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periods_unit.js
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periods_unit.js
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/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.require('shaka.test.ManifestGenerator');
goog.require('shaka.util.ManifestParserUtils');
goog.require('shaka.util.PeriodCombiner');
describe('PeriodCombiner', () => {
// These test cases don't really read well as "it" statements. Phrasing them
// that way would make the names very long, so here we break with that
// convention.
/** @type {shaka.util.PeriodCombiner} */
let combiner;
beforeEach(() => {
combiner = new shaka.util.PeriodCombiner();
});
afterEach(() => {
combiner.release();
});
it('Ad insertion - join during main content', async () => {
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: 'main',
videoStreams: [
makeVideoStream(1080),
makeVideoStream(720),
makeVideoStream(480),
],
audioStreams: [
makeAudioStream('en', /* channels= */ 6),
makeAudioStream('en', /* channels= */ 2),
],
textStreams: [],
imageStreams: [],
},
{
id: 'ad',
videoStreams: [
makeVideoStream(480),
],
audioStreams: [
makeAudioStream('en', /* channels= */ 2),
],
textStreams: [],
imageStreams: [],
},
];
// Start with the first period only.
await combiner.combinePeriods(periods.slice(0, 1), /* isDynamic= */ true);
expect(combiner.getVariants()).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(1080, 'en', /* channels= */ 6),
makeAVVariant(1080, 'en', /* channels= */ 2),
makeAVVariant(720, 'en', /* channels= */ 6),
makeAVVariant(720, 'en', /* channels= */ 2),
makeAVVariant(480, 'en', /* channels= */ 6),
makeAVVariant(480, 'en', /* channels= */ 2),
]));
// Add the second period.
await combiner.combinePeriods(periods, /* isDynamic= */ true);
const variants = combiner.getVariants();
expect(variants).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(1080, 'en', /* channels= */ 6),
makeAVVariant(1080, 'en', /* channels= */ 2),
makeAVVariant(720, 'en', /* channels= */ 6),
makeAVVariant(720, 'en', /* channels= */ 2),
makeAVVariant(480, 'en', /* channels= */ 6),
makeAVVariant(480, 'en', /* channels= */ 2),
]));
const h1080Surround = variants.find(
(v) => v.video.height == 1080 && v.audio.channelsCount == 6);
const h720Surround = variants.find(
(v) => v.video.height == 720 && v.audio.channelsCount == 6);
const h480Surround = variants.find(
(v) => v.video.height == 480 && v.audio.channelsCount == 6);
const h1080Stereo = variants.find(
(v) => v.video.height == 1080 && v.audio.channelsCount == 2);
const h720Stereo = variants.find(
(v) => v.video.height == 720 && v.audio.channelsCount == 2);
const h480Stereo = variants.find(
(v) => v.video.height == 480 && v.audio.channelsCount == 2);
// We can use the originalId field to see what each track is composed of.
expect(h1080Surround.video.originalId).toBe('1080,480');
expect(h1080Surround.audio.originalId).toBe('en-6c,en');
expect(h720Surround.video.originalId).toBe('720,480');
expect(h720Surround.audio.originalId).toBe('en-6c,en');
expect(h480Surround.video.originalId).toBe('480,480');
expect(h480Surround.audio.originalId).toBe('en-6c,en');
expect(h1080Stereo.video.originalId).toBe('1080,480');
expect(h1080Stereo.audio.originalId).toBe('en,en');
expect(h720Stereo.video.originalId).toBe('720,480');
expect(h720Stereo.audio.originalId).toBe('en,en');
expect(h480Stereo.video.originalId).toBe('480,480');
expect(h480Stereo.audio.originalId).toBe('en,en');
});
it('Ad insertion - join during ad', async () => {
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: 'ad',
videoStreams: [
makeVideoStream(480),
],
audioStreams: [
makeAudioStream('en', /* channels= */ 2),
],
textStreams: [],
imageStreams: [],
},
{
id: 'main',
videoStreams: [
makeVideoStream(1080),
makeVideoStream(480),
makeVideoStream(720),
],
audioStreams: [
makeAudioStream('en', /* channels= */ 6),
makeAudioStream('en', /* channels= */ 2),
],
textStreams: [],
imageStreams: [],
},
];
// Start with the first period only.
