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control: improve UMP to Midi conversiom

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Improve the spa_ump_to_midi function so that it can consume multiple UMP
messages and produce multiple midi messages.

Some UMP messages (like program changes) need to be translated into up
to 3 midi messages. Do this byt adding a state to the function and by
making it consume the input bytes, just like the spa_ump_from_midi
function.

Adapt code to this new world. This is a little API break..
This commit is contained in:
Wim Taymans 2025-08-19 17:41:03 +02:00
parent bf10458604
commit e35a8554f8
13 changed files with 307 additions and 228 deletions
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35
src/modules/module-jack-tunnel.c
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@ -273,29 +273,34 @@ static void midi_to_jack(struct impl *impl, float *dst, float *src, uint32_t n_s
while (spa_pod_parser_get_control_body(&parser, &c, &c_body) >= 0) {
int size;
size_t c_size = c.value.size;
uint64_t state = 0;
if (c.type != SPA_CONTROL_UMP)
continue;
size = spa_ump_to_midi(c_body, c.value.size, &tmp[tmp_size], sizeof(tmp) - tmp_size);
if (size <= 0)
continue;
while (c_size > 0) {
size = spa_ump_to_midi((const uint32_t**)&c_body, &c_size,
&tmp[tmp_size], sizeof(tmp) - tmp_size, &state);
if (size <= 0)
break;
if (impl->fix_midi)
fix_midi_event(&tmp[tmp_size], size);
if (impl->fix_midi)
fix_midi_event(&tmp[tmp_size], size);
if (!in_sysex && tmp[tmp_size] == 0xf0)
in_sysex = true;
if (!in_sysex && tmp[tmp_size] == 0xf0)
in_sysex = true;
tmp_size += size;
if (in_sysex && tmp[tmp_size-1] == 0xf7)
in_sysex = false;
tmp_size += size;
if (in_sysex && tmp[tmp_size-1] == 0xf7)
in_sysex = false;
if (!in_sysex) {
if ((res = jack.midi_event_write(dst, c.offset, tmp, tmp_size)) < 0)
pw_log_warn("midi %p: can't write event: %s", dst,
spa_strerror(res));
tmp_size = 0;
if (!in_sysex) {
if ((res = jack.midi_event_write(dst, c.offset, tmp, tmp_size)) < 0)
pw_log_warn("midi %p: can't write event: %s", dst,
spa_strerror(res));
tmp_size = 0;
}
}
}
}