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pad: more sticky events work

Browse source 
Copy the sticky events from the srcpad to the sinkpad when linking pads. Set the
STICKY_PENDING flag to make sure that the sticky events are dispatched before
pushing the next buffer to the element.
This commit is contained in:
Wim Taymans 2011-05-03 18:58:18 +02:00
parent 9c48af743c
commit bc9cffda90
3 changed files with 71 additions and 13 deletions
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6
gst/gstevent.h
View file

@ -61,8 +61,9 @@ typedef enum {
#define GST_EVENT_TYPE_BOTH \
(GST_EVENT_TYPE_UPSTREAM | GST_EVENT_TYPE_DOWNSTREAM)
#define GST_EVENT_MAX_STICKY 16
#define GST_EVENT_STICKY_SHIFT 8
#define GST_EVENT_NUM_SHIFT 16
#define GST_EVENT_NUM_SHIFT (GST_EVENT_STICKY_SHIFT + 4)
/**
* GST_EVENT_MAKE_TYPE:
@ -78,7 +79,8 @@ typedef enum {
#define FLAG(name) GST_EVENT_TYPE_##name
#define GST_EVENT_STICKY_IDX(ev) ((GST_EVENT_TYPE(ev) >> GST_EVENT_STICKY_SHIFT) & 0xff)
#define GST_EVENT_STICKY_IDX(ev) ((GST_EVENT_TYPE(ev) >> GST_EVENT_STICKY_SHIFT) & 0xf)
/**
* GstEventType:

61
gst/gstpad.c
View file

@ -378,7 +378,7 @@ clear_sticky_events (GstPad * pad)
{
guint i;
for (i = 0; i < 16; i++) {
for (i = 0; i < GST_EVENT_MAX_STICKY; i++) {
GstEvent **eventp = &pad->sticky[i];
gst_event_replace (eventp, NULL);
}
@ -679,6 +679,9 @@ gst_pad_set_active (GstPad * pad, gboolean active)
GST_DEBUG_OBJECT (pad, "activating pad from none");
ret = (GST_PAD_ACTIVATEFUNC (pad)) (pad);
break;
default:
GST_DEBUG_OBJECT (pad, "unknown activation mode!");
break;
}
} else {
switch (old) {
@ -694,6 +697,9 @@ gst_pad_set_active (GstPad * pad, gboolean active)
GST_DEBUG_OBJECT (pad, "deactivating pad from none");
ret = TRUE;
break;
default:
GST_DEBUG_OBJECT (pad, "unknown activation mode!");
break;
}
}
@ -1687,6 +1693,9 @@ gst_pad_unlink (GstPad * srcpad, GstPad * sinkpad)
GST_PAD_PEER (srcpad) = NULL;
GST_PAD_PEER (sinkpad) = NULL;
/* clear the events on the sinkpad */
clear_sticky_events (sinkpad);
GST_OBJECT_UNLOCK (sinkpad);
GST_OBJECT_UNLOCK (srcpad);
@ -2004,6 +2013,7 @@ gst_pad_link_full (GstPad * srcpad, GstPad * sinkpad, GstPadLinkCheck flags)
{
GstPadLinkReturn result;
GstElement *parent;
guint i;
g_return_val_if_fail (GST_IS_PAD (srcpad), GST_PAD_LINK_REFUSED);
g_return_val_if_fail (GST_PAD_IS_SRC (srcpad), GST_PAD_LINK_WRONG_DIRECTION);
@ -2033,6 +2043,15 @@ gst_pad_link_full (GstPad * srcpad, GstPad * sinkpad, GstPadLinkCheck flags)
GST_PAD_PEER (srcpad) = sinkpad;
GST_PAD_PEER (sinkpad) = srcpad;
/* copy the events */
for (i = 0; i < GST_EVENT_MAX_STICKY; i++) {
GstEvent **eventp = &sinkpad->sticky[i], *event;
if ((event = srcpad->sticky[i]))
GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_STICKY_PENDING);
gst_event_replace (eventp, event);
}
GST_OBJECT_UNLOCK (sinkpad);
GST_OBJECT_UNLOCK (srcpad);
@ -3440,6 +3459,7 @@ gst_pad_chain_data_unchecked (GstPad * pad, gboolean is_buffer, void *data,
GST_PAD_STREAM_LOCK (pad);
again:
GST_OBJECT_LOCK (pad);
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
goto flushing;
@ -3448,6 +3468,38 @@ gst_pad_chain_data_unchecked (GstPad * pad, gboolean is_buffer, void *data,
caps_changed = caps && caps != GST_PAD_CAPS (pad);
emit_signal = GST_PAD_DO_BUFFER_SIGNALS (pad) > 0;
if (G_UNLIKELY (GST_PAD_IS_STICKY_PENDING (pad))) {
GstPadEventFunction eventfunc;
if (G_LIKELY ((eventfunc = GST_PAD_EVENTFUNC (pad)))) {
GstEvent *events[GST_EVENT_MAX_STICKY];
GstEvent *event;
guint i;
/* need to make a copy because when we release the object lock, things
* could just change */
for (i = 0; i < GST_EVENT_MAX_STICKY; i++) {
if ((event = pad->sticky[i]))
events[i] = gst_event_ref (event);
else
events[i] = NULL;
}
/* clear the flag */
GST_OBJECT_FLAG_UNSET (pad, GST_PAD_STICKY_PENDING);
GST_OBJECT_UNLOCK (pad);
/* and push */
GST_DEBUG_OBJECT (pad, "pushing sticky events");
for (i = 0; i < GST_EVENT_MAX_STICKY; i++) {
if ((event = events[i]))
eventfunc (pad, event);
}
/* and restart, we released the lock things might have changed */
goto again;
}
}
GST_OBJECT_UNLOCK (pad);
/* see if the signal should be emited, we emit before caps nego as
@ -4463,9 +4515,10 @@ gst_pad_push_event (GstPad * pad, GstEvent * event)
/* store the event on the pad, but only on srcpads */
if (GST_PAD_IS_SRC (pad) && GST_EVENT_IS_STICKY (event)) {
GstEvent **eventp = &pad->sticky[GST_EVENT_STICKY_IDX (event)];
GST_LOG_OBJECT (pad, "storing sticky event %s",
GST_EVENT_TYPE_NAME (event));
guint idx = GST_EVENT_STICKY_IDX (event);
GstEvent **eventp = &pad->sticky[idx];
GST_LOG_OBJECT (pad, "storing sticky event %s at index %u",
GST_EVENT_TYPE_NAME (event), idx);
gst_event_replace (eventp, event);
}

