SkadiLabs/gstreamerViewer
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

add image rotation and flipping

Browse Source
This commit is contained in:
Maik Jurischka
2025-12-19 09:31:37 +01:00
parent bef80372b6
commit 705519ec39
4 changed files with 110 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

91
videoviewerwidget.cpp
View File

@@ -5,6 +5,7 @@
#include <QGroupBox>
#include <QDebug>
#include <QPixmap>
#include <QTransform>
#include <gst/video/video.h>
VideoViewerWidget::VideoViewerWidget(QWidget *parent)
@@ -19,10 +20,16 @@ VideoViewerWidget::VideoViewerWidget(QWidget *parent)
m_statusLabel(nullptr),
m_zoomSlider(nullptr),
m_zoomLabel(nullptr),
m_rotationCombo(nullptr),
m_flipHorizontal(nullptr),
m_flipVertical(nullptr),
m_pipeline(nullptr),
m_appSink(nullptr),
m_zoomFactor(1.0),
m_busWatchId(0)
m_busWatchId(0),
m_rotationAngle(0),
m_flipHorizontalEnabled(false),
m_flipVerticalEnabled(false)
{
initGStreamer();
setupUI();
@@ -77,6 +84,30 @@ void VideoViewerWidget::setupUI()
zoomLayout->addWidget(m_zoomSlider);
zoomLayout->addWidget(m_zoomLabel);
auto* transformLayout = new QHBoxLayout();
transformLayout->addWidget(new QLabel("Rotation:", this));
m_rotationCombo = new QComboBox(this);
m_rotationCombo->addItem("0°", 0);
m_rotationCombo->addItem("90°", 90);
m_rotationCombo->addItem("180°", 180);
m_rotationCombo->addItem("270°", 270);
m_rotationCombo->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
m_rotationCombo->setMinimumWidth(70);
connect(m_rotationCombo, QOverload<int>::of(&QComboBox::currentIndexChanged),
this, &VideoViewerWidget::onRotationChanged);
transformLayout->addWidget(m_rotationCombo);
m_flipHorizontal = new QCheckBox("Flip H", this);
connect(m_flipHorizontal, &QCheckBox::checkStateChanged, this, &VideoViewerWidget::onFlipHorizontalChanged);
transformLayout->addWidget(m_flipHorizontal);
m_flipVertical = new QCheckBox("Flip V", this);
connect(m_flipVertical, &QCheckBox::checkStateChanged, this, &VideoViewerWidget::onFlipVerticalChanged);
transformLayout->addWidget(m_flipVertical);
transformLayout->addStretch();
auto* controlGroup = new QGroupBox("Viewer Controls", this);
auto* controlLayout = new QVBoxLayout();
@@ -88,9 +119,11 @@ void VideoViewerWidget::setupUI()
m_sourceType->addItem("TCP H.264 Stream", "tcp");
m_sourceType->addItem("MJPEG HTTP Stream", "http");
m_sourceType->addItem("Test Pattern", "test");
m_sourceType->setSizeAdjustPolicy(QComboBox::AdjustToMinimumContentsLengthWithIcon);
m_sourceType->setMinimumContentsLength(15);
connect(m_sourceType, QOverload<int>::of(&QComboBox::currentIndexChanged),
this, &VideoViewerWidget::onSourceTypeChanged);
sourceLayout->addWidget(m_sourceType);
sourceLayout->addWidget(m_sourceType, 1);
auto* formLayout = new QFormLayout();
m_hostEdit = new QLineEdit("127.0.0.1", this);
@@ -117,9 +150,11 @@ void VideoViewerWidget::setupUI()
controlLayout->addLayout(buttonLayout);
controlLayout->addWidget(m_statusLabel);
controlGroup->setLayout(controlLayout);
controlGroup->setMaximumWidth(500);
mainLayout->addWidget(m_scrollArea, 1);
mainLayout->addLayout(zoomLayout);
mainLayout->addLayout(transformLayout);
mainLayout->addWidget(controlGroup);
setLayout(mainLayout);
@@ -352,6 +387,33 @@ void VideoViewerWidget::onZoomChanged(int value)
}
}
void VideoViewerWidget::onRotationChanged(int index)
{
m_rotationAngle = m_rotationCombo->currentData().toInt();
if (!m_currentFrame.isNull()) {
displayFrame(m_currentFrame);
}
}
void VideoViewerWidget::onFlipHorizontalChanged(Qt::CheckState state)
{
m_flipHorizontalEnabled = (state == Qt::Checked);
if (!m_currentFrame.isNull()) {
displayFrame(m_currentFrame);
}
}
void VideoViewerWidget::onFlipVerticalChanged(Qt::CheckState state)
{
m_flipVerticalEnabled = (state == Qt::Checked);
if (!m_currentFrame.isNull()) {
displayFrame(m_currentFrame);
}
}
GstFlowReturn VideoViewerWidget::newSampleCallback(GstAppSink* appsink, gpointer user_data)
{
static int callbackCount = 0;
@@ -453,13 +515,34 @@ void VideoViewerWidget::displayFrame(const QImage& frame)
m_currentFrame = frame;
QPixmap pixmap = QPixmap::fromImage(frame);
QImage transformedFrame = frame;
// Apply rotation
if (m_rotationAngle != 0) {
QTransform rotation;
rotation.rotate(m_rotationAngle);
transformedFrame = transformedFrame.transformed(rotation, Qt::SmoothTransformation);
}
// Apply flipping
if (m_flipHorizontalEnabled || m_flipVerticalEnabled) {
Qt::Orientations orientations;
if (m_flipHorizontalEnabled) {
orientations |= Qt::Horizontal;
}
if (m_flipVerticalEnabled) {
orientations |= Qt::Vertical;
}
transformedFrame = transformedFrame.flipped(orientations);
}
QPixmap pixmap = QPixmap::fromImage(transformedFrame);
if (pixmap.isNull()) {
qDebug() << "[VideoViewer] ERROR: Pixmap conversion failed!";
return;
}
QSize targetSize = frame.size() * m_zoomFactor;
QSize targetSize = transformedFrame.size() * m_zoomFactor;
QPixmap scaledPixmap = pixmap.scaled(targetSize,
Qt::KeepAspectRatio,