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