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 ANDROID_ML_NN_COMMON_CPU_OPERATION_UTILS_H 18 #define ANDROID_ML_NN_COMMON_CPU_OPERATION_UTILS_H 19 20 #include "OperationsUtils.h" 21 22 #include "tensorflow/contrib/lite/kernels/internal/types.h" 23 24 namespace android { 25 namespace nn { 26 27 // The implementations in tflite/kernels/internal/ take a Dims<4> object 28 // even if the original tensors were not 4D. convertShapeToDims(const Shape & shape)29inline tflite::Dims<4> convertShapeToDims(const Shape& shape) { 30 nnAssert(shape.dimensions.size() <= 4); 31 tflite::Dims<4> dims; 32 33 // The dimensions are reversed in Dims<4>. 34 for (int i = 0; i < 4; ++i) { 35 int src = static_cast<int>(shape.dimensions.size()) - i - 1; 36 if (src >= 0) { 37 dims.sizes[i] = static_cast<int>(getSizeOfDimension(shape, src)); 38 } else { 39 dims.sizes[i] = 1; 40 } 41 } 42 43 dims.strides[0] = 1; 44 for (int i = 1; i<4; i++) { 45 dims.strides[i] = dims.strides[i-1] * dims.sizes[i-1]; 46 } 47 return dims; 48 } 49 50 } // nn 51 } // android 52 53 #endif // ANDROID_ML_NN_COMMON_CPU_OPERATION_UTILS_H 54