remove neume.AudioBus#fade()

mohayonao · Dec 25, 2014 · 9fe2931 · 9fe2931
1 parent 3fbae72
commit 9fe2931
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diff --git a/src/control/audio-bus.js b/src/control/audio-bus.js
@@ -30,22 +30,6 @@ function NeuAudioBus(context) {
 
 NeuAudioBus.$$name = "NeuAudioBus";
 
-NeuAudioBus.prototype.fade = function(t, val, dur) {
-  t = util.finite(this.context.toSeconds(t)) || this.context.currentTime;
-  val = util.finite(val);
-  dur = util.finite(this.context.toSeconds(dur));
-
-  var v0 = this.outlet.gain.value;
-  var v1 = val;
-  var vT = v0 + (v1 - v0) * 0.99;
-  var tC = -Math.max(1e-6, dur) / Math.log((vT - v1) / (v0 - v1));
-
-  this.outlet.gain.setTargetAtTime(v1, t, tC);
-  this.outlet.gain.setValueAtTime(v1, t + dur);
-
-  return this;
-};
-
 NeuAudioBus.prototype.toAudioNode = function() {
   return this.outlet;
 };

diff --git a/test/control/audio-bus.js b/test/control/audio-bus.js
@@ -63,42 +63,6 @@ describe("neume.AudioBus", function() {
     });
   });
 
-  describe("#fade", function() {
-    it("(): self", function() {
-      var bus = new neume.AudioBus(context);
-      var outlet = bus.toAudioNode();
-
-      bus.fade();
-
-      assert(closeTo(outlet.gain.$valueAtTime(1.000), 0.000, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(1.250), 0.000, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(1.500), 0.000, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(1.750), 0.000, 1e-2));
-    });
-    it("(t: number|string, val: number, dur: number|string): self", function() {
-      var bus = new neume.AudioBus(context);
-      var outlet = bus.toAudioNode();
-
-      bus.fade(2, 0.5, 2);
-
-      assert(closeTo(outlet.gain.$valueAtTime(1.000), 1.000, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(1.250), 1.000, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(1.500), 1.000, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(1.750), 1.000, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(2.000), 1.000, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(2.250), 0.781, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(2.500), 0.658, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(2.750), 0.588, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(3.000), 0.550, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(3.250), 0.528, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(3.500), 0.515, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(3.750), 0.508, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(4.000), 0.500, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(4.500), 0.500, 1e-2));
-      assert(closeTo(outlet.gain.$valueAtTime(5.000), 0.500, 1e-2));
-    });
-  });
-
   describe("#toAudioNode", function() {
     it("(): self", function() {
       var bus = new neume.AudioBus(context);