mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-16 16:16:40 +03:00
Joey Parrish
08cec995c9
This replaces find/get callbacks in Stream with a SegmentIndex. With the exception of DASH's SegmentTemplate+duration, all manifests were already backed by SegmentIndex. Now, all manifests are backed by SegmentIndex. This will simplify Period-flattening, in which all tracks will be represented by a list of segments, some of which come from different Periods. The SegmentIndex in Stream will not be created until createSegmentIndex is called. Prior to this change, the find/get callbacks could be invoked without createSegmentIndex() in some cases (excluding DASH's SegmentBase), which some lazy tests took advantage of. Now that find/get are methods on SegmentIndex, createSegmentIndex must be called in all cases. The tests have been updated accordingly. Making SegmentIndex generation async in all cases exposed some issues with the parser context being modified in-place between one Representation and the next. So the parser now makes a shallow copy of the context before it is bound into an async callback. To facilitate updating the SegmentIndex for SegmentTemplate+duration content, SegmentIndex now has a method to update its list on a timer. Once per segment duration, the index will be updated to add and remove SegmentReferences. The initial expansion of SegmentTemplate+duration will be limited to a relatively small number of segments, to avoid excessive CPU or memory consumption. This defaults to 1000 segments, but is configurable. Issue #1339 Change-Id: I99c007b1096c3b396d04a729750cd7b743cb899d
324 lines
12 KiB
JavaScript
324 lines
12 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('DashParser SegmentBase', () => {
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const Dash = shaka.test.Dash;
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const indexSegmentUri = '/base/test/test/assets/index-segment.mp4';
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/** @type {!shaka.test.FakeNetworkingEngine} */
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let fakeNetEngine;
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/** @type {!shaka.dash.DashParser} */
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let parser;
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/** @type {shaka.extern.ManifestParser.PlayerInterface} */
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let playerInterface;
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/** @type {!ArrayBuffer} */
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let indexSegment;
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beforeAll(async () => {
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indexSegment = await shaka.test.Util.fetch(indexSegmentUri);
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});
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beforeEach(() => {
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fakeNetEngine = new shaka.test.FakeNetworkingEngine();
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parser = shaka.test.Dash.makeDashParser();
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playerInterface = {
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networkingEngine: fakeNetEngine,
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filterNewPeriod: () => {},
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filterAllPeriods: () => {},
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onTimelineRegionAdded: fail, // Should not have any EventStream elements.
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onEvent: fail,
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onError: fail,
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};
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});
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it('requests init data for WebM', async () => {
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const source = [
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'<MPD mediaPresentationDuration="PT75S">',
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' <Period>',
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' <AdaptationSet mimeType="video/webm">',
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' <Representation bandwidth="1">',
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' <BaseURL>http://example.com</BaseURL>',
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' <SegmentBase indexRange="100-200" timescale="9000">',
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' <Initialization sourceURL="init.webm" range="201-300" />',
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' </SegmentBase>',
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' </Representation>',
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' </AdaptationSet>',
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' </Period>',
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'</MPD>',
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].join('\n');
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fakeNetEngine
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.setResponseText('dummy://foo', source)
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.setResponseText('http://example.com', '')
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.setResponseText('http://example.com/init.webm', '');
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const manifest = await parser.start('dummy://foo', playerInterface);
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expect(manifest).toEqual(Dash.makeManifestFromInit('init.webm', 201, 300));
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await Dash.callCreateSegmentIndex(manifest);
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expect(fakeNetEngine.request).toHaveBeenCalledTimes(3);
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fakeNetEngine.expectRangeRequest('http://example.com', 100, 200);
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fakeNetEngine.expectRangeRequest('http://example.com/init.webm', 201, 300);
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});
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it('inherits from Period', async () => {
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const source = [
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'<MPD mediaPresentationDuration="PT75S">',
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' <Period>',
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' <BaseURL>http://example.com</BaseURL>',
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' <SegmentBase indexRange="100-200" timescale="9000">',
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' <Initialization sourceURL="init.mp4" range="201-300" />',
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' </SegmentBase>',
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' <AdaptationSet mimeType="video/mp4">',
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' <Representation bandwidth="1" />',
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' </AdaptationSet>',
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' </Period>',
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'</MPD>',
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].join('\n');
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fakeNetEngine
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.setResponseText('dummy://foo', source)
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.setResponseText('http://example.com', '');
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const manifest = await parser.start('dummy://foo', playerInterface);
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expect(manifest).toEqual(Dash.makeManifestFromInit('init.mp4', 201, 300));
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await Dash.callCreateSegmentIndex(manifest);
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expect(fakeNetEngine.request).toHaveBeenCalledTimes(2);
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fakeNetEngine.expectRangeRequest('http://example.com', 100, 200);
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});
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it('inherits from AdaptationSet', async () => {
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const source = [
