script for rendering wasm to raw audio file

renderwasm.mjs

@@ -0,0 +1,8 @@
+import { readFile, writeFile } from 'fs/promises';
+
+const wasm = (await readFile('./temp_song_file.wasm'));
+
+const mod = await WebAssembly.instantiate(wasm, {});
+mod.instance.exports.render();
+const mem = mod.instance.exports.m;
+await writeFile('temp_song_file.raw', new Uint8Array(mem.buffer,mod.instance.exports.s,mod.instance.exports.l));

templates/wasm/player.wat

@@ -882,6 +882,8 @@
 
 {{- if  .RenderOnStart }}
 (start $render) ;; we run render automagically when the module is instantiated
+{{- else}}
+(export "render" (func $render))
 {{- end}}
 
 (func $render (param)