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25ade36 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 | /* Copyright 2021 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 "edge-impulse-sdk/tensorflow/lite/kernels/internal/reference/depth_to_space.h"
#include <stdint.h>
#include "edge-impulse-sdk/tensorflow/lite/c/common.h"
#include "edge-impulse-sdk/tensorflow/lite/kernels/internal/types.h"
#include "edge-impulse-sdk/tensorflow/lite/kernels/kernel_util.h"
#include "edge-impulse-sdk/tensorflow/lite/micro/kernels/kernel_util.h"
#include "edge-impulse-sdk/tensorflow/lite/micro/micro_log.h"
namespace tflite {
namespace {
constexpr int kInputTensor = 0;
constexpr int kOutputTensor = 0;
// input/output tensor shape rank associations
constexpr int kBatchRank = 0;
constexpr int kHeightRank = 1;
constexpr int kWidthRank = 2;
constexpr int kDepthRank = 3;
TfLiteStatus CalculateOpData(TfLiteContext* context, TfLiteNode* node) {
auto* params =
reinterpret_cast<TfLiteDepthToSpaceParams*>(node->builtin_data);
TF_LITE_ENSURE_EQ(context, NumInputs(node), 1);
TF_LITE_ENSURE_EQ(context, NumOutputs(node), 1);
MicroContext* micro_context = GetMicroContext(context);
TfLiteTensor* input =
micro_context->AllocateTempInputTensor(node, kInputTensor);
TF_LITE_ENSURE(context, input != nullptr);
TfLiteTensor* output =
micro_context->AllocateTempOutputTensor(node, kOutputTensor);
TF_LITE_ENSURE(context, output != nullptr);
TF_LITE_ENSURE_EQ(context, NumDimensions(input), 4);
auto data_type = output->type;
TF_LITE_ENSURE(context,
data_type == kTfLiteFloat32 || data_type == kTfLiteInt8);
TF_LITE_ENSURE_TYPES_EQ(context, input->type, output->type);
const int block_size = params->block_size;
TF_LITE_ENSURE(context, block_size > 0);
const int input_height = input->dims->data[kHeightRank];
const int input_width = input->dims->data[kWidthRank];
const int input_channels = input->dims->data[kDepthRank];
int output_height = input_height * block_size;
int output_width = input_width * block_size;
int output_channels = input_channels / block_size / block_size;
TF_LITE_ENSURE_EQ(context, input_height, output_height / block_size);
TF_LITE_ENSURE_EQ(context, input_width, output_width / block_size);
TF_LITE_ENSURE_EQ(context, input_channels,
output_channels * block_size * block_size);
// We must update the output tensor dimensions.
// The dims storage is expected to be the same area in memory
// for both TfLiteTensor and TfLiteEvalTensor. This is important
// because TfLiteTensor in the MicroInterpreter is a temporary
// allocation. For the KernelRunner interpreter, TfLiteEvalTensor
// is a temporary allocation. We must therefore relocate the dims
// from the FlatBuffer to the persistant storage arena.
TfLiteEvalTensor* output_eval =
tflite::micro::GetEvalOutput(context, node, kOutputTensor);
TF_LITE_ENSURE_OK(context, tflite::micro::CreateWritableTensorDimsWithCopy(
context, output, output_eval));
output->dims->data[kBatchRank] = input->dims->data[kBatchRank];
output->dims->data[kHeightRank] = output_height;
output->dims->data[kWidthRank] = output_width;
output->dims->data[kDepthRank] = output_channels;
micro_context->DeallocateTempTfLiteTensor(input);
micro_context->DeallocateTempTfLiteTensor(output);
return kTfLiteOk;
}
TfLiteStatus Prepare(TfLiteContext* context, TfLiteNode* node) {
return CalculateOpData(context, node);
}
TfLiteStatus Eval(TfLiteContext* context, TfLiteNode* node) {
auto* params =
reinterpret_cast<TfLiteDepthToSpaceParams*>(node->builtin_data);
const TfLiteEvalTensor* input =
tflite::micro::GetEvalInput(context, node, kInputTensor);
TfLiteEvalTensor* output =
tflite::micro::GetEvalOutput(context, node, kOutputTensor);
tflite::DepthToSpaceParams op_params;
op_params.block_size = static_cast<int32_t>(params->block_size);
switch (input->type) { // Already know in/out types are same.
case kTfLiteFloat32:
reference_ops::DepthToSpace(op_params,
tflite::micro::GetTensorShape(input),
tflite::micro::GetTensorData<float>(input),
tflite::micro::GetTensorShape(output),
tflite::micro::GetTensorData<float>(output));
break;
case kTfLiteInt8:
reference_ops::DepthToSpace(op_params,
tflite::micro::GetTensorShape(input),
tflite::micro::GetTensorData<int8_t>(input),
tflite::micro::GetTensorShape(output),
tflite::micro::GetTensorData<int8_t>(output));
break;
default:
MicroPrintf("DEPTH_TO_SPACE only supports FLOAT32 and INT8, got %s.",
TfLiteTypeGetName(output->type));
return kTfLiteError;
}
return kTfLiteOk;
}
} // namespace
TfLiteRegistration Register_DEPTH_TO_SPACE() {
return tflite::micro::RegisterOp(nullptr, Prepare, Eval);
}
} // namespace tflite
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