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1177 lines
33 KiB
1177 lines
33 KiB
/*! @name m3u8-parser @version 4.5.2 @license Apache-2.0 */
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import _inheritsLoose from '@babel/runtime/helpers/inheritsLoose';
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import Stream from '@videojs/vhs-utils/es/stream.js';
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import _extends from '@babel/runtime/helpers/extends';
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import _assertThisInitialized from '@babel/runtime/helpers/assertThisInitialized';
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import decodeB64ToUint8Array from '@videojs/vhs-utils/es/decode-b64-to-uint8-array.js';
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/**
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* A stream that buffers string input and generates a `data` event for each
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* line.
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*
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* @class LineStream
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* @extends Stream
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*/
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var LineStream = /*#__PURE__*/function (_Stream) {
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_inheritsLoose(LineStream, _Stream);
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function LineStream() {
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var _this;
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_this = _Stream.call(this) || this;
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_this.buffer = '';
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return _this;
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}
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/**
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* Add new data to be parsed.
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*
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* @param {string} data the text to process
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*/
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var _proto = LineStream.prototype;
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_proto.push = function push(data) {
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var nextNewline;
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this.buffer += data;
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nextNewline = this.buffer.indexOf('\n');
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for (; nextNewline > -1; nextNewline = this.buffer.indexOf('\n')) {
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this.trigger('data', this.buffer.substring(0, nextNewline));
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this.buffer = this.buffer.substring(nextNewline + 1);
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}
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};
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return LineStream;
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}(Stream);
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/**
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* "forgiving" attribute list psuedo-grammar:
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* attributes -> keyvalue (',' keyvalue)*
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* keyvalue -> key '=' value
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* key -> [^=]*
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* value -> '"' [^"]* '"' | [^,]*
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*/
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var attributeSeparator = function attributeSeparator() {
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var key = '[^=]*';
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var value = '"[^"]*"|[^,]*';
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var keyvalue = '(?:' + key + ')=(?:' + value + ')';
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return new RegExp('(?:^|,)(' + keyvalue + ')');
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};
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/**
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* Parse attributes from a line given the separator
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*
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* @param {string} attributes the attribute line to parse
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*/
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var parseAttributes = function parseAttributes(attributes) {
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// split the string using attributes as the separator
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var attrs = attributes.split(attributeSeparator());
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var result = {};
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var i = attrs.length;
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var attr;
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while (i--) {
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// filter out unmatched portions of the string
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if (attrs[i] === '') {
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continue;
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} // split the key and value
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attr = /([^=]*)=(.*)/.exec(attrs[i]).slice(1); // trim whitespace and remove optional quotes around the value
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attr[0] = attr[0].replace(/^\s+|\s+$/g, '');
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attr[1] = attr[1].replace(/^\s+|\s+$/g, '');
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attr[1] = attr[1].replace(/^['"](.*)['"]$/g, '$1');
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result[attr[0]] = attr[1];
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}
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return result;
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};
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/**
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* A line-level M3U8 parser event stream. It expects to receive input one
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* line at a time and performs a context-free parse of its contents. A stream
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* interpretation of a manifest can be useful if the manifest is expected to
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* be too large to fit comfortably into memory or the entirety of the input
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* is not immediately available. Otherwise, it's probably much easier to work
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* with a regular `Parser` object.
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*
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* Produces `data` events with an object that captures the parser's
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* interpretation of the input. That object has a property `tag` that is one
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* of `uri`, `comment`, or `tag`. URIs only have a single additional
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* property, `line`, which captures the entirety of the input without
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* interpretation. Comments similarly have a single additional property
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* `text` which is the input without the leading `#`.
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*
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* Tags always have a property `tagType` which is the lower-cased version of
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* the M3U8 directive without the `#EXT` or `#EXT-X-` prefix. For instance,
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* `#EXT-X-MEDIA-SEQUENCE` becomes `media-sequence` when parsed. Unrecognized
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* tags are given the tag type `unknown` and a single additional property
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* `data` with the remainder of the input.
