mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-14 15:56:38 +03:00
Wojciech Tyczyński
048ee45631
When evicting segments based on time, evict only first period and proceed to next ones only when first is already empty.
1182 lines
41 KiB
JavaScript
1182 lines
41 KiB
JavaScript
/*! @license
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* Shaka Player
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* Copyright 2016 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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describe('SegmentIndex', /** @suppress {accessControls} */ () => {
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const actual1 = makeReference(uri(0), 0, 10);
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const actual2 = makeReference(uri(20), 10, 20);
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const actual3 = makeReference(uri(20), 20, 30);
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describe('find', () => {
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it('finds the correct references', () => {
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// One reference.
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let index = new shaka.media.SegmentIndex([actual1]);
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let pos1 = index.find(5);
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expect(pos1).toBe(0);
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// Two references.
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index = new shaka.media.SegmentIndex([actual1, actual2]);
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pos1 = index.find(5);
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let pos2 = index.find(15);
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expect(pos1).toBe(0);
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expect(pos2).toBe(1);
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// Three references.
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index = new shaka.media.SegmentIndex([actual1, actual2, actual3]);
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pos1 = index.find(5);
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pos2 = index.find(15);
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const pos3 = index.find(25);
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expect(pos1).toBe(0);
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expect(pos2).toBe(1);
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expect(pos3).toBe(2);
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});
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it('works if time == first start time', () => {
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const actual = makeReference(uri(10), 10, 20);
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const index = new shaka.media.SegmentIndex([actual]);
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const pos = index.find(10);
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goog.asserts.assert(pos != null, 'Null position!');
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const ref = index.get(pos);
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expect(ref).toBe(actual);
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});
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it('works with two references if time == second start time', () => {
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const actual1 = makeReference(uri(10), 10, 20);
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const actual2 = makeReference(uri(20), 20, 30);
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const index = new shaka.media.SegmentIndex([actual1, actual2]);
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const pos = index.find(20);
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goog.asserts.assert(pos != null, 'Null position!');
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const ref = index.get(pos);
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expect(ref).toBe(actual2);
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});
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it('works with two references if time == first end time', () => {
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const actual1 = makeReference(uri(10), 10, 20.12);
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const actual2 = makeReference(uri(20), 20.13, 30);
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const index = new shaka.media.SegmentIndex([actual1, actual2]);
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const pos = index.find(20.12);
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goog.asserts.assert(pos != null, 'Null position!');
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const ref = index.get(pos);
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expect(ref).toBe(actual1);
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});
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it('works with time is between first endTime and second startTime', () => {
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const actual1 = makeReference(uri(10), 10, 20.12111);
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const actual2 = makeReference(uri(20), 20.12113, 30);
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const index = new shaka.media.SegmentIndex([actual1, actual2]);
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const pos = index.find(20.12112);
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goog.asserts.assert(pos != null, 'Null position!');
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const ref = index.get(pos);
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expect(ref).toBe(actual1);
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});
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it('returns the first segment if time < first start time', () => {
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const actual = makeReference(uri(10), 10, 20);
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const index = new shaka.media.SegmentIndex([actual]);
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const pos = index.find(5);
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goog.asserts.assert(pos != null, 'Null position!');
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const ref = index.get(pos);
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expect(ref).toBe(actual);
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});
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it('returns null if time == last end time', () => {
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const actual = makeReference(uri(10), 10, 20);
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const index = new shaka.media.SegmentIndex([actual]);
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const pos = index.find(20);
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expect(pos).toBeNull();
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});
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it('returns null if time > last end time', () => {
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const actual = makeReference(uri(10), 10, 20);
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const index = new shaka.media.SegmentIndex([actual]);
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const pos = index.find(21);
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expect(pos).toBeNull();
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});
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});
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describe('get', () => {
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it('returns the correct references', () => {
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// One reference.
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let index = new shaka.media.SegmentIndex([actual1]);
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let r1 = index.get(0);
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expect(r1).toEqual(actual1);
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// Two references.
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index = new shaka.media.SegmentIndex([actual1, actual2]);
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r1 = index.get(0);
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let r2 = index.get(1);
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expect(r1).toEqual(actual1);
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expect(r2).toEqual(actual2);
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// Three references.
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index = new shaka.media.SegmentIndex([actual1, actual2, actual3]);
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r1 = index.get(0);
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r2 = index.get(1);
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let r3 = index.get(2);
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expect(r1).toEqual(actual1);
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expect(r2).toEqual(actual2);
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expect(r3).toEqual(actual3);
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// Two references with offset.
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index = new shaka.media.SegmentIndex([actual2, actual3]);
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r2 = index.get(0);
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r3 = index.get(1);
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expect(r2).toEqual(actual2);
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expect(r3).toEqual(actual3);
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// One reference with offset.
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index = new shaka.media.SegmentIndex([actual3]);
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r3 = index.get(0);
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expect(r3).toEqual(actual3);
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});
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it('returns null with zero references', () => {
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const index = new shaka.media.SegmentIndex([]);
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expect(index.get(0)).toBeNull();
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});
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it('returns null if position < 0', () => {
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const index = new shaka.media.SegmentIndex([actual1, actual2, actual3]);
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expect(index.get(-1)).toBeNull();
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});
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it('returns null for unknown positions', () => {
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const index = new shaka.media.SegmentIndex([actual1, actual2, actual3]);
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expect(index.get(3)).toBeNull();
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expect(index.get(-1)).toBeNull();
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});
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});
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describe('fit', () => {
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it('clamps references to the window bounds', () => {
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// These negative numbers can occur due to presentationTimeOffset in DASH.
