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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* main.cpp - cam-ctl a tool to interact with the library
*/
#include <getopt.h>
#include <iomanip>
#include <iostream>
#include <map>
#include <string.h>
#include <libcamera/libcamera.h>
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
using namespace std;
using namespace libcamera;
enum Option {
OptCamera = 'c',
OptHelp = 'h',
OptList = 'l',
OptLast = 0,
};
struct OptionInfo {
Option id;
const char *name;
const char *arguments;
const char *description;
};
static struct OptionInfo option_info[] = {
{ OptCamera, "camera", "<camera>", "Specify which camera to operate on" },
{ OptHelp, "help", nullptr, "Display this help message" },
{ OptList, "list", nullptr, "List all cameras" },
{ OptLast, nullptr, nullptr, nullptr },
};
std::map<Option, std::string> options;
void usage()
{
struct OptionInfo *info;
cout << "Options:" << endl;
for (info = option_info; info->id != OptLast; info++) {
string arg(info->name);
if (info->arguments)
arg += string(" ") + info->arguments;
cout << " -" << static_cast<char>(info->id) << " --" <<
setw(20) << left << arg << " - " <<
info->description << endl;
}
}
int parseOptions(int argc, char **argv)
{
char short_options[ARRAY_SIZE(option_info) * 2 + 1];
struct option long_options[ARRAY_SIZE(option_info)];
struct OptionInfo *info;
unsigned ids = 0, idl = 0;
memset(short_options, 0, sizeof(short_options));
memset(long_options, 0, sizeof(long_options));
for (info = option_info; info->id != OptLast; info++) {
short_options[ids++] = info->id;
if (info->arguments)
short_options[ids++] = ':';
long_options[idl].name = info->name;
long_options[idl].has_arg =
info->arguments ? required_argument : no_argument;
long_options[idl].flag = 0;
long_options[idl].val = info->id;
idl++;
}
while (true) {
int c = getopt_long(argc, argv, short_options, long_options, nullptr);
if (c == -1)
break;
if (!isalpha(c))
return EXIT_FAILURE;
options[static_cast<Option>(c)] = optarg ? string(optarg) : "";
}
return 0;
}
bool optSet(Option opt)
{
return options.count(opt) != 0;
}
int main(int argc, char **argv)
{
int ret;
ret = parseOptions(argc, argv);
if (ret == EXIT_FAILURE)
return ret;
if (argc == 1 || optSet(OptHelp)) {
usage();
return 0;
}
CameraManager *cm = CameraManager::instance();
ret = cm->start();
if (ret) {
cout << "Failed to start camera manager: " << strerror(-ret) << endl;
return EXIT_FAILURE;
}
if (optSet(OptList)) {
cout << "Available cameras:" << endl;
for (const std::shared_ptr<Camera> &camera : cm->cameras())
cout << "- " << camera->name() << endl;
}
if (optSet(OptCamera)) {
std::shared_ptr<Camera> cam = cm->get(options[OptCamera]);
if (cam) {
cout << "Using camera " << cam->name() << endl;
} else {
cout << "Camera " << options[OptCamera] << " not found" << endl;
}
}
cm->stop();
return 0;
}
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