/* |
File: CAVolumeCurve.h |
Abstract: Part of CoreAudio Utility Classes |
Version: 1.0.1 |
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*/ |
#if !defined(__CAVolumeCurve_h__) |
#define __CAVolumeCurve_h__ |
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//============================================================================= |
// Includes |
//============================================================================= |
|
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__) |
#include <CoreAudio/CoreAudioTypes.h> |
#else |
#include <CoreAudioTypes.h> |
#endif |
#include <map> |
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//============================================================================= |
// 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; |
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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); } |
}; |
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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 |
