Support adding punctuations to the speech recogntion result (#761)

sherpa-onnx/csrc/offline-punctuation-impl.h

@@ -0,0 +1,27 @@
+// sherpa-onnx/csrc/offline-punctuation-impl.h
+//
+// Copyright (c)  2024  Xiaomi Corporation
+#ifndef SHERPA_ONNX_CSRC_OFFLINE_PUNCTUATION_IMPL_H_
+#define SHERPA_ONNX_CSRC_OFFLINE_PUNCTUATION_IMPL_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "sherpa-onnx/csrc/offline-punctuation.h"
+
+namespace sherpa_onnx {
+
+class OfflinePunctuationImpl {
+ public:
+  virtual ~OfflinePunctuationImpl() = default;
+
+  static std::unique_ptr<OfflinePunctuationImpl> Create(
+      const OfflinePunctuationConfig &config);
+
+  virtual std::string AddPunctuation(const std::string &text) const = 0;
+};
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_OFFLINE_PUNCTUATION_IMPL_H_