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mp4_ttml_parser_unit.js
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/
mp4_ttml_parser_unit.js
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/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.require('shaka.test.TtmlUtils');
goog.require('shaka.test.Util');
goog.require('shaka.text.Mp4TtmlParser');
goog.require('shaka.util.BufferUtils');
goog.require('shaka.util.Error');
describe('Mp4TtmlParser', () => {
const ttmlInitSegmentUri = '/base/test/test/assets/ttml-init.mp4';
const ttmlSegmentUri = '/base/test/test/assets/ttml-segment.mp4';
const ttmlSegmentMultipleMDATUri =
'/base/test/test/assets/ttml-segment-multiplemdat.mp4';
const audioInitSegmentUri = '/base/test/test/assets/sintel-audio-init.mp4';
/** @type {!Uint8Array} */
let ttmlInitSegment;
/** @type {!Uint8Array} */
let ttmlSegment;
/** @type {!Uint8Array} */
let ttmlSegmentMultipleMDAT;
/** @type {!Uint8Array} */
let audioInitSegment;
beforeAll(async () => {
const responses = await Promise.all([
shaka.test.Util.fetch(ttmlInitSegmentUri),
shaka.test.Util.fetch(ttmlSegmentUri),
shaka.test.Util.fetch(ttmlSegmentMultipleMDATUri),
shaka.test.Util.fetch(audioInitSegmentUri),
]);
ttmlInitSegment = shaka.util.BufferUtils.toUint8(responses[0]);
ttmlSegment = shaka.util.BufferUtils.toUint8(responses[1]);
ttmlSegmentMultipleMDAT = shaka.util.BufferUtils.toUint8(responses[2]);
audioInitSegment = shaka.util.BufferUtils.toUint8(responses[3]);
});
it('parses init segment', () => {
new shaka.text.Mp4TtmlParser().parseInit(ttmlInitSegment);
});
it('handles media segments with multiple mdats', () => {
const parser = new shaka.text.Mp4TtmlParser();
parser.parseInit(ttmlInitSegment);
const time = {periodStart: 0, segmentStart: 0, segmentEnd: 0, vttOffset: 0};
const ret = parser.parseMedia(ttmlSegmentMultipleMDAT, time);
// Bodies.
expect(ret.length).toBe(2);
// Divs.
expect(ret[0].nestedCues.length).toBe(1);
expect(ret[1].nestedCues.length).toBe(1);
// Cues.
expect(ret[0].nestedCues[0].nestedCues.length).toBe(10);
expect(ret[1].nestedCues[0].nestedCues.length).toBe(10);
});
it('accounts for offset', () => {
const time1 =
{periodStart: 0, segmentStart: 0, segmentEnd: 0, vttOffset: 0};
const time2 =
{periodStart: 7, segmentStart: 0, segmentEnd: 0, vttOffset: 7};
const parser = new shaka.text.Mp4TtmlParser();
parser.parseInit(ttmlInitSegment);
const ret1 = parser.parseMedia(ttmlSegment, time1);
expect(ret1.length).toBeGreaterThan(0);
const ret2 = parser.parseMedia(ttmlSegment, time2);
expect(ret2.length).toBeGreaterThan(0);
expect(ret2[0].startTime).toBe(ret1[0].startTime + 7);
expect(ret2[0].endTime).toBe(ret1[0].endTime + 7);
});
it('rejects init segment with no ttml', () => {
const error = shaka.test.Util.jasmineError(new shaka.util.Error(
shaka.util.Error.Severity.CRITICAL,
shaka.util.Error.Category.TEXT,
shaka.util.Error.Code.INVALID_MP4_TTML));
expect(() => new shaka.text.Mp4TtmlParser().parseInit(audioInitSegment))
.toThrow(error);
});
it('parses media segment', () => {
const cues = [
{
startTime: 23,
endTime: 24.5,
payload: 'You\'re a jerk, Thom.',
},
{
startTime: 25,
endTime: 27,
payload: 'Look Celia, we have to follow our passions;',
},
{
startTime: 27,
endTime: 30.5,
nestedCues: [{
payload: '...you have your robotics, and I',
}, {
lineBreak: true,
}, {
payload: 'just want to be awesome in space.',
}],
},
{
startTime: 30.8,
endTime: 34,
nestedCues: [{
payload: 'Why don\'t you just admit that',
}, {
lineBreak: true,
}, {
payload: 'you\'re freaked out by my robot hand?',
}],
},
{
startTime: 34.5,
endTime: 36,
payload: 'I\'m not freaked out by- it\'s...',
},
{
startTime: 37,
endTime: 38,
payload: '...alright! Fine!',
},
{
startTime: 38,
endTime: 41,
nestedCues: [{
payload: 'I\'m freaked out! I have nightmares',
}, {
lineBreak: true,
}, {
payload: 'that I\'m being chased...',
}],
},
{
startTime: 41,
endTime: 42,
payload: '...by these giant robotic claws of death...',
},
{
startTime: 42.2,
endTime: 45,
nestedCues: [{
payload: '"Fourty years later"',
}, {
lineBreak: true,
}, {
payload: 'Whatever, Thom. We\'re done.',
}],
},
{
startTime: 50,
endTime: 53.5,
payload: 'Robot\'s memory synced and locked!',
},
];
const parser = new shaka.text.Mp4TtmlParser();
parser.parseInit(ttmlInitSegment);
const time = {periodStart: 0, segmentStart: 0, segmentEnd: 0, vttOffset: 0};
const result = parser.parseMedia(ttmlSegment, time);
shaka.test.TtmlUtils.verifyHelper(
cues, result, {startTime: 23, endTime: 53.5});
});
});