libcamera/vivid.git - libcamera pipeline handler for VIVID

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * main.cpp - cam - The libcamera swiss army knife
 */

#include <atomic>
#include <iomanip>
#include <iostream>
#include <signal.h>
#include <string.h>

#include <libcamera/libcamera.h>
#include <libcamera/property_ids.h>

#include "camera_session.h"
#include "event_loop.h"
#include "main.h"
#include "options.h"
#include "stream_options.h"

using namespace libcamera;

class CamApp
{
public:
	CamApp();

	static CamApp *instance();

	int init(int argc, char **argv);
	void cleanup();

	int exec();
	void quit();

private:
	void cameraAdded(std::shared_ptr<Camera> cam);
	void cameraRemoved(std::shared_ptr<Camera> cam);
	void captureDone();
	int parseOptions(int argc, char *argv[]);
	int run();

	static std::string cameraName(const Camera *camera);

	static CamApp *app_;
	OptionsParser::Options options_;

	std::unique_ptr<CameraManager> cm_;

	std::atomic_uint loopUsers_;
	EventLoop loop_;
};

CamApp *CamApp::app_ = nullptr;

CamApp::CamApp()
	: loopUsers_(0)
{
	CamApp::app_ = this;
}

CamApp *CamApp::instance()
{
	return CamApp::app_;
}

int CamApp::init(int argc, char **argv)
{
	int ret;

	ret = parseOptions(argc, argv);
	if (ret < 0)
		return ret;

	cm_ = std::make_unique<CameraManager>();

	ret = cm_->start();
	if (ret) {
		std::cout << "Failed to start camera manager: "
			  << strerror(-ret) << std::endl;
		return ret;
	}

	return 0;
}

void CamApp::cleanup()
{
	cm_->stop();
}

int CamApp::exec()
{
	int ret;

	ret = run();
	cleanup();

	return ret;
}

void CamApp::quit()
{
	loop_.exit();
}

int CamApp::parseOptions(int argc, char *argv[])
{
	StreamKeyValueParser streamKeyValue;

	OptionsParser parser;
	parser.addOption(OptCamera, OptionString,
			 "Specify which camera to operate on, by id or by index", "camera",
			 ArgumentRequired, "camera", true);
	parser.addOption(OptHelp, OptionNone, "Display this help message",
			 "help");
	parser.addOption(OptInfo, OptionNone,
			 "Display information about stream(s)", "info");
	parser.addOption(OptList, OptionNone, "List all cameras", "list");
	parser.addOption(OptListControls, OptionNone, "List cameras controls",
			 "list-controls");
	parser.addOption(OptListProperties, OptionNone, "List cameras properties",
			 "list-properties");
	parser.addOption(OptMonitor, OptionNone,
			 "Monitor for hotplug and unplug camera events",
			 "monitor");

	/* Sub-options of OptCamera: */
	parser.addOption(OptCapture, OptionInteger,
			 "Capture until interrupted by user or until <count> frames captured",
			 "capture", ArgumentOptional, "count", false,
			 OptCamera);
#ifdef HAVE_KMS
	parser.addOption(OptDisplay, OptionString,
			 "Display viewfinder through DRM/KMS on specified connector",
			 "display", ArgumentOptional, "connector", false,
			 OptCamera);
#endif
	parser.addOption(OptFile, OptionString,
			 "Write captured frames to disk\n"
			 "If the file name ends with a '/', it sets the directory in which\n"
			 "to write files, using the default file name. Otherwise it sets the\n"
			 "full file path and name. The first '#' character in the file name\n"
			 "is expanded to the camera index, stream name and frame sequence number.\n"
			 "The default file name is 'frame-#.bin'.",
			 "file", ArgumentOptional, "filename", false,
			 OptCamera);
	parser.addOption(OptStream, &streamKeyValue,
			 "Set configuration of a camera stream", "stream", true,
			 OptCamera);
	parser.addOption(OptStrictFormats, OptionNone,
			 "Do not allow requested stream format(s) to be adjusted",
			 "strict-formats", ArgumentNone, nullptr, false,
			 OptCamera);
	parser.addOption(OptMetadata, OptionNone,


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