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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//=============================================================================//
#ifdef OSX
#include <Carbon/Carbon.h>
#include <CoreAudio/CoreAudio.h>
#endif
#include "tier0/platform.h"
#include "ivoicerecord.h"
#include "voice_mixer_controls.h"
// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"
#ifndef OSX
class CMixerControls : public IMixerControls
{
public:
CMixerControls() {}
virtual ~CMixerControls() {}
virtual void Release() {}
virtual bool GetValue_Float(Control iControl, float &value ) {return false;}
virtual bool SetValue_Float(Control iControl, float value) {return false;}
virtual bool SelectMicrophoneForWaveInput() {return false;}
virtual const char *GetMixerName() {return "Linux"; }
private:
};
IMixerControls* g_pMixerControls = NULL;
void InitMixerControls()
{
if ( !g_pMixerControls )
{
g_pMixerControls = new CMixerControls;
}
}
void ShutdownMixerControls()
{
delete g_pMixerControls;
g_pMixerControls = NULL;
}
#elif defined(OSX)
class CMixerControls : public IMixerControls
{
public:
CMixerControls();
virtual ~CMixerControls();
virtual void Release();
virtual bool GetValue_Float(Control iControl, float &value);
virtual bool SetValue_Float(Control iControl, float value);
virtual bool SelectMicrophoneForWaveInput();
virtual const char *GetMixerName();
private:
AudioObjectID GetDefaultInputDevice();
char *m_szMixerName;
AudioObjectID m_theDefaultDeviceID;
};
CMixerControls::CMixerControls()
{
m_szMixerName = NULL;
m_theDefaultDeviceID = GetDefaultInputDevice();
OSStatus theStatus;
UInt32 outSize = sizeof(UInt32);
theStatus = AudioDeviceGetPropertyInfo( m_theDefaultDeviceID,
0,
TRUE,
kAudioDevicePropertyDeviceName,
&outSize,
NULL);
if ( theStatus == noErr )
{
m_szMixerName = (char *)malloc( outSize*sizeof(char));
theStatus = AudioDeviceGetProperty( m_theDefaultDeviceID,
0,
TRUE,
kAudioDevicePropertyDeviceName,
&outSize,
m_szMixerName);
if ( theStatus != noErr )
{
free( m_szMixerName );
m_szMixerName = NULL;
}
}
}
CMixerControls::~CMixerControls()
{
if ( m_szMixerName )
free( m_szMixerName );
}
void CMixerControls::Release()
{
}
bool CMixerControls::SelectMicrophoneForWaveInput()
{
return true; // not needed
}
const char *CMixerControls::GetMixerName()
{
return m_szMixerName;
}
bool CMixerControls::GetValue_Float(Control iControl, float &value)
{
switch( iControl)
{
case MicBoost:
{
value = 0.0f;
return true;
}
case MicVolume:
{
OSStatus theError = noErr;
for ( int iChannel = 0; iChannel < 3; iChannel++ )
{
// scan the channel list until you find a channel set to non-zero, then use that
Float32 theVolume = 0;
UInt32 theSize = sizeof(Float32);
AudioObjectPropertyAddress theAddress = { kAudioDevicePropertyVolumeScalar, kAudioDevicePropertyScopeInput, iChannel };
theError = AudioObjectGetPropertyData(m_theDefaultDeviceID,
&theAddress,
0,
NULL,
&theSize,
&theVolume);
value = theVolume;
if ( theError == noErr && theVolume != 0.0f )
break;
}
return theError == noErr;
}
case MicMute:
// Mic playback muting. You usually want this set to false, otherwise the sound card echoes whatever you say into the mic.
{
Float32 theMute = 0;
UInt32 theSize = sizeof(Float32);
AudioObjectPropertyAddress theAddress = { kAudioDevicePropertyMute, kAudioDevicePropertyScopeInput, 1 };
OSStatus theError = AudioObjectGetPropertyData(m_theDefaultDeviceID,
&theAddress,
0,
NULL,
&theSize,
&theMute);
value = theMute;
return theError == noErr;
}
default:
assert( !"Invalid Control type" );
value = 0.0f;
return false;
};
}
bool CMixerControls::SetValue_Float(Control iControl, float value)
{
switch( iControl)
{
case MicBoost:
{
return false;
}
case MicVolume:
{
if ( value <= 0.0 )
return false; // don't let the volume be set to zero
Float32 theVolume = value;
UInt32 size = sizeof(Float32);
Boolean canset = false;
AudioObjectID defaultInputDevice = m_theDefaultDeviceID;
size = sizeof(canset);
OSStatus err = AudioDeviceGetPropertyInfo( defaultInputDevice, 0, true, kAudioDevicePropertyVolumeScalar, &size, &canset);
if(err==noErr && canset==true)
{
size = sizeof(theVolume);
err = AudioDeviceSetProperty( defaultInputDevice, NULL, 0, true, kAudioDevicePropertyVolumeScalar, size, &theVolume);
return err==noErr;
}
// try seperate channels
// get channels
UInt32 channels[2];
size = sizeof(channels);
err = AudioDeviceGetProperty(defaultInputDevice, 0, true, kAudioDevicePropertyPreferredChannelsForStereo, &size,&channels);
if(err!=noErr)
return false;
// set volume
size = sizeof(float);
err = AudioDeviceSetProperty(defaultInputDevice, 0, channels[0], true, kAudioDevicePropertyVolumeScalar, size, &theVolume);
//AssertMsg1( noErr==err, "error setting volume of channel %d\n",(int)channels[0]);
err = AudioDeviceSetProperty(defaultInputDevice, 0, channels[1], true, kAudioDevicePropertyVolumeScalar, size, &theVolume);
//AssertMsg1( noErr==err, "error setting volume of channel %d\n",(int)channels[1]);
return err == noErr;
}
case MicMute:
// Mic playback muting. You usually want this set to false, otherwise the sound card echoes whatever you say into the mic.
{
Float32 theMute = value;
UInt32 theMuteSize = sizeof(Float32);
OSStatus theError = paramErr;
theError = AudioDeviceSetProperty( m_theDefaultDeviceID,
NULL,
0,
TRUE,
kAudioDevicePropertyMute,
theMuteSize,
&theMute);
return theError == noErr;
}
default:
assert( !"Invalid Control type" );
return false;
};
}
AudioObjectID CMixerControls::GetDefaultInputDevice()
{
AudioObjectID theDefaultDeviceID = kAudioObjectUnknown;
AudioObjectPropertyAddress theDefaultDeviceAddress = { kAudioHardwarePropertyDefaultInputDevice, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster };
UInt32 theDefaultDeviceSize = sizeof(AudioObjectID);
OSStatus theError = AudioObjectGetPropertyData (kAudioObjectSystemObject, &theDefaultDeviceAddress, 0, NULL, &theDefaultDeviceSize, &theDefaultDeviceID);
return theDefaultDeviceID;
}
IMixerControls* g_pMixerControls = NULL;
void InitMixerControls()
{
if ( !g_pMixerControls )
{
g_pMixerControls = new CMixerControls;
}
}
void ShutdownMixerControls()
{
delete g_pMixerControls;
g_pMixerControls = NULL;
}
#else
#error
#endif
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