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This commit is contained in:
Maik Jurischka
323
videoviewerwidget.cpp
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323
videoviewerwidget.cpp
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#include "videoviewerwidget.h"
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#include <QVBoxLayout>
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#include <QHBoxLayout>
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#include <QFormLayout>
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#include <QGroupBox>
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#include <QDebug>
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#include <QTimer>
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#include <gst/video/videooverlay.h>
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VideoViewerWidget::VideoViewerWidget(QWidget *parent)
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: QWidget(parent), m_pipeline(nullptr), m_videoSink(nullptr),
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m_busWatchId(0), m_windowId(0)
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{
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initGStreamer();
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setupUI();
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}
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VideoViewerWidget::~VideoViewerWidget()
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{
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cleanupGStreamer();
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}
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void VideoViewerWidget::initGStreamer()
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{
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gst_init(nullptr, nullptr);
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}
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void VideoViewerWidget::setupUI()
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{
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QVBoxLayout* mainLayout = new QVBoxLayout(this);
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// Video display container
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QGroupBox* videoGroup = new QGroupBox("Video Display", this);
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QVBoxLayout* videoLayout = new QVBoxLayout();
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m_videoContainer = new QWidget(this);
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m_videoContainer->setMinimumSize(640, 480);
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m_videoContainer->setStyleSheet("background-color: black;");
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m_videoContainer->setAttribute(Qt::WA_NativeWindow);
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videoLayout->addWidget(m_videoContainer);
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videoGroup->setLayout(videoLayout);
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// Controls
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QGroupBox* controlGroup = new QGroupBox("Viewer Controls", this);
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QVBoxLayout* controlLayout = new QVBoxLayout();
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// Source type selection
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QHBoxLayout* sourceLayout = new QHBoxLayout();
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sourceLayout->addWidget(new QLabel("Source Type:", this));
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m_sourceType = new QComboBox(this);
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m_sourceType->addItem("UDP MJPEG Stream (No plugins needed)", "udp-mjpeg");
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m_sourceType->addItem("UDP H.264 Stream (Requires gst-libav)", "udp-h264");
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m_sourceType->addItem("TCP H.264 Stream", "tcp");
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m_sourceType->addItem("MJPEG HTTP Stream", "http");
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m_sourceType->addItem("Test Pattern", "test");
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connect(m_sourceType, QOverload<int>::of(&QComboBox::currentIndexChanged),
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this, &VideoViewerWidget::onSourceTypeChanged);
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sourceLayout->addWidget(m_sourceType);
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// Host and port
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QFormLayout* formLayout = new QFormLayout();
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m_hostEdit = new QLineEdit("127.0.0.1", this);
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m_portEdit = new QLineEdit("5000", this);
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formLayout->addRow("Host:", m_hostEdit);
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formLayout->addRow("Port:", m_portEdit);
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// Control buttons
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QHBoxLayout* buttonLayout = new QHBoxLayout();
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m_startBtn = new QPushButton("Start Viewer", this);
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m_stopBtn = new QPushButton("Stop Viewer", this);
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m_stopBtn->setEnabled(false);
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connect(m_startBtn, &QPushButton::clicked, this, &VideoViewerWidget::onStartViewer);
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connect(m_stopBtn, &QPushButton::clicked, this, &VideoViewerWidget::onStopViewer);
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buttonLayout->addWidget(m_startBtn);
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buttonLayout->addWidget(m_stopBtn);
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// Status label
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m_statusLabel = new QLabel("Status: Stopped", this);
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m_statusLabel->setStyleSheet("QLabel { background-color: #f0f0f0; padding: 5px; border-radius: 3px; }");
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controlLayout->addLayout(sourceLayout);
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controlLayout->addLayout(formLayout);
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controlLayout->addLayout(buttonLayout);
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controlLayout->addWidget(m_statusLabel);
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controlGroup->setLayout(controlLayout);
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mainLayout->addWidget(videoGroup, 1);
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mainLayout->addWidget(controlGroup);
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setLayout(mainLayout);
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}
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void VideoViewerWidget::showEvent(QShowEvent* event)
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{
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QWidget::showEvent(event);
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if (!m_windowId) {
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m_videoContainer->winId(); // Force window creation
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QTimer::singleShot(100, this, [this]() {
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m_windowId = m_videoContainer->winId();
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qDebug() << "[VideoViewer] Window ID initialized:" << m_windowId;
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});
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}
