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Fix OctaMED 'tracker compatibility' tempos.

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This commit is contained in:
AliceLR
2020-10-25 23:03:14 -06:00
committed by Ozkan Sezer
parent 7d6d824354
commit 29b5d06f60
1 changed files with 30 additions and 22 deletions
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52
src/loaders/mmd_common.c
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@@ -44,18 +44,35 @@ const char *const mmd_inst_type[] = {
};
#endif
static int get_8ch_tempo(int tempo)
static int mmd_convert_tempo(int tempo, int bpm_on, int med_8ch)
{
const int tempos[10] = {
const int tempos_compat[10] = {
195, 97, 65, 49, 39, 32, 28, 24, 22, 20
};
const int tempos_8ch[10] = {
47, 43, 40, 37, 35, 32, 30, 29, 27, 26
};
if (tempo > 0) {
tempo = tempo > 10 ? 10 : tempo;
return tempos[tempo-1];
} else {
return tempo;
/* From the OctaMEDv4 documentation:
*
* In 8-channel mode, you can control the playing speed more
* accurately (to techies: by changing the size of the mix buffer).
* This can be done with the left tempo gadget (values 1-10; the
* lower, the faster). Values 11-240 are equivalent to 10.
*/
if (med_8ch) {
tempo = tempo > 10 ? 10 : tempo;
return tempos_8ch[tempo-1];
}
/* Tempos 1-10 in tempo mode are compatibility tempos that
* approximate Soundtracker speeds.
*/
if (tempo <= 10 && !bpm_on) {
return tempos_compat[tempo-1];
}
}
return tempo;
}
void mmd_xlat_fx(struct xmp_event *event, int bpm_on, int bpmlen, int med_8ch,
@@ -184,7 +201,7 @@ void mmd_xlat_fx(struct xmp_event *event, int bpm_on, int bpmlen, int med_8ch,
break;
} else if (event->fxp <= 0xf0) {
event->fxt = FX_S3M_BPM;
event->fxp = med_8ch ? get_8ch_tempo(event->fxp) : event->fxp;
event->fxp = mmd_convert_tempo(event->fxp, bpm_on, med_8ch);
break;
} else switch (event->fxp) {
case 0xf1: /* Play note twice */
@@ -712,22 +729,13 @@ void mmd_set_bpm(struct module_data *m, int med_8ch, int deftempo,
{
struct xmp_module *mod = &m->mod;
/* From the OctaMEDv4 documentation:
*
* In 8-channel mode, you can control the playing speed more
* accurately (to techies: by changing the size of the mix buffer).
* This can be done with the left tempo gadget (values 1-10; the
* lower, the faster). Values 11-240 are equivalent to 10.
mod->bpm = mmd_convert_tempo(deftempo, bpm_on, med_8ch);
/* 8-channel mode completely overrides BPM mode timing.
* See mmd_convert_tempo for more info.
*/
if (med_8ch) {
mod->bpm = get_8ch_tempo(deftempo);
} else {
mod->bpm = deftempo;
if (bpm_on) {
m->time_factor = DEFAULT_TIME_FACTOR * 4 / bpmlen;
}
if (bpm_on && !med_8ch) {
m->time_factor = DEFAULT_TIME_FACTOR * 4 / bpmlen;
}
}