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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 <iostream>
#include <map>
#include <signal.h>
#include <string.h>
#include <libcamera/libcamera.h>
#include "event_loop.h"
#include "options.h"
using namespace libcamera;
OptionsParser::Options options;
enum {
OptCamera = 'c',
OptFormat = 'f',
OptHelp = 'h',
OptList = 'l',
};
EventLoop *loop;
void signalHandler(int signal)
{
std::cout << "Exiting" << std::endl;
loop->exit();
}
static int parseOptions(int argc, char *argv[])
{
KeyValueParser formatKeyValue;
formatKeyValue.addOption("width", OptionInteger, "Width in pixels",
ArgumentRequired);
formatKeyValue.addOption("height", OptionInteger, "Height in pixels",
ArgumentRequired);
formatKeyValue.addOption("pixelformat", OptionInteger, "Pixel format",
ArgumentRequired);
OptionsParser parser;
parser.addOption(OptCamera, OptionString,
"Specify which camera to operate on", "camera",
ArgumentRequired, "camera");
parser.addOption(OptFormat, &formatKeyValue,
"Set format of the camera's first stream", "format");
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 (argc == 1 || options.isSet(OptHelp)) {
parser.usage();
return 1;
}
return 0;
}
bool configureStreams(Camera *camera, std::vector<Stream *> &streams)
{
KeyValueParser::Options format = options[OptFormat];
if (streams.size() != 1) {
std::cout << "Camera has " << streams.size()
<< " streams, I only know how to work with 1"
<< std::endl;
return false;
}
Stream *id = streams.front();
std::map<Stream *, StreamConfiguration> config =
camera->streamConfiguration(streams);
if (format.isSet("width"))
config[id].width = format["width"];
if (format.isSet("height"))
config[id].height = format["height"];
/* TODO: Translate 4CC string to ID. */
if (format.isSet("pixelformat"))
config[id].pixelFormat = format["pixelformat"];
if (camera->configureStreams(config))
return false;
return true;
}
int main(int argc, char **argv)
{
int ret;
ret = parseOptions(argc, argv);
if (ret < 0)
return EXIT_FAILURE;
CameraManager *cm = CameraManager::instance();
std::shared_ptr<Camera> camera;
std::vector<Stream *> streams;
ret = cm->start();
if (ret) {
std::cout << "Failed to start camera manager: "
<< strerror(-ret) << std::endl;
return EXIT_FAILURE;
}
loop = new EventLoop(cm->eventDispatcher());
struct sigaction sa = {};
sa.sa_handler = &signalHandler;
sigaction(SIGINT, &sa, nullptr);
if (options.isSet(OptList)) {
std::cout << "Available cameras:" << std::endl;
for (const std::shared_ptr<Camera> &cam : cm->cameras())
std::cout << "- " << cam->name() << std::endl;
}
if (options.isSet(OptCamera)) {
camera = cm->get(options[OptCamera]);
if (!camera) {
std::cout << "Camera " << options[OptCamera]
<< " not found" << std::endl;
goto out;
}
streams = camera->streams();
if (camera->acquire()) {
std::cout << "Failed to acquire camera" << std::endl;
goto out;
}
std::cout << "Using camera " << camera->name() << std::endl;
}
if (options.isSet(OptFormat)) {
if (!camera) {
std::cout << "Can't configure stream, no camera selected"
<< std::endl;
goto out_camera;
}
if (!configureStreams(camera.get(), streams)) {
std::cout << "Failed to configure camera" << std::endl;
goto out_camera;
}
}
ret = loop->exec();
out_camera:
if (camera) {
camera->release();
camera.reset();
}
out:
delete loop;
cm->stop();
return ret;
}
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