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tee: implement custom acceptcaps function

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Implement a custom acceptcaps function on the sinkpad. We can accept any caps as
long as it is accepted by all downstream peer elements.
This commit is contained in:
Wim Taymans 2009-10-21 16:26:01 -04:00 committed by Wim Taymans
parent b95cc5031b
commit 2f7b348fc0
1 changed files with 43 additions and 0 deletions
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43
plugins/elements/gsttee.c
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@ -119,6 +119,7 @@ static GstFlowReturn gst_tee_chain (GstPad * pad, GstBuffer * buffer);
static GstFlowReturn gst_tee_chain_list (GstPad * pad, GstBufferList * list);
static GstFlowReturn gst_tee_buffer_alloc (GstPad * pad, guint64 offset,
guint size, GstCaps * caps, GstBuffer ** buf);
static gboolean gst_tee_sink_acceptcaps (GstPad * pad, GstCaps * caps);
static gboolean gst_tee_sink_activate_push (GstPad * pad, gboolean active);
static gboolean gst_tee_src_check_get_range (GstPad * pad);
static gboolean gst_tee_src_activate_pull (GstPad * pad, gboolean active);
@ -219,6 +220,8 @@ gst_tee_init (GstTee * tee, GstTeeClass * g_class)
GST_DEBUG_FUNCPTR (gst_pad_proxy_setcaps));
gst_pad_set_getcaps_function (tee->sinkpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
gst_pad_set_acceptcaps_function (tee->sinkpad,
GST_DEBUG_FUNCPTR (gst_tee_sink_acceptcaps));
gst_pad_set_bufferalloc_function (tee->sinkpad,
GST_DEBUG_FUNCPTR (gst_tee_buffer_alloc));
gst_pad_set_activatepush_function (tee->sinkpad,
@ -526,6 +529,46 @@ gst_tee_buffer_alloc (GstPad * pad, guint64 offset, guint size,
return res;
}
/* on the sink we accept caps that are acceptable to all srcpads */
static gboolean
gst_tee_sink_acceptcaps (GstPad * pad, GstCaps * caps)
{
GstTee *tee;
gboolean res, done;
GstIterator *it;
tee = GST_TEE (GST_PAD_PARENT (pad));
it = gst_element_iterate_src_pads (GST_ELEMENT_CAST (tee));
res = TRUE;
done = FALSE;
while (!done && res) {
gpointer item;
switch (gst_iterator_next (it, &item)) {
case GST_ITERATOR_OK:
res &= gst_pad_peer_accept_caps (GST_PAD_CAST (item), caps);
gst_object_unref (item);
break;
case GST_ITERATOR_RESYNC:
res = TRUE;
gst_iterator_resync (it);
break;
case GST_ITERATOR_ERROR:
res = FALSE;
done = TRUE;
break;
case GST_ITERATOR_DONE:
done = TRUE;
break;
}
}
gst_iterator_free (it);
return res;
}
static GstFlowReturn
gst_tee_do_push (GstTee * tee, GstPad * pad, gpointer data, gboolean is_list)
{