chromium/third_party/tflite/src/tensorflow/lite/kernels/sparse_to_dense.cc

/* Copyright 2018 The TensorFlow Authors. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==============================================================================*/
#include <stdint.h>

#include <vector>

#include "tensorflow/lite/core/c/common.h"
#include "tensorflow/lite/kernels/internal/reference/reference_ops.h"
#include "tensorflow/lite/kernels/internal/tensor.h"
#include "tensorflow/lite/kernels/internal/tensor_ctypes.h"
#include "tensorflow/lite/kernels/kernel_util.h"
#include "tensorflow/lite/kernels/op_macros.h"

namespace tflite {
namespace ops {
namespace builtin {
namespace sparse_to_dense {

constexpr int kIndicesTensor = …;
constexpr int kOutputShapeTensor = …;
constexpr int kValueInputTensor = …;
constexpr int kDefaultValueTensor = …;
constexpr int kOutputTensor = …;

constexpr int kMaxDimensions = …;

template <typename T>
TfLiteStatus Resize(TfLiteContext* context, const TfLiteTensor* output_shape,
                    TfLiteTensor* output) { … }

TfLiteStatus CheckDimensionsMatch(TfLiteContext* context,
                                  const TfLiteTensor* indices,
                                  const TfLiteTensor* output_shape,
                                  const TfLiteTensor* values) { … }

// Convert indices into a vector of 4-d vectors.
// TODO(renjieliu): Revisit here to improve the performance, since multiple
// allocations of std::vectors will be quite slow on phones.
template <typename T>
TfLiteStatus GetIndicesVector(TfLiteContext* context,
                              const TfLiteTensor* indices,
                              const int num_indices,
                              std::vector<std::vector<T>>* indices_vector) { … }

TfLiteStatus ResizeOutputShape(TfLiteContext* context,
                               const TfLiteTensor* output_shape,
                               TfLiteTensor* output) { … }

TfLiteStatus Prepare(TfLiteContext* context, TfLiteNode* node) { … }

template <typename T, typename TI>
TfLiteStatus SparseToDenseImpl(TfLiteContext* context, TfLiteNode* node) { … }

template <typename T>
TfLiteStatus EvalForIndexType(TfLiteContext* context, TfLiteNode* node,
                              const TfLiteTensor* indices) { … }

TfLiteStatus Eval(TfLiteContext* context, TfLiteNode* node) { … }

}  // namespace sparse_to_dense

TfLiteRegistration* Register_SPARSE_TO_DENSE() { … }

}  // namespace builtin
}  // namespace ops
}  // namespace tflite