audio: import aidl hal

* hardware/interfaces/audio/aidl/default/ at android-16.0.0_r1.

audio/main.cpp

@@ -0,0 +1,103 @@
+/*
+ * 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 <vector>
+
+#define LOG_TAG "AHAL_Main"
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android/binder_ibinder_platform.h>
+#include <android/binder_manager.h>
+#include <android/binder_process.h>
+
+#include "core-impl/AudioPolicyConfigXmlConverter.h"
+#include "core-impl/ChildInterface.h"
+#include "core-impl/Config.h"
+#include "core-impl/Module.h"
+
+using aidl::android::hardware::audio::core::ChildInterface;
+using aidl::android::hardware::audio::core::Config;
+using aidl::android::hardware::audio::core::Module;
+using aidl::android::hardware::audio::core::internal::AudioPolicyConfigXmlConverter;
+
+namespace {
+
+ChildInterface<Module> createModule(const std::string& name,
+                                    std::unique_ptr<Module::Configuration>&& config) {
+    ChildInterface<Module> result;
+    {
+        auto moduleType = Module::typeFromString(name);
+        if (!moduleType.has_value()) {
+            LOG(ERROR) << __func__ << ": module type \"" << name << "\" is not supported";
+            return result;
+        }
+        auto module = Module::createInstance(*moduleType, std::move(config));
+        if (module == nullptr) return result;
+        result = std::move(module);
+    }
+    const std::string moduleFqn = std::string().append(Module::descriptor).append("/").append(name);
+    binder_status_t status = AServiceManager_addService(result.getBinder(), moduleFqn.c_str());
+    if (status != STATUS_OK) {
+        LOG(ERROR) << __func__ << ": failed to register service for \"" << moduleFqn << "\"";
+        return ChildInterface<Module>();
+    }
+    return result;
+};
+
+}  // namespace
+
+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);
+    ABinderProcess_startThreadPool();
+
+    // Guaranteed log for b/210919187 and logd_integration_test
+    LOG(INFO) << "Init for Audio AIDL HAL";
+
+    AudioPolicyConfigXmlConverter audioPolicyConverter{
+            ::android::audio_get_audio_policy_config_file()};
+
+    // Make the default config service
+    auto config = ndk::SharedRefBase::make<Config>(audioPolicyConverter);
+    const std::string configFqn = std::string().append(Config::descriptor).append("/default");
+    binder_status_t status =
+            AServiceManager_addService(config->asBinder().get(), configFqn.c_str());
+    if (status != STATUS_OK) {
+        LOG(ERROR) << "failed to register service for \"" << configFqn << "\"";
+    }
+
+    // Make modules
+    std::vector<ChildInterface<Module>> moduleInstances;
+    auto configs(audioPolicyConverter.releaseModuleConfigs());
+    for (std::pair<std::string, std::unique_ptr<Module::Configuration>>& configPair : *configs) {
+        std::string name = configPair.first;
+        if (auto instance = createModule(name, std::move(configPair.second)); instance) {
+            moduleInstances.push_back(std::move(instance));
+        }
+    }
+
+    ABinderProcess_joinThreadPool();
+    return EXIT_FAILURE;  // should not reach
+}