/* 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 <iomanip>
#include <string>
#include <sys/mman.h>

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

#include <libcamera/camera_manager.h>
#include <libcamera/version.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));
	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. */
			const FrameBuffer::Plane &plane = buffer->planes().front();
			void *memory = mmap(NULL, plane.length, PROT_READ, MAP_SHARED,
					    plane.fd.fd(), 0);
			mappedBuffers_[buffer.get()] = { memory, plane.length };

			/* 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, &MainWindow::requestComplete);
	camera_->stop();

error:
	requests_.clear();

	for (auto &iter : mappedBuffers_) {
		const MappedBuffer &buffer = iter.second;
		munmap(buffer.memory, buffer.size);
	}
	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, &MainWindow::requestComplete);

	for (auto &iter : mappedBuffers_) {
		const MappedBuffer &buffer = iter.second;
		munmap(buffer.memory, buffer.size);
	}
	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()) {
		const MappedBuffer &mapped = mappedBuffers_[buffer];
		DNGWriter::write(filename.toStdString().c_str(), camera_.get(),
				 rawStream_->configuration(), metadata, buffer,
				 mapped.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;

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

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

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);
}
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<a id='n496' href='#n496'>496</a>
<a id='n497' href='#n497'>497</a>
<a id='n498' href='#n498'>498</a>
<a id='n499' href='#n499'>499</a>
<a id='n500' href='#n500'>500</a>
<a id='n501' href='#n501'>501</a>
<a id='n502' href='#n502'>502</a>
<a id='n503' href='#n503'>503</a>
<a id='n504' href='#n504'>504</a>
<a id='n505' href='#n505'>505</a>
<a id='n506' href='#n506'>506</a>
<a id='n507' href='#n507'>507</a>
<a id='n508' href='#n508'>508</a>
<a id='n509' href='#n509'>509</a>
<a id='n510' href='#n510'>510</a>
<a id='n511' href='#n511'>511</a>
<a id='n512' href='#n512'>512</a>
<a id='n513' href='#n513'>513</a>
<a id='n514' href='#n514'>514</a>
<a id='n515' href='#n515'>515</a>
<a id='n516' href='#n516'>516</a>
<a id='n517' href='#n517'>517</a>
<a id='n518' href='#n518'>518</a>
<a id='n519' href='#n519'>519</a>
<a id='n520' href='#n520'>520</a>
<a id='n521' href='#n521'>521</a>
<a id='n522' href='#n522'>522</a>
<a id='n523' href='#n523'>523</a>
<a id='n524' href='#n524'>524</a>
<a id='n525' href='#n525'>525</a>
<a id='n526' href='#n526'>526</a>
<a id='n527' href='#n527'>527</a>
<a id='n528' href='#n528'>528</a>
<a id='n529' href='#n529'>529</a>
<a id='n530' href='#n530'>530</a>
<a id='n531' href='#n531'>531</a>
<a id='n532' href='#n532'>532</a>
<a id='n533' href='#n533'>533</a>
<a id='n534' href='#n534'>534</a>
<a id='n535' href='#n535'>535</a>
<a id='n536' href='#n536'>536</a>
<a id='n537' href='#n537'>537</a>
<a id='n538' href='#n538'>538</a>
<a id='n539' href='#n539'>539</a>
<a id='n540' href='#n540'>540</a>
<a id='n541' href='#n541'>541</a>
<a id='n542' href='#n542'>542</a>
<a id='n543' href='#n543'>543</a>
<a id='n544' href='#n544'>544</a>
