mirror of
https://github.com/kyleneideck/BackgroundMusic
synced 2024-11-23 04:33:03 +00:00
178 lines
7.2 KiB
C++
178 lines
7.2 KiB
C++
/*
|
|
File: CAVolumeCurve.h
|
|
Abstract: Part of CoreAudio Utility Classes
|
|
Version: 1.0.1
|
|
|
|
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) 2013 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
|