dlls/strmbase/dispatch.c

   1 /*
   2  * ITypeInfo cache for IDispatch
   3  *
   4  * Copyright 2019 Zebediah Figura
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "strmbase_private.h"
  22
  23 WINE_DEFAULT_DEBUG_CHANNEL(strmbase);
  24
  25 static ITypeLib *control_typelib;
  26 static ITypeInfo *control_typeinfo[last_tid];
  27
  28 static REFIID control_tid_id[] =
  29 {
  30     &IID_IBasicAudio,
  31     &IID_IBasicVideo,
  32     &IID_IMediaControl,
  33     &IID_IMediaEvent,
  34     &IID_IMediaPosition,
  35     &IID_IVideoWindow,
  36 };
  37
  38 HRESULT strmbase_get_typeinfo(enum strmbase_type_id tid, ITypeInfo **ret)
  39 {
  40     HRESULT hr;
  41
  42     if (!control_typelib)
  43     {
  44         ITypeLib *typelib;
  45
  46         hr = LoadRegTypeLib(&LIBID_QuartzTypeLib, 1, 0, LOCALE_SYSTEM_DEFAULT, &typelib);
  47         if (FAILED(hr))
  48         {
  49             ERR("Failed to load typelib, hr %#x.\n", hr);
  50             return hr;
  51         }
  52         if (InterlockedCompareExchangePointer((void **)&control_typelib, typelib, NULL))
  53             ITypeLib_Release(typelib);
  54     }
  55     if (!control_typeinfo[tid])
  56     {
  57         ITypeInfo *typeinfo;
  58
  59         hr = ITypeLib_GetTypeInfoOfGuid(control_typelib, control_tid_id[tid], &typeinfo);
  60         if (FAILED(hr))
  61         {
  62             ERR("Failed to get type info for %s, hr %#x.\n", debugstr_guid(control_tid_id[tid]), hr);
  63             return hr;
  64         }
  65         if (InterlockedCompareExchangePointer((void **)(control_typeinfo + tid), typeinfo, NULL))
  66             ITypeInfo_Release(typeinfo);
  67     }
  68     ITypeInfo_AddRef(*ret = control_typeinfo[tid]);
  69     return S_OK;
  70 }
  71
  72 void strmbase_release_typelibs(void)
  73 {
  74     unsigned int i;
  75
  76     for (i = 0; i < ARRAY_SIZE(control_typeinfo); ++i)
  77     {
  78         if (control_typeinfo[i])
  79             ITypeInfo_Release(control_typeinfo[i]);
  80     }
  81     if (control_typelib)
  82         ITypeLib_Release(control_typelib);
  83 }