<a id='n545' href='#n545'>545</a>
<a id='n546' href='#n546'>546</a>
<a id='n547' href='#n547'>547</a>
<a id='n548' href='#n548'>548</a>
<a id='n549' href='#n549'>549</a>
<a id='n550' href='#n550'>550</a>
<a id='n551' href='#n551'>551</a>
<a id='n552' href='#n552'>552</a>
<a id='n553' href='#n553'>553</a>
<a id='n554' href='#n554'>554</a>
<a id='n555' href='#n555'>555</a>
<a id='n556' href='#n556'>556</a>
<a id='n557' href='#n557'>557</a>
<a id='n558' href='#n558'>558</a>
<a id='n559' href='#n559'>559</a>
<a id='n560' href='#n560'>560</a>
<a id='n561' href='#n561'>561</a>
<a id='n562' href='#n562'>562</a>
<a id='n563' href='#n563'>563</a>
<a id='n564' href='#n564'>564</a>
<a id='n565' href='#n565'>565</a>
<a id='n566' href='#n566'>566</a>
<a id='n567' href='#n567'>567</a>
<a id='n568' href='#n568'>568</a>
<a id='n569' href='#n569'>569</a>
<a id='n570' href='#n570'>570</a>
<a id='n571' href='#n571'>571</a>
<a id='n572' href='#n572'>572</a>
<a id='n573' href='#n573'>573</a>
<a id='n574' href='#n574'>574</a>
<a id='n575' href='#n575'>575</a>
<a id='n576' href='#n576'>576</a>
<a id='n577' href='#n577'>577</a>
<a id='n578' href='#n578'>578</a>
<a id='n579' href='#n579'>579</a>
<a id='n580' href='#n580'>580</a>
<a id='n581' href='#n581'>581</a>
<a id='n582' href='#n582'>582</a>
<a id='n583' href='#n583'>583</a>
<a id='n584' href='#n584'>584</a>
<a id='n585' href='#n585'>585</a>
<a id='n586' href='#n586'>586</a>
<a id='n587' href='#n587'>587</a>
<a id='n588' href='#n588'>588</a>
<a id='n589' href='#n589'>589</a>
<a id='n590' href='#n590'>590</a>
<a id='n591' href='#n591'>591</a>
<a id='n592' href='#n592'>592</a>
<a id='n593' href='#n593'>593</a>
<a id='n594' href='#n594'>594</a>
<a id='n595' href='#n595'>595</a>
<a id='n596' href='#n596'>596</a>
<a id='n597' href='#n597'>597</a>
<a id='n598' href='#n598'>598</a>
<a id='n599' href='#n599'>599</a>
<a id='n600' href='#n600'>600</a>
<a id='n601' href='#n601'>601</a>
<a id='n602' href='#n602'>602</a>
<a id='n603' href='#n603'>603</a>
<a id='n604' href='#n604'>604</a>
<a id='n605' href='#n605'>605</a>
<a id='n606' href='#n606'>606</a>
<a id='n607' href='#n607'>607</a>
<a id='n608' href='#n608'>608</a>
<a id='n609' href='#n609'>609</a>
<a id='n610' href='#n610'>610</a>
<a id='n611' href='#n611'>611</a>
<a id='n612' href='#n612'>612</a>
<a id='n613' href='#n613'>613</a>
<a id='n614' href='#n614'>614</a>
<a id='n615' href='#n615'>615</a>
<a id='n616' href='#n616'>616</a>
<a id='n617' href='#n617'>617</a>
<a id='n618' href='#n618'>618</a>
<a id='n619' href='#n619'>619</a>
<a id='n620' href='#n620'>620</a>
<a id='n621' href='#n621'>621</a>
<a id='n622' href='#n622'>622</a>
<a id='n623' href='#n623'>623</a>
<a id='n624' href='#n624'>624</a>
<a id='n625' href='#n625'>625</a>
<a id='n626' href='#n626'>626</a>
<a id='n627' href='#n627'>627</a>
<a id='n628' href='#n628'>628</a>
<a id='n629' href='#n629'>629</a>
<a id='n630' href='#n630'>630</a>
<a id='n631' href='#n631'>631</a>
<a id='n632' href='#n632'>632</a>
<a id='n633' href='#n633'>633</a>
<a id='n634' href='#n634'>634</a>
<a id='n635' href='#n635'>635</a>
<a id='n636' href='#n636'>636</a>
<a id='n637' href='#n637'>637</a>
<a id='n638' href='#n638'>638</a>
<a id='n639' href='#n639'>639</a>
