1 /* Copyright 2017 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 <memory> 16 #include <string> 17 #include <unordered_map> 18 #include <vector> 19 20 #include "tensorflow/contrib/lite/toco/graph_transformations/graph_transformations.h" 21 #include "tensorflow/contrib/lite/toco/model.h" 22 #include "tensorflow/contrib/lite/toco/tooling_util.h" 23 #include "tensorflow/core/platform/logging.h" 24 25 namespace toco { 26 27 bool ResolveBatchToSpaceNDAttributes::Run(Model* model, std::size_t op_index) { 28 const auto op_it = model->operators.begin() + op_index; 29 if (op_it->get()->type != OperatorType::kBatchToSpaceND) return false; 30 31 auto* op = static_cast<BatchToSpaceNDOperator*>(op_it->get()); 32 33 // The attributes are resolved only when the 3 attributes (block_shape, 34 // before_crops, after_crops) are all constant. 35 if (!op->block_shape.empty()) { 36 return false; 37 } 38 39 CHECK_EQ(op->inputs.size(), 3); 40 if (!IsConstantParameterArray(*model, op->inputs[1]) || 41 !IsConstantParameterArray(*model, op->inputs[2])) 42 return false; 43 44 // Handle crops 45 const auto& crops_array = model->GetArray(op->inputs[2]); 46 if (!crops_array.has_shape()) return false; 47 const std::vector<int>& crops_dims = crops_array.shape().dims(); 48 if (crops_dims.size() != 2) { 49 // Code only handles crops of 2 dimensions. Perhaps another transformation 50 // will delete this op. 51 return false; 52 } 53 std::vector<int> crops_buffer = 54 crops_array.GetBuffer<ArrayDataType::kInt32>().data; 55 for (int i = 0; i < crops_dims[0]; ++i) { 56 op->before_crops.push_back(crops_buffer[i * 2]); 57 op->after_crops.push_back(crops_buffer[i * 2 + 1]); 58 } 59 60 // Handle block_shape 61 const auto& block_shape_array = model->GetArray(op->inputs[1]); 62 if (!block_shape_array.has_shape()) return false; 63 const std::vector<int>& block_shape_dims = block_shape_array.shape().dims(); 64 CHECK_EQ(block_shape_dims.size(), 1); 65 std::vector<int> block_shape_buffer = 66 block_shape_array.GetBuffer<ArrayDataType::kInt32>().data; 67 for (int i = 0; i < block_shape_dims[0]; ++i) { 68 op->block_shape.push_back(block_shape_buffer[i]); 69 } 70 71 return true; 72 } 73 74 } // namespace toco 75
