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basetransform: Check for pad alloc caps when suggestion is not fixed

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If after computing the suggestion with downstream caps we still have
a non-fixed suggestion caps try to intersect with the input caps
of the pad alloc to avoid useless renegotiations.

https://bugzilla.gnome.org/show_bug.cgi?id=642130
This commit is contained in:
Thiago Santos 2011-02-11 17:47:17 -03:00 committed by Wim Taymans
parent f8828eace6
commit 3aaef921c5
1 changed files with 14 additions and 0 deletions
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14
libs/gst/base/gstbasetransform.c
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@ -1757,6 +1757,20 @@ gst_base_transform_buffer_alloc (GstPad * pad, guint64 offset, guint size,
if (gst_caps_is_empty (sink_suggest))
goto not_supported;
/* try the alloc caps if it is still not fixed */
if (!gst_caps_is_fixed (sink_suggest)) {
GstCaps *intersect;
GST_DEBUG_OBJECT (trans, "Checking if the input caps is compatible "
"with the non-fixed caps suggestion");
intersect = gst_caps_intersect (sink_suggest, caps);
if (!gst_caps_is_empty (intersect)) {
GST_DEBUG_OBJECT (trans, "It is, using it");
gst_caps_replace (&sink_suggest, caps);
}
gst_caps_unref (intersect);
}
/* be safe and call default fixate */
sink_suggest = gst_caps_make_writable (sink_suggest);
gst_pad_fixate_caps (GST_BASE_TRANSFORM_SINK_PAD (trans), sink_suggest);