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a8daa7f7 by David LaPalomento
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Merge pull request #539 from BrandonOCasey/seperate-m3u8-files 

moved all m3u8 classes into their own file
2 parents d7019d06 54afda49
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Showing 4 changed files with 584 additions and 576 deletions
......@@ -6,582 +6,9 @@
* ReadableStream-like interface.
*/
import Stream from '../stream';
import {mergeOptions} from 'video.js';
/**
* A stream that buffers string input and generates a `data` event for each
* line.
*/
export class LineStream extends Stream {
constructor() {
super();
this.buffer = '';
}
/**
* Add new data to be parsed.
* @param data {string} the text to process
*/
push(data) {
let nextNewline;
this.buffer += data;
nextNewline = this.buffer.indexOf('\n');
for (; nextNewline > -1; nextNewline = this.buffer.indexOf('\n')) {
this.trigger('data', this.buffer.substring(0, nextNewline));
this.buffer = this.buffer.substring(nextNewline + 1);
}
}
}
// "forgiving" attribute list psuedo-grammar:
// attributes -> keyvalue (',' keyvalue)*
// keyvalue -> key '=' value
// key -> [^=]*
// value -> '"' [^"]* '"' | [^,]*
const attributeSeparator = function() {
let key = '[^=]*';
let value = '"[^"]*"|[^,]*';
let keyvalue = '(?:' + key + ')=(?:' + value + ')';
return new RegExp('(?:^|,)(' + keyvalue + ')');
};
const parseAttributes = function(attributes) {
// split the string using attributes as the separator
let attrs = attributes.split(attributeSeparator());
let i = attrs.length;
let result = {};
let attr;
while (i--) {
// filter out unmatched portions of the string
if (attrs[i] === '') {
continue;
}
// split the key and value
attr = (/([^=]*)=(.*)/).exec(attrs[i]).slice(1);
// trim whitespace and remove optional quotes around the value
attr[0] = attr[0].replace(/^\s+|\s+$/g, '');
attr[1] = attr[1].replace(/^\s+|\s+$/g, '');
attr[1] = attr[1].replace(/^['"](.*)['"]$/g, '$1');
result[attr[0]] = attr[1];
}
return result;
};
/**
* A line-level M3U8 parser event stream. It expects to receive input one
* line at a time and performs a context-free parse of its contents. A stream
* interpretation of a manifest can be useful if the manifest is expected to
* be too large to fit comfortably into memory or the entirety of the input
* is not immediately available. Otherwise, it's probably much easier to work
* with a regular `Parser` object.
*
* Produces `data` events with an object that captures the parser's
* interpretation of the input. That object has a property `tag` that is one
* of `uri`, `comment`, or `tag`. URIs only have a single additional
* property, `line`, which captures the entirety of the input without
* interpretation. Comments similarly have a single additional property
* `text` which is the input without the leading `#`.
*
* Tags always have a property `tagType` which is the lower-cased version of
* the M3U8 directive without the `#EXT` or `#EXT-X-` prefix. For instance,
* `#EXT-X-MEDIA-SEQUENCE` becomes `media-sequence` when parsed. Unrecognized
* tags are given the tag type `unknown` and a single additional property
* `data` with the remainder of the input.
*/
export class ParseStream extends Stream {
constructor() {
super();
}
/**
* Parses an additional line of input.
* @param line {string} a single line of an M3U8 file to parse
*/
push(line) {
let match;
let event;
// strip whitespace
line = line.replace(/^[\u0000\s]+|[\u0000\s]+$/g, '');
if (line.length === 0) {
// ignore empty lines
return;
}
// URIs
if (line[0] !== '#') {
this.trigger('data', {
type: 'uri',
uri: line
});
return;
}
// Comments
if (line.indexOf('#EXT') !== 0) {
this.trigger('data', {
type: 'comment',
text: line.slice(1)
});
return;
}
// strip off any carriage returns here so the regex matching
// doesn't have to account for them.
