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Merge pull request #21 from hillerstorm/implement_E4x

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Implement E4x and address some vibrato issues
This commit is contained in:
Johan Hillerström 2015-11-21 20:25:35 +01:00
commit 7153fa7f3c
7 changed files with 216 additions and 22 deletions
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2
index.html
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@ -72,7 +72,7 @@
code: <a href="http://github.com/a1k0n/jsxm/">github.com/a1k0n/jsxm</a>
todo:
- missing XM effects:
- E3x, E4x, E6x, E7x, E9x, EDx, EEx
- E3x, E6x, E7x, E9x, EDx, EEx
- 7xy - tremolo
- Kxx, Lxx, Pxy, Txy
- render pattern with the wider fonts for fewer channels

5
package.json
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@ -7,7 +7,10 @@
"repository": "a1k0n/jsxm",
"author": "Andy Sloane <andy@a1k0n.net> (http://www.a1k0n.net/)",
"license": "MIT",
"contributors": [{
"name": "Johan Hillerström",
"email": "progr@mmer.nu"
}],
"main": "index.html",
"window": {
"frame": true,

191
test/effects.js vendored
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@ -85,7 +85,7 @@ exports['test 3xx portamento'] = function(assert) {
assert.equal(ch.period, 1152 - 16, 'row 1 tick 2 period -16');
};
exports['test 4xy vibrato'] = function(assert) {
exports['test 4xy vibrato - sine'] = function(assert) {
var xm = testdata.resetXMData();
// vibrato 4xy: speed x, depth y
// full cycle is 64/speed
@ -107,37 +107,37 @@ exports['test 4xy vibrato'] = function(assert) {
XMPlayer.nextTick(); // row 0 tick 1
// compute logical period p from actual play frequency
var p = 16*12 * Math.log(p0 / ch.doff) / Math.log(2);
assert.equal(p.toFixed(3), "0.707", 'row 0 tick 1 period +0.707');
assert.equal(p.toFixed(3), "0.000", 'row 0 tick 1 period +0');
XMPlayer.nextTick(); // row 0 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "1.000", 'row 0 tick 2 period +1.000');
assert.equal(p.toFixed(3), "1.414", 'row 0 tick 2 period +1.414');
XMPlayer.nextTick(); // row 1 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "1.414", 'row 1 tick 0 period +1.414');
assert.equal(p.toFixed(3), "4.000", 'row 1 tick 0 period +4.000');
XMPlayer.nextTick(); // row 1 tick 1
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "0.000", 'row 1 tick 1 period +0');
assert.equal(p.toFixed(3), "4.000", 'row 1 tick 1 period +4.000');
XMPlayer.nextTick(); // row 1 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.414", 'row 1 tick 2 period -1.414');
assert.equal(p.toFixed(3), "2.828", 'row 1 tick 2 period 2.828');
XMPlayer.nextTick(); // row 2 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-2.000", 'row 2 tick 0 period -2.000');
assert.equal(p.toFixed(3), "0.000", 'row 2 tick 0 period +0');
XMPlayer.nextTick(); // row 2 tick 1
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.990", 'row 2 tick 1 period -1.990');
assert.equal(p.toFixed(3), "0.000", 'row 2 tick 1 period +0');
XMPlayer.nextTick(); // row 2 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.962", 'row 2 tick 2 period -1.962');
assert.equal(p.toFixed(3), "-0.392", 'row 2 tick 2 period -0.392');
XMPlayer.nextTick(); // row 3 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.914", 'row 3 tick 0 period -1.914');
assert.equal(p.toFixed(3), "-0.780", 'row 3 tick 0 period -0.780');
XMPlayer.nextTick(); // row 3 tick 1
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.848", 'row 3 tick 1 period -1.848');
assert.equal(p.toFixed(3), "-0.780", 'row 3 tick 1 period -0.780');
XMPlayer.nextTick(); // row 3 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.764", 'row 3 tick 2 period -1.764');
assert.equal(p.toFixed(3), "-1.161", 'row 3 tick 2 period -1.161');
XMPlayer.nextTick(); // row 4 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "0.000", 'row 4 tick 0 period 0 - no vibrato');
