Support non-streaming WeNet CTC models. (#426)

sherpa-onnx/csrc/offline-wenet-ctc-model-config.cc

@@ -0,0 +1,37 @@
+// sherpa-onnx/csrc/offline-wenet-ctc-model-config.cc
+//
+// Copyright (c)  2023  Xiaomi Corporation
+
+#include "sherpa-onnx/csrc/offline-wenet-ctc-model-config.h"
+
+#include "sherpa-onnx/csrc/file-utils.h"
+#include "sherpa-onnx/csrc/macros.h"
+
+namespace sherpa_onnx {
+
+void OfflineWenetCtcModelConfig::Register(ParseOptions *po) {
+  po->Register(
+      "wenet-ctc-model", &model,
+      "Path to model.onnx from WeNet. Please see "
+      "https://github.com/k2-fsa/sherpa-onnx/pull/425 for available models");
+}
+
+bool OfflineWenetCtcModelConfig::Validate() const {
+  if (!FileExists(model)) {
+    SHERPA_ONNX_LOGE("WeNet model: %s does not exist", model.c_str());
+    return false;
+  }
+
+  return true;
+}
+
+std::string OfflineWenetCtcModelConfig::ToString() const {
+  std::ostringstream os;
+
+  os << "OfflineWenetCtcModelConfig(";
+  os << "model=\"" << model << "\")";
+
+  return os.str();
+}
+
+}  // namespace sherpa_onnx