audio/aidl/default/main.cpp

/*
 * Copyright (C) 2022 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 <cstdlib>
#include <ctime>
#include <utility>

#include <android-base/logging.h>
#include <android/binder_ibinder_platform.h>
#include <android/binder_manager.h>
#include <android/binder_process.h>

#include "core-impl/Config.h"
#include "core-impl/Module.h"
#include "core-impl/ModuleUsb.h"

using aidl::android::hardware::audio::core::Config;
using aidl::android::hardware::audio::core::Module;
using aidl::android::hardware::audio::core::ModuleUsb;

int main() {
    // Random values are used in the implementation.
    std::srand(std::time(nullptr));

    // This is a debug implementation, always enable debug logging.
    android::base::SetMinimumLogSeverity(::android::base::DEBUG);
    // For more logs, use VERBOSE, however this may hinder performance.
    // android::base::SetMinimumLogSeverity(::android::base::VERBOSE);
    ABinderProcess_setThreadPoolMaxThreadCount(16);

    // Make the default config service
    auto config = ndk::SharedRefBase::make<Config>();
    const std::string configName = std::string() + Config::descriptor + "/default";
    binder_status_t status =
            AServiceManager_addService(config->asBinder().get(), configName.c_str());
    CHECK_EQ(STATUS_OK, status);

    // Make modules
    auto createModule = [](Module::Type type, const std::string& instance) {
        auto module = Module::createInstance(type);
        ndk::SpAIBinder moduleBinder = module->asBinder();
        const std::string moduleName = std::string(Module::descriptor).append("/").append(instance);
        AIBinder_setMinSchedulerPolicy(moduleBinder.get(), SCHED_NORMAL, ANDROID_PRIORITY_AUDIO);
        binder_status_t status = AServiceManager_addService(moduleBinder.get(), moduleName.c_str());
        CHECK_EQ(STATUS_OK, status);
        return std::make_pair(module, moduleBinder);
    };
    auto modules = {createModule(Module::Type::DEFAULT, "default"),
                    createModule(Module::Type::R_SUBMIX, "r_submix"),
                    createModule(Module::Type::USB, "usb")};

    ABinderProcess_joinThreadPool();
    return EXIT_FAILURE;  // should not reach
}