lib/drivers/sound/soundblaster/speaker.c

   1 /*
   2     ReactOS Sound System
   3     Sound Blaster DSP support
   4     Speaker commands
   5
   6     Author:
   7         Andrew Greenwood (silverblade@reactos.org)
   8
   9     History:
  10         2 July 2008 - Created (split from sbdsp.c)
  11
  12     Notes:
  13         Functions documented in sbdsp.h
  14 */
  15
  16 #include <ntddk.h>
  17 #include <debug.h>
  18
  19 #include <sbdsp.h>
  20
  21 NTSTATUS
  22 SbDspEnableSpeaker(
  23     IN  PUCHAR BasePort,
  24     IN  ULONG Timeout)
  25 {
  26     return SbDspWrite(BasePort, SB_DSP_SPEAKER_ON, Timeout);
  27 }
  28
  29 NTSTATUS
  30 SbDspDisableSpeaker(
  31     IN  PUCHAR BasePort,
  32     IN  ULONG Timeout)
  33 {
  34     return SbDspWrite(BasePort, SB_DSP_SPEAKER_OFF, Timeout);
  35 }
  36
  37 /*
  38     VirtualBox doesn't seem to support this.
  39 */
  40 NTSTATUS
  41 SbDspIsSpeakerEnabled(
  42     IN  PUCHAR BasePort,
  43     OUT PBOOLEAN IsEnabled,
  44     IN  ULONG Timeout)
  45 {
  46     NTSTATUS Status;
  47     UCHAR SpeakerStatus = 0;
  48
  49     if ( ! IsEnabled )
  50         return STATUS_INVALID_PARAMETER_2;
  51
  52     /* Request the speaker status */
  53     Status = SbDspWrite(BasePort, SB_DSP_SPEAKER_STATUS, Timeout);
  54     if ( Status != STATUS_SUCCESS )
  55         return Status;
  56
  57     /* Obtain the status */
  58     Status = SbDspRead(BasePort, &SpeakerStatus, Timeout);
  59     if ( Status != STATUS_SUCCESS )
  60         return Status;
  61
  62     DbgPrint("SBDSP - SpeakerStatus is %02x\n", SpeakerStatus);
  63     *IsEnabled = (SpeakerStatus == 0xFF);
  64
  65     return STATUS_SUCCESS;
  66 }