Fix keyword spotting. (#1689)

Reset the stream right after detecting a keyword

sherpa-onnx/python/csrc/keyword-spotter.cc

@@ -67,6 +67,7 @@ void PybindKeywordSpotter(py::module *m) {
           py::arg("keywords"), py::call_guard<py::gil_scoped_release>())
       .def("is_ready", &PyClass::IsReady,
            py::call_guard<py::gil_scoped_release>())
+      .def("reset", &PyClass::Reset, py::call_guard<py::gil_scoped_release>())
       .def("decode_stream", &PyClass::DecodeStream,
            py::call_guard<py::gil_scoped_release>())
       .def(

sherpa-onnx/python/sherpa_onnx/keyword_spotter.py

@@ -104,8 +104,8 @@ class KeywordSpotter(object):
         )
 
         provider_config = ProviderConfig(
-          provider=provider,
-          device = device,
+            provider=provider,
+            device=device,
         )
 
         model_config = OnlineModelConfig(
@@ -131,6 +131,9 @@ class KeywordSpotter(object):
         )
         self.keyword_spotter = _KeywordSpotter(keywords_spotter_config)
 
+    def reset_stream(self, s: OnlineStream):
+        self.keyword_spotter.reset(s)
+
     def create_stream(self, keywords: Optional[str] = None):
         if keywords is None:
             return self.keyword_spotter.create_stream()

sherpa-onnx/python/tests/test_keyword_spotter.py

@@ -98,6 +98,9 @@ class TestKeywordSpotter(unittest.TestCase):
                     if r:
                         print(f"{r} is detected.")
                         results[i] += f"{r}/"
+
+                        keyword_spotter.reset_stream(s)
+
                 if len(ready_list) == 0:
                     break
                 keyword_spotter.decode_streams(ready_list)
@@ -158,6 +161,9 @@ class TestKeywordSpotter(unittest.TestCase):
                     if r:
                         print(f"{r} is detected.")
                         results[i] += f"{r}/"
+
+                        keyword_spotter.reset_stream(s)
+
                 if len(ready_list) == 0:
                     break
                 keyword_spotter.decode_streams(ready_list)