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decodebin2: Post all source pads in stream-topology messages as "element-srcpad" values

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This allows us to easily get ahold of all pads on a stream-topology message, including
pre-decoder ones, while "pad" only gives us access to the raw pads (as used by discoverer).
This commit is contained in:
Mart Raudsepp 2011-11-03 14:10:31 +02:00 committed by Sebastian Dröge
parent cee8710817
commit 5c58bcfd15
1 changed files with 23 additions and 3 deletions
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26
gst/playback/gstdecodebin2.c
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@ -3352,7 +3352,8 @@ sort_end_pads (GstDecodePad * da, GstDecodePad * db)
}
static GstCaps *
_gst_element_get_linked_caps (GstElement * src, GstElement * sink)
_gst_element_get_linked_caps (GstElement * src, GstElement * sink,
GstPad ** srcpad)
{
GstIterator *it;
GstElement *parent;
@ -3369,6 +3370,10 @@ _gst_element_get_linked_caps (GstElement * src, GstElement * sink)
parent = gst_pad_get_parent_element (peer);
if (parent == sink) {
caps = gst_pad_get_negotiated_caps (pad);
if (srcpad) {
gst_object_ref (pad);
*srcpad = pad;
}
done = TRUE;
}
@ -3397,6 +3402,7 @@ static GQuark topology_structure_name = 0;
static GQuark topology_caps = 0;
static GQuark topology_next = 0;
static GQuark topology_pad = 0;
static GQuark topology_element_srcpad = 0;
/* FIXME: Invent gst_structure_take_structure() to prevent all the
* structure copying for nothing
@ -3422,8 +3428,11 @@ gst_decode_chain_get_topology (GstDecodeChain * chain)
gst_structure_id_set (u, topology_caps, GST_TYPE_CAPS, chain->endcaps,
NULL);
if (chain->endpad)
if (chain->endpad) {
gst_structure_id_set (u, topology_pad, GST_TYPE_PAD, chain->endpad, NULL);
gst_structure_id_set (u, topology_element_srcpad, GST_TYPE_PAD,
chain->endpad, NULL);
}
gst_structure_id_set (s, topology_next, GST_TYPE_STRUCTURE, u, NULL);
gst_structure_free (u);
u = s;
@ -3453,13 +3462,15 @@ gst_decode_chain_get_topology (GstDecodeChain * chain)
GstDecodeElement *delem, *delem_next;
GstElement *elem, *elem_next;
GstCaps *caps;
GstPad *srcpad;
delem = l->data;
elem = delem->element;
delem_next = l->next->data;
elem_next = delem_next->element;
srcpad = NULL;
caps = _gst_element_get_linked_caps (elem_next, elem);
caps = _gst_element_get_linked_caps (elem_next, elem, &srcpad);
if (caps) {
s = gst_structure_id_empty_new (topology_structure_name);
@ -3470,6 +3481,12 @@ gst_decode_chain_get_topology (GstDecodeChain * chain)
gst_structure_free (u);
u = s;
}
if (srcpad) {
gst_structure_id_set (u, topology_element_srcpad, GST_TYPE_PAD, srcpad,
NULL);
gst_object_unref (srcpad);
}
}
/* Caps that resulted in this chain */
@ -3484,6 +3501,8 @@ gst_decode_chain_get_topology (GstDecodeChain * chain)
}
}
gst_structure_id_set (u, topology_caps, GST_TYPE_CAPS, caps, NULL);
gst_structure_id_set (u, topology_element_srcpad, GST_TYPE_PAD, chain->pad,
NULL);
gst_caps_unref (caps);
return u;
@ -4059,6 +4078,7 @@ gst_decode_bin_plugin_init (GstPlugin * plugin)
topology_caps = g_quark_from_static_string ("caps");
topology_next = g_quark_from_static_string ("next");
topology_pad = g_quark_from_static_string ("pad");
topology_element_srcpad = g_quark_from_static_string ("element-srcpad");
return gst_element_register (plugin, "decodebin2", GST_RANK_NONE,
GST_TYPE_DECODE_BIN);