dlls/mfreadwrite/mf_private.h

   1 /*
   2  * Copyright 2020 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 "mferror.h"
  20
  21 extern HRESULT create_sink_writer_from_url(const WCHAR *url, IMFByteStream *stream,
  22         IMFAttributes *attributes, REFIID riid, void **out);
  23 extern HRESULT create_sink_writer_from_sink(IMFMediaSink *sink, IMFAttributes *attributes,
  24         REFIID riid, void **out);
  25
  26 static inline BOOL mf_array_reserve(void **elements, size_t *capacity, size_t count, size_t size)
  27 {
  28     size_t new_capacity, max_capacity;
  29     void *new_elements;
  30
  31     if (count <= *capacity)
  32         return TRUE;
  33
  34     max_capacity = ~(SIZE_T)0 / size;
  35     if (count > max_capacity)
  36         return FALSE;
  37
  38     new_capacity = max(4, *capacity);
  39     while (new_capacity < count && new_capacity <= max_capacity / 2)
  40         new_capacity *= 2;
  41     if (new_capacity < count)
  42         new_capacity = max_capacity;
  43
  44     if (!(new_elements = realloc(*elements, new_capacity * size)))
  45         return FALSE;
  46
  47     *elements = new_elements;
  48     *capacity = new_capacity;
  49
  50     return TRUE;
  51 }