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const references = [
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makeReference(uri(0), -10, -3),
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makeReference(uri(1), -3, 4),
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makeReference(uri(2), 4, 11),
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makeReference(uri(3), 11, 18),
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makeReference(uri(4), 18, 25),
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];
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const index = new shaka.media.SegmentIndex(references);
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expect(index.references).toEqual(references);
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// Get the position and reference of the segment at time 5.
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const positionAtTimeFive = index.find(5);
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goog.asserts.assert(positionAtTimeFive != null, 'Null position!');
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const referenceAtTimeFive = index.get(positionAtTimeFive);
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index.fit(/* windowStart= */ 0, /* windowEnd= */ 15);
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const newReferences = [
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/* ref 0 dropped because it ends before the period starts */
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makeReference(uri(1), -3, 4),
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makeReference(uri(2), 4, 11),
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makeReference(uri(3), 11, 15), // end time clamped to period
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/* ref 4 dropped because it starts after the period ends */
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];
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expect(index.references).toEqual(newReferences);
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// The position used to represent this segment should not have changed.
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expect(index.find(5)).toBe(positionAtTimeFive);
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expect(index.get(positionAtTimeFive)).toBe(referenceAtTimeFive);
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});
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it('drops references which end exactly at window start', () => {
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// The end time is meant to be exclusive, so segments ending at window
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// start should be dropped.
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const references = [
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makeReference(uri(0), -10, 0),
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makeReference(uri(1), 0, 10),
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];
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const index = new shaka.media.SegmentIndex(references);
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expect(index.references).toEqual(references);
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index.fit(/* windowStart= */ 0, /* windowEnd= */ 10);
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const newReferences = [
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/* ref 0 dropped because it ends when the window start (at 0) */
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makeReference(uri(1), 0, 10),
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];
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expect(index.references).toEqual(newReferences);
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});
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it('preserves hls key of the last reference', () => {
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const aesKey = {
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bitsKey: 128,
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blockCipherMode: 'CBC',
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firstMediaSequenceNumber: 0,
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};
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// The hls key of the last segment should be preserved.
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const references = [
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makeReference(uri(0), 0, 5, [], aesKey),
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makeReference(uri(1), 5, 10, [], aesKey),
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makeReference(uri(2), 10, 15, [], aesKey),
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];
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const index = new shaka.media.SegmentIndex(references);
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expect(index.references).toEqual(references);
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index.fit(/* windowStart= */ 0, /* windowEnd= */ 10);
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expect(
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index.references[index.references.length - 1].aesKey,
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).toEqual(aesKey);
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});
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});
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describe('merge', () => {
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it('three references into zero references', () => {
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const index1 = new shaka.media.SegmentIndex([]);
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const references2 = [actual1, actual2, actual3];
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index1.merge(references2);
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expect(index1.references.length).toBe(3);
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expect(index1.references).toEqual(references2);
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});
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it('zero references into three references', () => {
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const references1 = [actual1, actual2, actual3];
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const index1 = new shaka.media.SegmentIndex(references1);
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index1.merge([]);
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expect(index1.references.length).toBe(3);
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expect(index1.references).toEqual(references1);
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});
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it('one reference into one reference at end', () => {
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const references1 = [makeReference(uri(10), 10, 20)];
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const index1 = new shaka.media.SegmentIndex(references1);
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const references2 = [makeReference(uri(20), 20, 30)];
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index1.merge(references2);
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expect(index1.references.length).toBe(2);
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expect(index1.references[0]).toEqual(references1[0]);
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expect(index1.references[1]).toEqual(references2[0]);
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});
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it('one reference into two references at end', () => {
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const references1 = [
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makeReference(uri(10), 10, 20),
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makeReference(uri(20), 20, 30),
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];
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const index1 = new shaka.media.SegmentIndex(references1);
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const references2 = [makeReference(uri(30), 30, 40)];
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index1.merge(references2);
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expect(index1.references.length).toBe(3);
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expect(index1.references[0]).toEqual(references1[0]);
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expect(index1.references[1]).toEqual(references1[1]);
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expect(index1.references[2]).toEqual(references2[0]);
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});
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it('two references into one reference at end', () => {
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const references1 = [makeReference(uri(20), 20, 30)];
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const index1 = new shaka.media.SegmentIndex(references1);
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const references2 = [
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makeReference(uri(30), 30, 40),
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makeReference(uri(40), 40, 50),
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];
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index1.merge(references2);
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expect(index1.references.length).toBe(3);
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expect(index1.references[0]).toEqual(references1[0]);
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expect(index1.references[1]).toEqual(references2[0]);
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expect(index1.references[2]).toEqual(references2[1]);
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});
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it('last live stream reference when period change', () => {
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const references1 = [
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makeReference(uri(10), 10, 20),
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makeReference(uri(20), 20, 30),
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makeReference(uri(30), 30, 49.887),
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];
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const index1 = new shaka.media.SegmentIndex(references1);
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// When the period is changed, fit() will expand last segment to the start
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// of the next the period. This simulates an update in which fit() has
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// done that.
