How to use android NNAPI? about sherpa-onnx

[csukuangfj]

Do the ASR and TTS APIs use the Android NNAPI by default if it's compiled with android-27?

No.

Or do I need to pass in some config/flag to enable this?

Yes.

---

The steps are:

1. Change
   

   sherpa-onnx/build-android-arm64-v8a.sh

   Line 87 in 49ee458

   -DANDROID_PLATFORM=android-21 ..

You need to replace 21 with 27 or greater.

2. For ASR, you need to change
   

   sherpa-onnx/sherpa-onnx/kotlin-api/OnlineRecognizer.kt

   Line 44 in 49ee458

   var provider: String = "cpu",

by replacing cpu with nnapi.

For TTS and other tasks you need to do the same thing as ASR. (I think you have got the ideas.)