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alsa-seq: unsubscribe when paused/suspended

Browse source 
When we are suspended or paused, unsubscribe from the ports so that
we don't block the hardware devices.

See #225
This commit is contained in:
Wim Taymans 2020-03-31 12:14:52 +02:00
parent 9b24a84ce6
commit e6675ff2a8
3 changed files with 58 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

59
spa/plugins/alsa/alsa-seq.c
View file

@ -376,6 +376,48 @@ static struct seq_port *find_port(struct seq_state *state,
return NULL;
}
int spa_alsa_seq_activate_port(struct seq_state *state, struct seq_port *port, bool active)
{
int res;
snd_seq_port_subscribe_t* sub;
spa_log_debug(state->log, "activate: %d.%d: started:%d active:%d wanted:%d",
port->addr.client, port->addr.port, state->started, port->active, active);
if (active && !state->started)
return 0;
if (port->active == active)
return 0;
snd_seq_port_subscribe_alloca(&sub);
if (port->direction == SPA_DIRECTION_OUTPUT) {
snd_seq_port_subscribe_set_sender(sub, &port->addr);
snd_seq_port_subscribe_set_dest(sub, &state->event.addr);
} else {
snd_seq_port_subscribe_set_sender(sub, &state->event.addr);
snd_seq_port_subscribe_set_dest(sub, &port->addr);
}
if (active) {
snd_seq_port_subscribe_set_time_update(sub, 1);
snd_seq_port_subscribe_set_time_real(sub, 1);
snd_seq_port_subscribe_set_queue(sub, state->event.queue_id);
if ((res = snd_seq_subscribe_port(state->event.hndl, sub)) < 0) {
spa_log_error(state->log, "can't subscribe to %d:%d - %s",
port->addr.client, port->addr.port, snd_strerror(res));
active = false;
}
} else {
if ((res = snd_seq_unsubscribe_port(state->event.hndl, sub)) < 0) {
spa_log_warn(state->log, "can't unsubscribe from %d:%d - %s",
port->addr.client, port->addr.port, snd_strerror(res));
}
}
spa_log_info(state->log, "activate: %d.%d: %d", port->addr.client, port->addr.port, active);
port->active = active;
return res;
}
static struct buffer *peek_buffer(struct seq_state *state,
struct seq_port *port)
{
@ -774,13 +816,15 @@ static void reset_buffers(struct seq_state *this, struct seq_port *port)
}
}
}
static void reset_stream(struct seq_state *this, struct seq_stream *stream)
static void reset_stream(struct seq_state *this, struct seq_stream *stream, bool active)
{
uint32_t i;
for (i = 0; i < MAX_PORTS; i++) {
struct seq_port *port = &stream->ports[i];
if (port->valid)
if (port->valid) {
reset_buffers(this, port);
spa_alsa_seq_activate_port(this, port, active);
}
}
}
@ -825,8 +869,10 @@ int spa_alsa_seq_start(struct seq_state *state)
state->threshold = state->duration;
}
reset_stream(state, &state->streams[SPA_DIRECTION_INPUT]);
reset_stream(state, &state->streams[SPA_DIRECTION_OUTPUT]);
state->started = true;
reset_stream(state, &state->streams[SPA_DIRECTION_INPUT], true);
reset_stream(state, &state->streams[SPA_DIRECTION_OUTPUT], true);
state->source.func = alsa_on_timeout_event;
state->source.data = state;
@ -839,8 +885,6 @@ int spa_alsa_seq_start(struct seq_state *state)
init_loop(state);
set_timers(state);
state->started = true;
return 0;
}
@ -900,5 +944,8 @@ int spa_alsa_seq_pause(struct seq_state *state)
state->started = false;
reset_stream(state, &state->streams[SPA_DIRECTION_INPUT], false);
reset_stream(state, &state->streams[SPA_DIRECTION_OUTPUT], false);
return 0;
}