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gst/: Make sure that a bin state change tries to keep the children in sync.

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Original commit message from CVS:
* gst/gstbin.c: (set_kid_state_func), (gst_bin_set_state):
* gst/gstthread.c: (gst_thread_release), (gst_thread_set_state):
Make sure that a bin state change tries to keep the children
in sync.
Added debug logging to the thread.
This commit is contained in:
Wim Taymans 2004-07-28 10:15:08 +00:00
parent a98e57cb8e
commit f200c14dff
3 changed files with 93 additions and 14 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2004-07-28 Wim Taymans <wim@fluendo.com>
* gst/gstbin.c: (set_kid_state_func), (gst_bin_set_state):
* gst/gstthread.c: (gst_thread_release), (gst_thread_set_state):
Make sure that a bin state change tries to keep the children
in sync.
Added debug logging to the thread.
2004-07-27 Steve Lhomme <steve.lhomme@free.fr>
* win32/GStreamer.vcproj:

96
gst/gstbin.c
View file

@ -793,6 +793,7 @@ gst_bin_foreach (GstBin * bin, GstBinForeachFunc func, gpointer data)
typedef struct
{
GstElementState intermediate;
GstElementState pending;
GstElementStateReturn result;
}
@ -810,17 +811,49 @@ set_kid_state_func (GstBin * bin, GstElement * child, gpointer user_data)
old_child_state = GST_STATE (child);
GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, bin,
"changing state of child %s from current %s to pending %s",
GST_ELEMENT_NAME (child), gst_element_state_get_name (old_child_state),
gst_element_state_get_name (data->pending));
/* are we moving up or down? */
if (data->intermediate < data->pending) {
/* up, check if we are already closer to target */
if (old_child_state >= data->intermediate &&
old_child_state < data->pending) {
GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, bin,
"state of child %s is %s, inbetween intermediate %s and pending %s",
GST_ELEMENT_NAME (child),
gst_element_state_get_name (old_child_state),
gst_element_state_get_name (data->intermediate),
gst_element_state_get_name (data->pending));
return TRUE;
}
} else if (data->intermediate > data->pending) {
/* down, check if we are already closer to target */
if (old_child_state < data->intermediate) {
GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, bin,
"state of child %s is %s, inbetween intermediate %s and pending %s",
GST_ELEMENT_NAME (child),
gst_element_state_get_name (old_child_state),
gst_element_state_get_name (data->intermediate),
gst_element_state_get_name (data->pending));
return TRUE;
}
} else {
/* same state */
GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, bin,
"setting final state on child %s, now in %s, going to %s",
GST_ELEMENT_NAME (child), gst_element_state_get_name (old_child_state),
gst_element_state_get_name (data->intermediate));
}
switch (gst_element_set_state (child, data->pending)) {
GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, bin,
"changing state of child %s from current %s to intermediate %s",
GST_ELEMENT_NAME (child), gst_element_state_get_name (old_child_state),
gst_element_state_get_name (data->intermediate));
switch (gst_element_set_state (child, data->intermediate)) {
case GST_STATE_FAILURE:
GST_CAT_INFO_OBJECT (GST_CAT_STATES, bin,
"child '%s' failed to go to state %d(%s)",
GST_ELEMENT_NAME (child),
data->pending, gst_element_state_get_name (data->pending));
data->intermediate, gst_element_state_get_name (data->intermediate));
gst_element_set_state (child, old_child_state);
return FALSE; /* error out to the caller */
@ -834,8 +867,8 @@ set_kid_state_func (GstBin * bin, GstElement * child, gpointer user_data)
case GST_STATE_SUCCESS:
GST_CAT_DEBUG (GST_CAT_STATES,
"child '%s' changed state to %d(%s) successfully",
GST_ELEMENT_NAME (child), data->pending,
gst_element_state_get_name (data->pending));
GST_ELEMENT_NAME (child), data->intermediate,
gst_element_state_get_name (data->intermediate));
data->result = GST_STATE_SUCCESS;
return TRUE;
@ -850,14 +883,49 @@ gst_bin_set_state (GstElement * element, GstElementState state)
{
GstBin *bin = GST_BIN (element);
SetKidStateData data;
GstElementStateReturn ret = GST_STATE_FAILURE;
GstElementState intermediate;
GstElementState pending;
data.pending = state;
data.result = GST_STATE_ASYNC;
if (!gst_bin_foreach (bin, set_kid_state_func, &data)) {
return GST_STATE_FAILURE;
} else {
return data.result;
/* we start with the state of the bin */
intermediate = GST_STATE (element);
pending = state;
GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, bin,
"setting state of bin %s from current %s to pending %s",
GST_ELEMENT_NAME (element), gst_element_state_get_name (intermediate),
gst_element_state_get_name (pending));
do {
data.intermediate = intermediate;
data.pending = pending;
data.result = GST_STATE_ASYNC;
GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, bin,
"setting state of children to intermediate %s",
gst_element_state_get_name (intermediate));
if (!gst_bin_foreach (bin, set_kid_state_func, &data)) {
ret = GST_STATE_FAILURE;
/* break out of the loop after failure */
break;
} else {
ret = data.result;
}
/* if we have reached the target state, we can stop */
if (intermediate == pending)
break;
/* move intermediate state closer to target state */
if (intermediate < pending)
intermediate <<= 1;
else
intermediate >>= 1;
}
while (TRUE);
return ret;
}
static GstElementStateReturn

3
gst/gstthread.c
View file

@ -406,6 +406,7 @@ static void
gst_thread_release (GstThread * thread)
{
if (thread != gst_thread_get_current ()) {
GST_DEBUG_OBJECT (thread, "releasing lock");
g_cond_signal (thread->cond);
g_mutex_unlock (thread->lock);
}
@ -419,12 +420,14 @@ gst_thread_set_state (GstElement * element, GstElementState state)
if (thread != gst_thread_get_current ()) {
gst_thread_catch (thread);
GST_DEBUG_OBJECT (thread, "releasing lock");
g_mutex_unlock (thread->lock);
}
result =
GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS, set_state, (element,
state), GST_STATE_FAILURE);
if (thread != gst_thread_get_current ()) {
GST_DEBUG_OBJECT (thread, "grabbing lock");
g_mutex_lock (thread->lock);
gst_thread_release (thread);
}