[ros-diffs] [silverblade] 29100: ReactOS Audio Service. Has not been tested within ReactOS but on Windows (XP) it now detects when new devices have been attached. This information is shared via a mapped file. I have also written a utility to read the contents of the mapped file (this is not included - further work is required). Added a few missing #defines to dbt.h and also reformatted some of the WinMM code so it was clearer to read.

Author: silverblade
Date: Wed Sep 19 08:13:24 2007
New Revision: 29100

URL: http://svn.reactos.org/svn/reactos?rev=29100&view=rev
Log:
ReactOS Audio Service. Has not been tested within ReactOS but on Windows 
(XP) it now detects when new devices have been attached. This 
information is shared via a mapped file. I have also written a utility 
to read the contents of the mapped file (this is not included - further 
work is required).

Added a few missing #defines to dbt.h and also reformatted some of the 
WinMM code so it was clearer to read.


Added:
    trunk/reactos/base/services/audiosrv/pnp_list_lock.c
    trunk/reactos/base/services/audiosrv/pnp_list_manager.c
    trunk/reactos/base/services/audiosrv/pnp_list_manager.h
    trunk/reactos/include/reactos/libs/audiosrv/
    trunk/reactos/include/reactos/libs/audiosrv/audiosrv.h
Modified:
    trunk/reactos/base/services/audiosrv/audiosrv.rbuild
    trunk/reactos/base/services/audiosrv/main.c
    trunk/reactos/dll/win32/winmm/driver.c
    trunk/reactos/dll/win32/winmm/lolvldrv.c
    trunk/reactos/include/psdk/dbt.h

Modified: trunk/reactos/base/services/audiosrv/audiosrv.rbuild
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/services/audiosrv/aud…
==============================================================================
--- trunk/reactos/base/services/audiosrv/audiosrv.rbuild (original)
+++ trunk/reactos/base/services/audiosrv/audiosrv.rbuild Wed Sep 19 08:13:24 2007
@@ -1,10 +1,16 @@
-<module name="audiosrv" type="win32cui"
installbase="system32" installname="audiosrv.exe"
allowwarnings="true">
+<module name="audiosrv" type="win32cui"
installbase="system32" 
+installname="audiosrv.exe" allowwarnings="true">
 	<include base="audiosrv">.</include>
+	<define name="UNICODE" />
 	<define name="__USE_W32API" />
 	<define name="__REACTOS__" />
 	<define name="_WIN32_WINNT">0x0501</define>
+	<define name="WINVER">0x0501</define>
 	<library>kernel32</library>
 	<library>advapi32</library>
+	<library>user32</library>
 	<file>main.c</file>
+	<file>pnp_list_manager.c</file>
+	<file>pnp_list_lock.c</file>
 	<file>audiosrv.rc</file>
 </module>

Modified: trunk/reactos/base/services/audiosrv/main.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/services/audiosrv/mai…
==============================================================================
--- trunk/reactos/base/services/audiosrv/main.c (original)
+++ trunk/reactos/base/services/audiosrv/main.c Wed Sep 19 08:13:24 2007
@@ -7,16 +7,12 @@
  */
 
 #include <windows.h>
+#include <winuser.h>
+#include <dbt.h>
+#include <audiosrv/audiosrv.h>
+#include <pnp_list_manager.h>
 
-/* This is currently set to avoid conflicting service names in Windows! */
-#define SERVICE_NAME                "RosAudioSrv"
-
-/* A named mutex is used for synchronizing access to the device list.
-   If this mutex doesn't exist, it means the audio service isn't running. */
-#define DEVICE_LIST_MUTEX_NAME      "Global\\AudioDeviceListSync"
-
-/* ...and this is where the device list will be available */
-#define DEVICE_LIST_MAPPED_FILENAME "Global\\AudioDeviceList"
+#include <ksmedia.h>
 
 
 
@@ -25,19 +21,23 @@
 VOID CALLBACK
 ServiceMain(DWORD argc, char** argv);
 
-VOID WINAPI
-ServiceControlHandler(DWORD request);
-
+DWORD WINAPI
+ServiceControlHandler(
+    DWORD dwControl,
+    DWORD dwEventType,
+    LPVOID lpEventData,
+    LPVOID lpContext);
 
