Add C++ runtime for Matcha-TTS (#1627)

sherpa-onnx/csrc/hifigan-vocoder.h

@@ -0,0 +1,38 @@
+// sherpa-onnx/csrc/hifigan-vocoder.h
+//
+// Copyright (c)  2024  Xiaomi Corporation
+
+#ifndef SHERPA_ONNX_CSRC_HIFIGAN_VOCODER_H_
+#define SHERPA_ONNX_CSRC_HIFIGAN_VOCODER_H_
+
+#include <memory>
+#include <string>
+
+#include "onnxruntime_cxx_api.h"  // NOLINT
+
+namespace sherpa_onnx {
+
+class HifiganVocoder {
+ public:
+  ~HifiganVocoder();
+
+  HifiganVocoder(int32_t num_threads, const std::string &provider,
+                 const std::string &model);
+
+  template <typename Manager>
+  HifiganVocoder(Manager *mgr, int32_t num_threads, const std::string &provider,
+                 const std::string &model);
+
+  /** @param mel A float32 tensor of shape (batch_size, feat_dim, num_frames).
+   *  @return Return a float32 tensor of shape (batch_size, num_samples).
+   */
+  Ort::Value Run(Ort::Value mel) const;
+
+ private:
+  class Impl;
+  std::unique_ptr<Impl> impl_;
+};
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_HIFIGAN_VOCODER_H_