C++ (Cpp) gst_context_set_vulkan_instance Exemples

Exemple #1

Fichier : vkinstance.c Projet : GrokImageCompression/gst-plugins-bad

gboolean
gst_vulkan_instance_handle_context_query (GstElement * element,
    GstQuery * query, GstVulkanInstance ** instance)
{
  gboolean res = FALSE;
  const gchar *context_type;
  GstContext *context, *old_context;

  g_return_val_if_fail (element != NULL, FALSE);
  g_return_val_if_fail (query != NULL, FALSE);
  g_return_val_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_CONTEXT, FALSE);
  g_return_val_if_fail (instance != NULL, FALSE);

  gst_query_parse_context_type (query, &context_type);

  if (g_strcmp0 (context_type, GST_VULKAN_INSTANCE_CONTEXT_TYPE_STR) == 0) {
    gst_query_parse_context (query, &old_context);

    if (old_context)
      context = gst_context_copy (old_context);
    else
      context = gst_context_new (GST_VULKAN_INSTANCE_CONTEXT_TYPE_STR, TRUE);

    gst_context_set_vulkan_instance (context, *instance);
    gst_query_set_context (query, context);
    gst_context_unref (context);

    res = *instance != NULL;
  }

  return res;
}

Exemple #2

Fichier : vkutils.c Projet : mintert/gst-plugins-bad

gboolean
gst_vulkan_ensure_element_data (gpointer element,
    GstVulkanDisplay ** display_ptr, GstVulkanInstance ** instance_ptr)
{
  g_return_val_if_fail (element != NULL, FALSE);
  g_return_val_if_fail (display_ptr != NULL, FALSE);
  g_return_val_if_fail (instance_ptr != NULL, FALSE);

  /*  1) Check if the element already has a context of the specific
   *     type.
   */
  if (!*instance_ptr) {
    GError *error = NULL;

    gst_vulkan_global_context_query (element,
        GST_VULKAN_INSTANCE_CONTEXT_TYPE_STR);

    /* Neighbour found and it updated the display */
    if (!*instance_ptr) {
      GstContext *context;

      /* If no neighboor, or application not interested, use system default */
      *instance_ptr = gst_vulkan_instance_new ();

      context = gst_context_new (GST_VULKAN_INSTANCE_CONTEXT_TYPE_STR, TRUE);
      gst_context_set_vulkan_instance (context, *instance_ptr);

      _vk_context_propagate (element, context);
    }

    if (!gst_vulkan_instance_open (*instance_ptr, &error)) {
      GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
          ("Failed to create vulkan instance"), ("%s", error->message));
      g_clear_error (&error);
      return FALSE;
    }
  }

  if (!*display_ptr) {
    _vk_display_context_query (element, display_ptr);

    /* Neighbour found and it updated the display */
    if (!*display_ptr) {
      GstContext *context;

      /* instance is required before the display */
      g_return_val_if_fail (*instance_ptr != NULL, FALSE);

      /* If no neighboor, or application not interested, use system default */
      *display_ptr = gst_vulkan_display_new (*instance_ptr);

      context = gst_context_new (GST_VULKAN_DISPLAY_CONTEXT_TYPE_STR, TRUE);
      gst_context_set_vulkan_display (context, *display_ptr);

      _vk_context_propagate (element, context);
    }
  }

  return *display_ptr != NULL && *instance_ptr != NULL;
}