enhance the separation

src/librssguard/gui/mediaplayer/libmpv/libmpvbackend.cpp

@@ -34,15 +34,6 @@
 #define CONFIG_MAIN_NAME  "mpv.conf"
 #define CONFIG_INPUT_NAME "input.conf"
 
-static void wakeup(void* ctx) {
-  // This callback is invoked from any mpv thread (but possibly also
-  // recursively from a thread that is calling the mpv API). Just notify
-  // the Qt GUI thread to wake up (so that it can process events with
-  // mpv_wait_event()), and return as quickly as possible.
-  LibMpvBackend* backend = (LibMpvBackend*)ctx;
-  emit backend->launchMpvEvents();
-}
-
 LibMpvBackend::LibMpvBackend(Application* app, QWidget* parent)
   : PlayerBackend(app, parent), m_mpvContainer(nullptr), m_mpvHandle(nullptr) {
   installEventFilter(this);
@@ -100,14 +91,12 @@ LibMpvBackend::LibMpvBackend(Application* app, QWidget* parent)
   // From this point on, the wakeup function will be called. The callback
   // can come from any thread, so we use the QueuedConnection mechanism to
   // relay the wakeup in a thread-safe way.
-  connect(this,
+  connect(m_mpvContainer,
-          &LibMpvBackend::launchMpvEvents,
+          &LibMpvWidget::launchMpvEvents,
           this,
           &LibMpvBackend::onMpvEvents,
           Qt::ConnectionType::QueuedConnection);
 
-  mpv_set_wakeup_callback(m_mpvHandle, wakeup, this);
-
   if (mpv_initialize(m_mpvHandle) < 0) {
     qFatal("cannot create mpv instance");
   }

src/librssguard/gui/mediaplayer/libmpv/libmpvbackend.h

@@ -39,9 +39,6 @@ class LibMpvBackend : public PlayerBackend {
   private slots:
     void onMpvEvents();
 
-  signals:
-    void launchMpvEvents();
-
   private:
     void processEndFile(mpv_event_end_file* end_file);
     void processTracks(const QJsonDocument& json);

src/librssguard/gui/mediaplayer/libmpv/libmpvwidget.cpp

@@ -4,6 +4,15 @@
 
 #include <mpv/client.h>
 
+static void wakeup(void* ctx) {
+  // This callback is invoked from any mpv thread (but possibly also
+  // recursively from a thread that is calling the mpv API). Just notify
+  // the Qt GUI thread to wake up (so that it can process events with
+  // mpv_wait_event()), and return as quickly as possible.
+  LibMpvWidget* backend = (LibMpvWidget*)ctx;
+  emit backend->launchMpvEvents();
+}
+
 LibMpvWidget::LibMpvWidget(mpv_handle* mpv_handle, QWidget* parent) : QWidget(parent), m_mpvHandle(mpv_handle) {
   setAttribute(Qt::WidgetAttribute::WA_DontCreateNativeAncestors);
   setAttribute(Qt::WidgetAttribute::WA_NativeWindow);
@@ -22,4 +31,6 @@ void LibMpvWidget::bind() {
 #endif
 
   mpv_set_option(m_mpvHandle, "wid", MPV_FORMAT_INT64, &wid);
+
+  mpv_set_wakeup_callback(m_mpvHandle, wakeup, this);
 }

src/librssguard/gui/mediaplayer/libmpv/libmpvwidget.h

@@ -16,6 +16,7 @@ class LibMpvWidget : public QWidget {
     void bind();
 
   signals:
+    void launchMpvEvents();
 
   private:
     mpv_handle* m_mpvHandle;