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*
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* @class ParseStream
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* @extends Stream
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*/
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var ParseStream = /*#__PURE__*/function (_Stream) {
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_inheritsLoose(ParseStream, _Stream);
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function ParseStream() {
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var _this;
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_this = _Stream.call(this) || this;
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_this.customParsers = [];
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_this.tagMappers = [];
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return _this;
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}
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/**
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* Parses an additional line of input.
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*
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* @param {string} line a single line of an M3U8 file to parse
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*/
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var _proto = ParseStream.prototype;
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_proto.push = function push(line) {
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var _this2 = this;
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var match;
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var event; // strip whitespace
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line = line.trim();
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if (line.length === 0) {
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// ignore empty lines
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return;
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} // URIs
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if (line[0] !== '#') {
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this.trigger('data', {
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type: 'uri',
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uri: line
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});
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return;
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} // map tags
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var newLines = this.tagMappers.reduce(function (acc, mapper) {
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var mappedLine = mapper(line); // skip if unchanged
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if (mappedLine === line) {
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return acc;
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}
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return acc.concat([mappedLine]);
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}, [line]);
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newLines.forEach(function (newLine) {
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for (var i = 0; i < _this2.customParsers.length; i++) {
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if (_this2.customParsers[i].call(_this2, newLine)) {
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return;
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}
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} // Comments
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if (newLine.indexOf('#EXT') !== 0) {
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_this2.trigger('data', {
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type: 'comment',
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text: newLine.slice(1)
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});
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return;
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} // strip off any carriage returns here so the regex matching
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// doesn't have to account for them.
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newLine = newLine.replace('\r', ''); // Tags
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match = /^#EXTM3U/.exec(newLine);
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if (match) {
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_this2.trigger('data', {
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type: 'tag',
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tagType: 'm3u'
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});
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return;
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}
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match = /^#EXTINF:?([0-9\.]*)?,?(.*)?$/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'inf'
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};
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if (match[1]) {
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event.duration = parseFloat(match[1]);
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}
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if (match[2]) {
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event.title = match[2];
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-TARGETDURATION:?([0-9.]*)?/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'targetduration'
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};
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if (match[1]) {
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event.duration = parseInt(match[1], 10);
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#ZEN-TOTAL-DURATION:?([0-9.]*)?/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'totalduration'
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};
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if (match[1]) {
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event.duration = parseInt(match[1], 10);
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-VERSION:?([0-9.]*)?/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'version'
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};
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if (match[1]) {
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event.version = parseInt(match[1], 10);
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-MEDIA-SEQUENCE:?(\-?[0-9.]*)?/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'media-sequence'
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};
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if (match[1]) {
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event.number = parseInt(match[1], 10);
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-DISCONTINUITY-SEQUENCE:?(\-?[0-9.]*)?/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'discontinuity-sequence'
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};
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if (match[1]) {
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event.number = parseInt(match[1], 10);
