Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//=============================================================================//
#include "audio_pch.h"
#include "voice_mixer_controls.h"
// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"
// NOTE: Vista deprecated these APIs
// Under vista these settings are per-session (not persistent)
// The correct method is to use the AudioEndpoint COM objects to manage controls like this
// The interface is not 1:1 so for now we'll just back the state with convars and reapply it
// on init of the mixer controls. In the future when XP is no longer the majority of our user base
// we should revisit this and move to the new API.
// http://msdn.microsoft.com/en-us/library/aa964574(VS.85).aspx
class CMixerControls : public IMixerControls
{
public:
CMixerControls();
virtual ~CMixerControls();
virtual bool GetValue_Float(Control iControl, float &value);
virtual bool SetValue_Float(Control iControl, float value);
virtual bool SelectMicrophoneForWaveInput();
private:
bool Init();
void Term();
void Clear();
bool GetControlOption_Bool(DWORD dwControlID, DWORD cMultipleItems, bool &bValue);
bool SetControlOption_Bool(DWORD dwControlID, DWORD cMultipleItems, const bool bValue);
bool GetControlOption_Unsigned(DWORD dwControlID, DWORD cMultipleItems, DWORD &value);
bool SetControlOption_Unsigned(DWORD dwControlID, DWORD cMultipleItems, const DWORD value);
bool GetLineControls( DWORD dwLineID, MIXERCONTROL *controls, DWORD nControls );
void FindMicSelectControl( DWORD dwLineID, DWORD nControls );
private:
HMIXER m_hMixer;
class ControlInfo
{
public:
DWORD m_dwControlID;
DWORD m_cMultipleItems;
bool m_bFound;
};
DWORD m_dwMicSelectControlID;
DWORD m_dwMicSelectMultipleItems;
DWORD m_dwMicSelectControlType;
DWORD m_dwMicSelectIndex;
// Info about the controls we found.
ControlInfo m_ControlInfos[NumControls];
};
CMixerControls::CMixerControls()
{
m_dwMicSelectControlID = 0xFFFFFFFF;
Clear();
Init();
}
CMixerControls::~CMixerControls()
{
Term();
}
bool CMixerControls::Init()
{
Term();
MMRESULT mmr;
bool bFoundMixer = false;
bool bFoundConnectionWithMicVolume = false;
CUtlVectorFixedGrowable<MIXERCONTROL, 64> controls;
// Iterate over all the devices
// This is done in reverse so the 0th device is our fallback if none of them had the correct MicVolume control
for ( int iDevice = static_cast<int>( mixerGetNumDevs() ) - 1; iDevice >= 0 && !bFoundConnectionWithMicVolume; --iDevice )
{
// Open the mixer.
mmr = mixerOpen(&m_hMixer, (DWORD)iDevice, 0, 0, 0 );
if(mmr != MMSYSERR_NOERROR)
{
continue;
}
// Iterate over each destination line, looking for Play Controls.
MIXERCAPS mxcaps;
mmr = mixerGetDevCaps((UINT)m_hMixer, &mxcaps, sizeof(mxcaps));
if(mmr != MMSYSERR_NOERROR)
{
continue;
}
bFoundMixer = true;
for(UINT u = 0; u < mxcaps.cDestinations; u++)
{
MIXERLINE recordLine;
recordLine.cbStruct = sizeof(recordLine);
recordLine.dwDestination = u;
mmr = mixerGetLineInfo((HMIXEROBJ)m_hMixer, &recordLine, MIXER_GETLINEINFOF_DESTINATION);
if(mmr != MMSYSERR_NOERROR)
continue;
// Go through the controls that aren't attached to a specific src connection.
// We're looking for the checkbox that enables the user's microphone for waveIn.
if( recordLine.dwComponentType == MIXERLINE_COMPONENTTYPE_DST_WAVEIN )
{
FindMicSelectControl( recordLine.dwLineID, recordLine.cControls );
}
// Now iterate over each connection (things like wave out, microphone, speaker, CD audio), looking for Microphone.
