waylandsink: rework the mechanism for keeping buffers out of the pool until wl_buffer::release

This also removes the GstWlMeta and adds a wrapper class for wl_buffer
which is saved in the GstBuffer qdata instead of being a GstMeta.

The motivation behind this is mainly to allow attaching wl_buffers on
GstBuffers that have not been allocated inside the GstWaylandBufferPool,
so that if for example an upstream element is sending us a buffer
from a different pool, which however does not need to be copied
to a buffer from our pool because it may be a hardware buffer
(hello dmabuf!), we can create a wl_buffer directly from it and first,
attach it on it so that we don't have to re-create a wl_buffer every
time the same GstBuffer arrives and second, force the whole mechanism
for keeping the buffer out of the pool until there is a wl_buffer::release
on that foreign GstBuffer.

1 files changed, 4 insertions, 0 deletions

diff --git a/ext/wayland/Makefile.am b/ext/wayland/Makefile.am
index 58c1e99e1..73aae2cd4 100644
--- a/ext/wayland/Makefile.am
+++ b/ext/wayland/Makefile.am
@@ -3,6 +3,7 @@ plugin_LTLIBRARIES = libgstwaylandsink.la
 libgstwaylandsink_la_SOURCES =  \
 	gstwaylandsink.c \
 	waylandpool.c \
+	wlbuffer.c \
 	wldisplay.c \
 	wlwindow.c \
 	wlvideoformat.c \
@@ -21,6 +22,7 @@ libgstwaylandsink_la_LIBTOOLFLAGS = $(GST_PLUGIN_LIBTOOLFLAGS)
 noinst_HEADERS = \
 	gstwaylandsink.h \
 	waylandpool.h \
+	wlbuffer.h \
 	wldisplay.h \
 	wlwindow.h \
 	wlvideoformat.h \
@@ -39,6 +41,8 @@ gstwaylandsink.c: scaler-client-protocol.h
 
 waylandpool.c: scaler-client-protocol.h
 
+wlbuffer.c: scaler-client-protocol.h
+
 wldisplay.c: scaler-client-protocol.h
 
 wlwindow.c: scaler-client-protocol.h