player: feed the app with gst logs

Get the debug callback to retrieve the gst logs
and display it in the debug tab.

src/gps/player.rs

@@ -61,6 +61,28 @@ impl PlayerWeak {
     }
 }
 
+fn gst_log_handler(
+    category: gst::DebugCategory,
+    level: gst::DebugLevel,
+    file: &glib::GStr,
+    function: &glib::GStr,
+    line: u32,
+    _obj: Option<&gst::LoggedObject>,
+    message: &gst::DebugMessage,
+) {
+    let log_message = format!(
+        "{}\t{}\t{}:{}:{}\t{}",
+        level,
+        category.name(),
+        line,
+        file.as_str(),
+        function.as_str(),
+        message.get().unwrap().as_str()
+    );
+
+    GPS_GST_LOG!("{}", log_message);
+}
+
 #[derive(Debug)]
 pub struct PlayerInner {
     app: RefCell<Option<GPSApp>>,
@@ -79,7 +101,7 @@ impl Player {
             n_video_sink: Cell::new(0),
             bus_watch_guard: RefCell::new(None),
         }));
-
+        gst::debug_add_log_function(gst_log_handler);
         Ok(pipeline)
     }
 
@@ -105,7 +127,7 @@ impl Player {
         } else {
             ElementInfo::element_update_rank("gtk4paintablesink", gst::Rank::Marginal);
         }
-
+        gst::debug_set_threshold_from_string(settings::Settings::gst_log_level().as_str(), true);
         // Create pipeline from the description
         let pipeline = gst::parse_launch(description)?;
         let pipeline = pipeline.downcast::<gst::Pipeline>();
@@ -282,7 +304,9 @@ impl Player {
 
     fn on_pipeline_message(&self, msg: &gst::MessageRef) {
         use gst::MessageView;
-        GPS_MSG!("{:?}", msg.structure());
+        if let Some(message) = msg.structure() {
+            GPS_MSG_LOG!("{:?}", message);
+        }
         match msg.view() {
             MessageView::Eos(_) => {
                 GPS_INFO!("EOS received");

src/logger.rs

@@ -92,7 +92,7 @@ macro_rules! GPS_DEBUG (
 );
 
 #[macro_export]
-macro_rules! GPS_MSG (
+macro_rules! GPS_MSG_LOG (
     () => ($crate::print!("\n"));
     ($($arg:tt)*) => ({
         logger::pring_msg_logger(logger::LogType::Message, format_args!($($arg)*).to_string());

src/settings.rs

@@ -70,6 +70,16 @@ impl Settings {
         path
     }
 
+    pub fn gst_log_level() -> String {
+        let settings = Settings::load_settings();
+        let binding = "0".to_string();
+        let level = settings
+            .preferences
+            .get("gst_log_level")
+            .unwrap_or(&binding);
+        level.clone()
+    }
+
     pub fn set_recent_pipeline_description(pipeline: &str) {
         let mut settings = Settings::load_settings();
         settings.recent_pipeline = pipeline.to_string();

src/ui/preferences.rs

@@ -82,5 +82,16 @@ pub fn display_settings(app: &GPSApp) {
         dialog.close();
     });
 
+    let widget = gtk::Entry::new();
+    widget.set_text(settings::Settings::gst_log_level().as_str());
+    widget.connect_changed(glib::clone!(@weak widget => move |c| {
+        let mut settings = settings::Settings::load_settings();
+        settings.preferences.insert("gst_log_level".to_string(), c.text().to_string());
+        settings::Settings::save_settings(&settings);
+    }));
+    let widget = widget
+        .dynamic_cast::<gtk::Widget>()
+        .expect("Should be a widget");
+    add_settings_widget(&grid, "GST Log level", &widget, 2);
     dialog.show();
 }