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Structure for browser decoders. Some work on decoding.

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This commit is contained in:
Jake Archibald
2020-11-06 13:05:12 +00:00
parent 4b8c0178fe
commit ec586bb529
33 changed files with 670 additions and 437 deletions
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10
src/features/decoders/webp/worker/webpDecode.ts
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@@ -12,16 +12,20 @@
*/
import webpDecoder, { WebPModule } from 'codecs/webp/dec/webp_dec';
import wasmUrl from 'url:codecs/webp/dec/webp_dec.wasm';
import { initEmscriptenModule } from 'features/util';
import { initEmscriptenModule, blobToArrayBuffer } from 'features/util';
let emscriptenModule: Promise<WebPModule>;
export default async function decode(data: ArrayBuffer): Promise<ImageData> {
export default async function decode(blob: Blob): Promise<ImageData> {
if (!emscriptenModule) {
emscriptenModule = initEmscriptenModule(webpDecoder, wasmUrl);
}
const module = await emscriptenModule;
const [module, data] = await Promise.all([
emscriptenModule,
blobToArrayBuffer(blob),
]);
const result = module.decode(data);
if (!result) throw new Error('Decoding error');
return result;