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const references2 = [
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makeReference(uri(20), 20, 30),
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makeReference(uri(30), 30, 50),
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];
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index1.merge(references2);
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expect(index1.references.length).toBe(3);
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expect(index1.references[0]).toEqual(references1[0]);
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expect(index1.references[1]).toEqual(references2[0]);
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expect(index1.references[2]).toEqual(references2[1]);
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});
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it('references with partial segments of the same parent segment', () => {
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// refs1: [[[0,5][5,10]]]
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// refs2: [[[0,5][5,10][10,15]]]
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// Merged: [[[0,5][5,10][10,15]]]
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const partialRefs1 = [
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makeReference(uri(0.5), 0, 5),
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makeReference(uri(5.10), 5, 10),
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];
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const partialRefs2 = [
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makeReference(uri(0.5), 0, 5),
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makeReference(uri(5.10), 5, 10),
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makeReference(uri(10.15), 10, 15),
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];
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const refs1 = [
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makeReference(uri(0.10), 0, 10, partialRefs1),
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];
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const refs2 = [
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makeReference(uri(0.15), 0, 15, partialRefs2),
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];
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const index1 = new shaka.media.SegmentIndex(refs1);
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index1.merge(refs2);
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expect(index1.references).toEqual(refs2);
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});
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it('references with partial segments', () => {
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// refs1: [[0,10], [[10,15][15,20]]]
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// refs2: [ [[10,15][15,20][20,25]]]
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// Merged:[[0,10], [[10,15][15,20][20,25]]]
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const partialRefs1 = [
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makeReference(uri(10.15), 10, 15),
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makeReference(uri(15.20), 15, 20),
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];
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const partialRefs2 = [
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makeReference(uri(10.15), 10, 15),
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makeReference(uri(15.20), 15, 20),
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makeReference(uri(20.25), 20, 25),
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];
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const refs1 = [
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makeReference(uri(0.10), 0, 10),
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makeReference(uri(10.20), 10, 20, partialRefs1),
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];
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const refs2 = [
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makeReference(uri(10.25), 10, 25, partialRefs2),
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];
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const index1 = new shaka.media.SegmentIndex(refs1);
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index1.merge(refs2);
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const expectedRefs = [refs1[0]].concat(refs2);
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expect(index1.references).toEqual(expectedRefs);
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});
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it('references and remove old partial segments ', () => {
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// refs1: [[0,10], [[10,15][15,20]]]]
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// refs2: [ [10,20], [[20,25][25,30]]]
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// Merged:[[0,10], [10,20], [[20,25][25,30]]]
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const partialRefs1 = [
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makeReference(uri(10.15), 10, 15),
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makeReference(uri(15.20), 15, 20),
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];
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const partialRefs2 = [
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makeReference(uri(20.25), 20, 25),
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makeReference(uri(25.30), 25, 30),
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];
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const refs1 = [
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makeReference(uri(0.10), 0, 10),
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makeReference(uri(10.20), 10, 20, partialRefs1),
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];
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const refs2 = [
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makeReference(uri(10.20), 10, 20),
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makeReference(uri(20.30), 20, 30, partialRefs2),
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];
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const index1 = new shaka.media.SegmentIndex(refs1);
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index1.merge(refs2);
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// Expect the first SegmentReference's partial SegmentReferences removed.
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const expectedRefs = [refs1[0]].concat(refs2);
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expect(index1.references).toEqual(expectedRefs);
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});
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it('references with only preload hinted segments', () => {
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// refs1: [[(preload-hint)[0,0]]]
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// refs2: [[[0,5][5,10]]]
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// Merged: [[[0,5][5,10]]]
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/** @type {!Array<!shaka.media.SegmentReference>} */
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// A segment with only preload hinted partial segment.
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const preloadRefs1 = [
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makeReference(uri(0.0), 0, 0),
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];
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const partialRefs2 = [
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// Previous preload hinted segment is replaced with a partial segment.
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makeReference(uri(0.5), 0, 5),
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makeReference(uri(5.10), 5, 10),
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];
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const refs1 = [
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makeReference(uri(0.0), 0, 0, preloadRefs1),
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];
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const refs2 = [
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makeReference(uri(0.10), 0, 10, partialRefs2),
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];
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const index1 = new shaka.media.SegmentIndex(refs1);
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index1.merge(refs2);
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expect(index1.references.length).toBe(1);
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expect(index1.references).toEqual(refs2);
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});
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it('references with preload hinted segments', () => {
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// refs1: [[[0,5],(preload-hint)[5,5]]]
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// refs2: [[[0,5][5,10][10,15]]]
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// Merged: [[[0,5][5,10][10,15]]]
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/** @type {!Array<!shaka.media.SegmentReference>} */
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const partialRefs1 = [
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makeReference(uri(0.5), 0, 5),
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// Preload hinted partial segment
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makeReference(uri(5.5), 5, 5),
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];
|
|
/** @type {!Array<!shaka.media.SegmentReference>} */
|
|
const partialRefs2 = [
|
|
makeReference(uri(0.5), 0, 5),
|
|
makeReference(uri(5.10), 5, 10),
|
|
makeReference(uri(10.15), 10, 15),
|
|
];
|
|
/** @type {!Array<!shaka.media.SegmentReference>} */
|
|
const refs1 = [
|
|
makeReference(uri(0.5), 0, 5, partialRefs1),
|
|
];
|
|
/** @type {!Array<!shaka.media.SegmentReference>} */
|
|
const refs2 = [
|
|
makeReference(uri(0.15), 0, 15, partialRefs2),
|
|
];
|
|
const index1 = new shaka.media.SegmentIndex(refs1);
|
|
index1.merge(refs2);
|
|
expect(index1.references.length).toBe(1);
|
|
expect(index1.references).toEqual(refs2);
|
|
});
|
|
});
|
|
|
|
describe('mergeAndEvict', () => {
|
|
it('discards segments that end before the availabilityWindowStart', () => {
|
|
/** @type {!Array<!shaka.media.SegmentReference>} */
|
|
const references1 = [
|
|
// Assuming ref(0, 10) has been already evicted
|
|
makeReference(uri(10), 10, 20),
|
|
];
|
|
const index1 = new shaka.media.SegmentIndex(references1);
|
|
|
|
/** @type {!Array<!shaka.media.SegmentReference>} */
|
|
const references2 = [
|
|
makeReference(uri(0), 0, 10),
|
|
makeReference(uri(10), 10, 20),
|
|
makeReference(uri(20), 20, 30),
|
|
];
|
|
|
|
// The first two references end before the availabilityWindowStart, so
|
|
// they should be discarded.
