static void
gst_wayland_sink_set_window_handle (GstVideoOverlay * overlay, guintptr handle)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (overlay);
struct wl_surface *surface = (struct wl_surface *) handle;
g_return_if_fail (sink != NULL);
g_mutex_lock (&sink->render_lock);
GST_DEBUG_OBJECT (sink, "Setting window handle %" GST_PTR_FORMAT,
(void *) handle);
g_clear_object (&sink->window);
if (handle) {
if (G_LIKELY (gst_wayland_sink_find_display (sink))) {
/* we cannot use our own display with an external window handle */
if (G_UNLIKELY (sink->display->own_display)) {
GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_READ_WRITE,
("Application did not provide a wayland display handle"),
("waylandsink cannot use an externally-supplied surface without "
"an externally-supplied display handle. Consider providing a "
"display handle from your application with GstContext"));
} else {
sink->window = gst_wl_window_new_in_surface (sink->display, surface);
}
} else {
GST_ERROR_OBJECT (sink, "Failed to find display handle, "
"ignoring window handle");
}
}
g_mutex_unlock (&sink->render_lock);
}
static GstStateChangeReturn
gst_wayland_sink_change_state (GstElement * element, GstStateChange transition)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_wayland_sink_find_display (sink))
return GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_buffer_replace (&sink->last_buffer, NULL);
if (sink->window) {
if (gst_wl_window_is_toplevel (sink->window)) {
g_clear_object (&sink->window);
} else {
/* remove buffer from surface, show nothing */
gst_wl_window_render (sink->window, NULL, NULL);
}
}
break;
case GST_STATE_CHANGE_READY_TO_NULL:
g_mutex_lock (&sink->display_lock);
/* If we had a toplevel window, we most likely have our own connection
* to the display too, and it is a good idea to disconnect and allow
* potentially the application to embed us with GstVideoOverlay
* (which requires to re-use the same display connection as the parent
* surface). If we didn't have a toplevel window, then the display
* connection that we have is definitely shared with the application
* and it's better to keep it around (together with the window handle)
* to avoid requesting them again from the application if/when we are
* restarted (GstVideoOverlay behaves like that in other sinks)
*/
if (sink->display && !sink->window) { /* -> the window was toplevel */
g_clear_object (&sink->display);
}
g_mutex_unlock (&sink->display_lock);
g_clear_object (&sink->pool);
break;
default:
break;
}
return ret;
}
static GstStateChangeReturn
gst_wayland_sink_change_state (GstElement * element, GstStateChange transition)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_wayland_sink_find_display (sink))
return GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_buffer_replace (&sink->last_buffer, NULL);
if (sink->window) {
if (gst_wl_window_is_toplevel (sink->window)) {
g_clear_object (&sink->window);
} else {
/* remove buffer from surface, show nothing */
wl_surface_attach (sink->window->surface, NULL, 0, 0);
wl_surface_damage (sink->window->surface, 0, 0,
sink->window->surface_width, sink->window->surface_height);
wl_surface_commit (sink->window->surface);
wl_display_flush (sink->display->display);
}
}
break;
case GST_STATE_CHANGE_READY_TO_NULL:
g_mutex_lock (&sink->display_lock);
/* If we had a toplevel window, we most likely have our own connection
* to the display too, and it is a good idea to disconnect and allow
* potentially the application to embed us with GstVideoOverlay
* (which requires to re-use the same display connection as the parent
* surface). If we didn't have a toplevel window, then the display
* connection that we have is definitely shared with the application
* and it's better to keep it around (together with the window handle)
* to avoid requesting them again from the application if/when we are
* restarted (GstVideoOverlay behaves like that in other sinks)
*/
if (sink->display && !sink->window) { /* -> the window was toplevel */
/* Force all buffers to return to the pool, regardless of
* whether the compositor has released them or not. We are
* going to kill the display, so we need to return all buffers
* to be destroyed before this happens.
* Note that this is done here instead of the pool destructor
* because the buffers hold a reference to the pool. Also,
* the buffers can only be unref'ed from the display's event loop
* and the pool holds a reference to the display. If we drop
* our references here, when the compositor releases the buffers,
* they will be unref'ed from the event loop thread, which will
* unref the pool and therefore the display, which will try to
* stop the thread from within itself and cause a deadlock.
*/
if (sink->pool) {
gst_wayland_compositor_release_all_buffers (GST_WAYLAND_BUFFER_POOL
(sink->pool));
}
g_clear_object (&sink->display);
g_clear_object (&sink->pool);
}
g_mutex_unlock (&sink->display_lock);
break;
default:
break;
}
return ret;
}