dlls/amstream/main.c

   1 /*
   2  *     MultiMedia Streams Base Functions (AMSTREAM.DLL)
   3  *
   4  * Copyright 2004 Christian Costa
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <string.h>
  23
  24 #define COBJMACROS
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winuser.h"
  29 #include "winerror.h"
  30
  31 #include "ole2.h"
  32 #include "rpcproxy.h"
  33
  34 #include "amstream_private.h"
  35
  36 #include "wine/debug.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(amstream);
  39
  40 /******************************************************************************
  41  * Multimedia Streams ClassFactory
  42  */
  43 typedef struct {
  44     IClassFactory IClassFactory_iface;
  45     LONG ref;
  46     HRESULT (*pfnCreateInstance)(IUnknown *pUnkOuter, LPVOID *ppObj);
  47 } IClassFactoryImpl;
  48
  49 static inline IClassFactoryImpl *impl_from_IClassFactory(IClassFactory *iface)
  50 {
  51     return CONTAINING_RECORD(iface, IClassFactoryImpl, IClassFactory_iface);
  52 }
  53
  54 struct object_creation_info
  55 {
  56     const CLSID *clsid;
  57     HRESULT (*pfnCreateInstance)(IUnknown *pUnkOuter, LPVOID *ppObj);
  58 };
  59
  60 static const struct object_creation_info object_creation[] =
  61 {
  62     { &CLSID_AMMultiMediaStream, multimedia_stream_create },
  63     { &CLSID_AMDirectDrawStream, ddraw_stream_create },
  64     { &CLSID_AMAudioStream, audio_stream_create },
  65     { &CLSID_AMAudioData, AMAudioData_create },
  66     { &CLSID_MediaStreamFilter, filter_create }
  67 };
  68
  69 static HRESULT WINAPI AMCF_QueryInterface(IClassFactory *iface, REFIID riid, void **ppobj)
  70 {
  71     if (IsEqualGUID(riid, &IID_IUnknown)
  72         || IsEqualGUID(riid, &IID_IClassFactory))
  73     {
  74         IClassFactory_AddRef(iface);
  75         *ppobj = iface;
  76         return S_OK;
  77     }
  78
  79     *ppobj = NULL;
  80     WARN("(%p)->(%s,%p), not found\n", iface, debugstr_guid(riid), ppobj);
  81     return E_NOINTERFACE;
  82 }
  83
  84 static ULONG WINAPI AMCF_AddRef(IClassFactory *iface)
  85 {
  86     IClassFactoryImpl *This = impl_from_IClassFactory(iface);
  87     return InterlockedIncrement(&This->ref);
  88 }
  89
  90 static ULONG WINAPI AMCF_Release(IClassFactory *iface)
  91 {
  92     IClassFactoryImpl *This = impl_from_IClassFactory(iface);
  93     ULONG ref = InterlockedDecrement(&This->ref);
  94
  95     if (ref == 0)
  96         HeapFree(GetProcessHeap(), 0, This);
  97
  98     return ref;
  99 }
 100
 101
 102 static HRESULT WINAPI AMCF_CreateInstance(IClassFactory *iface, IUnknown *pOuter,
 103                                           REFIID riid, void **ppobj)
 104 {
 105     IClassFactoryImpl *This = impl_from_IClassFactory(iface);
 106     HRESULT hres;
 107     IUnknown *punk;
 108
 109     TRACE("(%p)->(%p,%s,%p)\n",This,pOuter,debugstr_guid(riid),ppobj);
 110
 111     *ppobj = NULL;
 112     hres = This->pfnCreateInstance(pOuter, (LPVOID *) &punk);
 113     if (SUCCEEDED(hres)) {
 114         hres = IUnknown_QueryInterface(punk, riid, ppobj);
 115         IUnknown_Release(punk);
 116     }
 117     return hres;
 118 }
 119
 120 static HRESULT WINAPI AMCF_LockServer(IClassFactory *iface, BOOL dolock)
 121 {
 122     IClassFactoryImpl *This = impl_from_IClassFactory(iface);
 123     FIXME("(%p)->(%d),stub!\n",This,dolock);
 124     return S_OK;
 125 }
 126
 127 static const IClassFactoryVtbl DSCF_Vtbl =
 128 {
 129     AMCF_QueryInterface,
 130     AMCF_AddRef,
 131     AMCF_Release,
 132     AMCF_CreateInstance,
 133     AMCF_LockServer
 134 };
 135
 136 /*******************************************************************************
 137  * DllGetClassObject [AMSTREAM.@]
 138  * Retrieves class object from a DLL object
 139  *
 140  * NOTES
 141  *    Docs say returns STDAPI
 142  *
 143  * PARAMS
 144  *    rclsid [I] CLSID for the class object
 145  *    riid   [I] Reference to identifier of interface for class object
 146  *    ppv    [O] Address of variable to receive interface pointer for riid
 147  *
 148  * RETURNS
 149  *    Success: S_OK
 150  *    Failure: CLASS_E_CLASSNOTAVAILABLE, E_OUTOFMEMORY, E_INVALIDARG,
 151  *             E_UNEXPECTED
 152  */
 153 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
 154 {
 155     unsigned int i;
 156     IClassFactoryImpl *factory;
 157
 158     TRACE("(%s,%s,%p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
 159
 160     if ( !IsEqualGUID( &IID_IClassFactory, riid )
 161          && ! IsEqualGUID( &IID_IUnknown, riid) )
 162         return E_NOINTERFACE;
 163
 164     for (i = 0; i < ARRAY_SIZE(object_creation); i++)
 165     {
 166         if (IsEqualGUID(object_creation[i].clsid, rclsid))
 167             break;
 168     }
 169
 170     if (i == ARRAY_SIZE(object_creation))
 171     {
 172         FIXME("%s: no class found.\n", debugstr_guid(rclsid));
 173         return CLASS_E_CLASSNOTAVAILABLE;
 174     }
 175
 176     factory = HeapAlloc(GetProcessHeap(), 0, sizeof(*factory));
 177     if (factory == NULL) return E_OUTOFMEMORY;
 178
 179     factory->IClassFactory_iface.lpVtbl = &DSCF_Vtbl;
 180     factory->ref = 1;
 181
 182     factory->pfnCreateInstance = object_creation[i].pfnCreateInstance;
 183
 184     *ppv = &factory->IClassFactory_iface;
 185     return S_OK;
 186 }