[PATCH 1/2] mmdevapi: Add code to enumerate NOTPRESENT devices

[Maarten Lankhorst]

---
 dlls/mmdevapi/devenum.c |   55 ++++++++++++++++++++++++++++++++++++++++++----
 1 files changed, 50 insertions(+), 5 deletions(-)

diff --git a/dlls/mmdevapi/devenum.c b/dlls/mmdevapi/devenum.c
index 40e296e..91eb028 100644
--- a/dlls/mmdevapi/devenum.c
+++ b/dlls/mmdevapi/devenum.c
@@ -24,6 +24,8 @@
 #define COBJMACROS
 #include "windef.h"
 #include "winbase.h"
+#include "winnls.h"
+#include "winreg.h"
 #include "wine/debug.h"
 
 #include "ole2.h"
@@ -33,6 +35,13 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(mmdevapi);
 
+static const WCHAR software_wine_mmdevapi[] =
+    { 'S','o','f','t','w','a','r','e','\\','W','i','n','e','\\','m','m','d','e','v','a','p','i',0};
+static const WCHAR inputguidstr[] =
+    { 'I','n','p','u','t','G','u','i','d',0 };
+static const WCHAR outputguidstr[] =
+    { 'O','u','t','p','u','t','G','u','i','d',0 };
+
 typedef struct MMDevEnumImpl
 {
     const IMMDeviceEnumeratorVtbl *lpVtbl;
@@ -41,27 +50,34 @@ typedef struct MMDevEnumImpl
 
 static MMDevEnumImpl *MMDevEnumerator;
 static const IMMDeviceEnumeratorVtbl MMDevEnumVtbl;
+static const IMMDeviceCollectionVtbl MMDevColVtbl;
 
 typedef struct MMDevColImpl
 {
     const IMMDeviceCollectionVtbl *lpVtbl;
     LONG ref;
-    MMDevEnumImpl *parent;
     EDataFlow flow;
     DWORD state;
 } MMDevColImpl;
-static const IMMDeviceCollectionVtbl MMDevColVtbl;
 
-static HRESULT MMDevCol_Create(IMMDeviceCollection **ppv, MMDevEnumImpl *parent, EDataFlow flow, DWORD state)
+/* Creates or updates the state of a device
+ * If GUID is null, a random guid will be assigned
+ */
+static void MMDevice_Create(WCHAR *name, GUID *guid, EDataFlow flow, DWORD state)
+{
+    FIXME("stub\n");
+}
+
+static HRESULT MMDevCol_Create(IMMDeviceCollection **ppv, EDataFlow flow, DWORD state)
 {
     MMDevColImpl *This;
+
     This = HeapAlloc(GetProcessHeap(), 0, sizeof(*This));
     *ppv = NULL;
     if (!This)
         return E_OUTOFMEMORY;
     This->lpVtbl = &MMDevColVtbl;
     This->ref = 1;
-    This->parent = parent;
     This->flow = flow;
     This->state = state;
     *ppv = (IMMDeviceCollection*)This;
@@ -143,6 +159,11 @@ HRESULT MMDevEnum_Create(REFIID riid, void **ppv)
 
     if (!This)
     {
+        DWORD len, i = 0;
+        HKEY root;
+        LONG ret;
+        WCHAR name[MAX_PATH];
+
         This = HeapAlloc(GetProcessHeap(), 0, sizeof(*This));
         *ppv = NULL;
         if (!This)
@@ -150,6 +171,30 @@ HRESULT MMDevEnum_Create(REFIID riid, void **ppv)
         This->ref = 1;
         This->lpVtbl = &MMDevEnumVtbl;
         MMDevEnumerator = This;
+
+        ret = RegOpenKeyExW(HKEY_CURRENT_USER, software_wine_mmdevapi, 0, KEY_READ, &root);
+        if (ret != ERROR_SUCCESS)
+            TRACE("Couldn't open key: %u\n", ret);
+        else do {
+            WCHAR guidvalue[39];
+            GUID guid;
+
+            len = sizeof(name);
+            ret = RegEnumKeyExW(root, i++, name, &len, NULL, NULL, NULL, NULL);
+            if (ret == ERROR_NO_MORE_ITEMS)
+                break;
+            if (ret != ERROR_SUCCESS)
+                continue;
+            len = sizeof(guidvalue);
+            ret = RegGetValueW(root, name, inputguidstr, RRF_RT_REG_SZ, NULL, guidvalue, &len);
+            if (ret == ERROR_SUCCESS && SUCCEEDED(CLSIDFromString(guidvalue, &guid)))
+                MMDevice_Create(name, &guid, eCapture, DEVICE_STATE_NOTPRESENT);
+            len = sizeof(guidvalue);
+            ret = RegGetValueW(root, name, outputguidstr, RRF_RT_REG_SZ, NULL, guidvalue, &len);
+            if (ret == ERROR_SUCCESS && SUCCEEDED(CLSIDFromString(guidvalue, &guid)))
+                MMDevice_Create(name, &guid, eRender, DEVICE_STATE_NOTPRESENT);
+        } while (1);
+        RegCloseKey(root);
     }
     return IUnknown_QueryInterface((IUnknown*)This, riid, ppv);
 }
@@ -206,7 +251,7 @@ static HRESULT WINAPI MMDevEnum_EnumAudioEndpoints(IMMDeviceEnumerator *iface, E
         return E_INVALIDARG;
     if (mask & ~DEVICE_STATEMASK_ALL)
         return E_INVALIDARG;
-    return MMDevCol_Create(devices, This, flow, mask);
+    return MMDevCol_Create(devices, flow, mask);
 }
 
 static HRESULT WINAPI MMDevEnum_GetDefaultAudioEndpoint(IMMDeviceEnumerator *iface, EDataFlow flow, ERole role, IMMDevice **device)
-- 
1.6.6