Revert "perf: use dmabuf if possible"

This reverts commit 8cb96a0.

Dmabuf path is never crossed due to videoflip.

src/pipeline.rs

@@ -269,11 +269,9 @@ pub fn make_videosrc_bin(
     let videorate_capsfilter = gst::ElementFactory::make("capsfilter")
         .property(
             "caps",
-            &optional_dmabuf_feature_caps(
-                gst::Structure::builder("video/x-raw")
-                    .field("framerate", framerate)
-                    .build(),
-            ),
+            gst::Caps::builder("video/x-raw")
+                .field("framerate", framerate)
+                .build(),
         )
         .build()?;
     bin.add_many([&videorate, &videorate_capsfilter])?;
@@ -297,10 +295,7 @@ pub fn make_videosrc_bin(
                 let pipewiresrc = make_pipewiresrc(fd, &stream.node_id().to_string())?;
                 let videoflip = make_videoflip()?;
                 bin.add_many([&pipewiresrc, &videoflip])?;
-                pipewiresrc.link_filtered(
-                    &videoflip,
-                    &optional_dmabuf_feature_caps(gst::Structure::builder("video/x-raw").build()),
-                )?;
+                pipewiresrc.link(&videoflip)?;
 
                 let compositor_sink_pad = compositor
                     .request_pad_simple("sink_%u")
@@ -415,23 +410,6 @@ fn make_audiosrc_bin<'a>(
     Ok(bin)
 }
 
-/// Creates a caps with the given structure and adds the same structure but with `memory:DMABuf` feature.
-fn optional_dmabuf_feature_caps(original: gst::Structure) -> gst::Caps {
-    let dmabuf_feature = gst::CapsFeatures::new(["memory:DMABuf"]);
-
-    let with_dma_drm_format = {
-        let mut s = original.clone();
-        s.set("format", "DMA_DRM");
-        s
-    };
-
-    gst::Caps::builder_full()
-        .structure_with_features(with_dma_drm_format, dmabuf_feature.clone())
-        .structure_with_features(original.clone(), dmabuf_feature)
-        .structure(original)
-        .build()
-}
-
 fn round_to_even(number: i32) -> i32 {
     number / 2 * 2
 }