8960ef9715
This test checks the code-paths for camera's hotplugged and unplugged support. It is based on bind/unbind of a UVC device from sysfs. Hence, this test requires root permissions to run and should have at least one already bound UVC device present in the system. Signed-off-by: Umang Jain <email@uajain.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
128 lines
2.8 KiB
C++
128 lines
2.8 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2020, Umang Jain <email@uajain.com>
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*
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* hotplug-cameras.cpp - Test cameraAdded/cameraRemoved signals in CameraManager
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*/
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#include <dirent.h>
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#include <fstream>
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#include <iostream>
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#include <string.h>
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#include <unistd.h>
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#include <libcamera/camera.h>
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#include <libcamera/camera_manager.h>
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#include <libcamera/event_dispatcher.h>
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#include <libcamera/timer.h>
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#include "libcamera/internal/file.h"
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#include "libcamera/internal/thread.h"
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#include "test.h"
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using namespace libcamera;
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class HotplugTest : public Test
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{
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protected:
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void cameraAddedHandler(std::shared_ptr<Camera> cam)
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{
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cameraAdded_ = true;
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}
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void cameraRemovedHandler(std::shared_ptr<Camera> cam)
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{
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cameraRemoved_ = true;
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}
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int init()
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{
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if (!File::exists("/sys/module/uvcvideo")) {
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std::cout << "uvcvideo driver is not loaded, skipping" << std::endl;
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return TestSkip;
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}
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if (geteuid() != 0) {
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std::cout << "This test requires root permissions, skipping" << std::endl;
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return TestSkip;
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}
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cm_ = new CameraManager();
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if (cm_->start()) {
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std::cout << "Failed to start camera manager" << std::endl;
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return TestFail;
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}
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cameraAdded_ = false;
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cameraRemoved_ = false;
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cm_->cameraAdded.connect(this, &HotplugTest::cameraAddedHandler);
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cm_->cameraRemoved.connect(this, &HotplugTest::cameraRemovedHandler);
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return 0;
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}
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int run()
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{
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DIR *dir;
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struct dirent *dirent;
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std::string uvcDeviceDir;
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dir = opendir(uvcDriverDir_.c_str());
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/* Find a UVC device directory, which we can bind/unbind. */
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while ((dirent = readdir(dir)) != nullptr) {
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if (!File::exists(uvcDriverDir_ + dirent->d_name + "/video4linux"))
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continue;
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uvcDeviceDir = dirent->d_name;
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break;
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}
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closedir(dir);
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/* If no UVC device found, skip the test. */
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if (uvcDeviceDir.empty())
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return TestSkip;
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/* Unbind a camera and process events. */
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std::ofstream(uvcDriverDir_ + "unbind", std::ios::binary)
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<< uvcDeviceDir;
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Timer timer;
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timer.start(1000);
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while (timer.isRunning() && !cameraRemoved_)
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Thread::current()->eventDispatcher()->processEvents();
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if (!cameraRemoved_) {
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std::cout << "Camera unplug not detected" << std::endl;
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return TestFail;
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}
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/* Bind the camera again and process events. */
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std::ofstream(uvcDriverDir_ + "bind", std::ios::binary)
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<< uvcDeviceDir;
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timer.start(1000);
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while (timer.isRunning() && !cameraAdded_)
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Thread::current()->eventDispatcher()->processEvents();
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if (!cameraAdded_) {
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std::cout << "Camera plug not detected" << std::endl;
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return TestFail;
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}
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return TestPass;
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}
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void cleanup()
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{
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cm_->stop();
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delete cm_;
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}
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private:
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CameraManager *cm_;
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static const std::string uvcDriverDir_;
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bool cameraRemoved_;
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bool cameraAdded_;
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};
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const std::string HotplugTest::uvcDriverDir_ = "/sys/bus/usb/drivers/uvcvideo/";
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TEST_REGISTER(HotplugTest)
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