static GstFlowReturn
gst_rtp_ssrc_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstFlowReturn ret;
GstRtpSsrcDemux *demux;
guint32 ssrc;
GstRTPBuffer rtp = { NULL };
GstPad *srcpad;
GstRtpSsrcDemuxPad *dpad;
demux = GST_RTP_SSRC_DEMUX (parent);
if (!gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp))
goto invalid_payload;
ssrc = gst_rtp_buffer_get_ssrc (&rtp);
gst_rtp_buffer_unmap (&rtp);
GST_DEBUG_OBJECT (demux, "received buffer of SSRC %08x", ssrc);
srcpad = find_or_create_demux_pad_for_ssrc (demux, ssrc, RTP_PAD);
if (srcpad == NULL)
goto create_failed;
/* push to srcpad */
ret = gst_pad_push (srcpad, buf);
if (ret != GST_FLOW_OK) {
/* check if the ssrc still there, may have been removed */
GST_PAD_LOCK (demux);
dpad = find_demux_pad_for_ssrc (demux, ssrc);
if (dpad == NULL || dpad->rtp_pad != srcpad) {
/* SSRC was removed during the push ... ignore the error */
ret = GST_FLOW_OK;
}
GST_PAD_UNLOCK (demux);
}
gst_object_unref (srcpad);
return ret;
/* ERRORS */
invalid_payload:
{
/* this is fatal and should be filtered earlier */
GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
("Dropping invalid RTP payload"));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
create_failed:
{
GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
("Could not create new pad"));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_rtp_ssrc_demux_chain (GstPad * pad, GstBuffer * buf)
{
GstFlowReturn ret;
GstRtpSsrcDemux *demux;
guint32 ssrc;
GstRtpSsrcDemuxPad *dpad;
demux = GST_RTP_SSRC_DEMUX (GST_OBJECT_PARENT (pad));
if (!gst_rtp_buffer_validate (buf))
goto invalid_payload;
ssrc = gst_rtp_buffer_get_ssrc (buf);
GST_DEBUG_OBJECT (demux, "received buffer of SSRC %08x", ssrc);
GST_PAD_LOCK (demux);
dpad = find_demux_pad_for_ssrc (demux, ssrc);
if (dpad == NULL) {
if (!(dpad =
create_demux_pad_for_ssrc (demux, ssrc,
GST_BUFFER_TIMESTAMP (buf))))
goto create_failed;
}
GST_PAD_UNLOCK (demux);
/* push to srcpad */
ret = gst_pad_push (dpad->rtp_pad, buf);
return ret;
/* ERRORS */
invalid_payload:
{
/* this is fatal and should be filtered earlier */
GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
("Dropping invalid RTP payload"));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
create_failed:
{
GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
("Could not create new pad"));
GST_PAD_UNLOCK (demux);
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
static void
gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
{
GstRtpSsrcDemuxPad *dpad;
GST_PAD_LOCK (demux);
dpad = find_demux_pad_for_ssrc (demux, ssrc);
if (dpad == NULL) {
GST_PAD_UNLOCK (demux);
goto unknown_pad;
}
GST_DEBUG_OBJECT (demux, "clearing pad for SSRC %08x", ssrc);
demux->srcpads = g_slist_remove (demux->srcpads, dpad);
GST_PAD_UNLOCK (demux);
gst_pad_set_active (dpad->rtp_pad, FALSE);
gst_pad_set_active (dpad->rtcp_pad, FALSE);
g_signal_emit (G_OBJECT (demux),
gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD], 0, ssrc,
dpad->rtp_pad);
gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
g_free (dpad);
return;
/* ERRORS */
unknown_pad:
{
GST_WARNING_OBJECT (demux, "unknown SSRC %08x", ssrc);
return;
}
}
static GstFlowReturn
gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad, GstObject * parent,