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-PLAYLIST-TYPE:?(.*)?$/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'playlist-type'
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};
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if (match[1]) {
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event.playlistType = match[1];
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-BYTERANGE:?([0-9.]*)?@?([0-9.]*)?/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'byterange'
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};
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if (match[1]) {
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event.length = parseInt(match[1], 10);
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}
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if (match[2]) {
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event.offset = parseInt(match[2], 10);
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-ALLOW-CACHE:?(YES|NO)?/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'allow-cache'
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};
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if (match[1]) {
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event.allowed = !/NO/.test(match[1]);
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-MAP:?(.*)$/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'map'
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};
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if (match[1]) {
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var attributes = parseAttributes(match[1]);
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if (attributes.URI) {
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event.uri = attributes.URI;
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}
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if (attributes.BYTERANGE) {
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var _attributes$BYTERANGE = attributes.BYTERANGE.split('@'),
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length = _attributes$BYTERANGE[0],
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offset = _attributes$BYTERANGE[1];
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event.byterange = {};
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if (length) {
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event.byterange.length = parseInt(length, 10);
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}
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if (offset) {
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event.byterange.offset = parseInt(offset, 10);
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}
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}
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-STREAM-INF:?(.*)$/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'stream-inf'
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};
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if (match[1]) {
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event.attributes = parseAttributes(match[1]);
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if (event.attributes.RESOLUTION) {
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var split = event.attributes.RESOLUTION.split('x');
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var resolution = {};
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if (split[0]) {
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resolution.width = parseInt(split[0], 10);
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}
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if (split[1]) {
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resolution.height = parseInt(split[1], 10);
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}
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event.attributes.RESOLUTION = resolution;
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}
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if (event.attributes.BANDWIDTH) {
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event.attributes.BANDWIDTH = parseInt(event.attributes.BANDWIDTH, 10);
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}
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if (event.attributes['PROGRAM-ID']) {
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event.attributes['PROGRAM-ID'] = parseInt(event.attributes['PROGRAM-ID'], 10);
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}
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-MEDIA:?(.*)$/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'media'
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};
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if (match[1]) {
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event.attributes = parseAttributes(match[1]);
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-ENDLIST/.exec(newLine);
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if (match) {
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_this2.trigger('data', {
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type: 'tag',
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tagType: 'endlist'
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});
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return;
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}
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match = /^#EXT-X-DISCONTINUITY/.exec(newLine);
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if (match) {
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_this2.trigger('data', {
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type: 'tag',
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tagType: 'discontinuity'
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});
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return;
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}
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match = /^#EXT-X-PROGRAM-DATE-TIME:?(.*)$/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'program-date-time'
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};
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if (match[1]) {
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event.dateTimeString = match[1];
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event.dateTimeObject = new Date(match[1]);
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-KEY:?(.*)$/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'key'
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};
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if (match[1]) {
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event.attributes = parseAttributes(match[1]); // parse the IV string into a Uint32Array
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if (event.attributes.IV) {
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if (event.attributes.IV.substring(0, 2).toLowerCase() === '0x') {
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event.attributes.IV = event.attributes.IV.substring(2);
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}
