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Merge pull request #2 from hesmall/master
Add html-audio-response and audio-audio-response plugins.
This commit is contained in:
Becky Gilbert
GitHub
commit
3277f8f433
472
plugins/jspsych-audio-audio-response.js
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472
plugins/jspsych-audio-audio-response.js
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/**
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* jspsych-audio-audio-response
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* Matt Jaquiery, Feb 2018 (https://github.com/mjaquiery)
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* Becky Gilbert, Apr 2020 (https://github.com/becky-gilbert)
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* Hannah Small, 2020/07/07 (https://github.com/hesmall)
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* added in browser checking and mic checking using this code: https://experiments.ppls.ed.ac.uk/ -- Hannah Small, 2020/07/07
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* added option to manually end recording on each trial
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*
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* plugin for displaying an audio stimulus and getting an audio response (records audio only after the audio stimulus ends)
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*
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* documentation: docs.jspsych.org
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*
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**/
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jsPsych.plugins["audio-audio-response"] = (function() {
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var plugin = {};
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plugin.info = {
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name: 'audio-audio-response',
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description: 'Present a string and retrieve an audio response.',
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parameters: {
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audio_stimulus: {
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type: jsPsych.plugins.parameterType.AUDIO,
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pretty_name: 'Stimulus',
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default: undefined,
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description: 'The audio file to be played'
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},
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visual_stimulus: {
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type: jsPsych.plugins.parameterType.HTML_STRING,
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pretty_name: 'Stimulus',
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default: undefined,
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description: 'Any visual stimulus to be displayed'
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},
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audio_stimulus: {
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type: jsPsych.plugins.parameterType.AUDIO,
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pretty_name: 'Stimulus',
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default: undefined,
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description: 'The audio file to be played'
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},
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buffer_length: {
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type: jsPsych.plugins.parameterType.INT,
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pretty_name: 'Buffer length',
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default: 4000,
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description: 'Length of the audio buffer.'
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},
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postprocessing: {
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type: jsPsych.plugins.parameterType.FUNCTION,
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pretty_name: 'Postprocessing function',
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default: function(data) {
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return new Promise(function(resolve) {
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const blob = new Blob(data, { type: 'audio/webm' });
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// create URL, which is used to replay the audio file (if allow_playback is true)
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let url = URL.createObjectURL(blob);
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var reader = new window.FileReader();
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reader.readAsDataURL(blob);
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const readerPromise = new Promise(function(resolveReader) {
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reader.onloadend = function() {
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// Create base64 string, which is used to save the audio data in JSON/CSV format.
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// This has to go inside of a Promise so that the base64 data is converted before the
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// higher-level data processing Promise is resolved (since that will pass the base64
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// data to the onRecordingFinish function).
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var base64 = reader.result;
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base64 = base64.split(',')[1];
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resolveReader(base64);
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};
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});
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readerPromise.then(function(base64) {
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// After the base64 string has been created we can resolve the higher-level Promise,
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// which pass both the base64 data and the URL to the onRecordingFinish function.
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var processed_data = {url: url, str: base64};
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resolve(processed_data);
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});
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});
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},
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description: 'Function to execute on the audio data prior to saving. '+
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'This function takes the audio data as an argument, '+
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'and returns an object with keys called "str" and "url". '+
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'The str and url values are saved in the trial data as "audio_data" and "audio_url". '+
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'The url value is used as the audio source to replay the recording if allow_playback is true. '+
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'By default, the str value is a base64 string which can be saved in the JSON/CSV data and '+
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'later converted back into an audio file. '+
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'This parameter can be used to pass a custom function that saves the file using a different '+
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'method/format and generates an ID that relates this file to the trial data. '+
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'The custom postprocessing function must return an object with "str" and "url" keys. '+
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'The url value must be a valid audio source, which is used if allow_playback is true. '+
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'The str value can be null.'
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},
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allow_playback: {
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type: jsPsych.plugins.parameterType.BOOL,
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pretty_name: 'Allow playback',
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default: true,
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description: 'Whether to allow the participant to play back their '+
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'recording and re-record if unhappy.'
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},
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recording_light: {
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type: jsPsych.plugins.parameterType.HTML_STRING,
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pretty_name: 'Recording light',
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default: '<div id="jspsych-audio-audio-response-light" '+
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'style="border: 2px solid darkred; background-color: darkred; '+
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'width: 50px; height: 50px; border-radius: 50px; margin: 20px auto; '+
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'display: block;"></div>',
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description: 'HTML to display while recording is in progress.'
