check if video is set

src/main_window.cpp

@@ -845,7 +845,7 @@ void AC_MainWindow::comboFilterChanged(int) {
     Log(str);
     std::string text = filters->currentText().toStdString();
     
-    if(ac::v_cap.isOpened() == false && text.find("Video") != std::string::npos) {
+    if(playback->videoIsOpen() == false && text.find("Video") != std::string::npos) {
         Log(tr("Set a video file to use this filter"));
     }
     

src/playback_thread.cpp

@@ -37,6 +37,7 @@ bool Playback::VideoRelease() {
     if(ac::v_cap.isOpened()) {
         ac::v_cap.release();
         ret = true;
+        video_is_set = false;
     }
     mutex.unlock();
     return ret;
@@ -133,14 +134,20 @@ bool Playback::setVideoCamera(std::string name, int type, int device, int res, c
     return true;
 }
 
+bool Playback::videoIsOpen() {
+    return video_is_set;
+}
+
 bool Playback::openVideo(std::string vname) {
     mutex.lock();
     ac::v_cap.open(vname);
     if(ac::v_cap.isOpened() == false) {
         mutex.unlock();
+        video_is_set = false;
         return false;
     }
     mutex.unlock();
+    video_is_set = true;
     return true;
 }
 void Playback::setVector(std::vector<FilterValue> v) {

src/playback_thread.h

@@ -19,6 +19,7 @@ class Playback : public QThread {
 private:
     std::atomic<bool> stop;
     std::atomic<bool> video_shown;
+    std::atomic<bool> video_is_set;
     QMutex mutex, mutex_shown, mutex_add;
     QWaitCondition condition;
     cv::Mat frame;
@@ -62,6 +63,7 @@ private:
 public:
     Playback(QObject *parent = 0);
     ~Playback();
+    bool videoIsOpen();
     void setFadeFilter(bool f);
     void setFrameIndex(const long &index);
     bool getFrame(QImage &img, const int &index);