dll/win32/mmdevapi/main.c

   1 /*
   2  * Copyright 2009 Maarten Lankhorst
   3  * Copyright 2011 Andrew Eikum for CodeWeavers
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include "mmdevapi.h"
  21
  22 #include <rpcproxy.h>
  23
  24 static HINSTANCE instance;
  25
  26 DriverFuncs drvs;
  27
  28 const WCHAR drv_keyW[] = {'S','o','f','t','w','a','r','e','\\',
  29     'W','i','n','e','\\','D','r','i','v','e','r','s',0};
  30
  31 static const char *get_priority_string(int prio)
  32 {
  33     switch(prio){
  34     case Priority_Unavailable:
  35         return "Unavailable";
  36     case Priority_Low:
  37         return "Low";
  38     case Priority_Neutral:
  39         return "Neutral";
  40     case Priority_Preferred:
  41         return "Preferred";
  42     }
  43     return "Invalid";
  44 }
  45
  46 static BOOL load_driver(const WCHAR *name, DriverFuncs *driver)
  47 {
  48     WCHAR driver_module[264];
  49     static const WCHAR wineW[] = {'w','i','n','e',0};
  50     static const WCHAR dotdrvW[] = {'.','d','r','v',0};
  51
  52     lstrcpyW(driver_module, wineW);
  53     lstrcatW(driver_module, name);
  54     lstrcatW(driver_module, dotdrvW);
  55
  56     TRACE("Attempting to load %s\n", wine_dbgstr_w(driver_module));
  57
  58     driver->module = LoadLibraryW(driver_module);
  59     if(!driver->module){
  60         TRACE("Unable to load %s: %u\n", wine_dbgstr_w(driver_module),
  61                 GetLastError());
  62         return FALSE;
  63     }
  64
  65 #define LDFC(n) do { driver->p##n = (void*)GetProcAddress(driver->module, #n);\
  66         if(!driver->p##n) { FreeLibrary(driver->module); return FALSE; } } while(0)
  67     LDFC(GetPriority);
  68     LDFC(GetEndpointIDs);
  69     LDFC(GetAudioEndpoint);
  70     LDFC(GetAudioSessionManager);
  71 #undef LDFC
  72
  73     /* optional - do not fail if not found */
  74     driver->pGetPropValue = (void*)GetProcAddress(driver->module, "GetPropValue");
  75
  76     driver->priority = driver->pGetPriority();
  77     lstrcpyW(driver->module_name, driver_module);
  78
  79     TRACE("Successfully loaded %s with priority %s\n",
  80             wine_dbgstr_w(driver_module), get_priority_string(driver->priority));
  81
  82     return TRUE;
  83 }
  84
  85 static BOOL init_driver(void)
  86 {
  87     static const WCHAR drv_value[] = {'A','u','d','i','o',0};
  88
  89     static WCHAR default_list[] = {'p','u','l','s','e',',','a','l','s','a',',','o','s','s',',',
  90         'c','o','r','e','a','u','d','i','o',0};
  91
  92     DriverFuncs driver;
  93     HKEY key;
  94     WCHAR reg_list[256], *p, *next, *driver_list = default_list;
  95
  96     if(drvs.module)
  97         return TRUE;
  98
  99     if(RegOpenKeyW(HKEY_CURRENT_USER, drv_keyW, &key) == ERROR_SUCCESS){
 100         DWORD size = sizeof(reg_list);
 101
 102         if(RegQueryValueExW(key, drv_value, 0, NULL, (BYTE*)reg_list,
 103                     &size) == ERROR_SUCCESS){
 104             if(reg_list[0] == '\0'){
 105                 TRACE("User explicitly chose no driver\n");
 106                 RegCloseKey(key);
 107                 return TRUE;
 108             }
 109
 110             driver_list = reg_list;
 111         }
 112
 113         RegCloseKey(key);
 114     }
 115
 116     TRACE("Loading driver list %s\n", wine_dbgstr_w(driver_list));
 117     for(next = p = driver_list; next; p = next + 1){
 118         next = strchrW(p, ',');
 119         if(next)
 120             *next = '\0';
 121
 122         driver.priority = Priority_Unavailable;
 123         if(load_driver(p, &driver)){
 124             if(driver.priority == Priority_Unavailable)
 125                 FreeLibrary(driver.module);
 126             else if(!drvs.module || driver.priority > drvs.priority){
 127                 TRACE("Selecting driver %s with priority %s\n",
 128                         wine_dbgstr_w(p), get_priority_string(driver.priority));
 129                 if(drvs.module)
 130                     FreeLibrary(drvs.module);
 131                 drvs = driver;
 132             }else
 133                 FreeLibrary(driver.module);
 134         }else
 135             TRACE("Failed to load driver %s\n", wine_dbgstr_w(p));
 136
 137         if(next)
 138             *next = ',';
 139     }
 140
 141     return drvs.module != 0;
 142 }
 143
 144 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 145 {
 146     TRACE("(0x%p, %d, %p)\n", hinstDLL, fdwReason, lpvReserved);
 147
 148     switch (fdwReason)
 149     {
