/**
* Movie Stimulus.
*
* @author Alain Pitiot
* @version 2021.1.0
* @copyright (c) 2017-2020 Ilixa Ltd. (http://ilixa.com) (c) 2020 Open Science Tools Ltd. (https://opensciencetools.org)
* @license Distributed under the terms of the MIT License
*/
import {VisualStim} from './VisualStim';
import {Color} from '../util/Color';
import {ColorMixin} from '../util/ColorMixin';
import * as util from '../util/Util';
import {PsychoJS} from "../core/PsychoJS";
/**
* Movie Stimulus.
*
* @name module:visual.MovieStim
* @class
* @extends VisualStim
* @param {Object} options
* @param {String} options.name - the name used when logging messages from this stimulus
* @param {module:core.Window} options.win - the associated Window
* @param {string | HTMLVideoElement} options.movie - the name of the movie resource or the HTMLVideoElement corresponding to the movie
* @param {string} [options.units= "norm"] - the units of the stimulus (e.g. for size, position, vertices)
* @param {Array.<number>} [options.pos= [0, 0]] - the position of the center of the stimulus
* @param {string} [options.units= 'norm'] - the units of the stimulus vertices, size and position
* @param {number} [options.ori= 0.0] - the orientation (in degrees)
* @param {number} [options.size] - the size of the rendered image (the size of the image will be used if size is not specified)
* @param {Color} [options.color= Color('white')] the background color
* @param {number} [options.opacity= 1.0] - the opacity
* @param {number} [options.contrast= 1.0] - the contrast
* @param {boolean} [options.interpolate= false] - whether or not the image is interpolated
* @param {boolean} [options.flipHoriz= false] - whether or not to flip horizontally
* @param {boolean} [options.flipVert= false] - whether or not to flip vertically
* @param {boolean} [options.loop= false] - whether or not to loop the movie
* @param {number} [options.volume= 1.0] - the volume of the audio track (must be between 0.0 and 1.0)
* @param {boolean} [options.noAudio= false] - whether or not to play the audio
* @param {boolean} [options.autoPlay= true] - whether or not to autoplay the video
* @param {boolean} [options.autoDraw= false] - whether or not the stimulus should be automatically drawn on every frame flip
* @param {boolean} [options.autoLog= false] - whether or not to log
*
* @todo autoPlay does not work for the moment.
*/
export class MovieStim extends VisualStim
{
constructor({name, win, movie, pos, units, ori, size, color, opacity, contrast, interpolate, flipHoriz, flipVert, loop, volume, noAudio, autoPlay, autoDraw, autoLog} = {})
{
super({name, win, units, ori, opacity, pos, size, autoDraw, autoLog});
this.psychoJS.logger.debug('create a new MovieStim with name: ', name);
// movie and movie control:
this._addAttribute(
'movie',
movie
);
this._addAttribute(
'volume',
volume,
1.0,
this._onChange(false, false)
);
this._addAttribute(
'noAudio',
noAudio,
false,
this._onChange(false, false)
);
this._addAttribute(
'autoPlay',
autoPlay,
true,
this._onChange(false, false)
);
this._addAttribute(
'flipHoriz',
flipHoriz,
false,
this._onChange(false, false)
);
this._addAttribute(
'flipVert',
flipVert,
false,
this._onChange(false, false)
);
this._addAttribute(
'interpolate',
interpolate,
false,
this._onChange(true, false)
);
// colors:
this._addAttribute(
'color',
color,
'white',
this._onChange(true, false)
);
this._addAttribute(
'contrast',
contrast,
1.0,
this._onChange(true, false)
);
this._addAttribute(
'opacity',
opacity,
1.0,
this._onChange(false, false)
);
this._addAttribute(
'loop',
loop,
false,
this._onChange(false, false)
);
// estimate the bounding box:
this._estimateBoundingBox();
// check whether the fastSeek method on HTMLVideoElement is implemented:
const videoElement = document.createElement('video');
this._hasFastSeek = (typeof videoElement.fastSeek === 'function');
if (this._autoLog)
{
this._psychoJS.experimentLogger.exp(`Created ${this.name} = ${this.toString()}`);
}
}
/**
* Setter for the movie attribute.
*
* @name module:visual.MovieStim#setMovie
* @public
* @param {string | HTMLVideoElement} movie - the name of the movie resource or the HTMLVideoElement corresponding to the movie
* @param {boolean} [log= false] - whether of not to log
*/
setMovie(movie, log = false)
{
const response = {
origin: 'MovieStim.setMovie',
context: 'when setting the movie of MovieStim: ' + this._name
};
try
{
// movie is undefined: that's fine but we raise a warning in case this is a symptom of an actual problem
if (typeof movie === 'undefined')
{
this.psychoJS.logger.warn('setting the movie of MovieStim: ' + this._name + ' with argument: undefined.');
this.psychoJS.logger.debug('set the movie of MovieStim: ' + this._name + ' as: undefined');
}
else
{
// movie is a string: it should be the name of a resource, which we load
if (typeof movie === 'string')
{
movie = this.psychoJS.serverManager.getResource(movie);
}
// movie should now be an actual HTMLVideoElement: we raise an error if it is not
if (!(movie instanceof HTMLVideoElement))
{
throw 'the argument: ' + movie.toString() + ' is not a video" }';
}
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`);
}
// Make sure just one listener attached across instances
// https://stackoverflow.com/questions/11455515
if (!movie.onended)
{
movie.onended = () =>
{
this.status = PsychoJS.Status.FINISHED;
};
}
this._setAttribute('movie', movie, log);
this._needUpdate = true;
this._needPixiUpdate = true;
}
catch (error)
{
throw Object.assign(response, {error});
}
}
/**
* Reset the stimulus.
