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path: root/test/camera/configuration_default.cpp

Age	Commit message (Collapse)	Author
2020-10-20	test: Omit extra semicolons	Hirokazu Honda
	TEST_REGISTER macro is main function. The end semicolon with the macro is unnecessary. Signed-off-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-08-05	libcamera: pipelines: Use sensor ID as camera name	Niklas Söderlund
	Use the CameraSensor ID as the camera name in pipelines that uses a CameraSensors, this is done in preparation of turning the camera name into an ID. The CameraSensor ID meets the requirements that will be put on camera ID. Before this change example of camera names: * OF based systems ov5695 7-0036 ov2685 7-003c * ACPI based systems ov13858 8-0010 ov5670 10-0036 * VIMC VIMC Sensor B After this change the same cameras are: * OF based systems /base/i2c@ff160000/camera@36 /base/i2c@ff160000/camera@36 * ACPI based systems \_SB_.PCI0.I2C2.CAM0 \_SB_.PCI0.I2C4.CAM1 * VIMC platform/vimc.0 Sensor B Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2019-11-20	test: Extract CameraTest class out of camera tests to libtest	Laurent Pinchart
	Many tests other than the camera/ tests use a camera. To increase code sharing, move the base CameraTest class to the test library. The class becomes a helper that doesn't inherit from Test anymore (to avoid diamond inheritance issues when more such helpers will exist). Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-05-23	libcamera: camera: Add a validation API to the CameraConfiguration class	Laurent Pinchart
	The CameraConfiguration class implements a simple storage of StreamConfiguration with internal validation limited to verifying that the stream configurations are not empty. Extend this mechanism by implementing a smart validate() method backed by pipeline handlers. This new mechanism changes the semantic of the camera configuration. The Camera::generateConfiguration() operation still generates a default configuration based on roles, but now also supports generating empty configurations to be filled by applications. Applications can inspect the configuration, optionally modify it, and validate it. The validation implements "try" semantics and adjusts invalid configurations instead of rejecting them completely. Applications then decide whether to accept the modified configuration, or try again with a different set of parameters. Once the configuration is valid, it is passed to Camera::configure(), and pipeline handlers are guaranteed that the configuration they receive is valid. A reference to the Camera may need to be stored in the CameraConfiguration derived classes in order to access it from their validate() implementation. This must be stored as a std::shared_ptr<> as the CameraConfiguration instances belong to applications. In order to make this possible, make the Camera class inherit from std::shared_from_this<>. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-05-23	libcamera: camera: Return a pointer from generateConfiguration()	Laurent Pinchart
	To prepare for specialising the CameraConfiguration class in pipeline handlers, return a pointer to a camera configuration instead of a reference from Camera::generateConfiguration(). The camera configuration always needs to be allocated from the pipeline handler, and its ownership is passed to the application. For symmetry, change Camera::configure() to take a CameraConfiguration pointer instead of a reference. This aligns with our coding practice of passing parameters that are modified by the callee by pointer. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2019-05-23	libcamera: Use stream roles directly instead of StreamUsage	Laurent Pinchart
	In order to prepare for an API overhall of the camera configuration generation, remove the StreamUsage class and replace its uses by stream roles. The size hints can't be specified anymore, and will be replaced with an API on the StreamConfiguration to negotiate configuration parameters with cameras. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2019-05-23	libcamera: camera: Rename configureStreams() and streamConfiguration()	Laurent Pinchart
	Rename the configureStreams() and streamConfiguration() methods to configure() and generateConfiguration() respectively in order to clarify the API. Both methods deal with CameraConfiguration objects, and are thus not limited to streams, even if a CameraConfiguration currently contains streams only. While at it, remove the qcam MainWindow::configureStreams() method that is declared but never defined or used. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2019-04-30	test: Unify naming of configurations in tests	Laurent Pinchart
	Name all instances of CameraConfiguration "config", and all instances of StreamConfiguration "cfg" accross all tests. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-04-09	libcamera: Switch to CameraConfiguration	Niklas Söderlund
	Implement the camera configuration thru out the library, tests, cam and qcam tools. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-04-05	libcamera: camera: Add support for stream usages	Niklas Söderlund
	Instead of requesting the default configuration for a set of streams where the application has to figure out which streams provided by the camera is best suited for its intended usage, have the library figure this out by using stream usages. The application asks the library for a list of streams and a suggested default configuration for them by supplying a list of stream usages. Once the list is retrieved the application can fine-tune the returned configuration and then try to apply it to the camera. Currently no pipeline handler is prepared to handle stream usages but nor did it make use of the list of Stream IDs which was the previous interface. The main reason for this is that all cameras currently only provide one stream each. This will still be the case but the API will be prepared to expand both pipeline handlers and applications to support streams usages. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-04-04	test: camera: Remove test for bad Stream IDs	Niklas Söderlund
	In preparation of reworking how a default configuration is retrieved from a camera remove test that stream IDs must be valid as the data type passed to Camera::streamConfiguration() will change. This change is in preparation for an invasive change. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2019-04-04	test: camera: Remove streams argument from configurationValid()	Niklas Söderlund
	In preparation of reworking how a default configuration is retrieved from a camera remove the streams and validation using the stream when judging if a camera configuration is valid. This is needed as once stream usage hints are added applications will no longer fetch default configuration based on Stream IDs so using them to verify the returned format is not useful. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2019-03-14	test: camera: Add read default configuration test	Niklas Söderlund
	Add a test to verify reading the default configuration from a camera works. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

