102 lines
2.2 KiB
JavaScript
102 lines
2.2 KiB
JavaScript
var audio = (function(){
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var audio = {}
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var context = new AudioContext()
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var source
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var current = ""
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var timeout
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var bufs = {}
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var sources = {}
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audio.preload = function(site, loader){
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loader.register(site.domain + "_sound")
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var request = new XMLHttpRequest()
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request.open('GET', site.sound_url, true)
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request.responseType = 'arraybuffer'
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request.onload = function() {
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context.decodeAudioData(request.response, function(buf) {
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bufs[site.domain] = buf
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loader.ready(site.domain + "_sound")
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}, function () { console.error('The request failed.') } )
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}
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request.onerror = function() {
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ytmnd.error()
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}
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request.send()
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}
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audio.loaded = function(domain){
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return (domain in bufs)
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}
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audio.make_source = function(domain){
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var buf = bufs[domain]
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var source = context.createBufferSource()
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source.connect(context.destination)
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source.buffer = buf
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sources[domain] = sources[domain] || []
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sources[domain].push(source)
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return source
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}
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audio.play = function(domain){
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console.log("play", domain)
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current = domain
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var source
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var startTime = context.currentTime
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var delay
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clearTimeout(timeout);
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(function loop(){
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if (source) {
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var dt = context.currentTime - startTime
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console.log("got a source", dt, delay)
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if (dt > 20) {
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ytmnd.next()
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}
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else {
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timeout = setTimeout(loop, delay)
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source.start(0)
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source.started = true
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source = audio.make_source(domain)
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}
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}
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else {
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timeout = setTimeout(loop, 0)
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source = audio.make_source(domain)
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delay = source.buffer.duration * 1000 - (source.buffer.duration < 2 ? 0 : 60)
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}
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})()
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}
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audio.stop_current = function(){
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audio.stop(current)
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current = ""
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}
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audio.stop = function(domain){
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if (! sources[domain]) return
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clearTimeout(timeout)
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sources[domain].forEach(function(source){
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if (source.started) {
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source.stop(0)
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}
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})
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sources[domain] = []
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delete bufs[domain]
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}
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return audio
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})()
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