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

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/*
File: CAVolumeCurve.h
Abstract: Part of CoreAudio Utility Classes
Version: 1.1
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*/
#if !defined(__CAVolumeCurve_h__)
#define __CAVolumeCurve_h__
//=============================================================================
// Includes
//=============================================================================
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
#include <CoreAudio/CoreAudioTypes.h>
#else
#include <CoreAudioTypes.h>
#endif
#include <map>
//=============================================================================
// Types
//=============================================================================
struct CARawPoint
{
SInt32 mMinimum;
SInt32 mMaximum;
CARawPoint() : mMinimum(0), mMaximum(0) {}
CARawPoint(const CARawPoint& inPoint) : mMinimum(inPoint.mMinimum), mMaximum(inPoint.mMaximum) {}
CARawPoint(SInt32 inMinimum, SInt32 inMaximum) : mMinimum(inMinimum), mMaximum(inMaximum) {}
CARawPoint& operator=(const CARawPoint& inPoint) { mMinimum = inPoint.mMinimum; mMaximum = inPoint.mMaximum; return *this; }
static bool Overlap(const CARawPoint& x, const CARawPoint& y) { return (x.mMinimum < y.mMaximum) && (x.mMaximum > y.mMinimum); }
};
inline bool operator<(const CARawPoint& x, const CARawPoint& y) { return x.mMinimum < y.mMinimum; }
inline bool operator==(const CARawPoint& x, const CARawPoint& y) { return (x.mMinimum == y.mMinimum) && (x.mMaximum == y.mMaximum); }
inline bool operator!=(const CARawPoint& x, const CARawPoint& y) { return !(x == y); }
inline bool operator<=(const CARawPoint& x, const CARawPoint& y) { return (x < y) || (x == y); }
inline bool operator>=(const CARawPoint& x, const CARawPoint& y) { return !(x < y); }
inline bool operator>(const CARawPoint& x, const CARawPoint& y) { return !((x < y) || (x == y)); }
struct CADBPoint
{
Float32 mMinimum;
Float32 mMaximum;
CADBPoint() : mMinimum(0), mMaximum(0) {}
CADBPoint(const CADBPoint& inPoint) : mMinimum(inPoint.mMinimum), mMaximum(inPoint.mMaximum) {}
CADBPoint(Float32 inMinimum, Float32 inMaximum) : mMinimum(inMinimum), mMaximum(inMaximum) {}
CADBPoint& operator=(const CADBPoint& inPoint) { mMinimum = inPoint.mMinimum; mMaximum = inPoint.mMaximum; return *this; }
static bool Overlap(const CADBPoint& x, const CADBPoint& y) { return (x.mMinimum < y.mMaximum) && (x.mMaximum >= y.mMinimum); }
};
inline bool operator<(const CADBPoint& x, const CADBPoint& y) { return x.mMinimum < y.mMinimum; }
inline bool operator==(const CADBPoint& x, const CADBPoint& y) { return (x.mMinimum == y.mMinimum) && (x.mMaximum == y.mMaximum); }
inline bool operator!=(const CADBPoint& x, const CADBPoint& y) { return !(x == y); }
inline bool operator<=(const CADBPoint& x, const CADBPoint& y) { return (x < y) || (x == y); }
inline bool operator>=(const CADBPoint& x, const CADBPoint& y) { return !(x < y); }
inline bool operator>(const CADBPoint& x, const CADBPoint& y) { return !((x < y) || (x == y)); }
//=============================================================================
// CAVolumeCurve
//=============================================================================
class CAVolumeCurve
{
// Constants
public:
enum
{
kLinearCurve = 0,
kPow1Over3Curve = 1,
kPow1Over2Curve = 2,
kPow3Over4Curve = 3,
kPow3Over2Curve = 4,
kPow2Over1Curve = 5,
kPow3Over1Curve = 6,
kPow4Over1Curve = 7,
kPow5Over1Curve = 8,
kPow6Over1Curve = 9,
kPow7Over1Curve = 10,
kPow8Over1Curve = 11,
kPow9Over1Curve = 12,
kPow10Over1Curve = 13,
kPow11Over1Curve = 14,
kPow12Over1Curve = 15
};
// Construction/Destruction
public:
CAVolumeCurve();
virtual ~CAVolumeCurve();
// Attributes
public:
UInt32 GetTag() const { return mTag; }
void SetTag(UInt32 inTag) { mTag = inTag; }
SInt32 GetMinimumRaw() const;
SInt32 GetMaximumRaw() const;
Float32 GetMinimumDB() const;
Float32 GetMaximumDB() const;
void SetIsApplyingTransferFunction(bool inIsApplyingTransferFunction) { mIsApplyingTransferFunction = inIsApplyingTransferFunction; }
UInt32 GetTransferFunction() const { return mTransferFunction; }
void SetTransferFunction(UInt32 inTransferFunction);
// Operations
public:
void AddRange(SInt32 mMinRaw, SInt32 mMaxRaw, Float32 inMinDB, Float32 inMaxDB);
void ResetRange();
bool CheckForContinuity() const;
SInt32 ConvertDBToRaw(Float32 inDB) const;
Float32 ConvertRawToDB(SInt32 inRaw) const;
Float32 ConvertRawToScalar(SInt32 inRaw) const;
Float32 ConvertDBToScalar(Float32 inDB) const;
SInt32 ConvertScalarToRaw(Float32 inScalar) const;
Float32 ConvertScalarToDB(Float32 inScalar) const;
// Implementation
private:
typedef std::map<CARawPoint, CADBPoint> CurveMap;
UInt32 mTag;
CurveMap mCurveMap;
bool mIsApplyingTransferFunction;
UInt32 mTransferFunction;
Float32 mRawToScalarExponentNumerator;
Float32 mRawToScalarExponentDenominator;
};
#endif