Adds constant0Hack

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.5.7] - 2021-10-27
+
+### Added
+
+- adds a hack that spews 0s to a context.
+
 ## [0.5.6] - 2021-10-27
 
 ### Fixed

package.json

@@ -1,6 +1,6 @@
 {
   "name": "purescript-wags",
-  "version": "0.5.5",
+  "version": "0.5.7",
   "description": "Web Audio Graphs as a Stream",
   "scripts": {
     "build": "spago build",

src/WAGS/Interpret.js

@@ -1803,3 +1803,15 @@ exports.bufferDuration = function (buffer) {
 exports.bufferNumberOfChannels = function (buffer) {
   return buffer.numberOfChannels;
 };
+exports.constant0Hack = function (context) {
+  return function() {
+    var constant = context.createConstantSource();
+    constant.offset.value = 0.0;
+    constant.connect(context.destination);
+    constant.start();
+    return function() {
+      constant.stop();
+      constant.disconnect(context.destination);
+    }
+  }
+}

src/WAGS/Interpret.purs

@@ -13,6 +13,7 @@ module WAGS.Interpret
   , audioBuffer
   , audioWorkletAddModule
   , close
+  , constant0Hack
   , connectXToY
   , context
   , contextState
@@ -217,6 +218,9 @@ foreign import makeFloatArray :: Array Number -> Effect WebAPI.BrowserFloatArray
 -- | Make a new audio context.
 foreign import context :: Effect WebAPI.AudioContext
 
+-- | Send 0s from a context immediately. This is useful on iOS so that the context doesn't switch to a suspended state.
+foreign import constant0Hack :: WebAPI.AudioContext -> Effect (Effect Unit)
+
 -- | Get the state of the context
 foreign import contextState :: WebAPI.AudioContext -> Effect String