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impl-node: start driver node after followers completed

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Wait for all pending Start commands from the followers to complete
before adding and starting the driver node.

This ensure that all links are set up and the nodes have received and
replied to the Start command and things can start without hickups.
This commit is contained in:
Wim Taymans 2022-12-03 20:38:26 +01:00
parent a5f23224d1
commit dd420934ce
1 changed files with 13 additions and 4 deletions
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17
src/pipewire/impl-node.c
View file

@ -273,6 +273,10 @@ static int start_node(struct pw_impl_node *this)
impl->pending_play = true;
res = spa_node_send_command(this->node,
&SPA_NODE_COMMAND_INIT(SPA_NODE_COMMAND_Start));
} else {
/* driver nodes will wait until all other nodes are started before
* they are started */
res = EBUSY;
}
if (res < 0)
@ -377,10 +381,6 @@ static void node_update_state(struct pw_impl_node *node, enum pw_node_state stat
pw_loop_invoke(node->data_loop, do_node_remove, 1, NULL, 0, true, node);
}
}
if (res >= 0) {
/* now activate the inputs */
node_activate_inputs(node);
}
break;
case PW_NODE_STATE_IDLE:
case PW_NODE_STATE_SUSPENDED:
@ -2163,6 +2163,10 @@ static void on_state_complete(void *obj, void *data, int res, uint32_t seq)
enum pw_node_state state = SPA_PTR_TO_INT(data);
char *error = NULL;
/* driver nodes added -EBUSY. This is then not an error */
if (res == -EBUSY)
res = 0;
impl->pending_id = SPA_ID_INVALID;
impl->pending_play = false;
@ -2250,6 +2254,11 @@ int pw_impl_node_set_state(struct pw_impl_node *node, enum pw_node_state state)
pw_work_queue_cancel(impl->work, node, impl->pending_id);
node->info.state = impl->pending_state;
}
/* driver nodes return EBUSY to add a -EBUSY to the work queue. This
* will wait until all previous items in the work queue are
* completed */
if (res == EBUSY)
res = -res;
impl->pending_state = state;
impl->pending_id = pw_work_queue_add(impl->work,
node, res, on_state_complete, SPA_INT_TO_PTR(state));