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reverted parameter struct

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This commit is contained in:
Chris
2023-08-03 08:57:36 +02:00
parent ffb32bc47e
commit acab32bb43
1 changed files with 35 additions and 38 deletions
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73
synth/tx_envelope.h
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@@ -15,7 +15,9 @@ enum env_state {
release2 release2
}; };
struct env_params { class tx_envelope {
public:
env_state state;
float attack1_rate; float attack1_rate;
float attack1_level; float attack1_level;
float attack2_rate; float attack2_rate;
@@ -27,12 +29,6 @@ struct env_params {
float release1_rate; float release1_rate;
float release1_level; float release1_level;
float release2_rate; float release2_rate;
};
template <typename t_sample>
class tx_envelope {
public:
env_state state;
tx_envelope(bool _retrigger = false) tx_envelope(bool _retrigger = false)
: samplerate { 44100. } : samplerate { 44100. }
@@ -47,20 +43,21 @@ public:
{ {
} }
float process_sample(bool gate, bool trigger, env_params& _params) { float process_sample(bool gate, bool trigger) {
return process_sample(gate, trigger, _params, 0, 0); return process_sample<float>(gate, trigger, 0, 0);
} }
float process_sample(bool gate, bool trigger, env_params& _params, t_sample _attack_mod, t_sample _decay_mod) { template <typename t_sample>
float process_sample(bool gate, bool trigger, t_sample _attack_mod, t_sample _decay_mod) {
size_t attack_mid_x1 = ms_to_samples(_params.attack1_rate + (float)_attack_mod); size_t attack_mid_x1 = ms_to_samples(attack1_rate + (float)_attack_mod);
size_t attack_mid_x2 = ms_to_samples(_params.attack2_rate + (float)_attack_mod); size_t attack_mid_x2 = ms_to_samples(attack2_rate + (float)_attack_mod);
size_t hold_samp = ms_to_samples(_params.hold_rate); size_t hold_samp = ms_to_samples(hold_rate);
size_t decay_mid_x1 = ms_to_samples(_params.decay1_rate + (float)_decay_mod); size_t decay_mid_x1 = ms_to_samples(decay1_rate + (float)_decay_mod);
size_t decay_mid_x2 = ms_to_samples(_params.decay2_rate + (float)_decay_mod); size_t decay_mid_x2 = ms_to_samples(decay2_rate + (float)_decay_mod);
size_t release_mid_x1 = ms_to_samples(_params.release1_rate + (float)_decay_mod); size_t release_mid_x1 = ms_to_samples(release1_rate + (float)_decay_mod);
size_t release_mid_x2 = ms_to_samples(_params.release2_rate + (float)_decay_mod); size_t release_mid_x2 = ms_to_samples(release2_rate + (float)_decay_mod);
// if note on is triggered, transition to attack phase // if note on is triggered, transition to attack phase
if (trigger) { if (trigger) {
@@ -75,7 +72,7 @@ public:
if (state == attack1) { if (state == attack1) {
// while in attack phase // while in attack phase
if (phase < attack_mid_x1) { if (phase < attack_mid_x1) {
level = lerp(0, start_level, (float)attack_mid_x1, _params.attack1_level, (float)phase); level = lerp(0, start_level, (float)attack_mid_x1, attack1_level, (float)phase);
phase += 1; phase += 1;
} }
// reset phase if parameter was changed // reset phase if parameter was changed
@@ -92,7 +89,7 @@ public:
if (state == attack2) { if (state == attack2) {
// while in attack phase // while in attack phase
if (phase < attack_mid_x2) { if (phase < attack_mid_x2) {
level = lerp(0, _params.attack1_level, (float)attack_mid_x2, 1, (float)phase); level = lerp(0, attack1_level, (float)attack_mid_x2, 1, (float)phase);
phase += 1; phase += 1;
} }
// reset phase if parameter was changed // reset phase if parameter was changed
@@ -123,7 +120,7 @@ public:
if (state == decay1) { if (state == decay1) {
// while in decay phase // while in decay phase
if (phase < decay_mid_x1) { if (phase < decay_mid_x1) {
level = lerp(0, 1, (float)decay_mid_x1, _params.decay1_level, (float)phase); level = lerp(0, 1, (float)decay_mid_x1, decay1_level, (float)phase);
phase += 1; phase += 1;
} }
// reset phase if parameter was changed // reset phase if parameter was changed