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},
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recording_light_off: {
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type: jsPsych.plugins.parameterType.HTML_STRING,
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pretty_name: 'Recording light (off state)',
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default: '<div id="jspsych-audio-audio-response-light" '+
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'style="border: 2px solid darkred; background-color: inherit; '+
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'width: 50px; height: 50px; border-radius: 50px; margin: 20px auto; '+
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'display: block;"></div>',
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description: 'HTML to display while recording is not in progress.'
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},
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prompt: {
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type: jsPsych.plugins.parameterType.STRING,
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pretty_name: 'Prompt',
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default: null,
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description: 'Any content here will be displayed under the button.'
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},
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stimulus_duration: {
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type: jsPsych.plugins.parameterType.INT,
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pretty_name: 'Stimulus duration',
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default: null,
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description: 'How long to show the stimulus.'
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},
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margin_vertical: {
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type: jsPsych.plugins.parameterType.STRING,
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pretty_name: 'Margin vertical',
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default: '0px',
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description: 'The vertical margin of the button.'
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},
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margin_horizontal: {
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type: jsPsych.plugins.parameterType.STRING,
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pretty_name: 'Margin horizontal',
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default: '8px',
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description: 'The horizontal margin of the button.'
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},
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response_ends_trial: {
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type: jsPsych.plugins.parameterType.BOOL,
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pretty_name: 'Response ends trial',
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default: false,
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description: 'If true, then trial will end when user responds.'
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},
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wait_for_mic_approval: {
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type: jsPsych.plugins.parameterType.BOOL,
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pretty_name: 'Wait for mic approval',
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default: false,
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description: 'If true, the trial will not start until the participant approves the browser mic request.'
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},
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enable_mic_message: {
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type: jsPsych.plugins.parameterType.BOOL,
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pretty_name: 'Will allow pop-up for participant to enable microphone',
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default: false,
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description: 'If true, will allow the browser mic request. This should be done before recording any audio!'
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},
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manually_end_recording: {
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type: jsPsych.plugins.parameterType.BOOL,
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pretty_name: 'Subject will manually end their recording',
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default: false,
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description: 'If true, the subject will have to press a key to stop recording and continue.'
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},
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manually_end_recording_key: {
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type: jsPsych.plugins.parameterType.KEYCODE,
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pretty_name: 'Key to manually end recording',
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default: jsPsych.ALL_KEYS,
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description: 'The key to end recording on any given trial, default is any key.'
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}
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}
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};
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plugin.trial = function(display_element, trial) {
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if(typeof trial.audio_stimulus === 'undefined'){
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console.error('Required parameter "audio_stimulus" missing in audio-audio-response');
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}
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let playbackElements = [];
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// store response
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let response = {
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rt: null,
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audio_data: null,
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key: null
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};
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let recorder = null;
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let start_time = null;
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//setup stimulus
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var context = jsPsych.pluginAPI.audioContext();
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if(context !== null){
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var source = context.createBufferSource();
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source.buffer = jsPsych.pluginAPI.getAudioBuffer(trial.audio_stimulus);
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source.connect(context.destination);
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} else {
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var audio = jsPsych.pluginAPI.getAudioBuffer(trial.audio_stimulus);
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audio.currentTime = 0;
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}
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let html = '<div id="jspsych-audio-audio-response-stimulus">'+trial.visual_stimulus+'</div>';
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// add prompt if there is one
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if (trial.prompt !== null) {
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html += trial.prompt;
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}
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trial.recording_light = '<div id="jspsych-audio-audio-response-light" '+ trial.recording_light + '</div>'
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trial.recording_light_off = '<div id="jspsych-audio-audio-response-light" '+ trial.recording_light_off + '</div>'
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// add recording off light
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html += '<div id="jspsych-audio-audio-response-recording-container">'+trial.recording_light_off+'</div>';
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// add audio element container with hidden audio element
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html += '<div id="jspsych-audio-audio-response-audio-container"><audio id="jspsych-audio-audio-response-audio" controls style="visibility:hidden;"></audio></div>';
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// add button element with hidden buttons
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html += '<div id="jspsych-audio-audio-response-buttons"><button id="jspsych-audio-audio-response-rerecord" class="jspsych-audio-response-button jspsych-btn" style="display: inline-block; margin:'+trial.margin_vertical+' '+trial.margin_horizontal+'; visibility:hidden;">Retry</button><button id="jspsych-audio-audio-response-okay" class="jspsych-audio-response-button jspsych-btn" style="display: inline-block; margin:'+trial.margin_vertical+' '+trial.margin_horizontal+'; visibility:hidden;">Okay</button></div>';
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function start_trial() {
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display_element.innerHTML = html;
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document.querySelector('#jspsych-audio-audio-response-okay').addEventListener('click', end_trial);
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document.querySelector('#jspsych-audio-audio-response-rerecord').addEventListener('click', start_recording);
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// Add visual indicators to let people know we're recording
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document.querySelector('#jspsych-audio-audio-response-recording-container').innerHTML = trial.recording_light;
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// trial start time
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start_time = performance.now();
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// set timer to hide-html if stimulus duration is set
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if (trial.stimulus_duration !== null) {
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jsPsych.pluginAPI.setTimeout(function() {
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display_element.querySelector('#jspsych-audio-audio-response-stimulus').style.visibility = 'hidden';
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}, trial.stimulus_duration);
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}
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// start audio
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if(context !== null){
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startTime = context.currentTime;
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source.start(startTime);
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} else {
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audio.play();
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}
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//only allow recording after the audio has finished!