await combiner.combinePeriods(periods.slice(0, 1), /* isDynamic= */ true);
expect(combiner.getVariants()).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(480, 'en', /* channels= */ 2),
]));
// Add the second period.
await combiner.combinePeriods(periods, /* isDynamic= */ true);
const variants = combiner.getVariants();
expect(variants).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(1080, 'en', /* channels= */ 6),
makeAVVariant(1080, 'en', /* channels= */ 2),
makeAVVariant(720, 'en', /* channels= */ 6),
makeAVVariant(720, 'en', /* channels= */ 2),
makeAVVariant(480, 'en', /* channels= */ 6),
makeAVVariant(480, 'en', /* channels= */ 2),
]));
const h1080Surround = variants.find(
(v) => v.video.height == 1080 && v.audio.channelsCount == 6);
const h720Surround = variants.find(
(v) => v.video.height == 720 && v.audio.channelsCount == 6);
const h480Surround = variants.find(
(v) => v.video.height == 480 && v.audio.channelsCount == 6);
const h1080Stereo = variants.find(
(v) => v.video.height == 1080 && v.audio.channelsCount == 2);
const h720Stereo = variants.find(
(v) => v.video.height == 720 && v.audio.channelsCount == 2);
const h480Stereo = variants.find(
(v) => v.video.height == 480 && v.audio.channelsCount == 2);
// We can use the originalId field to see what each track is composed of.
expect(h1080Surround.video.originalId).toBe('480,1080');
expect(h1080Surround.audio.originalId).toBe('en,en-6c');
expect(h720Surround.video.originalId).toBe('480,720');
expect(h720Surround.audio.originalId).toBe('en,en-6c');
expect(h480Surround.video.originalId).toBe('480,480');
expect(h480Surround.audio.originalId).toBe('en,en-6c');
expect(h1080Stereo.video.originalId).toBe('480,1080');
expect(h1080Stereo.audio.originalId).toBe('en,en');
expect(h720Stereo.video.originalId).toBe('480,720');
expect(h720Stereo.audio.originalId).toBe('en,en');
expect(h480Stereo.video.originalId).toBe('480,480');
expect(h480Stereo.audio.originalId).toBe('en,en');
});
it('Ad insertion - smaller ad, res not found in main content', async () => {
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: '1',
videoStreams: [
makeVideoStream(1080),
makeVideoStream(720),
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [],
imageStreams: [],
},
{
id: '2',
videoStreams: [
makeVideoStream(480),
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [],
imageStreams: [],
},
];
// Start with the first period only.
await combiner.combinePeriods(periods.slice(0, 1), /* isDynamic= */ true);
expect(combiner.getVariants()).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(1080, 'en'),
makeAVVariant(720, 'en'),
]));
// Add the second period.
await combiner.combinePeriods(periods, /* isDynamic= */ true);
const variants = combiner.getVariants();
expect(variants).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(1080, 'en'),
makeAVVariant(720, 'en'),
]));
// We can use the originalId field to see what each track is composed of.
const h1080 = variants.find((v) => v.video.height == 1080);
const h720 = variants.find((v) => v.video.height == 720);
expect(h1080.video.originalId).toBe('1080,480');
expect(h720.video.originalId).toBe('720,480');
});
it('Ad insertion - larger ad, res not found in main content', async () => {
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: '1',
videoStreams: [
makeVideoStream(720),
makeVideoStream(480),
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [],
imageStreams: [],
},
{
id: '2',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [],
imageStreams: [],
},
];
// Start with the first period only.