@@ -140,7 +137,7 @@ public:
if (state == decay2) { if (state == decay2) {
// while in decay phase // while in decay phase
if (phase < decay_mid_x2) { if (phase < decay_mid_x2) {
level = lerp(0, _params.decay1_level, (float)decay_mid_x2, _params.sustain_level, (float)phase); level = lerp(0, decay1_level, (float)decay_mid_x2, sustain_level, (float)phase);
phase += 1; phase += 1;
} }
// reset phase if parameter was changed // reset phase if parameter was changed
@@ -151,19 +148,19 @@ public:
if (phase == decay_mid_x2) { if (phase == decay_mid_x2) {
state = sustain; state = sustain;
phase = 0; phase = 0;
level = _params.sustain_level; level = sustain_level;
} }
} }
// while sustain phase: if note off is triggered, transition to release phase // while sustain phase: if note off is triggered, transition to release phase
if (state == sustain && !gate) { if (state == sustain && !gate) {
state = release1; state = release1;
level = _params.sustain_level; level = sustain_level;
} }
// release 1st half // release 1st half
if (state == release1) { if (state == release1) {
// while in release phase // while in release phase
if (phase < release_mid_x1) { if (phase < release_mid_x1) {
level = lerp(0, _params.sustain_level, (float)release_mid_x1, _params.release1_level, (float)phase); level = lerp(0, sustain_level, (float)release_mid_x1, release1_level, (float)phase);
phase += 1; phase += 1;
} }
// reset phase if parameter was changed // reset phase if parameter was changed
@@ -180,7 +177,7 @@ public:
if (state == release2) { if (state == release2) {
// while in release phase // while in release phase
if (phase < release_mid_x2) { if (phase < release_mid_x2) {
level = lerp(0, _params.release1_level, (float)release_mid_x2, 0, (float)phase); level = lerp(0, release1_level, (float)release_mid_x2, 0, (float)phase);
phase += 1; phase += 1;
} }
// reset phase if parameter was changed // reset phase if parameter was changed
@@ -205,7 +202,7 @@ public:
} }
// converts the x/y coordinates of the envelope points as a list for graphical representation. // converts the x/y coordinates of the envelope points as a list for graphical representation.
std::array<float, 18> calc_coordinates(env_params _params, float _max_attack, float _max_decay, float _max_release) { std::array<float, 18> calc_coordinates(float _max_attack, float _max_decay, float _max_release) {
auto scale = [](float _value, float _max) { auto scale = [](float _value, float _max) {
return powf(_value / _max, 0.25) * _max; return powf(_value / _max, 0.25) * _max;
@@ -214,28 +211,28 @@ public:
float a_x = 0; float a_x = 0;
float a_y = 0; float a_y = 0;
float b_x = scale(_params.attack1_rate, _max_attack / 2); float b_x = scale(attack1_rate, _max_attack / 2);
float b_y = _params.attack1_level; float b_y = attack1_level;
float c_x = b_x + scale(_params.attack2_rate, _max_attack / 2); float c_x = b_x + scale(attack2_rate, _max_attack / 2);
float c_y = 1; float c_y = 1;
float d_x = c_x + _params.hold_rate; float d_x = c_x + hold_rate;
float d_y = 1; float d_y = 1;
float e_x = d_x + scale(_params.decay1_rate, _max_decay / 2); float e_x = d_x + scale(decay1_rate, _max_decay / 2);
float e_y = _params.decay1_level; float e_y = decay1_level;
float f_x = e_x + scale(_params.decay2_rate, _max_decay / 2); float f_x = e_x + scale(decay2_rate, _max_decay / 2);
float f_y = _params.sustain_level; float f_y = sustain_level;
float g_x = _max_attack + _max_decay; float g_x = _max_attack + _max_decay;
float g_y = _params.sustain_level; float g_y = sustain_level;
float h_x = g_x + scale(_params.release1_rate, _max_decay / 2); float h_x = g_x + scale(release1_rate, _max_decay / 2);
float h_y = _params.release1_level; float h_y = release1_level;
float i_x = h_x + scale(_params.release2_rate, _max_decay / 2); float i_x = h_x + scale(release2_rate, _max_decay / 2);
float i_y = 0; float i_y = 0;
float total = _max_attack + _max_decay + _max_release; float total = _max_attack + _max_decay + _max_release;