WASM port

[ggerganov]

We can easily build whisper.cpp as a WASM library using Emscripten:

mkdir build-em
cd build-em
emcmake cmake ..
make

It looks like a big subset of SIMD intrinsics are already supported, so the performance might not be really bad:

https://emscripten.org/docs/porting/simd.html

So let's try running whisper.cpp directly in the browser!

• The model file could either be fetched on load, or the user can drag and drop it in the browser window
• We need a simple page that records a short audio at 16 kHz sampling rate and passes it to the WASM module for transcription. Probably something similar to this ggwave example can be used

[richardburleigh]

Great to see you're looking at WASM!

I actually attempted it a few days ago but failed due to the medium model being too big to load (I know, obvious in hindsight). My use case is translation so the tiny model isn't applicable, but this is a really exciting development anyway.

[ggerganov]

The WASM example is now fully functional:

examples/whisper.wasm

The performance is better than I expected thanks to the WASM SIMD intrinsics.
It seems that the only browser that is not supported at the moment is Safari.

Would love to hear some feedback if someone gives it a try!