path: root/libs/appleutility/CoreAudio/PublicUtility/CAHALAudioDevice.cpp

/*
     File: CAHALAudioDevice.cpp
 Abstract: CAHALAudioDevice.h
  Version: 1.1

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*/
//==================================================================================================
//	Includes
//==================================================================================================

//	Self Include
#include "CAHALAudioDevice.h"

//	PublicUtility Includes
#include "CAAutoDisposer.h"
#include "CAHALAudioStream.h"
#include "CAHALAudioSystemObject.h"
#include "CAPropertyAddress.h"

//==================================================================================================
//	CAHALAudioDevice
//==================================================================================================

CAHALAudioDevice::CAHALAudioDevice(AudioObjectID inAudioDevice)
:
	CAHALAudioObject(inAudioDevice)
{
}

CAHALAudioDevice::CAHALAudioDevice(CFStringRef inUID)
:
	CAHALAudioObject(CAHALAudioSystemObject().GetAudioDeviceForUID(inUID))
{
}

CAHALAudioDevice::~CAHALAudioDevice()
{
}

CFStringRef	CAHALAudioDevice::CopyDeviceUID() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDeviceUID);
	return GetPropertyData_CFString(theAddress, 0, NULL);
}

bool	CAHALAudioDevice::HasModelUID() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyModelUID);
	return HasProperty(theAddress);
}

CFStringRef	CAHALAudioDevice::CopyModelUID() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyModelUID);
	return GetPropertyData_CFString(theAddress, 0, NULL);
}

CFStringRef	CAHALAudioDevice::CopyConfigurationApplicationBundleID() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyConfigurationApplication);
	return GetPropertyData_CFString(theAddress, 0, NULL);
}

CFURLRef	CAHALAudioDevice::CopyIconLocation() const
{
	CFURLRef theAnswer = NULL;
	CAPropertyAddress theAddress(kAudioDevicePropertyIcon);
	UInt32 theSize = sizeof(CFURLRef);
	GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
	return theAnswer;
}

UInt32	CAHALAudioDevice::GetTransportType() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyTransportType);
	return GetPropertyData_UInt32(theAddress, 0, NULL);
}

bool	CAHALAudioDevice::CanBeDefaultDevice(bool inIsInput, bool inIsSystem) const
{
	CAPropertyAddress theAddress(inIsSystem ? kAudioDevicePropertyDeviceCanBeDefaultSystemDevice : kAudioDevicePropertyDeviceCanBeDefaultDevice, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	return GetPropertyData_UInt32(theAddress, 0, NULL) != 0;
}

bool	CAHALAudioDevice::HasDevicePlugInStatus() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPlugIn);
	return HasProperty(theAddress);
}

OSStatus	CAHALAudioDevice::GetDevicePlugInStatus() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPlugIn);
	return GetPropertyData_UInt32(theAddress, 0, NULL);
}

bool	CAHALAudioDevice::IsAlive() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDeviceIsAlive);
	return GetPropertyData_UInt32(theAddress, 0, NULL) != 0;
}

bool	CAHALAudioDevice::IsHidden() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyIsHidden);
	return GetPropertyData_UInt32(theAddress, 0, NULL) != 0;
}

pid_t	CAHALAudioDevice::GetHogModeOwner() const
{
	pid_t theAnswer = -1;
	CAPropertyAddress theAddress(kAudioDevicePropertyHogMode);
	if(HasProperty(theAddress))
	{
		UInt32 theSize = sizeof(pid_t);
		GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
	}
	return theAnswer;
}

bool	CAHALAudioDevice::IsHogModeSettable() const
{
	bool theAnswer = false;
	CAPropertyAddress theAddress(kAudioDevicePropertyHogMode);
	if(HasProperty(theAddress))
	{
		theAnswer = IsPropertySettable(theAddress);
	}
	return theAnswer;
}

bool	CAHALAudioDevice::TakeHogMode()
{
	CAPropertyAddress theAddress(kAudioDevicePropertyHogMode);
	pid_t thePID = getpid();
	if(HasProperty(theAddress))
	{
		SetPropertyData(theAddress, 0, NULL, sizeof(pid_t), &thePID);
	}
	return thePID == getpid();
}

void	CAHALAudioDevice::ReleaseHogMode()
{
	CAPropertyAddress theAddress(kAudioDevicePropertyHogMode);
	if(HasProperty(theAddress))
	{
		pid_t thePID = -1;
		SetPropertyData(theAddress, 0, NULL, sizeof(pid_t), &thePID);
	}
}

bool	CAHALAudioDevice::HasPreferredStereoChannels(bool inIsInput) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPreferredChannelsForStereo, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	return HasProperty(theAddress);
}

void	CAHALAudioDevice::GetPreferredStereoChannels(bool inIsInput, UInt32& outLeft, UInt32& outRight) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPreferredChannelsForStereo, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	UInt32 theStereoPair[2] = { 0, 0 };
	UInt32 theSize = 2 * sizeof(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, theStereoPair);
	outLeft = theStereoPair[0];
	outRight = theStereoPair[1];
}

void	CAHALAudioDevice::SetPreferredStereoChannels(bool inIsInput, UInt32 inLeft, UInt32 inRight)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPreferredChannelsForStereo, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	UInt32 theStereoPair[2] = { inLeft, inRight };
	SetPropertyData(theAddress, 0, NULL, 2 * sizeof(UInt32), theStereoPair);
}

