com.h

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/*
 * Modified for use with MPlayer, detailed changelog at
 * http://svn.mplayerhq.hu/mplayer/trunk/
 * $Id: com.h,v 1.2 2008/03/03 08:11:38 dsqiu Exp $
 */

#ifndef AVIFILE_COM_H
#define AVIFILE_COM_H

#include "config.h"

#ifdef HAVE_STDINT_H
#include <stdint.h>
#else
#include <inttypes.h>
#endif

/**
 * Internal functions and structures for COM emulation code.
 */

#if !defined(WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)

#ifdef __cplusplus
extern "C" {
#endif

#ifndef GUID_TYPE
#define GUID_TYPE
typedef struct
{
    uint32_t f1;
    uint16_t f2;
    uint16_t f3;
    uint8_t  f4[8];
} GUID;
#endif

extern const GUID IID_IUnknown;
extern const GUID IID_IClassFactory;

typedef long (*GETCLASSOBJECT) (GUID* clsid, const GUID* iid, void** ppv);
int RegisterComClass(const GUID* clsid, GETCLASSOBJECT gcs);
int UnregisterComClass(const GUID* clsid, GETCLASSOBJECT gcs);

#ifndef STDCALL
#define STDCALL __attribute__((__stdcall__))
#endif

struct IUnknown;
struct IClassFactory;
struct IUnknown_vt
{
    long STDCALL (*QueryInterface)(struct IUnknown* _this, const GUID* iid, void** ppv);
    long STDCALL (*AddRef)(struct IUnknown* _this) ;
    long STDCALL (*Release)(struct IUnknown* _this) ;
} ;

typedef struct IUnknown
{
    struct IUnknown_vt* vt;
} IUnknown;

struct IClassFactory_vt
{
    long STDCALL (*QueryInterface)(struct IUnknown* _this, const GUID* iid, void** ppv);
    long STDCALL (*AddRef)(struct IUnknown* _this) ;
    long STDCALL (*Release)(struct IUnknown* _this) ;
    long STDCALL (*CreateInstance)(struct IClassFactory* _this, struct IUnknown* pUnkOuter, const GUID* riid, void** ppvObject);
};

struct IClassFactory
{
    struct IClassFactory_vt* vt;
};

#ifdef WIN32_LOADER 
long CoCreateInstance(GUID* rclsid, struct IUnknown* pUnkOuter,
 		      long dwClsContext, const GUID* riid, void** ppv);
void* CoTaskMemAlloc(unsigned long cb);
void CoTaskMemFree(void* cb);
#else
long STDCALL CoCreateInstance(GUID* rclsid, struct IUnknown* pUnkOuter,
		      long dwClsContext, const GUID* riid, void** ppv);
void* STDCALL  CoTaskMemAlloc(unsigned long);
void  STDCALL  CoTaskMemFree(void*);
#endif

#ifdef __cplusplus
};
#endif /* __cplusplus */

#endif /* WIN32 */

#endif /* AVIFILE_COM_H */