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206021e4d4
Two RTP Header extensions are very relevant for rtprtxsend/receive.
1. "urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id": will always be removed
2. "urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id": will be written
instead of the "rtp-stream-id" header extension.
Currently it's only a simple replacement of one header extension for
another however a future change would only add the relevant extension
based on some heuristics (like, video frames only on one of the rtp key
frame buffers, or only until the rtx ssrc has been validated by the peer)
in order to reduce the required bandwidth.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1759>
91 lines
2.9 KiB
C
91 lines
2.9 KiB
C
/* RTP Retransmission receiver element for GStreamer
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*
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* gstrtprtxreceive.h:
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*
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* Copyright (C) 2013 Collabora Ltd.
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* @author Julien Isorce <julien.isorce@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_RTP_RTX_RECEIVE_H__
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#define __GST_RTP_RTX_RECEIVE_H__
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#include <gst/gst.h>
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#include <gst/rtp/rtp.h>
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G_BEGIN_DECLS
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typedef struct _GstRtpRtxReceive GstRtpRtxReceive;
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typedef struct _GstRtpRtxReceiveClass GstRtpRtxReceiveClass;
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#define GST_TYPE_RTP_RTX_RECEIVE (gst_rtp_rtx_receive_get_type())
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#define GST_RTP_RTX_RECEIVE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_RTX_RECEIVE, GstRtpRtxReceive))
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#define GST_RTP_RTX_RECEIVE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_RTX_RECEIVE, GstRtpRtxReceiveClass))
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#define GST_RTP_RTX_RECEIVE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_RTP_RTX_RECEIVE, GstRtpRtxReceiveClass))
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#define GST_IS_RTP_RTX_RECEIVE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_RTX_RECEIVE))
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#define GST_IS_RTP_RTX_RECEIVE_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_RTX_RECEIVE))
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#define GST_RTP_RTX_RECEIVE_CAST(obj) ((GstRtpRtxReceive *)(obj))
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struct _GstRtpRtxReceive
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{
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GstElement element;
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/* pad */
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GstPad *sinkpad;
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GstPad *srcpad;
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/* retrieve associated master stream from rtx stream
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* it also works to retrieve rtx stream from master stream
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* as we make sure all ssrc are unique */
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GHashTable *ssrc2_ssrc1_map;
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GstStructure *external_ssrc_map;
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/* contains seqnum of request packets of whom their ssrc have
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* not been associated to a rtx stream yet */
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GHashTable *seqnum_ssrc1_map;
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/* rtx pt (uint) -> origin pt (uint) */
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GHashTable *rtx_pt_map;
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/* origin pt (string) -> rtx pt (uint) */
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GstStructure *rtx_pt_map_structure;
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/* statistics */
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guint num_rtx_requests;
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guint num_rtx_packets;
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guint num_rtx_assoc_packets;
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GstClockTime last_time;
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GstRTPHeaderExtension *rid_stream;
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GstRTPHeaderExtension *rid_repaired;
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GstBuffer *dummy_writable;
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};
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struct _GstRtpRtxReceiveClass
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{
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GstElementClass parent_class;
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};
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GType gst_rtp_rtx_receive_get_type (void);
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GST_ELEMENT_REGISTER_DECLARE (rtprtxreceive);
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G_END_DECLS
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#endif /* __GST_RTP_RTX_RECEIVE_H__ */
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