bool	CAHALAudioDevice::HasPreferredChannelLayout(bool inIsInput) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPreferredChannelLayout, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	return HasProperty(theAddress);
}

void	CAHALAudioDevice::GetPreferredChannelLayout(bool inIsInput, AudioChannelLayout& outChannelLayout) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPreferredChannelLayout, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	UInt32 theSize = (SizeOf32(AudioChannelLayout) - SizeOf32(AudioChannelDescription)) + GetTotalNumberChannels(inIsInput) * SizeOf32(AudioChannelDescription);
	GetPropertyData(theAddress, 0, NULL, theSize, &outChannelLayout);
}

void	CAHALAudioDevice::SetPreferredStereoChannels(bool inIsInput, AudioChannelLayout& inChannelLayout)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPreferredChannelLayout, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	UInt32 theSize = (SizeOf32(AudioChannelLayout) - SizeOf32(AudioChannelDescription)) + GetTotalNumberChannels(inIsInput) * SizeOf32(AudioChannelDescription);
	SetPropertyData(theAddress, 0, NULL, theSize, &inChannelLayout);
}

UInt32	CAHALAudioDevice::GetNumberRelatedAudioDevices() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyRelatedDevices);
	UInt32 theAnswer = 0;
	if(HasProperty(theAddress))
	{
		theAnswer = GetPropertyDataSize(theAddress, 0, NULL);
		theAnswer /= SizeOf32(AudioObjectID);
	}
	return theAnswer;
}

void	CAHALAudioDevice::GetRelatedAudioDevices(UInt32& ioNumberRelatedDevices, AudioObjectID* outRelatedDevices) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyRelatedDevices);
	if(HasProperty(theAddress))
	{
		UInt32 theSize = ioNumberRelatedDevices * SizeOf32(AudioObjectID);
		GetPropertyData(theAddress, 0, NULL, theSize, outRelatedDevices);
		ioNumberRelatedDevices = theSize / SizeOf32(AudioObjectID);
	}
	else
	{
		UInt32 theSize = ioNumberRelatedDevices * SizeOf32(AudioObjectID);
		memset(outRelatedDevices, 0, theSize);
		ioNumberRelatedDevices = 0;
	}
}

AudioObjectID	CAHALAudioDevice::GetRelatedAudioDeviceByIndex(UInt32 inIndex) const
{
	AudioObjectID theAnswer = kAudioObjectUnknown;
	UInt32 theNumberRelatedDevices = GetNumberRelatedAudioDevices();
	if((theNumberRelatedDevices > 0) && (inIndex < theNumberRelatedDevices))
	{
		CAAutoArrayDelete<AudioObjectID> theRelatedDeviceList(theNumberRelatedDevices);
		GetRelatedAudioDevices(theNumberRelatedDevices, theRelatedDeviceList);
		if((theNumberRelatedDevices > 0) && (inIndex < theNumberRelatedDevices))
		{
			theAnswer = theRelatedDeviceList[inIndex];
		}
	}
	return theAnswer;
}

UInt32	CAHALAudioDevice::GetNumberStreams(bool inIsInput) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyStreams, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	UInt32 theAnswer = GetPropertyDataSize(theAddress, 0, NULL);
	theAnswer /= SizeOf32(AudioObjectID);
	return theAnswer;
}

void	CAHALAudioDevice::GetStreams(bool inIsInput, UInt32& ioNumberStreams, AudioObjectID* outStreamList) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyStreams, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	UInt32 theSize = ioNumberStreams * SizeOf32(AudioObjectID);
	GetPropertyData(theAddress, 0, NULL, theSize, outStreamList);
	ioNumberStreams = theSize / SizeOf32(AudioObjectID);
}

AudioObjectID	CAHALAudioDevice::GetStreamByIndex(bool inIsInput, UInt32 inIndex) const
{
	AudioObjectID theAnswer = kAudioObjectUnknown;
	UInt32 theNumberStreams = GetNumberStreams(inIsInput);
	if((theNumberStreams > 0) && (inIndex < theNumberStreams))
	{
		CAAutoArrayDelete<AudioObjectID> theStreamList(theNumberStreams);
		GetStreams(inIsInput, theNumberStreams, theStreamList);
		if((theNumberStreams > 0) && (inIndex < theNumberStreams))
		{
			theAnswer = theStreamList[inIndex];
		}
	}
	return theAnswer;
}

UInt32	CAHALAudioDevice::GetTotalNumberChannels(bool inIsInput) const
{
	UInt32 theAnswer = 0;
	CAPropertyAddress theAddress(kAudioDevicePropertyStreamConfiguration, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	UInt32 theSize = GetPropertyDataSize(theAddress, 0, NULL);
	CAAutoFree<AudioBufferList> theBufferList(theSize);
	GetPropertyData(theAddress, 0, NULL, theSize, theBufferList);
	for(UInt32 theIndex = 0; theIndex < theBufferList->mNumberBuffers; ++theIndex)
	{
		theAnswer += theBufferList->mBuffers[theIndex].mNumberChannels;
	}
	return theAnswer;
}

void	CAHALAudioDevice::GetCurrentVirtualFormats(bool inIsInput, UInt32& ioNumberStreams, AudioStreamBasicDescription* outFormats) const
{
	ioNumberStreams = std::min(ioNumberStreams, GetNumberStreams(inIsInput));
	for(UInt32 theIndex = 0; theIndex < ioNumberStreams; ++theIndex)
	{
		CAHALAudioStream theStream(GetStreamByIndex(inIsInput, theIndex));
		theStream.GetCurrentVirtualFormat(outFormats[theIndex]);
	}
}

