xref: /reactos/dll/win32/mmdevapi/main.c (revision 465745b6) 
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 <stdarg.h>
21 
22 #define COBJMACROS
23 #include "windef.h"
24 #include "winbase.h"
25 #include "wingdi.h"
26 
27 #include "ole2.h"
28 #include "olectl.h"
29 #include "rpcproxy.h"
30 #include "propsys.h"
31 #include "propkeydef.h"
32 #include "mmdeviceapi.h"
33 #include "mmsystem.h"
34 #include "dsound.h"
35 #include "audioclient.h"
36 #include "endpointvolume.h"
37 #include "audiopolicy.h"
38 #include "devpkey.h"
39 #include "winreg.h"
40 
41 #include "mmdevapi.h"
42 #include "wine/debug.h"
43 
44 WINE_DEFAULT_DEBUG_CHANNEL(mmdevapi);
45 
46 static HINSTANCE instance;
47 
48 DriverFuncs drvs;
49 
50 const WCHAR drv_keyW[] = {'S','o','f','t','w','a','r','e','\\',
51     'W','i','n','e','\\','D','r','i','v','e','r','s',0};
52 
53 static const char *get_priority_string(int prio)
54 {
55     switch(prio){
56     case Priority_Unavailable:
57         return "Unavailable";
58     case Priority_Low:
59         return "Low";
60     case Priority_Neutral:
61         return "Neutral";
62     case Priority_Preferred:
63         return "Preferred";
64     }
65     return "Invalid";
66 }
67 
68 static BOOL load_driver(const WCHAR *name, DriverFuncs *driver)
69 {
70     WCHAR driver_module[264];
71     static const WCHAR wineW[] = {'w','i','n','e',0};
72     static const WCHAR dotdrvW[] = {'.','d','r','v',0};
73 
74     lstrcpyW(driver_module, wineW);
75     lstrcatW(driver_module, name);
76     lstrcatW(driver_module, dotdrvW);
77 
78     TRACE("Attempting to load %s\n", wine_dbgstr_w(driver_module));
79 
80     driver->module = LoadLibraryW(driver_module);
81     if(!driver->module){
82         TRACE("Unable to load %s: %u\n", wine_dbgstr_w(driver_module),
83                 GetLastError());
84         return FALSE;
85     }
86 
87 #define LDFC(n) do { driver->p##n = (void*)GetProcAddress(driver->module, #n);\
88         if(!driver->p##n) { FreeLibrary(driver->module); return FALSE; } } while(0)
89     LDFC(GetPriority);
90     LDFC(GetEndpointIDs);
91     LDFC(GetAudioEndpoint);
92     LDFC(GetAudioSessionManager);
93 #undef LDFC
94 
95     /* optional - do not fail if not found */
96     driver->pGetPropValue = (void*)GetProcAddress(driver->module, "GetPropValue");
97 
98     driver->priority = driver->pGetPriority();
99     lstrcpyW(driver->module_name, driver_module);
100 
101     TRACE("Successfully loaded %s with priority %s\n",
102             wine_dbgstr_w(driver_module), get_priority_string(driver->priority));
103 
104     return TRUE;
105 }
106 
107 static BOOL WINAPI init_driver(INIT_ONCE *once, void *param, void **context)
108 {
109     static const WCHAR drv_value[] = {'A','u','d','i','o',0};
110 
111     static WCHAR default_list[] = {'p','u','l','s','e',',','a','l','s','a',',','o','s','s',',',
112         'c','o','r','e','a','u','d','i','o',',','a','n','d','r','o','i','d',0};
113 
114     DriverFuncs driver;
115     HKEY key;
116     WCHAR reg_list[256], *p, *next, *driver_list = default_list;
117 
118     if(RegOpenKeyW(HKEY_CURRENT_USER, drv_keyW, &key) == ERROR_SUCCESS){
119         DWORD size = sizeof(reg_list);
120 
121         if(RegQueryValueExW(key, drv_value, 0, NULL, (BYTE*)reg_list,
122                     &size) == ERROR_SUCCESS){
123             if(reg_list[0] == '\0'){
124                 TRACE("User explicitly chose no driver\n");
125                 RegCloseKey(key);
126                 return TRUE;
127             }
128 
129             driver_list = reg_list;
130         }
131 
132         RegCloseKey(key);
133     }
134 
135     TRACE("Loading driver list %s\n", wine_dbgstr_w(driver_list));
136     for(next = p = driver_list; next; p = next + 1){
137         next = wcschr(p, ',');
138         if(next)
139             *next = '\0';
140 
141         driver.priority = Priority_Unavailable;
142         if(load_driver(p, &driver)){
143             if(driver.priority == Priority_Unavailable)
144                 FreeLibrary(driver.module);
145             else if(!drvs.module || driver.priority > drvs.priority){
146                 TRACE("Selecting driver %s with priority %s\n",
147                         wine_dbgstr_w(p), get_priority_string(driver.priority));
148                 if(drvs.module)
149                     FreeLibrary(drvs.module);
150                 drvs = driver;
151             }else
152                 FreeLibrary(driver.module);
153         }else
154             TRACE("Failed to load driver %s\n", wine_dbgstr_w(p));
155 
156         if(next)
157             *next = ',';
158     }
159 
160     return drvs.module != 0;
161 }
