1 /* GStreamer Wayland video sink
3 * Copyright (C) 2011 Intel Corporation
4 * Copyright (C) 2011 Sreerenj Balachandran <sreerenj.balachandran@intel.com>
5 * Copyright (C) 2012 Wim Taymans <wim.taymans@gmail.com>
6 * Copyright (C) 2014 Collabora Ltd.
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the Free
20 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301 USA.
25 * SECTION:element-waylandsink
27 * The waylandsink is creating its own window and render the decoded video frames to that.
28 * Setup the Wayland environment as described in
29 * <ulink url="http://wayland.freedesktop.org/building.html">Wayland</ulink> home page.
30 * The current implementaion is based on weston compositor.
33 * <title>Example pipelines</title>
35 * gst-launch -v videotestsrc ! waylandsink
36 * ]| test the video rendering in wayland
44 #include "gstwaylandsink.h"
45 #include "wlvideoformat.h"
46 #include "waylandpool.h"
48 #include <gst/wayland/wayland.h>
49 #include <gst/video/videooverlay.h>
65 GST_DEBUG_CATEGORY (gstwayland_debug);
66 #define GST_CAT_DEFAULT gstwayland_debug
68 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
71 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE
72 ("{ BGRx, BGRA, RGBx, xBGR, xRGB, RGBA, ABGR, ARGB, RGB, BGR, "
73 "RGB16, BGR16, YUY2, YVYU, UYVY, AYUV, NV12, NV21, NV16, "
74 "YUV9, YVU9, Y41B, I420, YV12, Y42B, v308 }"))
77 static void gst_wayland_sink_get_property (GObject * object,
78 guint prop_id, GValue * value, GParamSpec * pspec);
79 static void gst_wayland_sink_set_property (GObject * object,
80 guint prop_id, const GValue * value, GParamSpec * pspec);
81 static void gst_wayland_sink_finalize (GObject * object);
83 static GstStateChangeReturn gst_wayland_sink_change_state (GstElement * element,
84 GstStateChange transition);
85 static void gst_wayland_sink_set_context (GstElement * element,
86 GstContext * context);
88 static GstCaps *gst_wayland_sink_get_caps (GstBaseSink * bsink,
90 static gboolean gst_wayland_sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
91 static gboolean gst_wayland_sink_preroll (GstBaseSink * bsink,
94 gst_wayland_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query);
95 static gboolean gst_wayland_sink_render (GstBaseSink * bsink,
98 /* VideoOverlay interface */
99 static void gst_wayland_sink_videooverlay_init (GstVideoOverlayInterface *
101 static void gst_wayland_sink_set_window_handle (GstVideoOverlay * overlay,
103 static void gst_wayland_sink_set_render_rectangle (GstVideoOverlay * overlay,
104 gint x, gint y, gint w, gint h);
105 static void gst_wayland_sink_expose (GstVideoOverlay * overlay);
107 /* WaylandVideo interface */
108 static void gst_wayland_sink_waylandvideo_init (GstWaylandVideoInterface *
110 static void gst_wayland_sink_pause_rendering (GstWaylandVideo * video);
111 static void gst_wayland_sink_resume_rendering (GstWaylandVideo * video);
113 #define gst_wayland_sink_parent_class parent_class
114 G_DEFINE_TYPE_WITH_CODE (GstWaylandSink, gst_wayland_sink, GST_TYPE_VIDEO_SINK,
115 G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_OVERLAY,
116 gst_wayland_sink_videooverlay_init)
117 G_IMPLEMENT_INTERFACE (GST_TYPE_WAYLAND_VIDEO,
118 gst_wayland_sink_waylandvideo_init));
121 gst_wayland_sink_class_init (GstWaylandSinkClass * klass)
123 GObjectClass *gobject_class;
124 GstElementClass *gstelement_class;
125 GstBaseSinkClass *gstbasesink_class;
127 gobject_class = (GObjectClass *) klass;
128 gstelement_class = (GstElementClass *) klass;
129 gstbasesink_class = (GstBaseSinkClass *) klass;
131 gobject_class->set_property = gst_wayland_sink_set_property;
132 gobject_class->get_property = gst_wayland_sink_get_property;
133 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_wayland_sink_finalize);
135 gst_element_class_add_pad_template (gstelement_class,
136 gst_static_pad_template_get (&sink_template));
138 gst_element_class_set_static_metadata (gstelement_class,
139 "wayland video sink", "Sink/Video",
140 "Output to wayland surface",
141 "Sreerenj Balachandran <sreerenj.balachandran@intel.com>, "
142 "George Kiagiadakis <george.kiagiadakis@collabora.com>");
144 gstelement_class->change_state =
145 GST_DEBUG_FUNCPTR (gst_wayland_sink_change_state);
146 gstelement_class->set_context =
147 GST_DEBUG_FUNCPTR (gst_wayland_sink_set_context);
149 gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_wayland_sink_get_caps);
150 gstbasesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_wayland_sink_set_caps);
