Try to fix crashes when creating and deleting MPV

Try to fix #6 (closed) and #5

src/UI/DocumentViews/MpvContainer.cc

@@ -19,6 +19,14 @@ MpvContainer::MpvContainer(QWidget *parent)
 
     setAttribute(Qt::WA_DontCreateNativeAncestors);
     setAttribute(Qt::WA_NativeWindow);
+}
+
+void
+MpvContainer::intializeMpv()
+{
+    if (isMpvAlreadyInitialized)
+        throw std::logic_error("MPV is already initialized!");
+    isMpvAlreadyInitialized = true;
 
     quint64 wid = winId();
     mpv_set_option(mpv, "wid", MPV_FORMAT_INT64, &wid);
@@ -64,12 +72,13 @@ MpvContainer::closeMpv() noexcept
 {
     if (mpv) {
         qDebug() << "Closing the MPV context";
-        asyncCommand(AsyncCmdType::None, { "quit", nullptr });
         registerMpvTimeCallback(nullptr);
         registerMpvDurationCallback(nullptr);
         mpv_handle *tmp_mpv = mpv;
         mpv                 = nullptr; // Stop all other callbacks here
-        mpv_terminate_destroy(tmp_mpv);
+        mpv_destroy(tmp_mpv);
+        // mpv_wait_async_requests(tmp_mpv);
+        // mpv_terminate_destroy(tmp_mpv);
     }
 }