 /* Service table */
 SERVICE_TABLE_ENTRY service_table[2] =
 {
-    { "AudioSrv", (LPSERVICE_MAIN_FUNCTION) ServiceMain },
+    { L"AudioSrv", (LPSERVICE_MAIN_FUNCTION) ServiceMain },
     { NULL, NULL }
 };
 
 SERVICE_STATUS_HANDLE service_status_handle;
 SERVICE_STATUS service_status;
+HDEVNOTIFY device_notification_handle = NULL;
 
 /* Synchronization of access to the event list */
 HANDLE device_list_mutex = INVALID_HANDLE_VALUE;
@@ -45,40 +45,109 @@
 
 /* Implementation */
 
-VOID WINAPI
-ServiceControlHandler(DWORD request)
+DWORD
+ProcessDeviceArrival(DEV_BROADCAST_DEVICEINTERFACE* device)
 {
-    switch ( request )
+    PnP_AudioDevice* list_node;
+    list_node = CreateDeviceDescriptor(device->dbcc_name, TRUE);
+    AppendAudioDeviceToList(list_node);
+    DestroyDeviceDescriptor(list_node);
+
+    return NO_ERROR;
+}
+
+DWORD WINAPI
+ServiceControlHandler(
+    DWORD dwControl,
+    DWORD dwEventType,
+    LPVOID lpEventData,
+    LPVOID lpContext)
+{
+    switch ( dwControl )
     {
+        case SERVICE_CONTROL_INTERROGATE :
+        {
+            return NO_ERROR;
+        }
+
         case SERVICE_CONTROL_STOP :
         case SERVICE_CONTROL_SHUTDOWN :
         {
+            /* FIXME: This function doesn't exist?! */
+/*
+            UnregisterDeviceNotification(device_notification_handle);
+            device_notification_handle = NULL;
+*/
+
+            DestroyAudioDeviceList();
+
             service_status.dwCurrentState = SERVICE_STOP_PENDING;
             SetServiceStatus(service_status_handle, &service_status);
-
-            CloseHandle(device_list_mutex);
 
             service_status.dwWin32ExitCode = 0;
             service_status.dwCurrentState = SERVICE_STOPPED;
 
             SetServiceStatus(service_status_handle, &service_status);
 
-            return;
+            return NO_ERROR;
         }
 
+        case SERVICE_CONTROL_DEVICEEVENT :
+        {
+            switch ( dwEventType )
+            {
+                case DBT_DEVICEARRIVAL :
+                {
+                    DEV_BROADCAST_DEVICEINTERFACE* incoming_device =
+                        (DEV_BROADCAST_DEVICEINTERFACE*) lpEventData;
+
+                    return ProcessDeviceArrival(incoming_device);
+                }
+
+                default :
+                {
+                    break;
+                }
+            }
+
+            return NO_ERROR;
+        }
 
         default :
-            break;
+            return ERROR_CALL_NOT_IMPLEMENTED;
     };
 
-    SetServiceStatus(service_status_handle, &service_status);
+    /*SetServiceStatus(service_status_handle, &service_status);*/
+}
+
+BOOL
+RegisterForDeviceNotifications()
+{
+    DEV_BROADCAST_DEVICEINTERFACE notification_filter;
+
+    const GUID wdmaud_guid = {STATIC_KSCATEGORY_WDMAUD};
+
+    /* FIXME: This currently lists ALL device interfaces... */
+    ZeroMemory(&notification_filter, sizeof(notification_filter));
+    notification_filter.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
+    notification_filter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
+    notification_filter.dbcc_classguid = wdmaud_guid;
+
+    device_notification_handle =
+        RegisterDeviceNotification((HANDLE) service_status_handle,
+                                   &notification_filter,
+                                   DEVICE_NOTIFY_SERVICE_HANDLE |
+                                   DEVICE_NOTIFY_ALL_INTERFACE_CLASSES);
+
+    return ( device_notification_handle != NULL );
 }
 
 VOID CALLBACK
 ServiceMain(DWORD argc, char** argv)
 {
-    service_status_handle = RegisterServiceCtrlHandler(SERVICE_NAME,
-                                                       ServiceControlHandler);
+    service_status_handle = RegisterServiceCtrlHandlerEx(SERVICE_NAME,
+                                                         ServiceControlHandler,
+                                                         NULL);
 