*
* @param {boolean} [log= false] - whether of not to log
*/
reset(log = false)
{
this.status = PsychoJS.Status.NOT_STARTED;
this._movie.pause();
this.seek(0, log);
}
/**
* Start playing the movie.
*
* @param {boolean} [log= false] - whether of not to log
*/
play(log = false)
{
this.status = PsychoJS.Status.STARTED;
// As found on https://goo.gl/LdLk22
const playPromise = this._movie.play();
if (playPromise !== undefined)
{
playPromise.catch((error) => {
throw {
origin: 'MovieStim.play',
context: `when attempting to play MovieStim: ${this._name}`,
error
};
});
}
}
/**
* Pause the movie.
*
* @param {boolean} [log= false] - whether of not to log
*/
pause(log = false)
{
this.status = PsychoJS.Status.STOPPED;
this._movie.pause();
}
/**
* Stop the movie and reset to 0s.
*
* @param {boolean} [log= false] - whether of not to log
*/
stop(log = false)
{
this.status = PsychoJS.Status.STOPPED;
this._movie.pause();
this.seek(0, log);
}
/**
* Jump to a specific timepoint
*
* <p>Note: seek is experimental and does not work on all browsers at the moment.</p>
*
* @param {number} timePoint - the timepoint to which to jump (in second)
* @param {boolean} [log= false] - whether of not to log
*/
seek(timePoint, log = false)
{
if (timePoint < 0 || timePoint > this._movie.duration)
{
throw {
origin: 'MovieStim.seek',
context: `when seeking to timepoint: ${timePoint} of MovieStim: ${this._name}`,
error: `the timepoint does not belong to [0, ${this._movie.duration}`
};
}
if (this._hasFastSeek)
{
this._movie.fastSeek(timePoint);
}
else
{
try
{
this._movie.currentTime = timePoint;
}
catch (error)
{
throw {
origin: 'MovieStim.seek',
context: `when seeking to timepoint: ${timePoint} of MovieStim: ${this._name}`,
error
};
}
}
}
/**
* Estimate the bounding box.
*
* @name module:visual.ImageStim#_estimateBoundingBox
* @function
* @override
* @protected
*/
_estimateBoundingBox()
{
const size = this._getDisplaySize();
if (typeof size !== 'undefined')
{
this._boundingBox = new PIXI.Rectangle(
this._pos[0] - size[0] / 2,
this._pos[1] - size[1] / 2,
size[0],
size[1]
);
}
// TODO take the orientation into account
}
/**
* Update the stimulus, if necessary.
*
* @name module:visual.MovieStim#_updateIfNeeded
* @private
*/
_updateIfNeeded()
{
if (!this._needUpdate)
{
return;
}
this._needUpdate = false;
// update the PIXI representation, if need be:
if (this._needPixiUpdate)
{
this._needPixiUpdate = false;
if (typeof this._pixi !== 'undefined')
{
// Leave original video in place
// https://pixijs.download/dev/docs/PIXI.Sprite.html#destroy
this._pixi.destroy({
children: true,
texture: true,
baseTexture: false
});
}
this._pixi = undefined;
// no movie to draw: return immediately
if (typeof this._movie === 'undefined')
{
return;
}
// create a PixiJS video sprite:
this._texture = PIXI.Texture.from(this._movie, { resourceOptions: { autoPlay: this.autoPlay } });
this._pixi = new PIXI.Sprite(this._texture);
// since _texture.width may not be immedialy available but the rest of the code needs its value
// we arrange for repeated calls to _updateIfNeeded until we have a width:
if (this._texture.width === 0)
{
this._needUpdate = true;
this._needPixiUpdate = true;
return;
}
}
// audio:
this._movie.muted = this._noAudio;
this._movie.volume = this._volume;
// loop:
this._movie.loop = this._loop;
// opacity:
this._pixi.alpha = this.opacity;
// set the scale:
const displaySize = this._getDisplaySize();
const size_px = util.to_px(displaySize, this.units, this.win);
const scaleX = size_px[0] / this._texture.width;
const scaleY = size_px[1] / this._texture.height;
this._pixi.scale.x = this.flipHoriz ? -scaleX : scaleX;
this._pixi.scale.y = this.flipVert ? scaleY : -scaleY;
// set the position, rotation, and anchor (movie centered on pos):
this._pixi.position = util.to_pixiPoint(this.pos, this.units, this.win);
this._pixi.rotation = this.ori * Math.PI / 180;
this._pixi.anchor.x = 0.5;
this._pixi.anchor.y = 0.5;
// re-estimate the bounding box, as the texture's width may now be available:
this._estimateBoundingBox();
}
/**
* Get the size of the display image, which is either that of the ImageStim or that of the image
* it contains.
*
* @name module:visual.ImageStim#_getDisplaySize
* @private
* @return {number[]} the size of the displayed image
*/
_getDisplaySize()
{
let displaySize = this.size;
if (typeof displaySize === 'undefined')
{
// use the size of the texture, if we have access to it:
if (typeof this._texture !== 'undefined' && this._texture.width > 0)
{
const textureSize = [this._texture.width, this._texture.height];
displaySize = util.to_unit(textureSize, 'pix', this.win, this.units);
}
}
return displaySize;
}
}