vo_dmabuf_wayland: wayland VO displaying dmabuf buffers

Wayland VO that can display images from either vaapi or drm hwdec

The PR adds the following changes:

1. a context_wldmabuf context with no gl dependencies
2. no-op ra_wldmabuf and dmabuf_interop_wldmabuf objects
   no-op because there is no need to map/unmap the drmprime buffer,
    and there is no need to manage any textures.

Tested on both x86_64 and rk3399 AArch64

3 files changed, 110 insertions, 0 deletions

diff --git a/video/out/wldmabuf/context_wldmabuf.c b/video/out/wldmabuf/context_wldmabuf.c
new file mode 100644
index 0000000000..a22cb2bf44
--- /dev/null
+++ b/video/out/wldmabuf/context_wldmabuf.c
@@ -0,0 +1,44 @@
+/*
+ * This file is part of mpv video player.
+ *
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * mpv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "video/out/wayland_common.h"
+#include "video/out/opengl/context.h"
+#include "ra_wldmabuf.h"
+
+static void uninit(struct ra_ctx *ctx)
+{
+    ra_free(&ctx->ra);
+    vo_wayland_uninit(ctx->vo);
+}
+
+static bool init(struct ra_ctx *ctx)
+{
+    if (!vo_wayland_init(ctx->vo)) {
+        vo_wayland_uninit(ctx->vo);
+        return false;
+    }
+    ctx->ra = ra_create_wayland(ctx->log, ctx->vo->wl->display);
+
+    return true;
+}
+
+const struct ra_ctx_fns ra_ctx_wldmabuf = {
+    .type               = "none",
+    .name               = "wldmabuf",
+    .init               = init,
+    .uninit             = uninit,
+};
diff --git a/video/out/wldmabuf/ra_wldmabuf.c b/video/out/wldmabuf/ra_wldmabuf.c
new file mode 100644
index 0000000000..8b59bd4a07
--- /dev/null
+++ b/video/out/wldmabuf/ra_wldmabuf.c
@@ -0,0 +1,44 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * mpv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "video/out/wayland_common.h"
+#include "video/out/gpu/ra.h"
+#include "ra_wldmabuf.h"
+
+static void destroy(struct ra *ra)
+{
+}
+
+static struct ra_fns ra_fns_wldmabuf = {
+    .destroy                = destroy,
+};
+
+struct ra *ra_create_wayland(struct mp_log *log, struct wl_display *display)
+{
+    struct ra *ra =  talloc_zero(NULL, struct ra);
+
+    ra->fns = &ra_fns_wldmabuf;
+    ra->log = log;
+    ra_add_native_resource(ra, "wl", display);
+
+    return ra;
+}
+
+bool ra_is_wldmabuf(struct ra *ra)
+{
+    return (ra->fns == &ra_fns_wldmabuf);
+}
diff --git a/video/out/wldmabuf/ra_wldmabuf.h b/video/out/wldmabuf/ra_wldmabuf.h
new file mode 100644
index 0000000000..231b4c3ce8
--- /dev/null
+++ b/video/out/wldmabuf/ra_wldmabuf.h
@@ -0,0 +1,22 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * mpv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include "video/out/wayland_common.h"
+
+struct ra *ra_create_wayland(struct mp_log *log, struct wl_display *display);
+bool ra_is_wldmabuf(struct ra *ra);