reactos/drivers/wdm/audio/backpln/portcls/port_factory.cpp

   1 /*
   2     ReactOS Operating System
   3     Port Class API / Port Factory
   4
   5     by Andrew Greenwood
   6 */
   7
   8 #define INITGUID
   9
  10 #include "private.h"
  11 #include <portcls.h>
  12 #include <ks.h>
  13 #include <kcom.h>
  14 #include "port.h"
  15
  16 /*
  17  * @unimplemented
  18  */
  19 PORTCLASSAPI NTSTATUS NTAPI
  20 PcNewPort(
  21     OUT PPORT* OutPort,
  22     IN  REFCLSID ClassId)
  23 {
  24     /*
  25         ClassId can be one of the following:
  26         CLSID_PortDMus -> IPortDMus (dmusicks.h)    -- TODO
  27         CLSID_PortMidi -> IPortMidi
  28         CLSID_PortTopology -> IPortTopology
  29         CLSID_PortWaveCyclic -> IPortWaveCyclic
  30         CLSID_PortWavePci -> IPortWavePci
  31
  32         TODO: What about PortWavePciStream?
  33     */
  34
  35     PPORT new_port = NULL;
  36     NTSTATUS status = STATUS_UNSUCCESSFUL;
  37
  38     if ( ! OutPort )
  39     {
  40         DPRINT("PcNewPort was supplied a NULL OutPort parameter\n");
  41         return STATUS_INVALID_PARAMETER;
  42     }
  43
  44     if ( ( IsEqualGUIDAligned(ClassId, &CLSID_PortMidi)         ) ||
  45          ( IsEqualGUIDAligned(ClassId, &CLSID_PortTopology)     ) ||
  46          ( IsEqualGUIDAligned(ClassId, &CLSID_PortWaveCyclic)   ) ||
  47          ( IsEqualGUIDAligned(ClassId, &CLSID_PortWavePci)      ) )
  48     {
  49         DPRINT("Calling KoCreateInstance\n");
  50         /* Call KS.SYS's Kernel-mode COM function */
  51         status = KoCreateInstance(ClassId, NULL, CLSCTX_KERNEL_SERVER, &IID_IPort, (PVOID*)&new_port);
  52     }
  53     else
  54     {
  55
  56         DPRINT("PcNewPort received a CLSID it does not deal with\n");
  57         status = STATUS_NOT_SUPPORTED;
  58     }
  59
  60     /* If an unsupported CLSID was handed to us, or the creation failed, we fail */
  61     if ( status != STATUS_SUCCESS )
  62     {
  63         return status;
  64     }
  65
  66     /* Fill the caller's PPORT* to point to the new port */
  67     *OutPort = new_port;
  68
  69     DPRINT("PcNewPort succeeded\n");
  70
  71     return STATUS_SUCCESS;
  72 }