151 gstbasesink_class->preroll = GST_DEBUG_FUNCPTR (gst_wayland_sink_preroll);
152 gstbasesink_class->propose_allocation =
153 GST_DEBUG_FUNCPTR (gst_wayland_sink_propose_allocation);
154 gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_wayland_sink_render);
156 g_object_class_install_property (gobject_class, PROP_DISPLAY,
157 g_param_spec_string ("display", "Wayland Display name", "Wayland "
158 "display name to connect to, if not supplied via the GstContext",
159 NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
163 gst_wayland_sink_init (GstWaylandSink * sink)
165 g_cond_init (&sink->render_cond);
169 gst_wayland_sink_get_property (GObject * object,
170 guint prop_id, GValue * value, GParamSpec * pspec)
172 GstWaylandSink *sink = GST_WAYLAND_SINK (object);
176 g_value_set_string (value, sink->display_name);
179 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
185 gst_wayland_sink_set_property (GObject * object,
186 guint prop_id, const GValue * value, GParamSpec * pspec)
188 GstWaylandSink *sink = GST_WAYLAND_SINK (object);
192 sink->display_name = g_value_dup_string (value);
195 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
201 gst_wayland_sink_finalize (GObject * object)
203 GstWaylandSink *sink = GST_WAYLAND_SINK (object);
205 GST_DEBUG_OBJECT (sink, "Finalizing the sink..");
207 if (sink->last_buffer)
208 gst_buffer_unref (sink->last_buffer);
210 /* see comment about this call in gst_wayland_sink_change_state() */
212 gst_wayland_compositor_release_all_buffers (GST_WAYLAND_BUFFER_POOL
215 g_object_unref (sink->display);
218 g_object_unref (sink->window);
220 gst_object_unref (sink->pool);
222 if (sink->display_name)
223 g_free (sink->display_name);
225 g_cond_clear (&sink->render_cond);
227 G_OBJECT_CLASS (parent_class)->finalize (object);
231 gst_wayland_sink_find_display (GstWaylandSink * sink)
235 GstContext *context = NULL;
236 GError *error = NULL;
239 if (!sink->display) {
240 /* first query upstream for the needed display handle */
241 query = gst_query_new_context (GST_WAYLAND_DISPLAY_HANDLE_CONTEXT_TYPE);
242 if (gst_pad_peer_query (GST_VIDEO_SINK_PAD (sink), query)) {
243 gst_query_parse_context (query, &context);
244 gst_wayland_sink_set_context (GST_ELEMENT (sink), context);
246 gst_query_unref (query);
248 if (G_LIKELY (!sink->display)) {
249 /* now ask the application to set the display handle */
250 msg = gst_message_new_need_context (GST_OBJECT_CAST (sink),
251 GST_WAYLAND_DISPLAY_HANDLE_CONTEXT_TYPE);
252 gst_element_post_message (GST_ELEMENT_CAST (sink), msg);
253 /* at this point we expect gst_wayland_sink_set_context
254 * to get called and fill sink->display */
256 if (!sink->display) {
257 /* if the application didn't set a display, let's create it ourselves */
258 sink->display = gst_wl_display_new (sink->display_name, &error);
260 GST_ELEMENT_WARNING (sink, RESOURCE, OPEN_READ_WRITE,
261 ("Could not initialise Wayland output"),
262 ("Failed to create GstWlDisplay: '%s'", error->message));
263 g_error_free (error);
266 /* inform the world about the new display */
268 gst_wayland_display_handle_context_new (sink->display->display);
269 msg = gst_message_new_have_context (GST_OBJECT_CAST (sink), context);
270 gst_element_post_message (GST_ELEMENT_CAST (sink), msg);
279 static GstStateChangeReturn
280 gst_wayland_sink_change_state (GstElement * element, GstStateChange transition)
282 GstWaylandSink *sink = GST_WAYLAND_SINK (element);
283 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
285 switch (transition) {
286 case GST_STATE_CHANGE_NULL_TO_READY:
287 if (!gst_wayland_sink_find_display (sink))
288 return GST_STATE_CHANGE_FAILURE;
294 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
295 if (ret == GST_STATE_CHANGE_FAILURE)
298 switch (transition) {
299 case GST_STATE_CHANGE_PAUSED_TO_READY:
300 if (sink->window && gst_wl_window_is_toplevel (sink->window)) {
301 gst_buffer_replace (&sink->last_buffer, NULL);
302 g_clear_object (&sink->window);
305 case GST_STATE_CHANGE_READY_TO_NULL:
306 /* We don't need to keep the display around, unless we are embedded
307 * in another window as a subsurface, in which case we should continue
308 * to respond to expose() and therefore both the window and the display
310 if (sink->display && !sink->window) { /* -> the window was toplevel */
311 /* Force all buffers to return to the pool, regardless of
312 * whether the compositor has released them or not. We are
313 * going to kill the display, so we need to return all buffers
314 * to be destroyed before this happens.
