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sfxr.js
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sfxr.js
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//
//
// https://github.com/increpare/PuzzleScript/tree/master/src/js/sfxr.js
//
//
var SOUND_VOL = 0.25;
var SAMPLE_RATE = 5512;
var BIT_DEPTH = 8;
var SQUARE = 0;
var SAWTOOTH = 1;
var SINE = 2;
var NOISE = 3;
var TRIANGLE = 4;
var BREAKER = 5;
var SHAPES = [
'square', 'sawtooth', 'sine', 'noise', 'triangle', 'breaker'
];
var AUDIO_CONTEXT;
function checkAudioContextExists(){
try{
if (AUDIO_CONTEXT==null){
if (typeof AudioContext != 'undefined') {
AUDIO_CONTEXT = new AudioContext();
} else if (typeof webkitAudioContext != 'undefined') {
AUDIO_CONTEXT = new webkitAudioContext();
}
}
}
catch (ex){
window.console.log(ex)
}
}
checkAudioContextExists();
// Playback volume
var masterVolume = 1.0;
// Sound generation parameters are on [0,1] unless noted SIGNED, & thus [-1,1]
function Params() {
var result={};
// Wave shape
result.wave_type = SQUARE;
// Envelope
result.p_env_attack = 0.0; // Attack time
result.p_env_sustain = 0.3; // Sustain time
result.p_env_punch = 0.0; // Sustain punch
result.p_env_decay = 0.4; // Decay time
// Tone
result.p_base_freq = 0.3; // Start frequency
result.p_freq_limit = 0.0; // Min frequency cutoff
result.p_freq_ramp = 0.0; // Slide (SIGNED)
result.p_freq_dramp = 0.0; // Delta slide (SIGNED)
// Vibrato
result.p_vib_strength = 0.0; // Vibrato depth
result.p_vib_speed = 0.0; // Vibrato speed
// Tonal change
result.p_arp_mod = 0.0; // Change amount (SIGNED)
result.p_arp_speed = 0.0; // Change speed
// Duty (wat's that?)
result.p_duty = 0.0; // Square duty
result.p_duty_ramp = 0.0; // Duty sweep (SIGNED)
// Repeat
result.p_repeat_speed = 0.0; // Repeat speed
// Phaser
result.p_pha_offset = 0.0; // Phaser offset (SIGNED)
result.p_pha_ramp = 0.0; // Phaser sweep (SIGNED)
// Low-pass filter
result.p_lpf_freq = 1.0; // Low-pass filter cutoff
result.p_lpf_ramp = 0.0; // Low-pass filter cutoff sweep (SIGNED)
result.p_lpf_resonance = 0.0;// Low-pass filter resonance
// High-pass filter
result.p_hpf_freq = 0.0; // High-pass filter cutoff
result.p_hpf_ramp = 0.0; // High-pass filter cutoff sweep (SIGNED)
// Sample parameters
result.sound_vol = 0.5;
result.sample_rate = 44100;
result.bit_depth = 8;
return result;
}
var rng;
var seeded = false;
function frnd(range) {
if (seeded) {
return rng.uniform() * range;
} else {
return Math.random() * range;
}
}
function rnd(max) {
if (seeded) {
return Math.floor(rng.uniform() * (max + 1));
} else {
return Math.floor(Math.random() * (max + 1));
}
}
pickupCoin = function() {
var result=Params();
result.wave_type = Math.floor(frnd(SHAPES.length));
if (result.wave_type === 3) {
result.wave_type = 0;
}
result.p_base_freq = 0.4 + frnd(0.5);
result.p_env_attack = 0.0;
result.p_env_sustain = frnd(0.1);
result.p_env_decay = 0.1 + frnd(0.4);
result.p_env_punch = 0.3 + frnd(0.3);
if (rnd(1)) {
result.p_arp_speed = 0.5 + frnd(0.2);
var num = (frnd(7) | 1) + 1;
var den = num + (frnd(7) | 1) + 2;
result.p_arp_mod = (+num) / (+den); //0.2 + frnd(0.4);
}
return result;
};
laserShoot = function() {
var result=Params();
result.wave_type = rnd(2);
if (result.wave_type === SINE && rnd(1))
result.wave_type = rnd(1);
result.wave_type = Math.floor(frnd(SHAPES.length));
if (result.wave_type === 3) {
result.wave_type = SQUARE;
}
result.p_base_freq = 0.5 + frnd(0.5);