@ -148,16 +148,153 @@ exports['test 4xy vibrato'] = function(assert) {
// that's what I'm assuming here...
XMPlayer.nextTick(); // row 5 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.663", 'row 5 tick 0 period -1.663 - vibrato resume');
assert.equal(p.toFixed(3), "-1.531", 'row 5 tick 0 period -1.531 - vibrato resume');
XMPlayer.nextTick(); // row 5 tick 1
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.546", 'row 5 tick 1 period -1.546');
assert.equal(p.toFixed(3), "-1.531", 'row 5 tick 1 period -1.531');
XMPlayer.nextTick(); // row 5 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.414", 'row 5 tick 2 period -1.414');
assert.equal(p.toFixed(3), "-1.886", 'row 5 tick 2 period -1.886');
XMPlayer.nextTick(); // row 6 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.269", 'row 6 tick 0 period -1.269');
assert.equal(p.toFixed(3), "-1.111", 'row 6 tick 0 period -1.111');
};
exports['test 4xy vibrato - saw'] = function(assert) {
var xm = testdata.resetXMData();
// vibrato 4xy: speed x, depth y
// full cycle is 64/speed
xm.patterns[0] = [
[[48, 1, -1, 14, 0x41]], // C-4 1 -- E41 - 1 = saw (ramp-down)
[[-1, -1, -1, 4, 0x81]], // --- -- -- 481
[[-1, -1, -1, 4, 0x00]], // --- -- -- 400
[[-1, -1, -1, 0, 0x00]], // --- -- -- --- - no vibrato
[[-1, -1, -1, 4, 0x00]], // --- -- -- 400 - resume vibrato @ pos 0
];
XMPlayer.xm.tempo = 4;
var ch = xm.channelinfo[0];
assert.equal(ch.vibratotype, 0, 'initial vibratotype 0');
XMPlayer.nextTick(); // row 0 tick 0
var p0 = ch.doff;
assert.equal(ch.vibratotype, 1, 'row 0 tick 0 vibratotype=1');
XMPlayer.nextTick(); // row 0 tick 1
XMPlayer.nextTick(); // row 0 tick 2
XMPlayer.nextTick(); // row 0 tick 3
XMPlayer.nextTick(); // row 1 tick 0
assert.equal(ch.periodoffset, 0, 'row 1 tick 0 periodoffset=0');
XMPlayer.nextTick(); // row 1 tick 1
// compute logical period p from actual play frequency
var p = 16*12 * Math.log(p0 / ch.doff) / Math.log(2);
assert.equal(p.toFixed(3), "0.000", 'row 1 tick 1 period +0');
XMPlayer.nextTick(); // row 1 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "0.500", 'row 1 tick 2 period +0.500');
XMPlayer.nextTick(); // row 1 tick 3
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "1.000", 'row 1 tick 3 period +1.000');
XMPlayer.nextTick(); // row 2 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "1.500", 'row 2 tick 0 period +1.500');
XMPlayer.nextTick(); // row 2 tick 1
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "1.500", 'row 2 tick 1 period +1.500');
XMPlayer.nextTick(); // row 2 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-2.000", 'row 2 tick 2 period -2.000');
XMPlayer.nextTick(); // row 2 tick 3
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.500", 'row 2 tick 3 period -1.500');
XMPlayer.nextTick(); // row 3 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "0.000", 'row 3 tick 0 period 0 - no vibrato');
XMPlayer.nextTick(); // row 3 tick 1
XMPlayer.nextTick(); // row 3 tick 2
XMPlayer.nextTick(); // row 3 tick 3
XMPlayer.nextTick(); // row 4 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.000", 'row 4 tick 0 period -1.000 - vibrato resume');
XMPlayer.nextTick(); // row 4 tick 1
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-1.000", 'row 4 tick 1 period -1.000');
XMPlayer.nextTick(); // row 4 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-0.500", 'row 4 tick 2 period -0.500');
XMPlayer.nextTick(); // row 4 tick 3
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "0.000", 'row 4 tick 3 period +0');
};
exports['test 4xy vibrato - square'] = function(assert) {
var xm = testdata.resetXMData();
// vibrato 4xy: speed x, depth y
// full cycle is 64/speed
xm.patterns[0] = [
[[48, 1, -1, 14, 0x42]], // C-4 1 -- E42 - 2 = square
[[-1, -1, -1, 4, 0x81]], // --- -- -- 481
