/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2020, Umang Jain * * hotplug-cameras.cpp - Test cameraAdded/cameraRemoved signals in CameraManager */ #include #include #include #include #include #include #include #include #include #include #include #include "test.h" using namespace libcamera; using namespace std::chrono_literals; class HotplugTest : public Test { protected: void cameraAddedHandler([[maybe_unused]] std::shared_ptr cam) { cameraAdded_ = true; } void cameraRemovedHandler([[maybe_unused]] std::shared_ptr cam) { cameraRemoved_ = true; } int init() { if (!File::exists("/sys/module/uvcvideo")) { std::cout << "uvcvideo driver is not loaded, skipping" << std::endl; return TestSkip; } if (geteuid() != 0) { std::cout << "This test requires root permissions, skipping" << std::endl; return TestSkip; } cm_ = new CameraManager(); if (cm_->start()) { std::cout << "Failed to start camera manager" << std::endl; return TestFail; } cameraAdded_ = false; cameraRemoved_ = false; cm_->cameraAdded.connect(this, &HotplugTest::cameraAddedHandler); cm_->cameraRemoved.connect(this, &HotplugTest::cameraRemovedHandler); return 0; } int run() { DIR *dir; struct dirent *dirent; std::string uvcDeviceDir; dir = opendir(uvcDriverDir_.c_str()); /* Find a UVC device directory, which we can bind/unbind. */ while ((dirent = readdir(dir)) != nullptr) { if (!File::exists(uvcDriverDir_ + dirent->d_name + "/video4linux")) continue; uvcDeviceDir = dirent->d_name; break; } closedir(dir); /* If no UVC device found, skip the test. */ if (uvcDeviceDir.empty()) return TestSkip; /* Unbind a camera and process events. */ std::ofstream(uvcDriverDir_ + "unbind", std::ios::binary) << uvcDeviceDir; Timer timer; timer.start(1000ms); while (timer.isRunning() && !cameraRemoved_) Thread::current()->eventDispatcher()->processEvents(); if (!cameraRemoved_) { std::cout << "Camera unplug not detected" << std::endl; return TestFail; } /* Bind the camera again and process events. */ std::ofstream(uvcDriverDir_ + "bind", std::ios::binary) << uvcDeviceDir; timer.start(1000ms); while (timer.isRunning() && !cameraAdded_) Thread::current()->eventDispatcher()->processEvents(); if (!cameraAdded_) { std::cout << "Camera plug not detected" << std::endl; return TestFail; } return TestPass; } void cleanup() { cm_->stop(); delete cm_; } private: CameraManager *cm_; static const std::string uvcDriverDir_; bool cameraRemoved_; bool cameraAdded_; }; const std::string HotplugTest::uvcDriverDir_ = "/sys/bus/usb/drivers/uvcvideo/"; TEST_REGISTER(HotplugTest) -86fa7300fa91&id=d15f979ead99fd0b2acc7cbe5bd1375d7c6df706'>plain) 
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