32 |
} |
} |
33 |
|
|
34 |
void EGADSR::CalculateFadeOutCoeff(float FadeOutTime, float SampleRate) { |
void EGADSR::CalculateFadeOutCoeff(float FadeOutTime, float SampleRate) { |
35 |
const float killSteps = FadeOutTime * SampleRate; |
const float killSteps = FadeOutTime * SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE; |
36 |
FadeOutCoeff = -1.0f / killSteps; |
FadeOutCoeff = -1.0f / killSteps; |
37 |
} |
} |
38 |
|
|
39 |
void EGADSR::update(event_t Event, double SamplePos, float CurrentPitch, uint SampleRate) { |
void EGADSR::update(event_t Event, uint SampleRate) { |
40 |
|
if (Event == event_hold_end) HoldAttack = false; |
41 |
|
|
42 |
switch (Stage) { |
switch (Stage) { |
43 |
case stage_attack: |
case stage_attack: |
44 |
if (StepsLeft) { |
switch (Event) { |
45 |
PostponedEvent = Event; |
case event_release: |
|
} else { |
|
|
if (Event == event_release) |
|
|
enterReleasePart1Stage(); |
|
|
else if (Event == event_cancel_release) |
|
|
enterSustainStage(); |
|
|
else if (PostponedEvent == event_release) |
|
46 |
enterReleasePart1Stage(); |
enterReleasePart1Stage(); |
47 |
else if (PostponedEvent == event_cancel_release) |
break; |
48 |
|
case event_cancel_release: |
49 |
enterSustainStage(); |
enterSustainStage(); |
50 |
else if (HoldAttack) |
break; |
51 |
enterAttackHoldStage(SamplePos, CurrentPitch); |
case event_stage_end: |
52 |
else |
if (HoldAttack) |
53 |
enterDecay1Part1Stage(SampleRate); |
enterAttackHoldStage(); |
54 |
|
else |
55 |
|
enterDecay1Part1Stage(SampleRate); |
56 |
|
break; |
57 |
} |
} |
58 |
break; |
break; |
59 |
case stage_attack_hold: |
case stage_attack_hold: |
60 |
switch (Event) { |
switch (Event) { |
61 |
case event_stage_end: |
case event_stage_end: {// just refresh time |
62 |
|
const int intMax = (unsigned int) -1 >> 1; |
63 |
|
StepsLeft = intMax; // we use the highest possible value |
64 |
|
break; |
65 |
|
} |
66 |
|
case event_hold_end: |
67 |
enterDecay1Part1Stage(SampleRate); |
enterDecay1Part1Stage(SampleRate); |
68 |
break; |
break; |
69 |
case event_release: |
case event_release: |
79 |
break; |
break; |
80 |
case stage_decay1_part1: |
case stage_decay1_part1: |
81 |
switch (Event) { |
switch (Event) { |
82 |
case stage_end: |
case event_stage_end: |
83 |
enterDecay1Part2Stage(); |
enterDecay1Part2Stage(SampleRate); |
84 |
break; |
break; |
85 |
case event_release: |
case event_release: |
86 |
enterReleasePart1Stage(); |
enterReleasePart1Stage(); |
100 |
break; |
break; |
101 |
case event_stage_end: // fall through |
case event_stage_end: // fall through |
102 |
case event_cancel_release: |
case event_cancel_release: |
103 |
if (InfiniteSustain) |
if (Level < CONFIG_EG_BOTTOM) |
104 |
|
enterEndStage(); |
105 |
|
else if (InfiniteSustain) |
106 |
enterSustainStage(); |
enterSustainStage(); |
107 |
else |
else |
108 |
enterDecay2Stage(SampleRate); |
enterDecay2Stage(SampleRate); |
117 |
case event_release: |
case event_release: |
118 |
enterReleasePart1Stage(); |
enterReleasePart1Stage(); |
119 |
break; |
break; |
120 |
|
case event_hold_end: |
