89 lines
2.2 KiB
JavaScript
89 lines
2.2 KiB
JavaScript
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/* Usage:
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mediator.on('audio:play', playTones );
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mediator.on('audio:on', on );
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mediator.on('audio:off', off );
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mediator.on('audio:mute', mute );
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mediator.on('audio:unmute', unmute );
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*/
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// Sounds module, used for emitting those annoying bl-up sounds when receiving a message
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import queue from './queue.js';
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import mediator from 'qbus';
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import templates from './templates.js';
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var
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// Private variables
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ac = false,
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enabled = true,
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muted = false,
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// Recursive function for playing tones
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// accepts an array of [tone,start_ms,duration_ms] - entries
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playTones = function (tones, i) {
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// Parameter defaults
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i = (i === undefined) ? 0 : i;
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// Stop if we've reached the end of iteration, and require ac, also stop if we're muted
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if (!ac || !enabled || !(i < Object.keys(tones).length) || muted) {
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return;
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}
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// Add tones to execution queue
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var current_tones = tones[i],
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freqs = current_tones[0],
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start = current_tones[1],
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duration = current_tones[2];
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var o = ac.createOscillator();
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var g = ac.createGain();
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o.frequency.value = freqs;
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o.connect(g);
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g.gain.value = 0.25;
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g.connect(ac.destination);
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queue.add_function_delayed(start,function() { o.noteOn ? o.noteOn(0) : o.start(0); });
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queue.add_function_delayed(start+duration,function() { o.noteOff ? o.noteOff(0) : o.stop(0); });
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// Iterate, or start playing
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i++;
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if( i < Object.keys(tones).length ) {
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playTones(tones,i);
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} else {
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queue.run();
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}
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},
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on = function() {
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enabled = true;
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},
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off = function() {
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enabled = false;
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},
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mute = function() {
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muted = true;
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mediator.emit('console:info',templates.messages.muted);
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},
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unmute = function() {
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muted = false;
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mediator.emit('console:info',templates.messages.unmuted);
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};
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// Find audio context
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if (window.AudioContext || window.webkitAudioContext) {
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ac = new (window.AudioContext || window.webkitAudioContext);
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}
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// Connect events
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mediator.on('audio:play', function(tones) {playTones(tones); } );
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mediator.on('audio:on', on );
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mediator.on('audio:off', off );
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mediator.on('audio:mute', mute );
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mediator.on('audio:unmute', unmute );
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