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16 KiB
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<title>JSDoc: Source: visual/MovieStim.js</title>
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<h1 class="page-title">Source: visual/MovieStim.js</h1>
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<pre class="prettyprint source linenums"><code>/**
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* Movie Stimulus.
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*
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* @author Alain Pitiot
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* @version 2021.2.0
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* @copyright (c) 2017-2020 Ilixa Ltd. (http://ilixa.com) (c) 2020-2021 Open Science Tools Ltd. (https://opensciencetools.org)
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* @license Distributed under the terms of the MIT License
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*/
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import * as PIXI from "pixi.js-legacy";
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import { PsychoJS } from "../core/PsychoJS.js";
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import { Color } from "../util/Color.js";
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import { ColorMixin } from "../util/ColorMixin.js";
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import { to_pixiPoint } from "../util/Pixi.js";
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import * as util from "../util/Util.js";
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import { VisualStim } from "./VisualStim.js";
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import {Camera} from "./Camera.js";
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/**
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* Movie Stimulus.
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*
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* @name module:visual.MovieStim
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* @class
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* @extends VisualStim
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* @param {Object} options
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* @param {String} options.name - the name used when logging messages from this stimulus
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* @param {module:core.Window} options.win - the associated Window
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* @param {string | HTMLVideoElement | module:visual.Camera} movie - the name of a
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* movie resource or of a HTMLVideoElement or of a Camera component
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* @param {string} [options.units= "norm"] - the units of the stimulus (e.g. for size, position, vertices)
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* @param {Array.<number>} [options.pos= [0, 0]] - the position of the center of the stimulus
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* @param {string} [options.units= 'norm'] - the units of the stimulus vertices, size and position
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* @param {number} [options.ori= 0.0] - the orientation (in degrees)
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* @param {number} [options.size] - the size of the rendered image (the size of the image will be used if size is not specified)
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* @param {Color} [options.color= Color('white')] the background color
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* @param {number} [options.opacity= 1.0] - the opacity
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* @param {number} [options.contrast= 1.0] - the contrast
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* @param {boolean} [options.interpolate= false] - whether or not the image is interpolated
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* @param {boolean} [options.flipHoriz= false] - whether or not to flip horizontally
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* @param {boolean} [options.flipVert= false] - whether or not to flip vertically
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* @param {boolean} [options.loop= false] - whether or not to loop the movie
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* @param {number} [options.volume= 1.0] - the volume of the audio track (must be between 0.0 and 1.0)
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* @param {boolean} [options.noAudio= false] - whether or not to play the audio
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* @param {boolean} [options.autoPlay= true] - whether or not to autoplay the video
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* @param {boolean} [options.autoDraw= false] - whether or not the stimulus should be automatically drawn on every frame flip
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* @param {boolean} [options.autoLog= false] - whether or not to log
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*
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* @todo autoPlay does not work for the moment.
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*/
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export class MovieStim extends VisualStim
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{
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constructor({ name, win, movie, pos, units, ori, size, color, opacity, contrast, interpolate, flipHoriz, flipVert, loop, volume, noAudio, autoPlay, autoDraw, autoLog } = {})
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{
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super({ name, win, units, ori, opacity, pos, size, autoDraw, autoLog });
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this.psychoJS.logger.debug("create a new MovieStim with name: ", name);
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// movie and movie control:
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this._addAttribute(
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"movie",
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movie,
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);
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this._addAttribute(
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"volume",
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volume,
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1.0,
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this._onChange(false, false),
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);
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this._addAttribute(
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"noAudio",
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noAudio,
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false,
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this._onChange(false, false),
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);
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this._addAttribute(
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"autoPlay",
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autoPlay,
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true,
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this._onChange(false, false),
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);
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this._addAttribute(
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"flipHoriz",
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flipHoriz,
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false,
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this._onChange(false, false),
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);
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this._addAttribute(
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"flipVert",
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flipVert,
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false,
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this._onChange(false, false),
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);
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this._addAttribute(
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"interpolate",
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interpolate,
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false,
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this._onChange(true, false),
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);
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// colors:
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this._addAttribute(
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"color",
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color,
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"white",
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this._onChange(true, false),
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);
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this._addAttribute(
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"contrast",
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contrast,
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1.0,
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this._onChange(true, false),
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);
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this._addAttribute(
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"loop",
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loop,
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false,
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this._onChange(false, false),
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);
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// estimate the bounding box:
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this._estimateBoundingBox();
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// check whether the fastSeek method on HTMLVideoElement is implemented:
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const videoElement = document.createElement("video");
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this._hasFastSeek = (typeof videoElement.fastSeek === "function");
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if (this._autoLog)
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{
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this._psychoJS.experimentLogger.exp(`Created ${this.name} = ${this.toString()}`);
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}
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}
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/**
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* Setter for the movie attribute.
