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     { &CLSID_AMDirectDrawStream, AM_create },
  78 };
  79
  80 static HRESULT WINAPI
  81 AMCF_QueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj)
  82 {
  83     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
  84
  85     if (IsEqualGUID(riid, &IID_IUnknown)
  86         || IsEqualGUID(riid, &IID_IClassFactory))
  87     {
  88         IClassFactory_AddRef(iface);
  89         *ppobj = This;
  90         return S_OK;
  91     }
  92
  93     WARN("(%p)->(%s,%p),not found\n",This,debugstr_guid(riid),ppobj);
  94     return E_NOINTERFACE;
  95 }
  96
  97 static ULONG WINAPI AMCF_AddRef(LPCLASSFACTORY iface)
  98 {
  99     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 100     return InterlockedIncrement(&This->ref);
 101 }
 102
 103 static ULONG WINAPI AMCF_Release(LPCLASSFACTORY iface)
 104 {
 105     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 106
 107     ULONG ref = InterlockedDecrement(&This->ref);
 108
 109     if (ref == 0)
 110         HeapFree(GetProcessHeap(), 0, This);
 111
 112     return ref;
 113 }
 114
 115
 116 static HRESULT WINAPI AMCF_CreateInstance(LPCLASSFACTORY iface, LPUNKNOWN pOuter,
 117                                           REFIID riid, LPVOID *ppobj)
 118 {
 119     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 120     HRESULT hres;
 121     LPUNKNOWN punk;
 122
 123     TRACE("(%p)->(%p,%s,%p)\n",This,pOuter,debugstr_guid(riid),ppobj);
 124
 125     *ppobj = NULL;
 126     hres = This->pfnCreateInstance(pOuter, (LPVOID *) &punk);
 127     if (SUCCEEDED(hres)) {
 128         hres = IUnknown_QueryInterface(punk, riid, ppobj);
 129         IUnknown_Release(punk);
 130     }
 131     return hres;
 132 }
 133
 134 static HRESULT WINAPI AMCF_LockServer(LPCLASSFACTORY iface,BOOL dolock)
 135 {
 136     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 137     FIXME("(%p)->(%d),stub!\n",This,dolock);
 138     return S_OK;
 139 }
 140
 141 static const IClassFactoryVtbl DSCF_Vtbl =
 142 {
 143     AMCF_QueryInterface,
 144     AMCF_AddRef,
 145     AMCF_Release,
 146     AMCF_CreateInstance,
 147     AMCF_LockServer
 148 };
 149
 150 /*******************************************************************************
 151  * DllGetClassObject [AMSTREAM.@]
 152  * Retrieves class object from a DLL object
 153  *
 154  * NOTES
 155  *    Docs say returns STDAPI
 156  *
 157  * PARAMS
 158  *    rclsid [I] CLSID for the class object
 159  *    riid   [I] Reference to identifier of interface for class object
 160  *    ppv    [O] Address of variable to receive interface pointer for riid
 161  *
 162  * RETURNS
 163  *    Success: S_OK
 164  *    Failure: CLASS_E_CLASSNOTAVAILABLE, E_OUTOFMEMORY, E_INVALIDARG,
 165  *             E_UNEXPECTED
 166  */
 167 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
 168 {
 169     unsigned int i;
 170     IClassFactoryImpl *factory;
 171
 172     TRACE("(%s,%s,%p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
 173
 174     if ( !IsEqualGUID( &IID_IClassFactory, riid )
 175          && ! IsEqualGUID( &IID_IUnknown, riid) )
 176         return E_NOINTERFACE;
 177
 178     for (i=0; i < sizeof(object_creation)/sizeof(object_creation[0]); i++)
 179     {
 180         if (IsEqualGUID(object_creation[i].clsid, rclsid))
 181             break;
 182     }
 183
 184     if (i == sizeof(object_creation)/sizeof(object_creation[0]))
 185     {
 186         FIXME("%s: no class found.\n", debugstr_guid(rclsid));
 187         return CLASS_E_CLASSNOTAVAILABLE;
 188     }
 189
 190     factory = HeapAlloc(GetProcessHeap(), 0, sizeof(*factory));
 191     if (factory == NULL) return E_OUTOFMEMORY;
 192
 193     factory->ITF_IClassFactory.lpVtbl = &DSCF_Vtbl;
 194     factory->ref = 1;
 195
 196     factory->pfnCreateInstance = object_creation[i].pfnCreateInstance;
 197
 198     *ppv = &(factory->ITF_IClassFactory);
 199     return S_OK;
 200 }
 201
 202 /***********************************************************************
 203  *              DllCanUnloadNow (AMSTREAM.@)
 204  */
 205 HRESULT WINAPI DllCanUnloadNow(void)
 206 {
 207     return dll_ref != 0 ? S_FALSE : S_OK;
 208 }