 150         case DLL_PROCESS_ATTACH:
 151             instance = hinstDLL;
 152             DisableThreadLibraryCalls(hinstDLL);
 153             break;
 154         case DLL_PROCESS_DETACH:
 155             if(lpvReserved)
 156                 break;
 157             MMDevEnum_Free();
 158             break;
 159     }
 160
 161     return TRUE;
 162 }
 163
 164 HRESULT WINAPI DllCanUnloadNow(void)
 165 {
 166     return S_FALSE;
 167 }
 168
 169 typedef HRESULT (*FnCreateInstance)(REFIID riid, LPVOID *ppobj);
 170
 171 typedef struct {
 172     IClassFactory IClassFactory_iface;
 173     REFCLSID rclsid;
 174     FnCreateInstance pfnCreateInstance;
 175 } IClassFactoryImpl;
 176
 177 static inline IClassFactoryImpl *impl_from_IClassFactory(IClassFactory *iface)
 178 {
 179     return CONTAINING_RECORD(iface, IClassFactoryImpl, IClassFactory_iface);
 180 }
 181
 182 static HRESULT WINAPI
 183 MMCF_QueryInterface(IClassFactory *iface, REFIID riid, void **ppobj)
 184 {
 185     IClassFactoryImpl *This = impl_from_IClassFactory(iface);
 186     TRACE("(%p, %s, %p)\n", This, debugstr_guid(riid), ppobj);
 187     if (ppobj == NULL)
 188         return E_POINTER;
 189     if (IsEqualIID(riid, &IID_IUnknown) ||
 190         IsEqualIID(riid, &IID_IClassFactory))
 191     {
 192         *ppobj = iface;
 193         IClassFactory_AddRef(iface);
 194         return S_OK;
 195     }
 196     *ppobj = NULL;
 197     return E_NOINTERFACE;
 198 }
 199
 200 static ULONG WINAPI MMCF_AddRef(LPCLASSFACTORY iface)
 201 {
 202     return 2;
 203 }
 204
 205 static ULONG WINAPI MMCF_Release(LPCLASSFACTORY iface)
 206 {
 207     /* static class, won't be freed */
 208     return 1;
 209 }
 210
 211 static HRESULT WINAPI MMCF_CreateInstance(
 212     LPCLASSFACTORY iface,
 213     LPUNKNOWN pOuter,
 214     REFIID riid,
 215     LPVOID *ppobj)
 216 {
 217     IClassFactoryImpl *This = impl_from_IClassFactory(iface);
 218     TRACE("(%p, %p, %s, %p)\n", This, pOuter, debugstr_guid(riid), ppobj);
 219
 220     if (pOuter)
 221         return CLASS_E_NOAGGREGATION;
 222
 223     if (ppobj == NULL) {
 224         WARN("invalid parameter\n");
 225         return E_POINTER;
 226     }
 227     *ppobj = NULL;
 228     return This->pfnCreateInstance(riid, ppobj);
 229 }
 230
 231 static HRESULT WINAPI MMCF_LockServer(LPCLASSFACTORY iface, BOOL dolock)
 232 {
 233     IClassFactoryImpl *This = impl_from_IClassFactory(iface);
 234     FIXME("(%p, %d) stub!\n", This, dolock);
 235     return S_OK;
 236 }
 237
 238 static const IClassFactoryVtbl MMCF_Vtbl = {
 239     MMCF_QueryInterface,
 240     MMCF_AddRef,
 241     MMCF_Release,
 242     MMCF_CreateInstance,
 243     MMCF_LockServer
 244 };
 245
 246 static IClassFactoryImpl MMDEVAPI_CF[] = {
 247     { { &MMCF_Vtbl }, &CLSID_MMDeviceEnumerator, (FnCreateInstance)MMDevEnum_Create }
 248 };
 249
 250 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
 251 {
 252     unsigned int i = 0;
 253     TRACE("(%s, %s, %p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
 254
 255     if(!init_driver()){
 256         ERR("Driver initialization failed\n");
 257         return E_FAIL;
 258     }
 259
 260     if (ppv == NULL) {
 261         WARN("invalid parameter\n");
 262         return E_INVALIDARG;
 263     }
 264
 265     *ppv = NULL;
 266
 267     if (!IsEqualIID(riid, &IID_IClassFactory) &&
 268         !IsEqualIID(riid, &IID_IUnknown)) {
 269         WARN("no interface for %s\n", debugstr_guid(riid));
 270         return E_NOINTERFACE;
 271     }
 272
 273     for (i = 0; i < sizeof(MMDEVAPI_CF)/sizeof(MMDEVAPI_CF[0]); ++i)
 274     {
 275         if (IsEqualGUID(rclsid, MMDEVAPI_CF[i].rclsid)) {
 276             IClassFactory_AddRef(&MMDEVAPI_CF[i].IClassFactory_iface);
 277             *ppv = &MMDEVAPI_CF[i];
 278             return S_OK;
 279         }
 280     }
 281
 282     WARN("(%s, %s, %p): no class found.\n", debugstr_guid(rclsid),
 283          debugstr_guid(riid), ppv);
 284     return CLASS_E_CLASSNOTAVAILABLE;
 285 }
 286
 287 /***********************************************************************
 288  *              DllRegisterServer (MMDEVAPI.@)
 289  */
 290 HRESULT WINAPI DllRegisterServer(void)
 291 {
 292     return __wine_register_resources( instance );
 293 }
 294
 295 /***********************************************************************
 296  *              DllUnregisterServer (MMDEVAPI.@)
 297  */
 298 HRESULT WINAPI DllUnregisterServer(void)
 299 {
 300     return __wine_unregister_resources( instance );
 301 }