/* we can only accept caps that we and downstream can handle. */ static GstCaps * gst_live_adder_sink_getcaps (GstPad * pad) { GstLiveAdder *adder; GstCaps *result, *peercaps, *sinkcaps; adder = GST_LIVE_ADDER (GST_PAD_PARENT (pad)); /* get the downstream possible caps */ peercaps = gst_pad_peer_get_caps (adder->srcpad); /* get the allowed caps on this sinkpad, we use the fixed caps function so * that it does not call recursively in this function. */ sinkcaps = gst_pad_get_fixed_caps_func (pad); if (peercaps) { /* if the peer has caps, intersect */ GST_DEBUG_OBJECT (adder, "intersecting peer and template caps"); result = gst_caps_intersect (peercaps, sinkcaps); gst_caps_unref (peercaps); gst_caps_unref (sinkcaps); } else { /* the peer has no caps (or there is no peer), just use the allowed caps * of this sinkpad. */ GST_DEBUG_OBJECT (adder, "no peer caps, using sinkcaps"); result = sinkcaps; } return result; }
/* we can only accept caps that we and downstream can handle. * if we have filtercaps set, use those to constrain the target caps. */ static GstCaps * gst_adder_sink_getcaps (GstPad * pad) { GstAdder *adder; GstCaps *result, *peercaps, *sinkcaps, *filter_caps; adder = GST_ADDER (GST_PAD_PARENT (pad)); GST_OBJECT_LOCK (adder); /* take filter */ if ((filter_caps = adder->filter_caps)) gst_caps_ref (filter_caps); GST_OBJECT_UNLOCK (adder); /* get the downstream possible caps */ peercaps = gst_pad_peer_get_caps (adder->srcpad); /* get the allowed caps on this sinkpad, we use the fixed caps function so * that it does not call recursively in this function. */ sinkcaps = gst_pad_get_fixed_caps_func (pad); if (peercaps) { /* restrict with filter-caps if any */ if (filter_caps) { GST_DEBUG_OBJECT (adder, "filtering peer caps"); result = gst_caps_intersect (peercaps, filter_caps); gst_caps_unref (peercaps); peercaps = result; } /* if the peer has caps, intersect */ GST_DEBUG_OBJECT (adder, "intersecting peer and template caps"); result = gst_caps_intersect (peercaps, sinkcaps); gst_caps_unref (peercaps); gst_caps_unref (sinkcaps); } else { /* the peer has no caps (or there is no peer), just use the allowed caps * of this sinkpad. */ /* restrict with filter-caps if any */ if (filter_caps) { GST_DEBUG_OBJECT (adder, "no peer caps, using filtered sinkcaps"); result = gst_caps_intersect (sinkcaps, filter_caps); gst_caps_unref (sinkcaps); } else { GST_DEBUG_OBJECT (adder, "no peer caps, using sinkcaps"); result = sinkcaps; } } if (filter_caps) gst_caps_unref (filter_caps); GST_LOG_OBJECT (adder, "getting caps on pad %p,%s to %" GST_PTR_FORMAT, pad, GST_PAD_NAME (pad), result); return result; }