162 
163 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
164 {
165     TRACE("(0x%p, %d, %p)\n", hinstDLL, fdwReason, lpvReserved);
166 
167     switch (fdwReason)
168     {
169         case DLL_PROCESS_ATTACH:
170             instance = hinstDLL;
171             DisableThreadLibraryCalls(hinstDLL);
172             break;
173         case DLL_PROCESS_DETACH:
174             if(lpvReserved)
175                 break;
176             MMDevEnum_Free();
177             break;
178     }
179 
180     return TRUE;
181 }
182 
183 HRESULT WINAPI DllCanUnloadNow(void)
184 {
185     return S_FALSE;
186 }
187 
188 typedef HRESULT (*FnCreateInstance)(REFIID riid, LPVOID *ppobj);
189 
190 typedef struct {
191     IClassFactory IClassFactory_iface;
192     REFCLSID rclsid;
193     FnCreateInstance pfnCreateInstance;
194 } IClassFactoryImpl;
195 
196 static inline IClassFactoryImpl *impl_from_IClassFactory(IClassFactory *iface)
197 {
198     return CONTAINING_RECORD(iface, IClassFactoryImpl, IClassFactory_iface);
199 }
200 
201 static HRESULT WINAPI
202 MMCF_QueryInterface(IClassFactory *iface, REFIID riid, void **ppobj)
203 {
204     IClassFactoryImpl *This = impl_from_IClassFactory(iface);
205     TRACE("(%p, %s, %p)\n", This, debugstr_guid(riid), ppobj);
206     if (ppobj == NULL)
207         return E_POINTER;
208     if (IsEqualIID(riid, &IID_IUnknown) ||
209         IsEqualIID(riid, &IID_IClassFactory))
210     {
211         *ppobj = iface;
212         IClassFactory_AddRef(iface);
213         return S_OK;
214     }
215     *ppobj = NULL;
216     return E_NOINTERFACE;
217 }
218 
219 static ULONG WINAPI MMCF_AddRef(LPCLASSFACTORY iface)
220 {
221     return 2;
222 }
223 
224 static ULONG WINAPI MMCF_Release(LPCLASSFACTORY iface)
225 {
226     /* static class, won't be freed */
227     return 1;
228 }
229 
230 static HRESULT WINAPI MMCF_CreateInstance(
231     LPCLASSFACTORY iface,
232     LPUNKNOWN pOuter,
233     REFIID riid,
234     LPVOID *ppobj)
235 {
236     IClassFactoryImpl *This = impl_from_IClassFactory(iface);
237     TRACE("(%p, %p, %s, %p)\n", This, pOuter, debugstr_guid(riid), ppobj);
238 
239     if (pOuter)
240         return CLASS_E_NOAGGREGATION;
241 
242     if (ppobj == NULL) {
243         WARN("invalid parameter\n");
244         return E_POINTER;
245     }
246     *ppobj = NULL;
247     return This->pfnCreateInstance(riid, ppobj);
248 }
249 
250 static HRESULT WINAPI MMCF_LockServer(LPCLASSFACTORY iface, BOOL dolock)
251 {
252     IClassFactoryImpl *This = impl_from_IClassFactory(iface);
253     FIXME("(%p, %d) stub!\n", This, dolock);
254     return S_OK;
255 }
256 
257 static const IClassFactoryVtbl MMCF_Vtbl = {
258     MMCF_QueryInterface,
259     MMCF_AddRef,
260     MMCF_Release,
261     MMCF_CreateInstance,
262     MMCF_LockServer
263 };
264 
265 static IClassFactoryImpl MMDEVAPI_CF[] = {
266     { { &MMCF_Vtbl }, &CLSID_MMDeviceEnumerator, (FnCreateInstance)MMDevEnum_Create }
267 };
268 
269 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
270 {
271     static INIT_ONCE init_once = INIT_ONCE_STATIC_INIT;
272     unsigned int i = 0;
273     TRACE("(%s, %s, %p)\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
274 
275     if(!InitOnceExecuteOnce(&init_once, init_driver, NULL, NULL)) {
276         ERR("Driver initialization failed\n");
277         return E_FAIL;
278     }
279 
280     if (ppv == NULL) {
281         WARN("invalid parameter\n");
282         return E_INVALIDARG;
283     }
284 
285     *ppv = NULL;
286 
287     if (!IsEqualIID(riid, &IID_IClassFactory) &&
288         !IsEqualIID(riid, &IID_IUnknown)) {
289         WARN("no interface for %s\n", debugstr_guid(riid));
290         return E_NOINTERFACE;
291     }
292 
293     for (i = 0; i < ARRAY_SIZE(MMDEVAPI_CF); ++i)
294     {
295         if (IsEqualGUID(rclsid, MMDEVAPI_CF[i].rclsid)) {
296             IClassFactory_AddRef(&MMDEVAPI_CF[i].IClassFactory_iface);
297             *ppv = &MMDEVAPI_CF[i];
298             return S_OK;
299         }
300     }
301 
302     WARN("(%s, %s, %p): no class found.\n", debugstr_guid(rclsid),
303          debugstr_guid(riid), ppv);
304     return CLASS_E_CLASSNOTAVAILABLE;
305 }
306 
307 /***********************************************************************
308  *		DllRegisterServer (MMDEVAPI.@)
309  */
310 HRESULT WINAPI DllRegisterServer(void)
311 {
312     return __wine_register_resources( instance );
313 }
314 
315 /***********************************************************************
316  *		DllUnregisterServer (MMDEVAPI.@)
317  */
318 HRESULT WINAPI DllUnregisterServer(void)
319 {
320     return __wine_unregister_resources( instance );
321 }
322