315 * Note that this is done here instead of the pool destructor
316 * because the buffers hold a reference to the pool. Also,
317 * the buffers can only be unref'ed from the display's event loop
318 * and the pool holds a reference to the display. If we drop
319 * our references here, when the compositor releases the buffers,
320 * they will be unref'ed from the event loop thread, which will
321 * unref the pool and therefore the display, which will try to
322 * stop the thread from within itself and cause a deadlock.
325 gst_wayland_compositor_release_all_buffers (GST_WAYLAND_BUFFER_POOL
328 g_clear_object (&sink->display);
329 g_clear_object (&sink->pool);
340 gst_wayland_sink_set_context (GstElement * element, GstContext * context)
342 GstWaylandSink *sink = GST_WAYLAND_SINK (element);
344 if (gst_context_has_context_type (context,
345 GST_WAYLAND_DISPLAY_HANDLE_CONTEXT_TYPE)) {
346 struct wl_display *display;
347 GError *error = NULL;
349 g_clear_object (&sink->display);
350 display = gst_wayland_display_handle_context_get_handle (context);
351 sink->display = gst_wl_display_new_existing (display, FALSE, &error);
354 GST_ELEMENT_WARNING (sink, RESOURCE, OPEN_READ_WRITE,
355 ("Could not set display handle"),
356 ("Failed to use the external wayland display: '%s'", error->message));
357 g_error_free (error);
361 if (GST_ELEMENT_CLASS (parent_class)->set_context)
362 GST_ELEMENT_CLASS (parent_class)->set_context (element, context);
366 gst_wayland_sink_get_caps (GstBaseSink * bsink, GstCaps * filter)
368 GstWaylandSink *sink;
371 sink = GST_WAYLAND_SINK (bsink);
373 caps = gst_pad_get_pad_template_caps (GST_VIDEO_SINK_PAD (sink));
376 GValue list = G_VALUE_INIT;
377 GValue value = G_VALUE_INIT;
380 enum wl_shm_format fmt;
382 g_value_init (&list, GST_TYPE_LIST);
383 g_value_init (&value, G_TYPE_STRING);
385 formats = sink->display->formats;
386 for (i = 0; i < formats->len; i++) {
387 fmt = g_array_index (formats, uint32_t, i);
388 g_value_set_string (&value, gst_wayland_format_to_string (fmt));
389 gst_value_list_append_value (&list, &value);
392 caps = gst_caps_make_writable (caps);
393 gst_structure_set_value (gst_caps_get_structure (caps, 0), "format", &list);
395 GST_DEBUG_OBJECT (sink, "display caps: %" GST_PTR_FORMAT, caps);
399 GstCaps *intersection;
402 gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
403 gst_caps_unref (caps);
411 gst_wayland_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
413 GstWaylandSink *sink;
414 GstBufferPool *newpool;
416 enum wl_shm_format format;
419 GstStructure *structure;
420 static GstAllocationParams params = { 0, 0, 0, 15, };
422 sink = GST_WAYLAND_SINK (bsink);
423 GST_OBJECT_LOCK (sink);
425 GST_DEBUG_OBJECT (sink, "set caps %" GST_PTR_FORMAT, caps);
427 /* extract info from caps */
428 if (!gst_video_info_from_caps (&info, caps))
431 format = gst_video_format_to_wayland_format (GST_VIDEO_INFO_FORMAT (&info));
435 /* store the video size */
436 sink->video_width = info.width;
437 sink->video_height = info.height;
439 /* verify we support the requested format */
440 formats = sink->display->formats;
441 for (i = 0; i < formats->len; i++) {
442 if (g_array_index (formats, uint32_t, i) == format)
446 if (i >= formats->len)
447 goto unsupported_format;
449 /* create a new pool for the new configuration */
