1 | /* Copyright 2019 The TensorFlow Authors. All Rights Reserved. |
2 | |
3 | Licensed under the Apache License, Version 2.0 (the "License"); |
4 | you may not use this file except in compliance with the License. |
5 | You may obtain a copy of the License at |
6 | |
7 | http://www.apache.org/licenses/LICENSE-2.0 |
8 | |
9 | Unless required by applicable law or agreed to in writing, software |
10 | distributed under the License is distributed on an "AS IS" BASIS, |
11 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
12 | See the License for the specific language governing permissions and |
13 | limitations under the License. |
14 | ==============================================================================*/ |
15 | #include "tensorflow/lite/c/common.h" |
16 | #include "tensorflow/lite/core/subgraph.h" |
17 | #include "tensorflow/lite/experimental/resource/lookup_interfaces.h" |
18 | #include "tensorflow/lite/kernels/internal/tensor_ctypes.h" |
19 | #include "tensorflow/lite/kernels/kernel_util.h" |
20 | |
21 | namespace tflite { |
22 | namespace ops { |
23 | namespace builtin { |
24 | |
25 | namespace hashtable { |
26 | |
27 | constexpr int kInputResourceIdTensor = 0; |
28 | constexpr int kOutputTensor = 0; |
29 | |
30 | TfLiteStatus PrepareHashtableSize(TfLiteContext* context, TfLiteNode* node) { |
31 | TF_LITE_ENSURE_EQ(context, NumInputs(node), 1); |
32 | TF_LITE_ENSURE_EQ(context, NumOutputs(node), 1); |
33 | |
34 | const TfLiteTensor* input_resource_id_tensor; |
35 | TF_LITE_ENSURE_OK(context, GetInputSafe(context, node, kInputResourceIdTensor, |
36 | &input_resource_id_tensor)); |
37 | TF_LITE_ENSURE_EQ(context, input_resource_id_tensor->type, kTfLiteResource); |
38 | TF_LITE_ENSURE_EQ(context, NumDimensions(input_resource_id_tensor), 1); |
39 | TF_LITE_ENSURE_EQ(context, SizeOfDimension(input_resource_id_tensor, 0), 1); |
40 | |
41 | TfLiteTensor* output_tensor; |
42 | TF_LITE_ENSURE_OK( |
43 | context, GetOutputSafe(context, node, kOutputTensor, &output_tensor)); |
44 | TF_LITE_ENSURE_EQ(context, output_tensor->type, kTfLiteInt64); |
45 | TfLiteIntArray* outputSize = TfLiteIntArrayCreate(1); |
46 | outputSize->data[0] = 1; |
47 | return context->ResizeTensor(context, output_tensor, outputSize); |
48 | } |
49 | |
50 | TfLiteStatus EvalHashtableSize(TfLiteContext* context, TfLiteNode* node) { |
51 | const TfLiteTensor* input_resource_id_tensor; |
52 | TF_LITE_ENSURE_OK(context, GetInputSafe(context, node, kInputResourceIdTensor, |
53 | &input_resource_id_tensor)); |
54 | int resource_id = input_resource_id_tensor->data.i32[0]; |
55 | |
56 | TfLiteTensor* output_tensor; |
57 | TF_LITE_ENSURE_OK( |
58 | context, GetOutputSafe(context, node, kOutputTensor, &output_tensor)); |
59 | auto* output_data = GetTensorData<std::int64_t>(output_tensor); |
60 | |
61 | Subgraph* subgraph = reinterpret_cast<Subgraph*>(context->impl_); |
62 | auto& resources = subgraph->resources(); |
63 | auto* lookup = resource::GetHashtableResource(&resources, resource_id); |
64 | TF_LITE_ENSURE(context, lookup != nullptr); |
65 | |
66 | output_data[0] = lookup->Size(); |
67 | return kTfLiteOk; |
68 | } |
69 | |
70 | } // namespace hashtable |
71 | |
72 | TfLiteRegistration* Register_HASHTABLE_SIZE() { |
73 | static TfLiteRegistration r = {/*init=*/nullptr, |
74 | /*free=*/nullptr, |
75 | hashtable::PrepareHashtableSize, |
76 | hashtable::EvalHashtableSize}; |
77 | return &r; |
78 | } |
79 | |
80 | } // namespace builtin |
81 | } // namespace ops |
82 | } // namespace tflite |
83 | |