generated by cgit v1.2.1 (git 2.18.0) at 2025-02-08 23:44:48 +0000

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * main_window.cpp - qcam - Main application window
 */

#include "main_window.h"

#include <assert.h>
#include <iomanip>
#include <string>

#include <libcamera/camera_manager.h>
#include <libcamera/version.h>

#include <QComboBox>
#include <QCoreApplication>
#include <QFileDialog>
#include <QImage>
#include <QImageWriter>
#include <QInputDialog>
#include <QMutexLocker>
#include <QStandardPaths>
#include <QStringList>
#include <QTimer>
#include <QToolBar>
#include <QToolButton>
#include <QtDebug>

#include "../cam/image.h"
#include "dng_writer.h"
#ifndef QT_NO_OPENGL
#include "viewfinder_gl.h"
#endif
#include "viewfinder_qt.h"

using namespace libcamera;

#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
/*
 * Qt::fixed was introduced in v5.14, and ::fixed deprecated in v5.15. Allow
 * usage of Qt::fixed unconditionally.
 */
namespace Qt {
constexpr auto fixed = ::fixed;
} /* namespace Qt */
#endif

/**
 * \brief Custom QEvent to signal capture completion
 */
class CaptureEvent : public QEvent
{
public:
	CaptureEvent()
		: QEvent(type())
	{
	}

	static Type type()
	{
		static int type = QEvent::registerEventType();
		return static_cast<Type>(type);
	}
};

/**
 * \brief Custom QEvent to signal hotplug or unplug
 */
class HotplugEvent : public QEvent
{
public:
	enum PlugEvent {
		HotPlug,
		HotUnplug
	};

	HotplugEvent(std::shared_ptr<Camera> camera, PlugEvent event)
		: QEvent(type()), camera_(std::move(camera)), plugEvent_(event)
	{
	}

	static Type type()
	{
		static int type = QEvent::registerEventType();
		return static_cast<Type>(type);
	}

	PlugEvent hotplugEvent() const { return plugEvent_; }
	Camera *camera() const { return camera_.get(); }

private:
	std::shared_ptr<Camera> camera_;
	PlugEvent plugEvent_;
};

MainWindow::MainWindow(CameraManager *cm, const OptionsParser::Options &options)
	: saveRaw_(nullptr), options_(options), cm_(cm), allocator_(nullptr),
	  isCapturing_(false), captureRaw_(false)
{
	int ret;