UINT cConnections = (UINT)recordLine.cConnections;
for (UINT v = 0; v < cConnections; v++)
{
MIXERLINE micLine;
micLine.cbStruct = sizeof(micLine);
micLine.dwDestination = u;
micLine.dwSource = v;
mmr = mixerGetLineInfo((HMIXEROBJ)m_hMixer, &micLine, MIXER_GETLINEINFOF_SOURCE);
if(mmr != MMSYSERR_NOERROR)
continue;
// Now look at all the controls (volume, mute, boost, etc).
controls.RemoveAll();
controls.SetCount(micLine.cControls);
if( !GetLineControls( micLine.dwLineID, controls.Base(), micLine.cControls ) )
continue;
for(UINT i=0; i < micLine.cControls; i++)
{
MIXERCONTROL *pControl = &controls[i];
if(micLine.dwComponentType == MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE)
{
if( pControl->dwControlType == MIXERCONTROL_CONTROLTYPE_ONOFF &&
(
strstr(pControl->szShortName, "Gain") ||
strstr(pControl->szShortName, "Boos") ||
strstr(pControl->szShortName, "+20d")
)
)
{
// This is the (record) boost option.
m_ControlInfos[MicBoost].m_bFound = true;
m_ControlInfos[MicBoost].m_dwControlID = pControl->dwControlID;
m_ControlInfos[MicBoost].m_cMultipleItems = pControl->cMultipleItems;
}
if(recordLine.dwComponentType == MIXERLINE_COMPONENTTYPE_DST_SPEAKERS &&
pControl->dwControlType == MIXERCONTROL_CONTROLTYPE_MUTE)
{
// This is the mute button.
m_ControlInfos[MicMute].m_bFound = true;
m_ControlInfos[MicMute].m_dwControlID = pControl->dwControlID;
m_ControlInfos[MicMute].m_cMultipleItems = pControl->cMultipleItems;
}
if(recordLine.dwComponentType == MIXERLINE_COMPONENTTYPE_DST_WAVEIN &&
pControl->dwControlType == MIXERCONTROL_CONTROLTYPE_VOLUME)
{
// This is the mic input level.
m_ControlInfos[MicVolume].m_bFound = true;
m_ControlInfos[MicVolume].m_dwControlID = pControl->dwControlID;
m_ControlInfos[MicVolume].m_cMultipleItems = pControl->cMultipleItems;
// We found a good recording device and can stop looking throught the available devices
bFoundConnectionWithMicVolume = true;
}
}
}
}
}
}
if ( !bFoundMixer )
{
// Failed to find any mixer (MixVolume or not)
Term();
return false;
}
return true;
}
void CMixerControls::Term()
{
if(m_hMixer)
{
mixerClose(m_hMixer);
m_hMixer = 0;
}
Clear();
}
bool CMixerControls::GetValue_Float( Control iControl, float &flValue )
{
if( iControl < 0 || iControl >= NumControls || !m_ControlInfos[iControl].m_bFound )
return false;
if(iControl == MicBoost || iControl == MicMute)
{
bool bValue = false;
bool ret = GetControlOption_Bool(m_ControlInfos[iControl].m_dwControlID, m_ControlInfos[iControl].m_cMultipleItems, bValue);
flValue = (float)bValue;
return ret;
}
else if(iControl == MicVolume)
{
DWORD dwValue = (DWORD)0;
if(GetControlOption_Unsigned(m_ControlInfos[iControl].m_dwControlID, m_ControlInfos[iControl].m_cMultipleItems, dwValue))
{
flValue = dwValue / 65535.0f;
return true;
}
}
return false;
}
bool CMixerControls::SetValue_Float(Control iControl, float flValue )
{
if(iControl < 0 || iControl >= NumControls || !m_ControlInfos[iControl].m_bFound)
return false;
if(iControl == MicBoost || iControl == MicMute)
{
bool bValue = !!flValue;
return SetControlOption_Bool(m_ControlInfos[iControl].m_dwControlID, m_ControlInfos[iControl].m_cMultipleItems, bValue);
}
else if(iControl == MicVolume)
{
DWORD dwValue = (DWORD)(flValue * 65535.0f);
return SetControlOption_Unsigned(m_ControlInfos[iControl].m_dwControlID, m_ControlInfos[iControl].m_cMultipleItems, dwValue);
}
return false;
}
bool CMixerControls::SelectMicrophoneForWaveInput()
{
if( m_dwMicSelectControlID == 0xFFFFFFFF )
return false;
MIXERCONTROLDETAILS_BOOLEAN *pmxcdSelectValue =
(MIXERCONTROLDETAILS_BOOLEAN*)_alloca( sizeof(MIXERCONTROLDETAILS_BOOLEAN) * m_dwMicSelectMultipleItems );
MIXERCONTROLDETAILS mxcd;
mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
mxcd.dwControlID = m_dwMicSelectControlID;
mxcd.cChannels = 1;
mxcd.cMultipleItems = m_dwMicSelectMultipleItems;
mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
mxcd.paDetails = pmxcdSelectValue;
if (mixerGetControlDetails(reinterpret_cast<HMIXEROBJ>(m_hMixer),
&mxcd,
MIXER_OBJECTF_HMIXER |
MIXER_GETCONTROLDETAILSF_VALUE)
== MMSYSERR_NOERROR)
{
// MUX restricts the line selection to one source line at a time.