GstBuffer * buf)
{
GstFlowReturn ret;
GstRtpSsrcDemux *demux;
guint32 ssrc;
GstRTCPPacket packet;
GstRTCPBuffer rtcp = { NULL, };
GstPad *srcpad;
GstRtpSsrcDemuxPad *dpad;
demux = GST_RTP_SSRC_DEMUX (parent);
if (!gst_rtcp_buffer_validate_reduced (buf))
goto invalid_rtcp;
gst_rtcp_buffer_map (buf, GST_MAP_READ, &rtcp);
if (!gst_rtcp_buffer_get_first_packet (&rtcp, &packet)) {
gst_rtcp_buffer_unmap (&rtcp);
goto invalid_rtcp;
}
/* first packet must be SR or RR, or in case of a reduced size RTCP packet
* it must be APP, RTPFB or PSFB feeadback, or else the validate would
* have failed */
switch (gst_rtcp_packet_get_type (&packet)) {
case GST_RTCP_TYPE_SR:
/* get the ssrc so that we can route it to the right source pad */
gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, NULL, NULL, NULL,
NULL);
break;
case GST_RTCP_TYPE_RR:
ssrc = gst_rtcp_packet_rr_get_ssrc (&packet);
break;
case GST_RTCP_TYPE_APP:
case GST_RTCP_TYPE_RTPFB:
case GST_RTCP_TYPE_PSFB:
ssrc = gst_rtcp_packet_fb_get_sender_ssrc (&packet);
break;
default:
goto unexpected_rtcp;
}
gst_rtcp_buffer_unmap (&rtcp);
GST_DEBUG_OBJECT (demux, "received RTCP of SSRC %08x", ssrc);
srcpad = find_or_create_demux_pad_for_ssrc (demux, ssrc, RTCP_PAD);
if (srcpad == NULL)
goto create_failed;
/* push to srcpad */
ret = gst_pad_push (srcpad, buf);
if (ret != GST_FLOW_OK) {
/* check if the ssrc still there, may have been removed */
GST_PAD_LOCK (demux);
dpad = find_demux_pad_for_ssrc (demux, ssrc);
if (dpad == NULL || dpad->rtcp_pad != srcpad) {
/* SSRC was removed during the push ... ignore the error */
ret = GST_FLOW_OK;
}
GST_PAD_UNLOCK (demux);
}
gst_object_unref (srcpad);
return ret;
/* ERRORS */
invalid_rtcp:
{
/* this is fatal and should be filtered earlier */
GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
("Dropping invalid RTCP packet"));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
unexpected_rtcp:
{
GST_DEBUG_OBJECT (demux, "dropping unexpected RTCP packet");
gst_buffer_unref (buf);
return GST_FLOW_OK;
}
create_failed:
{
GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
("Could not create new pad"));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
static GstPad *
find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc,
PadType padtype)
{
GstPad *rtp_pad, *rtcp_pad;
GstElementClass *klass;
GstPadTemplate *templ;
gchar *padname;
GstRtpSsrcDemuxPad *demuxpad;
GstPad *retpad;
gulong rtp_block, rtcp_block;
GST_PAD_LOCK (demux);
demuxpad = find_demux_pad_for_ssrc (demux, ssrc);
if (demuxpad != NULL) {
gboolean forward = FALSE;
switch (padtype) {
case RTP_PAD:
retpad = gst_object_ref (demuxpad->rtp_pad);
if (!demuxpad->pushed_initial_rtp_events) {
forward = TRUE;
demuxpad->pushed_initial_rtp_events = TRUE;
}
break;
case RTCP_PAD:
retpad = gst_object_ref (demuxpad->rtcp_pad);
if (!demuxpad->pushed_initial_rtcp_events) {
forward = TRUE;
demuxpad->pushed_initial_rtcp_events = TRUE;
}
break;
default:
retpad = NULL;
g_assert_not_reached ();
}
GST_PAD_UNLOCK (demux);
if (forward)
forward_initial_events (demux, ssrc, retpad, padtype);
return retpad;
}
GST_DEBUG_OBJECT (demux, "creating new pad for SSRC %08x", ssrc);
klass = GST_ELEMENT_GET_CLASS (demux);
templ = gst_element_class_get_pad_template (klass, "src_%u");
