1/**************************************************************************
2 *
3 * Copyright 2013 Advanced Micro Devices, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#include <assert.h>
29#include <string.h>
30#include <stdbool.h>
31
32#if defined(HAVE_X11_PLATFORM)
33#include <X11/Xlib.h>
34#else
35#define XOpenDisplay(x) NULL
36#define XCloseDisplay(x)
37#define Display void
38#endif
39
40#include "os/os_thread.h"
41#include "util/u_memory.h"
42#include "loader/loader.h"
43
44#include "vid_omx_common.h"
45
46static mtx_t omx_lock = _MTX_INITIALIZER_NP;
47static Display *omx_display = NULL;
48static struct vl_screen *omx_screen = NULL;
49static unsigned omx_usecount = 0;
50static const char *omx_render_node = NULL;
51static int drm_fd;
52
53struct vl_screen *omx_get_screen(void)
54{
55   static bool first_time = true;
56   mtx_lock(&omx_lock);
57
58   if (!omx_screen) {
59      if (first_time) {
60         omx_render_node = debug_get_option("OMX_RENDER_NODE", NULL);
61         first_time = false;
62      }
63      if (omx_render_node) {
64         drm_fd = loader_open_device(omx_render_node);
65         if (drm_fd < 0)
66            goto error;
67
68         omx_screen = vl_drm_screen_create(drm_fd);
69         if (!omx_screen) {
70            close(drm_fd);
71            goto error;
72         }
73      } else {
74         omx_display = XOpenDisplay(NULL);
75         if (!omx_display)
76            goto error;
77
78         omx_screen = vl_dri3_screen_create(omx_display, 0);
79         if (!omx_screen)
80            omx_screen = vl_dri2_screen_create(omx_display, 0);
81         if (!omx_screen) {
82            XCloseDisplay(omx_display);
83            goto error;
84         }
85      }
86   }
87
88   ++omx_usecount;
89
90   mtx_unlock(&omx_lock);
91   return omx_screen;
92
93error:
94   mtx_unlock(&omx_lock);
95   return NULL;
96}
97
98void omx_put_screen(void)
99{
100   mtx_lock(&omx_lock);
101   if ((--omx_usecount) == 0) {
102      omx_screen->destroy(omx_screen);
103      omx_screen = NULL;
104
105      if (omx_render_node)
106         close(drm_fd);
107      else
108         XCloseDisplay(omx_display);
109   }
110   mtx_unlock(&omx_lock);
111}
112