void	CAHALAudioDevice::GetCurrentPhysicalFormats(bool inIsInput, UInt32& ioNumberStreams, AudioStreamBasicDescription* outFormats) const
{
	ioNumberStreams = std::min(ioNumberStreams, GetNumberStreams(inIsInput));
	for(UInt32 theIndex = 0; theIndex < ioNumberStreams; ++theIndex)
	{
		CAHALAudioStream theStream(GetStreamByIndex(inIsInput, theIndex));
		theStream.GetCurrentPhysicalFormat(outFormats[theIndex]);
	}
}

bool	CAHALAudioDevice::IsRunning() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDeviceIsRunning);
	UInt32 theAnswer = GetPropertyData_UInt32(theAddress, 0, NULL);
	return theAnswer != 0;
}

bool	CAHALAudioDevice::IsRunningSomewhere() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDeviceIsRunningSomewhere);
	UInt32 theAnswer = 0;
	if(HasProperty(theAddress))
	{
		theAnswer = GetPropertyData_UInt32(theAddress, 0, NULL);
	}
	return theAnswer != 0;
}

UInt32	CAHALAudioDevice::GetLatency(bool inIsInput) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyLatency, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	return GetPropertyData_UInt32(theAddress, 0, NULL);
}

UInt32	CAHALAudioDevice::GetSafetyOffset(bool inIsInput) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySafetyOffset, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	return GetPropertyData_UInt32(theAddress, 0, NULL);
}

bool	CAHALAudioDevice::HasClockDomain() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyClockDomain);
	return HasProperty(theAddress);
}

UInt32	CAHALAudioDevice::GetClockDomain() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyClockDomain);
	return GetPropertyData_UInt32(theAddress, 0, NULL);
}

Float64	CAHALAudioDevice::GetActualSampleRate() const
{
	Float64 theAnswer = 0;
	CAPropertyAddress theAddress(kAudioDevicePropertyActualSampleRate);
	if(HasProperty(theAddress))
	{
		UInt32 theSize = sizeof(Float64);
		GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
	}
	else
	{
		theAnswer = GetNominalSampleRate();
	}
	return theAnswer;
}

Float64	CAHALAudioDevice::GetNominalSampleRate() const
{
	Float64 theAnswer = 0;
	CAPropertyAddress theAddress(kAudioDevicePropertyNominalSampleRate);
	UInt32 theSize = sizeof(Float64);
	GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
	return theAnswer;
}

void	CAHALAudioDevice::SetNominalSampleRate(Float64 inSampleRate)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyNominalSampleRate);
	SetPropertyData(theAddress, 0, NULL, sizeof(Float64), &inSampleRate);
}

UInt32	CAHALAudioDevice::GetNumberAvailableNominalSampleRateRanges() const
{
	UInt32 theAnswer = 0;
	CAPropertyAddress theAddress(kAudioDevicePropertyAvailableNominalSampleRates);
	if(HasProperty(theAddress))
	{
		UInt32 theSize = GetPropertyDataSize(theAddress, 0, NULL);
		theAnswer = theSize / SizeOf32(AudioValueRange);
	}
	return theAnswer;
}

void	CAHALAudioDevice::GetAvailableNominalSampleRateRanges(UInt32& ioNumberRanges, AudioValueRange* outRanges) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyAvailableNominalSampleRates);
	if(HasProperty(theAddress))
	{
		UInt32 theSize = ioNumberRanges * SizeOf32(AudioValueRange);
		GetPropertyData(theAddress, 0, NULL, theSize, outRanges);
		ioNumberRanges = theSize / SizeOf32(AudioValueRange);
	}
	else
	{
		ioNumberRanges = 0;
	}
}

void	CAHALAudioDevice::GetAvailableNominalSampleRateRangeByIndex(UInt32 inIndex, Float64& outMinimum, Float64& outMaximum) const
{
	UInt32 theNumberRanges = GetNumberAvailableNominalSampleRateRanges();
	ThrowIf(inIndex >= theNumberRanges, CAException(kAudioHardwareIllegalOperationError), "CAHALAudioDevice::GetAvailableNominalSampleRateRangeByIndex: index out of range");
	CAAutoArrayDelete<AudioValueRange> theRanges(theNumberRanges);
	GetAvailableNominalSampleRateRanges(theNumberRanges, theRanges);
	outMinimum = theRanges[inIndex].mMinimum;
	outMaximum = theRanges[inIndex].mMaximum;
}

bool	CAHALAudioDevice::IsValidNominalSampleRate(Float64 inSampleRate) const
{
	bool theAnswer = false;
	UInt32 theNumberRanges = GetNumberAvailableNominalSampleRateRanges();
	CAAutoArrayDelete<AudioValueRange> theRanges(theNumberRanges);
	GetAvailableNominalSampleRateRanges(theNumberRanges, theRanges);
	for(UInt32 theIndex = 0; !theAnswer && (theIndex < theNumberRanges); ++theIndex)
	{
		theAnswer = (inSampleRate >= theRanges[theIndex].mMinimum) && (inSampleRate <= theRanges[theIndex].mMinimum);
	}
	return theAnswer;
}

bool	CAHALAudioDevice::IsIOBufferSizeSettable() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyBufferFrameSize);
	return IsPropertySettable(theAddress);
}