17
gst/gstpad.h
View file

@ -509,18 +509,20 @@ typedef enum {
* @GST_PAD_IN_GETCAPS: GstPadGetCapsFunction() is running now
* @GST_PAD_IN_SETCAPS: GstPadSetCapsFunction() is running now
* @GST_PAD_BLOCKING: is pad currently blocking on a buffer or event
* @GST_PAD_STICKY_PENDING: sticky events should be pushed
* @GST_PAD_FLAG_LAST: offset to define more flags
*
* Pad state flags
*/
typedef enum {
GST_PAD_BLOCKED = (GST_OBJECT_FLAG_LAST << 0),
GST_PAD_FLUSHING = (GST_OBJECT_FLAG_LAST << 1),
GST_PAD_IN_GETCAPS = (GST_OBJECT_FLAG_LAST << 2),
GST_PAD_IN_SETCAPS = (GST_OBJECT_FLAG_LAST << 3),
GST_PAD_BLOCKING = (GST_OBJECT_FLAG_LAST << 4),
GST_PAD_BLOCKED = (GST_OBJECT_FLAG_LAST << 0),
GST_PAD_FLUSHING = (GST_OBJECT_FLAG_LAST << 1),
GST_PAD_IN_GETCAPS = (GST_OBJECT_FLAG_LAST << 2),
GST_PAD_IN_SETCAPS = (GST_OBJECT_FLAG_LAST << 3),
GST_PAD_BLOCKING = (GST_OBJECT_FLAG_LAST << 4),
GST_PAD_STICKY_PENDING = (GST_OBJECT_FLAG_LAST << 5),
/* padding */
GST_PAD_FLAG_LAST = (GST_OBJECT_FLAG_LAST << 8)
GST_PAD_FLAG_LAST = (GST_OBJECT_FLAG_LAST << 16)
} GstPadFlags;
/* FIXME: this awful circular dependency need to be resolved properly (see padtemplate.h) */
@ -614,7 +616,7 @@ struct _GstPad {
GstPadCheckGetRangeFunction checkgetrangefunc;
GstPadGetRangeFunction getrangefunc;
GstPadEventFunction eventfunc;
GstEvent *sticky[16];
GstEvent *sticky[GST_EVENT_MAX_STICKY];
GstActivateMode mode;
@ -697,6 +699,7 @@ struct _GstPadClass {
#define GST_PAD_IS_FLUSHING(pad) (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLUSHING))
#define GST_PAD_IS_IN_GETCAPS(pad) (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_IN_GETCAPS))
#define GST_PAD_IS_IN_SETCAPS(pad) (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_IN_SETCAPS))
#define GST_PAD_IS_STICKY_PENDING(pad) (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_STICKY_PENDING))
#define GST_PAD_IS_SRC(pad) (GST_PAD_DIRECTION(pad) == GST_PAD_SRC)
#define GST_PAD_IS_SINK(pad) (GST_PAD_DIRECTION(pad) == GST_PAD_SINK)