1 /*
2 * Copyright (C) 2022 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <algorithm>
18 #include <map>
19 #include <memory>
20 #include <string>
21
22 #define LOG_TAG "DevicesFactoryHalAidl"
23 //#define LOG_NDEBUG 0
24
25 #include <aidl/android/hardware/audio/core/IModule.h>
26 #include <android/binder_manager.h>
27 #include <binder/IServiceManager.h>
28 #include <media/AidlConversionNdkCpp.h>
29 #include <media/AidlConversionUtil.h>
30 #include <utils/Log.h>
31
32 #include "DeviceHalAidl.h"
33 #include "DevicesFactoryHalAidl.h"
34
35 using aidl::android::aidl_utils::statusTFromBinderStatus;
36 using aidl::android::hardware::audio::core::IConfig;
37 using aidl::android::hardware::audio::core::IModule;
38 using aidl::android::hardware::audio::core::SurroundSoundConfig;
39 using aidl::android::media::audio::common::AudioHalEngineConfig;
40 using aidl::android::media::audio::IHalAdapterVendorExtension;
41 using android::detail::AudioHalVersionInfo;
42
43 namespace android {
44
45 namespace {
46
47 ConversionResult<media::SurroundSoundConfig::SurroundFormatFamily>
ndk2cpp_SurroundSoundConfigFormatFamily(const SurroundSoundConfig::SurroundFormatFamily & ndk)48 ndk2cpp_SurroundSoundConfigFormatFamily(const SurroundSoundConfig::SurroundFormatFamily& ndk) {
49 media::SurroundSoundConfig::SurroundFormatFamily cpp;
50 cpp.primaryFormat = VALUE_OR_RETURN(ndk2cpp_AudioFormatDescription(ndk.primaryFormat));
51 cpp.subFormats = VALUE_OR_RETURN(::aidl::android::convertContainer<std::vector<
52 media::audio::common::AudioFormatDescription>>(ndk.subFormats,
53 ndk2cpp_AudioFormatDescription));
54 return cpp;
55 }
56
57 ConversionResult<media::SurroundSoundConfig>
ndk2cpp_SurroundSoundConfig(const SurroundSoundConfig & ndk)58 ndk2cpp_SurroundSoundConfig(const SurroundSoundConfig& ndk) {
59 media::SurroundSoundConfig cpp;
60 cpp.formatFamilies = VALUE_OR_RETURN(::aidl::android::convertContainer<std::vector<
61 media::SurroundSoundConfig::SurroundFormatFamily>>(ndk.formatFamilies,
62 ndk2cpp_SurroundSoundConfigFormatFamily));
63 return cpp;
64 }
65
66 } // namespace
67
DevicesFactoryHalAidl(std::shared_ptr<IConfig> config)68 DevicesFactoryHalAidl::DevicesFactoryHalAidl(std::shared_ptr<IConfig> config)
69 : mConfig(std::move(config)) {
70 }
71
getDeviceNames(std::vector<std::string> * names)72 status_t DevicesFactoryHalAidl::getDeviceNames(std::vector<std::string> *names) {
73 if (names == nullptr) {
74 return BAD_VALUE;
75 }
76 AServiceManager_forEachDeclaredInstance(IModule::descriptor, static_cast<void*>(names),
77 [](const char* instance, void* context) {
78 if (strcmp(instance, "default") == 0) instance = "primary";
79 static_cast<decltype(names)>(context)->push_back(instance);
80 });
81 std::sort(names->begin(), names->end(), [](const std::string& lhs,
82 const std::string& rhs) {
83 // This order corresponds to the canonical order of modules as specified in
84 // the reference 'audio_policy_configuration_7_0.xml' file.
85 static const std::map<std::string, int> kPriorities{
86 { "primary", 0 }, { "a2dp", 1 }, { "usb", 2 }, { "r_submix", 3 },
87 { "bluetooth", 4 }, { "hearing_aid", 5 }, { "msd", 6 }, { "stub", 7 }
88 };
89 auto lhsIt = kPriorities.find(lhs);
90 auto rhsIt = kPriorities.find(rhs);
91 if (lhsIt != kPriorities.end() && rhsIt != kPriorities.end()) {
92 return lhsIt->second < rhsIt->second;
93 }
94 return lhsIt != kPriorities.end();
95 });
96 return OK;
97 }
98
99 // Opens a device with the specified name. To close the device, it is
100 // necessary to release references to the returned object.
openDevice(const char * name,sp<DeviceHalInterface> * device)101 status_t DevicesFactoryHalAidl::openDevice(const char *name, sp<DeviceHalInterface> *device) {
102 if (name == nullptr || device == nullptr) {
103 return BAD_VALUE;
104 }
105 std::shared_ptr<IModule> service;
106 if (strcmp(name, "primary") == 0) name = "default";
107 auto serviceName = std::string(IModule::descriptor) + "/" + name;
108 service = IModule::fromBinder(
109 ndk::SpAIBinder(AServiceManager_waitForService(serviceName.c_str())));
110 if (service == nullptr) {
111 ALOGE("%s fromBinder %s failed", __func__, serviceName.c_str());
112 return NO_INIT;
113 }
114 *device = sp<DeviceHalAidl>::make(name, service, getVendorExtension());
115 return OK;
116 }
117
getHalPids(std::vector<pid_t> * pids)118 status_t DevicesFactoryHalAidl::getHalPids(std::vector<pid_t> *pids) {
119 if (pids == nullptr) {
120 return BAD_VALUE;
121 }
122 // The functionality for retrieving debug infos of services is not exposed via the NDK.
