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;
}
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;
}