1/* Copyright 2020 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15#ifndef TENSORFLOW_CORE_DATA_COMPRESSION_UTILS_H_
16#define TENSORFLOW_CORE_DATA_COMPRESSION_UTILS_H_
17
18#include "tensorflow/core/common_runtime/dma_helper.h"
19#include "tensorflow/core/data/dataset.pb.h"
20#include "tensorflow/core/platform/status.h"
21
22namespace tensorflow {
23namespace data {
24
25// Compresses the components of `element` into the `CompressedElement` proto.
26//
27// In addition to writing the actual compressed bytes, `Compress` fills
28// out the per-component metadata for the `CompressedElement`.
29//
30// Returns an error if the uncompressed size of the element exceeds 4GB.
31Status CompressElement(const std::vector<Tensor>& element,
32 CompressedElement* out);
33
34// Uncompresses a `CompressedElement` into a vector of tensor components.
35Status UncompressElement(const CompressedElement& compressed,
36 std::vector<Tensor>* out);
37
38} // namespace data
39} // namespace tensorflow
40
41#endif // TENSORFLOW_CORE_DATA_COMPRESSION_UTILS_H_
42