121 |
|
enterDecay1Part1Stage(SampleRate); |
122 |
|
break; |
123 |
} |
} |
124 |
break; |
break; |
125 |
case stage_sustain: |
case stage_sustain: |
132 |
case event_release: |
case event_release: |
133 |
enterReleasePart1Stage(); |
enterReleasePart1Stage(); |
134 |
break; |
break; |
135 |
|
case event_hold_end: |
136 |
|
enterDecay1Part1Stage(SampleRate); |
137 |
|
break; |
138 |
} |
} |
139 |
break; |
break; |
140 |
case stage_release_part1: |
case stage_release_part1: |
173 |
} |
} |
174 |
} |
} |
175 |
|
|
176 |
void EGADSR::trigger(uint PreAttack, float AttackTime, bool HoldAttack, long LoopStart, float Decay1Time, double Decay2Time, bool InfiniteSustain, uint SustainLevel, float ReleaseTime, float Volume, uint SampleRate) { |
void EGADSR::trigger(uint PreAttack, float AttackTime, bool HoldAttack, float Decay1Time, double Decay2Time, bool InfiniteSustain, uint SustainLevel, float ReleaseTime, float Volume, uint SampleRate) { |
177 |
|
this->SustainLevel = SustainLevel / 1000.0; |
|
enterAttackStage(PreAttack, AttackTime, SampleRate, 0.0, 1.0f); |
|
|
|
|
|
if (SustainLevel) { |
|
|
this->SustainLevel = SustainLevel / 1000.0; |
|
|
} else { |
|
|
// sustain level 0 means that voice dies after decay 1 |
|
|
this->SustainLevel = CONFIG_EG_BOTTOM; |
|
|
InfiniteSustain = false; |
|
|
Decay2Time = CONFIG_EG_MIN_RELEASE_TIME; |
|
|
} |
|
178 |
this->InfiniteSustain = InfiniteSustain; |
this->InfiniteSustain = InfiniteSustain; |
179 |
this->HoldAttack = HoldAttack; |
this->HoldAttack = HoldAttack; |
|
this->LoopStart = LoopStart; |
|
180 |
|
|
181 |
this->Decay1Time = Decay1Time; |
this->Decay1Time = Decay1Time; |
182 |
this->Decay2Time = Decay2Time; |
this->Decay2Time = Decay2Time; |
193 |
ReleaseCoeff2 = exp(ReleaseSlope); |
ReleaseCoeff2 = exp(ReleaseSlope); |
194 |
ReleaseCoeff3 = ExpOffset * (1 - ReleaseCoeff2); |
ReleaseCoeff3 = ExpOffset * (1 - ReleaseCoeff2); |
195 |
ReleaseLevel2 = 0.25 * invVolume; |
ReleaseLevel2 = 0.25 * invVolume; |
196 |
|
|
197 |
|
enterAttackStage(PreAttack, AttackTime, SampleRate); |
198 |
} |
} |
199 |
|
|
200 |
void EGADSR::enterAttackStage(const uint PreAttack, const float AttackTime, const uint SampleRate, const double SamplePos, const float CurrentPitch) { |
void EGADSR::enterAttackStage(const uint PreAttack, const float AttackTime, const uint SampleRate) { |
201 |
Stage = stage_attack; |
Stage = stage_attack; |
202 |
Segment = segment_lin; |
Segment = segment_lin; |
203 |
// Measurements of GSt output shows that the real attack time |
|
204 |
// is about 65.5% of the value specified in the gig file. |
if (AttackTime >= 0.0005f) { |
205 |
StepsLeft = (int) (0.655f * AttackTime * SampleRate); |
// Measurements of GSt output shows that the real attack time |
206 |
if (StepsLeft) { |
// is about 65.5% of the value specified in the gig file. |
207 |
|
// The minimum attack value used is 0.032. |
208 |
|
StepsLeft = int(0.655f * RTMath::Max(AttackTime, 0.032f) * SampleRate); |
209 |
Level = (float) PreAttack / 1000.0; |
Level = (float) PreAttack / 1000.0; |
