Add Streaming zipformer (#50)

sherpa-onnx/csrc/cat.h

@@ -0,0 +1,28 @@
+// sherpa-onnx/csrc/cat.h
+//
+// Copyright (c)  2023  Xiaomi Corporation
+#ifndef SHERPA_ONNX_CSRC_CAT_H_
+#define SHERPA_ONNX_CSRC_CAT_H_
+
+#include <vector>
+
+#include "onnxruntime_cxx_api.h"  // NOLINT
+
+namespace sherpa_onnx {
+
+/** Cat a list of tensors along the given dim.
+ *
+ * @param allocator Allocator to allocate space for the returned tensor
+ * @param values  Pointer to a list of tensors. The shape of the tensor must
+ *                be the same except on the dim to be concatenated.
+ * @param dim  The dim along which to concatenate the input tensors
+ *
+ * @return Return the concatenated tensor
+ */
+template <typename T = float>
+Ort::Value Cat(OrtAllocator *allocator,
+               const std::vector<const Ort::Value *> &values, int32_t dim);
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_CAT_H_