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mp4_vtt_parser_unit.js
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mp4_vtt_parser_unit.js
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/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.require('shaka.test.Util');
goog.require('shaka.text.Cue');
goog.require('shaka.text.Mp4VttParser');
goog.require('shaka.util.BufferUtils');
goog.require('shaka.util.Error');
describe('Mp4VttParser', () => {
const vttInitSegmentUri = '/base/test/test/assets/vtt-init.mp4';
const vttSegmentUri = '/base/test/test/assets/vtt-segment.mp4';
const vttSegmentMultiPayloadUri =
'/base/test/test/assets/vtt-segment-multi-payload.mp4';
const vttSegSettingsUri = '/base/test/test/assets/vtt-segment-settings.mp4';
const vttSegNoDurationUri =
'/base/test/test/assets/vtt-segment-no-duration.mp4';
const audioInitSegmentUri = '/base/test/test/assets/sintel-audio-init.mp4';
/** @type {!Uint8Array} */
let vttInitSegment;
/** @type {!Uint8Array} */
let vttSegment;
/** @type {!Uint8Array} */
let vttSegmentMultiPayload;
/** @type {!Uint8Array} */
let vttSegSettings;
/** @type {!Uint8Array} */
let vttSegNoDuration;
/** @type {!Uint8Array} */
let audioInitSegment;
beforeAll(async () => {
const responses = await Promise.all([
shaka.test.Util.fetch(vttInitSegmentUri),
shaka.test.Util.fetch(vttSegmentUri),
shaka.test.Util.fetch(vttSegmentMultiPayloadUri),
shaka.test.Util.fetch(vttSegSettingsUri),
shaka.test.Util.fetch(vttSegNoDurationUri),
shaka.test.Util.fetch(audioInitSegmentUri),
]);
vttInitSegment = shaka.util.BufferUtils.toUint8(responses[0]);
vttSegment = shaka.util.BufferUtils.toUint8(responses[1]);
vttSegmentMultiPayload = shaka.util.BufferUtils.toUint8(responses[2]);
vttSegSettings = shaka.util.BufferUtils.toUint8(responses[3]);
vttSegNoDuration = shaka.util.BufferUtils.toUint8(responses[4]);
audioInitSegment = shaka.util.BufferUtils.toUint8(responses[5]);
});
it('parses init segment', () => {
new shaka.text.Mp4VttParser().parseInit(vttInitSegment);
});
it('parses media segment', () => {
const cues = [
{
startTime: 111.8,
endTime: 115.8,
payload: 'It has shed much innocent blood.\n',
},
{
startTime: 118,
endTime: 120,
payload:
'You\'re a fool for traveling alone,\nso completely unprepared.\n',
},
];
const parser = new shaka.text.Mp4VttParser();
parser.parseInit(vttInitSegment);
const time = {periodStart: 0, segmentStart: 0, segmentEnd: 0, vttOffset: 0};
const result = parser.parseMedia(vttSegment, time);
verifyHelper(cues, result);
});
it('plays multiple payloads at one time if specified by size', () => {
const cues = [
{
startTime: 110,
endTime: 113,
payload: 'Hello',
},
// This cue is part of the same presentation as the previous one, so it
// shares the same start time and duration.
{
startTime: 110,
endTime: 113,
payload: 'and',
},
{
startTime: 113,
endTime: 116.276,
payload: 'goodbye',
},
];
const parser = new shaka.text.Mp4VttParser();
parser.parseInit(vttInitSegment);
const time = {periodStart: 0, segmentStart: 0, segmentEnd: 0, vttOffset: 0};
const result = parser.parseMedia(vttSegmentMultiPayload, time);
verifyHelper(cues, result);
});
it('parses media segment containing settings', () => {
const Cue = shaka.text.Cue;
const cues = [
{
startTime: 111.8,
endTime: 115.8,
payload: 'It has shed much innocent blood.\n',
textAlign: 'right',
size: 50,
position: 10,
},
{
startTime: 118,
endTime: 120,
payload:
'You\'re a fool for traveling alone,\nso completely unprepared.\n',
writingMode: Cue.writingMode.VERTICAL_LEFT_TO_RIGHT,
line: 1,
},
];
const parser = new shaka.text.Mp4VttParser();
parser.parseInit(vttInitSegment);
const time = {periodStart: 0, segmentStart: 0, segmentEnd: 0, vttOffset: 0};
const result = parser.parseMedia(vttSegSettings, time);
verifyHelper(cues, result);
});
it('parses media segments without a sample duration', () => {
// Regression test for https://github.com/shaka-project/shaka-player/issues/919
const cues = [
{startTime: 10, endTime: 11, payload: 'cue 10'},
{startTime: 11, endTime: 12, payload: 'cue 11'},
{startTime: 12, endTime: 13, payload: 'cue 12'},
{startTime: 13, endTime: 14, payload: 'cue 13'},
{startTime: 14, endTime: 15, payload: 'cue 14'},
{startTime: 15, endTime: 16, payload: 'cue 15'},
{startTime: 16, endTime: 17, payload: 'cue 16'},
{startTime: 17, endTime: 18, payload: 'cue 17'},
{startTime: 18, endTime: 19, payload: 'cue 18'},
{startTime: 19, endTime: 20, payload: 'cue 19'},
];
const parser = new shaka.text.Mp4VttParser();
parser.parseInit(vttInitSegment);
const time = {periodStart: 0, segmentStart: 0, segmentEnd: 0, vttOffset: 0};
const result = parser.parseMedia(vttSegNoDuration, time);
verifyHelper(cues, result);
});
it('accounts for offset', () => {
const cues = [
{
startTime: 121.8,
endTime: 125.8,
payload: 'It has shed much innocent blood.\n',
},
{
startTime: 128,
endTime: 130,
payload:
'You\'re a fool for traveling alone,\nso completely unprepared.\n',
},
];
const parser = new shaka.text.Mp4VttParser();
parser.parseInit(vttInitSegment);
const time =
{periodStart: 10, segmentStart: 0, segmentEnd: 0, vttOffset: 10};
const result = parser.parseMedia(vttSegment, time);
verifyHelper(cues, result);
});
it('rejects init segment with no vtt', () => {
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_VTT));
expect(() => new shaka.text.Mp4VttParser().parseInit(audioInitSegment))
.toThrow(error);
});
function verifyHelper(/** !Array */ expected, /** !Array */ actual) {
expect(actual).toEqual(expected.map((c) => jasmine.objectContaining(c)));
}
});