tools: print async node state in pw-top

Pass the node async state in the profiler and use this in pw-top to draw
the node with = instead of a + in the tree when it's async.

doc/dox/programs/pw-top.1.md

@@ -14,7 +14,7 @@ node and device statistics.
 A hierarchical view is shown of Driver nodes and follower nodes. The
 Driver nodes are actively using a timer to schedule dataflow in the
 followers. The followers of a driver node as shown below their driver
-with a + sign in a tree-like representation.
+with a + sign (or = for async nodes) in a tree-like representation.
 
 The columns presented are as follows:
 
@@ -173,8 +173,8 @@ For Video formats, the layout is \<pixelformat\>
 \parblock
 Name assigned to the device/node, as found in *pw-dump* node.name
 
-Names are prefixed by *+* when they are linked to a driver (entry
-above with no +)
+Names are prefixed by *+*/*=* when they are linked to a driver (entry
+above with no +/=)
 \endparblock
 
 # COMMANDS

spa/include/spa/param/profiler.h

@@ -66,7 +66,8 @@ enum spa_profiler {
 							  *      Long : finish,
 							  *      Int : status,
 							  *      Fraction : latency,
-							  *      Int : xrun_count))  */
+							  *      Int : xrun_count))
+							  *      Bool : async))  */
 	SPA_PROFILER_followerClock,			/**< follower clock information
 							  *  (Struct(
 							  *      Int : clock id,

src/modules/module-profiler.c

@@ -298,7 +298,8 @@ static void context_do_profile(void *data)
 			SPA_POD_Long(n->async ? na->prev_finish_time : na->finish_time),
 			SPA_POD_Int(na->status),
 			SPA_POD_Fraction(&latency),
-			SPA_POD_Int(na->xrun_count));
+			SPA_POD_Int(na->xrun_count),
+			SPA_POD_Bool(n->async));
 
 		if (n->driver) {
 			spa_pod_builder_prop(&b, SPA_PROFILER_followerClock, 0);

src/tools/pw-top.c

@@ -44,6 +44,7 @@ struct measurement {
 	int64_t finish;
 	struct spa_fraction latency;
 	uint32_t xrun_count;
+	bool async;
 };
 
 struct node {
@@ -419,7 +420,8 @@ static int process_follower_block(struct data *d, const struct spa_pod *pod, str
 			SPA_POD_Long(&m.finish),
 			SPA_POD_Int(&m.status),
 			SPA_POD_Fraction(&m.latency),
-			SPA_POD_OPT_Int(&m.xrun_count))) < 0)
+			SPA_POD_OPT_Int(&m.xrun_count),
+			SPA_POD_OPT_Bool(&m.async))) < 0)
 		return res;
 
 	if ((n = find_node(d, id)) == NULL)
@@ -540,7 +542,7 @@ static void print_node(struct data *d, struct node *dr, struct node *n, int y)
 					i->xrun_count - dr->info_base :
 					n->measurement.xrun_count - n->measurement_base,
 			active ? n->format : "",
-			n->driver == n ? "" : " + ",
+			n->driver == n ? "" : n->measurement.async ? " = " : " + ",
 			n->name);
 }