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rtpbin: allow FEC elements with Always pads

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This patch enable picking up FEC decoder or enocder that have
static repair packets pad.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1860>
This commit is contained in:
Tomasz Andrzejak 2022-03-04 18:58:56 +01:00 committed by GStreamer Marge Bot
parent 40efef1fac
commit e74435008f
1 changed files with 107 additions and 7 deletions
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114
subprojects/gst-plugins-good/gst/rtpmanager/gstrtpbin.c
View file

@ -4376,20 +4376,47 @@ remove_recv_rtp (GstRtpBin * rtpbin, GstRtpBinSession * session)
}
}
static gint
fec_sinkpad_find (const GValue * item, gchar * padname)
{
GstPad *pad = g_value_get_object (item);
return g_strcmp0 (GST_PAD_NAME (pad), padname);
}
static GstPad *
complete_session_fec (GstRtpBin * rtpbin, GstRtpBinSession * session,
guint fec_idx)
{
gboolean have_static_pad;
gchar *padname;
GstPad *ret;
GstIterator *it;
GValue item = { 0, };
if (!ensure_early_fec_decoder (rtpbin, session))
goto no_decoder;
GST_DEBUG_OBJECT (rtpbin, "getting FEC sink pad");
padname = g_strdup_printf ("fec_%u", fec_idx);
ret = gst_element_request_pad_simple (session->early_fec_decoder, padname);
GST_DEBUG_OBJECT (rtpbin, "getting FEC sink pad %s", padname);
/* First try to find the decoder static pad that matches the padname */
it = gst_element_iterate_sink_pads (session->early_fec_decoder);
have_static_pad =
gst_iterator_find_custom (it, (GCompareFunc) fec_sinkpad_find, &item,
padname);
if (have_static_pad) {
ret = g_value_get_object (&item);
gst_object_ref (ret);
g_value_unset (&item);
} else {
ret = gst_element_request_pad_simple (session->early_fec_decoder, padname);
}
g_free (padname);
gst_iterator_free (it);
if (ret == NULL)
goto pad_failed;
@ -4647,9 +4674,24 @@ remove_recv_fec_for_pad (GstRtpBin * rtpbin, GstRtpBinSession * session,
if (target) {
item = g_slist_find (session->recv_fec_sinks, target);
if (item) {
gst_element_release_request_pad (session->early_fec_decoder, item->data);
GstPadTemplate *templ;
GstPad *pad;
pad = item->data;
templ = gst_pad_get_pad_template (pad);
if (GST_PAD_TEMPLATE_PRESENCE (templ) == GST_PAD_REQUEST) {
GST_DEBUG_OBJECT (rtpbin,
"Releasing FEC decoder pad %" GST_PTR_FORMAT, pad);
gst_element_release_request_pad (session->early_fec_decoder, pad);
} else {
gst_object_unref (pad);
}
session->recv_fec_sinks =
g_slist_delete_link (session->recv_fec_sinks, item);
gst_object_unref (templ);
}
gst_object_unref (target);
}
@ -4867,8 +4909,7 @@ setup_aux_sender (GstRtpBin * rtpbin, GstRtpBinSession * session,
}
static void
fec_encoder_pad_added_cb (GstElement * encoder, GstPad * pad,
GstRtpBinSession * session)
fec_encoder_add_pad_unlocked (GstPad * pad, GstRtpBinSession * session)
{
GstElementClass *klass;
gchar *gname;
@ -4886,7 +4927,6 @@ fec_encoder_pad_added_cb (GstElement * encoder, GstPad * pad,
GST_INFO_OBJECT (session->bin, "FEC encoder for session %u exposed new pad",
session->id);
GST_RTP_BIN_LOCK (session->bin);
klass = GST_ELEMENT_GET_CLASS (session->bin);
gname = g_strdup_printf ("send_fec_src_%u_%u", session->id, fec_idx);
templ = gst_element_class_get_pad_template (klass, "send_fec_src_%u_%u");
@ -4897,12 +4937,50 @@ fec_encoder_pad_added_cb (GstElement * encoder, GstPad * pad,
gst_pad_sticky_events_foreach (pad, copy_sticky_events, ghost);
gst_element_add_pad (GST_ELEMENT (session->bin), ghost);
g_free (gname);
GST_RTP_BIN_UNLOCK (session->bin);
done:
return;
}
static void
fec_encoder_add_pad (GstPad * pad, GstRtpBinSession * session)
{
GST_RTP_BIN_LOCK (session->bin);
fec_encoder_add_pad_unlocked (pad, session);
GST_RTP_BIN_UNLOCK (session->bin);
}
static gint
fec_srcpad_iterator_filter (const GValue * item, GValue * unused)
{
guint fec_idx;
GstPad *pad = g_value_get_object (item);
GstPadTemplate *templ = gst_pad_get_pad_template (pad);
gint have_static_pad =
(GST_PAD_TEMPLATE_PRESENCE (templ) == GST_PAD_ALWAYS) &&
(sscanf (GST_PAD_NAME (pad), "fec_%u", &fec_idx) == 1);
gst_object_unref (templ);
/* return 0 to retain pad in filtered iterator */
return !have_static_pad;
}
static void
fec_srcpad_iterator_foreach (const GValue * item, GstRtpBinSession * session)
{
GstPad *pad = g_value_get_object (item);
fec_encoder_add_pad_unlocked (pad, session);
}
static void
fec_encoder_pad_added_cb (GstElement * encoder, GstPad * pad,
GstRtpBinSession * session)
{
fec_encoder_add_pad (pad, session);
}
static GstElement *
request_fec_encoder (GstRtpBin * rtpbin, GstRtpBinSession * session,
guint sessid)
@ -4940,6 +5018,28 @@ request_fec_encoder (GstRtpBin * rtpbin, GstRtpBinSession * session,
ret = session_request_element (session, SIGNAL_REQUEST_FEC_ENCODER);
if (ret) {
/* First, add encoder pads that match fec_% template and are already present */
GstIterator *it, *filter;
GstIteratorResult it_ret = GST_ITERATOR_OK;
it = gst_element_iterate_src_pads (ret);
filter =
gst_iterator_filter (it, (GCompareFunc) fec_srcpad_iterator_filter,
NULL);
while (it_ret == GST_ITERATOR_OK || it_ret == GST_ITERATOR_RESYNC) {
it_ret =
gst_iterator_foreach (filter,
(GstIteratorForeachFunction) fec_srcpad_iterator_foreach, session);
if (it_ret == GST_ITERATOR_RESYNC)
gst_iterator_resync (filter);
}
gst_iterator_free (filter);
/* Finally, connect to pad-added signal if any of the encoder pads are
* added later */
g_signal_connect (ret, "pad-added", G_CALLBACK (fec_encoder_pad_added_cb),
session);
}