QtPlayer input

example/QtPlayer/mainwindow.cpp

@@ -15,7 +15,9 @@ MainWindow::MainWindow(QWidget* parent)
 {
     ui->setupUi(this);
 
-    _frameProvider.Start();
+    //_frameProvider.Start();
+
+    ui->button->setText("Start");
 
     connect(&_frameProvider, &frame_grabber::QFrameProvider::SendFrame, this, &MainWindow::OnRcvFrame);
 }
@@ -28,7 +30,7 @@ MainWindow::~MainWindow()
 
 void MainWindow::OnRcvFrame(cv::Mat frame)
 {
-    qDebug() << "MainWindow::OnRcvFrame";
+    // qDebug() << "MainWindow::OnRcvFrame";
 
     if (frame.size() == cv::Size { 0, 0 })
     {
@@ -41,3 +43,22 @@ void MainWindow::OnRcvFrame(cv::Mat frame)
     ui->label->setPixmap(
         QPixmap::fromImage(frame_grabber::utils::CvMat2QImage(frame)).scaled(ui->label->size(), Qt::KeepAspectRatio));
 }
+
+void MainWindow::on_button_clicked()
+{
+    qDebug() << "MainWindow::on_button_clicked";
+
+    auto input = ui->lineEdit->text();
+
+    QRegExp re("\\d*");
+    if (re.exactMatch(input))
+    {
+        bool isInt { false };
+        int src = input.toInt(&isInt);
+        if (isInt)
+            _frameProvider.Start(src);
+        return;
+    }
+
+    _frameProvider.Start(input.toStdString());
+}

example/QtPlayer/mainwindow.h

@@ -3,7 +3,6 @@
 
 #include <qframgrabber/QFrameProvider.hpp>
 
-#include <QLabel>
 #include <QLayout>
 #include <QMainWindow>
 
@@ -28,6 +27,8 @@ public slots:
 
     void OnRcvFrame(cv::Mat);
 
+    void on_button_clicked();
+
 private:
     Ui::MainWindow* ui;
 

example/QtPlayer/mainwindow.ui

@@ -16,6 +16,20 @@
   <widget class="QWidget" name="centralwidget">
    <layout class="QGridLayout" name="gridLayout">
     <item row="0" column="0">
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="QLineEdit" name="lineEdit"/>
+      </item>
+      <item>
+       <widget class="QPushButton" name="button">
+        <property name="text">
+         <string>PushButton</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+    <item row="1" column="0">
      <widget class="QLabel" name="label">
       <property name="text">
        <string>TextLabel</string>

lib/include/qframgrabber/MetaUtils.hpp

@@ -0,0 +1,33 @@
+#pragma once
+
+namespace frame_grabber::meta::utils
+{
+/// {@
+/// \brief Overload pattern for std::visit
+template<class... Ts>
+struct Overload : Ts...
+{
+    using Ts::operator()...;
+};
+
+template<class... Ts>
+Overload(Ts...) -> Overload<Ts...>;
+/// @}
+
+/*!
+\code{.cpp}
+
+const std::variant<int, bool> v{true};
+
+std::visit(
+  Overload{
+      [](int val) { std::cout << val; },
+      [](bool val) { std::cout << std::boolalpha << val; },
+  },
+  v);
+
+\endcode
+
+ */
+
+} // namespace videostreamer::meta::utils

lib/include/qframgrabber/QFrameProvider.hpp

@@ -22,6 +22,10 @@ class QFrameProvider final : public QThread
     bool Start();
     void Stop();
 
+    bool IsWorking() const noexcept;
+
+    bool Start(InputInfo&& inputInfo);
+
 signals:
     void SendFrame(cv::Mat);
 

lib/include/qframgrabber/Types.hpp

@@ -4,9 +4,7 @@
 #include <string>
 #include <variant>
 
-
-
 namespace frame_grabber
 {
-using InputInfo = std::variant<int32_t, std::string>;
+using InputInfo = std::variant<std::monostate, int32_t, std::string>;
 } // namespace frame_grabber

lib/src/FrameGrabberImpl.cpp

@@ -1,5 +1,7 @@
 #include "FrameGrabberImpl.hpp"
 
+#include <qframgrabber/MetaUtils.hpp>
+
 #include <iostream>
 
 namespace
@@ -16,6 +18,15 @@ FrameGrabberImpl::FrameGrabberImpl(InputInfo inputInfo)
 {
 }
 
+FrameGrabberImpl::FrameGrabberImpl() {}
+
+bool FrameGrabberImpl::Start(InputInfo&& inputInfo)
+{
+    Stop();
+    _inputInfo = std::move(inputInfo);
+    return Start();
+}
+
 FrameGrabberImpl::~FrameGrabberImpl()
 {
     Stop();
@@ -76,18 +87,19 @@ void FrameGrabberImpl::Worker()
 
 bool FrameGrabberImpl::Reconnect()
 {
-    return std::visit(
-        [this](const auto& input) -> bool
-        {
-            _videoCapture.release();
-
-            if (_videoCapture.open(input))
-                return true;
-
-            std::cerr << "FrameGrabberImpl::Reconnect unable to open: " << input << std::endl;
-            return false;
-        },
-        _inputInfo);
+    return std::visit(meta::utils::Overload { [this](const auto& input) -> bool
+                                              {
+                                                  _videoCapture.release();
+
+                                                  if (_videoCapture.open(input))
+                                                      return true;
+
+                                                  std::cerr << "FrameGrabberImpl::Reconnect unable to open: " << input
+                                                            << std::endl;
+                                                  return false;
+                                              },
+                                              [](std::monostate) { return false; } },
+                      _inputInfo);
 }
 } // namespace frame_grabber::impl
 

lib/src/FrameGrabberImpl.hpp

@@ -17,10 +17,13 @@ class FrameGrabberImpl final
 
 public:
     explicit FrameGrabberImpl(InputInfo inputInfo);
+    explicit FrameGrabberImpl();
     ~FrameGrabberImpl();
+
     void SetBuffer(BufferT buffer);
 
     bool Start();
+    bool Start(InputInfo&& inputInfo);
     void Stop();
 
 private:

lib/src/QFrameProvider.cpp

@@ -49,4 +49,23 @@ void QFrameProvider::Stop()
     this->wait();
 }
 
+bool QFrameProvider::IsWorking() const noexcept
+{
+    return _isWorking;
+}
+
+bool QFrameProvider::Start(InputInfo&& inputInfo)
+{
+    if (!_frameGrabber || !_buffer)
+        return false;
+
+    _frameGrabber->SetBuffer(_buffer);
+    _isWorking = true;
+    if (_frameGrabber->Start(std::move(inputInfo)))
+    {
+        start();
+    }
+    return false;
+}
+
 } // namespace frame_grabber