Add transpose (#82)

sherpa-onnx/csrc/transpose.cc

@@ -0,0 +1,41 @@
+// sherpa-onnx/csrc/transpose.cc
+//
+// Copyright (c)  2023  Xiaomi Corporation
+
+#include "sherpa-onnx/csrc/transpose.h"
+
+#include <assert.h>
+
+#include <algorithm>
+#include <vector>
+
+namespace sherpa_onnx {
+
+template <typename T /*=float*/>
+Ort::Value Transpose01(OrtAllocator *allocator, const Ort::Value *v) {
+  std::vector<int64_t> shape = v->GetTensorTypeAndShapeInfo().GetShape();
+  assert(shape.size() == 3);
+
+  std::array<int64_t, 3> ans_shape{shape[1], shape[0], shape[2]};
+  Ort::Value ans = Ort::Value::CreateTensor<float>(allocator, ans_shape.data(),
+                                                   ans_shape.size());
+
+  T *dst = ans.GetTensorMutableData<T>();
+  auto plane_offset = shape[1] * shape[2];
+
+  for (int64_t i = 0; i != ans_shape[0]; ++i) {
+    const T *src = v->GetTensorData<T>() + i * shape[2];
+    for (int64_t k = 0; k != ans_shape[1]; ++k) {
+      std::copy(src, src + shape[2], dst);
+      src += plane_offset;
+      dst += shape[2];
+    }
+  }
+
+  return ans;
+}
+
+template Ort::Value Transpose01<float>(OrtAllocator *allocator,
+                                       const Ort::Value *v);
+
+}  // namespace sherpa_onnx