AVIF in worker

src_old/codecs/avif/encoder.ts

@@ -0,0 +1,24 @@
+import avif_enc, { AVIFModule } from '../../../codecs/avif/enc/avif_enc';
+import wasmUrl from '../../../codecs/avif/enc/avif_enc.wasm';
+import { EncodeOptions } from './encoder-meta';
+import { initEmscriptenModule } from '../util';
+
+let emscriptenModule: Promise<AVIFModule>;
+
+export async function encode(
+  data: ImageData,
+  options: EncodeOptions,
+): Promise<ArrayBuffer> {
+  if (!emscriptenModule)
+    emscriptenModule = initEmscriptenModule(avif_enc, wasmUrl);
+
+  const module = await emscriptenModule;
+  const result = module.encode(data.data, data.width, data.height, options);
+
+  if (!result) {
+    throw new Error('Encoding error');
+  }
+
+  // wasm can’t run on SharedArrayBuffers, so we hard-cast to ArrayBuffer.
+  return result.buffer as ArrayBuffer;
+}