dlls/amstream/main.c

   1 /*
   2  *     MultiMedia Streams Base Functions (AMSTREAM.DLL)
   3  *
   4  * Copyright 2004 Christian Costa
   5  *
   6  * This file contains the (internal) driver registration functions,
   7  * driver enumeration APIs and DirectDraw creation functions.
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #include <stdarg.h>
  25 #include <string.h>
  26
  27 #define COBJMACROS
  28
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "winuser.h"
  32 #include "winerror.h"
  33
  34 #include "ole2.h"
  35
  36 #include "amstream_private.h"
  37 #include "amstream.h"
  38
  39 #include "wine/debug.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(amstream);
  42
  43 static DWORD dll_ref = 0;
  44
  45 /* For the moment, do nothing here. */
  46 BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpv)
  47 {
  48     switch(fdwReason) {
  49         case DLL_PROCESS_ATTACH:
  50             DisableThreadLibraryCalls(hInstDLL);
  51             break;
  52         case DLL_PROCESS_DETACH:
  53             break;
  54     }
  55     return TRUE;
  56 }
  57
  58 /******************************************************************************
  59  * Multimedia Streams ClassFactory
  60  */
  61 typedef struct {
  62     IClassFactory ITF_IClassFactory;
  63
  64     LONG ref;
  65     HRESULT (*pfnCreateInstance)(IUnknown *pUnkOuter, LPVOID *ppObj);
  66 } IClassFactoryImpl;
  67
  68 struct object_creation_info
  69 {
  70     const CLSID *clsid;
  71     HRESULT (*pfnCreateInstance)(IUnknown *pUnkOuter, LPVOID *ppObj);
  72 };
  73
  74 static const struct object_creation_info object_creation[] =
  75 {
  76     { &CLSID_AMMultiMediaStream, AM_create },
  77 };
  78
  79 static HRESULT WINAPI
  80 AMCF_QueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj)
  81 {
  82     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
  83
  84     if (IsEqualGUID(riid, &IID_IUnknown)
  85         || IsEqualGUID(riid, &IID_IClassFactory))
  86     {
  87         IClassFactory_AddRef(iface);
  88         *ppobj = This;
  89         return S_OK;
  90     }
  91
  92     WARN("(%p)->(%s,%p),not found\n",This,debugstr_guid(riid),ppobj);
  93     return E_NOINTERFACE;
  94 }
  95
  96 static ULONG WINAPI AMCF_AddRef(LPCLASSFACTORY iface)
  97 {
  98     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
  99     return InterlockedIncrement(&This->ref);
 100 }
 101
 102 static ULONG WINAPI AMCF_Release(LPCLASSFACTORY iface)
 103 {
 104     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 105
 106     ULONG ref = InterlockedDecrement(&This->ref);
 107
 108     if (ref == 0)
 109         HeapFree(GetProcessHeap(), 0, This);
 110
 111     return ref;
 112 }
 113
 114
 115 static HRESULT WINAPI AMCF_CreateInstance(LPCLASSFACTORY iface, LPUNKNOWN pOuter,
 116                                           REFIID riid, LPVOID *ppobj)
 117 {
 118     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 119     HRESULT hres;
 120     LPUNKNOWN punk;
 121
 122     TRACE("(%p)->(%p,%s,%p)\n",This,pOuter,debugstr_guid(riid),ppobj);
 123
 124     *ppobj = NULL;
 125     hres = This->pfnCreateInstance(pOuter, (LPVOID *) &punk);
 126     if (SUCCEEDED(hres)) {
 127         hres = IUnknown_QueryInterface(punk, riid, ppobj);
 128         IUnknown_Release(punk);
 129     }
 130     return hres;
 131 }
 132
 133 static HRESULT WINAPI AMCF_LockServer(LPCLASSFACTORY iface,BOOL dolock)
 134 {
 135     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 136     FIXME("(%p)->(%d),stub!\n",This,dolock);
 137     return S_OK;
 138 }
 139
 140 static const IClassFactoryVtbl DSCF_Vtbl =
 141 {
 142     AMCF_QueryInterface,
 143     AMCF_AddRef,
 144     AMCF_Release,
 145     AMCF_CreateInstance,
 146     AMCF_LockServer
 147 };
 148
 149 /*******************************************************************************
 150  * DllGetClassObject [AMSTREAM.@]
 151  * Retrieves class object from a DLL object
 152  *
 153  * NOTES
 154  *    Docs say returns STDAPI
 155  *
 156  * PARAMS
 157  *    rclsid [I] CLSID for the class object
 158  *    riid   [I] Reference to identifier of interface for class object
 159  *    ppv    [O] Address of variable to receive interface pointer for riid
 160  *
 161  * RETURNS
 162  *    Success: S_OK
 163  *    Failure: CLASS_E_CLASSNOTAVAILABLE, E_OUTOFMEMORY, E_INVALIDARG,
 164  *             E_UNEXPECTED
 165  */
 166 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
 167 {
 168     unsigned int i;
 169     IClassFactoryImpl *factory;
 170
 171     TRACE("(%s,%s,%p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
 172
 173     if ( !IsEqualGUID( &IID_IClassFactory, riid )
 174          && ! IsEqualGUID( &IID_IUnknown, riid) )
 175         return E_NOINTERFACE;
 176
 177     for (i=0; i < sizeof(object_creation)/sizeof(object_creation[0]); i++)
 178     {
 179         if (IsEqualGUID(object_creation[i].clsid, rclsid))
 180             break;
 181     }
 182
 183     if (i == sizeof(object_creation)/sizeof(object_creation[0]))
 184     {
 185         FIXME("%s: no class found.\n", debugstr_guid(rclsid));
 186         return CLASS_E_CLASSNOTAVAILABLE;
 187     }
 188
 189     factory = HeapAlloc(GetProcessHeap(), 0, sizeof(*factory));
 190     if (factory == NULL) return E_OUTOFMEMORY;
 191
 192     factory->ITF_IClassFactory.lpVtbl = &DSCF_Vtbl;
 193     factory->ref = 1;
 194
 195     factory->pfnCreateInstance = object_creation[i].pfnCreateInstance;
 196
 197     *ppv = &(factory->ITF_IClassFactory);
 198     return S_OK;
 199 }
 200
 201 /***********************************************************************
 202  *              DllCanUnloadNow (AMSTREAM.@)
 203  */
 204 HRESULT WINAPI DllCanUnloadNow(void)
 205 {
 206     return dll_ref != 0 ? S_FALSE : S_OK;
 207 }