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Add -PMAR option to emit MIDI marker meta-events for P: part labels (#16)

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* Add -PMAR option to output `P:` information as MIDI part meta-event

* Update man page and comments

* Add the instance number of a part like `Part T-4`

This allows better tracking of parts played more than once with complex `P:`
header.

* Updated CHANGES file and added author change comments in the code
This commit is contained in:
Ronan Keryell
2026-04-01 04:12:55 -07:00
committed by GitHub
parent 41264221f4
commit c7f4015945
4 changed files with 65 additions and 12 deletions
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35
genmidi.c
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@@ -105,6 +105,7 @@ int gchordbars;
/* Part handling */
extern struct vstring part;
int parts, partno, partlabel;
int partmarkers; /* -PMAR flag: emit MIDI marker meta-events for P: parts [RK] 2026-03-30 */
int part_start[26], part_count[26];
long introlen, lastlen, partlen[26];
int partrepno;
@@ -3123,17 +3124,33 @@ long writetrack(int xtrack)
checksyllables();
};
break;
case PART:
case PART: /* [RK] 2026-03-30 */
in_varend = 0;
/*j = partbreak(xtrack, trackvoice, j); [SS] 2023.01.20 */
j = findvoice(j, trackvoice, xtrack);
if (parts == -1) {
char msg[1];
msg[0] = (char) pitch[j];
mf_write_meta_event(0L, marker, msg, 1);
};
/* No header P: spec, body labels only: emit "Part X" */
if (partmarkers && xtrack == 0 &&
pitch[j] >= 'A' && pitch[j] <= 'Z') {
char msg[8];
snprintf(msg, sizeof(msg), "Part %c", (char) pitch[j]);
mf_write_meta_event(delta_time_track0, marker, msg, strlen(msg));
tracklen = tracklen + delta_time_track0;
delta_time_track0 = 0L;
}
} else {
/* Parts active, navigate then emit "Part X-N" marker
where N is the instance number (1-based) */
/*j = partbreak(xtrack, trackvoice, j); [SS] 2023.01.20 */
j = findvoice(j, trackvoice, xtrack);
if (partmarkers && xtrack == 0 &&
partlabel >= 0 && partlabel < 26) {
char msg[20];
snprintf(msg, sizeof(msg), "Part %c-%d",
(char)(partlabel + 'A'), part_count[partlabel]);
mf_write_meta_event(delta_time_track0, marker, msg, strlen(msg));
tracklen = tracklen + delta_time_track0;
delta_time_track0 = 0L;
}
}
break;
case VOICE:
/* search on for next occurrence of voice */