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audio.onended = function() {
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start_time = performance.now(); //reset start time to measure rt from end of audio file
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if (trial.wait_for_mic_approval===false) {
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start_recording();
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}
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}
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}
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// audio element processing
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function start_recording() {
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// hide existing playback elements
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playbackElements.forEach(function (id) {
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let element = document.getElementById(id);
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element.style.visibility = 'hidden';
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});
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navigator.mediaDevices.getUserMedia({ audio: true, video: false }).then(process_audio);
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if (!trial.wait_for_mic_approval) {
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// Add visual indicators to let people know we're recording
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document.querySelector('#jspsych-audio-audio-response-recording-container').innerHTML = trial.recording_light;
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}
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}
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// function to handle responses by the subject
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function process_audio(stream) {
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if (trial.wait_for_mic_approval) {
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if (start_time === null) {
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start_trial();
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} else {
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document.querySelector('#jspsych-audio-audio-response-recording-container').innerHTML = trial.recording_light;
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}
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}
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// This code largely thanks to skyllo at
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// http://air.ghost.io/recording-to-an-audio-file-using-html5-and-js/
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// store streaming data chunks in array
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const chunks = [];
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// create media recorder instance to initialize recording
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// Note: the MediaRecorder function is not supported in Safari or Edge
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//ADD check for browser! FROM https://experiments.ppls.ed.ac.uk/, THANKS TO ANNIE HOLTZ AND KENNY SMITH
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var wrong_browser_message = "Sorry, it's not possible to run the experiment on your web browser. Please try using Chrome or Firefox instead.";
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var declined_audio_message = "You must allow audio recording to take part in the experiment. Please reload the page and allow access to your microphone to proceed.";
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// function that throws error and displays message if experiment is run in browsers that do not support MediaRecorder, or if microphone access is denied
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function errorQuit(message) {
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var body = document.getElementsByTagName('body')[0];
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body.innerHTML = '<p style="color: #FF0000">'+message+'</p>'+body.innerHTML;//defines the style of error messages
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throw error;
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};
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//either starts handlerFunction if access to microphone is enabeled or catches that it is blocked and calls errorQuit function
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if(trial.enable_mic_message){
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navigator.mediaDevices.getUserMedia({audio:true})
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.then(stream => {handlerFunction(stream)})
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.catch(error => {errorQuit(declined_audio_message)});
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}else{
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recorder = new MediaRecorder(stream)
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stream = recorder.stream
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handlerFunction(stream)
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}
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//function that catches incompatibility with MediaRecorder (e.g. in Safari or Edge)
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function handlerFunction(stream) {
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try {
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recorder = new MediaRecorder(stream);
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recorder.data = [];
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recorder.wrapUp = false;
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recorder.ondataavailable = function(e) {
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// add stream data to chunks
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chunks.push(e.data);
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if (recorder.wrapUp) {
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if (typeof trial.postprocessing !== 'undefined') {
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trial.postprocessing(chunks)
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.then(function(processedData) {
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onRecordingFinish(processedData);
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});
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} else {
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// should never fire - trial.postprocessing should use the default function if
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// not passed in via trial parameters
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onRecordingFinish(chunks);
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}
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}
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};
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// start recording with 1 second time between receiving 'ondataavailable' events
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recorder.start(1000);
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if(trial.manually_end_recording == false){
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// setTimeout to stop recording after 4 seconds
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setTimeout(function() {
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// this will trigger one final 'ondataavailable' event and set recorder state to 'inactive'
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recorder.stop();
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recorder.wrapUp = true;
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}, trial.buffer_length);
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}else{
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//wait for response from keyboard to end recording
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var keyboardListener = jsPsych.pluginAPI.getKeyboardResponse({
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callback_function: after_response,
