Add VAD examples using ALSA for recording (#739)

sherpa-onnx/python/csrc/wave-writer.cc

@@ -0,0 +1,27 @@
+// sherpa-onnx/python/csrc/wave-writer.cc
+//
+// Copyright (c)  2024  Xiaomi Corporation
+
+#include "sherpa-onnx/python/csrc/wave-writer.h"
+
+#include <string>
+#include <vector>
+
+#include "sherpa-onnx/csrc/wave-writer.h"
+
+namespace sherpa_onnx {
+
+void PybindWaveWriter(py::module *m) {
+  m->def(
+      "write_wave",
+      [](const std::string &filename, const std::vector<float> &samples,
+         int32_t sample_rate) -> bool {
+        bool ok =
+            WriteWave(filename, sample_rate, samples.data(), samples.size());
+
+        return ok;
+      },
+      py::arg("filename"), py::arg("samples"), py::arg("sample_rate"));
+}
+
+}  // namespace sherpa_onnx