UInt32	CAHALAudioDevice::GetIOBufferSize() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyBufferFrameSize);
	return GetPropertyData_UInt32(theAddress, 0, NULL);
}

void	CAHALAudioDevice::SetIOBufferSize(UInt32 inBufferSize)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyBufferFrameSize);
	SetPropertyData(theAddress, 0, NULL, sizeof(UInt32), &inBufferSize);
}

bool	CAHALAudioDevice::UsesVariableIOBufferSizes() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyUsesVariableBufferFrameSizes);
	return HasProperty(theAddress);
}

UInt32	CAHALAudioDevice::GetMaximumVariableIOBufferSize() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyUsesVariableBufferFrameSizes);
	return GetPropertyData_UInt32(theAddress, 0, NULL);
}

bool	CAHALAudioDevice::HasIOBufferSizeRange() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyBufferFrameSizeRange);
	return HasProperty(theAddress);
}

void	CAHALAudioDevice::GetIOBufferSizeRange(UInt32& outMinimum, UInt32& outMaximum) const
{
	AudioValueRange theAnswer = { 0, 0 };
	CAPropertyAddress theAddress(kAudioDevicePropertyBufferFrameSizeRange);
	UInt32 theSize = sizeof(AudioValueRange);
	GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
	outMinimum = static_cast<UInt32>(theAnswer.mMinimum);
	outMaximum = static_cast<UInt32>(theAnswer.mMaximum);
}

AudioDeviceIOProcID	CAHALAudioDevice::CreateIOProcID(AudioDeviceIOProc inIOProc, void* inClientData)
{
	AudioDeviceIOProcID theAnswer = NULL;
	OSStatus theError = AudioDeviceCreateIOProcID(mObjectID, inIOProc, inClientData, &theAnswer);
	ThrowIfError(theError, CAException(theError), "CAHALAudioDevice::CreateIOProcID: got an error creating the IOProc ID");
	return theAnswer;
}

void	CAHALAudioDevice::DestroyIOProcID(AudioDeviceIOProcID inIOProcID)
{
	OSStatus theError = AudioDeviceDestroyIOProcID(mObjectID, inIOProcID);
	ThrowIfError(theError, CAException(theError), "CAHALAudioDevice::DestroyIOProcID: got an error destroying the IOProc ID");
}

void	CAHALAudioDevice::StartIOProc(AudioDeviceIOProcID inIOProcID)
{
	OSStatus theError = AudioDeviceStart(mObjectID, inIOProcID);
	ThrowIfError(theError, CAException(theError), "CAHALAudioDevice::StartIOProc: got an error starting an IOProc");
}

void	CAHALAudioDevice::StartIOProcAtTime(AudioDeviceIOProcID inIOProcID, AudioTimeStamp& ioStartTime, bool inIsInput, bool inIgnoreHardware)
{
	UInt32 theFlags = 0;
	if(inIsInput)
	{
		theFlags |= kAudioDeviceStartTimeIsInputFlag;
	}
	if(inIgnoreHardware)
	{
		theFlags |= kAudioDeviceStartTimeDontConsultDeviceFlag;
	}

	OSStatus theError = AudioDeviceStartAtTime(mObjectID, inIOProcID, &ioStartTime, theFlags);
	ThrowIfError(theError, CAException(theError), "CAHALAudioDevice::StartIOProcAtTime: got an error starting an IOProc");
}

void	CAHALAudioDevice::StopIOProc(AudioDeviceIOProcID inIOProcID)
{
	OSStatus theError = AudioDeviceStop(mObjectID, inIOProcID);
	ThrowIfError(theError, CAException(theError), "CAHALAudioDevice::StopIOProc: got an error stopping an IOProc");
}

void	CAHALAudioDevice::GetIOProcStreamUsage(AudioDeviceIOProcID inIOProcID, bool inIsInput, bool* outStreamUsage) const
{
	//	make an AudioHardwareIOProcStreamUsage the right size
	UInt32 theNumberStreams = GetNumberStreams(inIsInput);
	UInt32 theSize = SizeOf32(void*) + SizeOf32(UInt32) + (theNumberStreams * SizeOf32(UInt32));
	CAAutoFree<AudioHardwareIOProcStreamUsage> theStreamUsage(theSize);

	//	set it up
	theStreamUsage->mIOProc = reinterpret_cast<void*>(inIOProcID);
	theStreamUsage->mNumberStreams = theNumberStreams;

	//	get the property
	CAPropertyAddress theAddress(kAudioDevicePropertyIOProcStreamUsage, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	GetPropertyData(theAddress, 0, NULL, theSize, theStreamUsage);

	//	fill out the return value
	for(UInt32 theIndex = 0; theIndex < theNumberStreams; ++theIndex)
	{
		outStreamUsage[theIndex] = (theStreamUsage->mStreamIsOn[theIndex] != 0);
	}
}

void	CAHALAudioDevice::SetIOProcStreamUsage(AudioDeviceIOProcID inIOProcID, bool inIsInput, const bool* inStreamUsage)
{
	//	make an AudioHardwareIOProcStreamUsage the right size
	UInt32 theNumberStreams = GetNumberStreams(inIsInput);
	UInt32 theSize = SizeOf32(void*) + SizeOf32(UInt32) + (theNumberStreams * SizeOf32(UInt32));
	CAAutoFree<AudioHardwareIOProcStreamUsage> theStreamUsage(theSize);

