fix(iced-video): Fix the very high ram usage

feat(playback): add GstPlayFlags for playbin and playbin3

gst/src/plugins/playback/playbin.rs

@@ -0,0 +1,82 @@
+use crate::priv_prelude::*;
+
+wrap_gst!(Playbin, gstreamer::Element);
+parent_child!(Element, Playbin);
+parent_child!(Pipeline, Playbin, downcast);
+parent_child!(Bin, Playbin, downcast);
+
+impl Drop for Playbin {
+    fn drop(&mut self) {
+        self.set_state(gstreamer::State::Null).ok();
+    }
+}
+
+impl Playbin {
+    pub fn new(name: impl AsRef<str>) -> Result<Self> {
+        gstreamer::ElementFactory::make("playbin3")
+            .name(name.as_ref())
+            .build()
+            .map(|element| Playbin { inner: element })
+            .change_context(Error)
+    }
+
+    pub fn with_uri(self, uri: impl AsRef<str>) -> Self {
+        self.inner.set_property("uri", uri.as_ref());
+        self
+    }
+
+    pub fn with_buffer_duration(self, duration: impl Into<Option<core::time::Duration>>) -> Self {
+        let duration = match duration.into() {
+            Some(dur) => dur.as_secs() as i64,
+            None => -1,
+        };
+        self.inner.set_property("buffer-duration", duration);
+        self
+    }
+
+    pub fn with_buffer_size(self, size: impl Into<Option<u32>>) -> Self {
+        let size = match size.into() {
+            Some(size) => size as i32,
+            None => -1,
+        };
+        self.inner.set_property("buffer-size", size);
+        self
+    }
+
+    /// Sets the maximum size of the ring buffer in bytes.
+    pub fn with_ring_buffer_max_size(self, size: u64) -> Self {
+        self.inner.set_property("ring-buffer-max-size", size);
+        self
+    }
+
+    pub fn with_video_sink(self, video_sink: &impl ChildOf<Element>) -> Self {
+        self.inner
+            .set_property("video-sink", &video_sink.upcast_ref().inner);
+        self
+    }
+
+    pub fn with_text_sink(self, text_sink: &impl ChildOf<Element>) -> Self {
+        self.inner
+            .set_property("text-sink", &text_sink.upcast_ref().inner);
+        self
+    }
+
+    pub fn with_audio_sink(self, audio_sink: &impl ChildOf<Element>) -> Self {
+        self.inner
+            .set_property("audio-sink", &audio_sink.upcast_ref().inner);
+        self
+    }
+
+    pub fn set_volume(&self, volume: f64) {
+        self.inner.set_property("volume", volume.clamp(1.0, 100.0))
+    }
+
+    pub fn get_volume(&self) -> f64 {
+        self.inner.property::<f64>("volume")
+    }
+
+    pub fn with_flags(self, flags: playback::PlayFlags) -> Self {
+        self.inner.set_property("flags", flags);
+        self
+    }
+}