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player_min.js
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/*
* The player and music is done using https://github.com/mbitsnbites/soundbox . Obviously it's been
* heavily minimizied and all non-essential functionality has been striped away, such as performance
* since this is only run in the beginning of the demo to generate the music. This doesn't run when
* audio is actually playing.
*
* Original license for the minified player, that was used as a base for the version seen here
*
* Copyright (c) 2011-2013 Marcus Geelnard
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source
* distribution.
*
*/
var mMixBuf = new Int32Array(15812480); // Create work buffer (initially cleared)
var wave = new Uint8Array(31625004 /*44 + 15812480 * 2*/);
var i;
var j;
// Header, precalculated values for this particular song
wave.set([82, 73, 70, 70, 36, 143, 226, 1, 87, 65, 86, 69, 102, 109, 116, 32, 16, 0, 0, 0, 1, 0,
2, 0, 68, 172, 0, 0, 16, 177, 2, 0, 4, 0, 16, 0, 100, 97, 116, 97, 0, 143, 226, 1]);
[ // Instruments, this determines the sound of each instrument
[192,143,0,7744,62500,3,26,1,0,32,63760],
[192,192,47524,31684,73984,2,2,1,21,121,63760],
[194,170,16,0,14400,1,255,0.18,20,71,15940],
[146,224,234256,14884,61504,2,15,1,31,28,47820],
[255,228,256,0,5184,3,15,0.765,30,16,15940]
].map((X, I) => {
var p, row, i2, k, rsample, f, lsample;
var chnBuf = new Int32Array(15812480);
var low = 0, band = 0, high;
for (p = 0; p <= 30; p++) {
var colls = [ // Columns, these are the notes that are played
[[25,,,,,,,,,,,,,,,,25,,,,,,,,,,,,,,,,37,,,,,,,,,,,,,,,,37],
[30,,,,,,,,37,,,,,,,,37,,,,,,,,32,,,,,,,,42,,,,,,,,49,,,,,,,,49,,,,,,,,44],
[33,,,,,,,,30,,,,,,,,35,,,,,,,,32,,,,,,,,45,,,,,,,,42,,,,,,,,47,,,,,,,,44]],
[[57,,,,,,,,,,,,,,,,57,,,,,,,,,,,,,,,,62,,,,,,,,,,,,,,,,62,,,,,,,,,,,,,,,,69,,,,,,,,,,,,,,,,69],
[57,,,,,,,,,,,,,,,,57,,,,,,,,,,,,,,,,62,,,,,,,,,,,,,,,,62,,,,,,,,,,,,,,,,68,,,,,,,,,,,,,,,,68],
[66,,,,,,,,,,,,,,,,66,,,,,,,,,,,,,,,,57,,,,,,,,,,,,,,,,57,,,,,,,,,,,,,,,,62,,,,,,,,,,,,,,,,62,,,,,,,,,,,,,,,,69,,,,,,,,,,,,,,,,69],
[54,,,,,,,,,,,,,,,,54,,,,,,,,,,,,,,,,62,,,,,,,,66,,,,,,,,62,,,,,,,,,,,,,,,,69,,,,,,,,,,,,,,,,69,,,,,,,,,,,,,,,,74,,,,,,,,,,,,,,,,74],
[55,,,,,,,,,,,,,,,,55,,,,,,,,,,,,,,,,62,,,,50,,,,38,,,,,,,,62,,,,,,,,,,,,,,,,69,,,,,,,,,,,,,,,,69,,,,,,,,,,,,,,,,75,,,,,,,,,,,,,,,72,75],
[55,39,,,,,,,,,,,,,,,55,39,,,,,,,,,,,,,,,63,,,,,,,,,,,,,,,,63,,,,,,,,,,,,,,,,70,,,,,,,,,,,,,,,,70,,,,,,,,,,,,,,,,75,,,,,,,,,,,,,,,,75],
[54,38,,,,,,,,,,,,,,,54,50,,,,,,,,,,,,,,,62,,,,,,,,,,,,,,,66,62,,,,,,,,,,,,,,,,69,,,,,,,,,,,,,,,,69,,,,,,,,,,,,,,,,74,,,,,,,,,,,,,,,,74],
[49,,,,,,,,,,,,49],
[30,,,,,,,,,,,,,,,,37],
[38,,,,,,,,,,,,,,,,40],
[18,,,,,,,,,,18,,,,,,,,,,18,,,,,,,,,,,,7,,,,,,,,,,7,,,,,,,,,,7]],
[[78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,77,77,77,77,77,77,77,77,77,77,77,77,77,77,77,77],
