1 /*
2 * GStreamer
3 * Copyright (C) 2014 Matthew Waters <ystreet00@gmail.com>
4 * Copyright (C) 2019 Seungha Yang <seungha.yang@navercorp.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22 /**
23 * SECTION:gstgldisplay_egl_device
24 * @short_description: EGL EGLDeviceEXT object
25 * @title: GstGLDisplayEGLDevice
26 * @see_also: #GstGLDisplay, #GstGLDisplayEGL
27 *
28 * #GstGLDisplayEGLDevice represents a `EGLDeviceEXT` handle created internally
29 * (gst_gl_display_egl_device_new()) or wrapped by the application
30 * (gst_gl_display_egl_device_new_with_egl_device())
31 */
32
33 #ifdef HAVE_CONFIG_H
34 #include "config.h"
35 #endif
36
37 #include "gstgldisplay_egl.h"
38 #include "gstgldisplay_egl_device.h"
39
40 #include <gst/gl/gstglfeature.h>
41
42 #include "gstegl.h"
43 #include "gstglmemoryegl.h"
44
45 #ifndef EGL_DEVICE_EXT
46 typedef void *EGLDeviceEXT;
47 #endif
48
49 GST_DEBUG_CATEGORY_STATIC (gst_gl_display_debug);
50 #define GST_CAT_DEFAULT gst_gl_display_debug
51
52 typedef EGLBoolean (*eglQueryDevicesEXT_type) (EGLint max_devices,
53 EGLDeviceEXT * devices, EGLint * num_devices);
54
55 G_DEFINE_TYPE (GstGLDisplayEGLDevice, gst_gl_display_egl_device,
56 GST_TYPE_GL_DISPLAY);
57
58 static guintptr gst_gl_display_egl_device_get_handle (GstGLDisplay * display);
59
60 static void
gst_gl_display_egl_device_class_init(GstGLDisplayEGLDeviceClass * klass)61 gst_gl_display_egl_device_class_init (GstGLDisplayEGLDeviceClass * klass)
62 {
63 GstGLDisplayClass *display_class = GST_GL_DISPLAY_CLASS (klass);
64
65 display_class->get_handle =
66 GST_DEBUG_FUNCPTR (gst_gl_display_egl_device_get_handle);
67 }
68
69 static void
gst_gl_display_egl_device_init(GstGLDisplayEGLDevice * self)70 gst_gl_display_egl_device_init (GstGLDisplayEGLDevice * self)
71 {
72 GstGLDisplay *display = GST_GL_DISPLAY (self);
73
74 display->type = GST_GL_DISPLAY_TYPE_EGL_DEVICE;
75
76 gst_gl_memory_egl_init_once ();
77 }
78
79 static guintptr
gst_gl_display_egl_device_get_handle(GstGLDisplay * display)80 gst_gl_display_egl_device_get_handle (GstGLDisplay * display)
81 {
82 GstGLDisplayEGLDevice *self = GST_GL_DISPLAY_EGL_DEVICE (display);
83
84 return (guintptr) self->device;
85 }
86
87 /**
88 * gst_gl_display_egl_device_new:
89 * @device_index: the index of device to use
90 *
91 * Create a new #GstGLDisplayEGLDevice with an EGLDevice supported device
92 *
93 * Returns: (transfer full): a new #GstGLDisplayEGLDevice or %NULL
94 *
95 * Since: 1.18
96 */
97 GstGLDisplayEGLDevice *
gst_gl_display_egl_device_new(guint device_index)98 gst_gl_display_egl_device_new (guint device_index)
99 {
100 GstGLDisplayEGLDevice *ret;
101 eglQueryDevicesEXT_type query_device_func;
102 EGLint num_devices = 0;
103 EGLDeviceEXT *device_list;
104
105 GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
106
107 query_device_func =
108 (eglQueryDevicesEXT_type) eglGetProcAddress ("eglQueryDevicesEXT");
109
110 if (!query_device_func) {
111 GST_ERROR ("eglQueryDevicesEXT is unavailable");
112 return NULL;
113 }
114
115 if (query_device_func (0, NULL, &num_devices) == EGL_FALSE) {
116 GST_ERROR ("eglQueryDevicesEXT fail");
117 return NULL;
118 } else if (num_devices < 1) {
119 GST_ERROR ("no EGLDevice supported device");
120 return NULL;
121 }
122
123 if (num_devices <= device_index) {
124 GST_ERROR ("requested index %d exceeds the number of devices %d",
125 device_index, num_devices);
126 return NULL;
127 }
128
129 device_list = g_alloca (sizeof (EGLDeviceEXT) * num_devices);
130 query_device_func (num_devices, device_list, &num_devices);
131
132 ret = g_object_new (GST_TYPE_GL_DISPLAY_EGL_DEVICE, NULL);
133 gst_object_ref_sink (ret);
134
135 ret->device = device_list[device_index];
136
137 return ret;
138 }
139
140 /**
141 * gst_gl_display_egl_device_new_with_egl_device:
142 * @device: an existing EGLDeviceEXT
143 *
144 * Creates a new #GstGLDisplayEGLDevice with EGLDeviceEXT .
145 * The @device must be created using EGLDevice enumeration.
146 *
147 * Returns: (transfer full): a new #GstGLDisplayEGLDevice
148 *
149 * Since: 1.18
150 */
151 GstGLDisplayEGLDevice *
gst_gl_display_egl_device_new_with_egl_device(gpointer device)152 gst_gl_display_egl_device_new_with_egl_device (gpointer device)
153 {
154 GstGLDisplayEGLDevice *ret;
155
156 g_return_val_if_fail (device != NULL, NULL);
157
158 GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
159
160 ret = g_object_new (GST_TYPE_GL_DISPLAY_EGL_DEVICE, NULL);
161 gst_object_ref_sink (ret);
162
163 ret->device = device;
164
165 return ret;
166 }
167