mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-25 17:45:03 +03:00
Timothy Drews
3e300d25ae
The live-edge calculation in PresentationTimeline needs to take into account the duration of the current segment since the current segment is not available until it has ended. To do this we use MPD@maxSegmentDuration when available, and compute our own maxSegmentDuration when it's not (as specified by the DASH spec). Change-Id: Ic5b8478dbbff8eac93cf123a00a8b02db140cf15
263 lines
8.4 KiB
JavaScript
263 lines
8.4 KiB
JavaScript
/**
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* @license
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* Copyright 2016 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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describe('PresentationTimeline', function() {
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var originalDateNow;
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var baseTime;
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beforeEach(function() {
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baseTime = new Date(2015, 11, 30);
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originalDateNow = Date.now;
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Date.now = function() { return baseTime.getTime(); };
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});
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afterEach(function() {
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Date.now = originalDateNow;
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});
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function setElapsed(secondsSinceBaseTime) {
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Date.now = function() {
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return baseTime.getTime() + (secondsSinceBaseTime * 1000);
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};
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}
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describe('getSegmentAvailabilityStart', function() {
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it('returns 0 for VOD', function() {
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setElapsed(0);
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var timeline1 = new shaka.media.PresentationTimeline(
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60, null, null, 10, 0);
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expect(timeline1.getSegmentAvailabilityStart()).toBe(0);
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setElapsed(0);
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var timeline2 = new shaka.media.PresentationTimeline(
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Number.POSITIVE_INFINITY, null, null, 10, 0);
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expect(timeline2.getSegmentAvailabilityStart()).toBe(0);
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});
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it('returns the correct time for live without duration', function() {
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setElapsed(0);
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var timeline = new shaka.media.PresentationTimeline(
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Number.POSITIVE_INFINITY, Date.now() / 1000.0, 20, 10, 0);
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expect(timeline.getSegmentAvailabilityStart()).toBe(0);
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setElapsed(29);
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expect(timeline.getSegmentAvailabilityStart()).toBe(0);
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setElapsed(30);
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expect(timeline.getSegmentAvailabilityStart()).toBe(0);
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setElapsed(31);
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expect(timeline.getSegmentAvailabilityStart()).toBe(1);
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setElapsed(69);
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expect(timeline.getSegmentAvailabilityStart()).toBe(39);
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setElapsed(70);
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expect(timeline.getSegmentAvailabilityStart()).toBe(40);
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setElapsed(71);
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expect(timeline.getSegmentAvailabilityStart()).toBe(41);
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});
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it('returns the correct time for live with duration', function() {
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setElapsed(0);
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var timeline = new shaka.media.PresentationTimeline(
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60, Date.now() / 1000.0, 20, 10, 0);
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expect(timeline.getSegmentAvailabilityStart()).toBe(0);
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setElapsed(29);
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expect(timeline.getSegmentAvailabilityStart()).toBe(0);
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setElapsed(30);
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expect(timeline.getSegmentAvailabilityStart()).toBe(0);
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setElapsed(31);
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expect(timeline.getSegmentAvailabilityStart()).toBe(1);
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setElapsed(69);
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expect(timeline.getSegmentAvailabilityStart()).toBe(39);
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setElapsed(70);
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expect(timeline.getSegmentAvailabilityStart()).toBe(40);
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setElapsed(71);
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expect(timeline.getSegmentAvailabilityStart()).toBe(40);
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});
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it('returns the correct time for live with inf. availability', function() {
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setElapsed(0);
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var timeline = new shaka.media.PresentationTimeline(
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60, Date.now() / 1000.0, Number.POSITIVE_INFINITY, 10, 0);
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expect(timeline.getSegmentAvailabilityStart()).toBe(0);
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setElapsed(59);
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expect(timeline.getSegmentAvailabilityStart()).toBe(0);
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setElapsed(60);
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expect(timeline.getSegmentAvailabilityStart()).toBe(0);
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setElapsed(61);
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expect(timeline.getSegmentAvailabilityStart()).toBe(0);
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});
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});
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describe('getSegmentAvailabilityEnd', function() {
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it('returns duration for VOD', function() {
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setElapsed(0);
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var timeline1 = new shaka.media.PresentationTimeline(
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60, null, null, 10, 0);
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expect(timeline1.getSegmentAvailabilityEnd()).toBe(60);
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setElapsed(0);
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var timeline2 = new shaka.media.PresentationTimeline(
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Number.POSITIVE_INFINITY, null, null, 10, 0);
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expect(timeline2.getSegmentAvailabilityEnd()).toBe(
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Number.POSITIVE_INFINITY);
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});
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it('returns the correct time for live without duration', function() {
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setElapsed(0);
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var timeline = new shaka.media.PresentationTimeline(
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Number.POSITIVE_INFINITY, Date.now() / 1000.0, 20, 10, 0);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(0);
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setElapsed(0);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(0);
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setElapsed(10);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(0);
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setElapsed(11);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(1);
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setElapsed(69);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(59);
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setElapsed(70);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(60);
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setElapsed(71);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(61);
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});
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it('returns the correct time for live with duration', function() {
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setElapsed(0);
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var timeline = new shaka.media.PresentationTimeline(
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60, Date.now() / 1000.0, 20, 10, 0);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(0);
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setElapsed(0);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(0);
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setElapsed(11);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(1);
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setElapsed(69);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(59);
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setElapsed(70);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(60);
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// The seek window should stop.
