livetrax/libs/appleutility/CoreAudio/PublicUtility/CAHALAudioObject.h

/*
     File: CAHALAudioObject.h
 Abstract: Part of CoreAudio Utility Classes
  Version: 1.1

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*/
#if !defined(__CAHALAudioObject_h__)
#define __CAHALAudioObject_h__

//==================================================================================================
//	Includes
//==================================================================================================

//	PublicUtility Includes
#include "CADebugMacros.h"
#include "CAException.h"

//	System Includes
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
	#include <CoreAudio/CoreAudio.h>
	#include <CoreFoundation/CoreFoundation.h>
#else
	#include <CoreAudio.h>
	#include <CoreFoundation.h>
#endif

//==================================================================================================
//	CAHALAudioObject
//==================================================================================================

class CAHALAudioObject
{

//	Construction/Destruction
public:
								CAHALAudioObject(AudioObjectID inObjectID);
	virtual						~CAHALAudioObject();

//	Attributes
public:
	AudioObjectID				GetObjectID() const;
	void						SetObjectID(AudioObjectID inObjectID);
	AudioClassID				GetClassID() const;
	AudioObjectID				GetOwnerObjectID() const;
	CFStringRef					CopyOwningPlugInBundleID() const;
	CFStringRef					CopyName() const;
	CFStringRef					CopyManufacturer() const;
	CFStringRef					CopyNameForElement(AudioObjectPropertyScope inScope, AudioObjectPropertyElement inElement) const;
	CFStringRef					CopyCategoryNameForElement(AudioObjectPropertyScope inScope, AudioObjectPropertyElement inElement) const;
	CFStringRef					CopyNumberNameForElement(AudioObjectPropertyScope inScope, AudioObjectPropertyElement inElement) const;

	static bool					ObjectExists(AudioObjectID inObjectID);

//	Owned Objects
public:
	UInt32						GetNumberOwnedObjects(AudioClassID inClass) const;
	void						GetAllOwnedObjects(AudioClassID inClass, UInt32& ioNumberObjects, AudioObjectID* ioObjectIDs) const;
	AudioObjectID				GetOwnedObjectByIndex(AudioClassID inClass, UInt32 inIndex);

//	Property Operations
public:
	bool						HasProperty(const AudioObjectPropertyAddress& inAddress) const;
	bool						IsPropertySettable(const AudioObjectPropertyAddress& inAddress) const;
	UInt32						GetPropertyDataSize(const AudioObjectPropertyAddress& inAddress, UInt32 inQualifierDataSize, const void* inQualifierData) const;

	void						GetPropertyData(const AudioObjectPropertyAddress& inAddress, UInt32 inQualifierDataSize, const void* inQualifierData, UInt32& ioDataSize, void* outData) const;
	void						SetPropertyData(const AudioObjectPropertyAddress& inAddress, UInt32 inQualifierDataSize, const void* inQualifierData, UInt32 inDataSize, const void* inData);

	UInt32						GetPropertyData_UInt32(const AudioObjectPropertyAddress& inAddress, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL) const										{ UInt32 theAnswer = 0; UInt32 theDataSize = SizeOf32(UInt32); GetPropertyData(inAddress, inQualifierDataSize, inQualifierData, theDataSize, &theAnswer); return theAnswer; }
	void						SetPropertyData_UInt32(const AudioObjectPropertyAddress& inAddress, UInt32 inValue, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL)								{ SetPropertyData(inAddress, inQualifierDataSize, inQualifierData, SizeOf32(UInt32), &inValue); }

	Float32						GetPropertyData_Float32(const AudioObjectPropertyAddress& inAddress, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL) const										{ Float32 theAnswer = 0; UInt32 theDataSize = SizeOf32(Float32); GetPropertyData(inAddress, inQualifierDataSize, inQualifierData, theDataSize, &theAnswer); return theAnswer; }
	void						SetPropertyData_Float32(const AudioObjectPropertyAddress& inAddress, Float32 inValue, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL)							{ SetPropertyData(inAddress, inQualifierDataSize, inQualifierData, SizeOf32(Float32), &inValue); }

	Float64						GetPropertyData_Float64(const AudioObjectPropertyAddress& inAddress, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL) const										{ Float64 theAnswer = 0; UInt32 theDataSize = SizeOf32(Float64); GetPropertyData(inAddress, inQualifierDataSize, inQualifierData, theDataSize, &theAnswer); return theAnswer; }
	void						SetPropertyData_Float64(const AudioObjectPropertyAddress& inAddress, Float64 inValue, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL)							{ SetPropertyData(inAddress, inQualifierDataSize, inQualifierData, SizeOf32(Float64), &inValue); }

