[writer] thread

writer.cpp

@@ -0,0 +1,43 @@
+#include "writer.h"
+
+void Writer::setVideoSpecs(VideoSpecs specs) {
+  videoSpecs = specs;
+  valid = true;
+}
+
+void Writer::run() {
+  if (valid) {
+      stop_request = false;
+      Pylon::CVideoWriter videoWriter;
+      videoWriter.SetParameter(videoSpecs.width, videoSpecs.height, videoSpecs.pixelType,
+                               videoSpecs.fps, videoSpecs.quality);
+      videoWriter.Open(videoSpecs.filename.c_str());
+      MyImage img;
+      int64_t count = 0;
+      while (!stop_request || buffer->bufferLoad() > 0) {
+          std::cerr << "running!\n";
+          if (buffer->bufferLoad() > 0 ) {
+              bool valid = buffer->pop(img);
+              if (valid) {
+                  count ++;
+                  Pylon::CPylonImage pyImage;
+                  try {
+                    pyImage.AttachUserBuffer(img.data(), videoSpecs.width * videoSpecs.height, videoSpecs.pixelType, videoSpecs.width, videoSpecs.height, 0, videoSpecs.orientation);
+                    videoWriter.Add( pyImage );
+                  }  catch (const Pylon::GenericException &e) {
+                    std::cerr << "An exception occurred." << std::endl << e.GetDescription() << std::endl;
+                  }
+              }
+          } else {
+            while (buffer->bufferLoad() < 5 && !stop_request) {
+              msleep(10);
+              std::cerr << "waiting.." << buffer->bufferLoad() << std::endl;
+            }
+          }
+        }
+      videoWriter.Close();
+      std::cerr << "writer terminated: " << count << std::endl;
+    } else {
+      std::cerr << "Got no video specifications, not writing!" << std::endl;
+    }
+}

writer.h

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+#ifndef WRITER_H
+#define WRITER_H
+
+#include <QObject>
+#include <QThread>
+#include <pylon/PylonIncludes.h>
+#include "pylonwrapper.h"
+#include "imagebuffer.h"
+
+struct VideoSpecs {
+  std::string filename;
+  uint32_t width, height, quality = 95;
+  int fps;
+  Pylon::EPixelType pixelType;
+  Pylon::EImageOrientation orientation;
+};
+
+class Writer : public QThread
+{
+  Q_OBJECT
+public:
+  explicit Writer(ImageBuffer*buffer, QObject *parent = nullptr) :
+    QThread(parent), buffer(buffer) {}
+
+   void setVideoSpecs(VideoSpecs specs);
+   void run() override;
+   void stop();
+
+private:
+  ImageBuffer *buffer;
+  VideoSpecs videoSpecs;
+  bool stop_request = false;
+  bool valid = false;
+
+public slots:
+  void requestStop() {
+    stop_request=true;
+  }
+
+signals:
+  void terminated();
+};
+
+#endif // WRITER_H