Waylandsink: Workaround for partial frame delay artifacts

Some test cases results in partial frame delay because
buffers are reused while its displayed. This patch ensures
that current buffers is available only when you receive a
new buffer.

Signed-off-by: Pooja Prajod <a0132412@ti.com>

2 files changed, 8 insertions, 0 deletions

diff --git a/ext/wayland/gstwaylandsink.c b/ext/wayland/gstwaylandsink.c
index bb7d838..0ef1ef8 100644
--- a/ext/wayland/gstwaylandsink.c
+++ b/ext/wayland/gstwaylandsink.c
@@ -311,6 +311,9 @@ gst_wayland_sink_finalize (GObject * object)
     sink->wlbufferpriv = NULL;
   }
 
+  gst_buffer_replace (&sink->last_buf, NULL);
+  gst_buffer_replace (&sink->display_buf, NULL);
+
   g_mutex_clear (&sink->wayland_lock);
 
   G_OBJECT_CLASS (parent_class)->finalize (object);
@@ -862,6 +865,9 @@ gst_wayland_sink_render (GstBaseSink * bsink, GstBuffer * buffer)
   wl_surface_commit (window->surface);
   wl_display_dispatch (display->display);
 
+  gst_buffer_replace (&sink->last_buf, sink->display_buf);
+  gst_buffer_replace (&sink->display_buf, to_render);
+
   if (buffer != to_render)
     gst_buffer_unref (to_render);
   return GST_FLOW_OK;
diff --git a/ext/wayland/gstwaylandsink.h b/ext/wayland/gstwaylandsink.h
index b3fbbac..b3cef2a 100644
--- a/ext/wayland/gstwaylandsink.h
+++ b/ext/wayland/gstwaylandsink.h
@@ -121,6 +121,8 @@ struct _GstWaylandSink
 
   gint video_width;
   gint video_height;
+  /* current displayed buffer and last displayed buffer: */
+  GstBuffer *display_buf, *last_buf;
   uint32_t format;
 };