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*
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* @name module:visual.MovieStim#setMovie
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* @public
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* @param {string | HTMLVideoElement | module:visual.Camera} movie - the name of a
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* movie resource or of a HTMLVideoElement or of a Camera component
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* @param {boolean} [log= false] - whether of not to log
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*/
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setMovie(movie, log = false)
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{
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const response = {
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origin: "MovieStim.setMovie",
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context: "when setting the movie of MovieStim: " + this._name,
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};
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try
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{
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// movie is undefined: that's fine but we raise a warning in case this is
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// a symptom of an actual problem
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if (typeof movie === 'undefined')
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{
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this.psychoJS.logger.warn(
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`setting the movie of MovieStim: ${this._name} with argument: undefined.`);
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this.psychoJS.logger.debug(`set the movie of MovieStim: ${this._name} as: undefined`);
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}
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else
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{
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// if movie is a string, then it should be the name of a resource, which we get:
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if (typeof movie === "string")
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{
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movie = this.psychoJS.serverManager.getResource(movie);
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}
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// if movie is an instance of camera, get a video element from it:
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else if (movie instanceof Camera)
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{
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const video = movie.getVideo();
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// TODO remove previous one if there is one
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// document.body.appendChild(video);
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movie = video;
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}
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// check that movie is now an HTMLVideoElement
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if (!(movie instanceof HTMLVideoElement))
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{
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throw movie.toString() + " is not a video";
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}
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this.psychoJS.logger.debug(`set the movie of MovieStim: ${this._name} as: src= ${movie.src}, size= ${movie.videoWidth}x${movie.videoHeight}, duration= ${movie.duration}s`);
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// ensure we have only one onended listener per HTMLVideoElement, since we can have several
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// MovieStim with the same underlying HTMLVideoElement
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// https://stackoverflow.com/questions/11455515
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if (!movie.onended)
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{
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movie.onended = () =>
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{
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this.status = PsychoJS.Status.FINISHED;
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};
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}
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}
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this._setAttribute("movie", movie, log);
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this._needUpdate = true;
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this._needPixiUpdate = true;
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}
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catch (error)
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{
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throw Object.assign(response, { error });
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}
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}
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/**
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* Reset the stimulus.
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*
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* @param {boolean} [log= false] - whether of not to log
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*/
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reset(log = false)
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{
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this.status = PsychoJS.Status.NOT_STARTED;
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this._movie.pause();
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this.seek(0, log);
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}
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/**
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* Start playing the movie.
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*
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* @param {boolean} [log= false] - whether of not to log
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*/
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play(log = false)
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{
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this.status = PsychoJS.Status.STARTED;
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// As found on https://goo.gl/LdLk22
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const playPromise = this._movie.play();
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if (playPromise !== undefined)
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{
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playPromise.catch((error) =>
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{
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throw {
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origin: "MovieStim.play",
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context: `when attempting to play MovieStim: ${this._name}`,
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error,
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};
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});
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}
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}
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/**
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* Pause the movie.
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*
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* @param {boolean} [log= false] - whether of not to log
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*/
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pause(log = false)
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{
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this.status = PsychoJS.Status.STOPPED;
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this._movie.pause();
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}
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/**
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* Stop the movie and reset to 0s.