result.p_freq_limit = result.p_base_freq - 0.2 - frnd(0.6);
if (result.p_freq_limit < 0.2) result.p_freq_limit = 0.2;
result.p_freq_ramp = -0.15 - frnd(0.2);
if (rnd(2) === 0)
{
result.p_base_freq = 0.3 + frnd(0.6);
result.p_freq_limit = frnd(0.1);
result.p_freq_ramp = -0.35 - frnd(0.3);
}
if (rnd(1))
{
result.p_duty = frnd(0.5);
result.p_duty_ramp = frnd(0.2);
}
else
{
result.p_duty = 0.4 + frnd(0.5);
result.p_duty_ramp = -frnd(0.7);
}
result.p_env_attack = 0.0;
result.p_env_sustain = 0.1 + frnd(0.2);
result.p_env_decay = frnd(0.4);
if (rnd(1))
result.p_env_punch = frnd(0.3);
if (rnd(2) === 0)
{
result.p_pha_offset = frnd(0.2);
result.p_pha_ramp = -frnd(0.2);
}
if (rnd(1))
result.p_hpf_freq = frnd(0.3);
return result;
};
explosion = function() {
var result=Params();
if (rnd(1)) {
result.p_base_freq = 0.1 + frnd(0.4);
result.p_freq_ramp = -0.1 + frnd(0.4);
} else {
result.p_base_freq = 0.2 + frnd(0.7);
result.p_freq_ramp = -0.2 - frnd(0.2);
}
result.p_base_freq *= result.p_base_freq;
if (rnd(4) === 0)
result.p_freq_ramp = 0.0;
if (rnd(2) === 0)
result.p_repeat_speed = 0.3 + frnd(0.5);
result.p_env_attack = 0.0;
result.p_env_sustain = 0.1 + frnd(0.3);
result.p_env_decay = frnd(0.5);
if (rnd(1) === 0) {
result.p_pha_offset = -0.3 + frnd(0.9);
result.p_pha_ramp = -frnd(0.3);
}
result.p_env_punch = 0.2 + frnd(0.6);
if (rnd(1)) {
result.p_vib_strength = frnd(0.7);
result.p_vib_speed = frnd(0.6);
}
if (rnd(2) === 0) {
result.p_arp_speed = 0.6 + frnd(0.3);
result.p_arp_mod = 0.8 - frnd(1.6);
}
return result;
};
//9675111
birdSound = function() {
var result=Params();
if (frnd(10) < 1) {
result.wave_type = Math.floor(frnd(SHAPES.length));
if (result.wave_type === 3) {
result.wave_type = SQUARE;
}
result.p_env_attack = 0.4304400932967592 + frnd(0.2) - 0.1;
result.p_env_sustain = 0.15739346034252394 + frnd(0.2) - 0.1;
result.p_env_punch = 0.004488201744871758 + frnd(0.2) - 0.1;
result.p_env_decay = 0.07478075528212291 + frnd(0.2) - 0.1;
result.p_base_freq = 0.9865265720147687 + frnd(0.2) - 0.1;
result.p_freq_limit = 0 + frnd(0.2) - 0.1;
result.p_freq_ramp = -0.2995018224359539 + frnd(0.2) - 0.1;
if (frnd(1.0) < 0.5) {
result.p_freq_ramp = 0.1 + frnd(0.15);
}
result.p_freq_dramp = 0.004598608156964473 + frnd(0.1) - 0.05;
result.p_vib_strength = -0.2202799497929496 + frnd(0.2) - 0.1;
result.p_vib_speed = 0.8084998703158364 + frnd(0.2) - 0.1;
result.p_arp_mod = 0;//-0.46410459213693644+frnd(0.2)-0.1;
result.p_arp_speed = 0;//-0.10955361249587248+frnd(0.2)-0.1;
result.p_duty = -0.9031808754347107 + frnd(0.2) - 0.1;
result.p_duty_ramp = -0.8128699999808343 + frnd(0.2) - 0.1;
result.p_repeat_speed = 0.6014860189319991 + frnd(0.2) - 0.1;
result.p_pha_offset = -0.9424902314367765 + frnd(0.2) - 0.1;
result.p_pha_ramp = -0.1055482222272056 + frnd(0.2) - 0.1;
result.p_lpf_freq = 0.9989765717851521 + frnd(0.2) - 0.1;
result.p_lpf_ramp = -0.25051720626043017 + frnd(0.2) - 0.1;
result.p_lpf_resonance = 0.32777871505494693 + frnd(0.2) - 0.1;
result.p_hpf_freq = 0.0023548750981756753 + frnd(0.2) - 0.1;
result.p_hpf_ramp = -0.002375673204842568 + frnd(0.2) - 0.1;
return result;
}
if (frnd(10) < 1) {
result.wave_type = Math.floor(frnd(SHAPES.length));
if (result.wave_type === 3) {
result.wave_type = SQUARE;
}
result.p_env_attack = 0.5277795946672003 + frnd(0.2) - 0.1;
result.p_env_sustain = 0.18243733568468432 + frnd(0.2) - 0.1;
result.p_env_punch = -0.020159754546840117 + frnd(0.2) - 0.1;
result.p_env_decay = 0.1561353422051903 + frnd(0.2) - 0.1;
