uriplaylistbin: rely on new uridecodebin3 gapless logic

uridecodebin3 can now properly handle gapless switches so use that
instead of our own very complicated logic.

Fix #268
Fix #193

Depends on gst 1.23.90 as the plugin requires recent fixes to work properly.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1471>

meson.build

@@ -170,6 +170,7 @@ plugins = {
     'library': 'libgsturiplaylistbin',
     'examples': ['playlist'],
     'features': ['clap'],
+    'gst-version': '>=1.23.90',
   },
 
   'cdg': {'library': 'libgstcdg'},
@@ -397,6 +398,18 @@ foreach plugin_name, details: plugins
         endif
       endforeach
     endif
+    if details.has_key('gst-version')
+      # Check if we have the required GStreamer version
+      gst_version = details.get('gst-version', '')
+      dep = dependency('gstreamer-1.0', required: false, version: gst_version)
+      if not dep.found()
+        opt = get_option(plugin_name)
+        if opt.enabled()
+          error('Required GStreamer version not found to build ' + plugin_name)
+        endif
+        plugin_deps_found = false
+      endif
+    endif
     if plugin_deps_found
       packages += f'gst-plugin-@plugin_name@'
       features += plugin_features

utils/uriplaylistbin/Cargo.toml

@@ -9,7 +9,7 @@ description = "GStreamer Playlist Playback Plugin"
 rust-version.workspace = true
 
 [dependencies]
-gst.workspace = true
+gst = { workspace = true, features = ["v1_24"] }
 anyhow = "1"
 clap = { version = "4", optional = true, features = ["derive"] }
 thiserror = "1"

utils/uriplaylistbin/tests/uriplaylistbin.rs

@@ -135,9 +135,21 @@ fn test(
                 break;
             }
             // check stream related messages
-            MessageView::StreamCollection(_) | MessageView::StreamsSelected(_) => {
+            MessageView::StreamCollection(sc) => {
+                if let Some(prev) = events.last() {
+                    if let MessageView::StreamCollection(prev_sc) = prev.view() {
+                        if prev_sc.src() == sc.src()
+                            && prev_sc.stream_collection() == sc.stream_collection()
+                        {
+                            // decodebin3 may send twice the same collection
+                            continue;
+                        }
+                    }
+                }
+
                 events.push(msg.clone())
             }
+            MessageView::StreamsSelected(_) => events.push(msg.clone()),
             _ => {}
         }
     }
@@ -174,12 +186,15 @@ fn test(
         // check stream-collection and streams-selected message ordering
         let mut events = events.clone().into_iter();
 
-        for _ in 0..playlist_len {
+        for i in 0..playlist_len {
             let decodebin = assert_stream_collection(events.next().unwrap(), n_streams as usize);
-            assert_eq!(
-                assert_stream_selected(events.next().unwrap(), n_streams as usize),
-                decodebin
-            );
+            if i == 0 {
+                // decodebin3 sends StreamSelected only once, which is ok as the selected stream stays the same
+                assert_eq!(
+                    assert_stream_selected(events.next().unwrap(), n_streams as usize),
+                    decodebin
+                );
+            }
         }
     }