mirror of
https://github.com/nucular/sfxrlua.git
synced 2024-12-05 11:34:21 +00:00
Implemented resetting and randomizing
This commit is contained in:
nucular
parent
702398322e
commit
8127c6a9fa
122
sfxr.lua
122
sfxr.lua
@ -135,18 +135,41 @@ function sfxr.Sound:generate()
|
||||
-- Basically the main synthesizing function, yields the sample data
|
||||
|
||||
-- Initialize ALL the locals!
|
||||
local fperiod, maxperiod
|
||||
local slide, dslide
|
||||
local square_duty, square_slide
|
||||
local chg_mod, chg_time, chg_limit
|
||||
|
||||
local function reset()
|
||||
fperiod = 100 / ((self.frequency.start - 0.025)^2 + 0.001)
|
||||
maxperiod = 100 / (self.frequency.min^2 + 0.001)
|
||||
period = trunc(fperiod)
|
||||
|
||||
slide = 1.0 - self.frequency.slide^3 * 0.01
|
||||
dslide = -self.frequency.deltaSlide^3 * 0.000001
|
||||
|
||||
square_duty = 0.5 - self.duty.ratio * 0.5
|
||||
square_slide = -self.duty.sweep * 0.00005
|
||||
|
||||
chg_mod = 0
|
||||
if self.change.amount >= 0 then
|
||||
chg_mod = 1.0 - self.change.amount^2 * 0.9
|
||||
else
|
||||
chg_mod = 1.0 - self.change.amount^2 * 10
|
||||
end
|
||||
|
||||
chg_time = 0
|
||||
chg_limit = 0
|
||||
if self.change.speed == 1 then
|
||||
chg_limit = 0
|
||||
else
|
||||
chg_limit = (1 - self.change.speed)^2 * 20000 + 32
|
||||
end
|
||||
end
|
||||
reset()
|
||||
|
||||
local phase = 0
|
||||
|
||||
local fperiod = 100 / ((self.frequency.start - 0.025)^2 + 0.001)
|
||||
local maxperiod = 100 / (self.frequency.min^2 + 0.001)
|
||||
local period = trunc(fperiod)
|
||||
|
||||
local slide = 1.0 - self.frequency.slide^3 * 0.01
|
||||
local dslide = -self.frequency.deltaSlide^3 * 0.000001
|
||||
|
||||
local square_duty = 0.5 - self.duty.ratio * 0.5
|
||||
local square_slide = -self.duty.sweep * 0.00005
|
||||
|
||||
local env_vol = 0
|
||||
local env_stage = 1
|
||||
local env_time = 0
|
||||
@ -176,24 +199,22 @@ function sfxr.Sound:generate()
|
||||
local vib_speed = self.vibrato.speed^2 * 0.01
|
||||
local vib_amp = self.vibrato.depth * 0.5
|
||||
|
||||
local chg_time = 0
|
||||
local chg_limit = 0
|
||||
if self.change.speed == 1 then
|
||||
chg_limit = 0
|
||||
else
|
||||
chg_limit = (1 - self.change.speed)^2 * 20000 + 32
|
||||
end
|
||||
|
||||
local chg_mod = 0
|
||||
if self.change.amount >= 0 then
|
||||
chg_mod = 1.0 - self.change.amount^2 * 0.9
|
||||
else
|
||||
chg_mod = 1.0 - self.change.amount^2 * 10
|
||||
local rep_time = 0
|
||||
local rep_limit = trunc((1 - self.repeatSpeed)^2 * 20000 + 32)
|
||||
if self.repeatSpeed == 0 then
|
||||
rep_limit = 0
|
||||
end
|
||||
|
||||
-- Yay, the main closure
|
||||
|
||||
return function()
|
||||
-- Repeat maybe
|
||||
rep_time = rep_time + 1
|
||||
if rep_limit ~= 0 and rep_time >= rep_limit then
|
||||
reset()
|
||||
rep_time = 0
|
||||
end
|
||||
|
||||
-- Update the change time and apply it if needed