line = line.replace('\r', '');
// Tags
match = (/^#EXTM3U/).exec(line);
if (match) {
this.trigger('data', {
type: 'tag',
tagType: 'm3u'
});
return;
}
match = (/^#EXTINF:?([0-9\.]*)?,?(.*)?$/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'inf'
};
if (match[1]) {
event.duration = parseFloat(match[1]);
}
if (match[2]) {
event.title = match[2];
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-TARGETDURATION:?([0-9.]*)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'targetduration'
};
if (match[1]) {
event.duration = parseInt(match[1], 10);
}
this.trigger('data', event);
return;
}
match = (/^#ZEN-TOTAL-DURATION:?([0-9.]*)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'totalduration'
};
if (match[1]) {
event.duration = parseInt(match[1], 10);
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-VERSION:?([0-9.]*)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'version'
};
if (match[1]) {
event.version = parseInt(match[1], 10);
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-MEDIA-SEQUENCE:?(\-?[0-9.]*)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'media-sequence'
};
if (match[1]) {
event.number = parseInt(match[1], 10);
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-DISCONTINUITY-SEQUENCE:?(\-?[0-9.]*)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'discontinuity-sequence'
};
if (match[1]) {
event.number = parseInt(match[1], 10);
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-PLAYLIST-TYPE:?(.*)?$/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'playlist-type'
};
if (match[1]) {
event.playlistType = match[1];
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-BYTERANGE:?([0-9.]*)?@?([0-9.]*)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'byterange'
};
if (match[1]) {
event.length = parseInt(match[1], 10);
}
if (match[2]) {
event.offset = parseInt(match[2], 10);
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-ALLOW-CACHE:?(YES|NO)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'allow-cache'
};
if (match[1]) {
event.allowed = !(/NO/).test(match[1]);
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-STREAM-INF:?(.*)$/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'stream-inf'
};
if (match[1]) {
event.attributes = parseAttributes(match[1]);
if (event.attributes.RESOLUTION) {
let split = event.attributes.RESOLUTION.split('x');
let resolution = {};
if (split[0]) {
resolution.width = parseInt(split[0], 10);
}
if (split[1]) {
resolution.height = parseInt(split[1], 10);
}
event.attributes.RESOLUTION = resolution;
}
if (event.attributes.BANDWIDTH) {
event.attributes.BANDWIDTH = parseInt(event.attributes.BANDWIDTH, 10);
}
if (event.attributes['PROGRAM-ID']) {
event.attributes['PROGRAM-ID'] = parseInt(event.attributes['PROGRAM-ID'], 10);
}
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-ENDLIST/).exec(line);
if (match) {
this.trigger('data', {
type: 'tag',
tagType: 'endlist'
});
return;
}
match = (/^#EXT-X-DISCONTINUITY/).exec(line);
if (match) {
this.trigger('data', {
type: 'tag',
tagType: 'discontinuity'
});
return;
}
match = (/^#EXT-X-KEY:?(.*)$/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'key'
};
if (match[1]) {
event.attributes = parseAttributes(match[1]);
// parse the IV string into a Uint32Array
if (event.attributes.IV) {
if (event.attributes.IV.substring(0, 2) === '0x') {
event.attributes.IV = event.attributes.IV.substring(2);
}
event.attributes.IV = event.attributes.IV.match(/.{8}/g);
event.attributes.IV[0] = parseInt(event.attributes.IV[0], 16);
event.attributes.IV[1] = parseInt(event.attributes.IV[1], 16);
event.attributes.IV[2] = parseInt(event.attributes.IV[2], 16);
event.attributes.IV[3] = parseInt(event.attributes.IV[3], 16);
event.attributes.IV = new Uint32Array(event.attributes.IV);
}
}
this.trigger('data', event);
return;
}
// unknown tag type
this.trigger('data', {
type: 'tag',
data: line.slice(4, line.length)
});
}
}
/**
* 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 videojs.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.