	CFTypeRef					GetPropertyData_CFType(const AudioObjectPropertyAddress& inAddress, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL) const										{ CFTypeRef theAnswer = NULL; UInt32 theDataSize = SizeOf32(CFTypeRef); GetPropertyData(inAddress, inQualifierDataSize, inQualifierData, theDataSize, &theAnswer); return theAnswer; }
	void						SetPropertyData_CFType(const AudioObjectPropertyAddress& inAddress, CFTypeRef inValue, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL)								{ SetPropertyData(inAddress, inQualifierDataSize, inQualifierData, SizeOf32(CFTypeRef), &inValue); }

	CFStringRef					GetPropertyData_CFString(const AudioObjectPropertyAddress& inAddress, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL) const										{ CFStringRef theAnswer = NULL; UInt32 theDataSize = SizeOf32(CFStringRef); GetPropertyData(inAddress, inQualifierDataSize, inQualifierData, theDataSize, &theAnswer); return theAnswer; }
	void						SetPropertyData_CFString(const AudioObjectPropertyAddress& inAddress, CFStringRef inValue, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL)							{ SetPropertyData(inAddress, inQualifierDataSize, inQualifierData, SizeOf32(CFStringRef), &inValue); }

	template <class T> void		GetPropertyData_Struct(const AudioObjectPropertyAddress& inAddress, T& outStruct, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL) const							{ UInt32 theDataSize = SizeOf32(T); GetPropertyData(inAddress, inQualifierDataSize, inQualifierData, theDataSize, &outStruct); }
	template <class T> void		SetPropertyData_Struct(const AudioObjectPropertyAddress& inAddress, T& inStruct, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL)								{ SetPropertyData(inAddress, inQualifierDataSize, inQualifierData, SizeOf32(T), &inStruct); }

	template <class T> UInt32	GetPropertyData_ArraySize(const AudioObjectPropertyAddress& inAddress, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL) const									{ return GetPropertyDataSize(inAddress, inQualifierDataSize, inQualifierData) / SizeOf32(T); }
	template <class T> void		GetPropertyData_Array(const AudioObjectPropertyAddress& inAddress, UInt32& ioNumberItems, T* outArray, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL) const	{ UInt32 theDataSize = ioNumberItems * SizeOf32(T); GetPropertyData(inAddress, inQualifierDataSize, inQualifierData, theDataSize, outArray); ioNumberItems = theDataSize / SizeOf32(T); }
	template <class T> void		SetPropertyData_Array(const AudioObjectPropertyAddress& inAddress, UInt32 inNumberItems, T* inArray, UInt32 inQualifierDataSize = 0, const void* inQualifierData = NULL)			{ SetPropertyData(inAddress, inQualifierDataSize, inQualifierData, inNumberItems * SizeOf32(T), inArray); }

	void						AddPropertyListener(const AudioObjectPropertyAddress& inAddress, AudioObjectPropertyListenerProc inListenerProc, void* inClientData);
	void						RemovePropertyListener(const AudioObjectPropertyAddress& inAddress, AudioObjectPropertyListenerProc inListenerProc, void* inClientData);

	void						AddPropertyListenerBlock(const AudioObjectPropertyAddress& inAddress, dispatch_queue_t inDispatchQueue, AudioObjectPropertyListenerBlock inListenerBlock);
	void						RemovePropertyListenerBlock(const AudioObjectPropertyAddress& inAddress, dispatch_queue_t inDispatchQueue, AudioObjectPropertyListenerBlock inListenerBlock);

//	Implementation
protected:
	AudioObjectID				mObjectID;

};

inline void	CAHALAudioObject::AddPropertyListenerBlock(const AudioObjectPropertyAddress& inAddress, dispatch_queue_t inDispatchQueue, AudioObjectPropertyListenerBlock inListenerBlock)
{
	OSStatus theError = AudioObjectAddPropertyListenerBlock(mObjectID, &inAddress, inDispatchQueue, inListenerBlock);
	ThrowIfError(theError, CAException(theError), "CAHALAudioObject::AddPropertyListenerBlock: got an error adding a property listener");
}

inline void	CAHALAudioObject::RemovePropertyListenerBlock(const AudioObjectPropertyAddress& inAddress, dispatch_queue_t inDispatchQueue, AudioObjectPropertyListenerBlock inListenerBlock)
{
	OSStatus theError = AudioObjectRemovePropertyListenerBlock(mObjectID, &inAddress, inDispatchQueue, inListenerBlock);
	ThrowIfError(theError, CAException(theError), "CAHALAudioObject::RemovePropertyListener: got an error removing a property listener");
}

#endif