Add C++ support for streaming NeMo CTC models. (#857)

sherpa-onnx/csrc/online-nemo-ctc-model-config.h

@@ -0,0 +1,28 @@
+// sherpa-onnx/csrc/online-nemo-ctc-model-config.h
+//
+// Copyright (c)  2024  Xiaomi Corporation
+#ifndef SHERPA_ONNX_CSRC_ONLINE_NEMO_CTC_MODEL_CONFIG_H_
+#define SHERPA_ONNX_CSRC_ONLINE_NEMO_CTC_MODEL_CONFIG_H_
+
+#include <string>
+
+#include "sherpa-onnx/csrc/parse-options.h"
+
+namespace sherpa_onnx {
+
+struct OnlineNeMoCtcModelConfig {
+  std::string model;
+
+  OnlineNeMoCtcModelConfig() = default;
+
+  explicit OnlineNeMoCtcModelConfig(const std::string &model) : model(model) {}
+
+  void Register(ParseOptions *po);
+  bool Validate() const;
+
+  std::string ToString() const;
+};
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_ONLINE_NEMO_CTC_MODEL_CONFIG_H_