*/
export class Parser extends Stream {
constructor() {
super();
this.lineStream = new LineStream();
this.parseStream = new ParseStream();
this.lineStream.pipe(this.parseStream);
/* eslint-disable consistent-this */
let self = this;
/* eslint-enable consistent-this */
let uris = [];
let currentUri = {};
let key;
let noop = function() {};
// the manifest is empty until the parse stream begins delivering data
this.manifest = {
allowCache: true,
discontinuityStarts: []
};
// update the manifest with the m3u8 entry from the parse stream
this.parseStream.on('data', function(entry) {
({
tag() {
// switch based on the tag type
(({
'allow-cache'() {
this.manifest.allowCache = entry.allowed;
if (!('allowed' in entry)) {
this.trigger('info', {
message: 'defaulting allowCache to YES'
});
this.manifest.allowCache = true;
}
},
byterange() {
let byterange = {};
if ('length' in entry) {
currentUri.byterange = byterange;
byterange.length = entry.length;
if (!('offset' in entry)) {
this.trigger('info', {
message: 'defaulting offset to zero'
});
entry.offset = 0;
}
}
if ('offset' in entry) {
currentUri.byterange = byterange;
byterange.offset = entry.offset;
}
},
endlist() {
this.manifest.endList = true;
},
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;
}
this.manifest.segments = uris;
},
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;
}
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'() {
if (!isFinite(entry.number)) {
this.trigger('warn', {
message: 'ignoring invalid media sequence: ' + entry.number
});
return;
}
this.manifest.mediaSequence = entry.number;
},
'discontinuity-sequence'() {
if (!isFinite(entry.number)) {
this.trigger('warn', {
message: 'ignoring invalid discontinuity sequence: ' + entry.number
});
return;
}
this.manifest.discontinuitySequence = entry.number;
},
'playlist-type'() {
if (!(/VOD|EVENT/).test(entry.playlistType)) {
this.trigger('warn', {
message: 'ignoring unknown playlist type: ' + entry.playlist
});
return;
}
this.manifest.playlistType = entry.playlistType;
},
'stream-inf'() {
this.manifest.playlists = uris;
if (!entry.attributes) {
this.trigger('warn', {
message: 'ignoring empty stream-inf attributes'
});
return;
}
if (!currentUri.attributes) {
currentUri.attributes = {};
}
currentUri.attributes = mergeOptions(currentUri.attributes,
entry.attributes);
},
discontinuity() {
currentUri.discontinuity = true;
this.manifest.discontinuityStarts.push(uris.length);
},
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() {
if (!isFinite(entry.duration) || entry.duration < 0) {
this.trigger('warn', {
message: 'ignoring invalid total duration: ' + entry.duration
});
return;
}
this.manifest.totalDuration = entry.duration;
}
})[entry.tagType] || noop).call(self);
},
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;
}
// prepare for the next URI
currentUri = {};
},
comment() {
// comments are not important for playback
}
})[entry.type].call(self);
});
}
/**
* Parse the input string and update the manifest object.
* @param chunk {string} a potentially incomplete portion of the manifest
*/
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.
*/
end() {
// flush any buffered input
this.lineStream.push('\n');
}
}
import LineStream from './line-stream';
import ParseStream from './parse-stream';
import Parser from './parser';
export default {
LineStream,
......
import Stream from '../stream';
/**
* A stream that buffers string input and generates a `data` event for each
* line.
*/
export default class LineStream extends Stream {
constructor() {
super();
this.buffer = '';
}
/**
* Add new data to be parsed.
* @param data {string} the text to process
*/
push(data) {
let nextNewline;
this.buffer += data;
nextNewline = this.buffer.indexOf('\n');
for (; nextNewline > -1; nextNewline = this.buffer.indexOf('\n')) {
this.trigger('data', this.buffer.substring(0, nextNewline));
this.buffer = this.buffer.substring(nextNewline + 1);
}
}
}
import Stream from '../stream';
// "forgiving" attribute list psuedo-grammar:
// attributes -> keyvalue (',' keyvalue)*
// keyvalue -> key '=' value
// key -> [^=]*
// value -> '"' [^"]* '"' | [^,]*
const attributeSeparator = function() {
let key = '[^=]*';
let value = '"[^"]*"|[^,]*';
let keyvalue = '(?:' + key + ')=(?:' + value + ')';
return new RegExp('(?:^|,)(' + keyvalue + ')');
};
const parseAttributes = function(attributes) {
// split the string using attributes as the separator
let attrs = attributes.split(attributeSeparator());
let i = attrs.length;
let result = {};
let attr;
while (i--) {
// filter out unmatched portions of the string
if (attrs[i] === '') {
continue;
}
// split the key and value
attr = (/([^=]*)=(.*)/).exec(attrs[i]).slice(1);
// trim whitespace and remove optional quotes around the value
attr[0] = attr[0].replace(/^\s+|\s+$/g, '');
attr[1] = attr[1].replace(/^\s+|\s+$/g, '');
attr[1] = attr[1].replace(/^['"](.*)['"]$/g, '$1');
result[attr[0]] = attr[1];
}
return result;
};
/**
* A line-level M3U8 parser event stream. It expects to receive input one
* line at a time and performs a context-free parse of its contents. A stream
* interpretation of a manifest can be useful if the manifest is expected to
* be too large to fit comfortably into memory or the entirety of the input
* is not immediately available. Otherwise, it's probably much easier to work
* with a regular `Parser` object.