	/*
	 * Initialize the UI: Create the toolbar, set the window title and
	 * create the viewfinder widget.
	 */
	createToolbars();

	title_ = "QCam " + QString::fromStdString(CameraManager::version());
	setWindowTitle(title_);
	connect(&titleTimer_, SIGNAL(timeout()), this, SLOT(updateTitle()));

	/* Renderer type Qt or GLES, select Qt by default. */
	std::string renderType = "qt";
	if (options_.isSet(OptRenderer))
		renderType = options_[OptRenderer].toString();

	if (renderType == "qt") {
		ViewFinderQt *viewfinder = new ViewFinderQt(this);
		connect(viewfinder, &ViewFinderQt::renderComplete,
			this, &MainWindow::queueRequest);
		viewfinder_ = viewfinder;
		setCentralWidget(viewfinder);
#ifndef QT_NO_OPENGL
	} else if (renderType == "gles") {
		ViewFinderGL *viewfinder = new ViewFinderGL(this);
		connect(viewfinder, &ViewFinderGL::renderComplete,
			this, &MainWindow::queueRequest);
		viewfinder_ = viewfinder;
		setCentralWidget(viewfinder);
#endif
	} else {
		qWarning() << "Invalid render type"
			   << QString::fromStdString(renderType);
		quit();
		return;
	}

	adjustSize();

	/* Hotplug/unplug support */
	cm_->cameraAdded.connect(this, &MainWindow::addCamera);
	cm_->cameraRemoved.connect(this, &MainWindow::removeCamera);

	/* Open the camera and start capture. */
	ret = openCamera();
	if (ret < 0) {
		quit();
		return;
	}

	startStopAction_->setChecked(true);
}

MainWindow::~MainWindow()
{
	if (camera_) {
		stopCapture();
		camera_->release();
		camera_.reset();
	}
}

bool MainWindow::event(QEvent *e)
{
	if (e->type() == CaptureEvent::type()) {
		processCapture();
		return true;
	} else if (e->type() == HotplugEvent::type()) {
		processHotplug(static_cast<HotplugEvent *>(e));
		return true;
	}

	return QMainWindow::event(e);
}

int MainWindow::createToolbars()
{
	QAction *action;

	toolbar_ = addToolBar("Main");

	/* Disable right click context menu. */
	toolbar_->setContextMenuPolicy(Qt::PreventContextMenu);

	/* Quit action. */
	action = toolbar_->addAction(QIcon::fromTheme("application-exit",
						      QIcon(":x-circle.svg")),
				     "Quit");
	action->setShortcut(Qt::CTRL | Qt::Key_Q);
	connect(action, &QAction::triggered, this, &MainWindow::quit);

	/* Camera selector. */
	cameraCombo_ = new QComboBox();
	connect(cameraCombo_, QOverload<int>::of(&QComboBox::activated),
		this, &MainWindow::switchCamera);

	for (const std::shared_ptr<Camera> &cam : cm_->cameras())
		cameraCombo_->addItem(QString::fromStdString(cam->id()));

	toolbar_->addWidget(cameraCombo_);

	toolbar_->addSeparator();

	/* Start/Stop action. */
	iconPlay_ = QIcon::fromTheme("media-playback-start",
				     QIcon(":play-circle.svg"));
	iconStop_ = QIcon::fromTheme("media-playback-stop",
				     QIcon(":stop-circle.svg"));

	action = toolbar_->addAction(iconPlay_, "Start Capture");
	action->setCheckable(true);
	action->setShortcut(Qt::Key_Space);
	connect(action, &QAction::toggled, this, &MainWindow::toggleCapture);
	startStopAction_ = action;

	/* Save As... action. */
	action = toolbar_->addAction(QIcon::fromTheme("document-save-as",
						      QIcon(":save.svg")),
				     "Save As...");
	action->setShortcut(QKeySequence::SaveAs);
	connect(action, &QAction::triggered, this, &MainWindow::saveImageAs);