	//	set it up
	theStreamUsage->mIOProc = reinterpret_cast<void*>(inIOProcID);
	theStreamUsage->mNumberStreams = theNumberStreams;
	for(UInt32 theIndex = 0; theIndex < theNumberStreams; ++theIndex)
	{
		theStreamUsage->mStreamIsOn[theIndex] = (inStreamUsage[theIndex] ? 1 : 0);
	}

	//	set the property
	CAPropertyAddress theAddress(kAudioDevicePropertyIOProcStreamUsage, inIsInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput);
	SetPropertyData(theAddress, 0, NULL, theSize, theStreamUsage);
}

Float32	CAHALAudioDevice::GetIOCycleUsage() const
{
	Float32 theAnswer = 0;
	CAPropertyAddress theAddress(kAudioDevicePropertyIOCycleUsage);
	UInt32 theSize = sizeof(Float32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
	return theAnswer;
}

void	CAHALAudioDevice::SetIOCycleUsage(Float32 inValue)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyIOCycleUsage);
	SetPropertyData(theAddress, 0, NULL, sizeof(Float32), &inValue);
}

void	CAHALAudioDevice::GetCurrentTime(AudioTimeStamp& outTime)
{
	OSStatus theError = AudioDeviceGetCurrentTime(mObjectID, &outTime);
	ThrowIfError(theError, CAException(theError), "CAHALAudioDevice::GetCurrentTime: got an error getting the current time");
}

void	CAHALAudioDevice::TranslateTime(const AudioTimeStamp& inTime, AudioTimeStamp& outTime)
{
	OSStatus theError = AudioDeviceTranslateTime(mObjectID, &inTime, &outTime);
	ThrowIfError(theError, CAException(theError), "CAHALAudioDevice::TranslateTime: got an error translating time");
}

void	CAHALAudioDevice::GetNearestStartTime(AudioTimeStamp& ioTime, bool inIsInput, bool inIgnoreHardware)
{
	UInt32 theFlags = 0;
	if(inIsInput)
	{
		theFlags |= kAudioDeviceStartTimeIsInputFlag;
	}
	if(inIgnoreHardware)
	{
		theFlags |= kAudioDeviceStartTimeDontConsultDeviceFlag;
	}

	OSStatus theError = AudioDeviceGetNearestStartTime(mObjectID, &ioTime, theFlags);
	ThrowIfError(theError, CAException(theError), "CAHALAudioDevice::GetNearestStartTime: got an error getting the start time");
}

bool	CAHALAudioDevice::HasVolumeControl(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyVolumeScalar, inScope, inChannel);
	return HasProperty(theAddress);
}

bool	CAHALAudioDevice::VolumeControlIsSettable(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyVolumeScalar, inScope, inChannel);
	return IsPropertySettable(theAddress);
}

Float32	CAHALAudioDevice::GetVolumeControlScalarValue(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyVolumeScalar, inScope, inChannel);
	Float32 theValue = 0.0f;
	UInt32 theSize = sizeof(Float32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue;
}

Float32	CAHALAudioDevice::GetVolumeControlDecibelValue(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyVolumeDecibels, inScope, inChannel);
	Float32 theValue = 0.0f;
	UInt32 theSize = sizeof(Float32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue;
}

void	CAHALAudioDevice::SetVolumeControlScalarValue(AudioObjectPropertyScope inScope, UInt32 inChannel, Float32 inValue)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyVolumeScalar, inScope, inChannel);
	SetPropertyData(theAddress, 0, NULL, sizeof(Float32), &inValue);
}

void	CAHALAudioDevice::SetVolumeControlDecibelValue(AudioObjectPropertyScope inScope, UInt32 inChannel, Float32 inValue)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyVolumeDecibels, inScope, inChannel);
	SetPropertyData(theAddress, 0, NULL, sizeof(Float32), &inValue);
}

Float32	CAHALAudioDevice::GetVolumeControlScalarForDecibelValue(AudioObjectPropertyScope inScope, UInt32 inChannel, Float32 inValue) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyVolumeDecibelsToScalar, inScope, inChannel);
	Float32 theValue = inValue;
	UInt32 theSize = sizeof(Float32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue;
}

Float32	CAHALAudioDevice::GetVolumeControlDecibelForScalarValue(AudioObjectPropertyScope inScope, UInt32 inChannel, Float32 inValue) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyVolumeScalarToDecibels, inScope, inChannel);
	Float32 theValue = inValue;
	UInt32 theSize = sizeof(Float32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue;
}

bool	CAHALAudioDevice::HasSubVolumeControl(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySubVolumeScalar, inScope, inChannel);
	return HasProperty(theAddress);
}

bool	CAHALAudioDevice::SubVolumeControlIsSettable(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySubVolumeScalar, inScope, inChannel);
	return IsPropertySettable(theAddress);
}

Float32	CAHALAudioDevice::GetSubVolumeControlScalarValue(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySubVolumeScalar, inScope, inChannel);
	Float32 theValue = 0.0f;
	UInt32 theSize = sizeof(Float32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue;
}

