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pad: add variants of gst_pad_get_caps() that don't copy caps. Fixes #590941

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In most places in core and baseclasses we just need the caps to do caps-
intersections. In that case ref'ed caps are enough (no need to copy).
This patch also switches the code to use the new functions.
API: gst_pad_get_caps_refed(), gst_pad_peer_get_caps_refed()
This commit is contained in:
Stefan Kost 2009-10-07 11:43:54 +03:00
parent 558f4aca59
commit fcc5d783df
8 changed files with 97 additions and 21 deletions
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2
docs/gst/gstreamer-sections.txt
View file

@ -1343,6 +1343,7 @@ gst_pad_is_linked
gst_pad_can_link
gst_pad_get_caps
gst_pad_get_caps_refed
gst_pad_get_allowed_caps
gst_pad_get_negotiated_caps
gst_pad_get_pad_template_caps
@ -1350,6 +1351,7 @@ gst_pad_set_caps
gst_pad_get_peer
gst_pad_peer_get_caps
gst_pad_peer_get_caps_refed
gst_pad_use_fixed_caps
gst_pad_is_active

2
gst/gstghostpad.c
View file

@ -224,7 +224,7 @@ gst_proxy_pad_do_getcaps (GstPad * pad)
if (target) {
/* if we have a real target, proxy the call */
res = gst_pad_get_caps (target);
res = gst_pad_get_caps_refed (target);
GST_DEBUG_OBJECT (pad, "get caps of target %s:%s : %" GST_PTR_FORMAT,
GST_DEBUG_PAD_NAME (target), res);

94
gst/gstpad.c
View file

@ -2170,6 +2170,7 @@ gst_pad_get_caps_unlocked (GstPad * pad)
goto done;
}
/* this almost never happens */
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad, "pad has no caps");
result = gst_caps_new_empty ();
@ -2177,6 +2178,38 @@ done:
return result;
}
/* FIXME-0.11: what about making this the default and using
* gst_caps_make_writable() explicitely where needed
*/
/**
* gst_pad_get_caps_refed:
* @pad: a #GstPad to get the capabilities of.
*
* Gets the capabilities this pad can produce or consume. Preferred function if
* one only wants to read or intersect the caps.
*
* Returns: the caps of the pad with incremented ref-count.
*
* Since: 0.10.25
*/
GstCaps *
gst_pad_get_caps_refed (GstPad * pad)
{
GstCaps *result = NULL;
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
GST_OBJECT_LOCK (pad);
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad, "get pad caps");
result = gst_pad_get_caps_unlocked (pad);
GST_OBJECT_UNLOCK (pad);
return result;
}
/**
* gst_pad_get_caps:
* @pad: a #GstPad to get the capabilities of.
@ -2195,33 +2228,70 @@ done:
GstCaps *
gst_pad_get_caps (GstPad * pad)
{
GstCaps *result = gst_pad_get_caps_refed (pad);
/* be sure that we have a copy */
if (G_LIKELY (result))
result = gst_caps_make_writable (result);
return result;
}
/* FIXME-0.11: what about making this the default and using
* gst_caps_make_writable() explicitely where needed
*/
/**
* gst_pad_peer_get_caps_refed:
* @pad: a #GstPad to get the capabilities of.
*
* Gets the capabilities of the peer connected to this pad. Preferred function
* if one only wants to read or intersect the caps.
*
* Returns: the caps of the pad with incremented ref-count.
*
* Since: 0.10.25
*/
GstCaps *
gst_pad_peer_get_caps_refed (GstPad * pad)
{
GstPad *peerpad;
GstCaps *result = NULL;
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
GST_OBJECT_LOCK (pad);
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad, "get pad caps");
GST_CAT_DEBUG_OBJECT (GST_CAT_CAPS, pad, "get peer caps");
result = gst_pad_get_caps_unlocked (pad);
/* be sure that we have a copy */
if (result)
result = gst_caps_make_writable (result);
peerpad = GST_PAD_PEER (pad);
if (G_UNLIKELY (peerpad == NULL))
goto no_peer;
gst_object_ref (peerpad);
GST_OBJECT_UNLOCK (pad);
result = gst_pad_get_caps_refed (peerpad);
gst_object_unref (peerpad);
return result;
no_peer:
{
GST_OBJECT_UNLOCK (pad);
return NULL;
}
}
/**
* gst_pad_peer_get_caps:
* @pad: a #GstPad to get the peer capabilities of.
*
* Gets the capabilities of the peer connected to this pad.
* Gets the capabilities of the peer connected to this pad. Similar to
* gst_pad_get_caps().
*
* Returns: the #GstCaps of the peer pad. This function returns a new caps, so
* use gst_caps_unref to get rid of it. this function returns NULL if there is
* Returns: a newly allocated copy of the #GstCaps of the peer pad. Use
* gst_caps_unref() to get rid of it. This function returns %NULL if there is
* no peer pad.
*/
GstCaps *
@ -2367,7 +2437,7 @@ gst_pad_acceptcaps_default (GstPad * pad, GstCaps * caps)
GST_DEBUG_OBJECT (pad, "caps %" GST_PTR_FORMAT, caps);
allowed = gst_pad_get_caps (pad);
allowed = gst_pad_get_caps_refed (pad);
if (!allowed)
goto nothing_allowed;
@ -2703,9 +2773,9 @@ gst_pad_get_allowed_caps (GstPad * pad)
gst_object_ref (peer);
GST_OBJECT_UNLOCK (pad);
mycaps = gst_pad_get_caps (pad);
mycaps = gst_pad_get_caps_refed (pad);
peercaps = gst_pad_get_caps (peer);
peercaps = gst_pad_get_caps_refed (peer);
gst_object_unref (peer);
caps = gst_caps_intersect (mycaps, peercaps);