#ifdef HAVE_DNG
	/* Save Raw action. */
	action = toolbar_->addAction(QIcon::fromTheme("camera-photo",
						      QIcon(":aperture.svg")),
				     "Save Raw");
	action->setEnabled(false);
	connect(action, &QAction::triggered, this, &MainWindow::captureRaw);
	saveRaw_ = action;
#endif

	return 0;
}

void MainWindow::quit()
{
	QTimer::singleShot(0, QCoreApplication::instance(),
			   &QCoreApplication::quit);
}

void MainWindow::updateTitle()
{
	/* Calculate the average frame rate over the last period. */
	unsigned int duration = frameRateInterval_.elapsed();
	unsigned int frames = framesCaptured_ - previousFrames_;
	double fps = frames * 1000.0 / duration;

	/* Restart counters. */
	frameRateInterval_.start();
	previousFrames_ = framesCaptured_;

	setWindowTitle(title_ + " : " + QString::number(fps, 'f', 2) + " fps");
}

/* -----------------------------------------------------------------------------
 * Camera Selection
 */

void MainWindow::switchCamera(int index)
{
	/* Get and acquire the new camera. */
	const auto &cameras = cm_->cameras();
	if (static_cast<unsigned int>(index) >= cameras.size())
		return;

	const std::shared_ptr<Camera> &cam = cameras[index];

	if (cam->acquire()) {
		qInfo() << "Failed to acquire camera" << cam->id().c_str();
		return;
	}

	qInfo() << "Switching to camera" << cam->id().c_str();

	/*
	 * Stop the capture session, release the current camera, replace it with
	 * the new camera and start a new capture session.
	 */
	startStopAction_->setChecked(false);

	camera_->release();
	camera_ = cam;

	startStopAction_->setChecked(true);
}

std::string MainWindow::chooseCamera()
{
	QStringList cameras;
	bool result;

	/* If only one camera is available, use it automatically. */
	if (cm_->cameras().size() == 1)
		return cm_->cameras()[0]->id();

	/* Present a dialog box to pick a camera. */
	for (const std::shared_ptr<Camera> &cam : cm_->cameras())
		cameras.append(QString::fromStdString(cam->id()));

	QString id = QInputDialog::getItem(this, "Select Camera",
					   "Camera:", cameras, 0,
					   false, &result);
	if (!result)
		return std::string();

	return id.toStdString();
}

int MainWindow::openCamera()
{
	std::string cameraName;

	/*
	 * Use the camera specified on the command line, if any, or display the
	 * camera selection dialog box otherwise.
	 */
	if (options_.isSet(OptCamera))
		cameraName = static_cast<std::string>(options_[OptCamera]);
	else
		cameraName = chooseCamera();

	if (cameraName == "")
		return -EINVAL;

	/* Get and acquire the camera. */
	camera_ = cm_->get(cameraName);
	if (!camera_) {
		qInfo() << "Camera" << cameraName.c_str() << "not found";
		return -ENODEV;
	}

	if (camera_->acquire()) {
		qInfo() << "Failed to acquire camera";
		camera_.reset();
		return -EBUSY;
	}

	/* Set the combo-box entry with the currently selected Camera. */
	cameraCombo_->setCurrentText(QString::fromStdString(cameraName));

	return 0;
}

/* -----------------------------------------------------------------------------
 * Capture Start & Stop
 */

void MainWindow::toggleCapture(bool start)
{
	if (start) {
		startCapture();
		startStopAction_->setIcon(iconStop_);
		startStopAction_->setText("Stop Capture");
	} else {
		stopCapture();
		startStopAction_->setIcon(iconPlay_);
		startStopAction_->setText("Start Capture");
	}
}

/**
 * \brief Start capture with the current camera
 *
 * This function shall not be called directly, use toggleCapture() instead.
 */
int MainWindow::startCapture()
{
	StreamRoles roles = StreamKeyValueParser::roles(options_[OptStream]);
	int ret;