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}
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QString VideoViewerWidget::buildPipelineString()
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{
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QString sourceType = m_sourceType->currentData().toString();
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QString host = m_hostEdit->text();
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QString port = m_portEdit->text();
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QString pipeline;
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// Note: Using autovideosink which opens a separate window
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// VideoOverlay with Qt widgets doesn't work reliably on this system
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if (sourceType == "udp-mjpeg") {
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pipeline = QString("udpsrc port=%1 ! application/x-rtp,encoding-name=JPEG,payload=26 ! "
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"rtpjpegdepay ! jpegdec ! autovideosink")
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.arg(port);
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} else if (sourceType == "udp-h264") {
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pipeline = QString("udpsrc port=%1 ! application/x-rtp,encoding-name=H264 ! "
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"rtph264depay ! h264parse ! avdec_h264 ! videoconvert ! autovideosink")
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.arg(port);
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} else if (sourceType == "tcp") {
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pipeline = QString("tcpclientsrc host=%1 port=%2 ! tsdemux ! h264parse ! avdec_h264 ! "
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"videoconvert ! autovideosink")
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.arg(host).arg(port);
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} else if (sourceType == "http") {
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pipeline = QString("souphttpsrc location=http://%1:%2 ! multipartdemux ! jpegdec ! "
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"videoconvert ! autovideosink")
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.arg(host).arg(port);
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} else if (sourceType == "test") {
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pipeline = "videotestsrc ! autovideosink";
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}
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return pipeline;
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}
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void VideoViewerWidget::startPipeline()
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{
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if (m_pipeline) {
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stopPipeline();
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}
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QString pipelineStr = buildPipelineString();
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qDebug() << "[VideoViewer] Starting pipeline:" << pipelineStr;
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GError* error = nullptr;
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m_pipeline = gst_parse_launch(pipelineStr.toUtf8().constData(), &error);
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if (error) {
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m_statusLabel->setText(QString("Status: Pipeline Error - %1").arg(error->message));
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m_statusLabel->setStyleSheet("QLabel { background-color: #FFB6C1; padding: 5px; border-radius: 3px; }");
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g_error_free(error);
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return;
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}
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if (!m_pipeline) {
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m_statusLabel->setText("Status: Failed to create pipeline");
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m_statusLabel->setStyleSheet("QLabel { background-color: #FFB6C1; padding: 5px; border-radius: 3px; }");
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return;
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}
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// Set up bus callback
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GstBus* bus = gst_element_get_bus(m_pipeline);
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m_busWatchId = gst_bus_add_watch(bus, busCallback, this);
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gst_object_unref(bus);
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// Note: VideoOverlay disabled - using autovideosink with separate window instead
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// Start playing
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GstStateChangeReturn ret = gst_element_set_state(m_pipeline, GST_STATE_PLAYING);
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qDebug() << "[VideoViewer] Pipeline state change return:" << ret;
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if (ret == GST_STATE_CHANGE_FAILURE) {
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m_statusLabel->setText("Status: Failed to start pipeline");
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m_statusLabel->setStyleSheet("QLabel { background-color: #FFB6C1; padding: 5px; border-radius: 3px; }");
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cleanupGStreamer();
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return;
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}
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qDebug() << "[VideoViewer] Pipeline started successfully";
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m_statusLabel->setText("Status: Playing");
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m_statusLabel->setStyleSheet("QLabel { background-color: #90EE90; padding: 5px; border-radius: 3px; }");
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m_startBtn->setEnabled(false);
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m_stopBtn->setEnabled(true);
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}
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void VideoViewerWidget::stopPipeline()
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{
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if (m_pipeline) {
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gst_element_set_state(m_pipeline, GST_STATE_NULL);
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gst_object_unref(m_pipeline);
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m_pipeline = nullptr;
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}
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if (m_videoSink) {
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gst_object_unref(m_videoSink);
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m_videoSink = nullptr;
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}
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if (m_busWatchId > 0) {
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g_source_remove(m_busWatchId);
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m_busWatchId = 0;
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}
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m_statusLabel->setText("Status: Stopped");
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m_statusLabel->setStyleSheet("QLabel { background-color: #f0f0f0; padding: 5px; border-radius: 3px; }");
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m_startBtn->setEnabled(true);
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m_stopBtn->setEnabled(false);
