diff options
Diffstat (limited to 'src/apps/qcam/main_window.cpp')
| -rw-r--r-- | src/apps/qcam/main_window.cpp | 787 |
1 files changed, 787 insertions, 0 deletions
diff --git a/src/apps/qcam/main_window.cpp b/src/apps/qcam/main_window.cpp new file mode 100644 index 00000000..361d5825 --- /dev/null +++ b/src/apps/qcam/main_window.cpp @@ -0,0 +1,787 @@ +/* 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 <QCoreApplication> +#include <QFileDialog> +#include <QImage> +#include <QImageWriter> +#include <QMutexLocker> +#include <QStandardPaths> +#include <QStringList> +#include <QTimer> +#include <QToolBar> +#include <QToolButton> +#include <QtDebug> + +#include "../common/dng_writer.h" +#include "../common/image.h" + +#include "cam_select_dialog.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::renderComplete); + viewfinder_ = viewfinder; + setCentralWidget(viewfinder); +#ifndef QT_NO_OPENGL + } else if (renderType == "gles") { + ViewFinderGL *viewfinder = new ViewFinderGL(this); + connect(viewfinder, &ViewFinderGL::renderComplete, + this, &MainWindow::renderComplete); + 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); + + cameraSelectorDialog_ = new CameraSelectorDialog(cm_, this); + + /* 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(QKeySequence::Quit); + connect(action, &QAction::triggered, this, &MainWindow::quit); + + /* Camera selector. */ + cameraSelectButton_ = new QPushButton; + connect(cameraSelectButton_, &QPushButton::clicked, + this, &MainWindow::switchCamera); + + toolbar_->addWidget(cameraSelectButton_); + + 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() +{ + /* Get and acquire the new camera. */ + std::string newCameraId = chooseCamera(); + + if (newCameraId.empty()) + return; + + if (camera_ && newCameraId == camera_->id()) + return; + + const std::shared_ptr<Camera> &cam = cm_->get(newCameraId); + + 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); + + if (camera_) + camera_->release(); + + camera_ = cam; + + startStopAction_->setChecked(true); + + /* Display the current cameraId in the toolbar .*/ + cameraSelectButton_->setText(QString::fromStdString(newCameraId)); +} + +std::string MainWindow::chooseCamera() +{ + if (cameraSelectorDialog_->exec() != QDialog::Accepted) + return std::string(); + + return cameraSelectorDialog_->getCameraId(); +} + +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 camera switch button with the currently selected Camera id. */ + cameraSelectButton_->setText(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() +{ + std::vector<StreamRole> 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: + qWarning() << "Unsupported stream configuration"; + return -EINVAL; + } + + /* 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. If no color space is reported, default to + * sYCC. + */ + ret = viewfinder_->setFormat(vfConfig.pixelFormat, + QSize(vfConfig.size.width, vfConfig.size.height), + vfConfig.colorSpace.value_or(ColorSpace::Sycc), + 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 = 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(); + QString cameraId = QString::fromStdString(camera->id()); + HotplugEvent::PlugEvent event = e->hotplugEvent(); + + if (event == HotplugEvent::HotPlug) { + cameraSelectorDialog_->addCamera(cameraId); + } else if (event == HotplugEvent::HotUnplug) { + /* Check if the currently-streaming camera is removed. */ + if (camera == camera_.get()) { + toggleCapture(false); + camera_->release(); + camera_.reset(); + } + + cameraSelectorDialog_->removeCamera(cameraId); + } +} + +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::renderComplete(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"; + } + } + queueRequest(request); +} + +int MainWindow::queueRequest(Request *request) +{ + return camera_->queueRequest(request); +} |