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basetextoverlay: Send caps before doing allocation query

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This is currently a limitation of BaseTransform base class. Which means
pretty much every filters out there.

http://bugzilla.gnome.org/show_bug.cgi?id=751157
This commit is contained in:
Nicolas Dufresne 2015-07-20 15:11:06 -04:00
parent d1808a5dbf
commit a64a343077
1 changed files with 10 additions and 7 deletions
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17
ext/pango/gstbasetextoverlay.c
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@ -743,11 +743,19 @@ gst_base_text_overlay_negotiate (GstBaseTextOverlay * overlay, GstCaps * caps)
if (upstream_has_meta) {
overlay_caps = gst_caps_ref (caps);
} else {
GstCaps *tmp_caps;
GstQuery *query;
guint alloc_index;
/* BaseTransform requires caps for the allocation query to work */
tmp_caps = gst_caps_copy (caps);
f = gst_caps_get_features (tmp_caps, 0);
gst_caps_features_add (f,
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION);
ret = gst_pad_set_caps (overlay->srcpad, caps);
/* First check if the allocation meta has compositon */
query = gst_query_new_allocation (caps, FALSE);
query = gst_query_new_allocation (tmp_caps, FALSE);
if (!gst_pad_peer_query (overlay->srcpad, query)) {
/* no problem, we use the query defaults */
@ -789,12 +797,7 @@ gst_base_text_overlay_negotiate (GstBaseTextOverlay * overlay, GstCaps * caps)
gst_query_unref (query);
/* Then check if downstream accept overlay composition in caps */
overlay_caps = gst_caps_copy (caps);
f = gst_caps_get_features (overlay_caps, 0);
gst_caps_features_add (f,
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION);
overlay_caps = tmp_caps;
caps_has_meta = gst_pad_peer_query_accept_caps (overlay->srcpad,
overlay_caps);