tflite_micro_person_detection_init
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yangqingsheng
240
components/tflite_micro/tensorflow/lite/micro/kernels/add.cc
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240
components/tflite_micro/tensorflow/lite/micro/kernels/add.cc
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/* Copyright 2019 The TensorFlow Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#include "tensorflow/lite/kernels/internal/reference/add.h"
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#include "tensorflow/lite/c/builtin_op_data.h"
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#include "tensorflow/lite/c/common.h"
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#include "tensorflow/lite/kernels/internal/quantization_util.h"
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#include "tensorflow/lite/kernels/internal/reference/integer_ops/add.h"
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#include "tensorflow/lite/kernels/internal/reference/process_broadcast_shapes.h"
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#include "tensorflow/lite/kernels/internal/tensor_ctypes.h"
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#include "tensorflow/lite/kernels/kernel_util.h"
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#include "tensorflow/lite/kernels/op_macros.h"
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#include "tensorflow/lite/micro/kernels/kernel_util.h"
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#include "tensorflow/lite/micro/memory_helpers.h"
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namespace tflite {
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namespace ops {
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namespace micro {
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namespace add {
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constexpr int kInputTensor1 = 0;
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constexpr int kInputTensor2 = 1;
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constexpr int kOutputTensor = 0;
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struct OpData {
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bool requires_broadcast;
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// These fields are used in both the general 8-bit -> 8bit quantized path,
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// and the special 16-bit -> 16bit quantized path
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int input1_shift;
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int input2_shift;
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int32_t output_activation_min;
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int32_t output_activation_max;
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// These fields are used only in the general 8-bit -> 8bit quantized path
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int32_t input1_multiplier;
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int32_t input2_multiplier;
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int32_t output_multiplier;
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int output_shift;
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int left_shift;
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int32_t input1_offset;
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int32_t input2_offset;
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int32_t output_offset;
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// Used only for float evals:
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float output_activation_min_f32;
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float output_activation_max_f32;
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};
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TfLiteStatus CalculateOpData(TfLiteContext* context, TfLiteAddParams* params,
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const TfLiteTensor* input1,
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const TfLiteTensor* input2, TfLiteTensor* output,
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OpData* data) {
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data->requires_broadcast = !HaveSameShapes(input1, input2);
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if (output->type == kTfLiteUInt8 || output->type == kTfLiteInt8) {
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// 8bit -> 8bit general quantized path, with general rescalings
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data->input1_offset = -input1->params.zero_point;
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data->input2_offset = -input2->params.zero_point;
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data->output_offset = output->params.zero_point;
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data->left_shift = 20;
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const double twice_max_input_scale =
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2 * static_cast<double>(
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std::max(input1->params.scale, input2->params.scale));
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const double real_input1_multiplier =
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static_cast<double>(input1->params.scale) / twice_max_input_scale;
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const double real_input2_multiplier =
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static_cast<double>(input2->params.scale) / twice_max_input_scale;
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const double real_output_multiplier =
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twice_max_input_scale /
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((1 << data->left_shift) * static_cast<double>(output->params.scale));
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QuantizeMultiplierSmallerThanOneExp(
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real_input1_multiplier, &data->input1_multiplier, &data->input1_shift);
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QuantizeMultiplierSmallerThanOneExp(
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real_input2_multiplier, &data->input2_multiplier, &data->input2_shift);
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QuantizeMultiplierSmallerThanOneExp(
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real_output_multiplier, &data->output_multiplier, &data->output_shift);
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TF_LITE_ENSURE_STATUS(CalculateActivationRangeQuantized(
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context, params->activation, output, &data->output_activation_min,
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&data->output_activation_max));
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} else if (output->type == kTfLiteFloat32) {
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CalculateActivationRange(params->activation,
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&data->output_activation_min_f32,
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&data->output_activation_max_f32);
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}
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return kTfLiteOk;
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}
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void EvalAdd(TfLiteContext* context, TfLiteNode* node, TfLiteAddParams* params,
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const OpData* data, const TfLiteEvalTensor* input1,
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const TfLiteEvalTensor* input2, TfLiteEvalTensor* output) {
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tflite::ArithmeticParams op_params;
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SetActivationParams(data->output_activation_min_f32,
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data->output_activation_max_f32, &op_params);
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#define TF_LITE_ADD(opname) \
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reference_ops::opname(op_params, tflite::micro::GetTensorShape(input1), \
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tflite::micro::GetTensorData<float>(input1), \
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tflite::micro::GetTensorShape(input2), \
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tflite::micro::GetTensorData<float>(input2), \
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tflite::micro::GetTensorShape(output), \
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tflite::micro::GetTensorData<float>(output))
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if (data->requires_broadcast) {
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TF_LITE_ADD(BroadcastAdd4DSlow);
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} else {
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TF_LITE_ADD(Add);
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}
