Demos/jsxm
Watch
1
0
Fork
You've already forked jsxm
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

added test for vibrato... and fixed vibrato

Browse source 
naturally when i actually tested it, it turned out to be subtly broken

also reorg'd the tests a bit, sorry @hillerstorm.
This commit is contained in:
Andy Sloane 2015-11-13 22:06:50 -08:00
commit 570aa33a20
6 changed files with 104 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

85
test/effects.js vendored
View file

@ -7,7 +7,7 @@ var XMPlayer = window.XMPlayer;
// - porta+vol 5xy
// - etc etc
tests['test 0xy arpeggio'] = function(assert) {
exports['test 0xy arpeggio'] = function(assert) {
var xm = testdata.resetXMData();
// [pat][row][channel]
xm.patterns[0][0][0] = [48, 1, -1, 0, 0x4f]; // C-4 1 -- 04f
@ -26,7 +26,7 @@ tests['test 0xy arpeggio'] = function(assert) {
assert.equal(ch.period, 1152 - 16*0, 'row 1 tick 0 period 0');
};
tests['test 1xx slide up'] = function(assert) {
exports['test 1xx slide up'] = function(assert) {
var xm = testdata.resetXMData();
// [pat][row][channel]
xm.patterns[0][0][0] = [48, 1, -1, 1, 0x01]; // C-4 1 -- 101
@ -45,7 +45,7 @@ tests['test 1xx slide up'] = function(assert) {
assert.equal(ch.period, 1152 - 3, 'row 1 tick 1 period -3');
};
tests['test 2xx slide down'] = function(assert) {
exports['test 2xx slide down'] = function(assert) {
var xm = testdata.resetXMData();
// [pat][row][channel]
xm.patterns[0][0][0] = [48, 1, -1, 2, 0x01]; // C-4 1 -- 201
@ -55,16 +55,16 @@ tests['test 2xx slide down'] = function(assert) {
var ch = xm.channelinfo[0];
assert.equal(ch.period, 1152, 'row 0 tick 0 period 0');
XMPlayer.nextTick();
assert.equal(ch.period, 1152 + 1, 'row 0 tick 1 period -1');
assert.equal(ch.period, 1152 + 1, 'row 0 tick 1 period +1');
XMPlayer.nextTick();
assert.equal(ch.period, 1152 + 2, 'row 0 tick 2 period -2');
assert.equal(ch.period, 1152 + 2, 'row 0 tick 2 period +2');
XMPlayer.nextTick();
assert.equal(ch.period, 1152 + 2, 'row 1 tick 0 period -2');
assert.equal(ch.period, 1152 + 2, 'row 1 tick 0 period +2');
XMPlayer.nextTick();
assert.equal(ch.period, 1152 + 3, 'row 1 tick 1 period -3');
assert.equal(ch.period, 1152 + 3, 'row 1 tick 1 period +3');
};
tests['test 3xx portamento'] = function(assert) {
exports['test 3xx portamento'] = function(assert) {
var xm = testdata.resetXMData();
// [pat][row][channel]
xm.patterns[0][0][0] = [48, 1, -1, 0, 0x00]; // C-4 1 -- 000
@ -83,3 +83,72 @@ tests['test 3xx portamento'] = function(assert) {
assert.equal(ch.period, 1152 - 16, 'row 1 tick 2 period -16');
};
exports['test 4xy vibrato'] = function(assert) {
var xm = testdata.resetXMData();
// vibrato 4xy: speed x, depth y
// full cycle is 64/speed
// [pat][row][channel]
xm.patterns[0] = [
[[48, 1, -1, 4, 0x81]], // C-4 1 -- 481
[[-1, -1, -1, 4, 0x02]], // --- -- -- 402
[[-1, -1, -1, 4, 0x10]], // --- -- -- 410
[[-1, -1, -1, 4, 0x00]], // --- -- -- 400
[[-1, -1, -1, 0, 0x00]], // --- -- -- 000 - no vibrato
[[-1, -1, -1, 4, 0x00]], // --- -- -- 400 - resume vibrato @ pos 0
];
// I should really be testing ch.doff directly
XMPlayer.xm.tempo = 3;
var ch = xm.channelinfo[0];
XMPlayer.nextTick(); // row 0 tick 0
var p0 = ch.doff;
assert.equal(ch.periodoffset, 0, 'row 0 tick 0 periodoffset=0');
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');
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');
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');
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');
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');
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');
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');
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');
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');
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');
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');
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
// I actually don't know whether vibrato is supposed to reset when the effect
// goes away or whether it should resume. Resuming is simpler to implement so
// 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');
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');
};