src/gallium/frontends/omx/vid_omx_common.c

   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
  46 static mtx_t omx_lock = _MTX_INITIALIZER_NP;
  47 static Display *omx_display = NULL;
  48 static struct vl_screen *omx_screen = NULL;
  49 static unsigned omx_usecount = 0;
  50 static const char *omx_render_node = NULL;
  51 static int drm_fd;
  52
  53 struct 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
  93 error:
  94    mtx_unlock(&omx_lock);
  95    return NULL;
  96 }
  97
  98 void 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 }