Increased the max buffer count

This takes into account multiple multi-speaker outputs (the spec labels 18).

Author: cwoffenden

src/audio_worklet.js

@@ -36,13 +36,13 @@ function createWasmAudioWorkletProcessor(audioParams) {
       this.bytesPerChannel = this.samplesPerChannel * {{{ getNativeTypeSize('float') }}};
 
       // Create up-front as many typed views for marshalling the output data as
-      // may be required (with an arbitrary maximum of 16, for the case where a
+      // may be required (with an arbitrary maximum of 64, for the case where a
       // multi-MB stack is passed), allocated at the *top* of the worklet's
       // stack (and whose addresses are fixed). The 'minimum alloc' firstly
       // stops STACK_OVERFLOW_CHECK failing (since the stack will be full, and
       // 16 being the minimum allocation size due to alignments) and leaves room
       // for a single AudioSampleFrame as a minumum.
-      this.maxBuffers = Math.min(((wwParams.stackSize - /*minimum alloc*/ 16) / this.bytesPerChannel) | 0, /*sensible limit*/ 16);
+      this.maxBuffers = Math.min(((wwParams.stackSize - /*minimum alloc*/ 16) / this.bytesPerChannel) | 0, /*sensible limit*/ 64);
 #if ASSERTIONS
       console.assert(this.maxBuffers > 0, `AudioWorklet needs more stack allocating (at least ${this.bytesPerChannel})`);
 #endif