Add Streaming zipformer (#50)

sherpa-onnx/csrc/unbind.h

@@ -0,0 +1,28 @@
+// sherpa-onnx/csrc/unbind.h
+//
+// Copyright (c)  2023  Xiaomi Corporation
+#ifndef SHERPA_ONNX_CSRC_UNBIND_H_
+#define SHERPA_ONNX_CSRC_UNBIND_H_
+
+#include <vector>
+
+#include "onnxruntime_cxx_api.h"  // NOLINT
+
+namespace sherpa_onnx {
+
+/** It is similar to torch.unbind() but we keep the unbind dim to 1 in
+ * the output
+ *
+ * @param allocator Allocator to allocate space for the returned tensor
+ * @param value  The tensor to unbind
+ * @param dim  The dim along which to unbind the tensor
+ *
+ * @return Return a list of tensors
+ */
+template <typename T = float>
+std::vector<Ort::Value> Unbind(OrtAllocator *allocator, const Ort::Value *value,
+                               int32_t dim);
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_UNBIND_H_