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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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31
src/modules/module-ffado-driver.c
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@ -345,27 +345,32 @@ static void midi_to_ffado(struct port *p, float *src, uint32_t n_samples)
while (spa_pod_parser_get_control_body(&parser, &c, &c_body) >= 0) {
uint8_t data[16];
int j, 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, data, sizeof(data));
if (size <= 0)
continue;
if (index < c.offset)
index = SPA_ROUND_UP_N(c.offset, 8);
for (j = 0; j < size; j++) {
if (index >= n_samples) {
/* keep events that don't fit for the next cycle */
if (p->event_pos < sizeof(p->event_buffer))
p->event_buffer[p->event_pos++] = data[j];
while (c_size > 0) {
size = spa_ump_to_midi((const uint32_t**)&c_body, &c_size, data, sizeof(data), &state);
if (size <= 0)
break;
for (j = 0; j < size; j++) {
if (index >= n_samples) {
/* keep events that don't fit for the next cycle */
if (p->event_pos < sizeof(p->event_buffer))
p->event_buffer[p->event_pos++] = data[j];
else
unhandled++;
}
else
unhandled++;
dst[index] = 0x01000000 | (uint32_t) data[j];
index += 8;
}
else
dst[index] = 0x01000000 | (uint32_t) data[j];
index += 8;
}
}
if (unhandled > 0)