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mixer-dsp: fade-in/out on xrun as well

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When there is no input buffer because of an xrun or the io was removed,
ramp down the signal. Only remove the port from the mix list when the io
was removed, otherwise, ramp back up when there is a buffers on the
input again.

This avoids pops and click around xrun nodes.
This commit is contained in:
Wim Taymans 2026-06-18 11:06:44 +02:00
parent b6fc57a299
commit 377bab0430
1 changed files with 5 additions and 2 deletions
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7
spa/plugins/audiomixer/mixer-dsp.c
View file

@ -87,6 +87,7 @@ struct port {
struct spa_list mix_link;
bool active:1;
bool removing:1;
uint32_t ramp_pos;
float history[1];
};
@ -750,6 +751,7 @@ static int do_port_set_io(struct spa_loop *loop, bool async, uint32_t seq,
if (info->data == NULL || info->size < sizeof(struct spa_io_buffers)) {
port->io[0] = NULL;
port->io[1] = NULL;
port->removing = true;
port->ramp_pos = impl->n_curve;
} else {
if (info->size >= sizeof(struct spa_io_async_buffers)) {
@ -760,6 +762,7 @@ static int do_port_set_io(struct spa_loop *loop, bool async, uint32_t seq,
port->io[0] = info->data;
port->io[1] = info->data;
}
port->removing = false;
port->ramp_pos = 0;
if (port->direction == SPA_DIRECTION_INPUT && !port->active) {
spa_list_append(&info->impl->mix_list, &port->mix_link);
@ -843,7 +846,7 @@ static void ramp_down(struct impl *this, float *dst, uint32_t size, struct ramp_
for (c = port->ramp_pos, i = 0; i < size && c > 0; i++, c--)
dst[i] += last_sample * this->curve[c-1];
port->ramp_pos = c;
if (c == 0 && port->active) {
if (c == 0 && port->active && port->removing) {
spa_list_remove(&port->mix_link);
port->active = false;
}
@ -933,7 +936,7 @@ static int impl_node_process(void *object)
if (size >= sizeof(float))
inport->history[0] = s[size/sizeof(float)-1];
inio->status = SPA_STATUS_NEED_DATA;
} else if (inio == NULL) {
} else if (inport->ramp_pos > 0) {
/* removed port, ramp down */
struct ramp_info *ri = &ramps[n_ramps++];
ri->port = inport;