feat: Added PipelineExt trait for all Children of Pipelines

gst/src/plugins/playback/playbin3.rs

@@ -13,7 +13,6 @@ impl Drop for Playbin3 {
 
 impl Playbin3 {
     pub fn new(name: impl AsRef<str>) -> Result<Self> {
-        use gstreamer::prelude::*;
         gstreamer::ElementFactory::make("playbin3")
             .name(name.as_ref())
             .build()
@@ -22,51 +21,33 @@ impl Playbin3 {
     }
 
     pub fn with_uri(self, uri: impl AsRef<str>) -> Self {
-        use gstreamer::prelude::*;
         self.inner.set_property("uri", uri.as_ref());
         self
     }
 
     pub fn with_video_sink(self, video_sink: &impl ChildOf<Element>) -> Self {
-        use gstreamer::prelude::*;
         self.inner
             .set_property("video-sink", &video_sink.upcast_ref().inner);
         self
     }
 
     pub fn with_text_sink(self, text_sink: &impl ChildOf<Element>) -> Self {
-        use gstreamer::prelude::*;
         self.inner
             .set_property("text-sink", &text_sink.upcast_ref().inner);
         self
     }
 
     pub fn with_audio_sink(self, audio_sink: &impl ChildOf<Element>) -> Self {
-        use gstreamer::prelude::*;
         self.inner
             .set_property("audio-sink", &audio_sink.upcast_ref().inner);
         self
     }
 
     pub fn set_volume(&self, volume: f64) {
-        use gstreamer::prelude::*;
         self.inner.set_property("volume", volume.clamp(1.0, 100.0))
     }
 
     pub fn get_volume(&self) -> f64 {
-        use gstreamer::prelude::*;
         self.inner.property::<f64>("volume")
     }
 }
-
-impl core::ops::Deref for Playbin3 {
-    type Target = Pipeline;
-
-    fn deref(&self) -> &Self::Target {
-        let gp = self
-            .inner
-            .downcast_ref::<gstreamer::Pipeline>()
-            .expect("BUG: Playbin3 must be a pipeline");
-        unsafe { &*(gp as *const _ as *const Pipeline) }
-    }
-}