123 sp<IServiceManager> sm = defaultServiceManager();
124 if (sm == nullptr) {
125 return NO_INIT;
126 }
127 std::set<pid_t> pidsSet;
128 const auto moduleServiceName = std::string(IModule::descriptor) + "/";
129 auto debugInfos = sm->getServiceDebugInfo();
130 for (const auto& info : debugInfos) {
131 if (info.pid > 0 &&
132 info.name.size() > moduleServiceName.size() && // '>' as there must be instance name
133 info.name.substr(0, moduleServiceName.size()) == moduleServiceName) {
134 pidsSet.insert(info.pid);
135 }
136 }
137 *pids = {pidsSet.begin(), pidsSet.end()};
138 return NO_ERROR;
139 }
140
setCallbackOnce(sp<DevicesFactoryHalCallback> callback)141 status_t DevicesFactoryHalAidl::setCallbackOnce(sp<DevicesFactoryHalCallback> callback) {
142 // Dynamic registration of module instances is not supported. The functionality
143 // in the audio server which is related to this callback can be removed together
144 // with HIDL support.
145 ALOG_ASSERT(callback != nullptr);
146 if (callback != nullptr) {
147 callback->onNewDevicesAvailable();
148 }
149 return NO_ERROR;
150 }
151
getHalVersion() const152 AudioHalVersionInfo DevicesFactoryHalAidl::getHalVersion() const {
153 int32_t versionNumber = 0;
154 if (ndk::ScopedAStatus status = mConfig->getInterfaceVersion(&versionNumber); !status.isOk()) {
155 ALOGE("%s getInterfaceVersion failed: %s", __func__, status.getDescription().c_str());
156 }
157 // AIDL does not have minor version, fill 0 for all versions
158 return AudioHalVersionInfo(AudioHalVersionInfo::Type::AIDL, versionNumber);
159 }
160
getSurroundSoundConfig(media::SurroundSoundConfig * config)161 status_t DevicesFactoryHalAidl::getSurroundSoundConfig(media::SurroundSoundConfig *config) {
162 SurroundSoundConfig ndkConfig;
163 RETURN_STATUS_IF_ERROR(statusTFromBinderStatus(mConfig->getSurroundSoundConfig(&ndkConfig)));
164 *config = VALUE_OR_RETURN_STATUS(ndk2cpp_SurroundSoundConfig(ndkConfig));
165 return OK;
166 }
167
getEngineConfig(media::audio::common::AudioHalEngineConfig * config)168 status_t DevicesFactoryHalAidl::getEngineConfig(
169 media::audio::common::AudioHalEngineConfig *config) {
170 AudioHalEngineConfig ndkConfig;
171 RETURN_STATUS_IF_ERROR(statusTFromBinderStatus(mConfig->getEngineConfig(&ndkConfig)));
172 *config = VALUE_OR_RETURN_STATUS(ndk2cpp_AudioHalEngineConfig(ndkConfig));
173 return OK;
174 }
175
getVendorExtension()176 std::shared_ptr<IHalAdapterVendorExtension> DevicesFactoryHalAidl::getVendorExtension() {
177 if (!mVendorExt.has_value()) {
178 auto serviceName = std::string(IHalAdapterVendorExtension::descriptor) + "/default";
179 if (AServiceManager_isDeclared(serviceName.c_str())) {
180 mVendorExt = std::shared_ptr<IHalAdapterVendorExtension>(
181 IHalAdapterVendorExtension::fromBinder(ndk::SpAIBinder(
182 AServiceManager_waitForService(serviceName.c_str()))));
183 } else {
184 mVendorExt = nullptr;
185 }
186 }
187 return mVendorExt.value();
188 }
189
190 // Main entry-point to the shared library.
createIDevicesFactoryImpl()191 extern "C" __attribute__((visibility("default"))) void* createIDevicesFactoryImpl() {
192 auto serviceName = std::string(IConfig::descriptor) + "/default";
193 auto service = IConfig::fromBinder(
194 ndk::SpAIBinder(AServiceManager_waitForService(serviceName.c_str())));
195 if (!service) {
196 ALOGE("%s binder service %s not exist", __func__, serviceName.c_str());
197 return nullptr;
198 }
199 return new DevicesFactoryHalAidl(service);
200 }
201
202 } // namespace android
203