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hw.cpp
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hw.cpp
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/*++
Copyright (c) 1997-2000 Microsoft Corporation All Rights Reserved
Module Name:
hw.cpp
Abstract:
Implementation of MSVAD HW class.
MSVAD HW has an array for storing mixer and volume settings
for the topology.
--*/
#include "rtsdaudio.h"
#include "hw.h"
//=============================================================================
// CRTSDAudioHW
//=============================================================================
//=============================================================================
#pragma code_seg("PAGE")
CRTSDAudioHW::CRTSDAudioHW()
: m_ulMux(0)
/*++
Routine Description:
Constructor for MSVADHW.
Arguments:
Return Value:
void
--*/
{
PAGED_CODE();
MixerReset();
} // CRTSDAudioHW
#pragma code_seg()
//=============================================================================
BOOL
CRTSDAudioHW::GetMixerMute
(
IN ULONG ulNode
)
/*++
Routine Description:
Gets the HW (!) mute levels for MSVAD
Arguments:
ulNode - topology node id
Return Value:
mute setting
--*/
{
if (ulNode < MAX_TOPOLOGY_NODES)
{
return m_MuteControls[ulNode];
}
return 0;
} // GetMixerMute
//=============================================================================
ULONG
CRTSDAudioHW::GetMixerMux()
/*++
Routine Description:
Return the current mux selection
Arguments:
Return Value:
ULONG
--*/
{
return m_ulMux;
} // GetMixerMux
//=============================================================================
LONG
CRTSDAudioHW::GetMixerVolume
(
IN ULONG ulNode,
IN LONG lChannel
)
/*++
Routine Description:
Gets the HW (!) volume for MSVAD.
Arguments:
ulNode - topology node id
lChannel - which channel are we setting?
Return Value:
LONG - volume level
--*/
{
if (ulNode < MAX_TOPOLOGY_NODES)
{
return m_VolumeControls[ulNode];
}
return 0;
} // GetMixerVolume
//=============================================================================
#pragma code_seg("PAGE")
void
CRTSDAudioHW::MixerReset()
/*++
Routine Description:
Resets the mixer registers.
Arguments:
Return Value:
void
--*/
{
PAGED_CODE();
RtlFillMemory(m_VolumeControls, sizeof(LONG) * MAX_TOPOLOGY_NODES, 0xFF);
RtlFillMemory(m_MuteControls, sizeof(BOOL) * MAX_TOPOLOGY_NODES, TRUE);
// BUGBUG change this depending on the topology
m_ulMux = 2;
} // MixerReset
#pragma code_seg()
//=============================================================================
void
CRTSDAudioHW::SetMixerMute
(
IN ULONG ulNode,
IN BOOL fMute
)
/*++
Routine Description:
Sets the HW (!) mute levels for MSVAD
Arguments:
ulNode - topology node id
fMute - mute flag
Return Value:
void
--*/
{
if (ulNode < MAX_TOPOLOGY_NODES)
{
m_MuteControls[ulNode] = fMute;
}
} // SetMixerMute
//=============================================================================
void
CRTSDAudioHW::SetMixerMux
(
IN ULONG ulNode
)
/*++
Routine Description:
Sets the HW (!) mux selection
Arguments:
ulNode - topology node id
Return Value:
void
--*/
{
m_ulMux = ulNode;
} // SetMixMux
//=============================================================================
void
CRTSDAudioHW::SetMixerVolume
(
IN ULONG ulNode,
IN LONG lChannel,
IN LONG lVolume
)
/*++
Routine Description:
Sets the HW (!) volume for MSVAD.
Arguments:
ulNode - topology node id
lChannel - which channel are we setting?
lVolume - volume level
Return Value:
void
--*/
{
if (ulNode < MAX_TOPOLOGY_NODES)
{
m_VolumeControls[ulNode] = lVolume;
}
} // SetMixerVolume