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libs/gst/base/gstbasetransform.c: Add beginnings of a more optimized acceptcaps function than the default core one.

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Original commit message from CVS:
* libs/gst/base/gstbasetransform.c: (gst_base_transform_init),
(gst_base_transform_getcaps), (gst_base_transform_find_transform),
(gst_base_transform_acceptcaps), (gst_base_transform_getrange):
Add beginnings of a more optimized acceptcaps function than the default
core one.
This commit is contained in:
Wim Taymans 2008-11-21 17:14:48 +00:00
parent ede1e01d13
commit c0e491cdca
2 changed files with 76 additions and 1 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2008-11-21 Wim Taymans <wim.taymans@collabora.co.uk>
* libs/gst/base/gstbasetransform.c: (gst_base_transform_init),
(gst_base_transform_getcaps), (gst_base_transform_find_transform),
(gst_base_transform_acceptcaps), (gst_base_transform_getrange):
Add beginnings of a more optimized acceptcaps function than the default
core one.
2008-11-21 Wim Taymans <wim.taymans@collabora.co.uk>
* gst/gstpad.c: (gst_pad_accept_caps):

69
libs/gst/base/gstbasetransform.c
View file

@ -314,6 +314,7 @@ static GstFlowReturn gst_base_transform_getrange (GstPad * pad, guint64 offset,
static GstFlowReturn gst_base_transform_chain (GstPad * pad,
GstBuffer * buffer);
static GstCaps *gst_base_transform_getcaps (GstPad * pad);
static gboolean gst_base_transform_acceptcaps (GstPad * pad, GstCaps * caps);
static gboolean gst_base_transform_setcaps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_base_transform_buffer_alloc (GstPad * pad,
guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
@ -381,6 +382,8 @@ gst_base_transform_init (GstBaseTransform * trans,
trans->sinkpad = gst_pad_new_from_template (pad_template, "sink");
gst_pad_set_getcaps_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_getcaps));
gst_pad_set_acceptcaps_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_acceptcaps));
gst_pad_set_setcaps_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_setcaps));
gst_pad_set_event_function (trans->sinkpad,
@ -399,6 +402,8 @@ gst_base_transform_init (GstBaseTransform * trans,
trans->srcpad = gst_pad_new_from_template (pad_template, "src");
gst_pad_set_getcaps_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_getcaps));
gst_pad_set_acceptcaps_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_acceptcaps));
gst_pad_set_event_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_src_event));
gst_pad_set_checkgetrange_function (trans->srcpad,
@ -615,6 +620,7 @@ gst_base_transform_getcaps (GstPad * pad)
temp = gst_caps_intersect (caps, templ);
GST_DEBUG_OBJECT (pad, "intersected %" GST_PTR_FORMAT, temp);
gst_caps_unref (caps);
/* then see what we can transform this to */
caps = gst_base_transform_transform_caps (trans,
GST_PAD_DIRECTION (otherpad), temp);
@ -632,7 +638,7 @@ gst_base_transform_getcaps (GstPad * pad)
/* this is what we can do */
caps = temp;
} else {
/* no peer, our padtemplate is enough then */
/* no peer or the peer can do anything, our padtemplate is enough then */
caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
}
@ -962,6 +968,67 @@ error_cleanup:
}
}
static gboolean
gst_base_transform_acceptcaps (GstPad * pad, GstCaps * caps)
{
GstBaseTransform *trans;
GstPad *otherpad;
GstCaps *othercaps = NULL;
gboolean ret = TRUE;
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
/* we need fixed caps for the check, fall back to the default implementation
* if we don't */
if (!gst_caps_is_fixed (caps)) {
GstCaps *intersect;
GST_DEBUG_OBJECT (pad, "non fixed accept caps %" GST_PTR_FORMAT, caps);
othercaps = gst_pad_get_caps (pad);
if (!othercaps)
goto no_transform_possible;
intersect = gst_caps_intersect (othercaps, caps);
GST_DEBUG_OBJECT (pad, "intersection %" GST_PTR_FORMAT, intersect);
ret = !gst_caps_is_empty (intersect);
gst_caps_unref (intersect);
if (!ret)
goto no_transform_possible;
} else {
GST_DEBUG_OBJECT (pad, "accept caps %" GST_PTR_FORMAT, caps);
/* find best possible caps for the other pad as a way to see if we can
* transform this caps. */
othercaps = gst_base_transform_find_transform (trans, pad, caps);
if (!othercaps || gst_caps_is_empty (othercaps))
goto no_transform_possible;
GST_DEBUG_OBJECT (pad, "we can transform to %" GST_PTR_FORMAT, othercaps);
}
done:
if (othercaps)
gst_caps_unref (othercaps);
gst_object_unref (trans);
return ret;
/* ERRORS */
no_transform_possible:
{
GST_WARNING_OBJECT (trans,
"transform could not transform %" GST_PTR_FORMAT
" in anything we support", caps);
ret = FALSE;
goto done;
}
}
/* called when new caps arrive on the sink or source pad,
* We try to find the best caps for the other side using our _find_transform()
* function. If there are caps, we configure the transform for this new