[SDK] One step further towards ReactOS source code tree restructure: the sdk folder...

[reactos.git] / reactos / sdk / lib / drivers / sound / soundblaster / speaker.c

diff --git a/reactos/sdk/lib/drivers/sound/soundblaster/speaker.c b/reactos/sdk/lib/drivers/sound/soundblaster/speaker.c
new file mode 100644 (file)
index 0000000..a74a0b5
--- /dev/null
+++ b/reactos/sdk/lib/drivers/sound/soundblaster/speaker.c
@@ -0,0 +1,63 @@
+/*
+    ReactOS Sound System
+    Sound Blaster DSP support
+    Speaker commands
+
+    Author:
+        Andrew Greenwood (silverblade@reactos.org)
+
+    History:
+        2 July 2008 - Created (split from sbdsp.c)
+
+    Notes:
+        Functions documented in sbdsp.h
+*/
+
+#include "precomp.h"
+
+NTSTATUS
+SbDspEnableSpeaker(
+    IN  PUCHAR BasePort,
+    IN  ULONG Timeout)
+{
+    return SbDspWrite(BasePort, SB_DSP_SPEAKER_ON, Timeout);
+}
+
+NTSTATUS
+SbDspDisableSpeaker(
+    IN  PUCHAR BasePort,
+    IN  ULONG Timeout)
+{
+    return SbDspWrite(BasePort, SB_DSP_SPEAKER_OFF, Timeout);
+}
+
+/*
+    VirtualBox doesn't seem to support this.
+*/
+NTSTATUS
+SbDspIsSpeakerEnabled(
+    IN  PUCHAR BasePort,
+    OUT PBOOLEAN IsEnabled,
+    IN  ULONG Timeout)
+{
+    NTSTATUS Status;
+    UCHAR SpeakerStatus = 0;
+
+    if ( ! IsEnabled )
+        return STATUS_INVALID_PARAMETER_2;
+
+    /* Request the speaker status */
+    Status = SbDspWrite(BasePort, SB_DSP_SPEAKER_STATUS, Timeout);
+    if ( Status != STATUS_SUCCESS )
+        return Status;
+
+    /* Obtain the status */
+    Status = SbDspRead(BasePort, &SpeakerStatus, Timeout);
+    if ( Status != STATUS_SUCCESS )
+        return Status;
+
+    DbgPrint("SBDSP - SpeakerStatus is %02x\n", SpeakerStatus);
+    *IsEnabled = (SpeakerStatus == 0xFF);
+
+    return STATUS_SUCCESS;
+}