AudioWorklet first impl

.gitignore

@@ -10,4 +10,5 @@ release/browser/manifest.edn
 yarn.lock
 release/browser/main.js
 release/browser/manifest.edn
+release/browser/processor.js.map
 libcsound/libcsound_browser.js

DEVELOPMENT.md

@@ -0,0 +1,2 @@
+Publishing to clojars:
+ - Remember to export libcsound resources which are otherwise handled by shadow-cljs hooks

examples/example1.js

@@ -4,7 +4,6 @@ const beeper = `
 instr 1
   asig = poscil:a(0.3, 440)
   outc asig, asig
-  prints "HÆÆ"
 endin`
 
 const makeBeep = `i 1 0 1`

libcsound/datauri.js

@@ -3,46 +3,98 @@
 const DataURI = require('datauri').promise;
 const fs = require('fs');
 const replace = require('replace-in-file');
-// const stdin = process.argv[2];
-
-// DataURI('libcsound/libcsound.wasm')
-//   .then(content =>
-//         {
-//           var replace_data = "'" + content + "';";
-//           // var append_data = "\nmodule.exports = Module;\n";
-
-//           const replace_options = {
-//             files: 'libcsound/libcsound.js',
-//             from: /'libcsound.wasm'/g,
-//             to: replace_data
-//           };
-
-//             try {
-//                 replace.sync(replace_options);
-//             }
-//             catch (error) {
-//                 console.error('Error occurred:', error);
-//             }
-
-//             // fs.appendFileSync('./libcsound.js', append_data)
-//         })
-//     .catch(err => { throw err; });
-
-// DataURI('libcsound/libcsound.wasm')
-//     .then(content =>
-//           {
-//               console.log(content);
-//           })
-//     .catch(err => { throw err; });
 
 DataURI('libcsound.wasm')
     .then(content =>
           {
+              // Old WebAudio
               var file1 = fs.readFileSync('libcsound/libcsound.js').toString();
-              var replc = file1.replace('libcsound.wasm', content);
+              var replc1 = file1.replace('libcsound.wasm', content);
+
+              // AudioWorklet
+              var file2 = fs.readFileSync('libcsound/libcsound.js').toString();
+              var replc2 = file2.replace('libcsound.wasm', content);
+              replc2 = replc2.replace(`ENVIRONMENT_IS_WEB = typeof window === 'object';
+ENVIRONMENT_IS_WORKER = typeof importScripts === 'function';
+ENVIRONMENT_IS_NODE = typeof process === 'object' && typeof require === 'function' && !ENVIRONMENT_IS_WEB && !ENVIRONMENT_IS_WORKER;
+ENVIRONMENT_IS_SHELL = !ENVIRONMENT_IS_WEB && !ENVIRONMENT_IS_NODE && !ENVIRONMENT_IS_WORKER;`,
+                                      `ENVIRONMENT_IS_WEB = true;\n`)
+
+              replc2 = replc2.replace(`    if (document.currentScript) {
+      scriptDirectory = document.currentScript.src;
+    }`, '');
+              // replc2 = replc2.replace(`!Module['wasmBinary'] && (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER) && typeof fetch === 'function'`, 'false');
+              replc2 = replc2.replace(`typeof fetch === 'function'`, `false`);
+              replc2 = replc2.replace(`typeof fetch === 'function'`, `false`);
+              replc2 = replc2.replace(`  function getBinary() {
+    try {
+      if (Module['wasmBinary']) {
+        return new Uint8Array(Module['wasmBinary']);
+      }
+      if (Module['readBinary']) {
+        return Module['readBinary'](wasmBinaryFile);
+      } else {
+        throw "both async and sync fetching of the wasm failed";
+      }
+    }
+    catch (err) {
+      abort(err);
+    }
+  }`, `
+
+var base64_decode = function (base64) {
+    var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    var lookup = new Uint8Array(256);
+    for (var i = 0; i < chars.length; i++) {
+        lookup[chars.charCodeAt(i)] = i;
+    }
+
+    var bufferLength = base64.length * 0.75,
+        len = base64.length, i, p = 0,
+        encoded1, encoded2, encoded3, encoded4;
+
+    if (base64[base64.length - 1] === "=") {
+        bufferLength--;
+        if (base64[base64.length - 2] === "=") {
+            bufferLength--;
+        }
+    }
+
+    var arraybuffer = new ArrayBuffer(bufferLength),
+        bytes = new Uint8Array(arraybuffer);
+
+    for (i = 0; i < len; i += 4) {
+        encoded1 = lookup[base64.charCodeAt(i)];
+        encoded2 = lookup[base64.charCodeAt(i + 1)];
+        encoded3 = lookup[base64.charCodeAt(i + 2)];
+        encoded4 = lookup[base64.charCodeAt(i + 3)];
+
+        bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
+        bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
+        bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
+    }
+
+    return arraybuffer;
+}
+
+var BASE64_MARKER = ';base64,';
+
+function convertDataURIToBinary(dataURI) {
+    var base64Index = dataURI.indexOf(BASE64_MARKER) + BASE64_MARKER.length;
+    var base64 = dataURI.substring(base64Index);
+    var raw = base64_decode(base64);
+    return raw;
+}
+
+function getBinary() {
+   return convertDataURIToBinary(wasmBinaryFile);
+}
+
+`)
 
               try {
-                  fs.writeFileSync('libcsound/libcsound_browser.js', replc);
+                  fs.writeFileSync('libcsound/libcsound_browser.js', replc1);
+                  fs.writeFileSync('libcsound/libcsound_browser_worklet.js', replc2);
               }
               catch (error) {
                   console.error('Error occurred:', error);