'use strict';
import window from 'global/window';
import mejs from '../core/mejs';
import {renderer} from '../core/renderer';
import {createEvent} from '../utils/general';
import {HAS_MSE} from '../utils/constants';
import {typeChecks} from '../utils/media';
import {loadScript} from '../utils/dom';
/**
* Native FLV renderer
*
* Uses flv.js, which is a JavaScript library which implements mechanisms to play flv files inspired by flv.js.
* It relies on HTML5 video and MediaSource Extensions for playback.
* Currently, it can only play files with the same origin.
*
* @see https://github.com/Bilibili/flv.js
*
*/
const NativeFlv = {
promise: null,
/**
* Create a queue to prepare the loading of an FLV source
* @param {Object} settings - an object with settings needed to load an FLV player instance
*/
load: (settings) => {
if (typeof flvjs !== 'undefined') {
NativeFlv.promise = new Promise((resolve) => {
resolve();
}).then(() => {
NativeFlv._createPlayer(settings);
});
} else {
settings.options.path = typeof settings.options.path === 'string' ?
settings.options.path : 'https://cdn.jsdelivr.net/npm/flv.js@latest';
NativeFlv.promise = NativeFlv.promise || loadScript(settings.options.path);
NativeFlv.promise.then(() => {
NativeFlv._createPlayer(settings);
});
}
return NativeFlv.promise;
},
/**
* Create a new instance of FLV player and trigger a custom event to initialize it
*
* @param {Object} settings - an object with settings needed to instantiate FLV object
*/
_createPlayer: (settings) => {
flvjs.LoggingControl.enableDebug = settings.options.debug;
flvjs.LoggingControl.enableVerbose = settings.options.debug;
const player = flvjs.createPlayer(settings.options, settings.configs);
window[`__ready__${settings.id}`](player);
return player;
}
};
const FlvNativeRenderer = {
name: 'native_flv',
options: {
prefix: 'native_flv',
flv: {
// Special config: used to set the local path/URL of flv.js library
path: 'https://cdn.jsdelivr.net/npm/flv.js@latest',
// To modify more elements from FLV player,
// see https://github.com/Bilibili/flv.js/blob/master/docs/api.md#config
cors: true,
debug: false
}
},
/**
* Determine if a specific element type can be played with this render
*
* @param {String} type
* @return {Boolean}
*/
canPlayType: (type) => HAS_MSE && ['video/x-flv', 'video/flv'].indexOf(type.toLowerCase()) > -1,
/**
* Create the player instance and add all native events/methods/properties as possible
*
* @param {MediaElement} mediaElement Instance of mejs.MediaElement already created
* @param {Object} options All the player configuration options passed through constructor
* @param {Object[]} mediaFiles List of sources with format: {src: url, type: x/y-z}
* @return {Object}
*/
create: (mediaElement, options, mediaFiles) => {
const
originalNode = mediaElement.originalNode,
id = `${mediaElement.id}_${options.prefix}`
;
let
node = null,
flvPlayer = null
;
node = originalNode.cloneNode(true);
options = Object.assign(options, mediaElement.options);
const
props = mejs.html5media.properties,
events = mejs.html5media.events.concat(['click', 'mouseover', 'mouseout']).filter(e => e !== 'error'),
attachNativeEvents = (e) => {
const event = createEvent(e.type, mediaElement);
mediaElement.dispatchEvent(event);
},
assignGettersSetters = (propName) => {
const capName = `${propName.substring(0, 1).toUpperCase()}${propName.substring(1)}`;
node[`get${capName}`] = () => flvPlayer !== null ? node[propName] : null;
node[`set${capName}`] = (value) => {
if (mejs.html5media.readOnlyProperties.indexOf(propName) === -1) {
if (propName === 'src') {
node[propName] = typeof value === 'object' && value.src ? value.src : value;
if (flvPlayer !== null) {
const flvOptions = {};
flvOptions.type = 'flv';
flvOptions.url = value;
flvOptions.cors = options.flv.cors;
flvOptions.debug = options.flv.debug;
flvOptions.path = options.flv.path;
const flvConfigs = options.flv.configs;
flvPlayer.destroy();
for (let i = 0, total = events.length; i < total; i++) {
node.removeEventListener(events[i], attachNativeEvents);
}
flvPlayer = NativeFlv._createPlayer({
options: flvOptions,
configs: flvConfigs,
id: id
});
flvPlayer.attachMediaElement(node);
flvPlayer.load();
}
} else {
node[propName] = value;
}
}
};
}
;
for (let i = 0, total = props.length; i < total; i++) {
assignGettersSetters(props[i]);
}
window['__ready__' + id] = (_flvPlayer) => {
mediaElement.flvPlayer = flvPlayer = _flvPlayer;
const
flvEvents = flvjs.Events,
assignEvents = (eventName) => {
if (eventName === 'loadedmetadata') {
flvPlayer.unload();
flvPlayer.detachMediaElement();
flvPlayer.attachMediaElement(node);
flvPlayer.load();
}
node.addEventListener(eventName, attachNativeEvents);
}
;
for (let i = 0, total = events.length; i < total; i++) {
assignEvents(events[i]);
}
/**
* Custom FLV events
*
* These events can be attached to the original node using addEventListener and the name of the event,
* not using flvjs.Events object
* @see http://cdn.dashjs.org/latest/jsdoc/MediaPlayerEvents.html
*/
const assignFlvEvents = (name, data) => {
if (name === 'error') {
const message = `${data[0]}: ${data[1]} ${data[2].msg}`;
mediaElement.generateError(message, node.src);
} else {
const event = createEvent(name, mediaElement);
event.data = data;
mediaElement.dispatchEvent(event);
}
};
for (const eventType in flvEvents) {
if (flvEvents.hasOwnProperty(eventType)) {
flvPlayer.on(flvEvents[eventType], (...args) => assignFlvEvents(flvEvents[eventType], args));
}
}
};
if (mediaFiles && mediaFiles.length > 0) {
for (let i = 0, total = mediaFiles.length; i < total; i++) {
if (renderer.renderers[options.prefix].canPlayType(mediaFiles[i].type)) {
node.setAttribute('src', mediaFiles[i].src);
break;
}
}
}
node.setAttribute('id', id);
originalNode.parentNode.insertBefore(node, originalNode);
originalNode.autoplay = false;
originalNode.style.display = 'none';
// This approach prevents carrying over unnecessary elements from flv.js
// in case there are multiple instances of the player
const flvOptions = {};
flvOptions.type = 'flv';
flvOptions.url = node.src;
flvOptions.cors = options.flv.cors;
flvOptions.debug = options.flv.debug;
flvOptions.path = options.flv.path;
const flvConfigs = options.flv.configs;
node.setSize = (width, height) => {
node.style.width = `${width}px`;
node.style.height = `${height}px`;
return node;
};
node.hide = () => {
if (flvPlayer !== null) {
flvPlayer.pause();
}
node.style.display = 'none';
return node;
};
node.show = () => {
node.style.display = '';
return node;
};
node.destroy = () => {
if (flvPlayer !== null) {
flvPlayer.destroy();
}
};
const event = createEvent('rendererready', node);
mediaElement.dispatchEvent(event);
mediaElement.promises.push(NativeFlv.load({
options: flvOptions,
configs: flvConfigs,
id: id
}));
return node;
}
};
/**
* Register Native FLV type based on URL structure
*
*/
typeChecks.push((url) => ~(url.toLowerCase()).indexOf('.flv') ? 'video/flv' : null);
renderer.add(FlvNativeRenderer);