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 #define NDEBUG
  12 #include <debug.h>
  13
  14 NTSTATUS
  15 NTAPI
  16 Dispatch_fnDeviceIoControl(
  17     PDEVICE_OBJECT DeviceObject,
  18     PIRP Irp)
  19 {
  20     PIO_STACK_LOCATION IoStack;
  21
  22     IoStack = IoGetCurrentIrpStackLocation(Irp);
  23     if (IoStack->Parameters.DeviceIoControl.IoControlCode == IOCTL_KS_PROPERTY)
  24     {
  25        return SysAudioHandleProperty(DeviceObject, Irp);
  26     }
  27
  28     /* unsupported request */
  29     Irp->IoStatus.Status = STATUS_UNSUCCESSFUL;
  30     Irp->IoStatus.Information = 0;
  31     IoCompleteRequest(Irp, IO_NO_INCREMENT);
  32     return STATUS_UNSUCCESSFUL;
  33 }
  34
  35 NTSTATUS
  36 NTAPI
  37 Dispatch_fnClose(
  38     PDEVICE_OBJECT DeviceObject,
  39     PIRP Irp)
  40 {
  41     DPRINT("Dispatch_fnClose called DeviceObject %p Irp %p\n", DeviceObject);
  42
  43     Irp->IoStatus.Status = STATUS_SUCCESS;
  44     Irp->IoStatus.Information = 0;
  45     IoCompleteRequest(Irp, IO_NO_INCREMENT);
  46     return STATUS_SUCCESS;
  47 }
  48
  49 static KSDISPATCH_TABLE DispatchTable =
  50 {
  51     Dispatch_fnDeviceIoControl,
  52     KsDispatchInvalidDeviceRequest,
  53     KsDispatchInvalidDeviceRequest,
  54     KsDispatchInvalidDeviceRequest,
  55     Dispatch_fnClose,
  56     KsDispatchInvalidDeviceRequest,
  57     KsDispatchInvalidDeviceRequest,
  58     KsDispatchFastIoDeviceControlFailure,
  59     KsDispatchFastReadFailure,
  60     KsDispatchFastWriteFailure,
  61 };
  62
  63 NTSTATUS
  64 NTAPI
  65 DispatchCreateSysAudio(
  66     IN  PDEVICE_OBJECT DeviceObject,
  67     IN  PIRP Irp)
  68 {
  69     NTSTATUS Status;
  70     KSOBJECT_HEADER ObjectHeader;
  71     PKSOBJECT_CREATE_ITEM CreateItem;
  72
  73     DPRINT("DispatchCreateSysAudio entered\n");
  74
  75     /* allocate create item */
  76     CreateItem = AllocateItem(NonPagedPool, sizeof(KSOBJECT_CREATE_ITEM));
  77     if (!CreateItem)
  78     {
  79         Irp->IoStatus.Information = 0;
  80         Irp->IoStatus.Status = STATUS_INSUFFICIENT_RESOURCES;
  81         IoCompleteRequest(Irp, IO_NO_INCREMENT);
  82         return STATUS_INSUFFICIENT_RESOURCES;
  83     }
  84
  85     /* zero create struct */
  86     RtlZeroMemory(CreateItem, sizeof(KSOBJECT_CREATE_ITEM));
  87
  88     /* setup create context */
  89     CreateItem->Create = DispatchCreateSysAudioPin;
  90     RtlInitUnicodeString(&CreateItem->ObjectClass, KSSTRING_Pin);
  91
  92     /* allocate object header */
  93     Status = KsAllocateObjectHeader(&ObjectHeader, 1, CreateItem, Irp, &DispatchTable);
  94
  95     DPRINT("KsAllocateObjectHeader result %x\n", Status);
  96     /* complete the irp */
  97     Irp->IoStatus.Information = 0;
  98     Irp->IoStatus.Status = Status;
  99     IoCompleteRequest(Irp, IO_NO_INCREMENT);
 100     return Status;
 101 }
 102
 103 NTSTATUS
 104 SysAudioAllocateDeviceHeader(
 105     IN SYSAUDIODEVEXT *DeviceExtension)
 106 {
 107     NTSTATUS Status;
 108     PKSOBJECT_CREATE_ITEM CreateItem;
 109
 110     /* allocate create item */
 111     CreateItem = AllocateItem(NonPagedPool, sizeof(KSOBJECT_CREATE_ITEM));
 112     if (!CreateItem)
 113         return STATUS_INSUFFICIENT_RESOURCES;
 114
 115     /* initialize create item struct */
 116     RtlZeroMemory(CreateItem, sizeof(KSOBJECT_CREATE_ITEM));
 117     CreateItem->Create = DispatchCreateSysAudio;
 118
 119     /* FIXME Sysaudio doesnt need a named create item because it installs itself
 120      * via the device interface
 121      */
 122     RtlInitUnicodeString(&CreateItem->ObjectClass, L"GLOBAL");
 123     CreateItem->Flags = KSCREATE_ITEM_WILDCARD;
 124
 125     Status = KsAllocateDeviceHeader(&DeviceExtension->KsDeviceHeader,
 126                                     1,
 127                                     CreateItem);
 128     return Status;
 129 }
 130
 131 NTSTATUS
 132 SysAudioOpenKMixer(
 133     IN SYSAUDIODEVEXT *DeviceExtension)
 134 {
 135     NTSTATUS Status;
 136     UNICODE_STRING DeviceInstanceName = RTL_CONSTANT_STRING(L"\\Device\\kmixer\\GLOBAL");
 137     UNICODE_STRING DevicePath = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\kmixer");
 138
 139     Status = ZwLoadDriver(&DevicePath);
 140
 141     if (NT_SUCCESS(Status))
 142     {
 143         Status = OpenDevice(&DeviceInstanceName, &DeviceExtension->KMixerHandle, &DeviceExtension->KMixerFileObject);
 144         if (!NT_SUCCESS(Status))
 145         {
 146             DeviceExtension->KMixerHandle = NULL;
 147             DeviceExtension->KMixerFileObject = NULL;
 148         }
 149     }
 150
 151     DPRINT("Status %lx KMixerHandle %p KMixerFileObject %p\n", Status, DeviceExtension->KMixerHandle, DeviceExtension->KMixerFileObject);
 152     return STATUS_SUCCESS;
 153 }