('object')
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.which.has.property(key)
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.which.deep.equals(
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expected[key],
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`Schedule Index ${itemIndex} ['${key}']:` +
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`${note || 'properties'}: Schedule Index ${itemIndex} ['${key}']:` +
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JSON.stringify(
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item,
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(key, value) =>
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@@ -114,7 +118,11 @@ function expectItemToHaveProperties(
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key === 'previousEvent' ||
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key === 'event'
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? `${key} <${value ? value.identifier : value}>`
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: value,
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: typeof value !== 'number'
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? value
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: Number.isFinite(value)
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? value
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: `<${value}>`,
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2,
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),
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);
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@@ -125,13 +133,19 @@ function expectItemToHaveProperties(
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function expectScheduleToInclude(
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schedule: InterstitialScheduleItem[],
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itemAssertions: Record<string, number | string | object | null>[],
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note?: string,
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) {
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expect(schedule).to.have.lengthOf(itemAssertions.length);
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note = `${note || 'schedule-length'}: ${scheduleToString(schedule)}`;
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expect(schedule, note).to.have.lengthOf(itemAssertions.length);
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itemAssertions.forEach((assertion, i) => {
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expectItemToHaveProperties(schedule, i, assertion);
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expectItemToHaveProperties(schedule, i, assertion, note);
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});
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}
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function scheduleToString(schedule: InterstitialScheduleItem[]) {
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return schedule.map((item) => segmentToString(item)).join(', ');
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}
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describe('InterstitialsController', function () {
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const sandbox = sinon.createSandbox();
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let hls: HlsTestable;
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@@ -2183,4 +2197,330 @@ media_w507366714_268.ts`;
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expect(interstitials.primary.currentTime).to.equal(0, 'timelinePos b');
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});
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});
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describe('#7845 Live start folloing preroll', function () {
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describe('resumes at live-edge', function () {
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const playlist = `#EXTM3U
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#EXT-X-TARGETDURATION:6
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#EXT-X-VERSION:7
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#EXT-X-MEDIA-SEQUENCE:1
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#EXT-X-PROGRAM-DATE-TIME:2024-02-23T15:00:00.000Z
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#EXT-X-DATERANGE:ID="pre-resume-at-live",CLASS="com.apple.hls.interstitial",START-DATE="2024-02-23T15:00:00.000Z",CUE="PRE,ONCE",DURATION=15,X-ASSET-URI="https://example.com/pre.m3u8?_HLS_interstitial_id=pre-resume-at-live"
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#EXT-X-MAP:URI="fileSequence0.mp4"
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#EXTINF:6.000,
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fileSequence1.mp4
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#EXTINF:6.000,
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fileSequence2.mp4
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#EXTINF:6.000,
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fileSequence3.mp4
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#EXTINF:6.000,
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fileSequence4.mp4
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#EXT-X-DATERANGE:ID="mid-starts-at-24",CLASS="com.apple.hls.interstitial",START-DATE="2024-02-23T15:00:24.000Z",X-TIMELINE-OCCUPIES="RANGE",DURATION=10,X-ASSET-LIST="https://example.com/mid-list.json?_HLS_interstitial_id=mid-starts-at-24"
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#EXTINF:6.000,
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fileSequence5.mp4
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#EXTINF:6.000,