await combiner.combinePeriods(periods.slice(0, 1), /* isDynamic= */ true);
expect(combiner.getVariants()).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(720, 'en'),
makeAVVariant(480, 'en'),
]));
// Add the second period.
await combiner.combinePeriods(periods, /* isDynamic= */ true);
const variants = combiner.getVariants();
expect(variants.length).toBe(2);
// We can use the originalId field to see what each track is composed of.
const originalIds = variants.map((v) => v.video.originalId);
expect(originalIds).toEqual(jasmine.arrayWithExactContents([
'720,1080',
'480,1080',
]));
});
it('Language changes during and after an ad', async () => {
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: 'show1',
videoStreams: [
makeVideoStream(1080),
makeVideoStream(480),
],
audioStreams: [
makeAudioStream('es', /* channels= */ 2, /* primary= */ true),
makeAudioStream('fr', /* channels= */ 2, /* primary= */ false),
],
textStreams: [],
imageStreams: [],
},
{
id: 'ad',
videoStreams: [
makeVideoStream(480),
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [],
imageStreams: [],
},
{
id: 'show2',
videoStreams: [
makeVideoStream(1080),
makeVideoStream(480),
],
audioStreams: [
makeAudioStream('es', /* channels= */ 2, /* primary= */ false),
makeAudioStream('fr', /* channels= */ 2, /* primary= */ true),
],
textStreams: [],
imageStreams: [],
},
];
await combiner.combinePeriods(periods, /* isDynamic= */ false);
const variants = combiner.getVariants();
expect(variants).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(1080, 'es'),
makeAVVariant(480, 'es'),
makeAVVariant(1080, 'en'),
makeAVVariant(480, 'en'),
makeAVVariant(1080, 'fr'),
makeAVVariant(480, 'fr'),
]));
// We can use the originalId field to see what each track is composed of.
// The Spanish track is primary in the first period and has English 480p in
// the middle period.
const spanish = variants.find(
(v) => v.video.height == 1080 && v.language == 'es');
expect(spanish.audio.originalId).toBe('es*,en,es');
expect(spanish.video.originalId).toBe('1080,480,1080');
// The French track is primary in the last period and has English 480p in
// the middle period.
const french = variants.find(
(v) => v.video.height == 1080 && v.language == 'fr');
expect(french.audio.originalId).toBe('fr,en,fr*');
expect(french.video.originalId).toBe('1080,480,1080');
// Because there's no English in the first or last periods, the English
// track follows the "primary" language in those periods.
const english = variants.find(
(v) => v.video.height == 1080 && v.language == 'en');
expect(english.audio.originalId).toBe('es*,en,fr*');
expect(english.video.originalId).toBe('1080,480,1080');
});
it('VOD playlist of completely unrelated periods', async () => {
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: 'show1',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStream('es'),
],
textStreams: [],
imageStreams: [],
},
{
id: 'show2',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [],
imageStreams: [],
},
];
await combiner.combinePeriods(periods, /* isDynamic= */ false);
const variants = combiner.getVariants();
expect(variants).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(1080, 'es'),
makeAVVariant(1080, 'en'),
]));
// We can use the originalId field to see what each track is composed of.
// Both tracks are composed of the same things.
