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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>
98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
/* RTP Retransmission sender element for GStreamer
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*
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* gstrtprtxsend.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_SEND_H__
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#define __GST_RTP_RTX_SEND_H__
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#include <gst/gst.h>
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#include <gst/rtp/rtp.h>
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#include <gst/base/gstdataqueue.h>
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G_BEGIN_DECLS
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typedef struct _GstRtpRtxSend GstRtpRtxSend;
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typedef struct _GstRtpRtxSendClass GstRtpRtxSendClass;
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#define GST_TYPE_RTP_RTX_SEND (gst_rtp_rtx_send_get_type())
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#define GST_RTP_RTX_SEND(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_RTX_SEND, GstRtpRtxSend))
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#define GST_RTP_RTX_SEND_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_RTX_SEND, GstRtpRtxSendClass))
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#define GST_RTP_RTX_SEND_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_RTP_RTX_SEND, GstRtpRtxSendClass))
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#define GST_IS_RTP_RTX_SEND(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_RTX_SEND))
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#define GST_IS_RTP_RTX_SEND_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_RTX_SEND))
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#define GST_RTP_RTX_SEND_CAST(obj) ((GstRtpRtxSend *)(obj))
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struct _GstRtpRtxSend
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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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/* rtp packets that will be pushed out */
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GstDataQueue *queue;
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/* ssrc -> SSRCRtxData */
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GHashTable *ssrc_data;
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/* rtx ssrc -> master ssrc */
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GHashTable *rtx_ssrcs;
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/* master ssrc -> rtx ssrc (property) */
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GstStructure *external_ssrc_map;
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/* orig pt (uint) -> rtx pt (uint) */
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GHashTable *rtx_pt_map;
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/* orig pt (string) -> rtx pt (uint) */
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GstStructure *rtx_pt_map_structure;
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/* orig pt (uint) -> clock rate (uint) */
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GHashTable *clock_rate_map;
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/* orig pt (string) -> clock rate (uint) */
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GstStructure *clock_rate_map_structure;
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/* buffering control properties */
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guint max_size_time;
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guint max_size_packets;
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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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/* list of relevant RTP Header Extensions */
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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 _GstRtpRtxSendClass
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{
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GstElementClass parent_class;
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};
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GType gst_rtp_rtx_send_get_type (void);
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GST_ELEMENT_REGISTER_DECLARE (rtprtxsend);
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G_END_DECLS
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#endif /* __GST_RTP_RTX_SEND_H__ */
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