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#undef TF_LITE_ADD
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}
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TfLiteStatus EvalAddQuantized(TfLiteContext* context, TfLiteNode* node,
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TfLiteAddParams* params, const OpData* data,
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const TfLiteEvalTensor* input1,
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const TfLiteEvalTensor* input2,
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TfLiteEvalTensor* output) {
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if (output->type == kTfLiteUInt8 || output->type == kTfLiteInt8) {
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tflite::ArithmeticParams op_params;
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op_params.left_shift = data->left_shift;
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op_params.input1_offset = data->input1_offset;
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op_params.input1_multiplier = data->input1_multiplier;
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op_params.input1_shift = data->input1_shift;
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op_params.input2_offset = data->input2_offset;
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op_params.input2_multiplier = data->input2_multiplier;
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op_params.input2_shift = data->input2_shift;
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op_params.output_offset = data->output_offset;
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op_params.output_multiplier = data->output_multiplier;
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op_params.output_shift = data->output_shift;
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SetActivationParams(data->output_activation_min,
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data->output_activation_max, &op_params);
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bool need_broadcast = reference_ops::ProcessBroadcastShapes(
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tflite::micro::GetTensorShape(input1),
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tflite::micro::GetTensorShape(input2), &op_params);
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#define TF_LITE_ADD(type, opname, dtype) \
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type::opname(op_params, tflite::micro::GetTensorShape(input1), \
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tflite::micro::GetTensorData<dtype>(input1), \
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tflite::micro::GetTensorShape(input2), \
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tflite::micro::GetTensorData<dtype>(input2), \
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tflite::micro::GetTensorShape(output), \
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tflite::micro::GetTensorData<dtype>(output));
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if (output->type == kTfLiteInt8) {
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if (need_broadcast) {
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TF_LITE_ADD(reference_integer_ops, BroadcastAdd4DSlow, int8_t);
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} else {
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TF_LITE_ADD(reference_integer_ops, Add, int8_t);
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}
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} else {
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if (need_broadcast) {
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TF_LITE_ADD(reference_ops, BroadcastAdd4DSlow, uint8_t);
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} else {
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TF_LITE_ADD(reference_ops, Add, uint8_t);
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}
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}
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#undef TF_LITE_ADD
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}
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return kTfLiteOk;
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}
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void* Init(TfLiteContext* context, const char* buffer, size_t length) {
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TFLITE_DCHECK(context->AllocatePersistentBuffer != nullptr);
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return context->AllocatePersistentBuffer(context, sizeof(OpData));
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}
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TfLiteStatus Prepare(TfLiteContext* context, TfLiteNode* node) {
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TFLITE_DCHECK(node->user_data != nullptr);
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TFLITE_DCHECK(node->builtin_data != nullptr);
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const TfLiteTensor* input1 = GetInput(context, node, kInputTensor1);
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const TfLiteTensor* input2 = GetInput(context, node, kInputTensor2);
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TfLiteTensor* output = GetOutput(context, node, kOutputTensor);
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OpData* data = static_cast<OpData*>(node->user_data);
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auto* params = reinterpret_cast<TfLiteAddParams*>(node->builtin_data);
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TF_LITE_ENSURE_STATUS(
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CalculateOpData(context, params, input1, input2, output, data));
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return kTfLiteOk;
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}
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TfLiteStatus Eval(TfLiteContext* context, TfLiteNode* node) {
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auto* params = reinterpret_cast<TfLiteAddParams*>(node->builtin_data);
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TFLITE_DCHECK(node->user_data != nullptr);
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const OpData* data = static_cast<const OpData*>(node->user_data);
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const TfLiteEvalTensor* input1 =
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tflite::micro::GetEvalInput(context, node, kInputTensor1);
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const TfLiteEvalTensor* input2 =
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tflite::micro::GetEvalInput(context, node, kInputTensor2);
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TfLiteEvalTensor* output =
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tflite::micro::GetEvalOutput(context, node, kOutputTensor);
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if (output->type == kTfLiteFloat32) {
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EvalAdd(context, node, params, data, input1, input2, output);
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} else if (output->type == kTfLiteUInt8 || output->type == kTfLiteInt8) {
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TF_LITE_ENSURE_OK(context, EvalAddQuantized(context, node, params, data,
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input1, input2, output));
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} else {
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TF_LITE_KERNEL_LOG(context, "Type %s (%d) not supported.",
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TfLiteTypeGetName(output->type), output->type);
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return kTfLiteError;
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}
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return kTfLiteOk;
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}
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} // namespace add
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TfLiteRegistration Register_ADD() {
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return {/*init=*/add::Init,
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/*free=*/nullptr,
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/*prepare=*/add::Prepare,
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/*invoke=*/add::Eval,
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/*profiling_string=*/nullptr,
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/*builtin_code=*/0,
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/*custom_name=*/nullptr,
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/*version=*/0};
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}
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} // namespace micro
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} // namespace ops
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} // namespace tflite
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