Properly split encoder and decoder

codecs/README.md

@@ -1,6 +1,6 @@
 # Codecs
 
-This folder contains a self-contained sub-project for each codec that squoosh supports.
+This folder contains a self-contained sub-project for each encoder and decoder that squoosh supplies.
 
 ## Build
 
@@ -11,22 +11,6 @@ $ npm install
 $ npm run build
 ```
 
-This will build two files: `<codec name>_codec.js` and `<codec name>_codec.wasm`. Due to some current limitations in Emscripten, both of these files have to be served from the root folder. When the `.js` file is loaded, a global `<codec name>` is created with the same API as an [Emscripten `Module`](https://kripken.github.io/emscripten-site/docs/api_reference/module.html).
+This will build two files: `<codec name>_<enc or dec>.js` and `<codec name>_<enc or dec>.wasm`. It will most likely be necessary to set [`Module["locateFile"]`](https://kripken.github.io/emscripten-site/docs/api_reference/module.html#affecting-execution) to sucessfully load the `.wasm` file. When the `.js` file is loaded, a global `<codec name>_<enc or dec>` is created with the same API as an [Emscripten `Module`](https://kripken.github.io/emscripten-site/docs/api_reference/module.html).
 
-Each codec offers at least 2 functions:
-
-- `void encode(uint8_t* img_in, int width, int height, float quality)`
-- `void decode(???)`
-
-Example:
-
-```html
-<!-- *_codec.{wasm,js} need to be in / -->
-<script src="/mozjpeg_codec.js"></script>
-<script>
-  mozjpeg.onRuntimeInitialized = _ => {
-    const encode = mozjpeg.cwrap('encode', '', ['number', 'number', 'number', 'number']);
-    /* ... */
-  };
-</script>
-```
+Each codec will document its API in its README.