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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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//
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/**
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* Atto recordrtc library functions for function abstractions
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*
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* @package atto_recordrtc
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* @author Jesus Federico (jesus [at] blindsidenetworks [dt] com)
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* @author Jacob Prud'homme (jacob [dt] prudhomme [at] blindsidenetworks [dt] com)
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* @copyright 2017 Blindside Networks Inc.
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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// ESLint directives.
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/* eslint-disable camelcase */
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// Scrutinizer CI directives.
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/** global: M */
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/** global: Y */
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M.atto_recordrtc = M.atto_recordrtc || {};
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// Shorten access to module namespaces.
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var cm = M.atto_recordrtc.commonmodule,
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am = M.atto_recordrtc.abstractmodule;
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M.atto_recordrtc.abstractmodule = {
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// A helper for making a Moodle alert appear.
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// Subject is the content of the alert (which error ther alert is for).
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// Possibility to add on-alert-close event.
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show_alert: function(subject, onCloseEvent) {
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Y.use('moodle-core-notification-alert', function() {
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var dialogue = new M.core.alert({
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title: M.util.get_string(subject + '_title', 'atto_recordrtc'),
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message: M.util.get_string(subject, 'atto_recordrtc')
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});
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if (onCloseEvent) {
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dialogue.after('complete', onCloseEvent);
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}
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});
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},
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// Handle getUserMedia errors.
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handle_gum_errors: function(error, commonConfig) {
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var btnLabel = M.util.get_string('recordingfailed', 'atto_recordrtc'),
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treatAsStopped = function() {
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commonConfig.onMediaStopped(btnLabel);
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};
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// Changes 'CertainError' -> 'gumcertain' to match language string names.
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var stringName = 'gum' + error.name.replace('Error', '').toLowerCase();
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// After alert, proceed to treat as stopped recording, or close dialogue.
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if (stringName !== 'gumsecurity') {
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am.show_alert(stringName, treatAsStopped);
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} else {
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am.show_alert(stringName, function() {
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cm.editorScope.closeDialogue(cm.editorScope);
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});
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}
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},
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// Select best options for the recording codec.
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select_rec_options: function(recType) {
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var types, options;
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if (recType === 'audio') {
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types = [
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// Firefox supports webm and ogg but Chrome only supports ogg.
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// So we use ogg to maximize the compatibility.
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'audio/ogg;codecs=opus',
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// Safari supports mp4.
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'audio/mp4;codecs=opus',
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'audio/mp4;codecs=wav',
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'audio/mp4;codecs=mp3',
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];
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options = {
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audioBitsPerSecond: window.parseInt(cm.editorScope.get('audiobitrate'))
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};
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} else {
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types = [
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// Support webm as a preference.
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// This container supports both vp9, and vp8.
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// It does not support AVC1/h264 at all.
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// It is supported by Chromium, and Firefox browsers, but not Safari.
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'video/webm;codecs=vp9,opus',
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'video/webm;codecs=vp8,opus',
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// Fall back to mp4 if webm is not available.
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// The mp4 container supports v9, and h264 but neither of these are supported for recording on other
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// browsers.
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// In addition to this, we can record in v9, but VideoJS does not support an mp4 containern with v9 codec
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// for playback. We leave it as a final option as a just-in-case.
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'video/mp4;codecs=h264,opus',
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'video/mp4;codecs=h264,wav',
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'video/mp4;codecs=v9,opus',
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];
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options = {
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audioBitsPerSecond: window.parseInt(cm.editorScope.get('audiobitrate')),
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videoBitsPerSecond: window.parseInt(cm.editorScope.get('videobitrate'))
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};
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}
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var possibleTypes = types.reduce(function(result, type) {
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result.push(type);
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// Safari seems to use codecs: instead of codecs=.
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// It is safe to add both, so we do, but we want them to remain in order.
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result.push(type.replace('=', ':'));
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return result;
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}, []);
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var compatTypes = possibleTypes.filter(function(type) {
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return window.MediaRecorder.isTypeSupported(type);
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});
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if (compatTypes.length !== 0) {
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options.mimeType = compatTypes[0];
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}
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return options;
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}
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};
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