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valid_responses: trial.manually_end_recording_key,
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rt_method: 'performance',
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persist: false,
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allow_held_key: false
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});
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}
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} catch(error) {
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errorQuit(wrong_browser_message);
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};
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}
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// navigator.mediaDevices.getUserMedia({audio:true});
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//recorder = new MediaRecorder(stream);
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//recorder.data = [];
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//recorder.wrapUp = false;
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}
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var after_response = function(info){
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// after a valid response, the stimulus will have the CSS class 'responded'
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// which can be used to provide visual feedback that a response was recorded
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//display_element.querySelector('#jspsych-audio-audio-response-stimulus').className += ' responded';
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// only record the first response
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if (response.key == null) {
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response = info;
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}
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// this will trigger one final 'ondataavailable' event and set recorder state to 'inactive'
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recorder.stop();
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recorder.wrapUp = true;
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}
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function showPlaybackTools(data) {
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// Audio Player
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let playerDiv = display_element.querySelector('#jspsych-audio-audio-response-audio-container');
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let url;
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if (data instanceof Blob) {
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const blob = new Blob(data, { type: 'audio/webm' });
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url = (URL.createObjectURL(blob));
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} else {
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url = data;
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||||
}
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let player = playerDiv.querySelector('#jspsych-audio-audio-response-audio');
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player.src = url;
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player.style.visibility = "visible";
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// Okay/rerecord buttons
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let buttonDiv = document.querySelector('#jspsych-audio-audio-response-buttons');
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let rerecord = buttonDiv.querySelector('#jspsych-audio-audio-response-rerecord');
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let okay = buttonDiv.querySelector('#jspsych-audio-audio-response-okay');
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rerecord.style.visibility = 'visible';
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okay.style.visibility = 'visible';
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// Save ids of things we want to hide later:
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playbackElements = [player.id, okay.id, rerecord.id];
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}
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function onRecordingFinish(data) {
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// switch to the off visual indicator
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let light = document.querySelector('#jspsych-audio-audio-response-recording-container');
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if (light !== null)
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||||
light.innerHTML = trial.recording_light_off;
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// measure rt
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let end_time = performance.now();
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let rt = end_time - start_time;
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response.audio_data = data.str;
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response.audio_url = data.url;
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response.rt = rt;
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if (trial.response_ends_trial) {
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||||
end_trial();
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} else if (trial.allow_playback) { // only allow playback if response doesn't end trial
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showPlaybackTools(response.audio_url);
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} else {
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// fallback in case response_ends_trial and allow_playback are both false,
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// which would mean the trial never ends
|
||||
end_trial();
|
||||
}
|
||||
}
|
||||
|
||||
// function to end trial when it is time
|
||||
function end_trial() {
|
||||
// kill any remaining setTimeout handlers
|
||||
jsPsych.pluginAPI.clearAllTimeouts();
|
||||
//kill keyboard listeners
|
||||
jsPsych.pluginAPI.cancelAllKeyboardResponses();
|
||||
|
||||
//stop and clear audio
|
||||
if(context !== null){
|
||||
source.stop();
|
||||
source.onended = function() { }
|
||||
} else {
|
||||
audio.pause();
|
||||
audio.removeEventListener('ended', end_trial);
|
||||
}
|
||||
|
||||
// gather the data to store for the trial
|
||||
let trial_data = {
|
||||
"rt": response.rt,
|
||||
"stimulus": trial.stimulus,
|
||||
"audio_data": response.audio_data,
|
||||
"key_press": response.key
|
||||
};
|
||||
|
||||
// clear the display
|
||||
display_element.innerHTML = '';
|
||||
|
||||
// move on to the next trial
|
||||
jsPsych.finishTrial(trial_data);
|
||||
}
|
||||
|
||||
if (trial.wait_for_mic_approval) {
|
||||
start_recording();
|
||||
} else {
|
||||
start_trial();
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
return plugin;
|
||||
})();
|
||||
416
plugins/jspsych-html-audio-response.js
Normal file
416
plugins/jspsych-html-audio-response.js
Normal file
@ -0,0 +1,416 @@
|
||||
/**
|
||||
* jspsych-html-audio-response
|
||||
* Matt Jaquiery, Feb 2018 (https://github.com/mjaquiery)
|
||||
* Becky Gilbert, Apr 2020 (https://github.com/becky-gilbert)
|
||||
* Hannah Small, 2020/07/07 (https://github.com/hesmall)
|
||||
* added in browser checking and mic checking using this code: https://experiments.ppls.ed.ac.uk/ -- Hannah Small, 2020/07/07
|
||||
* added option to manually end recording on each trial
|
||||
*
|
||||
* plugin for displaying an html stimulus and getting an audio response
|
||||
*
|
||||
* documentation: docs.jspsych.org
|
||||
*
|
||||
**/
|
||||
|
||||
jsPsych.plugins["html-audio-response"] = (function() {
|
||||
|
||||
var plugin = {};
|
||||
|
||||
plugin.info = {
|
||||
name: 'html-audio-response',
|
||||
description: 'Present a string and retrieve an audio response.',
|
||||
parameters: {
|
||||
stimulus: {
|
||||
type: jsPsych.plugins.parameterType.HTML_STRING,
|
||||
pretty_name: 'Stimulus',
|
||||
default: undefined,
|
||||
description: 'The string to be displayed'
|
||||
},
|
||||
buffer_length: {
|
||||
type: jsPsych.plugins.parameterType.INT,
|
||||
pretty_name: 'Buffer length',
|
||||
default: 4000,
|
||||
description: 'Length of the audio buffer.'