     /* Set these to defaults */
     service_status.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
@@ -92,15 +161,22 @@
     service_status.dwCurrentState = SERVICE_START_PENDING;
     SetServiceStatus(service_status_handle, &service_status);
 
-    /* We should create the mapped section here along with the mutex to
-       sync access to the device list... */
-
-    device_list_mutex = CreateMutex(NULL, FALSE, DEVICE_LIST_MUTEX_NAME);
-
-    if ( ! device_list_mutex)
+    /* This creates the audio device list and mutex */
+    if ( ! CreateAudioDeviceList(AUDIO_LIST_MAX_SIZE) )
     {
         service_status.dwCurrentState = SERVICE_STOPPED;
-        service_status.dwWin32ExitCode = -1;    // ok?
+        service_status.dwWin32ExitCode = -1;
+        SetServiceStatus(service_status_handle, &service_status);
+        return;
+    }
+
+    /* We want to know when devices are added/removed */
+    if ( ! RegisterForDeviceNotifications() )
+    {
+        DestroyAudioDeviceList();
+
+        service_status.dwCurrentState = SERVICE_STOPPED;
+        service_status.dwWin32ExitCode = -1;
         SetServiceStatus(service_status_handle, &service_status);
         return;
     }
@@ -114,4 +190,5 @@
 int main()
 {
     StartServiceCtrlDispatcher(service_table);
+    return 0;
 }

Added: trunk/reactos/base/services/audiosrv/pnp_list_lock.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/services/audiosrv/pnp…
==============================================================================
--- trunk/reactos/base/services/audiosrv/pnp_list_lock.c (added)
+++ trunk/reactos/base/services/audiosrv/pnp_list_lock.c Wed Sep 19 08:13:24 2007
@@ -1,0 +1,58 @@
+/*
+ * PROJECT:          ReactOS
+ * LICENSE:          GPL - See COPYING in the top level directory
+ * FILE:             base/services/audiosrv/list_lock.c
+ * PURPOSE:          Audio Service Plug and Play list locking mechanism
+ * COPYRIGHT:        Copyright 2007 Andrew Greenwood
+ */
+
+#include <windows.h>
+#include <assert.h>
+#include <audiosrv/audiosrv.h>
+
+static HANDLE audio_device_list_lock = NULL;
+
+BOOL
+InitializeAudioDeviceListLock()
+{
+    /* The security stuff is to make sure the mutex can be grabbed by
+       other processes - is this the best idea though ??? */
+
+    SECURITY_DESCRIPTOR security_descriptor;
+    SECURITY_ATTRIBUTES security;
+
+    InitializeSecurityDescriptor(&security_descriptor,
SECURITY_DESCRIPTOR_REVISION);
+    SetSecurityDescriptorDacl(&security_descriptor, TRUE, 0, FALSE);
+
+    security.nLength = sizeof(SECURITY_ATTRIBUTES);
+    security.lpSecurityDescriptor = &security_descriptor;
+    security.bInheritHandle = FALSE;
+
+    audio_device_list_lock = CreateMutex(&security,
+                                         FALSE,
+                                         AUDIO_LIST_LOCK_NAME);
+
+    return ( audio_device_list_lock != NULL );
+}
+
+VOID
+KillAudioDeviceListLock()
+{
+    CloseHandle(audio_device_list_lock);
+    audio_device_list_lock = NULL;
+}
+
+VOID
+LockAudioDeviceList()
+{
+    assert( audio_device_list_lock != NULL );
+    WaitForSingleObject(audio_device_list_lock, INFINITE);
+}
+
+VOID
+UnlockAudioDeviceList()
+{
+    assert( audio_device_list_lock != NULL );
+    ReleaseMutex(audio_device_list_lock);
+}
+

