179 lines
7.2 KiB
C++
179 lines
7.2 KiB
C++
/*
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File: CAVolumeCurve.h
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Abstract: Part of CoreAudio Utility Classes
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Version: 1.1
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Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
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Inc. ("Apple") in consideration of your agreement to the following
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terms, and your use, installation, modification or redistribution of
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this Apple software constitutes acceptance of these terms. If you do
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not agree with these terms, please do not use, install, modify or
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redistribute this Apple software.
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In consideration of your agreement to abide by the following terms, and
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subject to these terms, Apple grants you a personal, non-exclusive
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license, under Apple's copyrights in this original Apple software (the
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"Apple Software"), to use, reproduce, modify and redistribute the Apple
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Software, with or without modifications, in source and/or binary forms;
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provided that if you redistribute the Apple Software in its entirety and
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without modifications, you must retain this notice and the following
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text and disclaimers in all such redistributions of the Apple Software.
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Neither the name, trademarks, service marks or logos of Apple Inc. may
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be used to endorse or promote products derived from the Apple Software
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without specific prior written permission from Apple. Except as
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expressly stated in this notice, no other rights or licenses, express or
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implied, are granted by Apple herein, including but not limited to any
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patent rights that may be infringed by your derivative works or by other
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works in which the Apple Software may be incorporated.
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The Apple Software is provided by Apple on an "AS IS" basis. APPLE
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MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
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OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
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MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
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AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
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STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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Copyright (C) 2014 Apple Inc. All Rights Reserved.
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*/
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#if !defined(__CAVolumeCurve_h__)
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#define __CAVolumeCurve_h__
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//=============================================================================
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// Includes
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//=============================================================================
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#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
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#include <CoreAudio/CoreAudioTypes.h>
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#else
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#include <CoreAudioTypes.h>
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#endif
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#include <map>
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//=============================================================================
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// Types
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//=============================================================================
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struct CARawPoint
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{
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SInt32 mMinimum;
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SInt32 mMaximum;
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CARawPoint() : mMinimum(0), mMaximum(0) {}
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CARawPoint(const CARawPoint& inPoint) : mMinimum(inPoint.mMinimum), mMaximum(inPoint.mMaximum) {}
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CARawPoint(SInt32 inMinimum, SInt32 inMaximum) : mMinimum(inMinimum), mMaximum(inMaximum) {}
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CARawPoint& operator=(const CARawPoint& inPoint) { mMinimum = inPoint.mMinimum; mMaximum = inPoint.mMaximum; return *this; }
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static bool Overlap(const CARawPoint& x, const CARawPoint& y) { return (x.mMinimum < y.mMaximum) && (x.mMaximum > y.mMinimum); }
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};
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inline bool operator<(const CARawPoint& x, const CARawPoint& y) { return x.mMinimum < y.mMinimum; }
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inline bool operator==(const CARawPoint& x, const CARawPoint& y) { return (x.mMinimum == y.mMinimum) && (x.mMaximum == y.mMaximum); }
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inline bool operator!=(const CARawPoint& x, const CARawPoint& y) { return !(x == y); }
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inline bool operator<=(const CARawPoint& x, const CARawPoint& y) { return (x < y) || (x == y); }
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inline bool operator>=(const CARawPoint& x, const CARawPoint& y) { return !(x < y); }
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inline bool operator>(const CARawPoint& x, const CARawPoint& y) { return !((x < y) || (x == y)); }
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struct CADBPoint
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{
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Float32 mMinimum;
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Float32 mMaximum;
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CADBPoint() : mMinimum(0), mMaximum(0) {}
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CADBPoint(const CADBPoint& inPoint) : mMinimum(inPoint.mMinimum), mMaximum(inPoint.mMaximum) {}
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CADBPoint(Float32 inMinimum, Float32 inMaximum) : mMinimum(inMinimum), mMaximum(inMaximum) {}
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CADBPoint& operator=(const CADBPoint& inPoint) { mMinimum = inPoint.mMinimum; mMaximum = inPoint.mMaximum; return *this; }
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static bool Overlap(const CADBPoint& x, const CADBPoint& y) { return (x.mMinimum < y.mMaximum) && (x.mMaximum >= y.mMinimum); }
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};
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inline bool operator<(const CADBPoint& x, const CADBPoint& y) { return x.mMinimum < y.mMinimum; }
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inline bool operator==(const CADBPoint& x, const CADBPoint& y) { return (x.mMinimum == y.mMinimum) && (x.mMaximum == y.mMaximum); }
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inline bool operator!=(const CADBPoint& x, const CADBPoint& y) { return !(x == y); }
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inline bool operator<=(const CADBPoint& x, const CADBPoint& y) { return (x < y) || (x == y); }
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inline bool operator>=(const CADBPoint& x, const CADBPoint& y) { return !(x < y); }
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inline bool operator>(const CADBPoint& x, const CADBPoint& y) { return !((x < y) || (x == y)); }
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//=============================================================================
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// CAVolumeCurve
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//=============================================================================
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class CAVolumeCurve
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{
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// Constants
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public:
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enum
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{
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kLinearCurve = 0,
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kPow1Over3Curve = 1,
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kPow1Over2Curve = 2,
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kPow3Over4Curve = 3,
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kPow3Over2Curve = 4,
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kPow2Over1Curve = 5,
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kPow3Over1Curve = 6,
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kPow4Over1Curve = 7,
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kPow5Over1Curve = 8,
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kPow6Over1Curve = 9,
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kPow7Over1Curve = 10,
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kPow8Over1Curve = 11,
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kPow9Over1Curve = 12,
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kPow10Over1Curve = 13,
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kPow11Over1Curve = 14,
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kPow12Over1Curve = 15
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};
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// Construction/Destruction
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public:
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CAVolumeCurve();
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virtual ~CAVolumeCurve();
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// Attributes
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public:
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UInt32 GetTag() const { return mTag; }
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void SetTag(UInt32 inTag) { mTag = inTag; }
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SInt32 GetMinimumRaw() const;
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SInt32 GetMaximumRaw() const;
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Float32 GetMinimumDB() const;
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Float32 GetMaximumDB() const;
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void SetIsApplyingTransferFunction(bool inIsApplyingTransferFunction) { mIsApplyingTransferFunction = inIsApplyingTransferFunction; }
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UInt32 GetTransferFunction() const { return mTransferFunction; }
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void SetTransferFunction(UInt32 inTransferFunction);
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// Operations
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public:
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void AddRange(SInt32 mMinRaw, SInt32 mMaxRaw, Float32 inMinDB, Float32 inMaxDB);
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void ResetRange();
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bool CheckForContinuity() const;
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SInt32 ConvertDBToRaw(Float32 inDB) const;
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Float32 ConvertRawToDB(SInt32 inRaw) const;
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Float32 ConvertRawToScalar(SInt32 inRaw) const;
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Float32 ConvertDBToScalar(Float32 inDB) const;
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SInt32 ConvertScalarToRaw(Float32 inScalar) const;
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Float32 ConvertScalarToDB(Float32 inScalar) const;
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// Implementation
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private:
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typedef std::map<CARawPoint, CADBPoint> CurveMap;
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UInt32 mTag;
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CurveMap mCurveMap;
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bool mIsApplyingTransferFunction;
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UInt32 mTransferFunction;
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Float32 mRawToScalarExponentNumerator;
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Float32 mRawToScalarExponentDenominator;
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};
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#endif
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