/*

     File: AUParamInfo.h

 Abstract: Part of CoreAudio Utility Classes

  Version: 1.1

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*/

#include <map>

#include <vector>

#include <AudioUnit/AudioUnit.h>

#include "CAAUParameter.h"

/*

    The ParameterMap returned by the Map() method is a map where 

        - the key is the clumpID

        - the value is a ParameterList (vector<CAAUParameter>)

    If you have parameters on multiple scopes (or elements within a scope), then you should create one of these 

    for each scope-element pair

*/

class AUParamInfo {

public:

    typedef std::vector <CAAUParameter> ParameterList;

    typedef std::map <UInt32, ParameterList, std::less<UInt32> > ParameterMap;

                            AUParamInfo (AudioUnit      inAU, 

                                    bool                inIncludeExpert, 

                                    bool                inIncludeReadOnly, 

                                    AudioUnitScope      inScope = kAudioUnitScope_Global,

                                    AudioUnitElement    inElement = 0);

                            ~AUParamInfo();

    const ParameterMap&     Map () const { return mParams; }

    // some convenience methods

    UInt32                  NumParams () const { return mNumParams; }

    AudioUnitParameterID    ParamID (UInt32 inIndex) const 

                            { 

                                if (inIndex < mNumParams) return mParamListID[inIndex]; 

                                return 0xFFFFFFFF; 

                            }

    UInt32                  NumClumps () const { return static_cast<UInt32>(mParams.size()); }

    UInt32                  NumParamsForClump (UInt32 inClump) const;

            // returns NULL if there's no info for the parameter

    const CAAUParameter*    GetParamInfo (AudioUnitParameterID inParamID) const;

    AudioUnitScope          GetScope () const { return mScope; }

    AudioUnitElement        GetElement () const { return mElement; }

private:

    AudioUnit               mAU;

    UInt32                  mNumParams;

    AudioUnitParameterID *  mParamListID;

    ParameterMap            mParams;

    AudioUnitScope          mScope;

    AudioUnitElement        mElement;

        // disallow

    AUParamInfo () {}

    AUParamInfo (const AUParamInfo &c) {}

    AUParamInfo& operator= (const AUParamInfo& c) { return *this; }

};