<a id='n640' href='#n640'>640</a>
<a id='n641' href='#n641'>641</a>
<a id='n642' href='#n642'>642</a>
<a id='n643' href='#n643'>643</a>
<a id='n644' href='#n644'>644</a>
<a id='n645' href='#n645'>645</a>
<a id='n646' href='#n646'>646</a>
<a id='n647' href='#n647'>647</a>
<a id='n648' href='#n648'>648</a>
<a id='n649' href='#n649'>649</a>
<a id='n650' href='#n650'>650</a>
<a id='n651' href='#n651'>651</a>
<a id='n652' href='#n652'>652</a>
<a id='n653' href='#n653'>653</a>
<a id='n654' href='#n654'>654</a>
<a id='n655' href='#n655'>655</a>
<a id='n656' href='#n656'>656</a>
<a id='n657' href='#n657'>657</a>
<a id='n658' href='#n658'>658</a>
<a id='n659' href='#n659'>659</a>
<a id='n660' href='#n660'>660</a>
<a id='n661' href='#n661'>661</a>
<a id='n662' href='#n662'>662</a>
<a id='n663' href='#n663'>663</a>
<a id='n664' href='#n664'>664</a>
<a id='n665' href='#n665'>665</a>
<a id='n666' href='#n666'>666</a>
<a id='n667' href='#n667'>667</a>
<a id='n668' href='#n668'>668</a>
<a id='n669' href='#n669'>669</a>
<a id='n670' href='#n670'>670</a>
<a id='n671' href='#n671'>671</a>
<a id='n672' href='#n672'>672</a>
<a id='n673' href='#n673'>673</a>
<a id='n674' href='#n674'>674</a>
<a id='n675' href='#n675'>675</a>
<a id='n676' href='#n676'>676</a>
<a id='n677' href='#n677'>677</a>
<a id='n678' href='#n678'>678</a>
<a id='n679' href='#n679'>679</a>
<a id='n680' href='#n680'>680</a>
<a id='n681' href='#n681'>681</a>
<a id='n682' href='#n682'>682</a>
<a id='n683' href='#n683'>683</a>
<a id='n684' href='#n684'>684</a>
<a id='n685' href='#n685'>685</a>
<a id='n686' href='#n686'>686</a>
<a id='n687' href='#n687'>687</a>
<a id='n688' href='#n688'>688</a>
<a id='n689' href='#n689'>689</a>
<a id='n690' href='#n690'>690</a>
<a id='n691' href='#n691'>691</a>
<a id='n692' href='#n692'>692</a>
<a id='n693' href='#n693'>693</a>
<a id='n694' href='#n694'>694</a>
<a id='n695' href='#n695'>695</a>
<a id='n696' href='#n696'>696</a>
<a id='n697' href='#n697'>697</a>
<a id='n698' href='#n698'>698</a>
<a id='n699' href='#n699'>699</a>
<a id='n700' href='#n700'>700</a>
<a id='n701' href='#n701'>701</a>
<a id='n702' href='#n702'>702</a>
<a id='n703' href='#n703'>703</a>
<a id='n704' href='#n704'>704</a>
<a id='n705' href='#n705'>705</a>
<a id='n706' href='#n706'>706</a>
<a id='n707' href='#n707'>707</a>
<a id='n708' href='#n708'>708</a>
<a id='n709' href='#n709'>709</a>
<a id='n710' href='#n710'>710</a>
<a id='n711' href='#n711'>711</a>
<a id='n712' href='#n712'>712</a>
<a id='n713' href='#n713'>713</a>
<a id='n714' href='#n714'>714</a>
<a id='n715' href='#n715'>715</a>
<a id='n716' href='#n716'>716</a>
<a id='n717' href='#n717'>717</a>
<a id='n718' href='#n718'>718</a>
<a id='n719' href='#n719'>719</a>
<a id='n720' href='#n720'>720</a>
<a id='n721' href='#n721'>721</a>
<a id='n722' href='#n722'>722</a>
<a id='n723' href='#n723'>723</a>
<a id='n724' href='#n724'>724</a>
<a id='n725' href='#n725'>725</a>
<a id='n726' href='#n726'>726</a>
<a id='n727' href='#n727'>727</a>
<a id='n728' href='#n728'>728</a>
<a id='n729' href='#n729'>729</a>
<a id='n730' href='#n730'>730</a>
<a id='n731' href='#n731'>731</a>
<a id='n732' href='#n732'>732</a>
<a id='n733' href='#n733'>733</a>
<a id='n734' href='#n734'>734</a>