	/* Verify roles are supported. */
	switch (roles.size()) {
	case 1:
		if (roles[0] != StreamRole::Viewfinder) {
			qWarning() << "Only viewfinder supported for single stream";
			return -EINVAL;
		}
		break;
	case 2:
		if (roles[0] != StreamRole::Viewfinder ||
		    roles[1] != StreamRole::Raw) {
			qWarning() << "Only viewfinder + raw supported for dual streams";
			return -EINVAL;
		}
		break;
	default:
		if (roles.size() != 1) {
			qWarning() << "Unsupported stream configuration";
			return -EINVAL;
		}
		break;
	}

	/* Configure the camera. */
	config_ = camera_->generateConfiguration(roles);
	if (!config_) {
		qWarning() << "Failed to generate configuration from roles";
		return -EINVAL;
	}

	StreamConfiguration &vfConfig = config_->at(0);

	/* Use a format supported by the viewfinder if available. */
	std::vector<PixelFormat> formats = vfConfig.formats().pixelformats();
	for (const PixelFormat &format : viewfinder_->nativeFormats()) {
		auto match = std::find_if(formats.begin(), formats.end(),
					  [&](const PixelFormat &f) {
						  return f == format;
					  });
		if (match != formats.end()) {
			vfConfig.pixelFormat = format;
			break;
		}
	}

	/* Allow user to override configuration. */
	if (StreamKeyValueParser::updateConfiguration(config_.get(),
						      options_[OptStream])) {
		qWarning() << "Failed to update configuration";
		return -EINVAL;
	}

	CameraConfiguration::Status validation = config_->validate();
	if (validation == CameraConfiguration::Invalid) {
		qWarning() << "Failed to create valid camera configuration";
		return -EINVAL;
	}

	if (validation == CameraConfiguration::Adjusted)
		qInfo() << "Stream configuration adjusted to "
			<< vfConfig.toString().c_str();

	ret = camera_->configure(config_.get());
	if (ret < 0) {
		qInfo() << "Failed to configure camera";
		return ret;
	}

	/* Store stream allocation. */
	vfStream_ = config_->at(0).stream();
	if (config_->size() == 2)
		rawStream_ = config_->at(1).stream();
	else
		rawStream_ = nullptr;

	/* Configure the viewfinder. */
	ret = viewfinder_->setFormat(vfConfig.pixelFormat,
				     QSize(vfConfig.size.width, vfConfig.size.height),
				     vfConfig.stride);
	if (ret < 0) {
		qInfo() << "Failed to set viewfinder format";
		return ret;
	}

	adjustSize();

	/* Configure the raw capture button. */
	if (saveRaw_)
		saveRaw_->setEnabled(config_->size() == 2);

	/* Allocate and map buffers. */
	allocator_ = new FrameBufferAllocator(camera_);
	for (StreamConfiguration &config : *config_) {
		Stream *stream = config.stream();

		ret = allocator_->allocate(stream);
		if (ret < 0) {
			qWarning() << "Failed to allocate capture buffers";
			goto error;
		}

		for (const std::unique_ptr<FrameBuffer> &buffer : allocator_->buffers(stream)) {
			/* Map memory buffers and cache the mappings. */
			std::unique_ptr<Image> image =
				Image::fromFrameBuffer(buffer.get(), Image::MapMode::ReadOnly);
			assert(image != nullptr);
			mappedBuffers_[buffer.get()] = std::move(image);

			/* Store buffers on the free list. */
			freeBuffers_[stream].enqueue(buffer.get());
		}
	}

	/* Create requests and fill them with buffers from the viewfinder. */
	while (!freeBuffers_[vfStream_].isEmpty()) {
		FrameBuffer *buffer = freeBuffers_[vfStream_].dequeue();

		std::unique_ptr<Request> request = camera_->createRequest();
		if (!request) {
			qWarning() << "Can't create request";
			ret = -ENOMEM;
			goto error;
		}

		ret = request->addBuffer(vfStream_, buffer);
		if (ret < 0) {
			qWarning() << "Can't set buffer for request";
			goto error;
		}

		requests_.push_back(std::move(request));
	}

	/* Start the title timer and the camera. */
	titleTimer_.start(2000);
	frameRateInterval_.start();
	previousFrames_ = 0;
	framesCaptured_ = 0;
	lastBufferTime_ = 0;

	ret = camera_->start();
	if (ret) {
		qInfo() << "Failed to start capture";
		goto error;
	}

	camera_->requestCompleted.connect(this, &MainWindow::requestComplete);

