1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef LIBTEXTCLASSIFIER_QUANTIZATION_H_
18#define LIBTEXTCLASSIFIER_QUANTIZATION_H_
19
20#include "util/base/integral_types.h"
21
22namespace libtextclassifier2 {
23
24// Returns true if the quantization parameters are valid.
25bool CheckQuantizationParams(int bytes_per_embedding, int quantization_bits,
26                             int output_embedding_size);
27
28// Dequantizes embeddings (quantized to 1 to 8 bits) into the floats they
29// represent. The algorithm proceeds by reading 2-byte words from the embedding
30// storage to handle well the cases when the quantized value crosses the byte-
31// boundary.
32bool DequantizeAdd(const float* scales, const uint8* embeddings,
33                   int bytes_per_embedding, int num_sparse_features,
34                   int quantization_bits, int bucket_id, float* dest,
35                   int dest_size);
36
37}  // namespace libtextclassifier2
38
39#endif  // LIBTEXTCLASSIFIER_QUANTIZATION_H_
40