updating p5.sound

Author: therewasaguy

lib/addons/p5.sound.js

@@ -1,4 +1,4 @@
-/*! p5.sound.js v0.14 2014-08-20 */
+/*! p5.sound.js v0.14 2014-08-22 */
 /**
  *  p5.sound extends p5 with <a href="http://caniuse.com/audio-api"
  *  target="_blank">Web Audio</a> functionality including audio input,
@@ -28,7 +28,7 @@
  *  <b><a href="#/p5.Convolver">p5.Convolver:</a></b> Extends
  *  <a href="#/p5.Reverb">p5.Reverb</a> to simulate the sound of real
  *    physical spaces through convolution.<br/>
- *  <a href="#/p5.SoundRecorder">p5.SoundRecorder</a>: Record sound for playback 
+ *  <b><a href="#/p5.SoundRecorder">p5.SoundRecorder</a></b>: Record sound for playback 
  *    / save the .wav file.
  *  <br/><br/>
  *  p5.sound is on <a href="https://github.com/therewasaguy/p5.sound/">GitHub</a>.
@@ -1892,14 +1892,8 @@ signal = function () {
   p5.Signal = function (value) {
     // scales the constant output to desired output
     this.scalar = ac.createGain();
-    this.scalar.gain.maxValue = 10000;
-    this.scalar.gain.minValue = -10000;
     this.input = ac.createGain();
-    this.input.gain.maxValue = 10000;
-    this.input.gain.minValue = -10000;
     this.output = ac.createGain();
-    this.output.gain.maxValue = 10000;
-    this.output.gain.minValue = -10000;
     // the ratio of this value to the control signal
     this._syncRatio = 1;
     // connect the constant output to the scalar
@@ -2103,8 +2097,6 @@ signal = function () {
   p5.SignalMult = function (num, _input) {
     var mult = new p5.Signal();
     mult.output = mult.input;
-    mult.input.gain.maxValue = 10000;
-    mult.input.gain.minValue = -10000;
     mult.setValue = function (value) {
       if (typeof value === 'number') {
         this.input.gain.value = value;
@@ -4755,7 +4747,7 @@ soundRecorder = function () {
    *    
    *    else if (state === 2) {
    *      soundFile.play(); // play the result!
-   *      saveSound(soundFile, 'mySound.wav');
+   *      save(soundFile, 'mySound.wav');
    *      state++;
    *    }
    *  }
@@ -4971,9 +4963,64 @@ soundRecorder = function () {
     }
   }
 }(sndcore, master);
+var metro;
+metro = function () {
+  'use strict';
+  var p5sound = master;
+  var ac = p5sound.audiocontext;
+  var upTick = false;
+  var tatums = 4;
+  // lowest possible division of a beat
+  // Oscillator + Script Processor to keep time.
+  // inspired by Tone.js library's Transport (MIT license, Yotam Mann)
+  // https://github.com/TONEnoTONE/Tone.js/blob/master/Tone/core/Transport.js
+  p5.Metro = function () {
+    this.metroTicks = 0;
+    /**
+     *  watch this.oscillator for timing ticks
+     */
+    this._jsNode = p5sound.audiocontext.createScriptProcessor(this.bufferSize, 1, 1);
+    this._jsNode.onaudioprocess = this._processBuffer.bind(this);
+    this._jsNode.connect(p5.soundOut._silentNode);
+    this.oscillator = ac.createOscillator();
+    this.oscillator.type = 'square';
+    this.oscillator.connect(this._jsNode);
+    this.oscillator.start();
+    this.oscillator.frequency.value = 1;
+    this.lastTick = 0;
+  };
+  p5.Metro.prototype._processBuffer = function (event) {
+    var now = ac.currentTime;
+    var incomingBuffer = event.inputBuffer.getChannelData(0);
+    var bufferSize = this._jsNode.bufferSize;
+    for (var i = 0; i < bufferSize; i++) {
+      var sample = incomingBuffer[i];
+      if (sample > 0 && !upTick) {
+        upTick = true;
+        this._processTick(now + i / ac.sampleRate);
+      } else if (sample < 0 && upTick) {
+        upTick = false;
+      }
+    }
+  };
+  p5.Metro.prototype._processTick = function (tickTime) {
+    this.metroTicks += 1;
+    console.log('interval: ' + (tickTime - this.lastTick));
+    this.lastTick = tickTime;
+  };
+  p5.Metro.prototype.setBPM = function (bpm, rampTime) {
+    // var tatumFreq = this.secondsToFrequency(this.notationToSeconds(tatum.toString() + "n", bpm, transportTimeSignature));
+    var freq = bpm / 60 / 2 * tatums;
+    var ramp = rampTime || 0;
+    this.oscillator.frequency.linearRampToValueAtTime(freq, ramp);
+  };
+  p5.Metro.prototype.getBPM = function (tempo) {
+    return this.oscillator.frequency.value * 60 * 2;
+  };
+}(master);
 var src_app;
 src_app = function () {
   'use strict';
   var p5SOUND = sndcore;
   return p5SOUND;
-}(sndcore, master, helpers, soundfile, amplitude, fft, signal, oscillator, env, pulse, noise, audioin, filter, delay, reverb, looper, soundRecorder);
+}(sndcore, master, helpers, soundfile, amplitude, fft, signal, oscillator, env, pulse, noise, audioin, filter, delay, reverb, looper, soundRecorder, metro);