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pad: Set caps on pad before checking if the pad is linked

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This allows the setcaps handler and notify::caps to link
the pad downstream and doesn't require hacks to always
provide a peer to the pad, like in decodebin2.
This commit is contained in:
Stas Sergeev 2011-09-13 17:04:31 +04:00 committed by Sebastian Dröge
parent 7be3899653
commit b090a376d4
1 changed files with 10 additions and 8 deletions
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18
gst/gstpad.c
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@ -4479,27 +4479,30 @@ gst_pad_push_data (GstPad * pad, gboolean is_buffer, void *data,
GST_OBJECT_LOCK (pad);
}
if (G_UNLIKELY ((peer = GST_PAD_PEER (pad)) == NULL))
goto not_linked;
/* Before pushing the buffer to the peer pad, ensure that caps
* are set on this pad */
caps = gst_pad_data_get_caps (is_buffer, data);
caps_changed = caps && caps != GST_PAD_CAPS (pad);
/* take ref to peer pad before releasing the lock */
gst_object_ref (peer);
GST_OBJECT_UNLOCK (pad);
/* we got a new datatype from the pad, it had better handle it */
if (G_UNLIKELY (caps_changed)) {
/* unlock before setting */
GST_OBJECT_UNLOCK (pad);
GST_DEBUG_OBJECT (pad,
"caps changed from %" GST_PTR_FORMAT " to %p %" GST_PTR_FORMAT,
GST_PAD_CAPS (pad), caps, caps);
if (G_UNLIKELY (!gst_pad_set_caps (pad, caps)))
goto not_negotiated;
GST_OBJECT_LOCK (pad);
}
if (G_UNLIKELY ((peer = GST_PAD_PEER (pad)) == NULL))
goto not_linked;
/* take ref to peer pad before releasing the lock */
gst_object_ref (peer);
GST_OBJECT_UNLOCK (pad);
ret = gst_pad_chain_data_unchecked (peer, is_buffer, data, cache);
gst_object_unref (peer);
@ -4564,7 +4567,6 @@ not_linked:
not_negotiated:
{
gst_pad_data_unref (is_buffer, data);
gst_object_unref (peer);
GST_CAT_DEBUG_OBJECT (GST_CAT_SCHEDULING, pad,
"element pushed data then refused to accept the caps");
return GST_FLOW_NOT_NEGOTIATED;