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various envelope/effect fixes

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Dubmood's .xms seem to expose a lot of bugs...
This commit is contained in:
Andy Sloane 2015-10-31 09:27:38 -07:00
commit 32b09bdf63
1 changed files with 11 additions and 8 deletions
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19
xm.js
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@ -309,8 +309,8 @@ function next_row() {
// alone
ch.envtick = 0;
ch.release = 0;
ch.env_vol = new EnvelopeFollower(inst.env_vol, inst.fadeout);
ch.env_pan = new EnvelopeFollower(inst.env_pan, 0);
ch.env_vol = new EnvelopeFollower(inst.env_vol);
ch.env_pan = new EnvelopeFollower(inst.env_pan);
}
}
}
@ -691,7 +691,7 @@ function eff_t0_b(ch, data) { // song jump (untested)
}
function eff_t0_c(ch, data) { // set volume
ch.vol = data & 0x3f;
ch.vol = Math.min(64, data);
}
function eff_t0_d(ch, data) { // pattern jump
@ -1085,12 +1085,14 @@ function playXM(arrayBuf) {
if (env_vol_type) {
// insert an automatic fadeout to 0 at the end of the envelope
var env_end_tick = env_vol[env_vol.length-2];
var fadeout_ticks = 65536.0 / inst.fadeout;
if (!(env_vol_type & 2)) { // if there's no sustain point, create one
env_vol_sustain = env_vol.length / 2;
}
env_vol.push(env_end_tick + fadeout_ticks);
env_vol.push(0);
if (inst.fadeout > 0) {
var fadeout_ticks = 65536.0 / inst.fadeout;
env_vol.push(env_end_tick + fadeout_ticks);
env_vol.push(0);
}
inst.env_vol = new Envelope(
env_vol,
env_vol_type,
@ -1098,8 +1100,9 @@ function playXM(arrayBuf) {
env_vol_loop_start,
env_vol_loop_end);
} else {
// create a default envelope w/ fadeout
inst.env_vol = new Envelope([0, 64, fadeout_ticks, 0], 2, 0, 0, 0);
// no envelope, then just make a default full-volume envelope.
// i thought this would use fadeout, but apparently it doesn't.
inst.env_vol = new Envelope([0, 64, 1, 0], 2, 0, 0, 0);
}
if (env_pan_type) {
if (!(env_pan_type & 2)) { // if there's no sustain point, create one