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event.attributes.IV = event.attributes.IV.match(/.{8}/g);
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event.attributes.IV[0] = parseInt(event.attributes.IV[0], 16);
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event.attributes.IV[1] = parseInt(event.attributes.IV[1], 16);
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event.attributes.IV[2] = parseInt(event.attributes.IV[2], 16);
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event.attributes.IV[3] = parseInt(event.attributes.IV[3], 16);
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event.attributes.IV = new Uint32Array(event.attributes.IV);
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}
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-START:?(.*)$/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'start'
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};
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if (match[1]) {
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event.attributes = parseAttributes(match[1]);
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event.attributes['TIME-OFFSET'] = parseFloat(event.attributes['TIME-OFFSET']);
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event.attributes.PRECISE = /YES/.test(event.attributes.PRECISE);
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-CUE-OUT-CONT:?(.*)?$/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'cue-out-cont'
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};
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if (match[1]) {
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event.data = match[1];
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} else {
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event.data = '';
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-CUE-OUT:?(.*)?$/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'cue-out'
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};
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if (match[1]) {
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event.data = match[1];
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} else {
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event.data = '';
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}
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_this2.trigger('data', event);
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return;
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}
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match = /^#EXT-X-CUE-IN:?(.*)?$/.exec(newLine);
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if (match) {
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event = {
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type: 'tag',
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tagType: 'cue-in'
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};
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if (match[1]) {
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event.data = match[1];
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} else {
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event.data = '';
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}
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_this2.trigger('data', event);
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return;
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} // unknown tag type
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_this2.trigger('data', {
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type: 'tag',
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data: newLine.slice(4)
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});
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});
|
|
}
|
|
/**
|
|
* Add a parser for custom headers
|
|
*
|
|
* @param {Object} options a map of options for the added parser
|
|
* @param {RegExp} options.expression a regular expression to match the custom header
|
|
* @param {string} options.customType the custom type to register to the output
|
|
* @param {Function} [options.dataParser] function to parse the line into an object
|
|
* @param {boolean} [options.segment] should tag data be attached to the segment object
|
|
*/
|
|
;
|
|
|
|
_proto.addParser = function addParser(_ref) {
|
|
var _this3 = this;
|
|
|
|
var expression = _ref.expression,
|
|
customType = _ref.customType,
|
|
dataParser = _ref.dataParser,
|
|
segment = _ref.segment;
|
|
|
|
if (typeof dataParser !== 'function') {
|
|
dataParser = function dataParser(line) {
|
|
return line;
|
|
};
|
|
}
|
|
|
|
this.customParsers.push(function (line) {
|
|
var match = expression.exec(line);
|
|
|
|
if (match) {
|
|
_this3.trigger('data', {
|
|
type: 'custom',
|
|
data: dataParser(line),
|
|
customType: customType,
|
|
segment: segment
|
|
});
|
|
|
|
return true;
|
|
}
|
|
});
|
|
}
|
|
/**
|
|
* Add a custom header mapper
|
|
*
|
|
* @param {Object} options
|
|
* @param {RegExp} options.expression a regular expression to match the custom header
|
|
* @param {Function} options.map function to translate tag into a different tag
|
|
*/
|
|
;
|
|
|
|
_proto.addTagMapper = function addTagMapper(_ref2) {
|
|
var expression = _ref2.expression,
|
|
map = _ref2.map;
|
|
|
|
var mapFn = function mapFn(line) {
|
|
if (expression.test(line)) {
|
|
return map(line);
|
|
}
|
|
|
|
return line;
|
|
};
|
|
|
|
this.tagMappers.push(mapFn);
|
|
};
|
|
|
|
return ParseStream;
|
|
}(Stream);
|
|
|
|
/**
|
|
* A parser for M3U8 files. The current interpretation of the input is
|
|
* exposed as a property `manifest` on parser objects. It's just two lines to
|
|
* create and parse a manifest once you have the contents available as a string:
|
|
*
|
|
* ```js
|
|
* var parser = new m3u8.Parser();
|
|
* parser.push(xhr.responseText);
|
|
* ```
|
|
*
|
|
* New input can later be applied to update the manifest object by calling
|
|
* `push` again.
|
|
*
|
|
* The parser attempts to create a usable manifest object even if the
|
|
* underlying input is somewhat nonsensical. It emits `info` and `warning`
|
|
* events during the parse if it encounters input that seems invalid or
|
|
* requires some property of the manifest object to be defaulted.
|
|
*
|
|
* @class Parser
|
|
* @extends Stream
|
|
*/
|
|
|
|
var Parser = /*#__PURE__*/function (_Stream) {
|
|
_inheritsLoose(Parser, _Stream);
|
|
|
|
function Parser() {
|
|
var _this;
|
|
|
|
_this = _Stream.call(this) || this;
|
|
_this.lineStream = new LineStream();
|
|
_this.parseStream = new ParseStream();
|
|
|
|
_this.lineStream.pipe(_this.parseStream);
|
|
/* eslint-disable consistent-this */
|
|
|
|
|
|
var self = _assertThisInitialized(_this);
|
|
/* eslint-enable consistent-this */
|
|
|
|
|
|
var uris = [];
|
|
var currentUri = {}; // if specified, the active EXT-X-MAP definition
|
|
|
|
var currentMap; // if specified, the active decryption key
|
|
|
|
var _key;
|
|
|
|
var noop = function noop() {};
|
|
|
|
var defaultMediaGroups = {
|
|
'AUDIO': {},
|
|
'VIDEO': {},
|
|
'CLOSED-CAPTIONS': {},
|
|
'SUBTITLES': {}
|
|
}; // This is the Widevine UUID from DASH IF IOP. The same exact string is
|
|
// used in MPDs with Widevine encrypted streams.
