mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-15 16:06:41 +03:00
David HM Morgan
601098bad1
> Quote from specs: > Valid examples include: > • "stpp.ttml.etd1" - TTML content suitable for presentation by an EBU-TT-D renderer > • "stpp.ttml.etd1|im1t" or "stpp.ttml.im1t|etd1" - TTML content suitable for presentation by an EBU-TT-D or IMSC1 renderer Fixes #6831
134 lines
3.5 KiB
JavaScript
134 lines
3.5 KiB
JavaScript
/*! @license
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* Shaka Player
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* Copyright 2016 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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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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* @export
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*/
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shaka.text.Mp4TtmlParser = class {
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/** */
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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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/**
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* @override
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* @export
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*/
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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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/**
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* @override
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* @export
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*/
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setSequenceMode(sequenceMode) {
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// Unused.
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}
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/**
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* @override
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* @export
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*/
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setManifestType(manifestType) {
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// Unused.
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}
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/**
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* @override
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* @export
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*/
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parseMedia(data, time, uri) {
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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, uri));
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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"', () => new shaka.text.Mp4TtmlParser());
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shaka.text.TextEngine.registerParser(
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'application/mp4; codecs="stpp.ttml"',
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() => new shaka.text.Mp4TtmlParser());
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shaka.text.TextEngine.registerParser(
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'application/mp4; codecs="stpp.ttml.im1t"',
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() => new shaka.text.Mp4TtmlParser());
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shaka.text.TextEngine.registerParser(
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'application/mp4; codecs="stpp.ttml.im2t"',
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() => new shaka.text.Mp4TtmlParser());
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shaka.text.TextEngine.registerParser(
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'application/mp4; codecs="stpp.ttml.etd1"',
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() => new shaka.text.Mp4TtmlParser());
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shaka.text.TextEngine.registerParser(
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'application/mp4; codecs="stpp.ttml.etd1|im1t"',
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() => new shaka.text.Mp4TtmlParser());
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shaka.text.TextEngine.registerParser(
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'application/mp4; codecs="stpp.ttml.im1t|etd1"',
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() => new shaka.text.Mp4TtmlParser());
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// Legacy codec string uses capital "TTML", i.e.: prior to HLS rfc8216bis:
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// Note that if a Variant Stream specifies one or more Renditions that
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// include IMSC subtitles, the CODECS attribute MUST indicate this with a
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// format identifier such as "stpp.ttml.im1t".
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// (https://tools.ietf.org/html/draft-pantos-hls-rfc8216bis-05#section-4.4.5.2)
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shaka.text.TextEngine.registerParser(
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'application/mp4; codecs="stpp.TTML.im1t"',
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() => new shaka.text.Mp4TtmlParser());
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