Fix p5.SoundFile pause functionality on Firefox and Safari by moving …

…pause position logic out of AudioWorklet processor

src/audioWorklet/soundFileProcessor.js

@@ -2,29 +2,12 @@
 const processorNames = preval.require('./processorNames');
 
 class SoundFileProcessor extends AudioWorkletProcessor {
-  constructor() {
-    super();
-
-    this.paused = false;
-
-    this.port.onmessage = (event) => {
-      const data = event.data;
-      if (data.name === 'play') {
-        this.paused = false;
-      } else if (data.name === 'pause') {
-        this.paused = true;
-      }
-    };
-  }
-
   process(inputs) {
     const input = inputs[0];
     const inputChannel = input[0];
     const position = inputChannel[inputChannel.length - 1] || 0;
 
-    if (!this.paused) {
-      this.port.postMessage({ name: 'position', position: position });
-    }
+    this.port.postMessage({ name: 'position', position: position });
 
     return true;
   }

src/soundfile.js

@@ -369,7 +369,6 @@ define(function (require) {
 
     // TO DO: if already playing, create array of buffers for easy stop()
     if (this.buffer) {
-
       // reset the pause time (if it was paused)
       this._pauseTime = 0;
 
@@ -439,7 +438,6 @@ define(function (require) {
       this._counterNode.loopEnd = cueEnd;
     }
 
-    this._workletNode.port.postMessage({ name: 'play' });
   };
 
 
@@ -539,13 +537,12 @@ define(function (require) {
     var pTime = time + now;
 
     if (this.isPlaying() && this.buffer && this.bufferSourceNode) {
-      this._workletNode.port.postMessage({ name: 'pause' });
+      this._paused = true;
+      this._playing = false;
 
       this.pauseTime = this.currentTime();
       this.bufferSourceNode.stop(pTime);
       this._counterNode.stop(pTime);
-      this._paused = true;
-      this._playing = false;
 
       this._pauseTime = this.currentTime();
       // TO DO: make sure play() still starts from orig start position
@@ -1247,14 +1244,19 @@ define(function (require) {
       delete self._workletNode;
     }
     self._workletNode = new AudioWorkletNode(ac, processorNames.soundFileProcessor);
-    self._workletNode.port.onmessage = function(event) {
+    self._workletNode.port.onmessage = event => {
       if (event.data.name === 'position') {
+        // event.data.position should only be 0 when paused, but may sometimes be 0
+        // slightly before this._paused is set to true
+        if (this._paused || event.data.position === 0) {
+          return;
+        }
         this._lastPos = event.data.position;
 
         // do any callbacks that have been scheduled
         this._onTimeUpdate(self._lastPos);
       }
-    }.bind(self);
+    };
 
     // create counter buffer of the same length as self.buffer
     cNode.buffer = _createCounterBuffer( self.buffer );