Add HLG decoding for streaming CTC models (#731)

sherpa-onnx/python/csrc/online-ctc-fst-decoder-config.cc

@@ -0,0 +1,23 @@
+// sherpa-onnx/python/csrc/online-ctc-fst-decoder-config.cc
+//
+// Copyright (c)  2024  Xiaomi Corporation
+
+#include "sherpa-onnx/python/csrc/online-ctc-fst-decoder-config.h"
+
+#include <string>
+
+#include "sherpa-onnx/csrc/online-ctc-fst-decoder-config.h"
+
+namespace sherpa_onnx {
+
+void PybindOnlineCtcFstDecoderConfig(py::module *m) {
+  using PyClass = OnlineCtcFstDecoderConfig;
+  py::class_<PyClass>(*m, "OnlineCtcFstDecoderConfig")
+      .def(py::init<const std::string &, int32_t>(), py::arg("graph") = "",
+           py::arg("max_active") = 3000)
+      .def_readwrite("graph", &PyClass::graph)
+      .def_readwrite("max_active", &PyClass::max_active)
+      .def("__str__", &PyClass::ToString);
+}
+
+}  // namespace sherpa_onnx