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     { &CLSID_MediaStreamFilter, MediaStreamFilter_create }
  79 };
  80
  81 static HRESULT WINAPI
  82 AMCF_QueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj)
  83 {
  84     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
  85
  86     if (IsEqualGUID(riid, &IID_IUnknown)
  87         || IsEqualGUID(riid, &IID_IClassFactory))
  88     {
  89         IClassFactory_AddRef(iface);
  90         *ppobj = This;
  91         return S_OK;
  92     }
  93
  94     WARN("(%p)->(%s,%p),not found\n",This,debugstr_guid(riid),ppobj);
  95     return E_NOINTERFACE;
  96 }
  97
  98 static ULONG WINAPI AMCF_AddRef(LPCLASSFACTORY iface)
  99 {
 100     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 101     return InterlockedIncrement(&This->ref);
 102 }
 103
 104 static ULONG WINAPI AMCF_Release(LPCLASSFACTORY iface)
 105 {
 106     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 107
 108     ULONG ref = InterlockedDecrement(&This->ref);
 109
 110     if (ref == 0)
 111         HeapFree(GetProcessHeap(), 0, This);
 112
 113     return ref;
 114 }
 115
 116
 117 static HRESULT WINAPI AMCF_CreateInstance(LPCLASSFACTORY iface, LPUNKNOWN pOuter,
 118                                           REFIID riid, LPVOID *ppobj)
 119 {
 120     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 121     HRESULT hres;
 122     LPUNKNOWN punk;
 123
 124     TRACE("(%p)->(%p,%s,%p)\n",This,pOuter,debugstr_guid(riid),ppobj);
 125
 126     *ppobj = NULL;
 127     hres = This->pfnCreateInstance(pOuter, (LPVOID *) &punk);
 128     if (SUCCEEDED(hres)) {
 129         hres = IUnknown_QueryInterface(punk, riid, ppobj);
 130         IUnknown_Release(punk);
 131     }
 132     return hres;
 133 }
 134
 135 static HRESULT WINAPI AMCF_LockServer(LPCLASSFACTORY iface,BOOL dolock)
 136 {
 137     IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
 138     FIXME("(%p)->(%d),stub!\n",This,dolock);
 139     return S_OK;
 140 }
 141
 142 static const IClassFactoryVtbl DSCF_Vtbl =
 143 {
 144     AMCF_QueryInterface,
 145     AMCF_AddRef,
 146     AMCF_Release,
 147     AMCF_CreateInstance,
 148     AMCF_LockServer
 149 };
 150
 151 /*******************************************************************************
 152  * DllGetClassObject [AMSTREAM.@]
 153  * Retrieves class object from a DLL object
 154  *
 155  * NOTES
 156  *    Docs say returns STDAPI
 157  *
 158  * PARAMS
 159  *    rclsid [I] CLSID for the class object
 160  *    riid   [I] Reference to identifier of interface for class object
 161  *    ppv    [O] Address of variable to receive interface pointer for riid
 162  *
 163  * RETURNS
 164  *    Success: S_OK
 165  *    Failure: CLASS_E_CLASSNOTAVAILABLE, E_OUTOFMEMORY, E_INVALIDARG,
 166  *             E_UNEXPECTED
 167  */
 168 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
 169 {
 170     unsigned int i;
 171     IClassFactoryImpl *factory;
 172
 173     TRACE("(%s,%s,%p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
 174
 175     if ( !IsEqualGUID( &IID_IClassFactory, riid )
 176          && ! IsEqualGUID( &IID_IUnknown, riid) )
 177         return E_NOINTERFACE;
 178
 179     for (i=0; i < sizeof(object_creation)/sizeof(object_creation[0]); i++)
 180     {
 181         if (IsEqualGUID(object_creation[i].clsid, rclsid))
 182             break;
 183     }
 184
 185     if (i == sizeof(object_creation)/sizeof(object_creation[0]))
 186     {
 187         FIXME("%s: no class found.\n", debugstr_guid(rclsid));
 188         return CLASS_E_CLASSNOTAVAILABLE;
 189     }
 190
 191     factory = HeapAlloc(GetProcessHeap(), 0, sizeof(*factory));
 192     if (factory == NULL) return E_OUTOFMEMORY;
 193
 194     factory->ITF_IClassFactory.lpVtbl = &DSCF_Vtbl;
 195     factory->ref = 1;
 196
 197     factory->pfnCreateInstance = object_creation[i].pfnCreateInstance;
 198
 199     *ppv = &(factory->ITF_IClassFactory);
 200     return S_OK;
 201 }
 202
 203 /***********************************************************************
 204  *              DllCanUnloadNow (AMSTREAM.@)
 205  */
 206 HRESULT WINAPI DllCanUnloadNow(void)
 207 {
 208     return dll_ref != 0 ? S_FALSE : S_OK;
 209 }