| /* |
| * 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 <stdio.h> |
| |
| #include <hidl/HidlTransportSupport.h> |
| #include <utils/Errors.h> |
| #include <utils/StrongPointer.h> |
| #include <utils/Log.h> |
| |
| #include "android-base/macros.h" // arraysize |
| #include "android-base/logging.h" |
| |
| #include <android/hardware/automotive/evs/1.1/IEvsEnumerator.h> |
| #include <android/hardware/automotive/evs/1.1/IEvsDisplay.h> |
| |
| #include <hwbinder/ProcessState.h> |
| |
| #include "EvsStateControl.h" |
| #include "EvsVehicleListener.h" |
| #include "ConfigManager.h" |
| |
| // libhidl: |
| using android::hardware::configureRpcThreadpool; |
| using android::hardware::joinRpcThreadpool; |
| |
| |
| // Helper to subscribe to VHal notifications |
| static bool subscribeToVHal(sp<IVehicle> pVnet, |
| sp<IVehicleCallback> listener, |
| VehicleProperty propertyId) { |
| assert(pVnet != nullptr); |
| assert(listener != nullptr); |
| |
| // Register for vehicle state change callbacks we care about |
| // Changes in these values are what will trigger a reconfiguration of the EVS pipeline |
| SubscribeOptions optionsData[] = { |
| { |
| .propId = static_cast<int32_t>(propertyId), |
| .flags = SubscribeFlags::EVENTS_FROM_CAR |
| }, |
| }; |
| hidl_vec <SubscribeOptions> options; |
| options.setToExternal(optionsData, arraysize(optionsData)); |
| StatusCode status = pVnet->subscribe(listener, options); |
| if (status != StatusCode::OK) { |
| LOG(WARNING) << "VHAL subscription for property " << static_cast<int32_t>(propertyId) |
| << " failed with code " << static_cast<int32_t>(status); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| |
| // Main entry point |
| int main(int argc, char** argv) |
| { |
| LOG(INFO) << "EVS app starting"; |
| |
| // Set up default behavior, then check for command line options |
| bool useVehicleHal = true; |
| bool printHelp = false; |
| const char* evsServiceName = "default"; |
| int displayId = 1; |
| bool useExternalMemory = false; |
| for (int i=1; i< argc; i++) { |
| if (strcmp(argv[i], "--test") == 0) { |
| useVehicleHal = false; |
| } else if (strcmp(argv[i], "--hw") == 0) { |
| evsServiceName = "EvsEnumeratorHw"; |
| } else if (strcmp(argv[i], "--mock") == 0) { |
| evsServiceName = "EvsEnumeratorHw-Mock"; |
| } else if (strcmp(argv[i], "--help") == 0) { |
| printHelp = true; |
| } else if (strcmp(argv[i], "--display") == 0) { |
| displayId = std::stoi(argv[++i]); |
| } else if (strcmp(argv[i], "--extmem") == 0) { |
| useExternalMemory = true; |
| } else { |
| printf("Ignoring unrecognized command line arg '%s'\n", argv[i]); |
| printHelp = true; |
| } |
| } |
| if (printHelp) { |
| printf("Options include:\n"); |
| printf(" --test Do not talk to Vehicle Hal, but simulate 'reverse' instead\n"); |
| printf(" --hw Bypass EvsManager by connecting directly to EvsEnumeratorHw\n"); |
| printf(" --mock Connect directly to EvsEnumeratorHw-Mock\n"); |
| printf(" --display Specify the display to use\n"); |
| printf(" --extmem Application allocates buffers to capture camera frames\n"); |
| } |
| |
| // Load our configuration information |
| ConfigManager config; |
| if (!config.initialize("/system/etc/automotive/evs/config.json")) { |
| LOG(ERROR) << "Missing or improper configuration for the EVS application. Exiting."; |
| return 1; |
| } |
| |
| // Set thread pool size to one to avoid concurrent events from the HAL. |
| // This pool will handle the EvsCameraStream callbacks. |
| // Note: This _will_ run in parallel with the EvsListener run() loop below which |
| // runs the application logic that reacts to the async events. |
| configureRpcThreadpool(1, false /* callerWillJoin */); |
| |
| // Construct our async helper object |
| sp<EvsVehicleListener> pEvsListener = new EvsVehicleListener(); |
| |
| // Get the EVS manager service |
| LOG(INFO) << "Acquiring EVS Enumerator"; |
| android::sp<IEvsEnumerator> pEvs = IEvsEnumerator::getService(evsServiceName); |
| if (pEvs.get() == nullptr) { |
| LOG(ERROR) << "getService(" << evsServiceName |
| << ") returned NULL. Exiting."; |
| return 1; |
| } |
| |
| // Request exclusive access to the EVS display |
| LOG(INFO) << "Acquiring EVS Display"; |
| |
| // We'll use an available display device. |
| android::sp<IEvsDisplay> pDisplay = pEvs->openDisplay_1_1(displayId); |
| if (pDisplay.get() == nullptr) { |
| LOG(ERROR) << "EVS Display unavailable. Exiting."; |
| return 1; |
| } |
| config.setActiveDisplayId(displayId); |
| config.useExternalMemory(useExternalMemory); |
| |
| // Connect to the Vehicle HAL so we can monitor state |
| sp<IVehicle> pVnet; |
| if (useVehicleHal) { |
| LOG(INFO) << "Connecting to Vehicle HAL"; |
| pVnet = IVehicle::getService(); |
| if (pVnet.get() == nullptr) { |
| LOG(ERROR) << "Vehicle HAL getService returned NULL. Exiting."; |
| return 1; |
| } else { |
| // Register for vehicle state change callbacks we care about |
| // Changes in these values are what will trigger a reconfiguration of the EVS pipeline |
| if (!subscribeToVHal(pVnet, pEvsListener, VehicleProperty::GEAR_SELECTION)) { |
| LOG(ERROR) << "Without gear notification, we can't support EVS. Exiting."; |
| return 1; |
| } |
| if (!subscribeToVHal(pVnet, pEvsListener, VehicleProperty::TURN_SIGNAL_STATE)) { |
| LOG(WARNING) << "Didn't get turn signal notifications, so we'll ignore those."; |
| } |
| } |
| } else { |
| LOG(WARNING) << "Test mode selected, so not talking to Vehicle HAL"; |
| } |
| |
| // Configure ourselves for the current vehicle state at startup |
| LOG(INFO) << "Constructing state controller"; |
| EvsStateControl *pStateController = new EvsStateControl(pVnet, pEvs, pDisplay, config); |
| if (!pStateController->startUpdateLoop()) { |
| LOG(ERROR) << "Initial configuration failed. Exiting."; |
| return 1; |
| } |
| |
| // Run forever, reacting to events as necessary |
| LOG(INFO) << "Entering running state"; |
| pEvsListener->run(pStateController); |
| |
| // In normal operation, we expect to run forever, but in some error conditions we'll quit. |
| // One known example is if another process preempts our registration for our service name. |
| LOG(ERROR) << "EVS Listener stopped. Exiting."; |
| |
| return 0; |
| } |