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*
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* @param {boolean} [log= false] - whether of not to log
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*/
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stop(log = false)
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{
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this.status = PsychoJS.Status.STOPPED;
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this._movie.pause();
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this.seek(0, log);
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}
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/**
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* Jump to a specific timepoint
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*
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* <p>Note: seek is experimental and does not work on all browsers at the moment.</p>
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*
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* @param {number} timePoint - the timepoint to which to jump (in second)
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* @param {boolean} [log= false] - whether of not to log
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*/
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seek(timePoint, log = false)
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{
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if (timePoint < 0 || timePoint > this._movie.duration)
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{
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throw {
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origin: "MovieStim.seek",
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context: `when seeking to timepoint: ${timePoint} of MovieStim: ${this._name}`,
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error: `the timepoint does not belong to [0, ${this._movie.duration}`,
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};
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}
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if (this._hasFastSeek)
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{
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this._movie.fastSeek(timePoint);
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}
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else
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{
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try
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{
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this._movie.currentTime = timePoint;
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}
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catch (error)
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{
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throw {
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origin: "MovieStim.seek",
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context: `when seeking to timepoint: ${timePoint} of MovieStim: ${this._name}`,
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error,
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};
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}
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}
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}
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/**
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* Estimate the bounding box.
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*
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* @name module:visual.ImageStim#_estimateBoundingBox
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* @function
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* @override
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* @protected
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*/
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_estimateBoundingBox()
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{
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const size = this._getDisplaySize();
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if (typeof size !== "undefined")
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{
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this._boundingBox = new PIXI.Rectangle(
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this._pos[0] - size[0] / 2,
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this._pos[1] - size[1] / 2,
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size[0],
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size[1],
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);
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}
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// TODO take the orientation into account
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}
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/**
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* Update the stimulus, if necessary.
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*
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* @name module:visual.MovieStim#_updateIfNeeded
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* @private
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*/
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_updateIfNeeded()
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{
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if (!this._needUpdate)
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{
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return;
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}
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this._needUpdate = false;
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// update the PIXI representation, if need be:
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if (this._needPixiUpdate)
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{
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this._needPixiUpdate = false;
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if (typeof this._pixi !== "undefined")
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{
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// Leave original video in place
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// https://pixijs.download/dev/docs/PIXI.Sprite.html#destroy
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this._pixi.destroy({
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children: true,
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texture: true,
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baseTexture: false,
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});
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}
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this._pixi = undefined;
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// no movie to draw: return immediately
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if (typeof this._movie === "undefined")
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{
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return;
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}
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// create a PixiJS video sprite:
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this._texture = PIXI.Texture.from(this._movie, { resourceOptions: { autoPlay: this.autoPlay } });
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this._pixi = new PIXI.Sprite(this._texture);
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// since _texture.width may not be immedialy available but the rest of the code needs its value
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// we arrange for repeated calls to _updateIfNeeded until we have a width:
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if (this._texture.width === 0)
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{
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this._needUpdate = true;
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this._needPixiUpdate = true;
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return;
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}
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}
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// audio:
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this._movie.muted = this._noAudio;
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this._movie.volume = this._volume;
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// loop:
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this._movie.loop = this._loop;
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// opacity:
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this._pixi.alpha = this.opacity;
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// set the scale:
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const displaySize = this._getDisplaySize();
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const size_px = util.to_px(displaySize, this.units, this.win);
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const scaleX = size_px[0] / this._texture.width;
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const scaleY = size_px[1] / this._texture.height;
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this._pixi.scale.x = this.flipHoriz ? -scaleX : scaleX;
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this._pixi.scale.y = this.flipVert ? scaleY : -scaleY;
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// set the position, rotation, and anchor (movie centered on pos):
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this._pixi.position = to_pixiPoint(this.pos, this.units, this.win);
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this._pixi.rotation = -this.ori * Math.PI / 180;
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this._pixi.anchor.x = 0.5;
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this._pixi.anchor.y = 0.5;
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// re-estimate the bounding box, as the texture's width may now be available:
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this._estimateBoundingBox();
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}
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/**
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* Get the size of the display image, which is either that of the ImageStim or that of the image
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* it contains.