|
|
index1.mergeAndEvict(references2, 21);
|
|
expect(index1.references.length).toBe(1);
|
|
expect(index1.references[0]).toEqual(references2[2]);
|
|
});
|
|
|
|
it('discards segments that end before the first old segment', () => {
|
|
/** @type {!Array<!shaka.media.SegmentReference>} */
|
|
const references1 = [
|
|
// Assuming ref(0, 10) has been already evicted
|
|
makeReference(uri(10), 10, 20),
|
|
];
|
|
const index1 = new shaka.media.SegmentIndex(references1);
|
|
const position1 = index1.find(10);
|
|
|
|
/** @type {!Array<!shaka.media.SegmentReference>} */
|
|
const references2 = [
|
|
makeReference(uri(0), 0, 10),
|
|
makeReference(uri(10), 10, 20),
|
|
makeReference(uri(20), 20, 30),
|
|
];
|
|
|
|
// The new first reference ends before the first old reference starts, so
|
|
// it should be discarded. We will never grow the list at the beginning.
|
|
index1.mergeAndEvict(references2, 0);
|
|
expect(index1.references.length).toBe(2);
|
|
expect(index1.references[0]).toEqual(references2[1]);
|
|
expect(index1.references[1]).toEqual(references2[2]);
|
|
|
|
// The positions should be the same, as well.
|
|
expect(index1.find(10)).toBe(position1);
|
|
goog.asserts.assert(position1 != null, 'Position should not be null!');
|
|
expect(index1.get(position1)).toBe(references2[1]);
|
|
});
|
|
|
|
it('does not duplicate references with rounding errors', () => {
|
|
/** @type {!Array<!shaka.media.SegmentReference>} */
|
|
const references1 = [
|
|
makeReference(uri(10), 10, 20),
|
|
makeReference(uri(20), 20, 30),
|
|
];
|
|
const index1 = new shaka.media.SegmentIndex(references1);
|
|
|
|
// 0.24 microseconds: an insignificant rounding error.
|
|
const tinyError = 0.24e-6;
|
|
|
|
/** @type {!Array<!shaka.media.SegmentReference>} */
|
|
const references2 = [
|
|
makeReference(uri(10), 10, 20),
|
|
// The difference between this and the equivalent old reference is an
|
|
// insignificant rounding error.
|
|
makeReference(uri(20), 20 + tinyError, 30 + tinyError),
|
|
makeReference(uri(30), 30 + tinyError, 40),
|
|
];
|
|
|
|
index1.merge(references2);
|
|
expect(index1.references.length).toBe(3);
|
|
expect(index1.references[0]).toEqual(references1[0]);
|
|
// The new references replaced the old one.
|
|
expect(index1.references[1]).toEqual(references2[1]);
|
|
expect(index1.references[2]).toEqual(references2[2]);
|
|
});
|
|
});
|
|
|
|
describe('evict', () => {
|
|
/** @type {!shaka.media.SegmentIndex} */
|
|
let index1;
|
|
|
|
beforeEach(() => {
|
|
index1 = new shaka.media.SegmentIndex([actual1, actual2, actual3]);
|
|
});
|
|
|
|
it('no segments', () => {
|
|
index1.evict(5);
|
|
expect(index1.references.length).toBe(3);
|
|
});
|
|
|
|
it('one segment (edge)', () => {
|
|
index1.evict(10);
|
|
|
|
expect(index1.references.length).toBe(2);
|
|
expect(index1.references[0]).toEqual(actual2);
|
|
expect(index1.references[1]).toEqual(actual3);
|
|
});
|
|
|
|
it('one segment', () => {
|
|
index1.evict(11);
|
|
|
|
expect(index1.references.length).toBe(2);
|
|
expect(index1.references[0]).toEqual(actual2);
|
|
expect(index1.references[1]).toEqual(actual3);
|
|
});
|
|
|
|
it('two segments (edge)', () => {
|
|
index1.evict(20);
|
|
|
|
expect(index1.references.length).toBe(1);
|
|
expect(index1.references[0]).toEqual(actual3);
|
|
});
|
|
|
|
it('two segments', () => {
|
|
index1.evict(21);
|
|
|
|
expect(index1.references.length).toBe(1);
|
|
expect(index1.references[0]).toEqual(actual3);
|
|
});
|
|
|
|
it('three segments (edge)', () => {
|
|
index1.evict(30);
|
|
expect(index1.references.length).toBe(0);
|
|
});
|
|
|
|
it('three segments', () => {
|
|
index1.evict(31);
|
|
expect(index1.references.length).toBe(0);
|
|
});
|
|
|
|
it('does not change positions', () => {
|
|
// Get the position and reference of the segment at time 15.
|
|
const positionAtTimeFifteen = index1.find(15);
|
|
goog.asserts.assert(positionAtTimeFifteen != null, 'Null position!');
|
|
const referenceAtTimeFifteen = index1.get(positionAtTimeFifteen);
|
|
|
|
index1.evict(10);
|
|
|
|
// The position should not have changed.
