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1 /*
2  * Copyright (C) 2016 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 "chre/core/init.h"
18 #include "chre/core/event.h"
19 #include "chre/core/event_loop.h"
20 #include "chre/core/event_loop_manager.h"
21 #include "chre/core/nanoapp.h"
22 #include "chre/core/static_nanoapps.h"
23 #ifdef CHRE_AUDIO_SUPPORT_ENABLED
24 #include "chre/platform/platform_audio.h"
25 #endif  // CHRE_AUDIO_SUPPORT_ENABLED
26 #include "chre/platform/context.h"
27 #include "chre/platform/fatal_error.h"
28 #include "chre/platform/linux/platform_log.h"
29 #include "chre/platform/linux/task_util/task_manager.h"
30 #include "chre/platform/log.h"
31 #include "chre/platform/system_timer.h"
32 #include "chre/util/time.h"
33 
34 #include <tclap/CmdLine.h>
35 #include <csignal>
36 #include <thread>
37 
38 using chre::EventLoopManagerSingleton;
39 using chre::Milliseconds;
40 
41 //! A description of the simulator.
42 constexpr char kSimDescription[] =
43     "A simulation environment for the Context Hub Runtime Environment (CHRE)";
44 
45 //! The version of the simulator. This is not super important but is assigned by
46 //! rules of semantic versioning.
47 constexpr char kSimVersion[] = "0.1.0";
48 
49 namespace {
50 
signalHandler(int sig)51 extern "C" void signalHandler(int sig) {
52   (void)sig;
53   LOGI("Stop request received");
54   EventLoopManagerSingleton::get()->getEventLoop().stop();
55 }
56 
57 }  // namespace
58 
main(int argc,char ** argv)59 int main(int argc, char **argv) {
60   try {
61     // Parse command-line arguments.
62     TCLAP::CmdLine cmd(kSimDescription, ' ', kSimVersion);
63     TCLAP::SwitchArg noStaticNanoappsArg("", "no_static_nanoapps",
64                                          "disable running static nanoapps", cmd,
65                                          false);
66     TCLAP::MultiArg<std::string> nanoappsArg(
67         "", "nanoapp", "nanoapp shared object to load and execute", false,
68         "path", cmd);
69 #ifdef CHRE_AUDIO_SUPPORT_ENABLED
70     TCLAP::ValueArg<std::string> audioFileArg(
71         "", "audio_file", "WAV file to open for audio simulation", false, "",
72         "path", cmd);
73     TCLAP::ValueArg<double> minAudioBufSizeArg(
74         "", "min_audio_buf_size", "min buffer size for audio simulation", false,
75         1.0, "seconds", cmd);
76     TCLAP::ValueArg<double> maxAudioBufSizeArg(
77         "", "max_audio_buf_size", "max buffer size for audio simulation", false,
78         10.0, "seconds", cmd);
79 #endif  // CHRE_AUDIO_SUPPORT_ENABLED
80     cmd.parse(argc, argv);
81 
82     // Initialize logging.
83     chre::PlatformLogSingleton::init();
84 
85 #ifdef CHRE_AUDIO_SUPPORT_ENABLED
86     // Initialize audio sources.
87     if (!audioFileArg.getValue().empty()) {
88       auto audioSource = chre::MakeUnique<chre::AudioSource>(
89           audioFileArg.getValue(), minAudioBufSizeArg.getValue(),
90           maxAudioBufSizeArg.getValue());
91       chre::PlatformAudio::addAudioSource(audioSource);
92     }
93 
94     // TODO(P1-d24c82): Add another command line argument that takes a json
95     // configuration to support multiple sources.
96 #endif  // CHRE_AUDIO_SUPPORT_ENABLED
97 
98     // Initialize the TaskManager.
99     chre::TaskManagerSingleton::init();
100 
101     // Initialize the system.
102     chre::init();
103 
104     // Register a signal handler.
105     std::signal(SIGINT, signalHandler);
106 
107     // Load any static nanoapps and start the event loop.
108     std::thread chreThread([&]() {
109       EventLoopManagerSingleton::get()->lateInit();
110 
111       // Load static nanoapps unless they are disabled by a command-line flag.
112       if (!noStaticNanoappsArg.getValue()) {
113         chre::loadStaticNanoapps();
114       }
115 
116       // Load dynamic nanoapps specified on the command-line.
117       chre::DynamicVector<chre::UniquePtr<chre::Nanoapp>> dynamicNanoapps;
118       for (const auto &nanoapp : nanoappsArg.getValue()) {
119         dynamicNanoapps.push_back(chre::MakeUnique<chre::Nanoapp>());
120         dynamicNanoapps.back()->loadFromFile(nanoapp);
121         EventLoopManagerSingleton::get()->getEventLoop().startNanoapp(
122             dynamicNanoapps.back());
123       }
124 
125       EventLoopManagerSingleton::get()->getEventLoop().run();
126     });
127     chreThread.join();
128 
129     chre::TaskManagerSingleton::deinit();
130     chre::deinit();
131     chre::PlatformLogSingleton::deinit();
132   } catch (TCLAP::ExitException) {
133   }
134 
135   return 0;
136 }
137