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authorPaul Elder <paul.elder@ideasonboard.com>2020-10-28 18:53:56 +0900
committerPaul Elder <paul.elder@ideasonboard.com>2020-11-03 11:35:16 +0900
commit00cab9cb5627393193107ca85845ee34725a9ac9 (patch)
tree236ebb27056ae6c5b724ca79ed67b77c1954f93e /LICENSES/GPL-2.0.txt
parent6e77b59055a79a0d32ac96bdef73357c9c084c30 (diff)
Documentation: tracing: Add tracing guide
Add guide for tracepoints, including how to define and use them. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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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 <algorithm>
#include <iomanip>
#include <iostream>
#include <limits.h>
#include <map>
#include <signal.h>
#include <sstream>
#include <string.h>

#include <libcamera/libcamera.h>

#include "buffer_writer.h"
#include "event_loop.h"
#include "options.h"

using namespace libcamera;

OptionsParser::Options options;
std::shared_ptr<Camera> camera;
std::map<Stream *, std::string> streamInfo;
EventLoop *loop;
BufferWriter *writer;

enum {
	OptCamera = 'c',
	OptCapture = 'C',
	OptFile = 'F',
	OptHelp = 'h',
	OptList = 'l',
	OptStream = 's',
};

void signalHandler(int signal)
{
	std::cout << "Exiting" << std::endl;
	loop->exit();
}

static int parseOptions(int argc, char *argv[])
{
	KeyValueParser streamKeyValue;
	streamKeyValue.addOption("role", OptionString,
				 "Role for the stream (viewfinder, video, still)",
				 ArgumentRequired);
	streamKeyValue.addOption("width", OptionInteger, "Width in pixels",
				 ArgumentRequired);
	streamKeyValue.addOption("height", OptionInteger, "Height in pixels",
				 ArgumentRequired);
	streamKeyValue.addOption("pixelformat", OptionInteger, "Pixel format",
				 ArgumentRequired);

	OptionsParser parser;
	parser.addOption(OptCamera, OptionString,
			 "Specify which camera to operate on", "camera",
			 ArgumentRequired, "camera");
	parser.addOption(OptCapture, OptionNone,
			 "Capture until interrupted by user", "capture");
	parser.addOption(OptFile, OptionString,
			 "Write captured frames to disk\n"
			 "The first '#' character in the file name is expanded to the stream name and frame sequence number.\n"
			 "The default file name is 'frame-#.bin'.",
			 "file", ArgumentOptional, "filename");
	parser.addOption(OptStream, &streamKeyValue,
			 "Set configuration of a camera stream", "stream", true);
	parser.addOption(OptHelp, OptionNone, "Display this help message",
			 "help");
	parser.addOption(OptList, OptionNone, "List all cameras", "list");

	options = parser.parse(argc, argv);
	if (!options.valid())
		return -EINVAL;

	if (options.empty() || options.isSet(OptHelp)) {
		parser.usage();
		return options.empty() ? -EINVAL : -EINTR;
	}

	return 0;
}

static int prepareCameraConfig(CameraConfiguration *config)
{
	StreamRoles roles;