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/*
* Copyright (C) 2016 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 <string.h>
#include <set>
#define LOG_TAG "DevicesFactoryHalHidl"
//#define LOG_NDEBUG 0
#include <android/hidl/manager/1.0/IServiceManager.h>
#include <android/hidl/manager/1.0/IServiceNotification.h>
#include PATH(android/hardware/audio/FILE_VERSION/IDevice.h)
#include <media/audiohal/hidl/HalDeathHandler.h>
#include <utils/Log.h>
#include "ConversionHelperHidl.h"
#include "DeviceHalHidl.h"
#include "DevicesFactoryHalHidl.h"
using ::android::hardware::audio::CPP_VERSION::IDevice;
using ::android::hardware::audio::CPP_VERSION::Result;
using ::android::hardware::Return;
using ::android::hardware::Void;
using ::android::hidl::manager::V1_0::IServiceManager;
using ::android::hidl::manager::V1_0::IServiceNotification;
namespace android {
namespace CPP_VERSION {
class ServiceNotificationListener : public IServiceNotification {
public:
explicit ServiceNotificationListener(sp<DevicesFactoryHalHidl> factory)
: mFactory(factory) {}
Return<void> onRegistration(const hidl_string& /*fully_qualified_name*/,
const hidl_string& instance_name,
bool /*pre_existing*/) override {
if (static_cast<std::string>(instance_name) == "default") return Void();
sp<DevicesFactoryHalHidl> factory = mFactory.promote();
if (!factory) return Void();
sp<IDevicesFactory> halFactory = IDevicesFactory::getService(instance_name);
if (halFactory) {
factory->addDeviceFactory(halFactory, true /*needToNotify*/);
}
return Void();
}
private:
wp<DevicesFactoryHalHidl> mFactory;
};
DevicesFactoryHalHidl::DevicesFactoryHalHidl(sp<IDevicesFactory> devicesFactory) {
ALOG_ASSERT(devicesFactory != nullptr, "Provided default IDevicesFactory service is NULL");
addDeviceFactory(devicesFactory, false /*needToNotify*/);
}
void DevicesFactoryHalHidl::onFirstRef() {
sp<IServiceManager> sm = IServiceManager::getService();
ALOG_ASSERT(sm != nullptr, "Hardware service manager is not running");
sp<ServiceNotificationListener> listener = new ServiceNotificationListener(this);
Return<bool> result = sm->registerForNotifications(
IDevicesFactory::descriptor, "", listener);
if (result.isOk()) {
ALOGE_IF(!static_cast<bool>(result),
"Hardware service manager refused to register listener");
} else {
ALOGE("Failed to register for hardware service manager notifications: %s",
result.description().c_str());
}
}
#if MAJOR_VERSION == 2
static IDevicesFactory::Device idFromHal(const char *name, status_t* status) {
*status = OK;
if (strcmp(name, AUDIO_HARDWARE_MODULE_ID_PRIMARY) == 0) {
return IDevicesFactory::Device::PRIMARY;
} else if(strcmp(name, AUDIO_HARDWARE_MODULE_ID_A2DP) == 0) {
return IDevicesFactory::Device::A2DP;
} else if(strcmp(name, AUDIO_HARDWARE_MODULE_ID_USB) == 0) {
return IDevicesFactory::Device::USB;
} else if(strcmp(name, AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX) == 0) {
return IDevicesFactory::Device::R_SUBMIX;
} else if(strcmp(name, AUDIO_HARDWARE_MODULE_ID_STUB) == 0) {
return IDevicesFactory::Device::STUB;
}
ALOGE("Invalid device name %s", name);
*status = BAD_VALUE;
return {};
}
#elif MAJOR_VERSION >= 4
static const char* idFromHal(const char *name, status_t* status) {
*status = OK;
return name;
}
#endif
status_t DevicesFactoryHalHidl::openDevice(const char *name, sp<DeviceHalInterface> *device) {
auto factories = copyDeviceFactories();
if (factories.empty()) return NO_INIT;
status_t status;
auto hidlId = idFromHal(name, &status);
if (status != OK) return status;
Result retval = Result::NOT_INITIALIZED;
for (const auto& factory : factories) {
Return<void> ret = factory->openDevice(
hidlId,
[&](Result r, const sp<IDevice>& result) {
retval = r;
if (retval == Result::OK) {
*device = new DeviceHalHidl(result);
}
});
if (!ret.isOk()) return FAILED_TRANSACTION;
switch (retval) {
// Device was found and was initialized successfully.
case Result::OK: return OK;
// Device was found but failed to initalize.
case Result::NOT_INITIALIZED: return NO_INIT;
// Otherwise continue iterating.
default: ;
}
}
ALOGW("The specified device name is not recognized: \"%s\"", name);
return BAD_VALUE;
}
status_t DevicesFactoryHalHidl::getHalPids(std::vector<pid_t> *pids) {
std::set<pid_t> pidsSet;
auto factories = copyDeviceFactories();
for (const auto& factory : factories) {
using ::android::hidl::base::V1_0::DebugInfo;
DebugInfo debugInfo;
auto ret = factory->getDebugInfo([&] (const auto &info) {
debugInfo = info;
});
if (!ret.isOk()) {
return INVALID_OPERATION;
}
if (debugInfo.pid == (int)IServiceManager::PidConstant::NO_PID) {
continue;
}
pidsSet.insert(debugInfo.pid);
}
*pids = {pidsSet.begin(), pidsSet.end()};
return NO_ERROR;
}
status_t DevicesFactoryHalHidl::setCallbackOnce(sp<DevicesFactoryHalCallback> callback) {
ALOG_ASSERT(callback != nullptr);
bool needToCallCallback = false;
{
std::lock_guard<std::mutex> lock(mLock);
if (mCallback.unsafe_get()) return INVALID_OPERATION;
mCallback = callback;
if (mHaveUndeliveredNotifications) {
needToCallCallback = true;
mHaveUndeliveredNotifications = false;
}
}
if (needToCallCallback) {
callback->onNewDevicesAvailable();
}
return NO_ERROR;
}
void DevicesFactoryHalHidl::addDeviceFactory(sp<IDevicesFactory> factory, bool needToNotify) {
// It is assumed that the DevicesFactoryHalInterface instance is owned
// by AudioFlinger and thus have the same lifespan.
factory->linkToDeath(HalDeathHandler::getInstance(), 0 /*cookie*/);
sp<DevicesFactoryHalCallback> callback;
{
std::lock_guard<std::mutex> lock(mLock);
mDeviceFactories.push_back(factory);
if (needToNotify) {
callback = mCallback.promote();
if (!callback) {
mHaveUndeliveredNotifications = true;
}
}
}
if (callback) {
callback->onNewDevicesAvailable();
}
}
std::vector<sp<IDevicesFactory>> DevicesFactoryHalHidl::copyDeviceFactories() {
std::lock_guard<std::mutex> lock(mLock);
return mDeviceFactories;
}
} // namespace CPP_VERSION
} // namespace android
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