basic linear spectral manipulation!

1 files changed, 39 insertions, 12 deletions

diff --git a/client/lib/sampler.js b/client/lib/sampler.js
index 481a940..9a1b1fc 100644
--- a/client/lib/sampler.js
+++ b/client/lib/sampler.js
@@ -1,21 +1,20 @@
 import Tone from 'tone'
-import { lerp, choice } from './util'
+import { choice, clamp } from './util'
+import spectrum from './spectrum'
 
-const player_count = 2
-const filter_count = 3
-
-const crossfaders = []
+const player_count = 1
 
 export default class Sampler {
   constructor(path, count){
     this.samples = (() => {
       let s = '', a = []
       for (let i = 1; i < count; i++) {
-        const s = i < 10 ? '0' + i : 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 = []
@@ -38,24 +37,52 @@ export default class Sampler {
     return choice(this.samples)
   }
   play(freq, time, output) {
-    const best = this.choice()
-    best.index = (best.index + 1) % player_count
-
-    const player = best.players[ best.index ]
+    const { player, best } = this.getPlayer()
 
     freq = freq || best.root
+    player.playbackRate = freq / best.root
+
     time = time || Tone.now()
 
-    player.playbackRate = freq / best.root
     if (player.loaded) {
       player.stop()
       player.disconnect()
       player.connect(output)
       player.start(time)
     } else {
-      console.log('loading')
+      // 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,
+    }
+  }
 }