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srtp: Implement SRTCP demultiplexing

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Separate multiplexed RTP and RTCP if they arrive
on the rtp_sink pad.
This commit is contained in:
Olivier Crête 2013-04-04 17:59:01 -04:00
parent 898966a44c
commit 8c76d7c77e
1 changed files with 22 additions and 12 deletions
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34
ext/srtp/gstsrtpdec.c
View file

@ -511,26 +511,34 @@ init_session_stream (GstSrtpDec * filter, guint32 ssrc,
*/
static GstSrtpDecSsrcStream *
validate_buffer (GstSrtpDec * filter, GstBuffer * buf, guint32 * ssrc,
gboolean is_rtcp)
gboolean * is_rtcp)
{
GstSrtpDecSsrcStream *stream = NULL;
if (!is_rtcp) {
if (!(*is_rtcp)) {
GstRTPBuffer rtpbuf = GST_RTP_BUFFER_INIT;
if (!gst_rtp_buffer_map (buf, GST_MAP_READ, &rtpbuf)) {
GST_WARNING_OBJECT (filter, "Invalid SRTP packet");
return NULL;
if (gst_rtp_buffer_map (buf, GST_MAP_READ, &rtpbuf)) {
if (gst_rtp_buffer_get_payload_type (&rtpbuf) < 64
|| gst_rtp_buffer_get_payload_type (&rtpbuf) > 80) {
*ssrc = gst_rtp_buffer_get_ssrc (&rtpbuf);
gst_rtp_buffer_unmap (&rtpbuf);
goto have_ssrc;
}
gst_rtp_buffer_unmap (&rtpbuf);
}
}
*ssrc = gst_rtp_buffer_get_ssrc (&rtpbuf);
gst_rtp_buffer_unmap (&rtpbuf);
} else if (!rtcp_buffer_get_ssrc (buf, ssrc)) {
if (rtcp_buffer_get_ssrc (buf, ssrc)) {
*is_rtcp = TRUE;
} else {
GST_WARNING_OBJECT (filter, "No SSRC found in buffer");
return NULL;
}
have_ssrc:
stream = find_stream_by_ssrc (filter, *ssrc);
if (stream)
@ -851,7 +859,7 @@ gst_srtp_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf,
/* Check if this stream exists, if not create a new stream */
if (!(stream = validate_buffer (filter, buf, &ssrc, is_rtcp))) {
if (!(stream = validate_buffer (filter, buf, &ssrc, &is_rtcp))) {
GST_OBJECT_UNLOCK (filter);
GST_WARNING_OBJECT (filter, "Invalid buffer, dropping");
goto drop_buffer;
@ -931,10 +939,12 @@ unprotect:
push_out:
/* Push buffer to source pad */
otherpad = (GstPad *) gst_pad_get_element_private (pad);
if (is_rtcp)
otherpad = filter->rtcp_srcpad;
else
otherpad = filter->rtp_srcpad;
ret = gst_pad_push (otherpad, buf);
return ret;
drop_buffer: