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/*
* Copyright (C) 2023 The Android Open Source Project
*
* 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 "virtualtemp_estimator.h"
#include <android-base/logging.h>
#include <dlfcn.h>
#include <vector>
namespace thermal {
namespace vtestimator {
void VirtualTempEstimator::LoadTFLiteWrapper() {
if (!data_) {
LOG(ERROR) << "data_ is nullptr during LoadTFLiteWrapper";
return;
}
std::unique_lock<std::mutex> lock(data_->tflite_methods.mutex_);
void *mLibHandle = dlopen("/vendor/lib64/libthermal_tflite_wrapper.so", 0);
if (mLibHandle == nullptr) {
LOG(ERROR) << "Could not load libthermal_tflite_wrapper library with error: " << dlerror();
return;
}
data_->tflite_methods.create =
reinterpret_cast<tflitewrapper_create>(dlsym(mLibHandle, "Create"));
if (!data_->tflite_methods.create) {
LOG(ERROR) << "Could not link and cast tflitewrapper_create with error: " << dlerror();
}
data_->tflite_methods.init = reinterpret_cast<tflitewrapper_init>(dlsym(mLibHandle, "Init"));
if (!data_->tflite_methods.init) {
LOG(ERROR) << "Could not link and cast tflitewrapper_init with error: " << dlerror();
}
data_->tflite_methods.invoke =
reinterpret_cast<tflitewrapper_invoke>(dlsym(mLibHandle, "Invoke"));
if (!data_->tflite_methods.invoke) {
LOG(ERROR) << "Could not link and cast tflitewrapper_invoke with error: " << dlerror();
}
data_->tflite_methods.destroy =
reinterpret_cast<tflitewrapper_destroy>(dlsym(mLibHandle, "Destroy"));
if (!data_->tflite_methods.destroy) {
LOG(ERROR) << "Could not link and cast tflitewrapper_destroy with error: " << dlerror();
}
}
VirtualTempEstimator::VirtualTempEstimator(size_t num_input_samples) {
data_ = std::make_unique<VirtualTempEstimatorTFLiteData>(num_input_samples);
LoadTFLiteWrapper();
}
VirtualTempEstimator::~VirtualTempEstimator() {
LOG(INFO) << "VirtualTempEstimator destructor";
}
VtEstimatorStatus VirtualTempEstimator::Initialize(const char *model_path) {
LOG(INFO) << "Initialize VirtualTempEstimator\n";
if (!data_) {
LOG(ERROR) << "data_ is nullptr during Initialize\n";
return kVtEstimatorInitFailed;
}
std::unique_lock<std::mutex> lock(data_->tflite_methods.mutex_);
if (!model_path) {
LOG(ERROR) << "Invalid model_path:" << model_path;
return kVtEstimatorInvalidArgs;
}
if (!data_->input_buffer || !data_->input_buffer_size) {
LOG(ERROR) << "Invalid data_ members " << model_path
<< " input_buffer: " << data_->input_buffer
<< " input_buffer_size: " << data_->input_buffer_size;
return kVtEstimatorInitFailed;
}
if (!data_->tflite_methods.create || !data_->tflite_methods.init ||
!data_->tflite_methods.invoke || !data_->tflite_methods.destroy) {
LOG(ERROR) << "Invalid tflite methods";
return kVtEstimatorInitFailed;
}
data_->tflite_wrapper = data_->tflite_methods.create(kNumInputTensors, kNumOutputTensors);
if (!data_->tflite_wrapper) {
LOG(ERROR) << "Failed to create tflite wrapper";
return kVtEstimatorInitFailed;
}
int ret = data_->tflite_methods.init(data_->tflite_wrapper, model_path);
if (ret) {
LOG(ERROR) << "Failed to Init tflite_wrapper for " << model_path << " (ret: )" << ret
<< ")";
return kVtEstimatorInitFailed;
}
data_->is_initialized = true;
data_->model_path = model_path;
LOG(INFO) << "Successfully initialized VirtualTempEstimator for " << model_path;
return kVtEstimatorOk;
}
VtEstimatorStatus VirtualTempEstimator::Estimate(const std::vector<float> &thermistors,
float *output) {
if (!data_) {
LOG(ERROR) << "data_ is nullptr during Estimate\n";
return kVtEstimatorInitFailed;
}
std::unique_lock<std::mutex> lock(data_->tflite_methods.mutex_);
if (!data_->is_initialized) {
LOG(ERROR) << "data_ not initialized for " << data_->model_path;
return kVtEstimatorInitFailed;
}
if ((thermistors.size() != data_->input_buffer_size) || (!output)) {
LOG(ERROR) << "Invalid args for " << data_->model_path
<< " thermistors.size(): " << thermistors.size()
<< " input_buffer_size: " << data_->input_buffer_size << " output: " << output;
return kVtEstimatorInvalidArgs;
}
// copy input data into input tensors
for (size_t i = 0; i < data_->input_buffer_size; ++i) {
data_->input_buffer[i] = thermistors[i];
}
int ret = data_->tflite_methods.invoke(data_->tflite_wrapper, data_->input_buffer,
data_->input_buffer_size, output, 1);
if (ret) {
LOG(ERROR) << "Failed to Invoke for " << data_->model_path << " (ret: " << ret << ")";
return kVtEstimatorInvokeFailed;
}
return kVtEstimatorOk;
}
} // namespace vtestimator
} // namespace thermal
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