Add Swift API for adding punctuations to text. (k2-fsa#1132)

Author: csukuangfj

.github/scripts/test-swift.sh

@@ -7,6 +7,10 @@ echo "pwd: $PWD"
 cd swift-api-examples
 ls -lh
 
+./run-add-punctuations.sh
+rm ./add-punctuations
+rm -rf sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12
+
 ./run-keyword-spotting-from-file.sh
 rm ./keyword-spotting-from-file
 rm -rf sherpa-onnx-kws-*

swift-api-examples/.gitignore

@@ -9,3 +9,4 @@ sherpa-onnx-paraformer-zh-2023-09-14
 *.bak
 streaming-hlg-decode-file
 keyword-spotting-from-file
+add-punctuations

swift-api-examples/SherpaOnnx.swift

@@ -957,3 +957,52 @@ class SherpaOnnxKeywordSpotterWrapper {
     InputFinished(stream)
   }
 }
+
+// Punctuation
+
+func sherpaOnnxOfflinePunctuationModelConfig(
+  ctTransformer: String,
+  numThreads: Int = 1,
+  debug: Int = 0,
+  provider: String = "cpu"
+) -> SherpaOnnxOfflinePunctuationModelConfig {
+  return SherpaOnnxOfflinePunctuationModelConfig(
+    ct_transformer: toCPointer(ctTransformer),
+    num_threads: Int32(numThreads),
+    debug: Int32(debug),
+    provider: toCPointer(provider)
+  )
+}
+
+func sherpaOnnxOfflinePunctuationConfig(
+  model: SherpaOnnxOfflinePunctuationModelConfig
+) -> SherpaOnnxOfflinePunctuationConfig {
+  return SherpaOnnxOfflinePunctuationConfig(
+    model: model
+  )
+}
+
+class SherpaOnnxOfflinePunctuationWrapper {
+  /// A pointer to the underlying counterpart in C
+  let ptr: OpaquePointer!
+
+  /// Constructor taking a model config
+  init(
+    config: UnsafePointer<SherpaOnnxOfflinePunctuationConfig>!
+  ) {
+    ptr = SherpaOnnxCreateOfflinePunctuation(config)
+  }
+
+  deinit {
+    if let ptr {
+      SherpaOnnxDestroyOfflinePunctuation(ptr)
+    }
+  }
+
+  func addPunct(text: String) -> String {
+    let cText = SherpaOfflinePunctuationAddPunct(ptr, toCPointer(text))
+    let ans = String(cString: cText!)
+    SherpaOfflinePunctuationFreeText(cText)
+    return ans
+  }
+}

swift-api-examples/add-punctuations.swift

@@ -0,0 +1,31 @@
+func run() {
+  let model = "./sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12/model.onnx"
+  let modelConfig = sherpaOnnxOfflinePunctuationModelConfig(
+    ctTransformer: model,
+    numThreads: 1,
+    debug: 1,
+    provider: "cpu"
+  )
+  var config = sherpaOnnxOfflinePunctuationConfig(model: modelConfig)
+
+  let punct = SherpaOnnxOfflinePunctuationWrapper(config: &config)
+
+  let textList = [
+    "这是一个测试你好吗How are you我很好thank you are you ok谢谢你",
+    "我们都是木头人不会说话不会动",
+    "The African blogosphere is rapidly expanding bringing more voices online in the form of commentaries opinions analyses rants and poetry",
+  ]
+
+  for i in 0..<textList.count {
+    let t = punct.addPunct(text: textList[i])
+    print("\nresult is:\n\(t)")
+  }
+
+}
+
+@main
+struct App {
+  static func main() {
+    run()
+  }
+}

swift-api-examples/run-add-punctuations.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+set -ex
+
+if [ ! -d ../build-swift-macos ]; then
+  echo "Please run ../build-swift-macos.sh first!"
+  exit 1
+fi
+
+if [ ! -d ./sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12 ]; then
+  curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/punctuation-models/sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12.tar.bz2
+  tar xvf sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12.tar.bz2
+  rm sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12.tar.bz2
+fi
+
+if [ ! -e ./add-punctuations ]; then
+  # Note: We use -lc++ to link against libc++ instead of libstdc++
+  swiftc \
+    -lc++ \
+    -I ../build-swift-macos/install/include \
+    -import-objc-header ./SherpaOnnx-Bridging-Header.h \
+    ./add-punctuations.swift  ./SherpaOnnx.swift \
+    -L ../build-swift-macos/install/lib/ \
+    -l sherpa-onnx \
+    -l onnxruntime \
+    -o ./add-punctuations
+
+  strip ./add-punctuations
+else
+  echo "./add-punctuations exists - skip building"
+fi
+
+export DYLD_LIBRARY_PATH=$PWD/../build-swift-macos/install/lib:$DYLD_LIBRARY_PATH
+./add-punctuations