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fileSequence6.mp4
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#EXTINF:6.000,
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fileSequence7.mp4
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#EXTINF:6.000,
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fileSequence8.mp4`;
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it('should include _HLS_start_offset in midroll asset-list request, following preroll with implicit resumption offset', function () {
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setLoadedLevelDetails(playlist);
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const interstitials = interstitialsController.interstitialsManager;
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if (!interstitials) {
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expect(interstitials, 'interstitialsManager').to.be.an('object');
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return;
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}
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expect(interstitials.bufferingIndex).to.equal(-1, 'bufferingIndex');
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expect(interstitials.playingIndex).to.equal(-1, 'playingIndex');
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expect(interstitials.events).is.an('array').which.has.lengthOf(2);
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expectScheduleToInclude(
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interstitials.schedule,
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[
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{
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event: {
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identifier: 'pre-resume-at-live',
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},
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start: 0,
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end: 30,
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playout: { start: 0, end: 15 },
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integrated: { start: 0, end: 0 },
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},
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{
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event: {
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identifier: 'mid-starts-at-24',
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},
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start: 24,
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end: 34,
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playout: { start: 15, end: 25 },
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integrated: { start: 0, end: 10 },
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},
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{
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previousEvent: {
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identifier: 'mid-starts-at-24',
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},
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nextEvent: null,
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start: 34,
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end: Infinity,
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playout: { start: 25, end: Infinity },
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integrated: { start: 10, end: Infinity },
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},
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],
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'before-preroll',
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);
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attachMediaToHls();
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expect(interstitials.bufferingIndex).to.equal(0, 'bufferingIndex');
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expect(interstitials.playingIndex).to.equal(0, 'playingIndex');
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expect(
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interstitials.interstitialPlayer,
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`interstitialPlayer`,
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).to.include({
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playingIndex: 0,
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currentTime: 0,
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duration: 15,
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});
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expect(
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interstitials.interstitialPlayer?.scheduleItem?.event,
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`interstitialPlayer.scheduleItem`,
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).to.include({ identifier: 'pre-resume-at-live' });
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expect(interstitials.events[1].assetListLoader).to.equal(undefined);
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// Capture asset-list request
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const loadSpy = sandbox.spy(hls.config.loader.prototype, 'load');
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const primaryId = hls.sessionId;
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// skip preroll to advance schedule
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interstitials.skip();
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expect(loadSpy).calledOnce;
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const assetListUrl = loadSpy.getCalls()[0].args[0].url;
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expect(
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assetListUrl,