450 newpool = gst_wayland_buffer_pool_new (sink->display);
454 structure = gst_buffer_pool_get_config (newpool);
455 gst_buffer_pool_config_set_params (structure, caps, info.size, 2, 0);
456 gst_buffer_pool_config_set_allocator (structure, NULL, ¶ms);
457 if (!gst_buffer_pool_set_config (newpool, structure))
460 gst_object_replace ((GstObject **) & sink->pool, (GstObject *) newpool);
461 gst_object_unref (newpool);
463 GST_OBJECT_UNLOCK (sink);
468 GST_DEBUG_OBJECT (sink,
469 "Could not locate image format from caps %" GST_PTR_FORMAT, caps);
474 GST_DEBUG_OBJECT (sink, "Format %s is not available on the display",
475 gst_wayland_format_to_string (format));
480 GST_DEBUG_OBJECT (sink, "Failed to create new pool");
485 GST_DEBUG_OBJECT (bsink, "failed setting config");
490 GST_OBJECT_UNLOCK (sink);
496 gst_wayland_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
498 GstWaylandSink *sink = GST_WAYLAND_SINK (bsink);
499 GstBufferPool *pool = NULL;
500 GstStructure *config;
505 gst_query_parse_allocation (query, &caps, &need_pool);
511 pool = gst_object_ref (sink->pool);
516 /* we had a pool, check caps */
517 config = gst_buffer_pool_get_config (pool);
518 gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
520 if (!gst_caps_is_equal (caps, pcaps)) {
521 /* different caps, we can't use this pool */
522 gst_object_unref (pool);
525 gst_structure_free (config);
528 if (pool == NULL && need_pool) {
531 if (!gst_video_info_from_caps (&info, caps))
534 GST_DEBUG_OBJECT (sink, "create new pool");
535 pool = gst_wayland_buffer_pool_new (sink->display);
537 /* the normal size of a frame */
540 config = gst_buffer_pool_get_config (pool);
541 gst_buffer_pool_config_set_params (config, caps, size, 2, 0);
542 if (!gst_buffer_pool_set_config (pool, config))
546 gst_query_add_allocation_pool (query, pool, size, 2, 0);
547 gst_object_unref (pool);
555 GST_DEBUG_OBJECT (bsink, "no caps specified");
560 GST_DEBUG_OBJECT (bsink, "invalid caps specified");
565 GST_DEBUG_OBJECT (bsink, "failed setting config");
566 gst_object_unref (pool);
572 gst_wayland_sink_preroll (GstBaseSink * bsink, GstBuffer * buffer)
574 GST_DEBUG_OBJECT (bsink, "preroll buffer %p", buffer);
575 return gst_wayland_sink_render (bsink, buffer);
579 frame_redraw_callback (void *data, struct wl_callback *callback, uint32_t time)
581 GstWaylandSink *sink = data;
583 GST_LOG ("frame_redraw_cb");
585 g_atomic_int_set (&sink->redraw_pending, FALSE);
586 wl_callback_destroy (callback);
589 static const struct wl_callback_listener frame_callback_listener = {
590 frame_redraw_callback
593 /* must be called with the object lock */
595 render_last_buffer (GstWaylandSink * sink)
598 struct wl_surface *surface;
599 struct wl_callback *callback;
600 GstVideoRectangle src, dst, res;
602 meta = gst_buffer_get_wl_meta (sink->last_buffer);
603 surface = gst_wl_window_get_wl_surface (sink->window);
605 g_atomic_int_set (&sink->redraw_pending, TRUE);
606 callback = wl_surface_frame (surface);
607 wl_callback_add_listener (callback, &frame_callback_listener, sink);
609 /* Here we essentially add a reference to the buffer. This represents
610 * the fact that the compositor is using the buffer and it should
611 * not return back to the pool and be reused until the compositor
612 * releases it. The release is handled internally in the pool */
613 gst_wayland_compositor_acquire_buffer (meta->pool, sink->last_buffer);