Float32	CAHALAudioDevice::GetSubVolumeControlDecibelValue(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySubVolumeDecibels, inScope, inChannel);
	Float32 theValue = 0.0f;
	UInt32 theSize = sizeof(Float32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue;
}

void	CAHALAudioDevice::SetSubVolumeControlScalarValue(AudioObjectPropertyScope inScope, UInt32 inChannel, Float32 inValue)
{
	CAPropertyAddress theAddress(kAudioDevicePropertySubVolumeScalar, inScope, inChannel);
	SetPropertyData(theAddress, 0, NULL, sizeof(Float32), &inValue);
}

void	CAHALAudioDevice::SetSubVolumeControlDecibelValue(AudioObjectPropertyScope inScope, UInt32 inChannel, Float32 inValue)
{
	CAPropertyAddress theAddress(kAudioDevicePropertySubVolumeDecibels, inScope, inChannel);
	SetPropertyData(theAddress, 0, NULL, sizeof(Float32), &inValue);
}

Float32	CAHALAudioDevice::GetSubVolumeControlScalarForDecibelValue(AudioObjectPropertyScope inScope, UInt32 inChannel, Float32 inValue) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySubVolumeDecibelsToScalar, inScope, inChannel);
	Float32 theValue = inValue;
	UInt32 theSize = sizeof(Float32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue;
}

Float32	CAHALAudioDevice::GetSubVolumeControlDecibelForScalarValue(AudioObjectPropertyScope inScope, UInt32 inChannel, Float32 inValue) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySubVolumeScalarToDecibels, inScope, inChannel);
	Float32 theValue = inValue;
	UInt32 theSize = sizeof(Float32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue;
}

bool	CAHALAudioDevice::HasMuteControl(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyMute, inScope, inChannel);
	return HasProperty(theAddress);
}

bool	CAHALAudioDevice::MuteControlIsSettable(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyMute, inScope, inChannel);
	return IsPropertySettable(theAddress);
}

bool	CAHALAudioDevice::GetMuteControlValue(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyMute, inScope, inChannel);
	UInt32 theValue = 0;
	UInt32 theSize = sizeof(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue != 0;
}

void	CAHALAudioDevice::SetMuteControlValue(AudioObjectPropertyScope inScope, UInt32 inChannel, bool inValue)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyMute, inScope, inChannel);
	UInt32 theValue = (inValue ? 1 : 0);
	UInt32 theSize = sizeof(UInt32);
	SetPropertyData(theAddress, 0, NULL, theSize, &theValue);
}

bool	CAHALAudioDevice::HasSoloControl(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySolo, inScope, inChannel);
	return HasProperty(theAddress);
}

bool	CAHALAudioDevice::SoloControlIsSettable(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySolo, inScope, inChannel);
	return IsPropertySettable(theAddress);
}

bool	CAHALAudioDevice::GetSoloControlValue(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySolo, inScope, inChannel);
	UInt32 theValue = 0;
	UInt32 theSize = sizeof(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue != 0;
}

void	CAHALAudioDevice::SetSoloControlValue(AudioObjectPropertyScope inScope, UInt32 inChannel, bool inValue)
{
	CAPropertyAddress theAddress(kAudioDevicePropertySolo, inScope, inChannel);
	UInt32 theValue = (inValue ? 1 : 0);
	UInt32 theSize = sizeof(UInt32);
	SetPropertyData(theAddress, 0, NULL, theSize, &theValue);
}

bool	CAHALAudioDevice::HasStereoPanControl(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyStereoPan, inScope, inChannel);
	return HasProperty(theAddress);
}

bool	CAHALAudioDevice::StereoPanControlIsSettable(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyStereoPan, inScope, inChannel);
	return IsPropertySettable(theAddress);
}

Float32	CAHALAudioDevice::GetStereoPanControlValue(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyStereoPan, inScope, inChannel);
	Float32 theValue = 0.0f;
	UInt32 theSize = sizeof(Float32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue;
}

void	CAHALAudioDevice::SetStereoPanControlValue(AudioObjectPropertyScope inScope, UInt32 inChannel, Float32 inValue)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyStereoPan, inScope, inChannel);
	UInt32 theSize = sizeof(Float32);
	SetPropertyData(theAddress, 0, NULL, theSize, &inValue);
}

void	CAHALAudioDevice::GetStereoPanControlChannels(AudioObjectPropertyScope inScope, UInt32 inChannel, UInt32& outLeftChannel, UInt32& outRightChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyStereoPanChannels, inScope, inChannel);
	UInt32 theValue[2] = { 0, 0 };
	UInt32 theSize = 2 * sizeof(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, theValue);
	outLeftChannel = theValue[0];
	outRightChannel = theValue[1];
}

bool	CAHALAudioDevice::HasJackControl(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyJackIsConnected, inScope, inChannel);
	return HasProperty(theAddress);
}

bool	CAHALAudioDevice::GetJackControlValue(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyJackIsConnected, inScope, inChannel);
	UInt32 theValue = 0;
	UInt32 theSize = sizeof(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue != 0;
}

bool	CAHALAudioDevice::HasSubMuteControl(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySubMute, inScope, inChannel);
	return HasProperty(theAddress);
}

bool	CAHALAudioDevice::SubMuteControlIsSettable(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySubMute, inScope, inChannel);
	return IsPropertySettable(theAddress);
}

bool	CAHALAudioDevice::GetSubMuteControlValue(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertySubMute, inScope, inChannel);
	UInt32 theValue = 0;
	UInt32 theSize = sizeof(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue != 0;
}

