Implement power policy change listener in AudioControl HAL

Bug: 173719953
Test: manual test
Change-Id: Id773bd2bb1c8becc8f3e9e69e23ed8034dd36937

automotive/audiocontrol/aidl/default/Android.bp

@@ -22,15 +22,18 @@ cc_binary {
     generated_sources: ["audio_policy_configuration_V7_0"],
     header_libs: ["libxsdc-utils"],
     shared_libs: [
+        "android.frameworks.automotive.powerpolicy-ndk_platform",
         "android.hardware.automotive.audiocontrol-ndk_platform",
         "libbase",
         "libbinder_ndk",
-        "liblog",
         "libcutils",
+        "liblog",
+        "libpowerpolicyclient",
         "libxml2",
     ],
     srcs: [
         "AudioControl.cpp",
         "main.cpp",
+        "PowerPolicyClient.cpp",
     ],
 }

automotive/audiocontrol/aidl/default/PowerPolicyClient.cpp

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2020 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 "PowerPolicyClient.h"
+#include "AudioControl.h"
+
+#include <android-base/logging.h>
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace audiocontrol {
+
+namespace aafap = aidl::android::frameworks::automotive::powerpolicy;
+
+using aafap::CarPowerPolicy;
+using aafap::CarPowerPolicyFilter;
+using aafap::PowerComponent;
+using ::android::frameworks::automotive::powerpolicy::hasComponent;
+using ::ndk::ScopedAStatus;
+
+namespace {
+
+constexpr PowerComponent kAudioComponent = PowerComponent::AUDIO;
+
+}  // namespace
+
+PowerPolicyClient::PowerPolicyClient(std::shared_ptr<AudioControl> audioControl)
+    : mAudioControl(audioControl) {}
+
+void PowerPolicyClient::onInitFailed() {
+    LOG(ERROR) << "Initializing power policy client failed";
+}
+
+std::vector<PowerComponent> PowerPolicyClient::getComponentsOfInterest() {
+    std::vector<PowerComponent> components{kAudioComponent};
+    return components;
+}
+
+ScopedAStatus PowerPolicyClient::onPolicyChanged(const CarPowerPolicy& powerPolicy) {
+    if (hasComponent(powerPolicy.enabledComponents, kAudioComponent)) {
+        LOG(DEBUG) << "Power policy: Audio component is enabled";
+        // TODO(b/173719953): Do something when AUDIO is enabled.
+    } else if (hasComponent(powerPolicy.disabledComponents, kAudioComponent)) {
+        LOG(DEBUG) << "Power policy: Audio component is disabled";
+        // TODO(b/173719953): Do something when AUDIO is disabled.
+    }
+    return ScopedAStatus::ok();
+}
+
+}  // namespace audiocontrol
+}  // namespace automotive
+}  // namespace hardware
+}  // namespace android
+}  // namespace aidl

automotive/audiocontrol/aidl/default/PowerPolicyClient.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#ifndef AUTOMOTIVE_AUDIOCONTROL_AIDL_DEFAULT_POWERPOLICYCLIENT_H_
+#define AUTOMOTIVE_AUDIOCONTROL_AIDL_DEFAULT_POWERPOLICYCLIENT_H_
+
+#include "PowerPolicyClientBase.h"
+
+#include <memory>
+
+namespace aidl::android::hardware::automotive::audiocontrol {
+
+class AudioControl;
+
+class PowerPolicyClient
+    : public ::android::frameworks::automotive::powerpolicy::PowerPolicyClientBase {
+  public:
+    explicit PowerPolicyClient(std::shared_ptr<AudioControl> audioControl);
+
+    void onInitFailed();
+    std::vector<::aidl::android::frameworks::automotive::powerpolicy::PowerComponent>
+    getComponentsOfInterest() override;
+    ::ndk::ScopedAStatus onPolicyChanged(
+            const ::aidl::android::frameworks::automotive::powerpolicy::CarPowerPolicy&) override;
+
+  private:
+    std::shared_ptr<AudioControl> mAudioControl;
+};
+
+}  // namespace aidl::android::hardware::automotive::audiocontrol
+
+#endif  // AUTOMOTIVE_AUDIOCONTROL_AIDL_DEFAULT_POWERPOLICYCLIENT_H_

automotive/audiocontrol/aidl/default/main.cpp

@@ -15,22 +15,28 @@
  */
 
 #include "AudioControl.h"
+#include "PowerPolicyClient.h"
 
 #include <android-base/logging.h>
 #include <android/binder_manager.h>
 #include <android/binder_process.h>
 
 using aidl::android::hardware::automotive::audiocontrol::AudioControl;
+using aidl::android::hardware::automotive::audiocontrol::PowerPolicyClient;
 
 int main() {
     ABinderProcess_setThreadPoolMaxThreadCount(0);
-    std::shared_ptr<AudioControl> audioControl = ndk::SharedRefBase::make<AudioControl>();
+    std::shared_ptr<AudioControl> audioControl = ::ndk::SharedRefBase::make<AudioControl>();
 
     const std::string instance = std::string() + AudioControl::descriptor + "/default";
     binder_status_t status =
             AServiceManager_addService(audioControl->asBinder().get(), instance.c_str());
     CHECK(status == STATUS_OK);
 
+    std::shared_ptr<PowerPolicyClient> powerPolicyClient =
+            ::ndk::SharedRefBase::make<PowerPolicyClient>(audioControl);
+    powerPolicyClient->init();
+
     ABinderProcess_joinThreadPool();
     return EXIT_FAILURE;  // should not reach
 }