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import Tone from 'tone'
import { choice, clamp } from './util'
import spectrum from './spectrum'
const player_count = 1
export default class Sampler {
constructor(path, count){
this.samples = (() => {
let s = '', a = []
for (let i = 1; i < count; i++) {
s = i < 10 ? '0' + i : i;
a.push({ root: 100, fn: path.replace(/{}/, s) })
}
return a
})()
this.length = this.samples.length
this.samples.forEach((sample) => {
sample.players = []
sample.index = -1
for (let i = 0; i < player_count; i++) {
let fn = sample.fn
if (window.location.href.match(/asdf.us/)) {
fn = '//asdf.us/glass/' + fn.replace('wav','mp3')
}
let player = new Tone.Player({
url: fn,
retrigger: true,
playbackRate: 1,
})
sample.players.push(player)
}
})
}
choice(){
return choice(this.samples)
}
play(freq, time, output) {
const { player, best } = this.getPlayer()
freq = freq || best.root
player.playbackRate = freq / best.root
time = time || Tone.now()
if (player.loaded) {
player.stop()
player.disconnect()
player.connect(output)
player.start(time)
} else {
// console.log('loading')
}
return player
}
getRandomPlayer(){
const best = this.choice()
best.index = (best.index + 1) % player_count
const player = best.players[ best.index ]
return { player, best }
}
getPlayer(n){
n = n || 0
if (n < 1) n *= this.samples.length
const best = this.samples[clamp(n|0, 0, this.samples.length-1)]
best.index = (best.index + 1) % player_count
const player = best.players[ best.index ]
return { player, best }
}
getWaveAndSpectrum(n){
const { player } = this.getPlayer(n)
const buf = player._buffer.get()
if (! buf) return { pcm: null, spec: null }
const pcm = buf.getChannelData(0)
if (! player._spectrum) {
const sr = buf.sampleRate
player._spectrum = spectrum.toSpectrum(pcm, sr)
}
return {
pcm: pcm,
spec: player._spectrum,
}
}
}
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