210 |
Coeff = 0.896f * (1.0f - Level) / StepsLeft; // max level is a bit lower if attack != 0 |
Coeff = 0.896f * (1.0f - Level) / StepsLeft; // max level is a bit lower if attack != 0 |
211 |
} else { // immediately jump to the next stage |
} else { // attack is zero - immediately jump to the next stage |
212 |
if (HoldAttack) enterAttackHoldStage(SamplePos, CurrentPitch); |
Level = 1.029f; // a bit higher than max sustain |
213 |
|
if (HoldAttack) enterAttackHoldStage(); |
214 |
else enterDecay1Part1Stage(SampleRate); |
else enterDecay1Part1Stage(SampleRate); |
215 |
} |
} |
|
PostponedEvent = (event_t) -1; // init with anything except release or cancel_release |
|
216 |
} |
} |
217 |
|
|
218 |
void EGADSR::enterAttackHoldStage(const double SamplePos, const float CurrentPitch) { |
void EGADSR::enterAttackHoldStage() { |
219 |
Stage = stage_attack_hold; |
Stage = stage_attack_hold; |
220 |
Segment = segment_lin; |
Segment = segment_lin; |
221 |
Coeff = 0.0f; // don't rise anymore |
Coeff = 0.0f; // don't rise anymore |
222 |
StepsLeft = (int) (LoopStart - SamplePos / CurrentPitch); // FIXME: just an approximation, inaccuracy grows with higher audio fragment size, sufficient for usual fragment sizes though |
const int intMax = (unsigned int) -1 >> 1; |
223 |
|
StepsLeft = intMax; // we use the highest value possible (we refresh StepsLeft in update() in case) |
224 |
} |
} |
225 |
|
|
226 |
void EGADSR::enterDecay1Part1Stage(const uint SampleRate) { |
void EGADSR::enterDecay1Part1Stage(const uint SampleRate) { |
234 |
// (where d is 1/SampleRate). The transition from f to g is |
// (where d is 1/SampleRate). The transition from f to g is |
235 |
// done when f(x) has reached Level2 = 25% of full volume. |
// done when f(x) has reached Level2 = 25% of full volume. |
236 |
StepsLeft = (int) (Decay1Time * SampleRate); |
StepsLeft = (int) (Decay1Time * SampleRate); |
237 |
if (StepsLeft && SustainLevel < 1.0) { |
if (StepsLeft && Level > SustainLevel) { |
238 |
Stage = stage_decay1_part1; |
Stage = stage_decay1_part1; |
239 |
Segment = segment_lin; |
Segment = segment_lin; |
240 |
Decay1Slope = 1.365 * (SustainLevel - 1.0) / StepsLeft; |
Decay1Slope = (1.347f * SustainLevel - 1.361f) / StepsLeft; |
241 |
Coeff = Decay1Slope * invVolume; |
Coeff = Decay1Slope * invVolume; |
242 |
Decay1Level2 = 0.25 * invVolume; |
Decay1Level2 = 0.25 * invVolume; |
243 |
StepsLeft = int((RTMath::Max(Decay1Level2, SustainLevel) - Level) / Coeff); |
StepsLeft = int((RTMath::Max(Decay1Level2, SustainLevel) - Level) / Coeff); |
244 |
|
if (StepsLeft <= 0) enterDecay1Part2Stage(SampleRate); |
245 |
} else { |
} else { |
|
Level = SustainLevel; |
|
246 |
if (InfiniteSustain) enterSustainStage(); |
if (InfiniteSustain) enterSustainStage(); |
247 |
else enterDecay2Stage(SampleRate); |
else enterDecay2Stage(SampleRate); |
248 |
} |
} |
249 |
} |
} |
250 |
|
|
251 |
void EGADSR::enterDecay1Part2Stage() { |
void EGADSR::enterDecay1Part2Stage(const uint SampleRate) { |
252 |
Stage = stage_decay1_part2; |
if (SustainLevel < Decay1Level2) { |
