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* Fix fileobj I/O undeterministic behavior

Ever since the file-like object support was added in #1158, the test
was occasionally failing in CI. This PR fixes this.

Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/51319



We were going out of our way to accommodate `IValue::to<Tensor>` returning a copy of the inner Tensor. `IValue::toTensor` is capable of returning a reference without copying, so if we use it directly, we can allow kernels that want to take `Tensor &` to do so!
As a bonus, we get reduced build times.
ghstack-source-id: 121378961

Reviewed By: bhosmer

Differential Revision: D26138549

fbshipit-source-id: b0f830527da360c542c815bef2f7e1692615b32a
Co-authored-by: Scott Wolchok <swolchok@fb.com>

This reverts commit 93950302.

Remove duplicate --bits command line parameter. It's producing a warning with sox.

Signed-off-by: Eli Uriegas <eliuriegas@fb.com>

After a9f5e7229 was merged into upstream pytorch the passing of
references within torch c extension functions is no longer allowed. This
just removes the reference and passes by value instead.
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>

Co-authored-by: Vincent QB <vincentqb@users.noreply.github.com>

Co-authored-by: moto <855818+mthrok@users.noreply.github.com>

* Switch to cmake for build
* Hide symbols

modified amplitude_to_DB to clamp per-item when a batch is provided
Co-authored-by: Vincent QB <vincentqb@users.noreply.github.com>

* Distinguish get_encodinginfo for Tensor I/O and save output

* Isolate get_tensor_encodinginfo so as not to use the same helper function