loader/dshow/iunk.h

   1 /*
   2  * Modified for use with MPlayer, detailed changelog at
   3  * http://svn.mplayerhq.hu/mplayer/trunk/
   4  */
   5
   6 #ifndef MPLAYER_IUNK_H
   7 #define MPLAYER_IUNK_H
   8
   9 #include "guids.h"
  10
  11 #define INHERIT_IUNKNOWN() \
  12     long STDCALL ( *QueryInterface )(IUnknown * This, const GUID* riid, void **ppvObject); \
  13     long STDCALL ( *AddRef )(IUnknown * This); \
  14     long STDCALL ( *Release )(IUnknown * This);
  15
  16 #define DECLARE_IUNKNOWN() \
  17     int refcount;
  18
  19 #define IMPLEMENT_IUNKNOWN(CLASSNAME)           \
  20 static long STDCALL CLASSNAME ## _QueryInterface(IUnknown * This, \
  21                                           const GUID* riid, void **ppvObject) \
  22 { \
  23     CLASSNAME * me = (CLASSNAME *)This;         \
  24     GUID* r; unsigned int i = 0;                \
  25     Debug printf(#CLASSNAME "_QueryInterface(%p) called\n", This);\
  26     if (!ppvObject) return E_POINTER;           \
  27     for(r=me->interfaces; i<sizeof(me->interfaces)/sizeof(me->interfaces[0]); r++, i++) \
  28         if(!memcmp(r, riid, sizeof(*r)))        \
  29         {                                       \
  30             me->vt->AddRef((IUnknown*)This);    \
  31             *ppvObject=This;                    \
  32             return 0;                           \
  33         }                                       \
  34     Debug printf("Query failed! (GUID: 0x%x)\n", *(unsigned int*)riid); \
  35     return E_NOINTERFACE;                       \
  36 }                                               \
  37                                                 \
  38 static long STDCALL CLASSNAME ## _AddRef(IUnknown * This) \
  39 {                                               \
  40     CLASSNAME * me=( CLASSNAME *)This;          \
  41     Debug printf(#CLASSNAME "_AddRef(%p) called (ref:%d)\n", This, me->refcount); \
  42     return ++(me->refcount);                    \
  43 }                                               \
  44                                                 \
  45 static long STDCALL CLASSNAME ## _Release(IUnknown * This) \
  46 {                                               \
  47     CLASSNAME* me=( CLASSNAME *)This;           \
  48     Debug printf(#CLASSNAME "_Release(%p) called (new ref:%d)\n", This, me->refcount - 1); \
  49     if(--(me->refcount) == 0)                   \
  50                 CLASSNAME ## _Destroy(me);      \
  51     return 0;                                   \
  52 }
  53
  54 #endif /* MPLAYER_IUNK_H */