|
|
expect(index1.find(15)).toBe(positionAtTimeFifteen);
|
|
expect(index1.get(positionAtTimeFifteen)).toBe(referenceAtTimeFifteen);
|
|
});
|
|
});
|
|
|
|
describe('SegmentIterator', () => {
|
|
const inputRefs = [
|
|
makeReference(uri(0.10), 0, 10),
|
|
makeReference(uri(10.20), 10, 20),
|
|
makeReference(uri(20.30), 20, 30),
|
|
];
|
|
|
|
const additionalRefs = [
|
|
makeReference(uri(30.40), 30, 40),
|
|
makeReference(uri(40.50), 40, 50),
|
|
makeReference(uri(50.60), 50, 60),
|
|
];
|
|
|
|
const partialRefs1 = [
|
|
makeReference(uri(10.15), 10, 15),
|
|
makeReference(uri(15.20), 15, 20),
|
|
];
|
|
|
|
const partialRefs2 = [
|
|
makeReference(uri(20.25), 20, 25),
|
|
makeReference(uri(25.30), 25, 30),
|
|
];
|
|
|
|
const inputRefsWithPartial = [
|
|
makeReference(uri(0.10), 0, 10),
|
|
makeReference(uri(10.20), 10, 20, partialRefs1),
|
|
makeReference(uri(20.30), 20, 30, partialRefs2),
|
|
];
|
|
|
|
|
|
it('works with Array.from', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefs);
|
|
const refs = Array.from(index);
|
|
expect(refs).toEqual(inputRefs);
|
|
});
|
|
|
|
it('works with Array.from with partial segments', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefsWithPartial);
|
|
const refs = Array.from(index);
|
|
|
|
const expectedRefs = [inputRefsWithPartial[0]].concat(
|
|
partialRefs1, partialRefs2);
|
|
expect(refs).toEqual(expectedRefs);
|
|
});
|
|
|
|
it('works with for-of', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefs);
|
|
const refs = [];
|
|
for (const ref of index) {
|
|
refs.push(ref);
|
|
}
|
|
expect(refs).toEqual(inputRefs);
|
|
});
|
|
|
|
it('works with for-of with partial segments', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefsWithPartial);
|
|
const refs = [];
|
|
for (const ref of index) {
|
|
refs.push(ref);
|
|
}
|
|
|
|
const expectedRefs = [inputRefsWithPartial[0]].concat(
|
|
partialRefs1, partialRefs2);
|
|
expect(refs).toEqual(expectedRefs);
|
|
});
|
|
|
|
it('works after eviction', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefs);
|
|
index.evict(15); // Drop the first ref.
|
|
expect(Array.from(index)).toEqual(inputRefs.slice(1));
|
|
});
|
|
|
|
it('resumes iteration after new references are added', () => {
|
|
const refs = inputRefs.slice();
|
|
const index = new shaka.media.SegmentIndex(refs);
|
|
|
|
// This simulates the pattern of calls in StreamingEngine when we buffer
|
|
// to the edge of a live stream.
|
|
const iterator = index[Symbol.iterator]();
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(inputRefs[0]);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(inputRefs[1]);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(inputRefs[2]);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(null);
|
|
// After we reach the end of the iteration, we should still get null back
|
|
// on subsequent requests.
|
|
expect(iterator.current()).toBe(null);
|
|
expect(iterator.current()).toBe(null);
|
|
|
|
// Although we have reached the end, we should still be able to add new
|
|
// references and iterate to them without starting over the iteration.
|
|
refs.push(...additionalRefs);
|
|
|
|
expect(iterator.current()).toBe(additionalRefs[0]);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(additionalRefs[1]);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(additionalRefs[2]);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(null);
|
|
});
|
|
|
|
it('reverse iteration', () => {
|
|
const refs = inputRefs.slice();
|
|
const index = new shaka.media.SegmentIndex(refs);
|
|
|
|
// This simulates the pattern of calls in StreamingEngine when we buffer
|
|
// to the edge of a live stream.
|
|
const iterator = index[Symbol.iterator]();
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(inputRefs[0]);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(inputRefs[1]);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(inputRefs[2]);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(null);
|
|
|
|
iterator.setReverse(true);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(inputRefs[2]);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(inputRefs[1]);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(inputRefs[0]);
|
|
|
|
iterator.next();
|
|
expect(iterator.current()).toBe(null);
|
|
});
|
|
|
|
describe('getIteratorForTime', () => {
|
|
it('begins with an independent partial segment', () => {
|
|
// This test contains its own segment refs, which are manipulated to
|
|
// look a little different from the more general ones used elsewhere.
|
|
// In particular, we mark some partial refs as dependent, and we make
|
|
// the second partial list much longer.
|
|
const partialRefs1 = [
|
|
makeReference(uri(10.15), 10, 15),
|
|
makeReference(uri(15.20), 15, 20),
|
|
];
|
|
partialRefs1[1].markAsNonIndependent();
|
|
|
|
const partialRefs2 = [
|
|
makeReference(uri(20.25), 20, 25),
|
|
makeReference(uri(25.30), 25, 30),
|
|
makeReference(uri(30.35), 30, 35),
|
|
makeReference(uri(35.40), 35, 40),
|
|
makeReference(uri(40.45), 40, 45),
|
|
makeReference(uri(45.50), 45, 50),
|
|
makeReference(uri(50.55), 50, 55),
|
|
makeReference(uri(55.60), 55, 60),
|
|
makeReference(uri(60.65), 60, 65),
|
|
makeReference(uri(65.70), 65, 70),
|
|
];
|
|
// All but the first:
|
|
for (const r of partialRefs2.slice(1)) {
|
|
r.markAsNonIndependent();
|
|
}
|
|
|
|
const localInputRefs = [
|
|
makeReference(uri(0.10), 0, 10),
|
|
makeReference(uri(10.20), 10, 20, partialRefs1),
|
|
makeReference(uri(20.70), 20, 70, partialRefs2),
|
|
];
|
|
const index = new shaka.media.SegmentIndex(localInputRefs);
|
|
|
|
// This time points to partialRefs1[0], which is independent.
|
|
const iterator1 = index.getIteratorForTime(11);
|
|
expect(iterator1.next().value).toBe(partialRefs1[0]);
|
|
|
|
// Even though the time would point to partialRefs1[1], that is not
|
|
// independent. So it walks back to partialRefs1[0].
