mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-24 17:35:10 +03:00
michellezhuo
9d66e3bb09
For VOD, the first segment of every Media Playlist in every Variant Stream must start at the same media timestamp. Thus, we can get the start time once and store the value, and all the streams can use the value directly. For live, we assume for the same. This change reduces calling getStartTime_() from 15 times to once for Angel One, and also fixes the text segment timestamp issue. Also removed associated methods that no longer needed. Closes #1558 Closes #1563 Change-Id: I0e95ab93ea2b13758128f11019b262bc53dbcd38
96 lines
2.6 KiB
JavaScript
96 lines
2.6 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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goog.provide('shaka.text.Mp4TtmlParser');
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goog.require('shaka.text.TextEngine');
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goog.require('shaka.text.TtmlTextParser');
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goog.require('shaka.util.Error');
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goog.require('shaka.util.Mp4Parser');
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/**
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* @implements {shaka.extern.TextParser}
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*/
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shaka.text.Mp4TtmlParser = class {
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constructor() {
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/**
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* @type {!shaka.extern.TextParser}
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* @private
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*/
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this.parser_ = new shaka.text.TtmlTextParser();
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}
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/** @override **/
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parseInit(data) {
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const Mp4Parser = shaka.util.Mp4Parser;
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let sawSTPP = false;
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new Mp4Parser()
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.box('moov', Mp4Parser.children)
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.box('trak', Mp4Parser.children)
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.box('mdia', Mp4Parser.children)
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.box('minf', Mp4Parser.children)
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.box('stbl', Mp4Parser.children)
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.fullBox('stsd', Mp4Parser.sampleDescription)
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.box('stpp', (box) => {
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sawSTPP = true;
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box.parser.stop();
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}).parse(data);
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if (!sawSTPP) {
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throw new shaka.util.Error(
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shaka.util.Error.Severity.CRITICAL,
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shaka.util.Error.Category.TEXT,
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shaka.util.Error.Code.INVALID_MP4_TTML);
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}
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}
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/** @override **/
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parseMedia(data, time) {
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const Mp4Parser = shaka.util.Mp4Parser;
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let sawMDAT = false;
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let payload = [];
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const parser = new Mp4Parser()
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.box('mdat', Mp4Parser.allData((data) => {
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sawMDAT = true;
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// Join this to any previous payload, in case the mp4 has multiple
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// mdats.
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payload = payload.concat(this.parser_.parseMedia(data, time));
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}));
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parser.parse(data, /* partialOkay */ false);
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if (!sawMDAT) {
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throw new shaka.util.Error(
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shaka.util.Error.Severity.CRITICAL,
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shaka.util.Error.Category.TEXT,
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shaka.util.Error.Code.INVALID_MP4_TTML);
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}
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return payload;
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}
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};
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shaka.text.TextEngine.registerParser(
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'application/mp4; codecs="stpp"', shaka.text.Mp4TtmlParser);
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shaka.text.TextEngine.registerParser(
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'application/mp4; codecs="stpp.TTML.im1t"', shaka.text.Mp4TtmlParser);
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