Files
squoosh/src/codecs/decoders.ts
Jake Archibald 43def798e1 Two workers & worker termination (#198)
* Refactoring codecs

* Plugging in new processor

* Fixing decorator

* MozJPEG free issue

* Better worker aborting, and terminate workers that aren't used for 10 seconds

* Better comment

* Ooops, half-typed comment

* Uncommenting problematic line

* Surma fixed it!

* Abstracting WASM initialisation

* Better comment

* Don't need this.

* Adding ticket

* noInitalRun

* Reverting MozJPEG issue demo

* Making a const for worker timeout

* Inline docs

* Bail early rather than nesting

* Addressing nits
2018-10-28 09:17:43 +00:00

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import { nativeDecode, sniffMimeType, canDecodeImage } from '../lib/util';
import Processor from './processor';
// tslint:disable-next-line:max-line-length Its a data URL. Whatcha gonna do?
const webpFile = 'data:image/webp;base64,UklGRh4AAABXRUJQVlA4TBEAAAAvAAAAAAfQ//73v/+BiOh/AAA=';
const nativeWebPSupported = canDecodeImage(webpFile);
export async function decodeImage(blob: Blob, processor: Processor): Promise<ImageData> {
const mimeType = await sniffMimeType(blob);
try {
if (mimeType === 'image/webp' && !(await nativeWebPSupported)) {
return await processor.webpDecode(blob);
}
// Otherwise, just throw it at the browser's decoder.
return await nativeDecode(blob);
} catch (err) {
throw Error("Couldn't decode image");
}
}