|
|
|
|
var widevineUuid = 'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed'; // group segments into numbered timelines delineated by discontinuities
|
|
|
|
var currentTimeline = 0; // the manifest is empty until the parse stream begins delivering data
|
|
|
|
_this.manifest = {
|
|
allowCache: true,
|
|
discontinuityStarts: [],
|
|
segments: []
|
|
}; // keep track of the last seen segment's byte range end, as segments are not required
|
|
// to provide the offset, in which case it defaults to the next byte after the
|
|
// previous segment
|
|
|
|
var lastByterangeEnd = 0; // update the manifest with the m3u8 entry from the parse stream
|
|
|
|
_this.parseStream.on('data', function (entry) {
|
|
var mediaGroup;
|
|
var rendition;
|
|
({
|
|
tag: function tag() {
|
|
// switch based on the tag type
|
|
(({
|
|
'allow-cache': function allowCache() {
|
|
this.manifest.allowCache = entry.allowed;
|
|
|
|
if (!('allowed' in entry)) {
|
|
this.trigger('info', {
|
|
message: 'defaulting allowCache to YES'
|
|
});
|
|
this.manifest.allowCache = true;
|
|
}
|
|
},
|
|
byterange: function byterange() {
|
|
var byterange = {};
|
|
|
|
if ('length' in entry) {
|
|
currentUri.byterange = byterange;
|
|
byterange.length = entry.length;
|
|
|
|
if (!('offset' in entry)) {
|
|
/*
|
|
* From the latest spec (as of this writing):
|
|
* https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.2.2
|
|
*
|
|
* Same text since EXT-X-BYTERANGE's introduction in draft 7:
|
|
* https://tools.ietf.org/html/draft-pantos-http-live-streaming-07#section-3.3.1)
|
|
*
|
|
* "If o [offset] is not present, the sub-range begins at the next byte
|
|
* following the sub-range of the previous media segment."
|
|
*/
|
|
entry.offset = lastByterangeEnd;
|
|
}
|
|
}
|
|
|
|
if ('offset' in entry) {
|
|
currentUri.byterange = byterange;
|
|
byterange.offset = entry.offset;
|
|
}
|
|
|
|
lastByterangeEnd = byterange.offset + byterange.length;
|
|
},
|
|
endlist: function endlist() {
|
|
this.manifest.endList = true;
|
|
},
|
|
inf: function inf() {
|
|
if (!('mediaSequence' in this.manifest)) {
|
|
this.manifest.mediaSequence = 0;
|
|
this.trigger('info', {
|
|
message: 'defaulting media sequence to zero'
|
|
});
|
|
}
|
|
|
|
if (!('discontinuitySequence' in this.manifest)) {
|
|
this.manifest.discontinuitySequence = 0;
|
|
this.trigger('info', {
|
|
message: 'defaulting discontinuity sequence to zero'
|
|
});
|
|
}
|
|
|
|
if (entry.duration > 0) {
|
|
currentUri.duration = entry.duration;
|
|
}
|
|
|
|
if (entry.duration === 0) {
|
|
currentUri.duration = 0.01;
|
|
this.trigger('info', {
|
|
message: 'updating zero segment duration to a small value'
|
|
});
|
|
}
|
|
|
|
this.manifest.segments = uris;
|
|
},
|
|
key: function key() {
|
|
if (!entry.attributes) {
|
|
this.trigger('warn', {
|
|
message: 'ignoring key declaration without attribute list'
|
|
});
|
|
return;
|
|
} // clear the active encryption key
|
|
|
|
|
|
if (entry.attributes.METHOD === 'NONE') {
|
|
_key = null;
|
|
return;
|
|
}
|
|
|
|
if (!entry.attributes.URI) {
|
|
this.trigger('warn', {
|
|
message: 'ignoring key declaration without URI'
|
|
});
|
|
return;
|
|
} // check if the content is encrypted for Widevine
|
|
// Widevine/HLS spec: https://storage.googleapis.com/wvdocs/Widevine_DRM_HLS.pdf
