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

/*
     File: CAComponentDescription.h
 Abstract: Part of CoreAudio Utility Classes
  Version: 1.1
 
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 license, under Apple's copyrights in this original Apple software (the
 "Apple Software"), to use, reproduce, modify and redistribute the Apple
 Software, with or without modifications, in source and/or binary forms;
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 Neither the name, trademarks, service marks or logos of Apple Inc. may
 be used to endorse or promote products derived from the Apple Software
 without specific prior written permission from Apple.  Except as
 expressly stated in this notice, no other rights or licenses, express or
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 The Apple Software is provided by Apple on an "AS IS" basis.  APPLE
 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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*/
#ifndef __CAComponentDescription_h__
#define __CAComponentDescription_h__

#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
	#include <AudioUnit/AudioUnit.h>
#else
	#include <ConditionalMacros.h>
	#include <AudioUnit.h>
#endif

#include "CACFDictionary.h"
#include <stdio.h>
#include <string.h>

void CAShowComponentDescription(const AudioComponentDescription *desc);

// ____________________________________________________________________________
//
//	CAComponentDescription
class CAComponentDescription : public AudioComponentDescription {
public:
	CAComponentDescription() { memset (this, 0, sizeof (AudioComponentDescription)); }
	
	CAComponentDescription (OSType inType, OSType inSubtype = 0, OSType inManu = 0);

	CAComponentDescription(const AudioComponentDescription& desc) { memcpy (this, &desc, sizeof (AudioComponentDescription)); }
		
	// _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
	//
	// interrogation
	
	bool	IsAU () const;
	
	bool	IsAUFX() const { return componentType == kAudioUnitType_Effect; }
	bool	IsAUFM() const { return componentType == kAudioUnitType_MusicEffect; }
    
    bool    IsAUMI() const { return componentType == 'aumi' /*kAudioUnitType_MIDIProcessor*/; }
	
	bool	IsAUAX () const { return componentType == 'auax' /*kAudioUnitType_Auxiliary*/; }
	
	bool 	IsEffect () const { return IsAUFX() || IsAUFM() || IsPanner(); }
	
	bool	IsOffline () const { return componentType == 'auol' /*kAudioUnitType_Offline*/; }
	
	bool 	IsFConv () const { return componentType == kAudioUnitType_FormatConverter; }
	
	bool	IsPanner () const { return componentType == kAudioUnitType_Panner; }
	
	bool	IsMusicDevice () const { return componentType == kAudioUnitType_MusicDevice; }
	
#ifndef MAC_OS_X_VERSION_10_4
	bool	IsGenerator () const { return componentType =='augn'; }
#else
	bool	IsGenerator () const { return componentType ==kAudioUnitType_Generator; }
#endif
	
	bool	IsOutput () const { return componentType == kAudioUnitType_Output; }
	
	bool	IsSource () const { return IsMusicDevice() || IsGenerator(); }
	
	OSType	Type () const { return componentType; }
	OSType	SubType () const { return componentSubType; }
	OSType 	Manu () const { return componentManufacturer; }

	int		Count() const { return AudioComponentCount(const_cast<CAComponentDescription*>(this)); }
	
		// does a semantic match where "wild card" values for type, subtype, manu will match
	bool	Matches (const AudioComponentDescription &desc) const;
	
	// _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
	//
	//	other
	
	void	Print(FILE* file = stdout) const 	{ _CAShowComponentDescription (this, file); }

	OSStatus			Save (CFPropertyListRef *outData) const;
	OSStatus			Restore (CFPropertyListRef &inData);

private:
	static void _CAShowComponentDescription (const AudioComponentDescription *desc, FILE* file);
	friend void CAShowComponentDescription (const AudioComponentDescription *desc);
};

inline bool	operator< (const AudioComponentDescription& x, const AudioComponentDescription& y)
{
	return memcmp (&x, &y, offsetof (AudioComponentDescription, componentFlags)) < 0;
}

inline bool	operator== (const AudioComponentDescription& x, const AudioComponentDescription& y)
{
	return !memcmp (&x, &y, offsetof (AudioComponentDescription, componentFlags));
}

inline bool	operator!= (const AudioComponentDescription& x, const AudioComponentDescription& y)
{
	return !(x == y);
}

#endif