|
||||
chg_time = chg_time + 1
|
||||
if chg_limit ~= 0 and chg_time >= chg_limit then
|
||||
@ -206,7 +227,7 @@ function sfxr.Sound:generate()
|
||||
fperiod = fperiod * slide
|
||||
|
||||
if fperiod > maxperiod then
|
||||
fperiod = fmaxperiod
|
||||
fperiod = maxperiod
|
||||
-- If the frequency is too low, stop generating
|
||||
if (self.frequency.min > 0) then
|
||||
return nil
|
||||
@ -345,7 +366,7 @@ function sfxr.Sound:getEnvelopeLimit()
|
||||
self.envelope.sustain^2 * 100000,
|
||||
self.envelope.decay^2 * 100000}
|
||||
|
||||
return env_length[1] + env_length[2] + env_length[3] + 2
|
||||
return trunc(env_length[1] + env_length[2] + env_length[3] + 2)
|
||||
end
|
||||
|
||||
function sfxr.Sound:getLimit()
|
||||
@ -380,6 +401,57 @@ function sfxr.Sound:generateSoundData(freq, bits)
|
||||
return data
|
||||
end
|
||||
|
||||
function sfxr.Sound:randomize(seed)
|
||||
math.randomseed(seed)
|
||||
self.repeatSpeed = random(1, 2)
|
||||
|
||||
if maybe() then
|
||||
self.frequency.start = random(-1, 1)^3 + 0.5
|
||||
else
|
||||
self.frequency.start = random(-1, 1)^2
|
||||
end
|
||||
self.frequency.limit = 0
|
||||
self.frequency.slide = random(-1, 1)^5
|
||||
if self.frequency.start > 0.7 and self.frequency.slide > 0.2 then
|
||||
self.frequency.slide = -self.frequency.slide
|
||||
elseif self.frequency.start < 0.2 and self.frequency.slide <-0.05 then
|
||||
self.frequency.slide = -self.frequency.slide
|
||||
end
|
||||
self.frequency.deltaSlide = random(-1, 1)^3
|
||||
|
||||
self.duty.ratio = random(-1, 1)
|
||||
self.duty.sweep = random(-1, 1)^3
|
||||
|
||||
self.vibrato.depth = random(-1, 1)^3
|
||||
self.vibrato.speed = random(-1, 1)
|
||||
self.vibrato.delay = random(-1, 1)
|
||||
|
||||
self.envelope.attack = random(-1, 1)^3
|
||||
self.envelope.sustain = random(-1, 1)^2
|
||||
self.envelope.punch = random(-1, 1)^2
|
||||
self.envelope.decay = random(-1, 1)
|
||||
|
||||
if self.envelope.attack + self.envelope.sustain + self.envelope.decay < 0.2 then
|
||||
self.envelope.sustain = self.envelope.sustain + 0.2 + random(0, 0.3)
|
||||
self.envelope.decay = self.envelope.decay + 0.2 + random(0, 0.3)
|
||||
end
|
||||
|
||||
self.lowpass.resonance = random(-1, 1)
|
||||
self.lowpass.cutoff = 1 - random(0, 1)^3
|
||||
self.lowpass.sweep = random(-1, 1)^3
|
||||
if self.lowpass.cutoff < 0.1 and self.lowpass.sweep < -0.05 then
|
||||
self.lowpass.sweep = -self.lowpass.sweep
|
||||
end
|
||||
self.highpass.cutoff = random(0, 1)^3
|
||||
self.highpass.sweep = random(-1, 1)^5
|
||||
|
||||
self.phaser.offset = random(-1, 1)^3
|
||||
self.phaser.sweep = random(-1, 1)^3
|
||||
|
||||
self.change.speed = random(-1, 1)
|
||||
self.change.amount = random(-1, 1)
|
||||
end
|
||||
|
||||
-- Constructor
|
||||
|
||||
function sfxr.newSound(...)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user