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}
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void VideoViewerWidget::cleanupGStreamer()
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{
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stopPipeline();
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}
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gboolean VideoViewerWidget::busCallback(GstBus* bus, GstMessage* msg, gpointer data)
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{
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VideoViewerWidget* viewer = static_cast<VideoViewerWidget*>(data);
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switch (GST_MESSAGE_TYPE(msg)) {
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case GST_MESSAGE_ERROR: {
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GError* err;
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gchar* debug_info;
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gst_message_parse_error(msg, &err, &debug_info);
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QString errorMsg = QString("GStreamer Error: %1\nDebug: %2")
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.arg(err->message)
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.arg(debug_info ? debug_info : "none");
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qDebug() << "[VideoViewer] ERROR:" << errorMsg;
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QMetaObject::invokeMethod(viewer, [viewer, errorMsg]() {
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viewer->m_statusLabel->setText("Status: Stream Error - " + errorMsg);
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viewer->m_statusLabel->setStyleSheet("QLabel { background-color: #FFB6C1; padding: 5px; border-radius: 3px; }");
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viewer->stopPipeline();
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}, Qt::QueuedConnection);
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g_error_free(err);
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g_free(debug_info);
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break;
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}
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case GST_MESSAGE_EOS:
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qDebug() << "[VideoViewer] End of stream";
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QMetaObject::invokeMethod(viewer, [viewer]() {
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viewer->m_statusLabel->setText("Status: End of Stream");
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viewer->stopPipeline();
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}, Qt::QueuedConnection);
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break;
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case GST_MESSAGE_STATE_CHANGED:
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if (GST_MESSAGE_SRC(msg) == GST_OBJECT(viewer->m_pipeline)) {
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GstState oldState, newState, pendingState;
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gst_message_parse_state_changed(msg, &oldState, &newState, &pendingState);
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qDebug() << "[VideoViewer] State changed:"
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<< gst_element_state_get_name(oldState) << "->"
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<< gst_element_state_get_name(newState);
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}
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break;
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case GST_MESSAGE_WARNING: {
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GError* err;
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gchar* debug_info;
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gst_message_parse_warning(msg, &err, &debug_info);
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qDebug() << "[VideoViewer] WARNING:" << err->message;
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g_error_free(err);
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g_free(debug_info);
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break;
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}
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case GST_MESSAGE_INFO: {
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GError* err;
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gchar* debug_info;
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gst_message_parse_info(msg, &err, &debug_info);
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qDebug() << "[VideoViewer] INFO:" << err->message;
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g_error_free(err);
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g_free(debug_info);
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break;
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}
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default:
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break;
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}
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return TRUE;
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}
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void VideoViewerWidget::onStartViewer()
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{
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startPipeline();
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}
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void VideoViewerWidget::onStopViewer()
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{
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stopPipeline();
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}
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void VideoViewerWidget::onSourceTypeChanged(int index)
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{
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QString sourceType = m_sourceType->currentData().toString();
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bool needsNetwork = (sourceType != "test");
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bool isUdp = (sourceType == "udp-mjpeg" || sourceType == "udp-h264");
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m_hostEdit->setEnabled(needsNetwork && !isUdp);
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m_portEdit->setEnabled(needsNetwork);
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}
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void VideoViewerWidget::onPrepareWindowHandle(GstBus* bus, GstMessage* msg, gpointer data)
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{
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if (!gst_is_video_overlay_prepare_window_handle_message(msg)) {
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return;
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}
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VideoViewerWidget* viewer = static_cast<VideoViewerWidget*>(data);
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if (viewer->m_windowId) {
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GstElement* sink = GST_ELEMENT(GST_MESSAGE_SRC(msg));
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qDebug() << "[VideoViewer] prepare-window-handle: Setting window ID" << viewer->m_windowId;
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gst_video_overlay_set_window_handle(GST_VIDEO_OVERLAY(sink), viewer->m_windowId);
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} else {
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qDebug() << "[VideoViewer] prepare-window-handle: No window ID available yet";
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}
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}
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