void	CAHALAudioDevice::SetSubMuteControlValue(AudioObjectPropertyScope inScope, UInt32 inChannel, bool inValue)
{
	CAPropertyAddress theAddress(kAudioDevicePropertySubMute, inScope, inChannel);
	UInt32 theValue = (inValue ? 1 : 0);
	UInt32 theSize = sizeof(UInt32);
	SetPropertyData(theAddress, 0, NULL, theSize, &theValue);
}

bool	CAHALAudioDevice::HasiSubOwnerControl(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDriverShouldOwniSub, inScope, inChannel);
	return HasProperty(theAddress);
}

bool	CAHALAudioDevice::iSubOwnerControlIsSettable(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDriverShouldOwniSub, inScope, inChannel);
	return IsPropertySettable(theAddress);
}

bool	CAHALAudioDevice::GetiSubOwnerControlValue(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDriverShouldOwniSub, inScope, inChannel);
	UInt32 theValue = 0;
	UInt32 theSize = sizeof(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theValue);
	return theValue != 0;
}

void	CAHALAudioDevice::SetiSubOwnerControlValue(AudioObjectPropertyScope inScope, UInt32 inChannel, bool inValue)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDriverShouldOwniSub, inScope, inChannel);
	UInt32 theValue = (inValue ? 1 : 0);
	UInt32 theSize = sizeof(UInt32);
	SetPropertyData(theAddress, 0, NULL, theSize, &theValue);
}

bool	CAHALAudioDevice::HasDataSourceControl(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDataSource, inScope, inChannel);
	return HasProperty(theAddress);
}

bool	CAHALAudioDevice::DataSourceControlIsSettable(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDataSource, inScope, inChannel);
	return IsPropertySettable(theAddress);
}

UInt32	CAHALAudioDevice::GetCurrentDataSourceID(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDataSource, inScope, inChannel);
	UInt32 theAnswer = 0;
	UInt32 theSize = sizeof(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
	return theAnswer;
}

void	CAHALAudioDevice::SetCurrentDataSourceByID(AudioObjectPropertyScope inScope, UInt32 inChannel, UInt32 inID)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDataSource, inScope, inChannel);
	UInt32 theSize = sizeof(UInt32);
	SetPropertyData(theAddress, 0, NULL, theSize, &inID);
}

UInt32	CAHALAudioDevice::GetNumberAvailableDataSources(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDataSources, inScope, inChannel);
	UInt32 theAnswer = 0;
	if(HasProperty(theAddress))
	{
		UInt32 theSize = GetPropertyDataSize(theAddress, 0, NULL);
		theAnswer = theSize / SizeOf32(UInt32);
	}
	return theAnswer;
}

void	CAHALAudioDevice::GetAvailableDataSources(AudioObjectPropertyScope inScope, UInt32 inChannel, UInt32& ioNumberSources, UInt32* outSources) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDataSources, inScope, inChannel);
	UInt32 theNumberSources = std::min(GetNumberAvailableDataSources(inScope, inChannel), ioNumberSources);
	UInt32 theSize = theNumberSources * SizeOf32(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, outSources);
	ioNumberSources = theSize / SizeOf32(UInt32);
}

UInt32	CAHALAudioDevice::GetAvailableDataSourceByIndex(AudioObjectPropertyScope inScope, UInt32 inChannel, UInt32 inIndex) const
{
	AudioStreamID theAnswer = 0;
	UInt32 theNumberSources = GetNumberAvailableDataSources(inScope, inChannel);
	if((theNumberSources > 0) && (inIndex < theNumberSources))
	{
		CAAutoArrayDelete<UInt32> theSourceList(theNumberSources);
		GetAvailableDataSources(inScope, inChannel, theNumberSources, theSourceList);
		theAnswer = theSourceList[inIndex];
	}
	return theAnswer;
}

CFStringRef	CAHALAudioDevice::CopyDataSourceNameForID(AudioObjectPropertyScope inScope, UInt32 inChannel, UInt32 inID) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyDataSourceNameForIDCFString, inScope, inChannel);
	CFStringRef theAnswer = NULL;
	AudioValueTranslation theTranslation = { &inID, sizeof(UInt32), &theAnswer, sizeof(CFStringRef) };
	UInt32 theSize = sizeof(AudioValueTranslation);
	GetPropertyData(theAddress, 0, NULL, theSize, &theTranslation);
	return theAnswer;
}

bool	CAHALAudioDevice::HasDataDestinationControl(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPlayThruDestination, inScope, inChannel);
	return HasProperty(theAddress);
}

bool	CAHALAudioDevice::DataDestinationControlIsSettable(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPlayThruDestination, inScope, inChannel);
	return IsPropertySettable(theAddress);
}

UInt32	CAHALAudioDevice::GetCurrentDataDestinationID(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPlayThruDestination, inScope, inChannel);
	UInt32 theAnswer = 0;
	UInt32 theSize = sizeof(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
	return theAnswer;
}

void	CAHALAudioDevice::SetCurrentDataDestinationByID(AudioObjectPropertyScope inScope, UInt32 inChannel, UInt32 inID)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPlayThruDestination, inScope, inChannel);
	UInt32 theSize = sizeof(UInt32);
	SetPropertyData(theAddress, 0, NULL, theSize, &inID);
}

