reactos/dll/win32/wdmaud.drv/wdmaud.c

   1 /*
   2  * PROJECT:     ReactOS Sound System
   3  * LICENSE:     GPL - See COPYING in the top level directory
   4  * FILE:        dll/win32/wdmaud.drv/wdmaud.c
   5  *
   6  * PURPOSE:     WDM Audio Driver (User-mode part)
   7  * PROGRAMMERS: Andrew Greenwood (silverblade@reactos.org)
   8  *
   9  * NOTES:       Looking for wodMessage & co? You won't find them here. Try
  10  *              the MME Buddy library, which is where these routines are
  11  *              actually implemented.
  12  *
  13  */
  14
  15 #include <windows.h>
  16 #include <ntddsnd.h>
  17 #include <sndtypes.h>
  18 #include <mmddk.h>
  19 #include <mmebuddy.h>
  20
  21 #define KERNEL_DEVICE_NAME      L"\\\\Device\\wdmaud"
  22
  23 HANDLE KernelHandle = INVALID_HANDLE_VALUE;
  24
  25 APIENTRY LONG
  26 DriverProc(
  27     DWORD DriverId,
  28     HANDLE DriverHandle,
  29     UINT Message,
  30     LONG Parameter1,
  31     LONG Parameter2)
  32 {
  33     MMRESULT Result;
  34
  35     switch ( Message )
  36     {
  37         case DRV_LOAD :
  38         {
  39             SND_TRACE(L"DRV_LOAD\n");
  40
  41             Result = InitEntrypointMutexes();
  42
  43             if ( ! MMSUCCESS(Result) )
  44                 return 0L;
  45
  46             KernelHandle = CreateFile(KERNEL_DEVICE_NAME,
  47                                       GENERIC_READ | GENERIC_WRITE,
  48                                       FILE_SHARE_WRITE, // ok?
  49                                       NULL,
  50                                       OPEN_EXISTING,
  51                                       FILE_FLAG_OVERLAPPED,
  52                                       NULL);
  53
  54             if ( KernelHandle == INVALID_HANDLE_VALUE )
  55             {
  56                 SND_ERR(L"Failed to open %s\n", KERNEL_DEVICE_NAME);
  57                 CleanupEntrypointMutexes();
  58
  59                 UnlistAllSoundDevices();
  60
  61                 return 0L;
  62             }
  63
  64             SND_TRACE(L"Initialisation complete\n");
  65
  66             return 1L;
  67         }
  68
  69         case DRV_FREE :
  70         {
  71             SND_TRACE(L"DRV_FREE\n");
  72
  73             if ( KernelHandle != INVALID_HANDLE_VALUE )
  74             {
  75                 CloseHandle(KernelHandle);
  76                 KernelHandle = INVALID_HANDLE_VALUE;
  77             }
  78
  79             /* TODO: Clean up the path names! */
  80             UnlistAllSoundDevices();
  81
  82             CleanupEntrypointMutexes();
  83
  84             SND_TRACE(L"Unfreed memory blocks: %d\n",
  85                       GetMemoryAllocationCount());
  86
  87             return 1L;
  88         }
  89
  90         case DRV_ENABLE :
  91         case DRV_DISABLE :
  92         {
  93             SND_TRACE(L"DRV_ENABLE / DRV_DISABLE\n");
  94             return 1L;
  95         }
  96
  97         case DRV_OPEN :
  98         case DRV_CLOSE :
  99         {
 100             SND_TRACE(L"DRV_OPEN / DRV_CLOSE\n");
 101             return 1L;
 102         }
 103
 104         case DRV_QUERYCONFIGURE :
 105         {
 106             SND_TRACE(L"DRV_QUERYCONFIGURE\n");
 107             return 0L;
 108         }
 109         case DRV_CONFIGURE :
 110             return DRVCNF_OK;
 111
 112         default :
 113             SND_TRACE(L"Unhandled message %d\n", Message);
 114             return DefDriverProc(DriverId,
 115                                  DriverHandle,
 116                                  Message,
 117                                  Parameter1,
 118                                  Parameter2);
 119     }
 120 }
 121
 122
 123 BOOL WINAPI DllMain(
 124     HINSTANCE hinstDLL,
 125     DWORD fdwReason,
 126     LPVOID lpvReserved)
 127 {
 128     switch ( fdwReason )
 129     {
 130         case DLL_PROCESS_ATTACH :
 131             SND_TRACE(L"WDMAUD.DRV - Process attached\n");
 132             break;
 133         case DLL_PROCESS_DETACH :
 134             SND_TRACE(L"WDMAUD.DRV - Process detached\n");
 135             break;
 136         case DLL_THREAD_ATTACH :
 137             SND_TRACE(L"WDMAUD.DRV - Thread attached\n");
 138             break;
 139         case DLL_THREAD_DETACH :
 140             SND_TRACE(L"WDMAUD.DRV - Thread detached\n");
 141             break;
 142     }
 143
 144     return TRUE;
 145 }