|
|
const iterator2 = index.getIteratorForTime(16);
|
|
expect(iterator2.next().value).toBe(partialRefs1[0]);
|
|
|
|
// Even though the time would point to partialRefs2[9], that is not
|
|
// independent. So it walks all the way back to partialRefs2[0].
|
|
const iterator3 = index.getIteratorForTime(69);
|
|
expect(iterator3.next().value).toBe(partialRefs2[0]);
|
|
});
|
|
});
|
|
|
|
describe('next', () => {
|
|
it('starts with the first segment', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefs);
|
|
const iterator = index[Symbol.iterator]();
|
|
expect(iterator.next().value).toBe(inputRefs[0]);
|
|
});
|
|
|
|
it('iterates through all segments', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefs);
|
|
const iterator = index[Symbol.iterator]();
|
|
expect(iterator.next().value).toBe(inputRefs[0]);
|
|
expect(iterator.next().value).toBe(inputRefs[1]);
|
|
expect(iterator.next().value).toBe(inputRefs[2]);
|
|
expect(iterator.next().value).toBe(null);
|
|
});
|
|
|
|
it('iterates from getIteratorForTime', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefs);
|
|
const iterator = index.getIteratorForTime(10);
|
|
expect(iterator.next().value).toBe(inputRefs[1]);
|
|
expect(iterator.current()).toBe(inputRefs[1]);
|
|
expect(iterator.next().value).toBe(inputRefs[2]);
|
|
expect(iterator.current()).toBe(inputRefs[2]);
|
|
expect(iterator.next().value).toBe(null);
|
|
});
|
|
|
|
it('iterates from getIteratorForTime with partial segments', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefsWithPartial);
|
|
const iterator = index.getIteratorForTime(10);
|
|
expect(iterator.next().value).toBe(partialRefs1[0]);
|
|
expect(iterator.current()).toBe(partialRefs1[0]);
|
|
expect(iterator.next().value).toBe(partialRefs1[1]);
|
|
expect(iterator.current()).toBe(partialRefs1[1]);
|
|
expect(iterator.next().value).toBe(partialRefs2[0]);
|
|
expect(iterator.current()).toBe(partialRefs2[0]);
|
|
});
|
|
|
|
it('iterates through regular and partial segments', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefsWithPartial);
|
|
const iterator = index[Symbol.iterator]();
|
|
expect(iterator.next().value).toBe(inputRefsWithPartial[0]);
|
|
expect(iterator.next().value).toBe(partialRefs1[0]);
|
|
expect(iterator.next().value).toBe(partialRefs1[1]);
|
|
expect(iterator.next().value).toBe(partialRefs2[0]);
|
|
expect(iterator.next().value).toBe(partialRefs2[1]);
|
|
expect(iterator.next().value).toBe(null);
|
|
});
|
|
});
|
|
|
|
describe('current', () => {
|
|
it('starts with null', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefs);
|
|
const iterator = index[Symbol.iterator]();
|
|
// Technically, next() starts iteration, so current() returns null
|
|
// before next() is called.
|
|
expect(iterator.current()).toBe(null);
|
|
});
|
|
|
|
it('returns the same thing returned by the previous next() call', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefs);
|
|
const iterator = index[Symbol.iterator]();
|
|
|
|
expect(iterator.next().value).toBe(inputRefs[0]);
|
|
expect(iterator.current()).toBe(inputRefs[0]);
|
|
|
|
expect(iterator.next().value).toBe(inputRefs[1]);
|
|
expect(iterator.current()).toBe(inputRefs[1]);
|
|
|
|
expect(iterator.next().value).toBe(inputRefs[2]);
|
|
expect(iterator.current()).toBe(inputRefs[2]);
|
|
});
|
|
|
|
it('returns the same thing returned by the previous next() call ' +
|
|
'with partial segments', () => {
|
|
const index = new shaka.media.SegmentIndex(inputRefsWithPartial);
|
|
|
|
// const index = new shaka.media.SegmentIndex(inputRefs);
|
|
const iterator = index[Symbol.iterator]();
|
|
|
|
expect(iterator.next().value).toBe(inputRefsWithPartial[0]);
|
|
expect(iterator.current()).toBe(inputRefsWithPartial[0]);
|
|
expect(iterator.next().value).toBe(partialRefs1[0]);
|
|
expect(iterator.current()).toBe(partialRefs1[0]);
|
|
expect(iterator.next().value).toBe(partialRefs1[1]);
|
|
expect(iterator.current()).toBe(partialRefs1[1]);
|
|
expect(iterator.next().value).toBe(partialRefs2[0]);
|
|
expect(iterator.current()).toBe(partialRefs2[0]);
|
|
});
|
|
});
|
|
});
|
|
|
|
describe('MetaSegmentIndex', () => {
|
|
const inputRefs0 = [
|
|
makeReference(uri(0), 0, 10),
|
|
makeReference(uri(1), 10, 20),
|
|
makeReference(uri(2), 20, 30),
|
|
];
|
|
const inputRefs1 = [
|
|
makeReference(uri(3), 30, 40),
|
|
makeReference(uri(4), 40, 50),
|
|
makeReference(uri(5), 50, 60),
|
|
];
|
|
const inputRefs2 = [
|
|
makeReference(uri(6), 60, 70),
|
|
makeReference(uri(7), 70, 80),
|
|
makeReference(uri(8), 80, 90),
|
|
];
|
|
|
|
/** @type {!shaka.media.SegmentIndex} */
|
|
let index0;
|
|
/** @type {!shaka.media.SegmentIndex} */
|
|
let index1;
|
|
/** @type {!shaka.media.SegmentIndex} */
|
|
let index2;
|
|
/** @type {!shaka.media.MetaSegmentIndex} */
|
|
let metaIndex;
|
|
|
|
beforeEach(() => {
|
|
// Make sure each index has a _copy_ of the input refs, so that the
|
|
// original arrays are never modified.
