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gst/schedulers/gstoptimalscheduler.c: move isolated groups to a new chain.

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Original commit message from CVS:
* gst/schedulers/gstoptimalscheduler.c: (create_group),
(add_to_group), (merge_groups), (schedule_group),
(gst_opt_scheduler_get_wrapper), (group_elements),
(group_dec_link), (gst_opt_scheduler_pad_link),
(group_migrate_connected), (gst_opt_scheduler_pad_unlink),
(gst_opt_scheduler_iterate):
move isolated groups to a new chain.
Emit a warning instead of segfaulting in some error cases.
Fix a bug where the link count between groups was not calculated
correctly. Fixes #144510.
This commit is contained in:
Wim Taymans 2004-07-14 14:25:04 +00:00
parent 8812f880f5
commit b997eae215
2 changed files with 67 additions and 24 deletions
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13
ChangeLog
View file

@ -1,3 +1,16 @@
2004-07-14 Wim Taymans <wim@fluendo.com>
* gst/schedulers/gstoptimalscheduler.c: (create_group),
(add_to_group), (merge_groups), (schedule_group),
(gst_opt_scheduler_get_wrapper), (group_elements),
(group_dec_link), (gst_opt_scheduler_pad_link),
(group_migrate_connected), (gst_opt_scheduler_pad_unlink),
(gst_opt_scheduler_iterate):
move isolated groups to a new chain.
Emit a warning instead of segfaulting in some error cases.
Fix a bug where the link count between groups was not calculated
correctly. Fixes #144510.
2004-07-13 Steve Lhomme <steve.lhomme@free.fr>
* gst/elements/gstfilesrc.c:
Binary files support under Windows now OK