	/* Queue all requests. */
	for (std::unique_ptr<Request> &request : requests_) {
		ret = camera_->queueRequest(request.get());
		if (ret < 0) {
			qWarning() << "Can't queue request";
			goto error_disconnect;
		}
	}

	isCapturing_ = true;

	return 0;

error_disconnect:
	camera_->requestCompleted.disconnect(this);
	camera_->stop();

error:
	requests_.clear();

	mappedBuffers_.clear();

	freeBuffers_.clear();

	delete allocator_;
	allocator_ = nullptr;

	return ret;
}

/**
 * \brief Stop ongoing capture
 *
 * This function may be called directly when tearing down the MainWindow. Use
 * toggleCapture() instead in all other cases.
 */
void MainWindow::stopCapture()
{
	if (!isCapturing_)
		return;

	viewfinder_->stop();
	if (saveRaw_)
		saveRaw_->setEnabled(false);
	captureRaw_ = false;

	int ret = camera_->stop();
	if (ret)
		qInfo() << "Failed to stop capture";

	camera_->requestCompleted.disconnect(this);

	mappedBuffers_.clear();

	requests_.clear();
	freeQueue_.clear();

	delete allocator_;

	isCapturing_ = false;

	config_.reset();

	/*
	 * A CaptureEvent may have been posted before we stopped the camera,
	 * but not processed yet. Clear the queue of done buffers to avoid
	 * racing with the event handler.
	 */
	freeBuffers_.clear();
	doneQueue_.clear();

	titleTimer_.stop();
	setWindowTitle(title_);
}

/* -----------------------------------------------------------------------------
 * Camera hotplugging support
 */

void MainWindow::processHotplug(HotplugEvent *e)
{
	Camera *camera = e->camera();
	HotplugEvent::PlugEvent event = e->hotplugEvent();

	if (event == HotplugEvent::HotPlug) {
		cameraCombo_->addItem(QString::fromStdString(camera->id()));
	} else if (event == HotplugEvent::HotUnplug) {
		/* Check if the currently-streaming camera is removed. */
		if (camera == camera_.get()) {
			toggleCapture(false);
			camera_->release();
			camera_.reset();
			cameraCombo_->setCurrentIndex(0);
		}

		int camIndex = cameraCombo_->findText(QString::fromStdString(camera->id()));
		cameraCombo_->removeItem(camIndex);
	}
}

void MainWindow::addCamera(std::shared_ptr<Camera> camera)
{
	qInfo() << "Adding new camera:" << camera->id().c_str();
	QCoreApplication::postEvent(this,
				    new HotplugEvent(std::move(camera),
						     HotplugEvent::HotPlug));
}

void MainWindow::removeCamera(std::shared_ptr<Camera> camera)
{
	qInfo() << "Removing camera:" << camera->id().c_str();
	QCoreApplication::postEvent(this,
				    new HotplugEvent(std::move(camera),
						     HotplugEvent::HotUnplug));
}

/* -----------------------------------------------------------------------------
 * Image Save
 */

void MainWindow::saveImageAs()
{
	QImage image = viewfinder_->getCurrentImage();
	QString defaultPath = QStandardPaths::writableLocation(QStandardPaths::PicturesLocation);

	QString filename = QFileDialog::getSaveFileName(this, "Save Image", defaultPath,
							"Image Files (*.png *.jpg *.jpeg)");
	if (filename.isEmpty())
		return;

