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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,
"Print the metadata for completed requests",
"metadata", ArgumentNone, nullptr, false,
OptCamera);
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;
}
void CamApp::cameraAdded(std::shared_ptr<Camera> cam)
{
std::cout << "Camera Added: " << cam->id() << std::endl;
}
void CamApp::cameraRemoved(std::shared_ptr<Camera> cam)
{
std::cout << "Camera Removed: " << cam->id() << std::endl;
}
void CamApp::captureDone()
{
if (--loopUsers_ == 0)
EventLoop::instance()->exit(0);
}
int CamApp::run()
{
int ret;
/* 1. List all cameras. */
if (options_.isSet(OptList)) {
std::cout << "Available cameras:" << std::endl;
unsigned int index = 1;
for (const std::shared_ptr<Camera> &cam : cm_->cameras()) {
std::cout << index << ": " << cameraName(cam.get()) << std::endl;
index++;
}
}
/* 2. Create the camera sessions. */
std::vector<std::unique_ptr<CameraSession>> sessions;
if (options_.isSet(OptCamera)) {
unsigned int index = 0;
for (const OptionValue &camera : options_[OptCamera].toArray()) {
std::unique_ptr<CameraSession> session =
std::make_unique<CameraSession>(cm_.get(),
camera.toString(),
index,
camera.children());
if (!session->isValid()) {
std::cout << "Failed to create camera session" << std::endl;
return -EINVAL;
}
std::cout << "Using camera " << session->camera()->id()
<< " as cam" << index << std::endl;
session->captureDone.connect(this, &CamApp::captureDone);
sessions.push_back(std::move(session));
index++;
}
}
/* 3. Print camera information. */
if (options_.isSet(OptListControls) ||
options_.isSet(OptListProperties) ||
options_.isSet(OptInfo)) {
for (const auto &session : sessions) {
if (options_.isSet(OptListControls))
session->listControls();
if (options_.isSet(OptListProperties))
session->listProperties();
if (options_.isSet(OptInfo))
session->infoConfiguration();
}
}
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