result.p_base_freq = 0.9028855606533718 + frnd(0.2) - 0.1;
result.p_freq_limit = -0.008842787837148716;
result.p_freq_ramp = -0.1;
result.p_freq_dramp = -0.012891241489551925;
result.p_vib_strength = -0.17923136138403065 + frnd(0.2) - 0.1;
result.p_vib_speed = 0.908263385610142 + frnd(0.2) - 0.1;
result.p_arp_mod = 0.41690153355414894 + frnd(0.2) - 0.1;
result.p_arp_speed = 0.0010766233195860703 + frnd(0.2) - 0.1;
result.p_duty = -0.8735363011184684 + frnd(0.2) - 0.1;
result.p_duty_ramp = -0.7397985366747507 + frnd(0.2) - 0.1;
result.p_repeat_speed = 0.0591789344172107 + frnd(0.2) - 0.1;
result.p_pha_offset = -0.9961184222777699 + frnd(0.2) - 0.1;
result.p_pha_ramp = -0.08234769395850523 + frnd(0.2) - 0.1;
result.p_lpf_freq = 0.9412475115697335 + frnd(0.2) - 0.1;
result.p_lpf_ramp = -0.18261358925834958 + frnd(0.2) - 0.1;
result.p_lpf_resonance = 0.24541438107389477 + frnd(0.2) - 0.1;
result.p_hpf_freq = -0.01831940280978611 + frnd(0.2) - 0.1;
result.p_hpf_ramp = -0.03857383633171346 + frnd(0.2) - 0.1;
return result;
}
if (frnd(10) < 1) {
//result.wave_type = 4;
result.wave_type = Math.floor(frnd(SHAPES.length));
if (result.wave_type === 3) {
result.wave_type = SQUARE;
}
result.p_env_attack = 0.4304400932967592 + frnd(0.2) - 0.1;
result.p_env_sustain = 0.15739346034252394 + frnd(0.2) - 0.1;
result.p_env_punch = 0.004488201744871758 + frnd(0.2) - 0.1;
result.p_env_decay = 0.07478075528212291 + frnd(0.2) - 0.1;
result.p_base_freq = 0.9865265720147687 + frnd(0.2) - 0.1;
result.p_freq_limit = 0 + frnd(0.2) - 0.1;
result.p_freq_ramp = -0.2995018224359539 + frnd(0.2) - 0.1;
result.p_freq_dramp = 0.004598608156964473 + frnd(0.2) - 0.1;
result.p_vib_strength = -0.2202799497929496 + frnd(0.2) - 0.1;
result.p_vib_speed = 0.8084998703158364 + frnd(0.2) - 0.1;
result.p_arp_mod = -0.46410459213693644 + frnd(0.2) - 0.1;
result.p_arp_speed = -0.10955361249587248 + frnd(0.2) - 0.1;
result.p_duty = -0.9031808754347107 + frnd(0.2) - 0.1;
result.p_duty_ramp = -0.8128699999808343 + frnd(0.2) - 0.1;
result.p_repeat_speed = 0.7014860189319991 + frnd(0.2) - 0.1;
result.p_pha_offset = -0.9424902314367765 + frnd(0.2) - 0.1;
result.p_pha_ramp = -0.1055482222272056 + frnd(0.2) - 0.1;
result.p_lpf_freq = 0.9989765717851521 + frnd(0.2) - 0.1;
result.p_lpf_ramp = -0.25051720626043017 + frnd(0.2) - 0.1;
result.p_lpf_resonance = 0.32777871505494693 + frnd(0.2) - 0.1;
result.p_hpf_freq = 0.0023548750981756753 + frnd(0.2) - 0.1;
result.p_hpf_ramp = -0.002375673204842568 + frnd(0.2) - 0.1;
return result;
}
if (frnd(5) > 1) {
result.wave_type = Math.floor(frnd(SHAPES.length));
if (result.wave_type === 3) {
result.wave_type = SQUARE;
}
if (rnd(1)) {
result.p_arp_mod = 0.2697849293151393 + frnd(0.2) - 0.1;
result.p_arp_speed = -0.3131172257760948 + frnd(0.2) - 0.1;
result.p_base_freq = 0.8090588299313949 + frnd(0.2) - 0.1;
result.p_duty = -0.6210022920964955 + frnd(0.2) - 0.1;
result.p_duty_ramp = -0.00043441813553182567 + frnd(0.2) - 0.1;
result.p_env_attack = 0.004321877246874195 + frnd(0.2) - 0.1;
result.p_env_decay = 0.1 + frnd(0.2) - 0.1;
result.p_env_punch = 0.061737781504416146 + frnd(0.2) - 0.1;
result.p_env_sustain = 0.4987252564798832 + frnd(0.2) - 0.1;
result.p_freq_dramp = 0.31700340314222614 + frnd(0.2) - 0.1;
result.p_freq_limit = 0 + frnd(0.2) - 0.1;
result.p_freq_ramp = -0.163380391341416 + frnd(0.2) - 0.1;
result.p_hpf_freq = 0.4709005021145149 + frnd(0.2) - 0.1;
