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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.
*/
#define LOG_TAG "audiohalservice"
#include <signal.h>
#include <string>
#include <vector>
#include <android/binder_process.h>
#include <binder/ProcessState.h>
#include <cutils/properties.h>
#include <dlfcn.h>
#include <hidl/HidlTransportSupport.h>
#include <hidl/LegacySupport.h>
#include <hwbinder/ProcessState.h>
using namespace android::hardware;
using android::OK;
using InterfacesList = std::vector<std::string>;
#ifdef ARCH_ARM_32
//default h/w binder memsize is 1 MB
#define DEFAULT_HW_BINDER_MEM_SIZE_KB 1024
size_t getHWBinderMmapSize(){
int32_t value = DEFAULT_HW_BINDER_MEM_SIZE_KB;
value = property_get_int32("persist.vendor.audio.hw.binder.size_kbyte", value);
ALOGD("Init hw binder with mem size = %d ", value);
return 1024 * value;
}
#endif
/** Try to register the provided factories in the provided order.
* If any registers successfully, do not register any other and return true.
* If all fail, return false.
*/
template <class Iter>
static bool registerPassthroughServiceImplementations(Iter first, Iter last) {
for (; first != last; ++first) {
if (registerPassthroughServiceImplementation(*first) == OK) {
return true;
}
}
return false;
}
static bool registerExternalServiceImplementation(const std::string& libName,
const std::string& funcName) {
constexpr int dlMode = RTLD_LAZY;
void* handle = nullptr;
dlerror(); // clear
auto libPath = libName + ".so";
handle = dlopen(libPath.c_str(), dlMode);
if (handle == nullptr) {
const char* error = dlerror();
ALOGE("Failed to dlopen %s: %s", libPath.c_str(),
error != nullptr ? error : "unknown error");
return false;
}
binder_status_t (*factoryFunction)();
*(void**)(&factoryFunction) = dlsym(handle, funcName.c_str());
if (!factoryFunction) {
const char* error = dlerror();
ALOGE("Factory function %s not found in libName %s: %s", funcName.c_str(), libPath.c_str(),
error != nullptr ? error : "unknown error");
dlclose(handle);
return false;
}
return ((*factoryFunction)() == STATUS_OK);
}
int main(int /* argc */, char* /* argv */ []) {
signal(SIGPIPE, SIG_IGN);
#ifdef ARCH_ARM_32
android::hardware::ProcessState::initWithMmapSize(getHWBinderMmapSize());
#endif
if (::android::ProcessState::isVndservicemanagerEnabled()) {
::android::ProcessState::initWithDriver("/dev/vndbinder");
::android::ProcessState::self()->startThreadPool();
}
ABinderProcess_setThreadPoolMaxThreadCount(1);
ABinderProcess_startThreadPool();
const int32_t defaultValue = -1;
int32_t value =
property_get_int32("persist.vendor.audio.service.hwbinder.size_kbyte", defaultValue);
if (value != defaultValue) {
ALOGD("Configuring hwbinder with mmap size %d KBytes", value);
ProcessState::initWithMmapSize(static_cast<size_t>(value) * 1024);
}
configureRpcThreadpool(16, true /*callerWillJoin*/);
// Automatic formatting tries to compact the lines, making them less readable
// clang-format off
const std::vector<InterfacesList> mandatoryInterfaces = {
{
"Audio Core API",
"android.hardware.audio@7.1::IDevicesFactory",
"android.hardware.audio@7.0::IDevicesFactory",
"android.hardware.audio@6.0::IDevicesFactory",
"android.hardware.audio@5.0::IDevicesFactory",
"android.hardware.audio@4.0::IDevicesFactory",
},
{
"Audio Effect API",
"android.hardware.audio.effect@7.0::IEffectsFactory",
"android.hardware.audio.effect@6.0::IEffectsFactory",
"android.hardware.audio.effect@5.0::IEffectsFactory",
"android.hardware.audio.effect@4.0::IEffectsFactory",
}
};
const std::vector<InterfacesList> optionalInterfaces = {
{
"Soundtrigger API",
"android.hardware.soundtrigger@2.3::ISoundTriggerHw",
"android.hardware.soundtrigger@2.2::ISoundTriggerHw",
"android.hardware.soundtrigger@2.1::ISoundTriggerHw",
"android.hardware.soundtrigger@2.0::ISoundTriggerHw",
},
{
"Bluetooth Audio API",
"android.hardware.bluetooth.audio@2.2::IBluetoothAudioProvidersFactory",
"android.hardware.bluetooth.audio@2.1::IBluetoothAudioProvidersFactory",
"android.hardware.bluetooth.audio@2.0::IBluetoothAudioProvidersFactory",
},
// remove the old HIDL when Bluetooth Audio Hal V2 has offloading supported
{
"Bluetooth Audio Offload API",
"android.hardware.bluetooth.a2dp@1.0::IBluetoothAudioOffload"
}
};
const std::vector<std::pair<std::string,std::string>> optionalInterfaceSharedLibs = {
{
"android.hardware.bluetooth.audio-impl",
"createIBluetoothAudioProviderFactory",
},
{
"android.hardware.audio.sounddose-vendor-impl",
"createISoundDoseFactory",
},
};
// clang-format on
for (const auto& listIter : mandatoryInterfaces) {
auto iter = listIter.begin();
const std::string& interfaceFamilyName = *iter++;
LOG_ALWAYS_FATAL_IF(!registerPassthroughServiceImplementations(iter, listIter.end()),
"Could not register %s", interfaceFamilyName.c_str());
}
for (const auto& listIter : optionalInterfaces) {
auto iter = listIter.begin();
const std::string& interfaceFamilyName = *iter++;
ALOGW_IF(!registerPassthroughServiceImplementations(iter, listIter.end()),
"Could not register %s", interfaceFamilyName.c_str());
}
for (const auto& interfacePair : optionalInterfaceSharedLibs) {
const std::string& libraryName = interfacePair.first;
const std::string& interfaceLoaderFuncName = interfacePair.second;
if (registerExternalServiceImplementation(libraryName, interfaceLoaderFuncName)) {
ALOGI("%s() from %s success", interfaceLoaderFuncName.c_str(), libraryName.c_str());
} else {
ALOGW("%s() from %s failed", interfaceLoaderFuncName.c_str(), libraryName.c_str());
}
}
joinRpcThreadpool();
}
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