*
* Produces `data` events with an object that captures the parser's
* interpretation of the input. That object has a property `tag` that is one
* of `uri`, `comment`, or `tag`. URIs only have a single additional
* property, `line`, which captures the entirety of the input without
* interpretation. Comments similarly have a single additional property
* `text` which is the input without the leading `#`.
*
* Tags always have a property `tagType` which is the lower-cased version of
* the M3U8 directive without the `#EXT` or `#EXT-X-` prefix. For instance,
* `#EXT-X-MEDIA-SEQUENCE` becomes `media-sequence` when parsed. Unrecognized
* tags are given the tag type `unknown` and a single additional property
* `data` with the remainder of the input.
*/
export default class ParseStream extends Stream {
constructor() {
super();
}
/**
* Parses an additional line of input.
* @param line {string} a single line of an M3U8 file to parse
*/
push(line) {
let match;
let event;
// strip whitespace
line = line.replace(/^[\u0000\s]+|[\u0000\s]+$/g, '');
if (line.length === 0) {
// ignore empty lines
return;
}
// URIs
if (line[0] !== '#') {
this.trigger('data', {
type: 'uri',
uri: line
});
return;
}
// Comments
if (line.indexOf('#EXT') !== 0) {
this.trigger('data', {
type: 'comment',
text: line.slice(1)
});
return;
}
// strip off any carriage returns here so the regex matching
// doesn't have to account for them.
line = line.replace('\r', '');
// Tags
match = (/^#EXTM3U/).exec(line);
if (match) {
this.trigger('data', {
type: 'tag',
tagType: 'm3u'
});
return;
}
match = (/^#EXTINF:?([0-9\.]*)?,?(.*)?$/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'inf'
};
if (match[1]) {
event.duration = parseFloat(match[1]);
}
if (match[2]) {
event.title = match[2];
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-TARGETDURATION:?([0-9.]*)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'targetduration'
};
if (match[1]) {
event.duration = parseInt(match[1], 10);
}
this.trigger('data', event);
return;
}
match = (/^#ZEN-TOTAL-DURATION:?([0-9.]*)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'totalduration'
};
if (match[1]) {
event.duration = parseInt(match[1], 10);
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-VERSION:?([0-9.]*)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'version'
};
if (match[1]) {
event.version = parseInt(match[1], 10);
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-MEDIA-SEQUENCE:?(\-?[0-9.]*)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'media-sequence'
};
if (match[1]) {
event.number = parseInt(match[1], 10);
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-DISCONTINUITY-SEQUENCE:?(\-?[0-9.]*)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'discontinuity-sequence'
};
if (match[1]) {
event.number = parseInt(match[1], 10);
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-PLAYLIST-TYPE:?(.*)?$/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'playlist-type'
};
if (match[1]) {
event.playlistType = match[1];
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-BYTERANGE:?([0-9.]*)?@?([0-9.]*)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'byterange'
};
if (match[1]) {
event.length = parseInt(match[1], 10);
}
if (match[2]) {
event.offset = parseInt(match[2], 10);
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-ALLOW-CACHE:?(YES|NO)?/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'allow-cache'
};
if (match[1]) {
event.allowed = !(/NO/).test(match[1]);
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-STREAM-INF:?(.*)$/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'stream-inf'
};
if (match[1]) {
event.attributes = parseAttributes(match[1]);
if (event.attributes.RESOLUTION) {
let split = event.attributes.RESOLUTION.split('x');
let resolution = {};
if (split[0]) {
resolution.width = parseInt(split[0], 10);
}
if (split[1]) {
resolution.height = parseInt(split[1], 10);
}
event.attributes.RESOLUTION = resolution;
}
if (event.attributes.BANDWIDTH) {
event.attributes.BANDWIDTH = parseInt(event.attributes.BANDWIDTH, 10);
}
if (event.attributes['PROGRAM-ID']) {
event.attributes['PROGRAM-ID'] = parseInt(event.attributes['PROGRAM-ID'], 10);
}
}
this.trigger('data', event);
return;
}
match = (/^#EXT-X-ENDLIST/).exec(line);
if (match) {
this.trigger('data', {
type: 'tag',
tagType: 'endlist'
});
return;
}
match = (/^#EXT-X-DISCONTINUITY/).exec(line);
if (match) {
this.trigger('data', {
type: 'tag',
tagType: 'discontinuity'
});
return;
}
match = (/^#EXT-X-KEY:?(.*)$/).exec(line);
if (match) {
event = {
type: 'tag',
tagType: 'key'
};
if (match[1]) {
event.attributes = parseAttributes(match[1]);
// parse the IV string into a Uint32Array
if (event.attributes.IV) {
if (event.attributes.IV.substring(0, 2) === '0x') {
event.attributes.IV = event.attributes.IV.substring(2);
}
event.attributes.IV = event.attributes.IV.match(/.{8}/g);
event.attributes.IV[0] = parseInt(event.attributes.IV[0], 16);
event.attributes.IV[1] = parseInt(event.attributes.IV[1], 16);
event.attributes.IV[2] = parseInt(event.attributes.IV[2], 16);
event.attributes.IV[3] = parseInt(event.attributes.IV[3], 16);
event.attributes.IV = new Uint32Array(event.attributes.IV);
}
}
this.trigger('data', event);
return;
}
// unknown tag type
this.trigger('data', {
type: 'tag',
data: line.slice(4, line.length)
});
}
}
import Stream from '../stream' ;
import LineStream from './line-stream';
import ParseStream from './parse-stream';
import {mergeOptions} from 'video.js';
/**
* 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 videojs.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.
