dlls/mf/mf_private.h

   1 /*
   2  * Copyright 2019 Nikolay Sivov for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "mfidl.h"
  20
  21 #include "wine/heap.h"
  22
  23 static inline BOOL mf_array_reserve(void **elements, size_t *capacity, size_t count, size_t size)
  24 {
  25     size_t new_capacity, max_capacity;
  26     void *new_elements;
  27
  28     if (count <= *capacity)
  29         return TRUE;
  30
  31     max_capacity = ~(SIZE_T)0 / size;
  32     if (count > max_capacity)
  33         return FALSE;
  34
  35     new_capacity = max(4, *capacity);
  36     while (new_capacity < count && new_capacity <= max_capacity / 2)
  37         new_capacity *= 2;
  38     if (new_capacity < count)
  39         new_capacity = max_capacity;
  40
  41     if (!(new_elements = heap_realloc(*elements, new_capacity * size)))
  42         return FALSE;
  43
  44     *elements = new_elements;
  45     *capacity = new_capacity;
  46
  47     return TRUE;
  48 }
  49
  50 struct activate_funcs
  51 {
  52     HRESULT (*create_object)(IMFAttributes *attributes, void *context, IUnknown **object);
  53     void (*free_private)(void *context);
  54 };
  55
  56 HRESULT create_activation_object(void *context, const struct activate_funcs *funcs, IMFActivate **ret) DECLSPEC_HIDDEN;