if( m_dwMicSelectControlType == MIXERCONTROL_CONTROLTYPE_MUX )
{
ZeroMemory(pmxcdSelectValue,
m_dwMicSelectMultipleItems * sizeof(MIXERCONTROLDETAILS_BOOLEAN));
}
// set the Microphone value
pmxcdSelectValue[m_dwMicSelectIndex].fValue = 1;
mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
mxcd.dwControlID = m_dwMicSelectControlID;
mxcd.cChannels = 1;
mxcd.cMultipleItems = m_dwMicSelectMultipleItems;
mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
mxcd.paDetails = pmxcdSelectValue;
if (mixerSetControlDetails(reinterpret_cast<HMIXEROBJ>(m_hMixer),
&mxcd,
MIXER_OBJECTF_HMIXER |
MIXER_SETCONTROLDETAILSF_VALUE) == MMSYSERR_NOERROR)
{
return true;
}
}
return false;
}
void CMixerControls::Clear()
{
m_hMixer = 0;
memset(m_ControlInfos, 0, sizeof(m_ControlInfos));
}
bool CMixerControls::GetControlOption_Bool(DWORD dwControlID, DWORD cMultipleItems, bool &bValue)
{
MIXERCONTROLDETAILS details;
MIXERCONTROLDETAILS_BOOLEAN controlValue;
details.cbStruct = sizeof(details);
details.dwControlID = dwControlID;
details.cChannels = 1; // uniform..
details.cMultipleItems = cMultipleItems;
details.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
details.paDetails = &controlValue;
MMRESULT mmr = mixerGetControlDetails((HMIXEROBJ)m_hMixer, &details, 0L);
if(mmr == MMSYSERR_NOERROR)
{
bValue = !!controlValue.fValue;
return true;
}
else
{
return false;
}
}
bool CMixerControls::SetControlOption_Bool(DWORD dwControlID, DWORD cMultipleItems, const bool bValue)
{
MIXERCONTROLDETAILS details;
MIXERCONTROLDETAILS_BOOLEAN controlValue;
details.cbStruct = sizeof(details);
details.dwControlID = dwControlID;
details.cChannels = 1; // uniform..
details.cMultipleItems = cMultipleItems;
details.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
details.paDetails = &controlValue;
controlValue.fValue = bValue;
MMRESULT mmr = mixerSetControlDetails((HMIXEROBJ)m_hMixer, &details, 0L);
return mmr == MMSYSERR_NOERROR;
}
bool CMixerControls::GetControlOption_Unsigned(DWORD dwControlID, DWORD cMultipleItems, DWORD &value)
{
MIXERCONTROLDETAILS details;
MIXERCONTROLDETAILS_UNSIGNED controlValue;
details.cbStruct = sizeof(details);
details.dwControlID = dwControlID;
details.cChannels = 1; // uniform..