|
|
index0 = new shaka.media.SegmentIndex(inputRefs0.slice());
|
|
index1 = new shaka.media.SegmentIndex(inputRefs1.slice());
|
|
index2 = new shaka.media.SegmentIndex(inputRefs2.slice());
|
|
metaIndex = new shaka.media.MetaSegmentIndex();
|
|
});
|
|
|
|
it('combines the contents of several SegmentIndexes', () => {
|
|
metaIndex.appendSegmentIndex(index0);
|
|
expect(metaIndex.find(0)).toBe(0);
|
|
expect(metaIndex.find(10)).toBe(1);
|
|
expect(metaIndex.find(20)).toBe(2);
|
|
expect(metaIndex.find(30)).toBe(null);
|
|
expect(Array.from(metaIndex)).toEqual(inputRefs0);
|
|
|
|
metaIndex.appendSegmentIndex(index1);
|
|
expect(metaIndex.find(0)).toBe(0);
|
|
expect(metaIndex.find(10)).toBe(1);
|
|
expect(metaIndex.find(20)).toBe(2);
|
|
expect(metaIndex.find(30)).toBe(3);
|
|
expect(metaIndex.find(40)).toBe(4);
|
|
expect(metaIndex.find(50)).toBe(5);
|
|
expect(metaIndex.find(60)).toBe(null);
|
|
expect(Array.from(metaIndex)).toEqual(inputRefs0.concat(inputRefs1));
|
|
|
|
metaIndex.appendSegmentIndex(index2);
|
|
expect(metaIndex.find(0)).toBe(0);
|
|
expect(metaIndex.find(10)).toBe(1);
|
|
expect(metaIndex.find(20)).toBe(2);
|
|
expect(metaIndex.find(30)).toBe(3);
|
|
expect(metaIndex.find(40)).toBe(4);
|
|
expect(metaIndex.find(50)).toBe(5);
|
|
expect(metaIndex.find(60)).toBe(6);
|
|
expect(metaIndex.find(70)).toBe(7);
|
|
expect(metaIndex.find(80)).toBe(8);
|
|
expect(metaIndex.find(90)).toBe(null);
|
|
expect(Array.from(metaIndex)).toEqual(
|
|
inputRefs0.concat(inputRefs1, inputRefs2));
|
|
});
|
|
|
|
it('updates through merge', () => {
|
|
metaIndex.appendSegmentIndex(index0);
|
|
metaIndex.appendSegmentIndex(index1);
|
|
expect(Array.from(metaIndex)).toEqual(inputRefs0.concat(inputRefs1));
|
|
|
|
index1.merge(inputRefs2);
|
|
expect(Array.from(metaIndex)).toEqual(
|
|
inputRefs0.concat(inputRefs1, inputRefs2));
|
|
});
|
|
|
|
it('tracks evictions with stable positions', () => {
|
|
metaIndex.appendSegmentIndex(index0);
|
|
metaIndex.appendSegmentIndex(index1);
|
|
metaIndex.appendSegmentIndex(index2);
|
|
const allRefs = inputRefs0.concat(inputRefs1, inputRefs2);
|
|
|
|
expect(metaIndex.find(0)).toBe(0);
|
|
expect(metaIndex.find(10)).toBe(1);
|
|
expect(metaIndex.find(20)).toBe(2);
|
|
expect(metaIndex.find(30)).toBe(3);
|
|
expect(metaIndex.find(40)).toBe(4);
|
|
expect(metaIndex.find(50)).toBe(5);
|
|
expect(metaIndex.find(60)).toBe(6);
|
|
expect(metaIndex.find(70)).toBe(7);
|
|
expect(metaIndex.find(80)).toBe(8);
|
|
expect(metaIndex.find(90)).toBe(null);
|
|
expect(Array.from(metaIndex)).toEqual(allRefs);
|
|
|
|
index0.evict(25);
|
|
index1.evict(25);
|
|
index2.evict(25);
|
|
expect(metaIndex.find(20)).toBe(2);
|
|
expect(metaIndex.find(30)).toBe(3);
|
|
expect(metaIndex.find(40)).toBe(4);
|
|
expect(metaIndex.find(50)).toBe(5);
|
|
expect(metaIndex.find(60)).toBe(6);
|
|
expect(metaIndex.find(70)).toBe(7);
|
|
expect(metaIndex.find(80)).toBe(8);
|
|
expect(metaIndex.find(90)).toBe(null);
|
|
expect(Array.from(metaIndex)).toEqual(allRefs.slice(2));
|
|
|
|
index0.evict(45);
|
|
index1.evict(45);
|
|
index2.evict(45);
|
|
expect(metaIndex.find(40)).toBe(4);
|
|
expect(metaIndex.find(50)).toBe(5);
|
|
expect(metaIndex.find(60)).toBe(6);
|
|
expect(metaIndex.find(70)).toBe(7);
|
|
expect(metaIndex.find(80)).toBe(8);
|
|
expect(metaIndex.find(90)).toBe(null);
|
|
expect(Array.from(metaIndex)).toEqual(allRefs.slice(4));
|
|
});
|
|
|
|
it('evicts empty SegmentIndexes when calling evictEmpty', () => {
|
|
const release0 = spyOn(index0, 'release');
|
|
const release1 = spyOn(index1, 'release');
|
|
const release2 = spyOn(index2, 'release');
|
|
metaIndex.appendSegmentIndex(index0);
|
|
metaIndex.appendSegmentIndex(index1);
|
|
metaIndex.appendSegmentIndex(index2);
|
|
expect(Array.from(metaIndex)).toEqual(
|
|
inputRefs0.concat(inputRefs1, inputRefs2));
|
|
expect(metaIndex.getNumEvicted()).toBe(0);
|
|
metaIndex.evict(75);
|
|
expect(Array.from(metaIndex)).toEqual(inputRefs2.slice(1));
|
|
expect(release0).toHaveBeenCalled();
|
|
expect(release1).toHaveBeenCalled();
|
|
expect(release2).not.toHaveBeenCalled();
|
|
expect(metaIndex.getNumEvicted()).toBe(6);
|
|
});
|
|
|
|
it('updates through updateEvery', async () => {
|
|
metaIndex.appendSegmentIndex(index0);
|
|
metaIndex.appendSegmentIndex(index1);
|
|
|
|
/** @type {!Array<!shaka.media.SegmentReference>} */
|
|
const oldRefs = inputRefs0.concat(inputRefs1);
|
|
|
|
// Make a copy of inputRefs2 so we don't modify the original.