|
|
|
|
|
|
if (entry.attributes.KEYFORMAT === widevineUuid) {
|
|
var VALID_METHODS = ['SAMPLE-AES', 'SAMPLE-AES-CTR', 'SAMPLE-AES-CENC'];
|
|
|
|
if (VALID_METHODS.indexOf(entry.attributes.METHOD) === -1) {
|
|
this.trigger('warn', {
|
|
message: 'invalid key method provided for Widevine'
|
|
});
|
|
return;
|
|
}
|
|
|
|
if (entry.attributes.METHOD === 'SAMPLE-AES-CENC') {
|
|
this.trigger('warn', {
|
|
message: 'SAMPLE-AES-CENC is deprecated, please use SAMPLE-AES-CTR instead'
|
|
});
|
|
}
|
|
|
|
if (entry.attributes.URI.substring(0, 23) !== 'data:text/plain;base64,') {
|
|
this.trigger('warn', {
|
|
message: 'invalid key URI provided for Widevine'
|
|
});
|
|
return;
|
|
}
|
|
|
|
if (!(entry.attributes.KEYID && entry.attributes.KEYID.substring(0, 2) === '0x')) {
|
|
this.trigger('warn', {
|
|
message: 'invalid key ID provided for Widevine'
|
|
});
|
|
return;
|
|
} // if Widevine key attributes are valid, store them as `contentProtection`
|
|
// on the manifest to emulate Widevine tag structure in a DASH mpd
|
|
|
|
|
|
this.manifest.contentProtection = {
|
|
'com.widevine.alpha': {
|
|
attributes: {
|
|
schemeIdUri: entry.attributes.KEYFORMAT,
|
|
// remove '0x' from the key id string
|
|
keyId: entry.attributes.KEYID.substring(2)
|
|
},
|
|
// decode the base64-encoded PSSH box
|
|
pssh: decodeB64ToUint8Array(entry.attributes.URI.split(',')[1])
|
|
}
|
|
};
|
|
return;
|
|
}
|
|
|
|
if (!entry.attributes.METHOD) {
|
|
this.trigger('warn', {
|
|
message: 'defaulting key method to AES-128'
|
|
});
|
|
} // setup an encryption key for upcoming segments
|
|
|
|
|
|
_key = {
|
|
method: entry.attributes.METHOD || 'AES-128',
|
|
uri: entry.attributes.URI
|
|
};
|
|
|
|
if (typeof entry.attributes.IV !== 'undefined') {
|
|
_key.iv = entry.attributes.IV;
|
|
}
|
|
},
|
|
'media-sequence': function mediaSequence() {
|
|
if (!isFinite(entry.number)) {
|
|
this.trigger('warn', {
|
|
message: 'ignoring invalid media sequence: ' + entry.number
|
|
});
|
|
return;
|
|
}
|
|
|
|
this.manifest.mediaSequence = entry.number;
|
|
},
|
|
'discontinuity-sequence': function discontinuitySequence() {
|
|
if (!isFinite(entry.number)) {
|
|
this.trigger('warn', {
|
|
message: 'ignoring invalid discontinuity sequence: ' + entry.number
|
|
});
|
|
return;
|
|
}
|
|
|
|
this.manifest.discontinuitySequence = entry.number;
|
|
currentTimeline = entry.number;
|
|
},
|
|
'playlist-type': function playlistType() {
|
|
if (!/VOD|EVENT/.test(entry.playlistType)) {
|
|
this.trigger('warn', {
|
|
message: 'ignoring unknown playlist type: ' + entry.playlist
|
|
});
|
|
return;
|
|
}
|
|
|
|
this.manifest.playlistType = entry.playlistType;
|
|
},
|
|
map: function map() {
|
|
currentMap = {};
|
|
|
|
if (entry.uri) {
|
|
currentMap.uri = entry.uri;
|
|
}
|
|
|
|
if (entry.byterange) {
|
|
currentMap.byterange = entry.byterange;
|
|
}
|
|
},
|
|
'stream-inf': function streamInf() {
|
|
this.manifest.playlists = uris;
|
|
this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;
|
|
|
|
if (!entry.attributes) {
|
|
this.trigger('warn', {
|
|
message: 'ignoring empty stream-inf attributes'
|
|
});
|
|
return;
|
|
}
|
|
|
|
if (!currentUri.attributes) {
|
|
currentUri.attributes = {};
|
|
}
|
|
|
|
_extends(currentUri.attributes, entry.attributes);
|
|
},