Added: trunk/reactos/base/services/audiosrv/pnp_list_manager.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/services/audiosrv/pnp…
==============================================================================
--- trunk/reactos/base/services/audiosrv/pnp_list_manager.c (added)
+++ trunk/reactos/base/services/audiosrv/pnp_list_manager.c Wed Sep 19 08:13:24 2007
@@ -1,0 +1,173 @@
+/*
+ * PROJECT:          ReactOS
+ * LICENSE:          GPL - See COPYING in the top level directory
+ * FILE:             base/services/audiosrv/pnp_list_manager.c
+ * PURPOSE:          Audio Service List Manager
+ * COPYRIGHT:        Copyright 2007 Andrew Greenwood
+ */
+
+#include <assert.h>
+#include <audiosrv/audiosrv.h>
+
+
+/*
+    Device descriptor
+*/
+
+VOID*
+CreateDeviceDescriptor(WCHAR* path, BOOL is_enabled)
+{
+    PnP_AudioDevice* device;
+
+    int path_length = WideStringSize(path);
+    int size = sizeof(PnP_AudioDevice) + path_length;
+
+/*    printf("path_length %d, total %d\n", path_length, size);*/
+
+    device = malloc(size);
+
+    if ( ! device )
+        return NULL;
+
+    device->enabled = is_enabled;
+    memcpy(device->path, path, path_length);
+
+    return device;
+}
+
+
+/*
+    Device list (manager-side)
+
+    The device list is stored in some shared-memory, with a named, global
+    mutex to provide a locking mechanism (to avoid it from being updated
+    whilst being read).
+*/
+
+static HANDLE device_list_file = NULL;
+static PnP_AudioHeader* audio_device_list = NULL;
+
+BOOL
+AppendAudioDeviceToList(PnP_AudioDevice* device)
+{
+    int device_info_size;
+
+    /* Figure out the actual structure size */
+    device_info_size = sizeof(PnP_AudioDevice);
+    device_info_size += WideStringSize(device->path);
+
+    LockAudioDeviceList();
+
+/*
+    printf("list size is %d\n", audio_device_list->size);
+    printf("device info size is %d bytes\n", device_info_size);
+*/
+
+    /* We DON'T want to overshoot the end of the buffer! */
+    if ( audio_device_list->size + device_info_size >
audio_device_list->max_size )
+    {
+/*
+        printf("max_size would be exceeded! failing\n");
+*/
+        return FALSE;
+    }
+
+    /* Commit the device descriptor to the list */
+    memcpy((char*)audio_device_list + audio_device_list->size,
+           device,
+           device_info_size);
+
+    /* Update the header */
+    audio_device_list->device_count ++;
+    audio_device_list->size += device_info_size;
+
+    UnlockAudioDeviceList();
+
+    return TRUE;
+}
+
+BOOL
+CreateAudioDeviceList(DWORD max_size)
+{
+/*    printf("Initializing memory device list lock\n");*/
+
+    if ( ! InitializeAudioDeviceListLock() )
+    {
+        /*printf("Failed!\n");*/
+        return FALSE;
+    }
+
+    /* Preliminary locking - the list memory will likely be a big
+       buffer of gibberish at this point so we don't want anyone
+       turning up before we're ready... */
+    LockAudioDeviceList();
+
+    /* Expose our device list to the world */
+    device_list_file = CreateFileMapping(INVALID_HANDLE_VALUE,
+                                         NULL,
+                                         PAGE_READWRITE,
+                                         0,
+                                         max_size,
+                                         AUDIO_LIST_NAME);
+
+    if ( ! device_list_file )
+    {
+        /*printf("Creation of audio device list FAILED!\n");*/
+
+        UnlockAudioDeviceList();
+        KillAudioDeviceListLock();
+
+        return FALSE;
+    }
+
+    /* Of course, we'll need to access the list ourselves */
+    audio_device_list = MapViewOfFile(device_list_file,
+                                      FILE_MAP_WRITE,
+                                      0,
+                                      0,
+                                      max_size);
+
+    if ( ! audio_device_list )
+    {
+        /*printf("MapViewOfFile FAILED\n");*/
+
+        CloseHandle(device_list_file);
+        device_list_file = NULL;
+
+        UnlockAudioDeviceList();
+        KillAudioDeviceListLock();
+
+        return FALSE;
+    }
+
+    /* Clear the mem to avoid any random stray data */
+    memset(audio_device_list, 0, max_size);
+
+    /* Don't want devices to overwrite the list! */
+    audio_device_list->size = sizeof(PnP_AudioHeader);
+    audio_device_list->max_size = max_size;
+    audio_device_list->device_count = 0;
+
+    UnlockAudioDeviceList();
+
+    return TRUE;
+}
+
+VOID
+DestroyAudioDeviceList()
+{
+    LockAudioDeviceList();
+
+    /*printf("Unmapping view\n");*/
+    UnmapViewOfFile(audio_device_list);
+    audio_device_list = NULL;
+
+    /*printf("Closing memory mapped file\n");*/
+    CloseHandle(device_list_file);
+    device_list_file = NULL;
+
+    UnlockAudioDeviceList();
+
+    /*printf("Killing devlist lock\n");*/
+    KillAudioDeviceListLock();
+}