<a id='n735' href='#n735'>735</a>
<a id='n736' href='#n736'>736</a>
<a id='n737' href='#n737'>737</a>
<a id='n738' href='#n738'>738</a>
<a id='n739' href='#n739'>739</a>
<a id='n740' href='#n740'>740</a>
<a id='n741' href='#n741'>741</a>
<a id='n742' href='#n742'>742</a>
<a id='n743' href='#n743'>743</a>
<a id='n744' href='#n744'>744</a>
<a id='n745' href='#n745'>745</a>
<a id='n746' href='#n746'>746</a>
<a id='n747' href='#n747'>747</a>
<a id='n748' href='#n748'>748</a>
<a id='n749' href='#n749'>749</a>
<a id='n750' href='#n750'>750</a>
<a id='n751' href='#n751'>751</a>
<a id='n752' href='#n752'>752</a>
<a id='n753' href='#n753'>753</a>
<a id='n754' href='#n754'>754</a>
<a id='n755' href='#n755'>755</a>
<a id='n756' href='#n756'>756</a>
<a id='n757' href='#n757'>757</a>
<a id='n758' href='#n758'>758</a>
<a id='n759' href='#n759'>759</a>
<a id='n760' href='#n760'>760</a>
<a id='n761' href='#n761'>761</a>
<a id='n762' href='#n762'>762</a>
<a id='n763' href='#n763'>763</a>
<a id='n764' href='#n764'>764</a>
<a id='n765' href='#n765'>765</a>
<a id='n766' href='#n766'>766</a>
<a id='n767' href='#n767'>767</a>
<a id='n768' href='#n768'>768</a>
<a id='n769' href='#n769'>769</a>
<a id='n770' href='#n770'>770</a>
<a id='n771' href='#n771'>771</a>
<a id='n772' href='#n772'>772</a>
<a id='n773' href='#n773'>773</a>
<a id='n774' href='#n774'>774</a>
<a id='n775' href='#n775'>775</a>
<a id='n776' href='#n776'>776</a>
<a id='n777' href='#n777'>777</a>
<a id='n778' href='#n778'>778</a>
<a id='n779' href='#n779'>779</a>
<a id='n780' href='#n780'>780</a>
<a id='n781' href='#n781'>781</a>
<a id='n782' href='#n782'>782</a>
<a id='n783' href='#n783'>783</a>
<a id='n784' href='#n784'>784</a>
<a id='n785' href='#n785'>785</a>
<a id='n786' href='#n786'>786</a>
<a id='n787' href='#n787'>787</a>
<a id='n788' href='#n788'>788</a>
<a id='n789' href='#n789'>789</a>
<a id='n790' href='#n790'>790</a>
<a id='n791' href='#n791'>791</a>
<a id='n792' href='#n792'>792</a>
<a id='n793' href='#n793'>793</a>
<a id='n794' href='#n794'>794</a>
<a id='n795' href='#n795'>795</a>
<a id='n796' href='#n796'>796</a>
<a id='n797' href='#n797'>797</a>
<a id='n798' href='#n798'>798</a>
<a id='n799' href='#n799'>799</a>
<a id='n800' href='#n800'>800</a>
<a id='n801' href='#n801'>801</a>
<a id='n802' href='#n802'>802</a>
<a id='n803' href='#n803'>803</a>
<a id='n804' href='#n804'>804</a>
<a id='n805' href='#n805'>805</a>
<a id='n806' href='#n806'>806</a>
<a id='n807' href='#n807'>807</a>
<a id='n808' href='#n808'>808</a>
<a id='n809' href='#n809'>809</a>
<a id='n810' href='#n810'>810</a>
<a id='n811' href='#n811'>811</a>
<a id='n812' href='#n812'>812</a>
<a id='n813' href='#n813'>813</a>
<a id='n814' href='#n814'>814</a>
<a id='n815' href='#n815'>815</a>
<a id='n816' href='#n816'>816</a>
<a id='n817' href='#n817'>817</a>
<a id='n818' href='#n818'>818</a>
<a id='n819' href='#n819'>819</a>
<a id='n820' href='#n820'>820</a>
<a id='n821' href='#n821'>821</a>
<a id='n822' href='#n822'>822</a>
<a id='n823' href='#n823'>823</a>
<a id='n824' href='#n824'>824</a>
<a id='n825' href='#n825'>825</a>
<a id='n826' href='#n826'>826</a>
<a id='n827' href='#n827'>827</a>
<a id='n828' href='#n828'>828</a>
<a id='n829' href='#n829'>829</a>
