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node: implement activation

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Make an eventfd for each node and listen for events when the node
is activated.
Reorganize some graphs links to make it possible to activiate nodes
by signaling the eventfd
Pass the peer node to each remote node and let the remote node
directly activate the peer when needed.
Let each node signal the driver node when finished.
With this we don't need to go through the daemon to schedule the
graph, nodes will simply activate eachother. We only go to the
server when there is a server node to schedule.
Keep stats about the state of each node and the time it was
triggered, running and finished.
This commit is contained in:
Wim Taymans 2019-02-12 17:42:33 +01:00
parent f45e0b8966
commit 5de7898808
15 changed files with 470 additions and 173 deletions
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13
src/pipewire/private.h
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@ -318,10 +318,9 @@ struct pw_node_activation {
#define pw_node_events_state_changed(n,o,s,e) pw_node_events_emit(n, state_changed, 0, o, s, e)
#define pw_node_events_async_complete(n,s,r) pw_node_events_emit(n, async_complete, 0, s, r)
#define pw_node_events_event(n,e) pw_node_events_emit(n, event, 0, e)
#define pw_node_events_driver_changed(n,d) pw_node_events_emit(n, driver_changed, 0, d)
#define pw_node_events_process(n) pw_node_events_emit(n, process, 0)
#define pw_node_events_reuse_buffer(n,p,b) pw_node_events_emit(n, reuse_buffer, 0, p, b)
#define pw_node_events_finish(n) pw_node_events_emit(n, finish, 0)
#define pw_node_events_driver_changed(n,o,d) pw_node_events_emit(n, driver_changed, 0, o, d)
#define pw_node_events_peer_added(n,p) pw_node_events_emit(n, peer_added, 0, p)
#define pw_node_events_peer_removed(n,p) pw_node_events_emit(n, peer_removed, 0, p)
struct pw_node {
struct pw_core *core; /**< core object */
@ -346,7 +345,6 @@ struct pw_node {
uint32_t port_user_data_size; /**< extra size for port user data */
struct pw_node *driver_node;
struct pw_node *driver_root;
struct spa_list driver_list;
struct spa_list driver_link;
@ -370,6 +368,8 @@ struct pw_node {
struct pw_loop *data_loop; /**< the data loop for this node */
uint32_t quantum_size; /**< desired quantum */
struct spa_source source; /**< source to remotely trigger this node */
struct pw_memblock *activation;
struct {
struct spa_io_clock *clock; /**< io area of the clock or NULL */
struct spa_io_position *position;
@ -377,8 +377,7 @@ struct pw_node {
struct spa_graph_node root;
struct pw_node_activation *activation;
struct spa_graph_node node;
struct spa_graph_node subnode;
struct spa_graph_link sublink;
struct spa_graph_link driver_link;
} rt;
void *user_data; /**< extra user data */