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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2019-09-09 13:26:37 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2019-09-13 20:13:22 +0300
commit7516d410803309b42f45865eac6dec1a157e1976 (patch)
tree270747f4aae5c1e864bc0f076f3ac3b453f0e98e /test/message.cpp
parentb3cdccbff9fb8e4da6eab06f2fe3e1f02aa29939 (diff)
libcamera: device_enumerator_udev: Delay device node lookup
When populating media devices, we look up device nodes for every entity in the media device, regardless of if the entity is present in the orphans list. This causes unnecessary lookups (that may also fail as the device node may not be ready yet at that time). Move the lookup at a later time, when the device node is actually needed. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Diffstat (limited to 'test/message.cpp')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.1 (git 2.18.0) at 2025-02-17 23:23:40 +0000
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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * main_window.cpp - qcam - Main application window
 */

#include <iomanip>
#include <iostream>
#include <string>
#include <sys/mman.h>

#include <QCoreApplication>
#include <QInputDialog>
#include <QTimer>

#include <libcamera/camera_manager.h>
#include <libcamera/version.h>

#include "main_window.h"
#include "viewfinder.h"

using namespace libcamera;

MainWindow::MainWindow(CameraManager *cm, const OptionsParser::Options &options)
	: options_(options), isCapturing_(false)
{
	int ret;

	title_ = "QCam " + QString::fromStdString(CameraManager::version());
	setWindowTitle(title_);
	connect(&titleTimer_, SIGNAL(timeout()), this, SLOT(updateTitle()));

	viewfinder_ = new ViewFinder(this);
	setCentralWidget(viewfinder_);
	viewfinder_->setFixedSize(500, 500);
	adjustSize();

	ret = openCamera(cm);
	if (!ret)
		ret = startCapture();

	if (ret < 0)
		QTimer::singleShot(0, QCoreApplication::instance(),
				   &QCoreApplication::quit);
}

MainWindow::~MainWindow()
{
	if (camera_) {
		stopCapture();
		camera_->release();
		camera_.reset();
	}
}

void MainWindow::updateTitle()
{
	unsigned int duration = frameRateInterval_.elapsed();
	unsigned int frames = framesCaptured_ - previousFrames_;
	double fps = frames * 1000.0 / duration;

	/* Restart counters. */
	frameRateInterval_.start();
	previousFrames_ = framesCaptured_;

	setWindowTitle(title_ + " : " + QString::number(fps, 'f', 2) + " fps");
}

std::string MainWindow::chooseCamera(CameraManager *cm)
{
	QStringList cameras;
	bool result;

	if (cm->cameras().size() == 1)
		return cm->cameras()[0]->name();

	for (const std::shared_ptr<Camera> &cam : cm->cameras())
		cameras.append(QString::fromStdString(cam->name()));

	QString name = QInputDialog::getItem(this, "Select Camera",
					     "Camera:", cameras, 0,
					     false, &result);
	if (!result)
		return std::string();

	return name.toStdString();
}

int MainWindow::openCamera(CameraManager *cm)
{
	std::string cameraName;

	if (options_.isSet(OptCamera))
		cameraName = static_cast<std::string>(options_[OptCamera]);
	else
		cameraName = chooseCamera(cm);

	if (cameraName == "")
		return -EINVAL;

	camera_ = cm->get(cameraName);
	if (!camera_) {
		std::cout << "Camera " << cameraName << " not found"
			  << std::endl;
		return -ENODEV;
	}

	if (camera_->acquire()) {
		std::cout << "Failed to acquire camera" << std::endl;
		camera_.reset();
		return -EBUSY;
	}

	std::cout << "Using camera " << camera_->name() << std::endl;

	camera_->requestCompleted.connect(this, &MainWindow::requestComplete);

	return 0;
}

int MainWindow::startCapture()
{
	int ret;

	config_ = camera_->generateConfiguration({ StreamRole::VideoRecording });

	StreamConfiguration &cfg = config_->at(0);
	if (options_.isSet(OptSize)) {
		const std::vector<OptionValue> &sizeOptions =
			options_[OptSize].toArray();

		/* Set desired stream size if requested. */
		for (const auto &value : sizeOptions) {
			KeyValueParser::Options opt = value.toKeyValues();

			if (opt.isSet("width"))
				cfg.size.width = opt["width"];