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'<MPD mediaPresentationDuration="PT75S">',
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' <Period>',
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' <AdaptationSet mimeType="video/mp4">',
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' <BaseURL>http://example.com</BaseURL>',
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' <SegmentBase indexRange="100-200" timescale="9000">',
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' <Initialization sourceURL="init.mp4" range="201-300" />',
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' </SegmentBase>',
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' <Representation bandwidth="1" />',
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' </AdaptationSet>',
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' </Period>',
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'</MPD>',
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].join('\n');
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fakeNetEngine
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.setResponseText('dummy://foo', source)
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.setResponseText('http://example.com', '');
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const manifest = await parser.start('dummy://foo', playerInterface);
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expect(manifest).toEqual(Dash.makeManifestFromInit('init.mp4', 201, 300));
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await Dash.callCreateSegmentIndex(manifest);
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expect(fakeNetEngine.request).toHaveBeenCalledTimes(2);
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fakeNetEngine.expectRangeRequest('http://example.com', 100, 200);
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});
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it('does not require sourceURL in Initialization', async () => {
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const source = [
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'<MPD mediaPresentationDuration="PT75S">',
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' <Period>',
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' <AdaptationSet mimeType="video/mp4">',
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' <Representation bandwidth="1">',
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' <BaseURL>http://example.com/stream.mp4</BaseURL>',
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' <SegmentBase indexRange="100-200" timescale="9000">',
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' <Initialization range="201-300" />',
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' </SegmentBase>',
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' </Representation>',
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' </AdaptationSet>',
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' </Period>',
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'</MPD>',
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].join('\n');
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fakeNetEngine
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.setResponseText('dummy://foo', source)
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.setResponseText('http://example.com/stream.mp4', '');
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const manifest = await parser.start('dummy://foo', playerInterface);
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expect(manifest).toEqual(Dash.makeManifestFromInit('stream.mp4', 201, 300));
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await Dash.callCreateSegmentIndex(manifest);
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expect(fakeNetEngine.request).toHaveBeenCalledTimes(2);
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fakeNetEngine.expectRangeRequest('http://example.com/stream.mp4', 100, 200);
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});
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it('merges across levels', async () => {
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const source = [
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'<MPD mediaPresentationDuration="PT75S">',
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' <Period>',
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' <BaseURL>http://example.com</BaseURL>',
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' <SegmentBase timescale="9000">',
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' <Initialization sourceURL="init.mp4" range="201-300" />',
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' </SegmentBase>',
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' <AdaptationSet mimeType="video/mp4">',
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' <SegmentBase presentationTimeOffset="90000">',
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' <Initialization sourceURL="init.mp4" range="201-300" />',
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' </SegmentBase>',
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' <Representation bandwidth="1">',
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' <SegmentBase>',
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' <RepresentationIndex sourceURL="index.mp4" range="5-2000" />',
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' </SegmentBase>',
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' </Representation>',
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' </AdaptationSet>',
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' </Period>',
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'</MPD>',
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].join('\n');
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fakeNetEngine
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.setResponseText('dummy://foo', source)
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.setResponseText('http://example.com/index.mp4', '');
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const manifest = await parser.start('dummy://foo', playerInterface);
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expect(manifest).toEqual(
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Dash.makeManifestFromInit('init.mp4', 201, 300, 10));
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await Dash.callCreateSegmentIndex(manifest);
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expect(fakeNetEngine.request).toHaveBeenCalledTimes(2);
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fakeNetEngine.expectRangeRequest('http://example.com/index.mp4', 5, 2000);
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});
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it('merges and overrides across levels', async () => {
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const source = [
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'<MPD mediaPresentationDuration="PT75S">',
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' <Period>',
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' <BaseURL>http://example.com</BaseURL>',
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' <SegmentBase indexRange="0-10" timescale="9000">',
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' <Initialization sourceURL="init.mp4" range="201-300" />',
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' </SegmentBase>',
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' <AdaptationSet mimeType="video/mp4">',
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' <SegmentBase timescale="10" presentationTimeOffset="10">',
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' <Initialization sourceURL="special.mp4" />',
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' </SegmentBase>',
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' <Representation bandwidth="1">',
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' <SegmentBase indexRange="30-900" ',
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' presentationTimeOffset="200" />',
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' </Representation>',
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' </AdaptationSet>',
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' </Period>',
