Jamoma API  0.6.0.a19
TTExponentialEaseInOutFunction.cpp
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1 /** @file
2  *
3  * @ingroup dspFunctionLib
4  *
5  * @brief #TTExponentialEaseInOutFunction Unit for Jamoms DSP
6  *
7  * @details Modeled after the piecewise exponential @n
8  * y = (1/2)2^(10(2x - 1)) ; [0,0.5) @n
9  * y = -(1/2)*2^(-10(2x - 1))) + 1 ; [0.5,1] @n
10  * @n
11  * Derived from Sam Hocevar's public domain C/C++ implementation of
12  * Robert Penner easing functions
13  *
14  * @authors Trond Lossius
15  *
16  * @copyright Copyright © 2014 by Trond Lossius @n
17  * This code is licensed under the terms of the "New BSD License" @n
18  * http://creativecommons.org/licenses/BSD/
19  */
20 
21 
23 
24 #define thisTTClass TTExponentialEaseInOutFunction
25 #define thisTTClassName "easeInOutExponential"
26 #define thisTTClassTags "dspFunctionLib, audio, processor, function"
27 
28 
29 TT_AUDIO_CONSTRUCTOR
30 {
31  setProcessMethod(processAudio);
32  setCalculateMethod(calculateValue);
33 }
34 
35 
36 TTExponentialEaseInOutFunction::~TTExponentialEaseInOutFunction()
37 {
38  ;
39 }
40 
41 
43 {
44  if (x == 0.0 || x == 1.0)
45  y = x;
46  else if(x < 0.5)
47  {
48  y = 0.5 * pow(2, (20 * x) - 10);
49  }
50  else
51  {
52  y = -0.5 * pow(2, (-20 * x) + 10) + 1;
53  }
54  return kTTErrNone;
55 }
56 
57 
59 {
60  TT_WRAP_CALCULATE_METHOD(calculateValue);
61 }
62 
#define setProcessMethod(methodName)
A convenience macro to be used by subclasses for setting the process method.
double TTFloat64
64 bit floating point number
Definition: TTBase.h:188
#define setCalculateMethod(methodName)
A convenience macro to be used by subclasses for setting the calculate method.
TTErr processAudio(TTAudioSignalArrayPtr inputs, TTAudioSignalArrayPtr outputs)
A standard audio processing method as used by TTBlue objects.
A simple container for an array of TTAudioSignal pointers.
long TTPtrSizedInt
An integer that is the same size as a pointer.
Definition: TTBase.h:240
TTErr
Jamoma Error Codes Enumeration of error codes that might be returned by any of the TTBlue functions a...
Definition: TTBase.h:342
No Error.
Definition: TTBase.h:343
TTErr calculateValue(const TTFloat64 &x, TTFloat64 &y, TTPtrSizedInt data)
y = f(x) for a single value
TTExponentialEaseInOutFunction Unit for Jamoms DSP