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impl-node: Expose driver id in node.props

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Makes it easier for clients to track what the current driver of a node
is.
This commit is contained in:
Arun Raghavan 2024-05-14 11:43:56 -04:00 committed by Arun Raghavan
parent 78fbe6f750
commit db365ac855
2 changed files with 16 additions and 2 deletions
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16
src/pipewire/impl-node.c
View file

@ -991,9 +991,9 @@ int pw_impl_node_set_driver(struct pw_impl_node *node, struct pw_impl_node *driv
{
struct impl *impl = SPA_CONTAINER_OF(node, struct impl, this);
struct pw_impl_node *old = node->driver_node;
bool was_driving;
bool was_driving, no_driver = (driver == NULL);
if (driver == NULL)
if (no_driver)
driver = node;
spa_list_remove(&node->follower_link);
@ -1033,6 +1033,18 @@ int pw_impl_node_set_driver(struct pw_impl_node *node, struct pw_impl_node *driv
pw_impl_node_emit_peer_removed(old, node);
pw_impl_node_emit_peer_added(driver, node);
if (no_driver) {
/* We don't have a driver, so remove the property */
pw_properties_set(node->properties, PW_KEY_NODE_DRIVER_ID, NULL);
} else if (node->driver_node->global) {
/* Expose the driver ID if it is available as a global */
pw_properties_setf(node->properties, PW_KEY_NODE_DRIVER_ID, "%u",
pw_global_get_id(node->driver_node->global));
}
node->info.change_mask |= PW_NODE_CHANGE_MASK_PROPS;
pw_impl_node_emit_info_changed(driver, &node->info);
return 0;
}

2
src/pipewire/keys.h
View file

@ -191,6 +191,8 @@ extern "C" {
#define PW_KEY_NODE_CACHE_PARAMS "node.cache-params" /**< cache the node params */
#define PW_KEY_NODE_TRANSPORT_SYNC "node.transport.sync" /**< the node handles transport sync */
#define PW_KEY_NODE_DRIVER "node.driver" /**< node can drive the graph */
#define PW_KEY_NODE_DRIVER_ID "node.driver-id" /**< the node id of the node assigned as driver
* for this node */
#define PW_KEY_NODE_ASYNC "node.async" /**< the node wants async scheduling */
#define PW_KEY_NODE_LOOP_NAME "node.loop.name" /**< the loop name fnmatch pattern to run in */
#define PW_KEY_NODE_LOOP_CLASS "node.loop.class" /**< the loop class fnmatch pattern to run in */