tp-nan commented on issue #325:
URL: https://github.com/apache/tvm-ffi/issues/325#issuecomment-3639956796
I would provide another example: converting a contiguous `cv::Mat` into a
`Tensor` seems to be simple with:
```cpp
struct CPUNDAlloc {
CPUNDAlloc(cv::Mat data) : data_(data) {}
void AllocData(DLTensor* tensor) { tensor->data = data_.data; }
void FreeData(DLTensor* tensor) { std::swap(data_, cv::Mat()); }
cv::Mat data_;
};
inline Tensor mat2tensor(cv::Mat mat) {
DLDataType dtype = ...;
DLDevice device = ...;
assert(mat.isContinuous());
return Tensor::FromNDAlloc(CPUNDAlloc(mat), shape, dtype, device);
}
```
However, non-contiguous `cv::Mat` objects cannot be converted to `Tensor`
using this approach directly.
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