Support resampling (#77)

sherpa-onnx/python/csrc/online-stream.cc

@@ -8,13 +8,27 @@
 
 namespace sherpa_onnx {
 
+constexpr const char *kAcceptWaveformUsage = R"(
+Process audio samples.
+
+Args:
+  sample_rate:
+    Sample rate of the input samples. If it is different from the one
+    expected by the model, we will do resampling inside.
+  waveform:
+    A 1-D float32 tensor containing audio samples. It must be normalized
+    to the range [-1, 1].
+)";
+
 void PybindOnlineStream(py::module *m) {
   using PyClass = OnlineStream;
   py::class_<PyClass>(*m, "OnlineStream")
-      .def("accept_waveform",
-           [](PyClass &self, float sample_rate, py::array_t<float> waveform) {
-             self.AcceptWaveform(sample_rate, waveform.data(), waveform.size());
-           })
+      .def(
+          "accept_waveform",
+          [](PyClass &self, float sample_rate, py::array_t<float> waveform) {
+            self.AcceptWaveform(sample_rate, waveform.data(), waveform.size());
+          },
+          py::arg("sample_rate"), py::arg("waveform"), kAcceptWaveformUsage)
       .def("input_finished", &PyClass::InputFinished);
 }