CAComponentDescription.h

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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    IsEffect () const { return IsAUFX() || IsAUFM() || IsPanner(); }
    
    bool    IsOffline () const { return componentType == 'auol'; }
    
    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