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// TODO: Check if real encoders serve the end of a live stream
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// indefinitely or close the availability window entirely.
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setElapsed(71);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(60);
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});
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});
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describe('getDuration', function() {
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it('returns the correct value for VOD', function() {
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setElapsed(0);
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var timeline = new shaka.media.PresentationTimeline(
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60, null, null, 10, 0);
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expect(timeline.getDuration()).toBe(60);
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timeline = new shaka.media.PresentationTimeline(
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Number.POSITIVE_INFINITY, null, null, 10, 0);
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expect(timeline.getDuration()).toBe(Number.POSITIVE_INFINITY);
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});
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it('returns the correct value for live', function() {
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setElapsed(0);
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var timeline = new shaka.media.PresentationTimeline(
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60, Date.now() / 1000.0, 20, 10, 0);
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expect(timeline.getDuration()).toBe(60);
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timeline = new shaka.media.PresentationTimeline(
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Number.POSITIVE_INFINITY, Date.now() / 1000.0, 20, 10, 0);
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expect(timeline.getDuration()).toBe(Number.POSITIVE_INFINITY);
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});
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});
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describe('setDuration', function() {
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it('affects VOD', function() {
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setElapsed(0);
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var timeline = new shaka.media.PresentationTimeline(
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60, null, null, 10, 0);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(60);
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timeline.setDuration(90);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(90);
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});
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it('affects live', function() {
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setElapsed(0);
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var timeline = new shaka.media.PresentationTimeline(
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Number.POSITIVE_INFINITY, Date.now() / 1000.0, 20, 10, 0);
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setElapsed(40);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(30);
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setElapsed(100);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(90);
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timeline.setDuration(60);
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expect(timeline.getSegmentAvailabilityEnd()).toBe(60);
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});
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});
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it('getSegmentAvailabilityDuration', function() {
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setElapsed(0);
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var timeline = new shaka.media.PresentationTimeline(60, null, null, 10, 0);
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expect(timeline.getSegmentAvailabilityDuration()).toBeNull();
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timeline = new shaka.media.PresentationTimeline(
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Number.POSITIVE_INFINITY, Date.now() / 1000.0, 20, 10, 0);
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expect(timeline.getSegmentAvailabilityDuration()).toBe(20);
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timeline = new shaka.media.PresentationTimeline(
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Number.POSITIVE_INFINITY,
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Date.now() / 1000.0,
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Number.POSITIVE_INFINITY,
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10,
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0);
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expect(timeline.getSegmentAvailabilityDuration()).toBe(
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Number.POSITIVE_INFINITY);
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});
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it('clockOffset', function() {
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// setElapsed sets the local clock. The server is 10 seconds ahead so it
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// should return 10.
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setElapsed(0);
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var timeline = new shaka.media.PresentationTimeline(
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Number.POSITIVE_INFINITY, Date.now() / 1000.0, 10, 5, 10000);
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expect(timeline.getSegmentAvailabilityEnd()).toBeCloseTo(5);
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});
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});
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