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gtk4: Set sync point on the video frame after mapping it

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Otherwise it is not always ready for use yet in GTK even after waiting
on the sync point, and a fully transparent texture is rendered instead.

Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/issues/320

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1103>
This commit is contained in:
Sebastian Dröge 2023-02-24 11:52:28 +02:00
parent 6bc72e513c
commit bca4af0c79
1 changed files with 10 additions and 4 deletions
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14
video/gtk4/src/sink/frame.rs
View file

@ -251,21 +251,27 @@ impl Frame {
});
if let Some(memory_ctx) = memory_ctx {
let mapped_frame = if let Some(meta) = buffer.meta::<gst_gl::GLSyncMeta>() {
meta.set_sync_point(memory_ctx);
// If there is no GLSyncMeta yet then we need to add one here now, which requires
// obtaining a writable buffer.
let mapped_frame = if buffer.meta::<gst_gl::GLSyncMeta>().is_some() {
gst_video::VideoFrame::from_buffer_readable_gl(buffer.clone(), info)
.map_err(|_| gst::FlowError::Error)?
} else {
let mut buffer = buffer.clone();
{
let buffer = buffer.make_mut();
let meta = gst_gl::GLSyncMeta::add(buffer, memory_ctx);
meta.set_sync_point(memory_ctx);
gst_gl::GLSyncMeta::add(buffer, memory_ctx);
}
gst_video::VideoFrame::from_buffer_readable_gl(buffer, info)
.map_err(|_| gst::FlowError::Error)?
};
// Now that it's guaranteed that there is a sync meta and the frame is mapped, set
// a sync point so we can ensure that the texture is ready later when making use of
// it as gdk::GLTexture.
let meta = mapped_frame.buffer().meta::<gst_gl::GLSyncMeta>().unwrap();
meta.set_sync_point(memory_ctx);
frame = Self {
frame: mapped_frame,
overlays: vec![],