Add WebAssembly for ASR (#604)

wasm/asr/assets/README.md

@@ -0,0 +1,82 @@
+# Introduction
+
+Please refer to
+https://github.com/k2-fsa/sherpa-onnx/releases/tag/asr-models
+or
+https://k2-fsa.github.io/sherpa/onnx/pretrained_models/index.html
+to download a model.
+
+# Streaming ASR
+
+## Transducer
+```bash
+cd sherpa-onnx/wasm/asr/assets
+
+wget -q https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20.tar.bz2
+tar xvf sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20.tar.bz2
+rm sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20.tar.bz2
+
+# Note it is not an error that we rename encoder.int8.onnx to encoder.onnx
+
+mv sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/encoder-epoch-99-avg-1.int8.onnx encoder.onnx
+mv sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/decoder-epoch-99-avg-1.onnx decoder.onnx
+mv sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/joiner-epoch-99-avg-1.int8.onnx joiner.onnx
+mv sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/tokens.txt ./
+rm -rf sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/
+
+cd ../../..
+
+./build-wasm-simd-asr.sh
+```
+
+You should have the following files in `assets` before you can run
+`build-wasm-simd-asr.sh`
+
+```
+assets fangjun$ tree -L 1
+.
+├── README.md
+├── decoder.onnx
+├── encoder.onnx
+├── joiner.onnx
+└── tokens.txt
+
+0 directories, 5 files
+```
+
+## Paraformer
+
+```
+wget https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-streaming-paraformer-bilingual-zh-en.tar.bz2
+tar xvf sherpa-onnx-streaming-paraformer-bilingual-zh-en.tar.bz2
+rm sherpa-onnx-streaming-paraformer-bilingual-zh-en.tar.bz2
+
+mv sherpa-onnx-streaming-paraformer-bilingual-zh-en/encoder.int8.onnx encoder.onnx
+mv sherpa-onnx-streaming-paraformer-bilingual-zh-en/decoder.int8.onnx decoder.onnx
+mv sherpa-onnx-streaming-paraformer-bilingual-zh-en/tokens.txt ./
+
+rm -rf sherpa-onnx-streaming-paraformer-bilingual-zh-en
+
+cd ../
+
+sed -i.bak s/"type = 0"/"type = 1"/g ./sherpa-onnx.js
+sed -i.bak s/Zipformer/Paraformer/g ./index.html
+
+cd ../..
+
+./build-wasm-simd-asr.sh
+```
+
+You should have the following files in `assets` before you can run
+`build-wasm-simd-asr.sh`
+
+```
+assets fangjun$ tree -L 1
+.
+├── README.md
+├── decoder.onnx
+├── encoder.onnx
+└── tokens.txt
+
+0 directories, 4 files
+```