1 /*
2 * GStreamer
3 * Copyright (C) 2016 Matthew Waters <matthew@centricular.com>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21 #ifdef HAVE_CONFIG_H
22 #include "config.h"
23 #endif
24
25 #include "wayland/vkdisplay_wayland.h"
26 #include "wayland_event_source.h"
27
28 GST_DEBUG_CATEGORY_STATIC (gst_vulkan_display_wayland_debug);
29 #define GST_CAT_DEFAULT gst_vulkan_display_wayland_debug
30
31 G_DEFINE_TYPE_WITH_CODE (GstVulkanDisplayWayland, gst_vulkan_display_wayland,
32 GST_TYPE_VULKAN_DISPLAY, GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT,
33 "vulkandisplaywayland", 0, "Vulkan Wayland Display");
34 );
35
36 static void gst_vulkan_display_wayland_finalize (GObject * object);
37 static gpointer gst_vulkan_display_wayland_get_handle (GstVulkanDisplay *
38 display);
39
40 static void
registry_handle_global(void * data,struct wl_registry * registry,uint32_t name,const char * interface,uint32_t version)41 registry_handle_global (void *data, struct wl_registry *registry,
42 uint32_t name, const char *interface, uint32_t version)
43 {
44 GstVulkanDisplayWayland *display = data;
45
46 GST_TRACE_OBJECT (display, "registry_handle_global with registry %p, "
47 "interface %s, version %u", registry, interface, version);
48
49 if (g_strcmp0 (interface, "wl_compositor") == 0) {
50 display->compositor =
51 wl_registry_bind (registry, name, &wl_compositor_interface, 1);
52 } else if (g_strcmp0 (interface, "wl_subcompositor") == 0) {
53 display->subcompositor =
54 wl_registry_bind (registry, name, &wl_subcompositor_interface, 1);
55 } else if (g_strcmp0 (interface, "wl_shell") == 0) {
56 display->shell = wl_registry_bind (registry, name, &wl_shell_interface, 1);
57 }
58 }
59
60 static const struct wl_registry_listener registry_listener = {
61 registry_handle_global
62 };
63
64 static void
_connect_listeners(GstVulkanDisplayWayland * display)65 _connect_listeners (GstVulkanDisplayWayland * display)
66 {
67 display->registry = wl_display_get_registry (display->display);
68 wl_registry_add_listener (display->registry, ®istry_listener, display);
69
70 wl_display_roundtrip (display->display);
71 }
72
73 static void
gst_vulkan_display_wayland_class_init(GstVulkanDisplayWaylandClass * klass)74 gst_vulkan_display_wayland_class_init (GstVulkanDisplayWaylandClass * klass)
75 {
76 GST_VULKAN_DISPLAY_CLASS (klass)->get_handle =
77 GST_DEBUG_FUNCPTR (gst_vulkan_display_wayland_get_handle);
78
79 G_OBJECT_CLASS (klass)->finalize = gst_vulkan_display_wayland_finalize;
80 }
81
82 static void
gst_vulkan_display_wayland_init(GstVulkanDisplayWayland * display_wayland)83 gst_vulkan_display_wayland_init (GstVulkanDisplayWayland * display_wayland)
84 {
85 GstVulkanDisplay *display = (GstVulkanDisplay *) display_wayland;
86
87 display->type = GST_VULKAN_DISPLAY_TYPE_WAYLAND;
88 display_wayland->foreign_display = FALSE;
89 }
90
91 static void
gst_vulkan_display_wayland_finalize(GObject * object)92 gst_vulkan_display_wayland_finalize (GObject * object)
93 {
94 GstVulkanDisplayWayland *display_wayland =
95 GST_VULKAN_DISPLAY_WAYLAND (object);
96
97 if (!display_wayland->foreign_display && display_wayland->display) {
98 wl_display_flush (display_wayland->display);
99 wl_display_disconnect (display_wayland->display);
100 }
101
102 G_OBJECT_CLASS (gst_vulkan_display_wayland_parent_class)->finalize (object);
103 }
104
105 /**
106 * gst_vulkan_display_wayland_new:
107 * @name: (allow-none): a display name
108 *
109 * Create a new #GstVulkanDisplayWayland from the wayland display name. See wl_display_connect()
110 * for details on what is a valid name.
111 *
112 * Returns: (transfer full): a new #GstVulkanDisplayWayland or %NULL
113 */
114 GstVulkanDisplayWayland *
gst_vulkan_display_wayland_new(const gchar * name)115 gst_vulkan_display_wayland_new (const gchar * name)
116 {
117 GstVulkanDisplayWayland *ret;
118
119 ret = g_object_new (GST_TYPE_VULKAN_DISPLAY_WAYLAND, NULL);
120 gst_object_ref_sink (ret);
121 ret->display = wl_display_connect (name);
122
123 if (!ret->display) {
124 GST_ERROR ("Failed to open Wayland display connection with name, \'%s\'",
125 name);
126 return NULL;
127 }
128
129 /* connecting the listeners after attaching the event source will race with
130 * the source and the source may eat an event that we're waiting for and
131 * deadlock */
132 _connect_listeners (ret);
133
134 GST_VULKAN_DISPLAY (ret)->event_source =
135 wayland_event_source_new (ret->display, NULL);
136 g_source_attach (GST_VULKAN_DISPLAY (ret)->event_source,
137 GST_VULKAN_DISPLAY (ret)->main_context);
138
139 return ret;
140 }
141
142 /**
143 * gst_vulkan_display_wayland_new_with_display:
144 * @display: an existing, wayland display
145 *
146 * Creates a new display connection from a wl_display Display.
147 *
148 * Returns: (transfer full): a new #GstVulkanDisplayWayland
149 */
150 GstVulkanDisplayWayland *
gst_vulkan_display_wayland_new_with_display(struct wl_display * display)151 gst_vulkan_display_wayland_new_with_display (struct wl_display * display)
152 {
153 GstVulkanDisplayWayland *ret;
154
155 g_return_val_if_fail (display != NULL, NULL);
156
157 ret = g_object_new (GST_TYPE_VULKAN_DISPLAY_WAYLAND, NULL);
158 gst_object_ref_sink (ret);
159
160 ret->display = display;
161 ret->foreign_display = TRUE;
162
163 _connect_listeners (ret);
164
165 return ret;
166 }
167
168 static gpointer
gst_vulkan_display_wayland_get_handle(GstVulkanDisplay * display)169 gst_vulkan_display_wayland_get_handle (GstVulkanDisplay * display)
170 {
171 return GST_VULKAN_DISPLAY_WAYLAND (display)->display;
172 }
173
174 static gboolean
_roundtrip_async(gpointer data)175 _roundtrip_async (gpointer data)
176 {
177 GstVulkanDisplayWayland *display = data;
178
179 wl_display_roundtrip (display->display);
180
181 return G_SOURCE_REMOVE;
182 }
183
184 void
gst_vulkan_display_wayland_roundtrip_async(GstVulkanDisplayWayland * display)185 gst_vulkan_display_wayland_roundtrip_async (GstVulkanDisplayWayland * display)
186 {
187 g_return_if_fail (GST_IS_VULKAN_DISPLAY_WAYLAND (display));
188
189 g_main_context_invoke (GST_VULKAN_DISPLAY (display)->main_context,
190 (GSourceFunc) _roundtrip_async, display);
191 }
192