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  1. /*
  2.  * va_wayland_emgd.c - Wayland/EMGD helpers
  3.  *
  4.  * Copyright (c) 2012 Intel Corporation. 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 INTEL AND/OR ITS SUPPLIERS 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. #include "sysdeps.h"
  28. #include <unistd.h>
  29. #include <dlfcn.h>
  30. #include "va_drmcommon.h"
  31. #include "va_wayland_emgd.h"
  32. #include "va_wayland_private.h"
  33.  
  34. /* XXX: Wayland/EMGD support currently lives in libwayland-emgd.so.* library */
  35. #define LIBWAYLAND_EMGD_NAME "libwayland-emgd.so.1"
  36.  
  37. typedef struct va_wayland_emgd_context {
  38.     struct va_wayland_context   base;
  39.     void                       *handle;
  40.     struct wl_emgd             *emgd;
  41.     void                       *emgd_interface;
  42.     unsigned int                is_created      : 1;
  43.     struct wl_registry         *registry;
  44. } VADisplayContextWaylandEMGD;
  45.  
  46. static inline void
  47. wl_emgd_destroy(struct wl_emgd *emgd)
  48. {
  49.     wl_proxy_destroy((struct wl_proxy *)emgd);
  50. }
  51.  
  52. static VAStatus
  53. va_DisplayContextGetDriverName(
  54.     VADisplayContextP pDisplayContext,
  55.     char            **driver_name_ptr
  56. )
  57. {
  58.     *driver_name_ptr = strdup("emgd");
  59.     return VA_STATUS_SUCCESS;
  60. }
  61.  
  62. void
  63. va_wayland_emgd_destroy(VADisplayContextP pDisplayContext)
  64. {
  65.     VADriverContextP const ctx = pDisplayContext->pDriverContext;
  66.     VADisplayContextWaylandEMGD * const wl_emgd_ctx = pDisplayContext->opaque;
  67.     struct drm_state * const drm_state = ctx->drm_state;
  68.  
  69.     if (wl_emgd_ctx->emgd) {
  70.         wl_emgd_destroy(wl_emgd_ctx->emgd);
  71.         wl_emgd_ctx->emgd = NULL;
  72.     }
  73.     wl_emgd_ctx->is_created = 0;
  74.  
  75.     if (wl_emgd_ctx->handle) {
  76.         dlclose(wl_emgd_ctx->handle);
  77.         wl_emgd_ctx->handle = NULL;
  78.     }
  79.  
  80.     if (drm_state) {
  81.         if (drm_state->fd >= 0) {
  82.             close(drm_state->fd);
  83.             drm_state->fd = -1;
  84.         }
  85.         free(ctx->drm_state);
  86.         ctx->drm_state = NULL;
  87.     }
  88. }
  89.  
  90. static void
  91. registry_handle_global(
  92.     void               *data,
  93.     struct wl_registry *registry,
  94.     uint32_t            id,
  95.     const char         *interface,
  96.     uint32_t            version
  97. )
  98. {
  99.     VADisplayContextWaylandEMGD *wl_emgd_ctx = data;
  100.  
  101.     if (strcmp(interface, "wl_emgd") == 0) {
  102.         wl_emgd_ctx->emgd =
  103.             wl_registry_bind(registry, id, wl_emgd_ctx->emgd_interface, 1);
  104.     }
  105. }
  106.  
  107. static const struct wl_registry_listener registry_listener = {
  108.     registry_handle_global,
  109.     NULL,
  110. };
  111.  
  112. bool
  113. va_wayland_emgd_create(VADisplayContextP pDisplayContext)
  114. {
  115.     VADriverContextP const ctx = pDisplayContext->pDriverContext;
  116.     VADisplayContextWaylandEMGD *wl_emgd_ctx;
  117.     struct drm_state *drm_state;
  118.     uint32_t id;
  119.  
  120.     wl_emgd_ctx = malloc(sizeof(*wl_emgd_ctx));
  121.     if (!wl_emgd_ctx)
  122.         return false;
  123.     wl_emgd_ctx->base.destroy           = va_wayland_emgd_destroy;
  124.     wl_emgd_ctx->handle                 = NULL;
  125.     wl_emgd_ctx->emgd                   = NULL;
  126.     wl_emgd_ctx->emgd_interface         = NULL;
  127.     wl_emgd_ctx->is_created             = 0;
  128.     pDisplayContext->opaque             = wl_emgd_ctx;
  129.     pDisplayContext->vaGetDriverName    = va_DisplayContextGetDriverName;
  130.  
  131.     drm_state = calloc(1, sizeof(struct drm_state));
  132.     if (!drm_state)
  133.         return false;
  134.     drm_state->fd        = -1;
  135.     drm_state->auth_type = 0;
  136.     ctx->drm_state       = drm_state;
  137.  
  138.     wl_emgd_ctx->handle = dlopen(LIBWAYLAND_EMGD_NAME, RTLD_LAZY|RTLD_LOCAL);
  139.     if (!wl_emgd_ctx->handle)
  140.         return false;
  141.  
  142.     wl_emgd_ctx->emgd_interface =
  143.         dlsym(wl_emgd_ctx->handle, "wl_emgd_interface");
  144.     if (!wl_emgd_ctx->emgd_interface)
  145.         return false;
  146.  
  147.     wl_emgd_ctx->registry = wl_display_get_registry(ctx->native_dpy);
  148.     wl_registry_add_listener(wl_emgd_ctx->registry, &registry_listener, wl_emgd_ctx);
  149.     wl_display_roundtrip(ctx->native_dpy);
  150.  
  151.     /* registry_handle_global should have been called by the
  152.      * wl_display_roundtrip above
  153.      */
  154.     if (!wl_emgd_ctx->emgd)
  155.         return false;
  156.     return true;
  157. }
  158.