|
||||
},
|
||||
postprocessing: {
|
||||
type: jsPsych.plugins.parameterType.FUNCTION,
|
||||
pretty_name: 'Postprocessing function',
|
||||
default: function(data) {
|
||||
return new Promise(function(resolve) {
|
||||
const blob = new Blob(data, { type: 'audio/webm' });
|
||||
// create URL, which is used to replay the audio file (if allow_playback is true)
|
||||
let url = URL.createObjectURL(blob);
|
||||
var reader = new window.FileReader();
|
||||
reader.readAsDataURL(blob);
|
||||
const readerPromise = new Promise(function(resolveReader) {
|
||||
reader.onloadend = function() {
|
||||
// Create base64 string, which is used to save the audio data in JSON/CSV format.
|
||||
// This has to go inside of a Promise so that the base64 data is converted before the
|
||||
// higher-level data processing Promise is resolved (since that will pass the base64
|
||||
// data to the onRecordingFinish function).
|
||||
var base64 = reader.result;
|
||||
base64 = base64.split(',')[1];
|
||||
resolveReader(base64);
|
||||
};
|
||||
});
|
||||
readerPromise.then(function(base64) {
|
||||
// After the base64 string has been created we can resolve the higher-level Promise,
|
||||
// which pass both the base64 data and the URL to the onRecordingFinish function.
|
||||
var processed_data = {url: url, str: base64};
|
||||
resolve(processed_data);
|
||||
});
|
||||
});
|
||||
},
|
||||
description: 'Function to execute on the audio data prior to saving. '+
|
||||
'This function takes the audio data as an argument, '+
|
||||
'and returns an object with keys called "str" and "url". '+
|
||||
'The str and url values are saved in the trial data as "audio_data" and "audio_url". '+
|
||||
'The url value is used as the audio source to replay the recording if allow_playback is true. '+
|
||||
'By default, the str value is a base64 string which can be saved in the JSON/CSV data and '+
|
||||
'later converted back into an audio file. '+
|
||||
'This parameter can be used to pass a custom function that saves the file using a different '+
|
||||
'method/format and generates an ID that relates this file to the trial data. '+
|
||||
'The custom postprocessing function must return an object with "str" and "url" keys. '+
|
||||
'The url value must be a valid audio source, which is used if allow_playback is true. '+
|
||||
'The str value can be null.'
|
||||
},
|
||||
allow_playback: {
|
||||
type: jsPsych.plugins.parameterType.BOOL,
|
||||
pretty_name: 'Allow playback',
|
||||
default: true,
|
||||
description: 'Whether to allow the participant to play back their '+
|
||||
'recording and re-record if unhappy.'
|
||||
},
|
||||
recording_light: {
|
||||
type: jsPsych.plugins.parameterType.HTML_STRING,
|
||||
pretty_name: 'Recording light',
|
||||
default: '<div id="jspsych-html-audio-response-light" '+
|
||||
'style="border: 2px solid darkred; background-color: darkred; '+
|
||||
'width: 50px; height: 50px; border-radius: 50px; margin: 20px auto; '+
|
||||
'display: block;"></div>',
|
||||
description: 'HTML to display while recording is in progress.'
|
||||
},
|
||||
recording_light_off: {
|
||||
type: jsPsych.plugins.parameterType.HTML_STRING,
|
||||
pretty_name: 'Recording light (off state)',
|
||||
default: '<div id="jspsych-html-audio-response-light" '+
|
||||
'style="border: 2px solid darkred; background-color: inherit; '+
|
||||
'width: 50px; height: 50px; border-radius: 50px; margin: 20px auto; '+
|
||||
'display: block;"></div>',
|
||||
description: 'HTML to display while recording is not in progress.'
|
||||
},
|
||||
prompt: {
|
||||
type: jsPsych.plugins.parameterType.STRING,
|
||||
pretty_name: 'Prompt',
|
||||
default: null,
|
||||
description: 'Any content here will be displayed under the button.'
