30 |
* This is a triangle Low Frequency Oscillator which uses pure integer |
* This is a triangle Low Frequency Oscillator which uses pure integer |
31 |
* math (without branches) to synthesize the triangular wave. |
* math (without branches) to synthesize the triangular wave. |
32 |
*/ |
*/ |
33 |
template<range_type_t RANGE> |
template<LFO::range_type_t RANGE> |
34 |
class LFOTriangleIntMath : public LFOBase<RANGE> { |
class LFOTriangleIntMath : public LFOBase<RANGE> { |
35 |
public: |
public: |
36 |
|
|
51 |
const int signshifts = (sizeof(int) * 8) - 1; |
const int signshifts = (sizeof(int) * 8) - 1; |
52 |
iLevel += c; |
iLevel += c; |
53 |
const int iSign = (iLevel >> signshifts) | 1; |
const int iSign = (iLevel >> signshifts) | 1; |
54 |
if (RANGE == range_unsigned) |
if (RANGE == LFO::range_unsigned) |
55 |
return normalizer * (float) (iSign * iLevel); |
return normalizer * (float) (iSign * iLevel); |
56 |
else /* signed range */ |
else /* signed range */ |
57 |
return normalizer * (float) (iSign * iLevel) + offset; |
return normalizer * (float) (iSign * iLevel) + offset; |
67 |
|
|
68 |
const unsigned int intLimit = (unsigned int) -1; // all 0xFFFF... |
const unsigned int intLimit = (unsigned int) -1; // all 0xFFFF... |
69 |
const float max = (this->InternalDepth + ExtControlValue * this->ExtControlDepthCoeff) * this->ScriptDepthFactor; |
const float max = (this->InternalDepth + ExtControlValue * this->ExtControlDepthCoeff) * this->ScriptDepthFactor; |
70 |
if (RANGE == range_unsigned) { |
if (RANGE == LFO::range_unsigned) { |
71 |
normalizer = max / (float) intLimit; |
normalizer = max / (float) intLimit; |
72 |
} else { // signed range |
} else { // signed range |
73 |
normalizer = max / (float) intLimit * 4.0f; |
normalizer = max / (float) intLimit * 4.0f; |
89 |
* @param SampleRate - current sample rate of the engines |
* @param SampleRate - current sample rate of the engines |
90 |
* audio output signal |
* audio output signal |
91 |
*/ |
*/ |
92 |
void trigger(float Frequency, start_level_t StartLevel, uint16_t InternalDepth, uint16_t ExtControlDepth, bool FlipPhase, unsigned int SampleRate) { |
void trigger(float Frequency, LFO::start_level_t StartLevel, uint16_t InternalDepth, uint16_t ExtControlDepth, bool FlipPhase, unsigned int SampleRate) { |
93 |
this->Frequency = Frequency; |
this->Frequency = Frequency; |
94 |
this->InternalDepth = (InternalDepth / 1200.0f) * this->Max; |
this->InternalDepth = (InternalDepth / 1200.0f) * this->Max; |
95 |
this->ExtControlDepthCoeff = (((float) ExtControlDepth / 1200.0f) / 127.0f) * this->Max; |
this->ExtControlDepthCoeff = (((float) ExtControlDepth / 1200.0f) / 127.0f) * this->Max; |
96 |
this->ScriptFrequencyFactor = this->ScriptDepthFactor = 1.f; // reset for new voice |
this->ScriptFrequencyFactor = this->ScriptDepthFactor = 1.f; // reset for new voice |
97 |
if (RANGE == range_unsigned) { |
if (RANGE == LFO::range_unsigned) { |
98 |
this->InternalDepth *= 2.0f; |
this->InternalDepth *= 2.0f; |
99 |
this->ExtControlDepthCoeff *= 2.0f; |
this->ExtControlDepthCoeff *= 2.0f; |
100 |
} |
} |
107 |
c = (int) (intLimit * r); |
c = (int) (intLimit * r); |
108 |
|
|
109 |
switch (StartLevel) { |
switch (StartLevel) { |
110 |
case start_level_max: |
case LFO::start_level_max: |
111 |
iLevel = (FlipPhase) ? 0 : intLimit >> 1; |
iLevel = (FlipPhase) ? 0 : intLimit >> 1; |
112 |
break; |
break; |
113 |
case start_level_mid: |
case LFO::start_level_mid: |
114 |
iLevel = (FlipPhase) ? intLimit / 4 * 3 : intLimit >> 2; |
iLevel = (FlipPhase) ? intLimit / 4 * 3 : intLimit >> 2; |
115 |
break; |
break; |
116 |
case start_level_min: |
case LFO::start_level_min: |
117 |
iLevel = (FlipPhase) ? intLimit >> 1 : 0; |
iLevel = (FlipPhase) ? intLimit >> 1 : 0; |
118 |
break; |
break; |
119 |
} |
} |