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dvbsuboverlay: Check if downstream supports GstVideoOverlayComposition.

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Fix the negotiation of GstVideoOverlayComposition by checking
intersection with the peer caps, rather than just accept-caps,
which might only check the pad template.

https://bugzilla.gnome.org/show_bug.cgi?id=755113
This commit is contained in:
Jan Schmidt 2015-09-17 00:01:58 +10:00
parent 50400fa2a6
commit 86a8ff50c0
1 changed files with 13 additions and 3 deletions
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16
gst/dvbsuboverlay/gstdvbsuboverlay.c
View file

@ -686,6 +686,7 @@ gst_dvbsub_overlay_negotiate (GstDVBSubOverlay * overlay, GstCaps * caps)
|| !gst_caps_features_contains (f,
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION)) {
GstCaps *overlay_caps;
GstCaps *peercaps;
/* In this case we added the meta, but we can work without it
* so preserve the original caps so we can use it as a fallback */
@ -695,9 +696,18 @@ gst_dvbsub_overlay_negotiate (GstDVBSubOverlay * overlay, GstCaps * caps)
gst_caps_features_add (f,
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION);
ret = gst_pad_peer_query_accept_caps (overlay->srcpad, overlay_caps);
GST_DEBUG_OBJECT (overlay, "Downstream accepts the overlay meta: %d", ret);
if (ret) {
/* FIXME: We should probably check if downstream *prefers* the
* overlay meta, and only enforce usage of it if we can't handle
* the format ourselves and thus would have to drop the overlays.
* Otherwise we should prefer what downstream wants here.
*/
peercaps = gst_pad_peer_query_caps (overlay->srcpad, NULL);
caps_has_meta = gst_caps_can_intersect (peercaps, overlay_caps);
gst_caps_unref (peercaps);
GST_DEBUG_OBJECT (overlay, "Downstream accepts the overlay meta: %d",
caps_has_meta);
if (caps_has_meta) {
gst_caps_unref (caps);
caps = overlay_caps;