const spanish = variants.find(
(v) => v.video.height == 1080 && v.language == 'es');
const english = variants.find(
(v) => v.video.height == 1080 && v.language == 'en');
expect(spanish.audio.originalId).toBe('es,en');
expect(english.audio.originalId).toBe('es,en');
});
it('Multiple representations of the same resolution', async () => {
/** @type {shaka.extern.Stream} */
const video1 = makeVideoStream(480);
video1.bandwidth = 1;
/** @type {shaka.extern.Stream} */
const video2 = makeVideoStream(480);
video2.bandwidth = 2;
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: '1',
videoStreams: [
video1,
video2,
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [],
imageStreams: [],
},
];
await combiner.combinePeriods(periods, /* isDynamic= */ true);
const variants = combiner.getVariants();
expect(variants).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(480, 'en', /* channels= */ 2),
makeAVVariant(480, 'en', /* channels= */ 2),
]));
const lowBandwidth = variants.find(
(v) => v.video.height == 480 && v.bandwidth == 1);
const highBandwidth = variants.find(
(v) => v.video.height == 480 && v.bandwidth == 2);
expect(lowBandwidth.video.originalId).toBe('480');
expect(highBandwidth.video.originalId).toBe('480');
});
it('Filters out duplicate streams', async () => {
// v1 and v3 are duplicates
const v1 = makeVideoStream(1280);
v1.frameRate = 30000/1001;
v1.originalId = 'v1';
v1.bandwidth = 6200000;
const v2 = makeVideoStream(1920);
v2.frameRate = 30000/1001;
v2.originalId = 'v2';
v2.bandwidth = 8000000;
const v3 = makeVideoStream(1280);
v3.frameRate = 30000/1001;
v3.originalId = 'v3';
v3.bandwidth = 6200000;
// a1 and a2 are duplicates.
const a1 = makeAudioStream('en', /* channels= */ 2);
a1.originalId = 'a1';
a1.bandwidth = 65106;
a1.roles = ['role1', 'role2'];
a1.codecs = 'mp4a.40.2';
const a2 = makeAudioStream('en', /* channels= */ 2);
a2.originalId = 'a2';
a2.bandwidth = 65106;
a2.roles = ['role1', 'role2'];
a2.codecs = 'mp4a.40.2';
const a3 = makeAudioStream('en', /* channels= */ 2);
a3.originalId = 'a3';
a3.bandwidth = 97065;
a3.roles = ['role1', 'role2'];
a2.codecs = 'mp4a.40.2';
// a4 has a different label from a3, and should not
// be filtered out.
const a4 = makeAudioStream('en', /* channels= */ 2);
a4.originalId = 'a4';
a4.bandwidth = 97065;
a4.roles = ['role1', 'role2'];
a4.label = 'Surround';
a4.codecs = 'mp4a.40.2';
// a5 has a different codec from a3, and should not
// be filtered out.
const a5 = makeAudioStream('en', /* channels= */ 2);
a5.originalId = 'a5';
a5.bandwidth = 97065;
a5.roles = ['role1', 'role2'];
a5.codecs = 'ec-3';
// t1 and t3 are duplicates.
const t1 = makeTextStream('en');
t1.originalId = 't1';
t1.roles = ['role1'];
const t2 = makeTextStream('en');
t2.originalId = 't2';
t2.roles = ['role1', 'role2'];
const t3 = makeTextStream('en');
t3.originalId = 't3';
t3.roles = ['role1'];
// i1 and i3 are duplicates.
const i1 = makeImageStream(240);
i1.originalId = 'i1';
const i2 = makeImageStream(480);
i2.originalId = 'i2';
const i3 = makeImageStream(240);
i3.originalId = 'i3';
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: '1',
videoStreams: [
v1,
v2,
v3,
],
audioStreams: [
a1,
a2,
a3,
a4,
a5,
],
textStreams: [
t1,
t2,
t3,
],
imageStreams: [
i1,
i2,
i3,
],
},
];
await combiner.combinePeriods(periods, /* isDynamic= */ true);
const variants = combiner.getVariants();
expect(variants.length).toBe(8);
// v3 should've been filtered out
const videoIds = variants.map((v) => v.video.originalId);
for (const id of videoIds) {
expect(id).not.toBe('v3');
}
// a2 should've been filtered out
const audioIds = variants.map((v) => v.audio.originalId);
for (const id of audioIds) {
expect(id).not.toBe('a2');
}
const textStreams = combiner.getTextStreams();
expect(textStreams.length).toBe(2);
// t3 should've been filtered out
const textIds = textStreams.map((t) => t.originalId);
for (const id of textIds) {
expect(id).not.toBe('t3');
}
const imageStreams = combiner.getImageStreams();
expect(imageStreams.length).toBe(2);
// i3 should've been filtered out
const imageIds = imageStreams.map((i) => i.originalId);
for (const id of imageIds) {
expect(id).not.toBe('i3');
}
});
// Regression test for #3383, where we failed on multi-period content with
// multiple image streams per period.