|
||||
},
|
||||
stimulus_duration: {
|
||||
type: jsPsych.plugins.parameterType.INT,
|
||||
pretty_name: 'Stimulus duration',
|
||||
default: null,
|
||||
description: 'How long to show the stimulus.'
|
||||
},
|
||||
margin_vertical: {
|
||||
type: jsPsych.plugins.parameterType.STRING,
|
||||
pretty_name: 'Margin vertical',
|
||||
default: '0px',
|
||||
description: 'The vertical margin of the button.'
|
||||
},
|
||||
margin_horizontal: {
|
||||
type: jsPsych.plugins.parameterType.STRING,
|
||||
pretty_name: 'Margin horizontal',
|
||||
default: '8px',
|
||||
description: 'The horizontal margin of the button.'
|
||||
},
|
||||
response_ends_trial: {
|
||||
type: jsPsych.plugins.parameterType.BOOL,
|
||||
pretty_name: 'Response ends trial',
|
||||
default: false,
|
||||
description: 'If true, then trial will end when user responds.'
|
||||
},
|
||||
wait_for_mic_approval: {
|
||||
type: jsPsych.plugins.parameterType.BOOL,
|
||||
pretty_name: 'Wait for mic approval',
|
||||
default: false,
|
||||
description: 'If true, the trial will not start until the participant approves the browser mic request.'
|
||||
},
|
||||
enable_mic_message: {
|
||||
type: jsPsych.plugins.parameterType.BOOL,
|
||||
pretty_name: 'Will allow pop-up for participant to enable microphone',
|
||||
default: false,
|
||||
description: 'If true, will allow the browser mic request. This should be done before recording any audio!'
|
||||
},
|
||||
manually_end_recording: {
|
||||
type: jsPsych.plugins.parameterType.BOOL,
|
||||
pretty_name: 'Subject will manually end their recording',
|
||||
default: false,
|
||||
description: 'If true, the subject will have to press a key to stop recording and continue.'
|
||||
},
|
||||
manually_end_recording_key: {
|
||||
type: jsPsych.plugins.parameterType.KEYCODE,
|
||||
pretty_name: 'Key to manually end recording',
|
||||
default: jsPsych.ALL_KEYS,
|
||||
description: 'The key to end recording on any given trial, default is any key.'
|
||||
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
plugin.trial = function(display_element, trial) {
|
||||
|
||||
if(typeof trial.stimulus === 'undefined'){
|
||||
console.error('Required parameter "stimulus" missing in html-audio-response');
|
||||
}
|
||||
|
||||
let playbackElements = [];
|
||||
// store response
|
||||
let response = {
|
||||
rt: null,
|
||||
audio_data: null
|
||||
};
|
||||
let recorder = null;
|
||||
let start_time = null;
|
||||
|
||||
// add stimulus
|
||||
let html = '<div id="jspsych-html-audio-response-stimulus">'+trial.stimulus+'</div>';
|
||||
|
||||
// add prompt if there is one
|
||||
if (trial.prompt !== null) {
|
||||
html += trial.prompt;
|
||||
}
|
||||
|
||||
// add recording off light
|
||||
html += '<div id="jspsych-html-audio-response-recording-container">'+trial.recording_light_off+'</div>';
|
||||
|
||||
// add audio element container with hidden audio element
|
||||
html += '<div id="jspsych-html-audio-response-audio-container"><audio id="jspsych-html-audio-response-audio" controls style="visibility:hidden;"></audio></div>';
|
||||
|
||||
// add button element with hidden buttons
|
||||
html += '<div id="jspsych-html-audio-response-buttons"><button id="jspsych-html-audio-response-rerecord" class="jspsych-audio-response-button jspsych-btn" style="display: inline-block; margin:'+trial.margin_vertical+' '+trial.margin_horizontal+'; visibility:hidden;">Retry</button><button id="jspsych-html-audio-response-okay" class="jspsych-audio-response-button jspsych-btn" style="display: inline-block; margin:'+trial.margin_vertical+' '+trial.margin_horizontal+'; visibility:hidden;">Sounds good!</button></div>';
|
||||
|
||||
function start_trial() {
|
||||
display_element.innerHTML = html;
|
||||
document.querySelector('#jspsych-html-audio-response-okay').addEventListener('click', end_trial);
|
||||
document.querySelector('#jspsych-html-audio-response-rerecord').addEventListener('click', start_recording);
|
||||
// Add visual indicators to let people know we're recording
|
||||
document.querySelector('#jspsych-html-audio-response-recording-container').innerHTML = trial.recording_light;
|
||||
// trial start time
|
||||