78
gst/schedulers/gstoptimalscheduler.c
View file

@ -215,7 +215,7 @@ static GstOptSchedulerGroup *create_group (GstOptSchedulerChain * chain,
GstElement * element, GstOptSchedulerGroupType type);
static void destroy_group (GstOptSchedulerGroup * group);
static GstOptSchedulerGroup *add_to_group (GstOptSchedulerGroup * group,
GstElement * element, gboolean with_links);
GstElement * element);
static GstOptSchedulerGroup *remove_from_group (GstOptSchedulerGroup * group,
GstElement * element);
static void group_dec_links_for_element (GstOptSchedulerGroup * group,
@ -822,7 +822,7 @@ create_group (GstOptSchedulerChain * chain, GstElement * element,
group->flags = GST_OPT_SCHEDULER_GROUP_DISABLED;
group->type = type;
add_to_group (group, element, TRUE);
add_to_group (group, element);
add_to_chain (chain, group);
group = unref_group (group); /* ...and sink. */
@ -848,8 +848,7 @@ destroy_group (GstOptSchedulerGroup * group)
}
static GstOptSchedulerGroup *
add_to_group (GstOptSchedulerGroup * group, GstElement * element,
gboolean with_links)
add_to_group (GstOptSchedulerGroup * group, GstElement * element)
{
g_assert (group != NULL);
g_assert (element != NULL);
@ -867,8 +866,7 @@ add_to_group (GstOptSchedulerGroup * group, GstElement * element,
/* first increment the links that this group has with other groups through
* this element */
if (with_links)
group_inc_links_for_element (group, element);
group_inc_links_for_element (group, element);
/* Ref the group... */
GST_ELEMENT_SCHED_GROUP (element) = ref_group (group);
@ -945,7 +943,7 @@ merge_groups (GstOptSchedulerGroup * group1, GstOptSchedulerGroup * group2)
GstElement *element = (GstElement *) group2->elements->data;
group2 = remove_from_group (group2, element);
add_to_group (group1, element, TRUE);
add_to_group (group1, element);
}
return group1;
@ -1086,6 +1084,9 @@ schedule_group (GstOptSchedulerGroup * group)
{
if (!group->entry) {
GST_INFO ("not scheduling group %p without entry", group);
/* FIXME, we return true here, while the group is actually
* not schedulable. We might want to disable the element that caused
* this group to be scheduled instead */
return TRUE;
}
#ifdef USE_COTHREADS
@ -1366,9 +1367,16 @@ gst_opt_scheduler_get_wrapper (GstPad * srcpad)
return data;
}
GST_LOG ("need to schedule the peer element");
/* else we need to schedule the peer element */
group = GST_ELEMENT_SCHED_GROUP (GST_PAD_PARENT (srcpad));
if (group == NULL) {
/* wow, peer has no group */
g_warning ("peer without group detected");
//group_error_handler (group);
return GST_DATA (gst_event_new (GST_EVENT_INTERRUPT));
}
osched = group->chain->sched;
data = NULL;
disabled = FALSE;
@ -1591,7 +1599,7 @@ group_elements (GstOptScheduler * osched, GstElement * element1,
chain = create_chain (osched);
group = create_group (chain, element1, type);
add_to_group (group, element2, TRUE);
add_to_group (group, element2);
}
/* the first element has a group */
else if (group1) {
@ -1604,7 +1612,7 @@ group_elements (GstOptScheduler * osched, GstElement * element1,
/* the second element has no group, add it to the group
* of the first element */
else
add_to_group (group1, element2, TRUE);
add_to_group (group1, element2);
group = group1;
}
@ -1613,7 +1621,7 @@ group_elements (GstOptScheduler * osched, GstElement * element1,
else {
GST_DEBUG ("adding \"%s\" to \"%s\"'s group",
GST_ELEMENT_NAME (element1), GST_ELEMENT_NAME (element2));
add_to_group (group2, element1, TRUE);
add_to_group (group2, element1);
group = group2;
}
return group;
@ -1680,10 +1688,29 @@ group_dec_link (GstOptSchedulerGroup * group1, GstOptSchedulerGroup * group2)
GST_LOG ("link count between %p and %p is now %d",
group1, group2, link->count);
if (link->count == 0) {
GstOptSchedulerGroup *iso_group = NULL;
group1->group_links = g_slist_remove (group1->group_links, link);
group2->group_links = g_slist_remove (group2->group_links, link);
g_free (link);
GST_DEBUG ("removed group link between %p and %p", group1, group2);
if (group1->group_links == NULL) {
/* group1 has no more links with other groups */
iso_group = group1;
} else if (group2->group_links == NULL) {
/* group2 has no more links with other groups */
iso_group = group2;
}
if (iso_group) {
GstOptSchedulerChain *chain;
GST_DEBUG ("group %p has become isolated, moving to new chain",
iso_group);
chain = create_chain (iso_group->chain->sched);
remove_from_chain (iso_group->chain, iso_group);
add_to_chain (chain, iso_group);
}
res = TRUE;
}
break;
@ -2023,7 +2050,8 @@ gst_opt_scheduler_pad_link (GstScheduler * sched, GstPad * srcpad,
* group1 only exists if src_element is linked to some other element */
if (!group1) {
/* create a new group for src_element as it cannot be merged into another group
* here. we create the group in the same chain as the loop-based element. */
* here. we create the group in the same chain as the loop-based element. note
* that creating a new group will also increment the links with other groups */
GST_DEBUG ("creating new group for element %s",
GST_ELEMENT_NAME (src_element));
group1 =
@ -2033,8 +2061,9 @@ gst_opt_scheduler_pad_link (GstScheduler * sched, GstPad * srcpad,
/* both elements are already in a group, make sure they are added to
* the same chain */
merge_chains (group1->chain, group2->chain);
/* increment the group link counters */
group_inc_link (group1, group2);
}
group_inc_link (group1, group2);
break;
}
case GST_OPT_INVALID:
@ -2306,16 +2335,26 @@ group_migrate_connected (GstOptScheduler * osched, GstElement * element,
for (c = connected; c; c = g_list_next (c)) {
GstElement *element = GST_ELEMENT (c->data);
remove_from_group (group, element);
group = remove_from_group (group, element);
if (new_group == NULL) {
new_group =
create_group (chain, element, GST_OPT_SCHEDULER_GROUP_UNKNOWN);
} else {
add_to_group (new_group, element, TRUE);
add_to_group (new_group, element);
}
}
g_list_free (connected);
/* remove last element from the group if any. Make sure not to remove
* the loop based entry point of a group as this always needs one group */
if (group != NULL) {
if (g_slist_length (group->elements) == 1 &&
group->type != GST_OPT_SCHEDULER_GROUP_LOOP) {
GST_LOG ("removing last element from group");
group = remove_from_group (group, GST_ELEMENT (group->elements->data));
}
}
/* at this point the new group lives in its own chain but might
* have to be merged with another chain, this happens when the new
* group has a link with another group in another chain */
@ -2437,14 +2476,7 @@ gst_opt_scheduler_pad_unlink (GstScheduler * sched,
}
g_list_free (reachables);
}
/* see if the old group is worthy of existance, loop based groups can hold
* one element */
if (g_slist_length (group->elements) == 1 &&
group->type != GST_OPT_SCHEDULER_GROUP_LOOP) {
GST_LOG ("removing last element from group");
remove_from_group (group, GST_ELEMENT (group->elements->data));
}
/* at this point the group can be freed and gone, so don't touch */
}
}
@ -2458,8 +2490,6 @@ gst_opt_scheduler_iterate (GstScheduler * sched)
osched->state = GST_OPT_SCHEDULER_STATE_RUNNING;
//gst_opt_scheduler_show (sched);
GST_DEBUG_OBJECT (sched, "iterating");
while (iterations) {