UInt32	CAHALAudioDevice::GetNumberAvailableDataDestinations(AudioObjectPropertyScope inScope, UInt32 inChannel) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPlayThruDestinations, inScope, inChannel);
	UInt32 theAnswer = 0;
	if(HasProperty(theAddress))
	{
		UInt32 theSize = GetPropertyDataSize(theAddress, 0, NULL);
		theAnswer = theSize / SizeOf32(UInt32);
	}
	return theAnswer;
}

void	CAHALAudioDevice::GetAvailableDataDestinations(AudioObjectPropertyScope inScope, UInt32 inChannel, UInt32& ioNumberDestinations, UInt32* outDestinations) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPlayThruDestinations, inScope, inChannel);
	UInt32 theNumberDestinations = std::min(GetNumberAvailableDataDestinations(inScope, inChannel), ioNumberDestinations);
	UInt32 theSize = theNumberDestinations * SizeOf32(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, outDestinations);
	ioNumberDestinations = theSize / SizeOf32(UInt32);
}

UInt32	CAHALAudioDevice::GetAvailableDataDestinationByIndex(AudioObjectPropertyScope inScope, UInt32 inChannel, UInt32 inIndex) const
{
	AudioStreamID theAnswer = 0;
	UInt32 theNumberDestinations = GetNumberAvailableDataDestinations(inScope, inChannel);
	if((theNumberDestinations > 0) && (inIndex < theNumberDestinations))
	{
		CAAutoArrayDelete<UInt32> theDestinationList(theNumberDestinations);
		GetAvailableDataDestinations(inScope, inChannel, theNumberDestinations, theDestinationList);
		theAnswer = theDestinationList[inIndex];
	}
	return theAnswer;
}

CFStringRef	CAHALAudioDevice::CopyDataDestinationNameForID(AudioObjectPropertyScope inScope, UInt32 inChannel, UInt32 inID) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyPlayThruDestinationNameForIDCFString, inScope, inChannel);
	CFStringRef theAnswer = NULL;
	AudioValueTranslation theTranslation = { &inID, sizeof(UInt32), &theAnswer, sizeof(CFStringRef) };
	UInt32 theSize = sizeof(AudioValueTranslation);
	GetPropertyData(theAddress, 0, NULL, theSize, &theTranslation);
	return theAnswer;
}

bool	CAHALAudioDevice::HasClockSourceControl() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyClockSource);
	return HasProperty(theAddress);
}

bool	CAHALAudioDevice::ClockSourceControlIsSettable() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyClockSource);
	return IsPropertySettable(theAddress);
}

UInt32	CAHALAudioDevice::GetCurrentClockSourceID() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyClockSource);
	UInt32 theAnswer = 0;
	UInt32 theSize = sizeof(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
	return theAnswer;
}

void	CAHALAudioDevice::SetCurrentClockSourceByID(UInt32 inID)
{
	CAPropertyAddress theAddress(kAudioDevicePropertyClockSource);
	UInt32 theSize = sizeof(UInt32);
	SetPropertyData(theAddress, 0, NULL, theSize, &inID);
}

UInt32	CAHALAudioDevice::GetNumberAvailableClockSources() const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyClockSources);
	UInt32 theAnswer = 0;
	if(HasProperty(theAddress))
	{
		UInt32 theSize = GetPropertyDataSize(theAddress, 0, NULL);
		theAnswer = theSize / SizeOf32(UInt32);
	}
	return theAnswer;
}

void	CAHALAudioDevice::GetAvailableClockSources(UInt32& ioNumberSources, UInt32* outSources) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyClockSources);
	UInt32 theNumberSources = std::min(GetNumberAvailableClockSources(), ioNumberSources);
	UInt32 theSize = theNumberSources * SizeOf32(UInt32);
	GetPropertyData(theAddress, 0, NULL, theSize, outSources);
	ioNumberSources = theSize / SizeOf32(UInt32);
}

UInt32	CAHALAudioDevice::GetAvailableClockSourceByIndex(UInt32 inIndex) const
{
	AudioStreamID theAnswer = 0;
	UInt32 theNumberSources = GetNumberAvailableClockSources();
	if((theNumberSources > 0) && (inIndex < theNumberSources))
	{
		CAAutoArrayDelete<UInt32> theSourceList(theNumberSources);
		GetAvailableClockSources(theNumberSources, theSourceList);
		theAnswer = theSourceList[inIndex];
	}
	return theAnswer;
}

CFStringRef	CAHALAudioDevice::CopyClockSourceNameForID(UInt32 inID) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyClockSourceNameForIDCFString);
	CFStringRef theAnswer = NULL;
	AudioValueTranslation theTranslation = { &inID, sizeof(UInt32), &theAnswer, sizeof(CFStringRef) };
	UInt32 theSize = sizeof(AudioValueTranslation);
	GetPropertyData(theAddress, 0, NULL, theSize, &theTranslation);
	return theAnswer;
}

UInt32	CAHALAudioDevice::GetClockSourceKindForID(UInt32 inID) const
{
	CAPropertyAddress theAddress(kAudioDevicePropertyClockSourceKindForID);
	UInt32 theAnswer = 0;
	AudioValueTranslation theTranslation = { &inID, sizeof(UInt32), &theAnswer, sizeof(UInt32) };
	UInt32 theSize = sizeof(AudioValueTranslation);
	GetPropertyData(theAddress, 0, NULL, theSize, &theTranslation);
	return theAnswer;
}