it('Can handle multiple image streams', async () => {
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: '1',
videoStreams: [
makeVideoStream(1280),
],
audioStreams: [],
textStreams: [],
imageStreams: [
makeImageStream(240),
makeImageStream(480),
],
},
{
id: '2',
videoStreams: [
makeVideoStream(1280),
],
audioStreams: [],
textStreams: [],
imageStreams: [
makeImageStream(240),
makeImageStream(480),
],
},
];
await combiner.combinePeriods(periods, /* isDynamic= */ true);
const imageStreams = combiner.getImageStreams();
expect(imageStreams.length).toBe(2);
const imageIds = imageStreams.map((i) => i.originalId);
expect(imageIds).toEqual([
'240,240',
'480,480',
]);
});
it('handles text track gaps', async () => {
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: '1',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [
makeTextStream('en'),
],
imageStreams: [],
},
{
id: '2',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [
/* No text streams */
],
imageStreams: [],
},
{
id: '3',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [
makeTextStream('en'),
makeTextStream('es'),
],
imageStreams: [],
},
];
await combiner.combinePeriods(periods, /* isDynamic= */ false);
const textStreams = combiner.getTextStreams();
expect(textStreams).toEqual(jasmine.arrayWithExactContents([
jasmine.objectContaining({
language: 'es',
}),
jasmine.objectContaining({
language: 'en',
}),
]));
// We can use the originalId field to see what each track is composed of.
// Both tracks are composed of the same things.
const spanish = textStreams.find((s) => s.language == 'es');
const english = textStreams.find((s) => s.language == 'en');
expect(spanish.originalId).toBe(',,es');
expect(english.originalId).toBe('en,,en');
});
it('handles image track gaps', async () => {
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: '1',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [],
imageStreams: [
makeImageStream(240),
],
},
{
id: '2',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [],
imageStreams: [
/* No image streams in this period */
],
},
{
id: '3',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStream('en'),
],
textStreams: [],
imageStreams: [
makeImageStream(240),
makeImageStream(480),
],
},
];
await combiner.combinePeriods(periods, /* isDynamic= */ false);
const imageStreams = combiner.getImageStreams();
expect(imageStreams).toEqual(jasmine.arrayWithExactContents([
jasmine.objectContaining({
height: 240,
}),
jasmine.objectContaining({
height: 480,
}),
]));
// We can use the originalId field to see what each track is composed of.
const i240 = imageStreams.find((s) => s.height == 240);
const i480 = imageStreams.find((s) => s.height == 480);
expect(i240.originalId).toBe('240,,240');
expect(i480.originalId).toBe('240,,480');
});
it('Disjoint audio channels', async () => {
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: '1',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStream('en', /* channels= */ 6),
],
textStreams: [],
imageStreams: [],
},
{
id: '2',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStream('en', /* channels= */ 2),
],
textStreams: [],
imageStreams: [],
},
];
await combiner.combinePeriods(periods, /* isDynamic= */ false);
const variants = combiner.getVariants();
expect(variants).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(1080, 'en', /* channels= */ 6),
]));
// We can use the originalId field to see what each track is composed of.
// There is only one track. The whole thing gets "upgraded" to 6-channel
// surround.
const audio = variants[0].audio;
expect(audio.originalId).toBe('en-6c,en');
});
it('Disjoint audio sample rates, ascending order', async () => {
const makeAudioStreamWithSampleRate = (rate) => {
const stream = makeAudioStream('en');
stream.audioSamplingRate = rate;
stream.originalId = rate.toString();
return stream;
};
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: '1',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStreamWithSampleRate(48000),
],
textStreams: [],
imageStreams: [],
},
{
id: '2',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStreamWithSampleRate(44100),
],
textStreams: [],
imageStreams: [],
},
];
await combiner.combinePeriods(periods, /* isDynamic= */ false);
const variants = combiner.getVariants();
expect(variants).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(1080, 'en'),
]));
// We can use the originalId field to see what each track is composed of.