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'_HLS_primary_id and _HLS_start_offset match',
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).to.equal(
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`https://example.com/mid-list.json?_HLS_interstitial_id=mid-starts-at-24&_HLS_primary_id=${primaryId}&_HLS_start_offset=6`,
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);
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// Removing the CUE="ONCE" interstitial changes the `schedule` items, but does not remove it from `events`
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expect(interstitials.events).is.an('array').which.has.lengthOf(2);
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expectScheduleToInclude(
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interstitials.schedule,
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[
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{
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previousEvent: null,
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nextEvent: {
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identifier: 'mid-starts-at-24',
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},
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start: 0,
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end: 24,
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playout: { start: 0, end: 24 },
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integrated: { start: 0, end: 24 },
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},
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{
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event: {
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identifier: 'mid-starts-at-24',
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},
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start: 24,
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end: 34,
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playout: { start: 24, end: 34 },
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integrated: { start: 24, end: 34 },
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},
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{
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previousEvent: {
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identifier: 'mid-starts-at-24',
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},
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nextEvent: null,
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start: 34,
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end: Infinity,
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playout: { start: 34, end: Infinity },
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integrated: { start: 34, end: Infinity },
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},
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],
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'after-preroll',
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);
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expect(interstitials.bufferingIndex).to.equal(1, 'bufferingIndex b');
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expect(interstitials.playingIndex).to.equal(1, 'playingIndex b');
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expect(interstitials.primary.currentTime).to.equal(30, 'timelinePos b');
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});
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});
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describe('resumes at X-RESUME-OFFSET=15 (t + 15)', function () {
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const playlist = `#EXTM3U
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#EXT-X-TARGETDURATION:10
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#EXT-X-VERSION:7
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#EXT-X-MEDIA-SEQUENCE:1
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#EXT-X-PROGRAM-DATE-TIME:2024-02-23T15:00:00.000Z
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#EXT-X-DATERANGE:ID="pre-resume-at-t15",CLASS="com.apple.hls.interstitial",START-DATE="2024-02-23T15:00:00.000Z",CUE="PRE,ONCE",DURATION=15,X-RESUME-OFFSET=15,X-ASSET-URI="https://example.com/pre.m3u8?_HLS_interstitial_id=pre-resume-at-t15"
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#EXT-X-MAP:URI="fileSequence0.mp4"
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#EXTINF:10.000,
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fileSequence-0.s
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#EXTINF:10.000,
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fileSequence-10.s
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#EXTINF:10.000,
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fileSequence-20.s
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#EXTINF:10.000,
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fileSequence-30.s
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#EXTINF:10.000,
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fileSequence-40.s
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#EXTINF:10.000,
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fileSequence-50.s
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# ends with 60s duration, live start @30 (-n3)
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#EXT-X-DATERANGE:ID="mid-starts-at-40",CLASS="com.apple.hls.interstitial",START-DATE="2024-02-23T15:00:40.000Z",X-TIMELINE-OCCUPIES="RANGE",DURATION=10,X-ASSET-LIST="https://example.com/mid-list.json?_HLS_interstitial_id=mid-starts-at-40"
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`;
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const playlist2 = `#EXTM3U
|
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#EXT-X-TARGETDURATION:10
