drivers/wdm/audio/sysaudio/dispatcher.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS Kernel Streaming
   4  * FILE:            drivers/wdm/audio/sysaudio/dispatcher.c
   5  * PURPOSE:         System Audio graph builder
   6  * PROGRAMMER:      Johannes Anderwald
   7  */
   8
   9 #include "sysaudio.h"
  10
  11 NTSTATUS
  12 NTAPI
  13 Dispatch_fnDeviceIoControl(
  14     PDEVICE_OBJECT DeviceObject,
  15     PIRP Irp)
  16 {
  17     PIO_STACK_LOCATION IoStack;
  18
  19     IoStack = IoGetCurrentIrpStackLocation(Irp);
  20     if (IoStack->Parameters.DeviceIoControl.IoControlCode == IOCTL_KS_PROPERTY)
  21     {
  22        return SysAudioHandleProperty(DeviceObject, Irp);
  23     }
  24
  25     /* unsupported request */
  26     Irp->IoStatus.Status = STATUS_UNSUCCESSFUL;
  27     Irp->IoStatus.Information = 0;
  28     IoCompleteRequest(Irp, IO_NO_INCREMENT);
  29     return STATUS_UNSUCCESSFUL;
  30 }
  31
  32 NTSTATUS
  33 NTAPI
  34 Dispatch_fnClose(
  35     PDEVICE_OBJECT DeviceObject,
  36     PIRP Irp)
  37 {
  38     DPRINT("Dispatch_fnClose called DeviceObject %p Irp %p\n", DeviceObject);
  39
  40     Irp->IoStatus.Status = STATUS_SUCCESS;
  41     Irp->IoStatus.Information = 0;
  42     IoCompleteRequest(Irp, IO_NO_INCREMENT);
  43     return STATUS_SUCCESS;
  44 }
  45
  46 static KSDISPATCH_TABLE DispatchTable =
  47 {
  48     Dispatch_fnDeviceIoControl,
  49     KsDispatchInvalidDeviceRequest,
  50     KsDispatchInvalidDeviceRequest,
  51     KsDispatchInvalidDeviceRequest,
  52     Dispatch_fnClose,
  53     KsDispatchInvalidDeviceRequest,
  54     KsDispatchInvalidDeviceRequest,
  55     KsDispatchFastIoDeviceControlFailure,
  56     KsDispatchFastReadFailure,
  57     KsDispatchFastWriteFailure,
  58 };
  59
  60 NTSTATUS
  61 NTAPI
  62 DispatchCreateSysAudio(
  63     IN  PDEVICE_OBJECT DeviceObject,
  64     IN  PIRP Irp)
  65 {
  66     NTSTATUS Status;
  67     KSOBJECT_HEADER ObjectHeader;
  68     PKSOBJECT_CREATE_ITEM CreateItem;
  69
  70     DPRINT("DispatchCreateSysAudio entered\n");
  71
  72     /* allocate create item */
  73     CreateItem = AllocateItem(NonPagedPool, sizeof(KSOBJECT_CREATE_ITEM));
  74     if (!CreateItem)
  75     {
  76         Irp->IoStatus.Information = 0;
  77         Irp->IoStatus.Status = STATUS_INSUFFICIENT_RESOURCES;
  78         IoCompleteRequest(Irp, IO_NO_INCREMENT);
  79         return STATUS_INSUFFICIENT_RESOURCES;
  80     }
  81
  82     /* zero create struct */
  83     RtlZeroMemory(CreateItem, sizeof(KSOBJECT_CREATE_ITEM));
  84
  85     /* setup create context */
  86     CreateItem->Create = DispatchCreateSysAudioPin;
  87     RtlInitUnicodeString(&CreateItem->ObjectClass, KSSTRING_Pin);
  88
  89     /* allocate object header */
  90     Status = KsAllocateObjectHeader(&ObjectHeader, 1, CreateItem, Irp, &DispatchTable);
  91
  92     DPRINT("KsAllocateObjectHeader result %x\n", Status);
  93     /* complete the irp */
  94     Irp->IoStatus.Information = 0;
  95     Irp->IoStatus.Status = Status;
  96     IoCompleteRequest(Irp, IO_NO_INCREMENT);
  97     return Status;
  98 }
  99
 100 NTSTATUS
 101 SysAudioAllocateDeviceHeader(
 102     IN SYSAUDIODEVEXT *DeviceExtension)
 103 {
 104     NTSTATUS Status;
 105     PKSOBJECT_CREATE_ITEM CreateItem;
 106
 107     /* allocate create item */
 108     CreateItem = AllocateItem(NonPagedPool, sizeof(KSOBJECT_CREATE_ITEM));
 109     if (!CreateItem)
 110         return STATUS_INSUFFICIENT_RESOURCES;
 111
 112     /* initialize create item struct */
 113     RtlZeroMemory(CreateItem, sizeof(KSOBJECT_CREATE_ITEM));
 114     CreateItem->Create = DispatchCreateSysAudio;
 115
 116     /* FIXME Sysaudio doesnt need a named create item because it installs itself
 117      * via the device interface
 118      */
 119     RtlInitUnicodeString(&CreateItem->ObjectClass, L"GLOBAL");
 120     CreateItem->Flags = KSCREATE_ITEM_WILDCARD;
 121
 122     Status = KsAllocateDeviceHeader(&DeviceExtension->KsDeviceHeader,
 123                                     1,
 124                                     CreateItem);
 125     return Status;
 126 }
 127
 128 NTSTATUS
 129 SysAudioOpenKMixer(
 130     IN SYSAUDIODEVEXT *DeviceExtension)
 131 {
 132     NTSTATUS Status;
 133     UNICODE_STRING DeviceInstanceName = RTL_CONSTANT_STRING(L"\\Device\\kmixer\\GLOBAL");
 134     UNICODE_STRING DevicePath = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\kmixer");
 135
 136     Status = ZwLoadDriver(&DevicePath);
 137
 138     if (NT_SUCCESS(Status))
 139     {
 140         Status = OpenDevice(&DeviceInstanceName, &DeviceExtension->KMixerHandle, &DeviceExtension->KMixerFileObject);
 141         if (!NT_SUCCESS(Status))
 142         {
 143             DeviceExtension->KMixerHandle = NULL;
 144             DeviceExtension->KMixerFileObject = NULL;
 145         }
 146     }
 147
 148     DPRINT("Status %lx KMixerHandle %p KMixerFileObject %p\n", Status, DeviceExtension->KMixerHandle, DeviceExtension->KMixerFileObject);
 149     return STATUS_SUCCESS;
 150 }