// There is only one track.
const audio = variants[0].audio;
expect(audio.audioSamplingRate).toBe(48000);
expect(audio.originalId).toBe('48000,44100');
});
it('Disjoint audio sample rates, descending order', async () => {
const makeAudioStreamWithSampleRate = (rate) => {
const stream = makeAudioStream('en');
stream.audioSamplingRate = rate;
stream.originalId = rate.toString();
return stream;
};
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: '1',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStreamWithSampleRate(44100),
],
textStreams: [],
imageStreams: [],
},
{
id: '2',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
makeAudioStreamWithSampleRate(48000),
],
textStreams: [],
imageStreams: [],
},
];
await combiner.combinePeriods(periods, /* isDynamic= */ false);
const variants = combiner.getVariants();
expect(variants).toEqual(jasmine.arrayWithExactContents([
makeAVVariant(1080, 'en'),
]));
// We can use the originalId field to see what each track is composed of.
// There is only one track.
const audio = variants[0].audio;
expect(audio.audioSamplingRate).toBe(44100);
expect(audio.originalId).toBe('44100,48000');
});
it('ignores newly added codecs', async () => {
const newCodec = makeVideoStream(720);
newCodec.codecs = 'foo.abcd';
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: '1',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [],
textStreams: [],
imageStreams: [],
},
{
id: '2',
videoStreams: [
makeVideoStream(1080),
newCodec,
],
audioStreams: [],
textStreams: [],
imageStreams: [],
},
];
await combiner.combinePeriods(periods, /* isDynamic= */ false);
const variants = combiner.getVariants();
expect(variants.length).toBe(1);
});
it('Matches streams with no roles', async () => {
const stream1 = makeAudioStream('en', /* channels= */ 2);
stream1.originalId = '1';
stream1.bandwidth = 129597;
stream1.codecs = 'mp4a.40.2';
const stream2 = makeAudioStream('en', /* channels= */ 2);
stream2.originalId = '2';
stream2.bandwidth = 129637;
stream2.codecs = 'mp4a.40.2';
stream2.roles = ['description'];
const stream3 = makeAudioStream('en', /* channels= */ 2);
stream3.originalId = '3';
stream3.bandwidth = 131037;
stream3.codecs = 'mp4a.40.2';
const stream4 = makeAudioStream('en', /* channels= */ 2);
stream4.originalId = '4';
stream4.bandwidth = 131034;
stream4.codecs = 'mp4a.40.2';
stream4.roles = ['description'];
/** @type {!Array.<shaka.util.PeriodCombiner.Period>} */
const periods = [
{
id: '0',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
stream1,
stream2,
],
textStreams: [],
imageStreams: [],
},
{
id: '1',
videoStreams: [
makeVideoStream(1080),
],
audioStreams: [
stream3,
stream4,
],
textStreams: [],
imageStreams: [],
},
];
await combiner.combinePeriods(periods, /* isDynamic= */ true);
const variants = combiner.getVariants();
expect(variants.length).toBe(2);
// We can use the originalId field to see what each track is composed of.
const audio1 = variants[0].audio;
expect(audio1.roles).toEqual([]);
expect(audio1.originalId).toBe('1,3');
const audio2 = variants[1].audio;
expect(audio2.roles).toEqual(['description']);
expect(audio2.originalId).toBe('2,4');
});
it('Matches streams with most roles in common', async () => {
const makeAudioStreamWithRoles = (roles) => {
const stream = makeAudioStream('en');
stream.roles = roles;
return stream;
};
const stream1 = makeAudioStreamWithRoles(['role1', 'role2']);