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/*
File: CAVolumeCurve.h
Abstract: Part of CoreAudio Utility Classes
Version: 1.1
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
Inc. ("Apple") in consideration of your agreement to the following
terms, and your use, installation, modification or redistribution of
this Apple software constitutes acceptance of these terms. If you do
not agree with these terms, please do not use, install, modify or
redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
"Apple Software"), to use, reproduce, modify and redistribute the Apple
Software, with or without modifications, in source and/or binary forms;
provided that if you redistribute the Apple Software in its entirety and
without modifications, you must retain this notice and the following
text and disclaimers in all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or logos of Apple Inc. may
be used to endorse or promote products derived from the Apple Software
without specific prior written permission from Apple. Except as
expressly stated in this notice, no other rights or licenses, express or
implied, are granted by Apple herein, including but not limited to any
patent rights that may be infringed by your derivative works or by other
works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Copyright (C) 2014 Apple Inc. All Rights Reserved.
*/
#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
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