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implement volume column slides

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This commit is contained in:
Andy Sloane 2015-10-30 22:28:03 -07:00
commit ee005ef668
1 changed files with 14 additions and 2 deletions
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16
xm.js
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@ -252,12 +252,23 @@ function next_row() {
}
}
}
ch.voleffectfn = undefined;
if (r[i][2] != -1) { // volume column
var v = r[i][2];
ch.voleffectdata = v & 0x0f;
if (v < 0x10) {
console.log("channel", i, "invalid volume", v.toString(16));
} else if (v <= 0x50) {
ch.vol = v - 0x10;
} else if (v >= 0x60 && v < 0x70) { // volume slide down
ch.voleffectfn = function() {
ch.vol = Math.max(0, ch.vol - ch.voleffectdata);
}
} else if (v >= 0x70 && v < 0x80) { // volume slide up
ch.voleffectfn = function() {
ch.vol = Math.min(64, ch.vol + ch.voleffectdata);
}
} else if (v >= 0x80 && v < 0x90) { // fine volume slide down
ch.vol = Math.max(0, ch.vol - (v & 0x0f));
} else if (v >= 0x90 && v < 0xa0) { // fine volume slide up
@ -373,8 +384,9 @@ function next_tick() {
var ch = channelinfo[j];
var inst = ch.inst;
ch.periodoffset = 0;
if (cur_tick != 0 && ch.effectfn) {
ch.effectfn(ch);
if (cur_tick != 0) {
if(ch.voleffectfn) ch.voleffectfn(ch);
if(ch.effectfn) ch.effectfn(ch);
}
if (isNaN(ch.period)) {
console.log(prettify_notedata(patterns[cur_pat][cur_row-1][j]),