2
gst/gstpad.h
View file

@ -890,11 +890,13 @@ void gst_pad_set_setcaps_function (GstPad *pad, GstPadSetCapsFunction setcaps
G_CONST_RETURN GstCaps* gst_pad_get_pad_template_caps (GstPad *pad);
/* capsnego function for linked/unlinked pads */
GstCaps * gst_pad_get_caps_refed (GstPad * pad);
GstCaps * gst_pad_get_caps (GstPad * pad);
void gst_pad_fixate_caps (GstPad * pad, GstCaps *caps);
gboolean gst_pad_accept_caps (GstPad * pad, GstCaps *caps);
gboolean gst_pad_set_caps (GstPad * pad, GstCaps *caps);
GstCaps * gst_pad_peer_get_caps_refed (GstPad * pad);
GstCaps * gst_pad_peer_get_caps (GstPad * pad);
gboolean gst_pad_peer_accept_caps (GstPad * pad, GstCaps *caps);

2
gst/gstutils.c
View file

@ -2634,7 +2634,7 @@ intersect_caps_func (GstPad * pad, GValue * ret, GstPad * orig)
GstCaps *peercaps, *existing;
existing = g_value_get_pointer (ret);
peercaps = gst_pad_peer_get_caps (pad);
peercaps = gst_pad_peer_get_caps_refed (pad);
if (G_LIKELY (peercaps)) {
g_value_set_pointer (ret, gst_caps_intersect (existing, peercaps));
gst_caps_unref (existing);

4
libs/gst/base/gstbasesrc.c
View file

@ -2407,7 +2407,7 @@ gst_base_src_default_negotiate (GstBaseSrc * basesrc)
gboolean result = FALSE;
/* first see what is possible on our source pad */
thiscaps = gst_pad_get_caps (GST_BASE_SRC_PAD (basesrc));
thiscaps = gst_pad_get_caps_refed (GST_BASE_SRC_PAD (basesrc));
GST_DEBUG_OBJECT (basesrc, "caps of src: %" GST_PTR_FORMAT, thiscaps);
/* nothing or anything is allowed, we're done */
if (thiscaps == NULL || gst_caps_is_any (thiscaps))
@ -2417,7 +2417,7 @@ gst_base_src_default_negotiate (GstBaseSrc * basesrc)
goto no_caps;
/* get the peer caps */
peercaps = gst_pad_peer_get_caps (GST_BASE_SRC_PAD (basesrc));
peercaps = gst_pad_peer_get_caps_refed (GST_BASE_SRC_PAD (basesrc));
GST_DEBUG_OBJECT (basesrc, "caps of peer: %" GST_PTR_FORMAT, peercaps);
if (peercaps) {
GstCaps *icaps;

10
libs/gst/base/gstbasetransform.c
View file

@ -613,14 +613,14 @@ gst_base_transform_getcaps (GstPad * pad)
otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
/* we can do what the peer can */
caps = gst_pad_peer_get_caps (otherpad);
caps = gst_pad_peer_get_caps_refed (otherpad);
if (caps) {
GstCaps *temp;
const GstCaps *templ;
GST_DEBUG_OBJECT (pad, "peer caps %" GST_PTR_FORMAT, caps);
/* filtered against our padtemplate */
/* filtered against our padtemplate on the other side */
templ = gst_pad_get_pad_template_caps (otherpad);
GST_DEBUG_OBJECT (pad, "our template %" GST_PTR_FORMAT, templ);
temp = gst_caps_intersect (caps, templ);
@ -635,7 +635,7 @@ gst_base_transform_getcaps (GstPad * pad)
if (caps == NULL)
goto done;
/* and filter against the template again */
/* and filter against the template of this pad */
templ = gst_pad_get_pad_template_caps (pad);
GST_DEBUG_OBJECT (pad, "our template %" GST_PTR_FORMAT, templ);
temp = gst_caps_intersect (caps, templ);
@ -856,7 +856,7 @@ gst_base_transform_find_transform (GstBaseTransform * trans, GstPad * pad,
GST_DEBUG_OBJECT (trans, "othercaps now %" GST_PTR_FORMAT, othercaps);
peercaps = gst_pad_get_caps (otherpeer);
peercaps = gst_pad_get_caps_refed (otherpeer);
intersect = gst_caps_intersect (peercaps, othercaps);
gst_caps_unref (peercaps);
gst_caps_unref (othercaps);
@ -1002,7 +1002,7 @@ gst_base_transform_acceptcaps (GstPad * pad, GstCaps * caps)
GST_DEBUG_OBJECT (pad, "non fixed accept caps %" GST_PTR_FORMAT, caps);
/* get all the formats we can handle on this pad */
allowed = gst_pad_get_caps (pad);
allowed = gst_pad_get_caps_refed (pad);
if (!allowed) {
GST_DEBUG_OBJECT (pad, "gst_pad_get_caps() failed");
goto no_transform_possible;

2
win32/common/libgstreamer.def
View file

@ -586,6 +586,7 @@ EXPORTS
gst_pad_flags_get_type
gst_pad_get_allowed_caps
gst_pad_get_caps
gst_pad_get_caps_refed
gst_pad_get_direction
gst_pad_get_element_private
gst_pad_get_fixed_caps_func
@ -615,6 +616,7 @@ EXPORTS
gst_pad_pause_task
gst_pad_peer_accept_caps
gst_pad_peer_get_caps
gst_pad_peer_get_caps_refed
gst_pad_peer_query
gst_pad_presence_get_type
gst_pad_proxy_getcaps