|
|
media: function media() {
|
|
this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;
|
|
|
|
if (!(entry.attributes && entry.attributes.TYPE && entry.attributes['GROUP-ID'] && entry.attributes.NAME)) {
|
|
this.trigger('warn', {
|
|
message: 'ignoring incomplete or missing media group'
|
|
});
|
|
return;
|
|
} // find the media group, creating defaults as necessary
|
|
|
|
|
|
var mediaGroupType = this.manifest.mediaGroups[entry.attributes.TYPE];
|
|
mediaGroupType[entry.attributes['GROUP-ID']] = mediaGroupType[entry.attributes['GROUP-ID']] || {};
|
|
mediaGroup = mediaGroupType[entry.attributes['GROUP-ID']]; // collect the rendition metadata
|
|
|
|
rendition = {
|
|
default: /yes/i.test(entry.attributes.DEFAULT)
|
|
};
|
|
|
|
if (rendition.default) {
|
|
rendition.autoselect = true;
|
|
} else {
|
|
rendition.autoselect = /yes/i.test(entry.attributes.AUTOSELECT);
|
|
}
|
|
|
|
if (entry.attributes.LANGUAGE) {
|
|
rendition.language = entry.attributes.LANGUAGE;
|
|
}
|
|
|
|
if (entry.attributes.URI) {
|
|
rendition.uri = entry.attributes.URI;
|
|
}
|
|
|
|
if (entry.attributes['INSTREAM-ID']) {
|
|
rendition.instreamId = entry.attributes['INSTREAM-ID'];
|
|
}
|
|
|
|
if (entry.attributes.CHARACTERISTICS) {
|
|
rendition.characteristics = entry.attributes.CHARACTERISTICS;
|
|
}
|
|
|
|
if (entry.attributes.FORCED) {
|
|
rendition.forced = /yes/i.test(entry.attributes.FORCED);
|
|
} // insert the new rendition
|
|
|
|
|
|
mediaGroup[entry.attributes.NAME] = rendition;
|
|
},
|
|
discontinuity: function discontinuity() {
|
|
currentTimeline += 1;
|
|
currentUri.discontinuity = true;
|
|
this.manifest.discontinuityStarts.push(uris.length);
|
|
},
|
|
'program-date-time': function programDateTime() {
|
|
if (typeof this.manifest.dateTimeString === 'undefined') {
|
|
// PROGRAM-DATE-TIME is a media-segment tag, but for backwards
|
|
// compatibility, we add the first occurence of the PROGRAM-DATE-TIME tag
|
|
// to the manifest object
|
|
// TODO: Consider removing this in future major version
|
|
this.manifest.dateTimeString = entry.dateTimeString;
|
|
this.manifest.dateTimeObject = entry.dateTimeObject;
|
|
}
|
|
|
|
currentUri.dateTimeString = entry.dateTimeString;
|
|
currentUri.dateTimeObject = entry.dateTimeObject;
|
|
},
|
|
targetduration: function targetduration() {
|
|
if (!isFinite(entry.duration) || entry.duration < 0) {
|
|
this.trigger('warn', {
|
|
message: 'ignoring invalid target duration: ' + entry.duration
|
|
});
|
|
return;
|
|
}
|
|
|
|
this.manifest.targetDuration = entry.duration;
|
|
},
|
|
totalduration: function totalduration() {
|
|
if (!isFinite(entry.duration) || entry.duration < 0) {
|
|
this.trigger('warn', {
|
|
message: 'ignoring invalid total duration: ' + entry.duration
|
|
});
|
|
return;
|
|
}
|
|
|
|
this.manifest.totalDuration = entry.duration;
|
|
},
|
|
start: function start() {
|
|
if (!entry.attributes || isNaN(entry.attributes['TIME-OFFSET'])) {
|
|
this.trigger('warn', {
|
|
message: 'ignoring start declaration without appropriate attribute list'
|
|
});
|
|
return;
|
|
}
|
|
|
|
this.manifest.start = {
|
|
timeOffset: entry.attributes['TIME-OFFSET'],
|
|
precise: entry.attributes.PRECISE
|
|
};
|
|
},
|
|
'cue-out': function cueOut() {
|
|
currentUri.cueOut = entry.data;
|
|
},
|
|