details.cMultipleItems = cMultipleItems;
details.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
details.paDetails = &controlValue;
MMRESULT mmr = mixerGetControlDetails((HMIXEROBJ)m_hMixer, &details, 0L);
if(mmr == MMSYSERR_NOERROR)
{
value = controlValue.dwValue;
return true;
}
else
{
return false;
}
}
bool CMixerControls::SetControlOption_Unsigned(DWORD dwControlID, DWORD cMultipleItems, const DWORD value)
{
MIXERCONTROLDETAILS details;
MIXERCONTROLDETAILS_UNSIGNED controlValue;
details.cbStruct = sizeof(details);
details.dwControlID = dwControlID;
details.cChannels = 1; // uniform..
details.cMultipleItems = cMultipleItems;
details.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
details.paDetails = &controlValue;
controlValue.dwValue = value;
MMRESULT mmr = mixerSetControlDetails((HMIXEROBJ)m_hMixer, &details, 0L);
return mmr == MMSYSERR_NOERROR;
}
bool CMixerControls::GetLineControls( DWORD dwLineID, MIXERCONTROL *controls, DWORD nControls )
{
MIXERLINECONTROLS mxlc;
mxlc.cbStruct = sizeof(mxlc);
mxlc.dwLineID = dwLineID;
mxlc.cControls = nControls;
mxlc.cbmxctrl = sizeof(MIXERCONTROL);
mxlc.pamxctrl = controls;
MMRESULT mmr = mixerGetLineControls((HMIXEROBJ)m_hMixer, &mxlc, MIXER_GETLINECONTROLSF_ALL);
return mmr == MMSYSERR_NOERROR;
}
void CMixerControls::FindMicSelectControl( DWORD dwLineID, DWORD nControls )
{
m_dwMicSelectControlID = 0xFFFFFFFF;
MIXERCONTROL *recControls = (MIXERCONTROL*)_alloca( sizeof(MIXERCONTROL) * nControls );
if( !GetLineControls( dwLineID, recControls, nControls ) )
return;
for( UINT iRecControl=0; iRecControl < nControls; iRecControl++ )
{
if( recControls[iRecControl].dwControlType == MIXERCONTROL_CONTROLTYPE_MIXER ||
recControls[iRecControl].dwControlType == MIXERCONTROL_CONTROLTYPE_MUX )
{
m_dwMicSelectControlID = recControls[iRecControl].dwControlID;
m_dwMicSelectControlType = recControls[iRecControl].dwControlType;
m_dwMicSelectMultipleItems = recControls[iRecControl].cMultipleItems;
m_dwMicSelectIndex = iRecControl;
// Get the index of the one that selects the mic.
MIXERCONTROLDETAILS_LISTTEXT *pmxcdSelectText =
(MIXERCONTROLDETAILS_LISTTEXT*)_alloca( sizeof(MIXERCONTROLDETAILS_LISTTEXT) * m_dwMicSelectMultipleItems );
MIXERCONTROLDETAILS mxcd;
mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
mxcd.dwControlID = m_dwMicSelectControlID;
mxcd.cChannels = 1;
mxcd.cMultipleItems = m_dwMicSelectMultipleItems;
mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_LISTTEXT);
mxcd.paDetails = pmxcdSelectText;
if (mixerGetControlDetails((HMIXEROBJ)m_hMixer,
&mxcd,
MIXER_OBJECTF_HMIXER |
MIXER_GETCONTROLDETAILSF_LISTTEXT) == MMSYSERR_NOERROR)
{
// determine which controls the Microphone source line
for (DWORD dwi = 0; dwi < m_dwMicSelectMultipleItems; dwi++)
{
// get the line information
MIXERLINE mxl;
mxl.cbStruct = sizeof(MIXERLINE);
mxl.dwLineID = pmxcdSelectText[dwi].dwParam1;
if (mixerGetLineInfo((HMIXEROBJ)m_hMixer,
&mxl,
MIXER_OBJECTF_HMIXER |
MIXER_GETLINEINFOF_LINEID) == MMSYSERR_NOERROR &&
mxl.dwComponentType == MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE)
{
// found, dwi is the index.
m_dwMicSelectIndex = dwi;
break;
}
}
}
break;
}
}
}
IMixerControls* g_pMixerControls = NULL;
void InitMixerControls()
{
if ( !g_pMixerControls )
{
g_pMixerControls = new CMixerControls;
}
}
void ShutdownMixerControls()
{
delete g_pMixerControls;
g_pMixerControls = NULL;
}