result.p_hpf_ramp = 0.6924667290539194 + frnd(0.2) - 0.1;
result.p_lpf_freq = 0.8351398631384511 + frnd(0.2) - 0.1;
result.p_lpf_ramp = 0.36616557192873134 + frnd(0.2) - 0.1;
result.p_lpf_resonance = -0.08685777111664439 + frnd(0.2) - 0.1;
result.p_pha_offset = -0.036084571580025544 + frnd(0.2) - 0.1;
result.p_pha_ramp = -0.014806445085568108 + frnd(0.2) - 0.1;
result.p_repeat_speed = -0.8094368475518489 + frnd(0.2) - 0.1;
result.p_vib_speed = 0.4496665457171294 + frnd(0.2) - 0.1;
result.p_vib_strength = 0.23413762515532424 + frnd(0.2) - 0.1;
} else {
result.p_arp_mod = -0.35697118026766184 + frnd(0.2) - 0.1;
result.p_arp_speed = 0.3581140690559588 + frnd(0.2) - 0.1;
result.p_base_freq = 1.3260897696157528 + frnd(0.2) - 0.1;
result.p_duty = -0.30984900436710694 + frnd(0.2) - 0.1;
result.p_duty_ramp = -0.0014374759133411626 + frnd(0.2) - 0.1;
result.p_env_attack = 0.3160357835682254 + frnd(0.2) - 0.1;
result.p_env_decay = 0.1 + frnd(0.2) - 0.1;
result.p_env_punch = 0.24323114016870148 + frnd(0.2) - 0.1;
result.p_env_sustain = 0.4 + frnd(0.2) - 0.1;
result.p_freq_dramp = 0.2866475886237244 + frnd(0.2) - 0.1;
result.p_freq_limit = 0 + frnd(0.2) - 0.1;
result.p_freq_ramp = -0.10956352368742976 + frnd(0.2) - 0.1;
result.p_hpf_freq = 0.20772718017889846 + frnd(0.2) - 0.1;
result.p_hpf_ramp = 0.1564090637378835 + frnd(0.2) - 0.1;
result.p_lpf_freq = 0.6021372770637031 + frnd(0.2) - 0.1;
result.p_lpf_ramp = 0.24016227139979027 + frnd(0.2) - 0.1;
result.p_lpf_resonance = -0.08787383821160144 + frnd(0.2) - 0.1;
result.p_pha_offset = -0.381597686151701 + frnd(0.2) - 0.1;
result.p_pha_ramp = -0.0002481687661373495 + frnd(0.2) - 0.1;
result.p_repeat_speed = 0.07812112809425686 + frnd(0.2) - 0.1;
result.p_vib_speed = -0.13648848579133943 + frnd(0.2) - 0.1;
result.p_vib_strength = 0.0018874158972302657 + frnd(0.2) - 0.1;
}
return result;
}
result.wave_type = Math.floor(frnd(SHAPES.length));//TRIANGLE;
if (result.wave_type === 1 || result.wave_type === 3) {
result.wave_type = 2;
}
//new
result.p_base_freq = 0.85 + frnd(0.15);
result.p_freq_ramp = 0.3 + frnd(0.15);
// result.p_freq_dramp = 0.3+frnd(2.0);
result.p_env_attack = 0 + frnd(0.09);
result.p_env_sustain = 0.2 + frnd(0.3);
result.p_env_decay = 0 + frnd(0.1);
result.p_duty = frnd(2.0) - 1.0;
result.p_duty_ramp = Math.pow(frnd(2.0) - 1.0, 3.0);
result.p_repeat_speed = 0.5 + frnd(0.1);
result.p_pha_offset = -0.3 + frnd(0.9);
result.p_pha_ramp = -frnd(0.3);
result.p_arp_speed = 0.4 + frnd(0.6);
result.p_arp_mod = 0.8 + frnd(0.1);
result.p_lpf_resonance = frnd(2.0) - 1.0;
result.p_lpf_freq = 1.0 - Math.pow(frnd(1.0), 3.0);
result.p_lpf_ramp = Math.pow(frnd(2.0) - 1.0, 3.0);
if (result.p_lpf_freq < 0.1 && result.p_lpf_ramp < -0.05)
result.p_lpf_ramp = -result.p_lpf_ramp;
result.p_hpf_freq = Math.pow(frnd(1.0), 5.0);
result.p_hpf_ramp = Math.pow(frnd(2.0) - 1.0, 5.0);
return result;
};
pushSound = function() {
var result=Params();
result.wave_type = Math.floor(frnd(SHAPES.length));//TRIANGLE;
if (result.wave_type === 2) {
result.wave_type++;
}
if (result.wave_type === 0) {
result.wave_type = NOISE;
}
//new
result.p_base_freq = 0.1 + frnd(0.4);
result.p_freq_ramp = 0.05 + frnd(0.2);
result.p_env_attack = 0.01 + frnd(0.09);
result.p_env_sustain = 0.01 + frnd(0.09);
result.p_env_decay = 0.01 + frnd(0.09);
result.p_repeat_speed = 0.3 + frnd(0.5);
result.p_pha_offset = -0.3 + frnd(0.9);
result.p_pha_ramp = -frnd(0.3);
result.p_arp_speed = 0.6 + frnd(0.3);