[[-1, -1, -1, 4, 0x02]], // --- -- -- 402
[[-1, -1, -1, 4, 0x10]], // --- -- -- 410
[[-1, -1, -1, 4, 0x03]], // --- -- -- 403
[[-1, -1, -1, 0, 0x00]], // --- -- -- --- - no vibrato
[[-1, -1, -1, 4, 0x00]], // --- -- -- 400 - resume vibrato @ pos 0
];
XMPlayer.xm.tempo = 3;
var ch = xm.channelinfo[0];
assert.equal(ch.vibratotype, 0, 'initial vibratotype 0');
XMPlayer.nextTick(); // row 0 tick 0
var p0 = ch.doff;
assert.equal(ch.vibratotype, 2, 'row 0 tick 0 vibratotype=2');
XMPlayer.nextTick(); // row 0 tick 1
XMPlayer.nextTick(); // row 0 tick 2
XMPlayer.nextTick(); // row 1 tick 0
assert.equal(ch.periodoffset, 2, 'row 1 tick 0 periodoffset=2');
XMPlayer.nextTick(); // row 1 tick 1
// compute logical period p from actual play frequency
var p = 16*12 * Math.log(p0 / ch.doff) / Math.log(2);
assert.equal(p.toFixed(3), "2.000", 'row 1 tick 1 period +2.000');
XMPlayer.nextTick(); // row 1 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "2.000", 'row 1 tick 2 period +2.000');
XMPlayer.nextTick(); // row 2 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "4.000", 'row 2 tick 0 period +4.000');
XMPlayer.nextTick(); // row 2 tick 1
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "4.000", 'row 2 tick 1 period +4.000');
XMPlayer.nextTick(); // row 2 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "4.000", 'row 2 tick 2 period +4.000');
XMPlayer.nextTick(); // row 3 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-4.000", 'row 3 tick 0 period -4.000');
XMPlayer.nextTick(); // row 3 tick 1
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-4.000", 'row 3 tick 1 period -4.000');
XMPlayer.nextTick(); // row 3 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-4.000", 'row 3 tick 2 period -4.000');
XMPlayer.nextTick(); // row 4 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-6.000", 'row 4 tick 0 period -6.000');
XMPlayer.nextTick(); // row 4 tick 1
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-6.000", 'row 4 tick 1 period -6.000');
XMPlayer.nextTick(); // row 4 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-6.000", 'row 4 tick 2 period -6.000');
XMPlayer.nextTick(); // row 4 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "0.000", 'row 4 tick 0 period 0 - no vibrato');
XMPlayer.nextTick(); // row 4 tick 1
XMPlayer.nextTick(); // row 4 tick 2
XMPlayer.nextTick(); // row 5 tick 0
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-6.000", 'row 5 tick 0 period -6.000 - vibrato resume');
XMPlayer.nextTick(); // row 5 tick 1
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-6.000", 'row 5 tick 1 period -6.000');
XMPlayer.nextTick(); // row 5 tick 2
p = -16*12 * Math.log(ch.doff / p0) / Math.log(2);
assert.equal(p.toFixed(3), "-6.000", 'row 5 tick 2 period -6.000');
};
exports['test Axy volume slide'] = function(assert) {
@ -322,6 +459,28 @@ exports['test Hxy global volume slide'] = function(assert) {
assert.equal(xm.global_volume, 128, 'row 3 tick 2 vol 128');
};
exports['test E4x set vibrato waveform'] = function(assert) {
var xm = testdata.resetXMData();
xm.patterns = [
[
[[48, 1, -1, 0, 0x00]], // C-4 1 -- --- (default waveform - sine)
[[48, 1, -1, 14, 0x41]], // C-4 1 -- E41 (saw, ramp-down)
[[48, 1, -1, 14, 0x42]], // C-4 1 -- E42 (square)
[[48, 1, -1, 14, 0x43]] // C-4 1 -- E43 (random)
]
];
xm.tempo = 1;
var ch = xm.channelinfo[0];
XMPlayer.nextTick();
assert.equal(ch.vibratotype, 0, 'row 0 tick 0 vibratotype=0');
XMPlayer.nextTick();
assert.equal(ch.vibratotype, 1, 'row 1 tick 0 vibratotype=1');
XMPlayer.nextTick();
assert.equal(ch.vibratotype, 2, 'row 2 tick 0 vibratotype=2');
XMPlayer.nextTick();
assert.equal(ch.vibratotype, 3, 'row 3 tick 0 vibratotype=3');
};
exports['test E5x finetune override'] = function(assert) {
var xm = testdata.resetXMData();
// set an initial finetune so we know we're overriding it...