'cue-out-cont': function cueOutCont() {
|
|
currentUri.cueOutCont = entry.data;
|
|
},
|
|
'cue-in': function cueIn() {
|
|
currentUri.cueIn = entry.data;
|
|
}
|
|
})[entry.tagType] || noop).call(self);
|
|
},
|
|
uri: function uri() {
|
|
currentUri.uri = entry.uri;
|
|
uris.push(currentUri); // if no explicit duration was declared, use the target duration
|
|
|
|
if (this.manifest.targetDuration && !('duration' in currentUri)) {
|
|
this.trigger('warn', {
|
|
message: 'defaulting segment duration to the target duration'
|
|
});
|
|
currentUri.duration = this.manifest.targetDuration;
|
|
} // annotate with encryption information, if necessary
|
|
|
|
|
|
if (_key) {
|
|
currentUri.key = _key;
|
|
}
|
|
|
|
currentUri.timeline = currentTimeline; // annotate with initialization segment information, if necessary
|
|
|
|
if (currentMap) {
|
|
currentUri.map = currentMap;
|
|
} // prepare for the next URI
|
|
|
|
|
|
currentUri = {};
|
|
},
|
|
comment: function comment() {// comments are not important for playback
|
|
},
|
|
custom: function custom() {
|
|
// if this is segment-level data attach the output to the segment
|
|
if (entry.segment) {
|
|
currentUri.custom = currentUri.custom || {};
|
|
currentUri.custom[entry.customType] = entry.data; // if this is manifest-level data attach to the top level manifest object
|
|
} else {
|
|
this.manifest.custom = this.manifest.custom || {};
|
|
this.manifest.custom[entry.customType] = entry.data;
|
|
}
|
|
}
|
|
})[entry.type].call(self);
|
|
});
|
|
|
|
return _this;
|
|
}
|
|
/**
|
|
* Parse the input string and update the manifest object.
|
|
*
|
|
* @param {string} chunk a potentially incomplete portion of the manifest
|
|
*/
|
|
|
|
|
|
var _proto = Parser.prototype;
|
|
|
|
_proto.push = function push(chunk) {
|
|
this.lineStream.push(chunk);
|
|
}
|
|
/**
|
|
* Flush any remaining input. This can be handy if the last line of an M3U8
|
|
* manifest did not contain a trailing newline but the file has been
|
|
* completely received.
|
|
*/
|
|
;
|
|
|
|
_proto.end = function end() {
|
|
// flush any buffered input
|
|
this.lineStream.push('\n');
|
|
}
|
|
/**
|
|
* Add an additional parser for non-standard tags
|
|
*
|
|
* @param {Object} options a map of options for the added parser
|
|
* @param {RegExp} options.expression a regular expression to match the custom header
|
|
* @param {string} options.type the type to register to the output
|
|
* @param {Function} [options.dataParser] function to parse the line into an object
|
|
* @param {boolean} [options.segment] should tag data be attached to the segment object
|
|
*/
|
|
;
|
|
|
|
_proto.addParser = function addParser(options) {
|
|
this.parseStream.addParser(options);
|
|
}
|
|
/**
|
|
* Add a custom header mapper
|
|
*
|
|
* @param {Object} options
|
|
* @param {RegExp} options.expression a regular expression to match the custom header
|
|
* @param {Function} options.map function to translate tag into a different tag
|
|
*/
|
|
;
|
|
|
|
_proto.addTagMapper = function addTagMapper(options) {
|
|
this.parseStream.addTagMapper(options);
|
|
};
|
|
|
|
return Parser;
|
|
}(Stream);
|
|
|
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export { LineStream, ParseStream, Parser };
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