result.p_arp_mod = 0.8 - frnd(1.6);
return result;
};
powerUp = function() {
var result=Params();
if (rnd(1))
result.wave_type = SAWTOOTH;
else
result.p_duty = frnd(0.6);
result.wave_type = Math.floor(frnd(SHAPES.length));
if (result.wave_type === 3) {
result.wave_type = SQUARE;
}
if (rnd(1))
{
result.p_base_freq = 0.2 + frnd(0.3);
result.p_freq_ramp = 0.1 + frnd(0.4);
result.p_repeat_speed = 0.4 + frnd(0.4);
}
else
{
result.p_base_freq = 0.2 + frnd(0.3);
result.p_freq_ramp = 0.05 + frnd(0.2);
if (rnd(1))
{
result.p_vib_strength = frnd(0.7);
result.p_vib_speed = frnd(0.6);
}
}
result.p_env_attack = 0.0;
result.p_env_sustain = frnd(0.4);
result.p_env_decay = 0.1 + frnd(0.4);
return result;
};
hitHurt = function() {
result = Params();
result.wave_type = rnd(2);
if (result.wave_type === SINE)
result.wave_type = NOISE;
if (result.wave_type === SQUARE)
result.p_duty = frnd(0.6);
result.wave_type = Math.floor(frnd(SHAPES.length));
result.p_base_freq = 0.2 + frnd(0.6);
result.p_freq_ramp = -0.3 - frnd(0.4);
result.p_env_attack = 0.0;
result.p_env_sustain = frnd(0.1);
result.p_env_decay = 0.1 + frnd(0.2);
if (rnd(1))
result.p_hpf_freq = frnd(0.3);
return result;
};
jump = function() {
result = Params();
result.wave_type = SQUARE;
result.wave_type = Math.floor(frnd(SHAPES.length));
if (result.wave_type === 3) {
result.wave_type = SQUARE;
}
result.p_duty = frnd(0.6);
result.p_base_freq = 0.3 + frnd(0.3);
result.p_freq_ramp = 0.1 + frnd(0.2);
result.p_env_attack = 0.0;
result.p_env_sustain = 0.1 + frnd(0.3);
result.p_env_decay = 0.1 + frnd(0.2);
if (rnd(1))
result.p_hpf_freq = frnd(0.3);
if (rnd(1))
result.p_lpf_freq = 1.0 - frnd(0.6);
return result;
};
blipSelect = function() {
result = Params();
result.wave_type = rnd(1);
result.wave_type = Math.floor(frnd(SHAPES.length));
if (result.wave_type === 3) {
result.wave_type = rnd(1);
}
if (result.wave_type === SQUARE)
result.p_duty = frnd(0.6);
result.p_base_freq = 0.2 + frnd(0.4);
result.p_env_attack = 0.0;
result.p_env_sustain = 0.1 + frnd(0.1);
result.p_env_decay = frnd(0.2);
result.p_hpf_freq = 0.1;
return result;
};
random = function() {
result = Params();
result.wave_type = Math.floor(frnd(SHAPES.length));
result.p_base_freq = Math.pow(frnd(2.0) - 1.0, 2.0);
if (rnd(1))
result.p_base_freq = Math.pow(frnd(2.0) - 1.0, 3.0) + 0.5;
result.p_freq_limit = 0.0;
result.p_freq_ramp = Math.pow(frnd(2.0) - 1.0, 5.0);
if (result.p_base_freq > 0.7 && result.p_freq_ramp > 0.2)
result.p_freq_ramp = -result.p_freq_ramp;
if (result.p_base_freq < 0.2 && result.p_freq_ramp < -0.05)
result.p_freq_ramp = -result.p_freq_ramp;
result.p_freq_dramp = Math.pow(frnd(2.0) - 1.0, 3.0);
result.p_duty = frnd(2.0) - 1.0;
result.p_duty_ramp = Math.pow(frnd(2.0) - 1.0, 3.0);
result.p_vib_strength = Math.pow(frnd(2.0) - 1.0, 3.0);
result.p_vib_speed = frnd(2.0) - 1.0;
result.p_env_attack = Math.pow(frnd(2.0) - 1.0, 3.0);
result.p_env_sustain = Math.pow(frnd(2.0) - 1.0, 2.0);
result.p_env_decay = frnd(2.0) - 1.0;
result.p_env_punch = Math.pow(frnd(0.8), 2.0);
if (result.p_env_attack + result.p_env_sustain + result.p_env_decay < 0.2) {
result.p_env_sustain += 0.2 + frnd(0.3);
result.p_env_decay += 0.2 + frnd(0.3);
}
result.p_lpf_resonance = frnd(2.0) - 1.0;
result.p_lpf_freq = 1.0 - Math.pow(frnd(1.0), 3.0);
result.p_lpf_ramp = Math.pow(frnd(2.0) - 1.0, 3.0);
if (result.p_lpf_freq < 0.1 && result.p_lpf_ramp < -0.05)
result.p_lpf_ramp = -result.p_lpf_ramp;
result.p_hpf_freq = Math.pow(frnd(1.0), 5.0);