[78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,80,80,80,80,80,80,80,80,80,80,80,80,80,80,80,80],
[85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,77,77,77,77,77,77,77,77,77,77,77,77,77,77,77,77],
[78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,80,80,80,80,80,80,80,80,80,80,80,80,80,80,80,80,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85]],
[[66]],
[[66,68,69,73,66,68,69,73,66,68,69,73,66,68,69,73,65,68,69,73,65,68,69,73,65,68,69,73,65,68,69,73],
[62,66,69,73,62,66,69,73,62,66,69,73,62,66,69,73,64,68,69,73,64,68,69,73,65,68,69,73,65,68,69,73]]
][I][
[ // Patterns, which column of notes to play from above and when
[,,,,,,,,,,0,0,0,1,2,1,2,1,2,1,2,1,2,1,2,1,2,0,0,0],
[0,0,1,2,1,3,4,5,6,7,7,7,7,,,8,9,8,9,8,9,8,9,8,9,8,9,7,7,10,10],
[,,,,,,,,,,,,,,,,,,,0,1,2,3,2,3,2,3],
[,,,,,,,,,,,,,,,,,,,0,,,,0,0,0,0,0,0,0],
[,,,,,,,,,0,0,0,0,0,1,0,1,0,1,0,1,0,1,0,1,0,1]
][I][p]
];
for (row = 0; row < 32; row++) {
if (colls)
for (i = 0; i < 4; i++) {
if (colls[row + i * 32] > 0) {
var noteBuf = new Int32Array(X[2] + X[3] + X[4]);
var c1 = 0, c2 = 0;
var e;
// Generate one note (attack + sustain + release)
for (j = 0; j < X[2] + X[3] + X[4]; j++) {
// Envelope
e = 1;
if (j < X[2])
e = j / X[2];
else if (j >= X[2] + X[3])
e -= (j - X[2] - X[3]) / X[4];
// Calculate note frequencies for the oscillators
c1 += 0.00396 * Math.pow(2, (colls[row + i * 32] - 47) / 12); // 0.00395950375
c2 += 0.00396 * Math.pow(2, (colls[row + i * 32] - 35) / 12); // 0.00395950375
// Add to (mono) channel buffer
noteBuf[j] = (
Math.sin(c1 * 6.283184) * X[0] // TODO: PI * 2
+ Math.sin(c2 * 6.283184) * X[1]
) * e * 80;
}
for (j = 0, i2 = (p * 32 + row) * 7970 * 2; j < X[2] + X[3] + X[4]; j++, i2 += 2)
chnBuf[i2] += noteBuf[j];
}
}
for (j = 0; j < 7970; j++) {
k = ((p * 32 + row) * 7970 + j) * 2;
f = 1.5 * Math.sin(X[6] * .00308); // 43.23529 * 3.141592 / 44100); // FX_FREQ
low += f * band;
high = X[7] * (chnBuf[k] - band) - low; // FX_RESONANCE
band += f * high;
rsample = X[5] == 3 ? band : X[5] == 1 ? high : low;
// Distortion
if (X[8] * .00001) { // FX_DIST
rsample *= X[8] * .00001;
rsample = rsample < 1 ? rsample > -1 ? Math.sin(rsample * .25 * 6.283184) : -1 : 1;
rsample /= X[8] * .00001;
}
lsample = rsample *= X[9] / 64; // FX_DRIVE
if (k >= X[10]) { // FX_DELAY_TIME
lsample += chnBuf[k-X[10]+1] * 93 / 255; // FX_DELAY_TIME, FX_DELAY_AMT
rsample += chnBuf[k-X[10]] * 93 / 255; // FX_DELAY_TIME, FX_DELAY_AMT
}
mMixBuf[k] += chnBuf[k] = lsample;
mMixBuf[k + 1] += chnBuf[k + 1] = rsample;
}
}
}
});
// Append actual wave data
for (i = 0, j = 44; i < 15812480; i++) {
wave[j++] = mMixBuf[i] < -32767 ? -32767 : (mMixBuf[i] > 32767 ? 32767 : mMixBuf[i])
& 255;
wave[j++] = (mMixBuf[i] < -32767 ? -32767 : (mMixBuf[i] > 32767 ? 32767 : mMixBuf[i]) >> 8)
& 255;
}
mMixBuf = new Audio();
mMixBuf.src = URL.createObjectURL(new Blob([wave], {type: "audio/wav"}));