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*
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* @name module:visual.ImageStim#_getDisplaySize
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* @private
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* @return {number[]} the size of the displayed image
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*/
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_getDisplaySize()
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{
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let displaySize = this.size;
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if (typeof displaySize === "undefined")
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{
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// use the size of the texture, if we have access to it:
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if (typeof this._texture !== "undefined" && this._texture.width > 0)
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{
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const textureSize = [this._texture.width, this._texture.height];
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displaySize = util.to_unit(textureSize, "pix", this.win, this.units);
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}
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}
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return displaySize;
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}
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}
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</code></pre>
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</article>
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<h2><a href="index.html">Home</a></h2><h3>Modules</h3><ul><li><a href="module-core.html">core</a></li><li><a href="module-data.html">data</a></li><li><a href="module-sound.html">sound</a></li><li><a href="module-util.html">util</a></li><li><a href="module-visual.html">visual</a></li></ul><h3>Classes</h3><ul><li><a href="FaceDetector_FaceDetector.html">FaceDetector</a></li><li><a href="module.data.MultiStairHandler.html">MultiStairHandler</a></li><li><a href="module.data.QuestHandler.html">QuestHandler</a></li><li><a href="module-core.BuilderKeyResponse.html">BuilderKeyResponse</a></li><li><a href="module-core.EventManager.html">EventManager</a></li><li><a href="module-core.GUI.html">GUI</a></li><li><a href="module-core.Keyboard.html">Keyboard</a></li><li><a href="module-core.KeyPress.html">KeyPress</a></li><li><a href="module-core.Logger.html">Logger</a></li><li><a href="module-core.MinimalStim.html">MinimalStim</a></li><li><a href="module-core.Mouse.html">Mouse</a></li><li><a href="module-core.PsychoJS.html">PsychoJS</a></li><li><a href="module-core.ServerManager.html">ServerManager</a></li><li><a href="module-core.Window.html">Window</a></li><li><a href="module-data.ExperimentHandler.html">ExperimentHandler</a></li><li><a href="module-data.MultiStairHandler.html">MultiStairHandler</a></li><li><a href="module-data.QuestHandler.html">QuestHandler</a></li><li><a href="module-data.Shelf.html">Shelf</a></li><li><a href="module-data.TrialHandler.html">TrialHandler</a></li><li><a href="module-sound.AudioClip.html">AudioClip</a></li><li><a href="module-sound.AudioClipPlayer.html">AudioClipPlayer</a></li><li><a href="module-sound.Microphone.html">Microphone</a></li><li><a href="module-sound.Sound.html">Sound</a></li><li><a href="module-sound.TonePlayer.html">TonePlayer</a></li><li><a href="module-sound.TrackPlayer.html">TrackPlayer</a></li><li><a href="module-sound.Transcriber.html">Transcriber</a></li><li><a href="module-sound.Transcript.html">Transcript</a></li><li><a href="module-util.Clock.html">Clock</a></li><li><a href="module-util.Color.html">Color</a></li><li><a href="module-util.CountdownTimer.html">CountdownTimer</a></li><li><a href="module-util.EventEmitter.html">EventEmitter</a></li><li><a href="module-util.MixinBuilder.html">MixinBuilder</a></li><li><a href="module-util.MonotonicClock.html">MonotonicClock</a></li><li><a href="module-util.PsychObject.html">PsychObject</a></li><li><a href="module-util.Scheduler.html">Scheduler</a></li><li><a href="module-visual.ButtonStim.html">ButtonStim</a></li><li><a href="module-visual.Camera.html">Camera</a></li><li><a href="module-visual.FaceDetector.html">FaceDetector</a></li><li><a href="module-visual.Form.html">Form</a></li><li><a href="module-visual.GratingStim.html">GratingStim</a></li><li><a href="module-visual.ImageStim.html">ImageStim</a></li><li><a href="module-visual.MovieStim.html">MovieStim</a></li><li><a href="module-visual.Polygon.html">Polygon</a></li><li><a href="module-visual.Rect.html">Rect</a></li><li><a href="module-visual.ShapeStim.html">ShapeStim</a></li><li><a href="module-visual.Slider.html">Slider</a></li><li><a href="module-visual.TextBox.html">TextBox</a></li><li><a href="module-visual.TextStim.html">TextStim</a></li><li><a href="module-visual.VisualStim.html">VisualStim</a></li></ul><h3>Interfaces</h3><ul><li><a href="module-sound.SoundPlayer.html">SoundPlayer</a></li></ul><h3>Mixins</h3><ul><li><a href="module-core.WindowMixin.html">WindowMixin</a></li><li><a href="module-util.ColorMixin.html">ColorMixin</a></li></ul>
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