chromium/third_party/tflite/src/tensorflow/lite/kernels/strided_slice.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 "tensorflow/lite/kernels/internal/reference/strided_slice.h"

#include <math.h>
#include <stdint.h>

#include <algorithm>
#include <cmath>
#include <vector>

#include "tensorflow/lite/core/c/builtin_op_data.h"
#include "tensorflow/lite/core/c/common.h"
#include "tensorflow/lite/kernels/internal/compatibility.h"
#include "tensorflow/lite/kernels/internal/strided_slice_logic.h"
#include "tensorflow/lite/kernels/internal/tensor.h"
#include "tensorflow/lite/kernels/internal/tensor_ctypes.h"
#include "tensorflow/lite/kernels/internal/types.h"
#include "tensorflow/lite/kernels/kernel_util.h"

namespace tflite {
namespace ops {
namespace builtin {
namespace strided_slice {

enum KernelType { … };

constexpr int kInputTensor = …;
constexpr int kBeginTensor = …;
constexpr int kEndTensor = …;
constexpr int kStridesTensor = …;
constexpr int kOutputTensor = …;

struct OpData { … };

struct StridedSliceContext { … };

StridedSliceParams BuildStridedSliceParams(StridedSliceContext* op_context,
                                           bool start_and_end_indices) { … }

// Processes the indexing tensors (begin, end and strides) to resize the
// output tensor. This function is callable from both Prepare() and Eval() as
// long as the caller ensures the indexing tensors are present.
TfLiteStatus ResizeOutputTensor(TfLiteContext* context,
                                StridedSliceContext* op_context) { … }

template <KernelType kernel_type>
TfLiteStatus EvalImpl(TfLiteContext* context, TfLiteNode* node) { … }

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

template <KernelType kernel_type>
TfLiteStatus Eval(TfLiteContext* context, TfLiteNode* node) { … }

void* Init(TfLiteContext* context, const char* buffer, size_t length) { … }

void Free(TfLiteContext* context, void* buffer) { … }
}  // namespace strided_slice

TfLiteRegistration* Register_STRIDED_SLICE_REF() { … }

TfLiteRegistration* Register_STRIDED_SLICE() { … }

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