*/
export default class Parser extends Stream {
constructor() {
super();
this.lineStream = new LineStream();
this.parseStream = new ParseStream();
this.lineStream.pipe(this.parseStream);
/* eslint-disable consistent-this */
let self = this;
/* eslint-enable consistent-this */
let uris = [];
let currentUri = {};
let key;
let noop = function() {};
// the manifest is empty until the parse stream begins delivering data
this.manifest = {
allowCache: true,
discontinuityStarts: []
};
// update the manifest with the m3u8 entry from the parse stream
this.parseStream.on('data', function(entry) {
({
tag() {
// switch based on the tag type
(({
'allow-cache'() {
this.manifest.allowCache = entry.allowed;
if (!('allowed' in entry)) {
this.trigger('info', {
message: 'defaulting allowCache to YES'
});
this.manifest.allowCache = true;
}
},
byterange() {
let byterange = {};
if ('length' in entry) {
currentUri.byterange = byterange;
byterange.length = entry.length;
if (!('offset' in entry)) {
this.trigger('info', {
message: 'defaulting offset to zero'
});
entry.offset = 0;
}
}
if ('offset' in entry) {
currentUri.byterange = byterange;
byterange.offset = entry.offset;
}
},
endlist() {
this.manifest.endList = true;
},
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;
}
this.manifest.segments = uris;
},
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;
}
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'() {
if (!isFinite(entry.number)) {
this.trigger('warn', {
message: 'ignoring invalid media sequence: ' + entry.number
});
return;
}
this.manifest.mediaSequence = entry.number;
},
'discontinuity-sequence'() {
if (!isFinite(entry.number)) {
this.trigger('warn', {
message: 'ignoring invalid discontinuity sequence: ' + entry.number
});
return;
}
this.manifest.discontinuitySequence = entry.number;
},
'playlist-type'() {
if (!(/VOD|EVENT/).test(entry.playlistType)) {
this.trigger('warn', {
message: 'ignoring unknown playlist type: ' + entry.playlist
});
return;
}
this.manifest.playlistType = entry.playlistType;
},
'stream-inf'() {
this.manifest.playlists = uris;
if (!entry.attributes) {
this.trigger('warn', {
message: 'ignoring empty stream-inf attributes'
});
return;
}
if (!currentUri.attributes) {
currentUri.attributes = {};
}
currentUri.attributes = mergeOptions(currentUri.attributes,
entry.attributes);
},
discontinuity() {
currentUri.discontinuity = true;
this.manifest.discontinuityStarts.push(uris.length);
},
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() {
if (!isFinite(entry.duration) || entry.duration < 0) {
this.trigger('warn', {
message: 'ignoring invalid total duration: ' + entry.duration
});
return;
}
this.manifest.totalDuration = entry.duration;
}
})[entry.tagType] || noop).call(self);
},
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;
}
// prepare for the next URI
currentUri = {};
},
comment() {
// comments are not important for playback
}
})[entry.type].call(self);
});
}
/**
* Parse the input string and update the manifest object.
* @param chunk {string} a potentially incomplete portion of the manifest
*/
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.
*/
end() {
// flush any buffered input
this.lineStream.push('\n');
}
}