Support TDNN models from the yesno recipe from icefall (#262)

sherpa-onnx/csrc/offline-tdnn-model-config.cc

@@ -0,0 +1,34 @@
+// sherpa-onnx/csrc/offline-tdnn-model-config.cc
+//
+// Copyright (c)  2023  Xiaomi Corporation
+
+#include "sherpa-onnx/csrc/offline-tdnn-model-config.h"
+
+#include "sherpa-onnx/csrc/file-utils.h"
+#include "sherpa-onnx/csrc/macros.h"
+
+namespace sherpa_onnx {
+
+void OfflineTdnnModelConfig::Register(ParseOptions *po) {
+  po->Register("tdnn-model", &model, "Path to onnx model");
+}
+
+bool OfflineTdnnModelConfig::Validate() const {
+  if (!FileExists(model)) {
+    SHERPA_ONNX_LOGE("tdnn model file %s does not exist", model.c_str());
+    return false;
+  }
+
+  return true;
+}
+
+std::string OfflineTdnnModelConfig::ToString() const {
+  std::ostringstream os;
+
+  os << "OfflineTdnnModelConfig(";
+  os << "model=\"" << model << "\")";
+
+  return os.str();
+}
+
+}  // namespace sherpa_onnx