thermal/virtualtemp_estimator/virtualtemp_estimator_data.h

/*
 * 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 <cstddef>
#include <mutex>
#include <string>

#pragma once

namespace thermal {
namespace vtestimator {

// Current version only supports single input/output tensors
constexpr int kNumInputTensors = 1;
constexpr int kNumOutputTensors = 1;

typedef void *(*tflitewrapper_create)(int num_input_tensors, int num_output_tensors);
typedef bool (*tflitewrapper_init)(void *handle, const char *model_path);
typedef bool (*tflitewrapper_invoke)(void *handle, float *input_samples, int num_input_samples,
                                     float *output_samples, int num_output_samples);
typedef void (*tflitewrapper_destroy)(void *handle);

struct TFLiteWrapperMethods {
    tflitewrapper_create create;
    tflitewrapper_init init;
    tflitewrapper_invoke invoke;
    tflitewrapper_destroy destroy;
    mutable std::mutex mutex_;
};

struct VirtualTempEstimatorTFLiteData {
    VirtualTempEstimatorTFLiteData(size_t num_input_samples) {
        input_buffer = new float[num_input_samples];
        input_buffer_size = num_input_samples;
        is_initialized = false;
        tflite_wrapper = nullptr;

        tflite_methods.create = nullptr;
        tflite_methods.init = nullptr;
        tflite_methods.invoke = nullptr;
        tflite_methods.destroy = nullptr;
    }

    void *tflite_wrapper;
    float *input_buffer;
    size_t input_buffer_size;
    std::string model_path;
    TFLiteWrapperMethods tflite_methods;
    bool is_initialized;

    ~VirtualTempEstimatorTFLiteData() {
        if (tflite_wrapper && tflite_methods.destroy) {
            tflite_methods.destroy(tflite_wrapper);
        }

        if (input_buffer) {
            delete input_buffer;
        }
    }
};

}  // namespace vtestimator
}  // namespace thermal