start_time = performance.now();
|
||||
// set timer to hide-html if stimulus duration is set
|
||||
if (trial.stimulus_duration !== null) {
|
||||
jsPsych.pluginAPI.setTimeout(function() {
|
||||
display_element.querySelector('#jspsych-html-audio-response-stimulus').style.visibility = 'hidden';
|
||||
}, trial.stimulus_duration);
|
||||
}
|
||||
if (!trial.wait_for_mic_approval) {
|
||||
start_recording();
|
||||
}
|
||||
}
|
||||
|
||||
// audio element processing
|
||||
function start_recording() {
|
||||
// hide existing playback elements
|
||||
playbackElements.forEach(function (id) {
|
||||
let element = document.getElementById(id);
|
||||
element.style.visibility = 'hidden';
|
||||
});
|
||||
navigator.mediaDevices.getUserMedia({ audio: true, video: false }).then(process_audio);
|
||||
if (!trial.wait_for_mic_approval) {
|
||||
// Add visual indicators to let people know we're recording
|
||||
document.querySelector('#jspsych-html-audio-response-recording-container').innerHTML = trial.recording_light;
|
||||
}
|
||||
}
|
||||
|
||||
// function to handle responses by the subject
|
||||
function process_audio(stream) {
|
||||
|
||||
if (trial.wait_for_mic_approval) {
|
||||
if (start_time === null) {
|
||||
start_trial();
|
||||
} else {
|
||||
document.querySelector('#jspsych-html-audio-response-recording-container').innerHTML = trial.recording_light;
|
||||
}
|
||||
}
|
||||
|
||||
// This code largely thanks to skyllo at
|
||||
// http://air.ghost.io/recording-to-an-audio-file-using-html5-and-js/
|
||||
|
||||
// store streaming data chunks in array
|
||||
const chunks = [];
|
||||
// create media recorder instance to initialize recording
|
||||
// Note: the MediaRecorder function is not supported in Safari or Edge
|
||||
|
||||
//ADD check for browser! FROM https://experiments.ppls.ed.ac.uk/, THANKS TO ANNIE HOLTZ AND KENNY SMITH
|
||||
|
||||
var wrong_browser_message = "Sorry, it's not possible to run the experiment on your web browser. Please try using Chrome or Firefox instead.";
|
||||
var declined_audio_message = "You must allow audio recording to take part in the experiment. Please reload the page and allow access to your microphone to proceed.";
|
||||
|
||||
// function that throws error and displays message if experiment is run in browsers that do not support MediaRecorder, or if microphone access is denied
|
||||
function errorQuit(message) {
|
||||
var body = document.getElementsByTagName('body')[0];
|
||||
body.innerHTML = '<p style="color: #FF0000">'+message+'</p>'+body.innerHTML;//defines the style of error messages
|
||||
throw error;
|
||||
};
|
||||
|
||||
//either starts handlerFunction if access to microphone is enabeled or catches that it is blocked and calls errorQuit function
|
||||
if(trial.enable_mic_message){
|
||||
navigator.mediaDevices.getUserMedia({audio:true})
|
||||
.then(stream => {handlerFunction(stream)})
|
||||
.catch(error => {errorQuit(declined_audio_message)});
|
||||
}else{
|
||||
recorder = new MediaRecorder(stream)
|
||||
stream = recorder.stream
|
||||
handlerFunction(stream)
|
||||
}
|
||||
//function that catches incompatibility with MediaRecorder (e.g. in Safari or Edge)
|
||||
function handlerFunction(stream) {
|
||||
try {
|
||||
recorder = new MediaRecorder(stream);
|
||||
recorder.data = [];
|
||||
recorder.wrapUp = false;
|
||||
recorder.ondataavailable = function(e) {
|
||||
// add stream data to chunks
|
||||
chunks.push(e.data);
|
||||
if (recorder.wrapUp) {
|
||||
if (typeof trial.postprocessing !== 'undefined') {
|
||||
trial.postprocessing(chunks)
|
||||
.then(function(processedData) {
|
||||
onRecordingFinish(processedData);
|
||||
});
|
||||
} else {
|
||||
// should never fire - trial.postprocessing should use the default function if
|
||||
// not passed in via trial parameters
|
||||
onRecordingFinish(chunks);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
// start recording with 1 second time between receiving 'ondataavailable' events
|
||||
recorder.start(1000);
|
||||
|
||||
if(trial.manually_end_recording == false){
|
||||
// setTimeout to stop recording after 4 seconds
|
||||
setTimeout(function() {
|
||||
