/* 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;
}