615 src.w = sink->video_width;
616 src.h = sink->video_height;
617 dst.w = sink->window->width;
618 dst.h = sink->window->height;
619 gst_video_sink_center_rect (src, dst, &res, TRUE);
621 if (sink->window->subsurface)
622 wl_subsurface_set_position (sink->window->subsurface,
623 sink->window->x + res.x, sink->window->y + res.y);
624 wl_viewport_set_destination (sink->window->viewport, res.w, res.h);
626 wl_surface_attach (surface, meta->wbuffer, 0, 0);
627 wl_surface_damage (surface, 0, 0, dst.w, dst.h);
629 wl_surface_commit (surface);
630 wl_display_flush (sink->display->display);
634 gst_wayland_sink_render (GstBaseSink * bsink, GstBuffer * buffer)
636 GstWaylandSink *sink = GST_WAYLAND_SINK (bsink);
637 GstBuffer *to_render;
639 GstFlowReturn ret = GST_FLOW_OK;
641 /* ask for window handle. do that before locking the sink, because
642 * set_window_handle & friends will lock it in this context */
644 gst_video_overlay_prepare_window_handle (GST_VIDEO_OVERLAY (sink));
646 GST_OBJECT_LOCK (sink);
648 GST_LOG_OBJECT (sink, "render buffer %p", buffer);
650 /* if we were not provided a window, create one ourselves */
652 sink->window = gst_wl_window_new_toplevel (sink->display, sink->video_width,
654 else if (sink->window->width == 0 || sink->window->height == 0)
657 /* surface is resizing - drop buffers until finished */
658 if (sink->drawing_frozen)
661 /* drop buffers until we get a frame callback */
662 if (g_atomic_int_get (&sink->redraw_pending) == TRUE)
665 meta = gst_buffer_get_wl_meta (buffer);
667 if (meta && meta->pool->display == sink->display) {
668 GST_LOG_OBJECT (sink, "buffer %p from our pool, writing directly", buffer);
672 GST_LOG_OBJECT (sink, "buffer %p not from our pool, copying", buffer);
677 if (!gst_buffer_pool_set_active (sink->pool, TRUE))
678 goto activate_failed;
680 ret = gst_buffer_pool_acquire_buffer (sink->pool, &to_render, NULL);
681 if (ret != GST_FLOW_OK)
684 gst_buffer_map (buffer, &src, GST_MAP_READ);
685 gst_buffer_fill (to_render, 0, src.data, src.size);
686 gst_buffer_unmap (buffer, &src);
689 gst_buffer_replace (&sink->last_buffer, to_render);
690 render_last_buffer (sink);
692 /* notify _resume_rendering() in case it's waiting */
693 sink->rendered = TRUE;
694 g_cond_broadcast (&sink->render_cond);
696 if (buffer != to_render)
697 gst_buffer_unref (to_render);
702 GST_ELEMENT_ERROR (sink, RESOURCE, WRITE,
703 ("Window has no size set"),
704 ("Make sure you set the size after calling set_window_handle"));
705 ret = GST_FLOW_ERROR;
710 GST_WARNING_OBJECT (sink, "could not create image");
715 GST_ELEMENT_ERROR (sink, RESOURCE, WRITE,
716 ("Internal error: can't allocate images"),
717 ("We don't have a bufferpool negotiated"));
718 ret = GST_FLOW_ERROR;
723 GST_ERROR_OBJECT (sink, "failed to activate bufferpool.");
724 ret = GST_FLOW_ERROR;
729 GST_OBJECT_UNLOCK (sink);
735 gst_wayland_sink_videooverlay_init (GstVideoOverlayInterface * iface)
737 iface->set_window_handle = gst_wayland_sink_set_window_handle;
738 iface->set_render_rectangle = gst_wayland_sink_set_render_rectangle;
739 iface->expose = gst_wayland_sink_expose;
743 gst_wayland_sink_set_window_handle (GstVideoOverlay * overlay, guintptr handle)
745 GstWaylandSink *sink = GST_WAYLAND_SINK (overlay);
746 struct wl_surface *surface = (struct wl_surface *) handle;
