tflite_micro_person_detection_init

components/tflite_micro/tensorflow/lite/micro/kernels/unpack.cc

@@ -0,0 +1,121 @@
+/* Copyright 2019 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/c/builtin_op_data.h"
+#include "tensorflow/lite/c/common.h"
+#include "tensorflow/lite/kernels/internal/tensor_ctypes.h"
+#include "tensorflow/lite/kernels/kernel_util.h"
+#include "tensorflow/lite/micro/kernels/kernel_util.h"
+
+namespace tflite {
+namespace ops {
+namespace micro {
+namespace unpack {
+namespace {
+
+constexpr int kInputTensor = 0;
+
+template <typename T>
+TfLiteStatus UnpackImpl(TfLiteContext* context, TfLiteNode* node,
+                        const TfLiteEvalTensor* input, int output_count,
+                        int axis) {
+  const TfLiteEvalTensor* output0 =
+      tflite::micro::GetEvalOutput(context, node, 0);
+  const TfLiteIntArray* input_dims = input->dims;
+  const TfLiteIntArray* output_dims = output0->dims;
+  const int dimensions = input_dims->size;
+
+  if (axis < 0) {
+    axis += input->dims->size;
+  }
+
+  TFLITE_DCHECK_LT(axis, dimensions);
+
+  int outer_size = 1;
+  for (int i = 0; i < axis; ++i) {
+    outer_size *= input_dims->data[i];
+  }
+  int copy_size = 1;
+  for (int i = axis + 1; i < dimensions; ++i) {
+    copy_size *= input_dims->data[i];
+  }
+  int output_size = 1;
+  for (int i = 0; i < output_dims->size; ++i) {
+    output_size *= output_dims->data[i];
+  }
+  TFLITE_DCHECK_EQ(output_size, copy_size * outer_size);
+
+  const T* input_data = tflite::micro::GetTensorData<T>(input);
+
+  for (int i = 0; i < output_count; ++i) {
+    TfLiteEvalTensor* t = tflite::micro::GetEvalOutput(context, node, i);
+    T* output_data = tflite::micro::GetTensorData<T>(t);
+    for (int k = 0; k < outer_size; ++k) {
+      T* output_ptr = output_data + copy_size * k;
+      int loc = k * output_count * copy_size + i * copy_size;
+      const T* input_ptr = input_data + loc;
+      for (int j = 0; j < copy_size; ++j) output_ptr[j] = input_ptr[j];
+    }
+  }
+
+  return kTfLiteOk;
+}
+
+TfLiteStatus Eval(TfLiteContext* context, TfLiteNode* node) {
+  TfLiteUnpackParams* data =
+      reinterpret_cast<TfLiteUnpackParams*>(node->builtin_data);
+
+  const TfLiteEvalTensor* input =
+      tflite::micro::GetEvalInput(context, node, kInputTensor);
+
+  switch (input->type) {
+    case kTfLiteFloat32: {
+      return UnpackImpl<float>(context, node, input, data->num, data->axis);
+    }
+    case kTfLiteInt32: {
+      return UnpackImpl<int32_t>(context, node, input, data->num, data->axis);
+    }
+    case kTfLiteUInt8: {
+      return UnpackImpl<uint8_t>(context, node, input, data->num, data->axis);
+    }
+    case kTfLiteInt8: {
+      return UnpackImpl<int8_t>(context, node, input, data->num, data->axis);
+    }
+    default: {
+      TF_LITE_KERNEL_LOG(context, "Type '%s' is not supported by unpack.",
+                         TfLiteTypeGetName(input->type));
+      return kTfLiteError;
+    }
+  }
+
+  return kTfLiteOk;
+}
+}  // namespace
+}  // namespace unpack
+
+TfLiteRegistration Register_UNPACK() {
+  return {/*init=*/nullptr,
+          /*free=*/nullptr,
+          /*prepare=*/nullptr,
+          /*invoke=*/unpack::Eval,
+          /*profiling_string=*/nullptr,
+          /*builtin_code=*/0,
+          /*custom_name=*/nullptr,
+          /*version=*/0};
+}
+
+}  // namespace micro
+}  // namespace ops
+}  // namespace tflite