147 lines
4.6 KiB
C++
147 lines
4.6 KiB
C++
/* Copyright 2020 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 <complex>
|
|
|
|
#include "tensorflow/lite/c/common.h"
|
|
#include "tensorflow/lite/kernels/internal/tensor.h"
|
|
#include "tensorflow/lite/kernels/internal/tensor_ctypes.h"
|
|
#include "tensorflow/lite/kernels/kernel_util.h"
|
|
|
|
// TODO(b/165735381): Promote this op to builtin-op when we can add new builtin
|
|
// ops.
|
|
|
|
namespace tflite {
|
|
namespace ops {
|
|
namespace custom {
|
|
namespace complex {
|
|
|
|
static const int kInputTensor = 0;
|
|
static const int kOutputTensor = 0;
|
|
|
|
TfLiteStatus Prepare(TfLiteContext* context, TfLiteNode* node) {
|
|
TF_LITE_ENSURE_EQ(context, NumInputs(node), 1);
|
|
TF_LITE_ENSURE_EQ(context, NumOutputs(node), 1);
|
|
|
|
const TfLiteTensor* input = GetInput(context, node, kInputTensor);
|
|
|
|
TF_LITE_ENSURE(context, input->type == kTfLiteComplex64 ||
|
|
input->type == kTfLiteComplex128);
|
|
|
|
TfLiteTensor* output = GetOutput(context, node, kOutputTensor);
|
|
|
|
if (input->type == kTfLiteComplex64) {
|
|
TF_LITE_ENSURE_EQ(context, output->type, kTfLiteFloat32);
|
|
} else {
|
|
TF_LITE_ENSURE(context, output->type = kTfLiteFloat64);
|
|
}
|
|
|
|
TfLiteIntArray* output_shape = TfLiteIntArrayCopy(input->dims);
|
|
return context->ResizeTensor(context, output, output_shape);
|
|
}
|
|
|
|
template <typename T, typename ExtractF>
|
|
void ExtractData(const TfLiteTensor* input, ExtractF extract_func,
|
|
TfLiteTensor* output) {
|
|
const std::complex<T>* input_data = GetTensorData<std::complex<T>>(input);
|
|
T* output_data = GetTensorData<T>(output);
|
|
const int input_size = NumElements(input);
|
|
for (int i = 0; i < input_size; ++i) {
|
|
*output_data++ = extract_func(*input_data++);
|
|
}
|
|
}
|
|
|
|
TfLiteStatus EvalReal(TfLiteContext* context, TfLiteNode* node) {
|
|
const TfLiteTensor* input = GetInput(context, node, kInputTensor);
|
|
|
|
TfLiteTensor* output = GetOutput(context, node, kOutputTensor);
|
|
|
|
switch (input->type) {
|
|
case kTfLiteComplex64: {
|
|
ExtractData<float>(
|
|
input,
|
|
static_cast<float (*)(const std::complex<float>&)>(std::real<float>),
|
|
output);
|
|
break;
|
|
}
|
|
case kTfLiteComplex128: {
|
|
ExtractData<double>(input,
|
|
static_cast<double (*)(const std::complex<double>&)>(
|
|
std::real<double>),
|
|
output);
|
|
break;
|
|
}
|
|
default: {
|
|
TF_LITE_KERNEL_LOG(context,
|
|
"Unsupported input type, Real op only supports "
|
|
"complex input, but got: ",
|
|
TfLiteTypeGetName(input->type));
|
|
return kTfLiteError;
|
|
}
|
|
}
|
|
|
|
return kTfLiteOk;
|
|
}
|
|
|
|
TfLiteStatus EvalImag(TfLiteContext* context, TfLiteNode* node) {
|
|
const TfLiteTensor* input = GetInput(context, node, kInputTensor);
|
|
|
|
TfLiteTensor* output = GetOutput(context, node, kOutputTensor);
|
|
|
|
switch (input->type) {
|
|
case kTfLiteComplex64: {
|
|
ExtractData<float>(
|
|
input,
|
|
static_cast<float (*)(const std::complex<float>&)>(std::imag<float>),
|
|
output);
|
|
break;
|
|
}
|
|
case kTfLiteComplex128: {
|
|
ExtractData<double>(input,
|
|
static_cast<double (*)(const std::complex<double>&)>(
|
|
std::imag<double>),
|
|
output);
|
|
break;
|
|
}
|
|
default: {
|
|
TF_LITE_KERNEL_LOG(context,
|
|
"Unsupported input type, Imag op only supports "
|
|
"complex input, but got: ",
|
|
TfLiteTypeGetName(input->type));
|
|
return kTfLiteError;
|
|
}
|
|
}
|
|
|
|
return kTfLiteOk;
|
|
}
|
|
|
|
} // namespace complex
|
|
|
|
TfLiteRegistration* Register_REAL() {
|
|
static TfLiteRegistration r = {/*init=*/nullptr, /*free=*/nullptr,
|
|
complex::Prepare, complex::EvalReal};
|
|
return &r;
|
|
}
|
|
|
|
TfLiteRegistration* Register_IMAG() {
|
|
static TfLiteRegistration r = {/*init=*/nullptr, /*free=*/nullptr,
|
|
complex::Prepare, complex::EvalImag};
|
|
return &r;
|
|
}
|
|
|
|
} // namespace custom
|
|
} // namespace ops
|
|
} // namespace tflite
|