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'</MPD>',
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].join('\n');
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fakeNetEngine
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.setResponseText('dummy://foo', source)
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.setResponseText('http://example.com', '');
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const manifest = await parser.start('dummy://foo', playerInterface);
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expect(manifest).toEqual(
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Dash.makeManifestFromInit('special.mp4', 0, null, 20));
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await Dash.callCreateSegmentIndex(manifest);
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expect(fakeNetEngine.request).toHaveBeenCalledTimes(2);
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fakeNetEngine.expectRangeRequest('http://example.com', 30, 900);
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});
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it('does not assume the same timescale as media', async () => {
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const source = [
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'<MPD mediaPresentationDuration="PT75S">',
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' <Period>',
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' <AdaptationSet mimeType="video/mp4">',
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' <Representation bandwidth="1">',
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' <BaseURL>http://example.com/index.mp4</BaseURL>',
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' <SegmentBase indexRange="30-900" ',
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' timescale="1000"',
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' presentationTimeOffset="2000" />',
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' </Representation>',
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' </AdaptationSet>',
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' </Period>',
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'</MPD>',
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].join('\n');
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fakeNetEngine
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.setResponseText('dummy://foo', source)
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.setResponseValue('http://example.com/index.mp4', indexSegment);
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const manifest = await parser.start('dummy://foo', playerInterface);
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const video = manifest.periods[0].variants[0].video;
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await video.createSegmentIndex(); // real data, should succeed
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const reference = video.segmentIndex.get(0);
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expect(reference.startTime).toBe(-2);
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expect(reference.endTime).toBe(10); // would be 12 without PTO
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});
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describe('fails for', () => {
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it('unsupported container', async () => {
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const source = [
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'<MPD mediaPresentationDuration="PT75S">',
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' <Period>',
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' <BaseURL>http://example.com</BaseURL>',
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' <AdaptationSet mimeType="video/cat">',
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' <Representation bandwidth="1">',
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' <SegmentBase indexRange="30-900" />',
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' </Representation>',
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' </AdaptationSet>',
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' </Period>',
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'</MPD>',
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].join('\n');
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const error = new shaka.util.Error(
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shaka.util.Error.Severity.CRITICAL,
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shaka.util.Error.Category.MANIFEST,
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shaka.util.Error.Code.DASH_UNSUPPORTED_CONTAINER);
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await Dash.testFails(source, error);
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});
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it('missing init segment for WebM', async () => {
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const source = [
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'<MPD mediaPresentationDuration="PT75S">',
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' <Period>',
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' <BaseURL>http://example.com</BaseURL>',
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' <AdaptationSet mimeType="video/webm">',
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' <Representation bandwidth="1">',
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' <SegmentBase indexRange="30-900" />',
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' </Representation>',
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' </AdaptationSet>',
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' </Period>',
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'</MPD>',
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].join('\n');
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const error = new shaka.util.Error(
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shaka.util.Error.Severity.CRITICAL,
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shaka.util.Error.Category.MANIFEST,
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shaka.util.Error.Code.DASH_WEBM_MISSING_INIT);
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await Dash.testFails(source, error);
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});
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it('no @indexRange nor RepresentationIndex', async () => {
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const source = [
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'<MPD mediaPresentationDuration="PT75S">',
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' <Period>',
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' <BaseURL>http://example.com</BaseURL>',
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' <AdaptationSet mimeType="video/webm">',
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' <Representation bandwidth="1">',
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' <SegmentBase>',
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' <Initialization sourceURL="test.webm" />',
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' </SegmentBase>',
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' </Representation>',
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' </AdaptationSet>',
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' </Period>',
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'</MPD>',
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].join('\n');
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const error = new shaka.util.Error(
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shaka.util.Error.Severity.CRITICAL,
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shaka.util.Error.Category.MANIFEST,
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shaka.util.Error.Code.DASH_NO_SEGMENT_INFO);
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await Dash.testFails(source, error);
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});
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});
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});
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