// this will trigger one final 'ondataavailable' event and set recorder state to 'inactive'
|
||||
recorder.stop();
|
||||
recorder.wrapUp = true;
|
||||
}, trial.buffer_length);
|
||||
}else{
|
||||
//wait for response from keyboard to end recording
|
||||
var keyboardListener = jsPsych.pluginAPI.getKeyboardResponse({
|
||||
callback_function: after_response,
|
||||
valid_responses: trial.manually_end_recording_key,
|
||||
rt_method: 'performance',
|
||||
persist: false,
|
||||
allow_held_key: false
|
||||
});
|
||||
|
||||
|
||||
}
|
||||
} catch(error) {
|
||||
errorQuit(wrong_browser_message);
|
||||
};
|
||||
}
|
||||
|
||||
// navigator.mediaDevices.getUserMedia({audio:true});
|
||||
//recorder = new MediaRecorder(stream);
|
||||
//recorder.data = [];
|
||||
//recorder.wrapUp = false;
|
||||
|
||||
}
|
||||
|
||||
var after_response = function(info){
|
||||
|
||||
// after a valid response, the stimulus will have the CSS class 'responded'
|
||||
// which can be used to provide visual feedback that a response was recorded
|
||||
display_element.querySelector('#jspsych-html-audio-response-stimulus').className += ' responded';
|
||||
|
||||
// only record the first response
|
||||
if (response.key == null) {
|
||||
response = info;
|
||||
}
|
||||
// this will trigger one final 'ondataavailable' event and set recorder state to 'inactive'
|
||||
recorder.stop();
|
||||
recorder.wrapUp = true;
|
||||
}
|
||||
|
||||
|
||||
function showPlaybackTools(data) {
|
||||
// Audio Player
|
||||
let playerDiv = display_element.querySelector('#jspsych-html-audio-response-audio-container');
|
||||
let url;
|
||||
if (data instanceof Blob) {
|
||||
const blob = new Blob(data, { type: 'audio/webm' });
|
||||
url = (URL.createObjectURL(blob));
|
||||
} else {
|
||||
url = data;
|
||||
}
|
||||
let player = playerDiv.querySelector('#jspsych-html-audio-response-audio');
|
||||
player.src = url;
|
||||
player.style.visibility = "visible";
|
||||
// Okay/rerecord buttons
|
||||
let buttonDiv = document.querySelector('#jspsych-html-audio-response-buttons');
|
||||
let rerecord = buttonDiv.querySelector('#jspsych-html-audio-response-rerecord');
|
||||
let okay = buttonDiv.querySelector('#jspsych-html-audio-response-okay');
|
||||
rerecord.style.visibility = 'visible';
|
||||
okay.style.visibility = 'visible';
|
||||
// Save ids of things we want to hide later:
|
||||
playbackElements = [player.id, okay.id, rerecord.id];
|
||||
}
|
||||
|
||||
function onRecordingFinish(data) {
|
||||
// switch to the off visual indicator
|
||||
let light = document.querySelector('#jspsych-html-audio-response-recording-container');
|
||||
if (light !== null)
|
||||
light.innerHTML = trial.recording_light_off;
|
||||
// measure rt
|
||||
let end_time = performance.now();
|
||||
let rt = end_time - start_time;
|
||||
response.audio_data = data.str;
|
||||
response.audio_url = data.url;
|
||||
response.rt = rt;
|
||||
|
||||
if (trial.response_ends_trial) {
|
||||
end_trial();
|
||||
} else if (trial.allow_playback) { // only allow playback if response doesn't end trial
|
||||
showPlaybackTools(response.audio_url);
|
||||
} else {
|
||||
// fallback in case response_ends_trial and allow_playback are both false,
|
||||
// which would mean the trial never ends
|
||||
end_trial();
|
||||
}
|
||||
}
|
||||
|
||||
// function to end trial when it is time
|
||||
function end_trial() {
|
||||
// kill any remaining setTimeout handlers
|
||||
jsPsych.pluginAPI.clearAllTimeouts();
|
||||
//kill keyboard listeners
|
||||
jsPsych.pluginAPI.cancelAllKeyboardResponses();
|
||||
|
||||
// gather the data to store for the trial
|
||||
let trial_data = {
|
||||
"rt": response.rt,
|
||||
"stimulus": trial.stimulus,
|
||||
"audio_data": response.audio_data,
|
||||
"key_press": response.key
|
||||
};
|
||||
|
||||
// clear the display
|
||||
display_element.innerHTML = '';
|
||||
|
||||
// move on to the next trial
|
||||
jsPsych.finishTrial(trial_data);
|
||||
}
|
||||
|
||||
if (trial.wait_for_mic_approval) {
|
||||
start_recording();
|
||||
} else {
|
||||
start_trial();
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
return plugin;
|
||||
})();
|
||||
Loading…
Reference in New Issue
Block a user