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element-templates: Add helper code to transform_caps

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This commit is contained in:
David Schleef 2013-04-12 14:07:31 -07:00
parent 8552396c36
commit 12a4ff1100
1 changed files with 23 additions and 1 deletions
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24
tools/element-templates/basetransform
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@ -79,10 +79,32 @@ gst_replace_transform_caps (GstBaseTransform * trans, GstPadDirection direction,
GstCaps * caps, GstCaps * filter)
{
GstReplace *replace = GST_REPLACE (trans);
GstCaps *othercaps;
GST_DEBUG_OBJECT (replace, "transform_caps");
return NULL;
othercaps = gst_caps_copy (caps);
/* Copy other caps and modify as appropriate */
/* This works for the simplest cases, where the transform modifies one
* or more fields in the caps structure. It does not work correctly
* if passthrough caps are preferred. */
if (direction == GST_PAD_SRC) {
/* transform caps going upstream */
} else {
/* transform caps going downstream */
}
if (filter) {
GstCaps *intersect;
intersect = gst_caps_intersect (othercaps, filter);
gst_caps_unref (othercaps);
return intersect;
} else {
return othercaps;
}
}
static GstCaps *