import { BaseImageResource } from './BaseImageResource';
import { Ticker } from '@pixi/ticker';
/**
* Resource type for HTMLVideoElement.
* @class
* @extends PIXI.resources.BaseImageResource
* @memberof PIXI.resources
* @param {HTMLVideoElement|object|string|Array<string|object>} source - Video element to use.
* @param {object} [options] - Options to use
* @param {boolean} [options.autoLoad=true] - Start loading the video immediately
* @param {boolean} [options.autoPlay=true] - Start playing video immediately
* @param {number} [options.updateFPS=0] - How many times a second to update the texture from the video.
* Leave at 0 to update at every render.
* @param {boolean} [options.crossorigin=true] - Load image using cross origin
*/
export class VideoResource extends BaseImageResource
{
constructor(source, options)
{
options = options || {};
if (!(source instanceof HTMLVideoElement))
{
const videoElement = document.createElement('video');
// workaround for https://github.com/pixijs/pixi.js/issues/5996
videoElement.setAttribute('preload', 'auto');
videoElement.setAttribute('webkit-playsinline', '');
videoElement.setAttribute('playsinline', '');
if (typeof source === 'string')
{
source = [source];
}
BaseImageResource.crossOrigin(videoElement, (source[0].src || source[0]), options.crossorigin);
// array of objects or strings
for (let i = 0; i < source.length; ++i)
{
const sourceElement = document.createElement('source');
let { src, mime } = source[i];
src = src || source[i];
const baseSrc = src.split('?').shift().toLowerCase();
const ext = baseSrc.substr(baseSrc.lastIndexOf('.') + 1);
mime = mime || `video/${ext}`;
sourceElement.src = src;
sourceElement.type = mime;
videoElement.appendChild(sourceElement);
}
// Override the source
source = videoElement;
}
super(source);
this._autoUpdate = true;
this._isAutoUpdating = false;
this._updateFPS = options.updateFPS || 0;
this._msToNextUpdate = 0;
/**
* When set to true will automatically play videos used by this texture once
* they are loaded. If false, it will not modify the playing state.
*
* @member {boolean}
* @default true
*/
this.autoPlay = options.autoPlay !== false;
/**
* Promise when loading
* @member {Promise<void>}
* @private
* @default null
*/
this._load = null;
/**
* Callback when completed with load.
* @member {function}
* @private
*/
this._resolve = null;
// Bind for listeners
this._onCanPlay = this._onCanPlay.bind(this);
this._onError = this._onError.bind(this);
if (options.autoLoad !== false)
{
this.load();
}
}
/**
* Trigger updating of the texture
*
* @param {number} [deltaTime=0] - time delta since last tick
*/
update(deltaTime = 0)
{
if (!this.destroyed)
{
// account for if video has had its playbackRate changed
const elapsedMS = Ticker.shared.elapsedMS * this.source.playbackRate;
this._msToNextUpdate = Math.floor(this._msToNextUpdate - elapsedMS);
if (!this._updateFPS || this._msToNextUpdate <= 0)
{
super.update(deltaTime);
this._msToNextUpdate = this._updateFPS ? Math.floor(1000 / this._updateFPS) : 0;
}
}
}
/**
* Start preloading the video resource.
*
* @protected
* @return {Promise<void>} Handle the validate event
*/
load()
{
if (this._load)
{
return this._load;
}
const source = this.source;
if ((source.readyState === source.HAVE_ENOUGH_DATA || source.readyState === source.HAVE_FUTURE_DATA)
&& source.width && source.height)
{
source.complete = true;
}
source.addEventListener('play', this._onPlayStart.bind(this));
source.addEventListener('pause', this._onPlayStop.bind(this));
if (!this._isSourceReady())
{
source.addEventListener('canplay', this._onCanPlay);
source.addEventListener('canplaythrough', this._onCanPlay);
source.addEventListener('error', this._onError, true);
}
else
{
this._onCanPlay();
}
this._load = new Promise((resolve) =>
{
if (this.valid)
{
resolve(this);
}
else
{
this._resolve = resolve;
source.load();
}
});
return this._load;
}
/**
* Handle video error events.
