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

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/*
File: CAComponent.h
Abstract: Part of CoreAudio Utility Classes
Version: 1.1
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*/
#ifndef __CAComponent_h__
#define __CAComponent_h__
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
#else
#include <ConditionalMacros.h>
#endif
#include "CAComponentDescription.h"
class CAComponent
{
public:
CAComponent ()
: mComp (0), mDesc(), mManuName(0), mAUName(0), mCompName(0) {}
// if next is specifed that is used to find the next component after that one
CAComponent (const AudioComponentDescription& inDesc, CAComponent* next = 0);
CAComponent (const CAComponent& y)
: mComp (0), mDesc(), mManuName(0), mAUName(0), mCompName(0) { *this = y; }
CAComponent (const AudioComponent& comp);
CAComponent (const AudioComponentInstance& compInst);
CAComponent (OSType inType, OSType inSubtype = 0, OSType inManu = 0);
~CAComponent ();
CAComponent& operator= (const CAComponent& y);
// returns true if this object references a valid component
bool IsValid () const { return Comp() != 0; }
bool HasAUStrings() const { SetCompNames (); return mManuName != 0; }
// CFStringRef should be retained by caller if needed beyond lifetime of this object
// Can return NULL if component doesn't follow AU naming conventions
CFStringRef GetAUManu () const { SetCompNames (); return mManuName; }
CFStringRef GetAUName () const { SetCompNames (); return mAUName ? mAUName : mCompName; }
// Return value of NULL indicates a problem getting that information from the component
CFStringRef GetCompName () const { SetCompNames(); return mCompName; }
const CAComponentDescription& Desc () const { return mDesc; }
OSStatus Open (AudioComponentInstance& outInst) const
{
return AudioComponentInstanceNew (Comp(), &outInst);
}
OSStatus GetVersion (UInt32 &outVersion) const;
const AudioComponent& Comp() const { return mComp; }
void Print(FILE* file = stdout) const;
OSStatus Save (CFPropertyListRef *outData) const;
OSStatus Restore (CFPropertyListRef &inData);
private:
AudioComponent mComp;
CAComponentDescription mDesc;
CFStringRef mManuName, mAUName, mCompName;
void SetCompNames () const;
void SetCompInfo () const;
void Clear ();
};
#endif