diff options
Diffstat (limited to 'distrho/src/CoreAudio106/PublicUtility/CAVolumeCurve.h')
| -rwxr-xr-x | distrho/src/CoreAudio106/PublicUtility/CAVolumeCurve.h | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/distrho/src/CoreAudio106/PublicUtility/CAVolumeCurve.h b/distrho/src/CoreAudio106/PublicUtility/CAVolumeCurve.h new file mode 100755 index 00000000..53b903ec --- /dev/null +++ b/distrho/src/CoreAudio106/PublicUtility/CAVolumeCurve.h @@ -0,0 +1,172 @@ +/* Copyright © 2007 Apple Inc. All Rights Reserved. + + 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. +*/ +#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 +{ + Float64 mMinimum; + Float64 mMaximum; + + CADBPoint() : mMinimum(0), mMaximum(0) {} + CADBPoint(const CADBPoint& inPoint) : mMinimum(inPoint.mMinimum), mMaximum(inPoint.mMaximum) {} + CADBPoint(Float64 inMinimum, Float64 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; + Float64 GetMinimumDB() const; + Float64 GetMaximumDB() const; + + void SetIsApplyingTransferFunction(bool inIsApplyingTransferFunction) { mIsApplyingTransferFunction = inIsApplyingTransferFunction; } + int GetTransferFunction() const { return mTransferFunction; } + void SetTransferFunction(int inTransferFunction); + +// Operations +public: + void AddRange(SInt32 mMinRaw, SInt32 mMaxRaw, Float64 inMinDB, Float64 inMaxDB); + void ResetRange(); + bool CheckForContinuity() const; + + SInt32 ConvertDBToRaw(Float64 inDB) const; + Float64 ConvertRawToDB(SInt32 inRaw) const; + Float64 ConvertRawToScalar(SInt32 inRaw) const; + Float64 ConvertDBToScalar(Float64 inDB) const; + SInt32 ConvertScalarToRaw(Float64 inScalar) const; + Float64 ConvertScalarToDB(Float64 inScalar) const; + +// Implementation +private: + typedef std::map<CARawPoint, CADBPoint> CurveMap; + + UInt32 mTag; + CurveMap mCurveMap; + bool mIsApplyingTransferFunction; + UInt32 mTransferFunction; + Float64 mRawToScalarExponentNumerator; + Float64 mRawToScalarExponentDenominator; + +}; + +#endif |