Added: trunk/reactos/base/services/audiosrv/pnp_list_manager.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/services/audiosrv/pnp…
==============================================================================
--- trunk/reactos/base/services/audiosrv/pnp_list_manager.h (added)
+++ trunk/reactos/base/services/audiosrv/pnp_list_manager.h Wed Sep 19 08:13:24 2007
@@ -1,0 +1,29 @@
+/*
+ * PROJECT:          ReactOS
+ * LICENSE:          GPL - See COPYING in the top level directory
+ * FILE:             base/services/audiosrv/pnp_list_manager.h
+ * PURPOSE:          Audio Service List Manager
+ * COPYRIGHT:        Copyright 2007 Andrew Greenwood
+ */
+
+#include <assert.h>
+#include <audiosrv/audiosrv.h>
+
+#ifndef PNP_LIST_MANAGER_H
+#define PNP_LIST_MANAGER_H
+
+VOID*
+CreateDeviceDescriptor(WCHAR* path, BOOL is_enabled);
+
+#define DestroyDeviceDescriptor(descriptor) free(descriptor)
+
+BOOL
+AppendAudioDeviceToList(PnP_AudioDevice* device);
+
+BOOL
+CreateAudioDeviceList(DWORD max_size);
+
+VOID
+DestroyAudioDeviceList();
+
+#endif

Modified: trunk/reactos/dll/win32/winmm/driver.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/winmm/driver.c?r…
==============================================================================
--- trunk/reactos/dll/win32/winmm/driver.c (original)
+++ trunk/reactos/dll/win32/winmm/driver.c Wed Sep 19 08:13:24 2007
@@ -4,6 +4,8 @@
  * Copyright 1994 Martin Ayotte
  * Copyright 1998 Marcus Meissner
  * Copyright 1999 Eric Pouech
+ *
+ * Reformatting and additional comments added by Andrew Greenwood.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -213,17 +215,29 @@
     static const WCHAR wszSystemIni[] =
{'S','Y','S','T','E','M','.','I','N','I',0};
     WCHAR       wsznull = '\0';
 
+    /* This takes us as far as Windows NT\CurrentVersion */
     lRet = RegOpenKeyExW(HKEY_LOCAL_MACHINE, HKLM_BASE, 0, KEY_QUERY_VALUE, &hKey);
-    if (lRet == ERROR_SUCCESS) {
-	lRet = RegOpenKeyExW(hKey, sectName, 0, KEY_QUERY_VALUE, &hSecKey);
-	if (lRet == ERROR_SUCCESS) {
+
+    if (lRet == ERROR_SUCCESS)
+    {
+        /* Now we descend into the section name that we were given */
+	    lRet = RegOpenKeyExW(hKey, sectName, 0, KEY_QUERY_VALUE, &hSecKey);
+
+	    if (lRet == ERROR_SUCCESS)
+        {
+            /* Retrieve the desired value - this is the filename of the lib */
             bufLen = sz;
-	    lRet = RegQueryValueExW(hSecKey, keyName, 0, 0, (void*)buf, &bufLen);
-	    RegCloseKey( hSecKey );
-	}
+	        lRet = RegQueryValueExW(hSecKey, keyName, 0, 0, (void*)buf, &bufLen);
+	        RegCloseKey( hSecKey );
+	    }
+
         RegCloseKey( hKey );
     }
-    if (lRet == ERROR_SUCCESS) return TRUE;
+
+    /* Finish up if we've got what we want from the registry */
+    if (lRet == ERROR_SUCCESS)
+        return TRUE;
+
     /* default to system.ini if we can't find it in the registry,
      * to support native installations where system.ini is still used */
     return GetPrivateProfileStringW(sectName, keyName, &wsznull, buf, sz /
sizeof(WCHAR), wszSystemIni);
@@ -243,19 +257,38 @@
 