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#EXT-X-VERSION:7
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#EXT-X-MEDIA-SEQUENCE:1
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#EXT-X-PROGRAM-DATE-TIME:2024-02-23T15:00:00.000Z
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#EXT-X-DATERANGE:ID="pre-resume-at-t15",CLASS="com.apple.hls.interstitial",START-DATE="2024-02-23T15:00:00.000Z",CUE="PRE,ONCE",DURATION=15,X-RESUME-OFFSET=15,X-ASSET-URI="https://example.com/pre.m3u8?_HLS_interstitial_id=pre-resume-at-t15"
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#EXT-X-MAP:URI="fileSequence0.mp4"
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#EXTINF:10.000,
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fileSequence-0.s
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#EXTINF:10.000,
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fileSequence-10.s
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#EXTINF:10.000,
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fileSequence-20.s
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#EXTINF:10.000,
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fileSequence-30.s
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#EXTINF:10.000,
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fileSequence-40.s
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#EXTINF:10.000,
|
||||
fileSequence-50.s
|
||||
#EXT-X-DATERANGE:ID="mid-starts-at-40",CLASS="com.apple.hls.interstitial",START-DATE="2024-02-23T15:00:40.000Z",X-TIMELINE-OCCUPIES="RANGE",DURATION=10,X-ASSET-LIST="https://example.com/mid-list.json?_HLS_interstitial_id=mid-starts-at-40"
|
||||
#EXTINF:10.000,
|
||||
fileSequence-60.s
|
||||
`;
|
||||
|
||||
it('should include _HLS_start_offset in midroll asset-list request, following preroll with explicit resumption offset', function () {
|
||||
attachMediaToHls();
|
||||
const details = setLoadedLevelDetails(playlist);
|
||||
const interstitials = interstitialsController.interstitialsManager;
|
||||
if (!interstitials) {
|
||||
expect(interstitials, 'interstitialsManager').to.be.an('object');
|
||||
return;
|
||||
}
|
||||
expect(interstitials.events).is.an('array').which.has.lengthOf(2);
|
||||
expectScheduleToInclude(
|
||||
interstitials.schedule,
|
||||
[
|
||||
{
|
||||
event: {
|
||||
identifier: 'pre-resume-at-t15',
|
||||
},
|
||||
start: 0,
|
||||
end: 45,
|
||||
playout: { start: 0, end: 15 },
|
||||
integrated: { start: 0, end: 0 },
|
||||
},
|
||||
{
|
||||
event: {
|
||||
identifier: 'mid-starts-at-40',
|
||||
},
|
||||
start: 40,
|
||||
end: 50,
|
||||
playout: { start: 15, end: 25 },
|
||||
integrated: { start: 0, end: 10 },
|
||||
},
|
||||
{
|
||||
previousEvent: {
|
||||
identifier: 'mid-starts-at-40',
|
||||
},
|
||||
nextEvent: null,
|
||||
start: 50,
|
||||
end: Infinity,
|
||||
playout: { start: 25, end: Infinity },
|
||||
integrated: { start: 10, end: Infinity },
|
||||
},
|
||||
],
|
||||
'before-preroll',
|
||||
);
|
||||
|
||||
expect(interstitials.bufferingIndex).to.equal(0, 'bufferingIndex');
|
||||
expect(interstitials.playingIndex).to.equal(0, 'playingIndex');
|
||||
expect(
|
||||
interstitials.interstitialPlayer,
|
||||
`interstitialPlayer`,
|
||||
).to.include({
|
||||
playingIndex: 0,
|
||||
currentTime: 0,
|
||||
duration: 15,
|
||||
});
|
||||
expect(
|
||||
interstitials.interstitialPlayer?.scheduleItem?.event,
|
||||
`interstitialPlayer.scheduleItem`,
|
||||
).to.include({ identifier: 'pre-resume-at-t15' });
|
||||
|
||||
expect(interstitials.events[1].assetListLoader).to.equal(undefined);
|
||||
|
||||
// Capture asset-list request
|
||||
const loadSpy = sandbox.spy(hls.config.loader.prototype, 'load');
|
||||
const primaryId = hls.sessionId;
|
||||
|
||||
// Advance playlists
|
||||
const timeSinceLoadedStub = sinon.stub(details, 'age');
|
||||
timeSinceLoadedStub.get(() => 15);
|
||||
|
||||
const details2 = setLoadedLevelDetails(playlist2);
|
||||
const timeSinceLoadedStub2 = sinon.stub(details2, 'age');
|
||||
timeSinceLoadedStub2.get(() => 5);
|
||||
|
||||
// skip preroll to advance schedule
|
||||
interstitials.skip();
|
||||
|
||||
expect(loadSpy).calledOnce;
|
||||
const assetListUrl = loadSpy.getCalls()[0].args[0].url;
|
||||
expect(
|
||||
assetListUrl,
|
||||
'_HLS_primary_id and _HLS_start_offset match',
|
||||
).to.equal(
|
||||
`https://example.com/mid-list.json?_HLS_interstitial_id=mid-starts-at-40&_HLS_primary_id=${primaryId}&_HLS_start_offset=5`,
|
||||
);
|
||||
|
||||
// Removing the CUE="ONCE" interstitial changes the `schedule` items, but does not remove it from `events`
|
||||
expect(interstitials.events).is.an('array').which.has.lengthOf(2);
|
||||
expectScheduleToInclude(
|
||||
interstitials.schedule,
|
||||
[
|
||||
{
|
||||
previousEvent: null,
|
||||
nextEvent: {
|
||||
identifier: 'mid-starts-at-40',
|
||||
},
|
||||
start: 0,
|
||||
end: 40,
|
||||
playout: { start: 0, end: 40 },
|
||||
integrated: { start: 0, end: 40 },
|
||||
},
|
||||
{
|
||||
event: {
|
||||
identifier: 'mid-starts-at-40',
|
||||
},
|
||||
start: 40,
|
||||
end: 50,
|
||||
playout: { start: 40, end: 50 },
|
||||
integrated: { start: 40, end: 50 },
|
||||
},
|
||||
{
|
||||
previousEvent: {
|
||||
identifier: 'mid-starts-at-40',
|
||||
},
|
||||
nextEvent: null,
|
||||
start: 50,
|
||||
end: Infinity,
|
||||
playout: { start: 50, end: Infinity },
|
||||
integrated: { start: 50, end: Infinity },
|
||||
},
|
||||
],
|
||||
'after-preroll',
|
||||
);
|
||||
expect(interstitials.bufferingIndex).to.equal(1, 'bufferingIndex b');
|
||||
expect(interstitials.playingIndex).to.equal(1, 'playingIndex b');
|
||||
expect(interstitials.primary.currentTime).to.equal(40, 'timelinePos b');
|
||||
});
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
Reference in New Issue
Block a user