|
|
/** @type {!Array<!shaka.media.SegmentReference>} */
|
|
const newRefs = inputRefs2.slice();
|
|
|
|
expect(Array.from(metaIndex)).toEqual(oldRefs);
|
|
|
|
// Every 0.1 seconds, return the next new ref.
|
|
const done = new Promise((resolve, reject) => {
|
|
index1.updateEvery(0.1, () => {
|
|
if (newRefs.length == 0) {
|
|
resolve();
|
|
}
|
|
return [newRefs.shift()];
|
|
});
|
|
});
|
|
|
|
// Wait for the new refs to be appended.
|
|
await done;
|
|
|
|
expect(Array.from(metaIndex)).toEqual(oldRefs.concat(inputRefs2));
|
|
});
|
|
|
|
it('can iterate through the indexes', () => {
|
|
metaIndex.appendSegmentIndex(index0);
|
|
metaIndex.appendSegmentIndex(index1);
|
|
metaIndex.appendSegmentIndex(index2);
|
|
|
|
const loopedIndexes = [];
|
|
metaIndex.forEachIndex((index) => {
|
|
loopedIndexes.push(index);
|
|
});
|
|
|
|
expect(loopedIndexes).toEqual([index0, index1, index2]);
|
|
});
|
|
|
|
it('can get continuity timeline for a given time for TimelineSegmentIndex',
|
|
() => {
|
|
const release0 = spyOn(index0, 'continuityTimeline')
|
|
.and.returnValue(0);
|
|
const release1 = spyOn(index1, 'continuityTimeline')
|
|
.and.returnValue(1);
|
|
const release2 = spyOn(index2, 'continuityTimeline')
|
|
.and.returnValue(0);
|
|
metaIndex.appendSegmentIndex(index0);
|
|
metaIndex.appendSegmentIndex(index1);
|
|
metaIndex.appendSegmentIndex(index2);
|
|
|
|
expect(metaIndex.getTimelineForTime(1)).toBe(0);
|
|
expect(metaIndex.getTimelineForTime(29)).toBe(0);
|
|
expect(metaIndex.getTimelineForTime(31)).toBe(1);
|
|
expect(metaIndex.getTimelineForTime(61)).toBe(0);
|
|
expect(metaIndex.getTimelineForTime(91)).toBe(-1);
|
|
|
|
expect(release0).toHaveBeenCalled();
|
|
expect(release1).toHaveBeenCalled();
|
|
expect(release2).toHaveBeenCalled();
|
|
});
|
|
|
|
it('return -1 for continuity timeline if not TimelineSegmentIndex', () => {
|
|
metaIndex.appendSegmentIndex(index0);
|
|
metaIndex.appendSegmentIndex(index1);
|
|
metaIndex.appendSegmentIndex(index2);
|
|
|
|
expect(metaIndex.getTimelineForTime(1)).toBe(-1);
|
|
expect(metaIndex.getTimelineForTime(29)).toBe(-1);
|
|
expect(metaIndex.getTimelineForTime(31)).toBe(-1);
|
|
expect(metaIndex.getTimelineForTime(61)).toBe(-1);
|
|
});
|
|
});
|
|
|
|
/**
|
|
* Creates a URI string.
|
|
*
|
|
* @param {number} x
|
|
* @return {string}
|
|
*/
|
|
function uri(x) {
|
|
return 'http://example.com/video_' + x + '.m4s';
|
|
}
|
|
|
|
/**
|
|
* Creates a real SegmentReference. This is distinct from the fake ones used
|
|
* in ManifestParser tests because it can be on the left-hand side of an
|
|
* expect(). You can't expect jasmine.any(Number) to equal
|
|
* jasmine.any(Number). :-(
|
|
*
|
|
* @param {string} uri
|
|
* @param {number} startTime
|
|
* @param {number} endTime
|
|
* @param {!Array<!shaka.media.SegmentReference>=} partialReferences
|
|
* @param {?shaka.extern.aesKey=} aesKey
|
|
* @return {shaka.media.SegmentReference}
|
|
*/
|
|
function makeReference(uri, startTime, endTime, partialReferences = [],
|
|
aesKey = null) {
|
|
return new shaka.media.SegmentReference(
|
|
startTime,
|
|
endTime,
|
|
/* getUris= */ () => [uri],
|
|
/* startByte= */ 0,
|
|
/* endByte= */ null,
|
|
/* initSegmentReference= */ null,
|
|
/* timestampOffset= */ 0,
|
|
/* appendWindowStart= */ 0,
|
|
/* appendWindowEnd= */ Infinity,
|
|
/* partialReferences= */ partialReferences,
|
|
/* tilesLayout= */ undefined,
|
|
/* tileDuration= */ undefined,
|
|
/* syncTime= */ undefined,
|
|
/* status= */ undefined,
|
|
/* aesKey= */ aesKey,
|
|
/* allPartialSegments= */ partialReferences.length > 0);
|
|
}
|
|
});
|