     TRACE("(%s, %08lX);\n", debugstr_w(fn), lParam2);
 
-    if ((ptr = strchrW(fn, ' ')) != NULL) {
-	*ptr++ = '\0';
-	while (*ptr == ' ') ptr++;
-	if (*ptr == '\0') ptr = NULL;
+    if ((ptr = strchrW(fn, ' ')) != NULL)
+    {
+        *ptr++ = '\0';
+
+        while (*ptr == ' ')
+            ptr++;
+
+        if (*ptr == '\0')
+            ptr = NULL;
     }
 
     lpDrv = HeapAlloc(GetProcessHeap(), 0, sizeof(WINE_DRIVER));
-    if (lpDrv == NULL) {cause = "OOM"; goto exit;}
-
-    if ((hModule = LoadLibraryW(fn)) == 0) {cause = "Not a 32 bit lib"; goto
exit;}
+
+    if (lpDrv == NULL)
+    {
+        cause = "OOM";
+        goto exit;
+    }
+
+    if ((hModule = LoadLibraryW(fn)) == 0)
+    {
+        cause = "Not a 32 bit lib";
+        goto exit;
+    }
 
     lpDrv->d.d32.lpDrvProc = (DRIVERPROC)GetProcAddress(hModule,
"DriverProc");
-    if (lpDrv->d.d32.lpDrvProc == NULL) {cause = "no DriverProc"; goto
exit;}
+
+    if (lpDrv->d.d32.lpDrvProc == NULL)
+    {
+        cause = "no DriverProc";
+        goto exit;
+    }
 
     lpDrv->dwFlags          = 0;
     lpDrv->d.d32.hModule    = hModule;
@@ -285,10 +318,14 @@
     }
 
     if (!DRIVER_AddToList(lpDrv, (LPARAM)ptr, lParam2))
-    {cause = "load failed"; goto exit;}
+    {
+        cause = "load failed";
+        goto exit;
+    }
 
     TRACE("=> %p\n", lpDrv);
     return lpDrv;
+
  exit:
     FreeLibrary(hModule);
     HeapFree(GetProcessHeap(), 0, lpDrv);
@@ -347,17 +384,32 @@
     TRACE("(%s, %s, 0x%08lx);\n", 
           debugstr_w(lpDriverName), debugstr_w(lpSectionName), lParam);
 
-    if (lsn == NULL) {
+    /* If no section name is specified, either the caller is intending on
+       opening a driver by filename, or wants to open a user-installable
+       driver that has an entry in the Drivers32 key in the registry */
+    if (lsn == NULL)
+    {
+        /* Default registry key */
         static const WCHAR wszDrivers32[] =
{'D','r','i','v','e','r','s','3','2',0};
-	lstrcpynW(libName, lpDriverName, sizeof(libName) / sizeof(WCHAR));
-
-	if ((lpDrv = DRIVER_TryOpenDriver32(libName, lParam)))
-	    goto the_end;
-	lsn = wszDrivers32;
-    }
-    if (DRIVER_GetLibName(lpDriverName, lsn, libName, sizeof(libName)) &&
-	(lpDrv = DRIVER_TryOpenDriver32(libName, lParam)))
-	goto the_end;
+
+        lstrcpynW(libName, lpDriverName, sizeof(libName) / sizeof(WCHAR));
+
+        /* Try and open the driver by filename */
+        if ( lpDrv = DRIVER_TryOpenDriver32(libName, lParam) )
+            goto the_end;
+
+        /* If we got here, the file wasn't found. So we assume the caller
+           wanted a driver specified under the Drivers32 registry key */
+        lsn = wszDrivers32;
+    }
+
+    /* Attempt to locate the driver filename in the registry */
+    if ( DRIVER_GetLibName(lpDriverName, lsn, libName, sizeof(libName)) )
+    {
+        /* Now we have the filename, we can try and load it */
+        if ( lpDrv = DRIVER_TryOpenDriver32(libName, lParam) )
+            goto the_end;
+    }
 
     /* now we will try a 16 bit driver (and add all the glue to make it work... which
      * is located in our mmsystem implementation)