253 |
Segment = segment_exp; |
Stage = stage_decay1_part2; |
254 |
Decay1Slope *= 3.55; |
Segment = segment_exp; |
255 |
Coeff = exp(Decay1Slope); |
Decay1Slope *= 3.55; |
256 |
Offset = ExpOffset * (1 - Coeff); |
Coeff = exp(Decay1Slope); |
257 |
Level = Decay1Level2; |
Offset = ExpOffset * (1 - Coeff); |
258 |
StepsLeft = int(log((SustainLevel - ExpOffset) / (Level - ExpOffset)) / Decay1Slope); |
StepsLeft = int(log((SustainLevel - ExpOffset) / (Level - ExpOffset)) / Decay1Slope); |
259 |
|
if (StepsLeft > 0) return; |
260 |
|
} |
261 |
|
if (InfiniteSustain) enterSustainStage(); |
262 |
|
else enterDecay2Stage(SampleRate); |
263 |
} |
} |
264 |
|
|
265 |
void EGADSR::enterDecay2Stage(const uint SampleRate) { |
void EGADSR::enterDecay2Stage(const uint SampleRate) { |
266 |
Stage = stage_decay2; |
Stage = stage_decay2; |
267 |
Segment = segment_lin; |
Segment = segment_lin; |
268 |
Decay2Time = RTMath::Max(Decay2Time, CONFIG_EG_MIN_RELEASE_TIME); |
Decay2Time = RTMath::Max(Decay2Time, 0.05f); |
269 |
StepsLeft = (int) (Decay2Time * SampleRate); |
StepsLeft = (int) (Decay2Time * SampleRate); |
270 |
Coeff = (-1.03 / StepsLeft) * invVolume; |
Coeff = (-1.03 / StepsLeft) * invVolume; |
271 |
//FIXME: do we really have to calculate 'StepsLeft' two times? |
//FIXME: do we really have to calculate 'StepsLeft' two times? |
272 |
StepsLeft = int((CONFIG_EG_BOTTOM - Level) / Coeff); |
StepsLeft = int((CONFIG_EG_BOTTOM - Level) / Coeff); |
273 |
|
if (StepsLeft <= 0) enterEndStage(); |
274 |
} |
} |
275 |
|
|
276 |
void EGADSR::enterSustainStage() { |
void EGADSR::enterSustainStage() { |
286 |
Segment = segment_lin; |
Segment = segment_lin; |
287 |
StepsLeft = int((ReleaseLevel2 - Level) / ReleaseCoeff); |
StepsLeft = int((ReleaseLevel2 - Level) / ReleaseCoeff); |
288 |
Coeff = ReleaseCoeff; |
Coeff = ReleaseCoeff; |
289 |
|
if (StepsLeft <= 0) enterReleasePart2Stage(); |
290 |
} |
} |
291 |
|
|
292 |
void EGADSR::enterReleasePart2Stage() { |
void EGADSR::enterReleasePart2Stage() { |
295 |
StepsLeft = int(log((CONFIG_EG_BOTTOM - ExpOffset) / (Level - ExpOffset)) / ReleaseSlope); |
StepsLeft = int(log((CONFIG_EG_BOTTOM - ExpOffset) / (Level - ExpOffset)) / ReleaseSlope); |
296 |
Coeff = ReleaseCoeff2; |
Coeff = ReleaseCoeff2; |
297 |
Offset = ReleaseCoeff3; |
Offset = ReleaseCoeff3; |
298 |
|
if (StepsLeft <= 0) enterFadeOutStage(); |
299 |
} |
} |
300 |
|
|
301 |
void EGADSR::enterFadeOutStage() { |
void EGADSR::enterFadeOutStage() { |
303 |
Segment = segment_lin; |
Segment = segment_lin; |
304 |
StepsLeft = int(Level / (-FadeOutCoeff)); |
StepsLeft = int(Level / (-FadeOutCoeff)); |
305 |
Coeff = FadeOutCoeff; |
Coeff = FadeOutCoeff; |
306 |
|
if (StepsLeft <= 0) enterEndStage(); |
307 |
} |
} |
308 |
|
|
309 |
void EGADSR::enterEndStage() { |
void EGADSR::enterEndStage() { |
310 |
Stage = stage_end; |
Stage = stage_end; |
311 |
Segment = segment_end; |
Segment = segment_end; |
312 |
|
Level = 0; |
313 |
} |
} |
314 |
|
|
315 |
}} // namespace LinuxSampler::gig |
}} // namespace LinuxSampler::gig |