padname = g_strdup_printf ("src_%u", ssrc);
rtp_pad = gst_pad_new_from_template (templ, padname);
g_free (padname);
templ = gst_element_class_get_pad_template (klass, "rtcp_src_%u");
padname = g_strdup_printf ("rtcp_src_%u", ssrc);
rtcp_pad = gst_pad_new_from_template (templ, padname);
g_free (padname);
/* wrap in structure and add to list */
demuxpad = g_new0 (GstRtpSsrcDemuxPad, 1);
demuxpad->ssrc = ssrc;
demuxpad->rtp_pad = rtp_pad;
demuxpad->rtcp_pad = rtcp_pad;
gst_pad_set_element_private (rtp_pad, demuxpad);
gst_pad_set_element_private (rtcp_pad, demuxpad);
demux->srcpads = g_slist_prepend (demux->srcpads, demuxpad);
gst_pad_set_query_function (rtp_pad, gst_rtp_ssrc_demux_src_query);
gst_pad_set_iterate_internal_links_function (rtp_pad,
gst_rtp_ssrc_demux_iterate_internal_links_src);
gst_pad_set_event_function (rtp_pad, gst_rtp_ssrc_demux_src_event);
gst_pad_use_fixed_caps (rtp_pad);
gst_pad_set_active (rtp_pad, TRUE);
gst_pad_set_event_function (rtcp_pad, gst_rtp_ssrc_demux_src_event);
gst_pad_set_iterate_internal_links_function (rtcp_pad,
gst_rtp_ssrc_demux_iterate_internal_links_src);
gst_pad_use_fixed_caps (rtcp_pad);
gst_pad_set_active (rtcp_pad, TRUE);
if (padtype == RTP_PAD) {
demuxpad->pushed_initial_rtp_events = TRUE;
forward_initial_events (demux, ssrc, rtp_pad, padtype);
} else if (padtype == RTCP_PAD) {
demuxpad->pushed_initial_rtcp_events = TRUE;
forward_initial_events (demux, ssrc, rtcp_pad, padtype);
} else {
g_assert_not_reached ();
}
gst_element_add_pad (GST_ELEMENT_CAST (demux), rtp_pad);
gst_element_add_pad (GST_ELEMENT_CAST (demux), rtcp_pad);
switch (padtype) {
case RTP_PAD:
retpad = gst_object_ref (demuxpad->rtp_pad);
break;
case RTCP_PAD:
retpad = gst_object_ref (demuxpad->rtcp_pad);
break;
default:
retpad = NULL;
g_assert_not_reached ();
}
gst_object_ref (rtp_pad);
gst_object_ref (rtcp_pad);
rtp_block = gst_pad_add_probe (rtp_pad, GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM,
NULL, NULL, NULL);
rtcp_block = gst_pad_add_probe (rtcp_pad, GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM,
NULL, NULL, NULL);
GST_PAD_UNLOCK (demux);
g_signal_emit (G_OBJECT (demux),
gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD], 0, ssrc, rtp_pad);
gst_pad_remove_probe (rtp_pad, rtp_block);
gst_pad_remove_probe (rtcp_pad, rtcp_block);
gst_object_unref (rtp_pad);
gst_object_unref (rtcp_pad);
return retpad;
}
/* with PAD_LOCK */
static GstRtpSsrcDemuxPad *
find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
{
GstPad *rtp_pad, *rtcp_pad;
GstElementClass *klass;
GstPadTemplate *templ;
gchar *padname;
GstRtpSsrcDemuxPad *demuxpad;
GstCaps *caps;
struct ForwardEventData fdata;
GST_DEBUG_OBJECT (demux, "creating pad for SSRC %08x", ssrc);
demuxpad = find_demux_pad_for_ssrc (demux, ssrc);
if (demuxpad != NULL) {
return demuxpad;
}
klass = GST_ELEMENT_GET_CLASS (demux);
templ = gst_element_class_get_pad_template (klass, "src_%u");
padname = g_strdup_printf ("src_%u", ssrc);
rtp_pad = gst_pad_new_from_template (templ, padname);
g_free (padname);
templ = gst_element_class_get_pad_template (klass, "rtcp_src_%u");
padname = g_strdup_printf ("rtcp_src_%u", ssrc);
rtcp_pad = gst_pad_new_from_template (templ, padname);
g_free (padname);