result.p_hpf_ramp = Math.pow(frnd(2.0) - 1.0, 5.0);
result.p_pha_offset = Math.pow(frnd(2.0) - 1.0, 3.0);
result.p_pha_ramp = Math.pow(frnd(2.0) - 1.0, 3.0);
result.p_repeat_speed = frnd(2.0) - 1.0;
result.p_arp_speed = frnd(2.0) - 1.0;
result.p_arp_mod = frnd(2.0) - 1.0;
return result;
};
var generators = [
pickupCoin,
laserShoot,
explosion,
powerUp,
hitHurt,
jump,
blipSelect,
pushSound,
random,
birdSound
];
var generatorNames = [
'pickupCoin',
'laserShoot',
'explosion',
'powerUp',
'hitHurt',
'jump',
'blipSelect',
'pushSound',
'random',
'birdSound'
];
/*
i like 9675111
*/
generateFromSeed = function(seed) {
rng = new RNG((seed / 100) | 0);
var generatorindex = seed % 100;
var soundGenerator = generators[generatorindex % generators.length];
seeded = true;
var result = soundGenerator();
result.seed = seed;
seeded = false;
return result;
};
function SoundEffect(length, sample_rate) {
this._buffer = AUDIO_CONTEXT.createBuffer(1, length, sample_rate);
}
SoundEffect.prototype.getBuffer = function() {
return this._buffer.getChannelData(0);
};
//unlock bullshit
function ULBS(){
if (AUDIO_CONTEXT.state === 'suspended')
{
var unlock = function()
{
AUDIO_CONTEXT.resume().then(function()
{
document.body.removeEventListener('touchstart', unlock);
document.body.removeEventListener('touchend', unlock);
document.body.removeEventListener('mousedown', unlock);
document.body.removeEventListener('mouseup', unlock);
document.body.removeEventListener('keydown', unlock);
document.body.removeEventListener('keyup', unlock);
});
};
document.body.addEventListener('touchstart', unlock, false);
document.body.addEventListener('touchend', unlock, false);
document.body.addEventListener('mousedown', unlock, false);
document.body.addEventListener('mouseup', unlock, false);
document.body.addEventListener('keydown', unlock, false);
document.body.addEventListener('keyup', unlock, false);
}
}
SoundEffect.prototype.play = function() {
ULBS();
var source = AUDIO_CONTEXT.createBufferSource();
var filter1 = AUDIO_CONTEXT.createBiquadFilter();
var filter2 = AUDIO_CONTEXT.createBiquadFilter();
var filter3 = AUDIO_CONTEXT.createBiquadFilter();
source.buffer = this._buffer;
source.connect(filter1);
filter1.frequency.value = 1600;
filter2.frequency.value = 1600;
filter3.frequency.value = 1600;
filter1.connect(filter2);
filter2.connect(filter3);
filter3.connect(AUDIO_CONTEXT.destination);
var t = AUDIO_CONTEXT.currentTime;
if (typeof source.start != 'undefined') {
source.start(t);
} else {
source.noteOn(t);
}
source.onended = function() {
filter3.disconnect()
}
};
SoundEffect.MIN_SAMPLE_RATE = 22050;
if (typeof AUDIO_CONTEXT == 'undefined') {
SoundEffect = function SoundEffect(length, sample_rate) {
this._sample_rate = sample_rate;
this._buffer = new Array(length);
this._audioElement = null;
};
SoundEffect.prototype.getBuffer = function() {
this._audioElement = null;
return this._buffer;
};
SoundEffect.prototype.play = function() {
if (this._audioElement) {
this._audioElement.cloneNode(false).play();
} else {
for (var i = 0; i < this._buffer.length; i++) {
// bit_depth is always 8, rescale [-1.0, 1.0) to [0, 256)
this._buffer[i] = 255 & Math.floor(128 * Math.max(0, Math.min(this._buffer[i] + 1, 2)));
}
var wav = MakeRiff(this._sample_rate, BIT_DEPTH, this._buffer);
this._audioElement = new Audio();
this._audioElement.src = wav.dataURI;
this._audioElement.play();
}
};
SoundEffect.MIN_SAMPLE_RATE = 1;
}
SoundEffect.generate = function(ps) {
/* window.console.log(ps.wave_type + "\t" + ps.seed);
var psstring="";
for (var n in ps) {
if (ps.hasOwnProperty(n)) {
psstring = psstring +"result." + n+" = " + ps[n] + ";\n";
}
}
window.console.log(ps);
window.console.log(psstring);*/
function repeat() {
rep_time = 0;
fperiod = 100.0 / (ps.p_base_freq * ps.p_base_freq + 0.001);
period = Math.floor(fperiod);
fmaxperiod = 100.0 / (ps.p_freq_limit * ps.p_freq_limit + 0.001);
fslide = 1.0 - Math.pow(ps.p_freq_ramp, 3.0) * 0.01;
fdslide = -Math.pow(ps.p_freq_dramp, 3.0) * 0.000001;
square_duty = 0.5 - ps.p_duty * 0.5;
square_slide = -ps.p_duty_ramp * 0.00005;
if (ps.p_arp_mod >= 0.0)
arp_mod = 1.0 - Math.pow(ps.p_arp_mod, 2.0) * 0.9;
else
arp_mod = 1.0 + Math.pow(ps.p_arp_mod, 2.0) * 10.0;
arp_time = 0;
arp_limit = Math.floor(Math.pow(1.0 - ps.p_arp_speed, 2.0) * 20000 + 32);
if (ps.p_arp_speed == 1.0)
arp_limit = 0;
};
var rep_time;
var fperiod, period, fmaxperiod;
var fslide, fdslide;
var square_duty, square_slide;
var arp_mod, arp_time, arp_limit;
repeat(); // First time through, this is a bit of a misnomer
// Filter
var fltp = 0.0;
var fltdp = 0.0;
var fltw = Math.pow(ps.p_lpf_freq, 3.0) * 0.1;
var fltw_d = 1.0 + ps.p_lpf_ramp * 0.0001;
var fltdmp = 5.0 / (1.0 + Math.pow(ps.p_lpf_resonance, 2.0) * 20.0) *
(0.01 + fltw);
if (fltdmp > 0.8) fltdmp = 0.8;
var fltphp = 0.0;
var flthp = Math.pow(ps.p_hpf_freq, 2.0) * 0.1;
var flthp_d = 1.0 + ps.p_hpf_ramp * 0.0003;
// Vibrato
var vib_phase = 0.0;
var vib_speed = Math.pow(ps.p_vib_speed, 2.0) * 0.01;
var vib_amp = ps.p_vib_strength * 0.5;
// Envelope
var env_vol = 0.0;
var env_stage = 0;
var env_time = 0;
var env_length = [
Math.floor(ps.p_env_attack * ps.p_env_attack * 100000.0),
Math.floor(ps.p_env_sustain * ps.p_env_sustain * 100000.0),
Math.floor(ps.p_env_decay * ps.p_env_decay * 100000.0)
];
var env_total_length = env_length[0] + env_length[1] + env_length[2];
// Phaser
var phase = 0;
var fphase = Math.pow(ps.p_pha_offset, 2.0) * 1020.0;
if (ps.p_pha_offset < 0.0) fphase = -fphase;
var fdphase = Math.pow(ps.p_pha_ramp, 2.0) * 1.0;
if (ps.p_pha_ramp < 0.0) fdphase = -fdphase;
var iphase = Math.abs(Math.floor(fphase));
var ipp = 0;
var phaser_buffer = [];
for (var i = 0; i < 1024; ++i)
phaser_buffer[i] = 0.0;
// Noise
var noise_buffer = [];
for (var i = 0; i < 32; ++i)
noise_buffer[i] = Math.random() * 2.0 - 1.0;
// Repeat
var rep_limit = Math.floor(Math.pow(1.0 - ps.p_repeat_speed, 2.0) * 20000
+ 32);
if (ps.p_repeat_speed == 0.0)
rep_limit = 0;
//var gain = 2.0 * Math.log(1 + (Math.E - 1) * ps.sound_vol);
var gain = 2.0 * ps.sound_vol;
var gain = Math.exp(ps.sound_vol) - 1;
var num_clipped = 0;
// ...end of initialization. Generate samples.
var sample_sum = 0;
var num_summed = 0;
var summands = Math.floor(44100 / ps.sample_rate);
var buffer_i = 0;
var buffer_length = Math.ceil(env_total_length / summands);
var buffer_complete = false;
var sound;
if (ps.sample_rate < SoundEffect.MIN_SAMPLE_RATE) {
// Assume 4x gets close enough to MIN_SAMPLE_RATE
sound = new SoundEffect(4 * buffer_length, SoundEffect.MIN_SAMPLE_RATE);
} else {
sound = new SoundEffect(buffer_length, ps.sample_rate)
}
var buffer = sound.getBuffer();
for (var t = 0;; ++t) {
// Repeats
if (rep_limit != 0 && ++rep_time >= rep_limit)
repeat();
// Arpeggio (single)
if (arp_limit != 0 && t >= arp_limit) {
arp_limit = 0;
fperiod *= arp_mod;
}
// Frequency slide, and frequency slide slide!
