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pw-cat: split SysEx over multiple packets

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Use the same method as RTP Midi to split long SysEx messages into chunks
that we can then put into buffers and reassemble again later.
This commit is contained in:
Wim Taymans 2026-05-20 16:08:04 +02:00
parent 4e389940e8
commit 87a2ae2f15
2 changed files with 65 additions and 4 deletions
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42
src/tools/pw-cat.c
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@ -185,6 +185,7 @@ struct data {
struct {
FILE *file;
bool close;
bool first;
} sysex;
struct {
FILE *file;
@ -1552,16 +1553,48 @@ static int sysex_play(struct data *d, void *dst, unsigned int n_frames, bool *nu
struct spa_pod_builder b;
struct spa_pod_frame f;
size_t size, to_read = n_frames - 64;
uint8_t bytes[to_read];
uint8_t data[to_read+2], *bytes;
bytes = &data[1];
size = fread(bytes, 1, to_read, d->sysex.file);
if (size != to_read) {
if (ferror(d->sysex.file))
return -EIO;
}
if (feof(d->sysex.file)) {
if (size == 0)
return 0;
if (bytes[size-1] != 0xf7) {
bytes[size] = 0xf7;
size += 1;
}
} else {
if (bytes[size-1] != 0xf0) {
bytes[size] = 0xf0;
size += 1;
}
}
if (d->sysex.first) {
if (bytes[0] != 0xf0) {
bytes = &data[0];
bytes[0] = 0xf0;
size += 1;
}
d->sysex.first = false;
} else {
if (bytes[0] != 0xf7) {
bytes = &data[0];
bytes[0] = 0xf7;
size += 1;
}
}
spa_zero(b);
spa_pod_builder_init(&b, dst, n_frames);
spa_pod_builder_push_sequence(&b, &f, 0);
spa_pod_builder_control(&b, 0, SPA_CONTROL_Midi);
size = fread(bytes, 1, to_read, d->sysex.file);
spa_pod_builder_bytes(&b, bytes, size);
spa_pod_builder_pop(&b, &f);
@ -1590,6 +1623,7 @@ static int setup_sysex(struct data *data)
data->fill = sysex_play;
data->stride = 1;
data->sysex.first = true;
return 0;
}