Modified: trunk/reactos/dll/win32/winmm/lolvldrv.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/winmm/lolvldrv.c…
==============================================================================
--- trunk/reactos/dll/win32/winmm/lolvldrv.c (original)
+++ trunk/reactos/dll/win32/winmm/lolvldrv.c Wed Sep 19 08:13:24 2007
@@ -4,6 +4,7 @@
  * MMSYTEM low level drivers handling functions
  *
  * Copyright 1999 Eric Pouech
+ * Modified for use with ReactOS by Andrew Greenwood, 2007
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public

Modified: trunk/reactos/include/psdk/dbt.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/include/psdk/dbt.h?rev=291…
==============================================================================
--- trunk/reactos/include/psdk/dbt.h (original)
+++ trunk/reactos/include/psdk/dbt.h Wed Sep 19 08:13:24 2007
@@ -20,6 +20,7 @@
 #define DBT_DEVTYP_VOLUME	2
 #define DBT_DEVTYP_PORT	3
 #define DBT_DEVTYP_NET	4
+#define DBT_DEVTYP_DEVICEINTERFACE  5
 #define DBT_APPYBEGIN 0
 #define DBT_APPYEND 1
 #define DBT_DEVNODES_CHANGED 7
@@ -101,6 +102,13 @@
 	DWORD dbcv_unitmask;
 	WORD dbcv_flags;
 } DEV_BROADCAST_VOLUME,*PDEV_BROADCAST_VOLUME;
+typedef struct _DEV_BROADCAST_DEVICEINTERFACE {
+    DWORD dbcc_size;
+    DWORD dbcc_devicetype;
+    DWORD dbcc_reserved;
+    GUID dbcc_classguid;
+    TCHAR dbcc_name[1];
+} DEV_BROADCAST_DEVICEINTERFACE, *PDEV_BROADCAST_DEVICEINTERFACE;
 
 #ifdef UNICODE
 typedef DEV_BROADCAST_PORT_W DEV_BROADCAST_PORT, *PDEV_BROADCAST_PORT;

Added: trunk/reactos/include/reactos/libs/audiosrv/audiosrv.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/include/reactos/libs/audio…
==============================================================================
--- trunk/reactos/include/reactos/libs/audiosrv/audiosrv.h (added)
+++ trunk/reactos/include/reactos/libs/audiosrv/audiosrv.h Wed Sep 19 08:13:24 2007
@@ -1,0 +1,60 @@
+/*
+ * PROJECT:          ReactOS
+ * LICENSE:          GPL - See COPYING in the top level directory
+ * FILE:             include/reactos/libs/audiosrv/audiosrv.h
+ * PURPOSE:          Audio Service Plug and Play list
+ * COPYRIGHT:        Copyright 2007 Andrew Greenwood
+ */
+
+#include <windows.h>
+
+#ifndef AUDIOSRV_H
+#define AUDIOSRV_H
+
+/* This is currently set to avoid conflicting service names in Windows! */
+#define SERVICE_NAME                L"RosAudioSrv"
+
+/* A named mutex is used for synchronizing access to the device list.
+   If this mutex doesn't exist, it means the audio service isn't running. */
+#define AUDIO_LIST_LOCK_NAME        L"Global\\AudioDeviceListLock"
+
+/* ...and this is where the device list will be available */
+#define AUDIO_LIST_NAME             L"Global\\AudioDeviceList"
+
+/* Amount of shared memory to allocate */
+#define AUDIO_LIST_MAX_SIZE         65536
+
+typedef struct
+{
+    DWORD enabled;
+    WCHAR path[];       /* The device object path (excluded from sizeof) */
+} PnP_AudioDevice;
+
+typedef struct
+{
+    DWORD size;         /* Size of the shared mem */
+    DWORD max_size;     /* Amount of mem available */
+    DWORD device_count; /* Number of devices */
+    PnP_AudioDevice first_device[];
+} PnP_AudioHeader;
+
+
+/* Calculate amount of memory consumed by a wide string - this includes the
+   terminating NULL. */
+
+#define WideStringSize(str) \
+    ( (lstrlenW(str) + 1) * sizeof(WCHAR) )
+
+BOOL
+InitializeAudioDeviceListLock();
+
+VOID
+KillAudioDeviceListLock();
+
+VOID
+LockAudioDeviceList();
+
+VOID
+UnlockAudioDeviceList();
+
+#endif