<a id='n830' href='#n830'>830</a>
<a id='n831' href='#n831'>831</a>
<a id='n832' href='#n832'>832</a>
<a id='n833' href='#n833'>833</a>
<a id='n834' href='#n834'>834</a>
<a id='n835' href='#n835'>835</a>
<a id='n836' href='#n836'>836</a>
<a id='n837' href='#n837'>837</a>
<a id='n838' href='#n838'>838</a>
<a id='n839' href='#n839'>839</a>
<a id='n840' href='#n840'>840</a>
<a id='n841' href='#n841'>841</a>
<a id='n842' href='#n842'>842</a>
<a id='n843' href='#n843'>843</a>
<a id='n844' href='#n844'>844</a>
<a id='n845' href='#n845'>845</a>
<a id='n846' href='#n846'>846</a>
<a id='n847' href='#n847'>847</a>
<a id='n848' href='#n848'>848</a>
<a id='n849' href='#n849'>849</a>
<a id='n850' href='#n850'>850</a>
<a id='n851' href='#n851'>851</a>
<a id='n852' href='#n852'>852</a>
<a id='n853' href='#n853'>853</a>
<a id='n854' href='#n854'>854</a>
<a id='n855' href='#n855'>855</a>
<a id='n856' href='#n856'>856</a>
<a id='n857' href='#n857'>857</a>
<a id='n858' href='#n858'>858</a>
<a id='n859' href='#n859'>859</a>
<a id='n860' href='#n860'>860</a>
<a id='n861' href='#n861'>861</a>
<a id='n862' href='#n862'>862</a>
<a id='n863' href='#n863'>863</a>
<a id='n864' href='#n864'>864</a>
<a id='n865' href='#n865'>865</a>
<a id='n866' href='#n866'>866</a>
<a id='n867' href='#n867'>867</a>
<a id='n868' href='#n868'>868</a>
<a id='n869' href='#n869'>869</a>
<a id='n870' href='#n870'>870</a>
<a id='n871' href='#n871'>871</a>
<a id='n872' href='#n872'>872</a>
<a id='n873' href='#n873'>873</a>
<a id='n874' href='#n874'>874</a>
<a id='n875' href='#n875'>875</a>
<a id='n876' href='#n876'>876</a>
<a id='n877' href='#n877'>877</a>
<a id='n878' href='#n878'>878</a>
<a id='n879' href='#n879'>879</a>
<a id='n880' href='#n880'>880</a>
<a id='n881' href='#n881'>881</a>
<a id='n882' href='#n882'>882</a>
<a id='n883' href='#n883'>883</a>
<a id='n884' href='#n884'>884</a>
<a id='n885' href='#n885'>885</a>
<a id='n886' href='#n886'>886</a>
<a id='n887' href='#n887'>887</a>
<a id='n888' href='#n888'>888</a>
<a id='n889' href='#n889'>889</a>
<a id='n890' href='#n890'>890</a>
<a id='n891' href='#n891'>891</a>
<a id='n892' href='#n892'>892</a>
<a id='n893' href='#n893'>893</a>
<a id='n894' href='#n894'>894</a>
<a id='n895' href='#n895'>895</a>
<a id='n896' href='#n896'>896</a>
<a id='n897' href='#n897'>897</a>
<a id='n898' href='#n898'>898</a>
<a id='n899' href='#n899'>899</a>
<a id='n900' href='#n900'>900</a>
<a id='n901' href='#n901'>901</a>
<a id='n902' href='#n902'>902</a>
<a id='n903' href='#n903'>903</a>
<a id='n904' href='#n904'>904</a>
<a id='n905' href='#n905'>905</a>
<a id='n906' href='#n906'>906</a>
<a id='n907' href='#n907'>907</a>
<a id='n908' href='#n908'>908</a>
<a id='n909' href='#n909'>909</a>
<a id='n910' href='#n910'>910</a>
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<td class='lines'><pre><code><span class="hl com">/* SPDX-License-Identifier: LGPL-2.1-or-later */</span>
<span class="hl com">/*</span>
<span class="hl com"> * Copyright (C) 2022 - Jacopo Mondi &lt;jacopo&#64;jmondi.org&gt;</span>
<span class="hl com"> *</span>
<span class="hl com"> * imx8-isi.cpp - Pipeline handler for ISI interface found on NXP i.MX8 SoC</span>
<span class="hl com"> */</span>

