add python API and examples for TTS (#364)

sherpa-onnx/python/csrc/offline-tts.cc

@@ -0,0 +1,46 @@
+// sherpa-onnx/python/csrc/offline-tts.cc
+//
+// Copyright (c)  2023  Xiaomi Corporation
+#include "sherpa-onnx/python/csrc/offline-tts.h"
+
+#include "sherpa-onnx/csrc/offline-tts.h"
+#include "sherpa-onnx/python/csrc/offline-tts-model-config.h"
+
+namespace sherpa_onnx {
+
+static void PybindGeneratedAudio(py::module *m) {
+  using PyClass = GeneratedAudio;
+  py::class_<PyClass>(*m, "GeneratedAudio")
+      .def(py::init<>())
+      .def_readwrite("samples", &PyClass::samples)
+      .def_readwrite("sample_rate", &PyClass::sample_rate)
+      .def("__str__", [](PyClass &self) {
+        std::ostringstream os;
+        os << "GeneratedAudio(sample_rate=" << self.sample_rate << ", ";
+        os << "num_samples=" << self.samples.size() << ")";
+        return os.str();
+      });
+}
+
+static void PybindOfflineTtsConfig(py::module *m) {
+  PybindOfflineTtsModelConfig(m);
+
+  using PyClass = OfflineTtsConfig;
+  py::class_<PyClass>(*m, "OfflineTtsConfig")
+      .def(py::init<>())
+      .def(py::init<const OfflineTtsModelConfig &>(), py::arg("model"))
+      .def_readwrite("model", &PyClass::model)
+      .def("__str__", &PyClass::ToString);
+}
+
+void PybindOfflineTts(py::module *m) {
+  PybindOfflineTtsConfig(m);
+  PybindGeneratedAudio(m);
+
+  using PyClass = OfflineTts;
+  py::class_<PyClass>(*m, "OfflineTts")
+      .def(py::init<const OfflineTtsConfig &>(), py::arg("config"))
+      .def("generate", &PyClass::Generate);
+}
+
+}  // namespace sherpa_onnx