748 g_return_if_fail (sink != NULL);
750 GST_OBJECT_LOCK (sink);
752 GST_DEBUG_OBJECT (sink, "Setting window handle %" GST_PTR_FORMAT,
755 g_clear_object (&sink->window);
758 if (G_LIKELY (gst_wayland_sink_find_display (sink))) {
759 /* we cannot use our own display with an external window handle */
760 if (G_UNLIKELY (sink->display->own_display)) {
761 GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_READ_WRITE,
762 ("Application did not provide a wayland display handle"),
763 ("waylandsink cannot use an externally-supplied surface without "
764 "an externally-supplied display handle. Consider providing a "
765 "display handle from your application with GstContext"));
767 sink->window = gst_wl_window_new_in_surface (sink->display, surface);
770 GST_ERROR_OBJECT (sink, "Failed to find display handle, "
771 "ignoring window handle");
775 GST_OBJECT_UNLOCK (sink);
779 gst_wayland_sink_set_render_rectangle (GstVideoOverlay * overlay,
780 gint x, gint y, gint w, gint h)
782 GstWaylandSink *sink = GST_WAYLAND_SINK (overlay);
784 g_return_if_fail (sink != NULL);
786 GST_OBJECT_LOCK (sink);
788 GST_OBJECT_UNLOCK (sink);
789 GST_WARNING_OBJECT (sink,
790 "set_render_rectangle called without window, ignoring");
794 GST_DEBUG_OBJECT (sink, "window geometry changed to (%d, %d) %d x %d",
796 gst_wl_window_set_size (sink->window, x, y, w, h);
797 GST_OBJECT_UNLOCK (sink);
801 gst_wayland_sink_expose (GstVideoOverlay * overlay)
803 GstWaylandSink *sink = GST_WAYLAND_SINK (overlay);
805 g_return_if_fail (sink != NULL);
807 GST_DEBUG_OBJECT (sink, "expose");
809 GST_OBJECT_LOCK (sink);
810 if (sink->last_buffer && g_atomic_int_get (&sink->redraw_pending) == FALSE) {
811 GST_DEBUG_OBJECT (sink, "redrawing last buffer");
812 render_last_buffer (sink);
814 GST_OBJECT_UNLOCK (sink);
818 gst_wayland_sink_waylandvideo_init (GstWaylandVideoInterface * iface)
820 iface->pause_rendering = gst_wayland_sink_pause_rendering;
821 iface->resume_rendering = gst_wayland_sink_resume_rendering;
825 gst_wayland_sink_pause_rendering (GstWaylandVideo * video)
827 GstWaylandSink *sink = GST_WAYLAND_SINK (video);
828 g_return_if_fail (sink != NULL);
830 GST_OBJECT_LOCK (sink);
831 sink->drawing_frozen = TRUE;
832 GST_OBJECT_UNLOCK (sink);
836 gst_wayland_sink_resume_rendering (GstWaylandVideo * video)
838 GstWaylandSink *sink = GST_WAYLAND_SINK (video);
839 g_return_if_fail (sink != NULL);
841 GST_DEBUG_OBJECT (sink, "resuming rendering");
843 GST_OBJECT_LOCK (sink);
844 sink->drawing_frozen = FALSE;
846 if (GST_STATE (sink) == GST_STATE_PLAYING) {
847 sink->rendered = FALSE;
848 while (sink->rendered == FALSE)
849 g_cond_wait (&sink->render_cond, GST_OBJECT_GET_LOCK (sink));
850 GST_DEBUG_OBJECT (sink, "synchronized with render()");
851 } else if (sink->window && sink->last_buffer &&
852 g_atomic_int_get (&sink->redraw_pending) == FALSE) {
853 render_last_buffer (sink);
854 GST_DEBUG_OBJECT (sink, "last buffer redrawn");
857 GST_OBJECT_UNLOCK (sink);
861 plugin_init (GstPlugin * plugin)
863 GST_DEBUG_CATEGORY_INIT (gstwayland_debug, "waylandsink", 0,
864 " wayland video sink");
866 return gst_element_register (plugin, "waylandsink", GST_RANK_MARGINAL,
867 GST_TYPE_WAYLAND_SINK);
870 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
873 "Wayland Video Sink", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,