<span class="hl ppc">#include &lt;algorithm&gt;</span>
<span class="hl ppc">#include &lt;map&gt;</span>
<span class="hl ppc">#include &lt;memory&gt;</span>
<span class="hl ppc">#include &lt;set&gt;</span>
<span class="hl ppc">#include &lt;string&gt;</span>
<span class="hl ppc">#include &lt;vector&gt;</span>

<span class="hl ppc">#include &lt;libcamera/base/log.h&gt;</span>
<span class="hl ppc">#include &lt;libcamera/base/utils.h&gt;</span>

<span class="hl ppc">#include &lt;libcamera/camera_manager.h&gt;</span>
<span class="hl ppc">#include &lt;libcamera/formats.h&gt;</span>
<span class="hl ppc">#include &lt;libcamera/geometry.h&gt;</span>
<span class="hl ppc">#include &lt;libcamera/stream.h&gt;</span>

<span class="hl ppc">#include</span> <span class="hl pps">&quot;libcamera/internal/bayer_format.h&quot;</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">&quot;libcamera/internal/camera.h&quot;</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">&quot;libcamera/internal/camera_sensor.h&quot;</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">&quot;libcamera/internal/device_enumerator.h&quot;</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">&quot;libcamera/internal/media_device.h&quot;</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">&quot;libcamera/internal/pipeline_handler.h&quot;</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">&quot;libcamera/internal/v4l2_subdevice.h&quot;</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">&quot;libcamera/internal/v4l2_videodevice.h&quot;</span><span class="hl ppc"></span>

<span class="hl ppc">#include</span> <span class="hl pps">&quot;linux/media-bus-format.h&quot;</span><span class="hl ppc"></span>

<span class="hl kwa">namespace</span> libcamera <span class="hl opt">{</span>

<span class="hl kwd">LOG_DEFINE_CATEGORY</span><span class="hl opt">(</span>ISI<span class="hl opt">)</span>

<span class="hl kwc">class</span> PipelineHandlerISI<span class="hl opt">;</span>

<span class="hl kwc">class</span> ISICameraData <span class="hl opt">:</span> <span class="hl kwc">public Camera</span><span class="hl opt">::</span>Private
<span class="hl opt">{</span>
<span class="hl kwc">public</span><span class="hl opt">:</span>
	<span class="hl kwd">ISICameraData</span><span class="hl opt">(</span>PipelineHandler <span class="hl opt">*</span>ph<span class="hl opt">)</span>
		<span class="hl opt">:</span> <span class="hl kwc">Camera</span><span class="hl opt">::</span><span class="hl kwd">Private</span><span class="hl opt">(</span>ph<span class="hl opt">)</span>
	<span class="hl opt">{</span>
		<span class="hl com">/*</span>
<span class="hl com">		 * \todo Assume 2 channels only for now, as that&apos;s the number of</span>
<span class="hl com">		 * available channels on i.MX8MP.</span>
<span class="hl com">		 */</span>
		streams_<span class="hl opt">.</span><span class="hl kwd">resize</span><span class="hl opt">(</span><span class="hl num">2</span><span class="hl opt">);</span>
	<span class="hl opt">}</span>

	PipelineHandlerISI <span class="hl opt">*</span><span class="hl kwd">pipe</span><span class="hl opt">();</span>

	<span class="hl kwb">int</span> <span class="hl kwd">init</span><span class="hl opt">();</span>

	<span class="hl kwb">unsigned int</span> <span class="hl kwd">pipeIndex</span><span class="hl opt">(</span><span class="hl kwb">const</span> Stream <span class="hl opt">*</span>stream<span class="hl opt">)</span>
	<span class="hl opt">{</span>
		<span class="hl kwa">return</span> stream <span class="hl opt">- &amp;*</span>streams_<span class="hl opt">.</span><span class="hl kwd">begin</span><span class="hl opt">();</span>
	<span class="hl opt">}</span>

	<span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt">&lt;</span>CameraSensor<span class="hl opt">&gt;</span> sensor_<span class="hl opt">;</span>
	<span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt">&lt;</span>V4L2Subdevice<span class="hl opt">&gt;</span> csis_<span class="hl opt">;</span>

	<span class="hl kwc">std</span><span class="hl opt">::</span>vector<span class="hl opt">&lt;</span>Stream<span class="hl opt">&gt;</span> streams_<span class="hl opt">;</span>

	<span class="hl kwc">std</span><span class="hl opt">::</span>vector<span class="hl opt">&lt;</span>Stream <span class="hl opt">*&gt;</span> enabledStreams_<span class="hl opt">;</span>

	<span class="hl kwb">unsigned int</span> xbarSink_<span class="hl opt">;</span>
<span class="hl opt">};</span>

<span class="hl kwc">class</span> ISICameraConfiguration <span class="hl opt">:</span> <span class="hl kwc">public</span> CameraConfiguration
<span class="hl opt">{</span>
<span class="hl kwc">public</span><span class="hl opt">:</span>
	<span class="hl com">/*</span>
<span class="hl com">	 * formatsMap_ records the association between an output pixel format</span>
<span class="hl com">	 * and the combination of V4L2 pixel format and media bus codes that have