fslide += fdslide;
fperiod *= fslide;
if (fperiod > fmaxperiod) {
fperiod = fmaxperiod;
if (ps.p_freq_limit > 0.0)
buffer_complete = true;
}
// Vibrato
var rfperiod = fperiod;
if (vib_amp > 0.0) {
vib_phase += vib_speed;
rfperiod = fperiod * (1.0 + Math.sin(vib_phase) * vib_amp);
}
period = Math.floor(rfperiod);
if (period < 8) period = 8;
square_duty += square_slide;
if (square_duty < 0.0) square_duty = 0.0;
if (square_duty > 0.5) square_duty = 0.5;
// Volume envelope
env_time++;
if (env_time > env_length[env_stage]) {
env_time = 1;
env_stage++;
while (env_stage < 3 && env_length[env_stage] === 0)
env_stage++;
if (env_stage === 3)
break;
}
if (env_stage === 0)
env_vol = env_time / env_length[0];
else if (env_stage === 1)
env_vol = 1.0 + Math.pow(1.0 - env_time / env_length[1],
1.0) * 2.0 * ps.p_env_punch;
else // env_stage == 2
env_vol = 1.0 - env_time / env_length[2];
// Phaser step
fphase += fdphase;
iphase = Math.abs(Math.floor(fphase));
if (iphase > 1023) iphase = 1023;
if (flthp_d != 0.0) {
flthp *= flthp_d;
if (flthp < 0.00001)
flthp = 0.00001;
if (flthp > 0.1)
flthp = 0.1;
}
// 8x supersampling
var sample = 0.0;
for (var si = 0; si < 8; ++si) {
var sub_sample = 0.0;
phase++;
if (phase >= period) {
phase %= period;
if (ps.wave_type === NOISE)
for (var i = 0; i < 32; ++i)
noise_buffer[i] = Math.random() * 2.0 - 1.0;
}
// Base waveform
var fp = phase / period;
if (ps.wave_type === SQUARE) {
if (fp < square_duty)
sub_sample = 0.5;
else
sub_sample = -0.5;
} else if (ps.wave_type === SAWTOOTH) {
sub_sample = 1.0 - fp * 2;
} else if (ps.wave_type === SINE) {
sub_sample = Math.sin(fp * 2 * Math.PI);
} else if (ps.wave_type === NOISE) {
sub_sample = noise_buffer[Math.floor(phase * 32 / period)];
} else if (ps.wave_type === TRIANGLE) {
sub_sample = Math.abs(1 - fp * 2) - 1;
} else if (ps.wave_type === BREAKER) {
sub_sample = Math.abs(1 - fp * fp * 2) - 1;
} else {
throw new Exception('bad wave type! ' + ps.wave_type);
}
// Low-pass filter
var pp = fltp;
fltw *= fltw_d;
if (fltw < 0.0) fltw = 0.0;
if (fltw > 0.1) fltw = 0.1;
if (ps.p_lpf_freq != 1.0) {
fltdp += (sub_sample - fltp) * fltw;
fltdp -= fltdp * fltdmp;
} else {
fltp = sub_sample;
fltdp = 0.0;
}
fltp += fltdp;
// High-pass filter
fltphp += fltp - pp;
fltphp -= fltphp * flthp;
sub_sample = fltphp;
// Phaser
phaser_buffer[ipp & 1023] = sub_sample;
sub_sample += phaser_buffer[(ipp - iphase + 1024) & 1023];
ipp = (ipp + 1) & 1023;
// final accumulation and envelope application
sample += sub_sample * env_vol;
}
// Accumulate samples appropriately for sample rate
sample_sum += sample;
if (++num_summed >= summands) {
num_summed = 0;
sample = sample_sum / summands;
sample_sum = 0;
} else {
continue;
}
sample = sample / 8 * masterVolume;
sample *= gain;
buffer[buffer_i++] = sample;
if (ps.sample_rate < SoundEffect.MIN_SAMPLE_RATE) {
buffer[buffer_i++] = sample;
buffer[buffer_i++] = sample;
buffer[buffer_i++] = sample;
}
}
if (summands > 0) {
sample = sample_sum / summands;
sample = sample / 8 * masterVolume;
sample *= gain;
buffer[buffer_i++] = sample;
if (ps.sample_rate < SoundEffect.MIN_SAMPLE_RATE) {
buffer[buffer_i++] = sample;
buffer[buffer_i++] = sample;
buffer[buffer_i++] = sample;
}
}
return sound;
};
if (typeof exports != 'undefined') {
// For node.js
var RIFFWAVE = require('./riffwave').RIFFWAVE;
exports.Params = Params;
exports.generate = generate;
}
var sfxCache = {};
var cachedSeeds = [];
var CACHE_MAX = 50;
function cacheSeed(seed){
if (seed in sfxCache) {
return sfxCache[seed];
}