2
test/instrument.js
View file

@ -46,10 +46,12 @@ exports['test note trigger'] = function(assert) {
XMPlayer.nextRow();
ch.pan = 1; // forcibly override panning
ch.off = 100; // and sample offset
ch.vibratopos = 1; // and vibrato position
XMPlayer.nextRow();
assert.equal(ch.note, 49, 'note updated after inst trigger');
assert.equal(ch.period, 1136, 'period updated after note trigger');
assert.equal(ch.vol, 0x33, 'vol not reset after note trigger');
assert.equal(ch.pan, 1, 'pan not reset after note trigger');
assert.equal(ch.off, 0, 'set offset=0');
assert.equal(ch.vibratopos, 0, 'set vibrato pos=0');
};

1
test/testdata.js
View file

@ -25,6 +25,7 @@ exports.resetXMData = function() {
vibratopos: 0,
vibratodepth: 1,
vibratospeed: 1,
vibratotype: 0,
});
xm.songpats = [0];
// 1 channel, 2 row blank pattern

5
xm.js
View file

@ -264,6 +264,10 @@ function nextRow() {
if (ch.note) {
ch.period = periodForNote(ch, ch.note);
}
// waveforms 0-3 are retriggered on new notes while 4-7 are continuous
if (ch.vibratotype < 4) {
ch.vibratopos = 0;
}
}
}
}
@ -697,6 +701,7 @@ function load(arrayBuf) {
vibratopos: 0,
vibratodepth: 1,
vibratospeed: 1,
vibratotype: 0,
});
}
console.log("header len " + hlen);

28
xmeffects.js
View file

@ -56,7 +56,7 @@ function eff_t1_3(ch) { // portamento
function eff_t0_4(ch, data) { // vibrato
if (data & 0x0f) {
ch.vibratodepth = data & 0x0f;
ch.vibratodepth = (data & 0x0f) * 2;
}
if (data >> 4) {
ch.vibratospeed = data >> 4;
@ -65,14 +65,35 @@ function eff_t0_4(ch, data) { // vibrato
}
function eff_t1_4(ch) { // vibrato
ch.periodoffset = Math.sin(ch.vibratopos * Math.PI / 32) * ch.vibratodepth;
ch.periodoffset = getVibratoDelta(ch.vibratotype, ch.vibratopos) * ch.vibratodepth;
if (isNaN(ch.periodoffset)) {
console.log("vibrato periodoffset NaN?",
ch.vibratopos, ch.vibratospeed, ch.vibratodepth);
ch.periodoffset = 0;
}
// only updates on non-first ticks
if (player.cur_tick > 0) {
ch.vibratopos += ch.vibratospeed;
ch.vibratopos &= 63;
}
}
function getVibratoDelta(type, x) {
var delta = 0;
switch (type & 0x03) {
case 1: // sawtooth (ramp-down)
delta = ((1 + x * 2 / 64) % 2) - 1;
break;
case 2: // square
case 3: // random (in FT2 these two are the same)
delta = x < 32 ? 1 : -1;
break;
case 0:
default: // sine
delta = Math.sin(x * Math.PI / 32);
break;
}
return delta;
}
function eff_t1_5(ch) { // portamento + volume slide
@ -135,6 +156,9 @@ function eff_t0_e(ch, data) { // extended effects!
case 2: // fine porta down
ch.period += data;
break;
case 4: // set vibrato waveform
ch.vibratotype = data & 0x07;
break;
case 5: // finetune
ch.fine = (data<<4) + data - 128;
break;