/* wrap in structure and add to list */
demuxpad = g_new0 (GstRtpSsrcDemuxPad, 1);
demuxpad->ssrc = ssrc;
demuxpad->rtp_pad = rtp_pad;
demuxpad->rtcp_pad = rtcp_pad;
fdata.ssrc = ssrc;
gst_pad_set_element_private (rtp_pad, demuxpad);
gst_pad_set_element_private (rtcp_pad, demuxpad);
demux->srcpads = g_slist_prepend (demux->srcpads, demuxpad);
gst_pad_set_query_function (rtp_pad, gst_rtp_ssrc_demux_src_query);
gst_pad_set_iterate_internal_links_function (rtp_pad,
gst_rtp_ssrc_demux_iterate_internal_links_src);
gst_pad_set_event_function (rtp_pad, gst_rtp_ssrc_demux_src_event);
gst_pad_use_fixed_caps (rtp_pad);
gst_pad_set_active (rtp_pad, TRUE);
fdata.pad = rtp_pad;
gst_pad_sticky_events_foreach (demux->rtp_sink, forward_sticky_events,
&fdata);
gst_pad_set_event_function (rtcp_pad, gst_rtp_ssrc_demux_src_event);
gst_pad_set_iterate_internal_links_function (rtcp_pad,
gst_rtp_ssrc_demux_iterate_internal_links_src);
gst_pad_use_fixed_caps (rtcp_pad);
gst_pad_set_active (rtcp_pad, TRUE);
fdata.pad = rtcp_pad;
gst_pad_sticky_events_foreach (demux->rtcp_sink, forward_sticky_events,
&fdata);
/* copy caps from input */
if ((caps = gst_pad_get_current_caps (demux->rtp_sink))) {
gst_pad_set_caps (rtp_pad, caps);
gst_caps_unref (caps);
}
if ((caps = gst_pad_get_current_caps (demux->rtcp_sink))) {
gst_pad_set_caps (rtcp_pad, caps);
gst_caps_unref (caps);
}
gst_element_add_pad (GST_ELEMENT_CAST (demux), rtp_pad);
gst_element_add_pad (GST_ELEMENT_CAST (demux), rtcp_pad);
g_signal_emit (G_OBJECT (demux),
gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD], 0, ssrc, rtp_pad);
return demuxpad;
}
static GstFlowReturn
gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad, GstBuffer * buf)
{
GstFlowReturn ret;
GstRtpSsrcDemux *demux;
guint32 ssrc;
GstRtpSsrcDemuxPad *dpad;
GstRTCPPacket packet;
demux = GST_RTP_SSRC_DEMUX (GST_OBJECT_PARENT (pad));
if (!gst_rtcp_buffer_validate (buf))
goto invalid_rtcp;
if (!gst_rtcp_buffer_get_first_packet (buf, &packet))
goto invalid_rtcp;
/* first packet must be SR or RR or else the validate would have failed */
switch (gst_rtcp_packet_get_type (&packet)) {
case GST_RTCP_TYPE_SR:
/* get the ssrc so that we can route it to the right source pad */
gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, NULL, NULL, NULL,
NULL);
break;
default:
goto unexpected_rtcp;
}
GST_DEBUG_OBJECT (demux, "received RTCP of SSRC %08x", ssrc);
GST_PAD_LOCK (demux);
dpad = find_demux_pad_for_ssrc (demux, ssrc);
if (dpad == NULL) {
GST_DEBUG_OBJECT (demux, "creating pad for SSRC %08x", ssrc);
if (!(dpad = create_demux_pad_for_ssrc (demux, ssrc, -1)))
goto create_failed;
}
GST_PAD_UNLOCK (demux);
/* push to srcpad */
ret = gst_pad_push (dpad->rtcp_pad, buf);
return ret;
/* ERRORS */
invalid_rtcp:
{
/* this is fatal and should be filtered earlier */
GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
("Dropping invalid RTCP packet"));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
unexpected_rtcp:
{
GST_DEBUG_OBJECT (demux, "dropping unexpected RTCP packet");
gst_buffer_unref (buf);
return GST_FLOW_OK;
}
create_failed:
{
GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
("Could not create new pad"));
GST_PAD_UNLOCK (demux);
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
