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jack: improve timemaster install

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When we get the driver activation try to install ourselves as
timemaster.
This commit is contained in:
Wim Taymans 2020-02-24 15:38:21 +01:00
parent 41989f4889
commit cde7fa797c
1 changed files with 44 additions and 22 deletions
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66
pipewire-jack/src/pipewire-jack.c
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@ -325,6 +325,8 @@ struct client {
unsigned int thread_entered:1;
unsigned int has_transport:1;
unsigned int allow_mlock:1;
unsigned int timemaster_pending:1;
unsigned int timemaster_conditional:1;
jack_position_t jack_position;
jack_transport_state_t jack_state;
@ -1172,6 +1174,40 @@ static int client_node_set_param(void *object,
return -ENOTSUP;
}
static int install_timemaster(struct client *c)
{
struct pw_node_activation *a;
uint32_t owner;
if (!c->timemaster_pending)
return 0;
if ((a = c->driver_activation) == NULL)
return -EIO;
pw_log_debug(NAME" %p: activation %p", c, a);
/* was ok */
owner = ATOMIC_LOAD(a->segment_owner[0]);
if (owner == c->node_id)
return 0;
/* try to become master */
if (c->timemaster_conditional) {
if (!ATOMIC_CAS(a->segment_owner[0], 0, c->node_id)) {
pw_log_debug(NAME" %p: owner:%u id:%u", c, owner, c->node_id);
return -EBUSY;
}
} else {
ATOMIC_STORE(a->segment_owner[0], c->node_id);
}
pw_log_debug(NAME" %p: timebase installed for id:%u", c, c->node_id);
c->timemaster_pending = false;
return 0;
}
static int update_driver_activation(struct client *c)
{
struct link *link;
@ -1179,6 +1215,9 @@ static int update_driver_activation(struct client *c)
link = find_activation(&c->links, c->driver_id);
c->driver_activation = link ? link->activation : NULL;
install_timemaster(c);
return 0;
}
@ -4113,6 +4152,7 @@ int jack_release_timebase (jack_client_t *client)
c->timebase_callback = NULL;
c->timebase_arg = NULL;
c->activation->pending_new_pos = false;
c->timemaster_pending = false;
return 0;
}
@ -4162,33 +4202,15 @@ int jack_set_timebase_callback (jack_client_t *client,
{
int res;
struct client *c = (struct client *) client;
struct pw_node_activation *a;
uint32_t owner;
spa_return_val_if_fail(c != NULL, -EINVAL);
if ((a = c->driver_activation) == NULL)
return -EIO;
pw_log_debug(NAME" %p: activation %p", c, a);
/* was ok */
owner = ATOMIC_LOAD(a->segment_owner[0]);
if (owner == c->node_id)
return 0;
/* try to become master */
if (conditional) {
if (!ATOMIC_CAS(a->segment_owner[0], 0, c->node_id)) {
pw_log_debug(NAME" %p: owner:%u id:%u", c, owner, c->node_id);
return -EBUSY;
}
} else {
ATOMIC_STORE(a->segment_owner[0], c->node_id);
}
spa_return_val_if_fail(timebase_callback != NULL, -EINVAL);
c->timebase_callback = timebase_callback;
c->timebase_arg = arg;
c->timemaster_pending = true;
c->timemaster_conditional = conditional;
install_timemaster(c);
pw_log_debug(NAME" %p: timebase set id:%u", c, c->node_id);