*
* @private
*/
_onError()
{
this.source.removeEventListener('error', this._onError, true);
this.onError.run(event);
}
/**
* Returns true if the underlying source is playing.
*
* @private
* @return {boolean} True if playing.
*/
_isSourcePlaying()
{
const source = this.source;
return (source.currentTime > 0 && source.paused === false && source.ended === false && source.readyState > 2);
}
/**
* Returns true if the underlying source is ready for playing.
*
* @private
* @return {boolean} True if ready.
*/
_isSourceReady()
{
return this.source.readyState === 3 || this.source.readyState === 4;
}
/**
* Runs the update loop when the video is ready to play
*
* @private
*/
_onPlayStart()
{
// Just in case the video has not received its can play even yet..
if (!this.valid)
{
this._onCanPlay();
}
if (!this._isAutoUpdating && this.autoUpdate)
{
Ticker.shared.add(this.update, this);
this._isAutoUpdating = true;
}
}
/**
* Fired when a pause event is triggered, stops the update loop
*
* @private
*/
_onPlayStop()
{
if (this._isAutoUpdating)
{
Ticker.shared.remove(this.update, this);
this._isAutoUpdating = false;
}
}
/**
* Fired when the video is loaded and ready to play
*
* @private
*/
_onCanPlay()
{
const { source } = this;
source.removeEventListener('canplay', this._onCanPlay);
source.removeEventListener('canplaythrough', this._onCanPlay);
const valid = this.valid;
this.resize(source.videoWidth, source.videoHeight);
// prevent multiple loaded dispatches..
if (!valid && this._resolve)
{
this._resolve(this);
this._resolve = null;
}
if (this._isSourcePlaying())
{
this._onPlayStart();
}
else if (this.autoPlay)
{
source.play();
}
}
/**
* Destroys this texture
* @override
*/
dispose()
{
if (this._isAutoUpdating)
{
Ticker.shared.remove(this.update, this);
}
if (this.source)
{
this.source.removeEventListener('error', this._onError, true);
this.source.pause();
this.source.src = '';
this.source.load();
}
super.dispose();
}
/**
* Should the base texture automatically update itself, set to true by default
*
* @member {boolean}
*/
get autoUpdate()
{
return this._autoUpdate;
}
set autoUpdate(value) // eslint-disable-line require-jsdoc
{
if (value !== this._autoUpdate)
{
this._autoUpdate = value;
if (!this._autoUpdate && this._isAutoUpdating)
{
Ticker.shared.remove(this.update, this);
this._isAutoUpdating = false;
}
else if (this._autoUpdate && !this._isAutoUpdating)
{
Ticker.shared.add(this.update, this);
this._isAutoUpdating = true;
}
}
}
/**
* How many times a second to update the texture from the video. Leave at 0 to update at every render.
* A lower fps can help performance, as updating the texture at 60fps on a 30ps video may not be efficient.
*
* @member {number}
*/
get updateFPS()
{
return this._updateFPS;
}
set updateFPS(value) // eslint-disable-line require-jsdoc
{
if (value !== this._updateFPS)
{
this._updateFPS = value;
}
}
/**
* Used to auto-detect the type of resource.
*
* @static
* @param {*} source - The source object
* @param {string} extension - The extension of source, if set
* @return {boolean} `true` if video source
*/
static test(source, extension)
{
return (source instanceof HTMLVideoElement)
|| VideoResource.TYPES.indexOf(extension) > -1;
}
}
/**
* List of common video file extensions supported by VideoResource.
* @constant
* @member {Array<string>}
* @static
* @readonly
*/
VideoResource.TYPES = ['mp4', 'm4v', 'webm', 'ogg', 'ogv', 'h264', 'avi', 'mov'];