	QImageWriter writer(filename);
	writer.setQuality(95);
	writer.write(image);
}

void MainWindow::captureRaw()
{
	captureRaw_ = true;
}

void MainWindow::processRaw(FrameBuffer *buffer,
			    [[maybe_unused]] const ControlList &metadata)
{
#ifdef HAVE_DNG
	QString defaultPath = QStandardPaths::writableLocation(QStandardPaths::PicturesLocation);
	QString filename = QFileDialog::getSaveFileName(this, "Save DNG", defaultPath,
							"DNG Files (*.dng)");

	if (!filename.isEmpty()) {
		uint8_t *memory = mappedBuffers_[buffer]->data(0).data();
		DNGWriter::write(filename.toStdString().c_str(), camera_.get(),
				 rawStream_->configuration(), metadata, buffer,
				 memory);
	}
#endif

	{
		QMutexLocker locker(&mutex_);
		freeBuffers_[rawStream_].enqueue(buffer);
	}
}

/* -----------------------------------------------------------------------------
 * Request Completion Handling
 */

void MainWindow::requestComplete(Request *request)
{
	if (request->status() == Request::RequestCancelled)
		return;

	/*
	 * We're running in the libcamera thread context, expensive operations
	 * are not allowed. Add the buffer to the done queue and post a
	 * CaptureEvent for the application thread to handle.
	 */
	{
		QMutexLocker locker(&mutex_);
		doneQueue_.enqueue(request);
	}

	QCoreApplication::postEvent(this, new CaptureEvent);
}

void MainWindow::processCapture()
{
	/*
	 * Retrieve the next buffer from the done queue. The queue may be empty
	 * if stopCapture() has been called while a CaptureEvent was posted but
	 * not processed yet. Return immediately in that case.
	 */
	Request *request;
	{
		QMutexLocker locker(&mutex_);
		if (doneQueue_.isEmpty())
			return;

		request = doneQueue_.dequeue();
	}

	/* Process buffers. */
	if (request->buffers().count(vfStream_))
		processViewfinder(request->buffers().at(vfStream_));

	if (request->buffers().count(rawStream_))
		processRaw(request->buffers().at(rawStream_), request->metadata());

	request->reuse();
	QMutexLocker locker(&mutex_);
	freeQueue_.enqueue(request);
}

void MainWindow::processViewfinder(FrameBuffer *buffer)
{
	framesCaptured_++;

	const FrameMetadata &metadata = buffer->metadata();

	double fps = metadata.timestamp - lastBufferTime_;
	fps = lastBufferTime_ && fps ? 1000000000.0 / fps : 0.0;
	lastBufferTime_ = metadata.timestamp;

	QStringList bytesused;
	for (const FrameMetadata::Plane &plane : metadata.planes())
		bytesused << QString::number(plane.bytesused);

	qDebug().noquote()
		<< QString("seq: %1").arg(metadata.sequence, 6, 10, QLatin1Char('0'))
		<< "bytesused: {" << bytesused.join(", ")
		<< "} timestamp:" << metadata.timestamp
		<< "fps:" << Qt::fixed << qSetRealNumberPrecision(2) << fps;

	/* Render the frame on the viewfinder. */
	viewfinder_->render(buffer, mappedBuffers_[buffer].get());
}

void MainWindow::queueRequest(FrameBuffer *buffer)
{
	Request *request;
	{
		QMutexLocker locker(&mutex_);
		if (freeQueue_.isEmpty())
			return;

		request = freeQueue_.dequeue();
	}

	request->addBuffer(vfStream_, buffer);

	if (captureRaw_) {
		FrameBuffer *rawBuffer = nullptr;

		{
			QMutexLocker locker(&mutex_);
			if (!freeBuffers_[rawStream_].isEmpty())
				rawBuffer = freeBuffers_[rawStream_].dequeue();
		}

		if (rawBuffer) {
			request->addBuffer(rawStream_, rawBuffer);
			captureRaw_ = false;
		} else {
			qWarning() << "No free buffer available for RAW capture";
		}
	}

	camera_->queueRequest(request);
}