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rtpmanager: consider UDP and IP headers in bandwidth calculation

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According to RFC3550 lower-level headers should be considered for
bandwidth calculation.

See https://tools.ietf.org/html/rfc3550#section-6.2 paragraph 4:

  Bandwidth calculations for control and data traffic include
  lower-layer transport and network protocols (e.g., UDP and IP) since
  that is what the resource reservation system would need to know.

Fix the source data to accommodate that.

Assume UDPv4 over IP for now, this is a simplification but it's good
enough for now.

While at it define a constant and use that instead of a magic number.

NOTE: this change basically reverts the logic of commit 529f443a6
(rtpsource: use payload size to estimate bitrate, 2010-03-02)
This commit is contained in:
Antonio Ospite 2019-06-21 17:46:36 +02:00
parent 4146dc905d
commit 9d800cad43
3 changed files with 7 additions and 4 deletions
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2
gst/rtpmanager/rtpsession.c
View file

@ -673,7 +673,7 @@ rtp_session_init (RTPSession * sess)
sess->rtcp_rs_bandwidth = DEFAULT_RTCP_RS_BANDWIDTH;
/* default UDP header length */
sess->header_len = 28;
sess->header_len = UDP_IP_HEADER_OVERHEAD;
sess->mtu = DEFAULT_RTCP_MTU;
sess->probation = DEFAULT_PROBATION;

6
gst/rtpmanager/rtpsource.c
View file

@ -1188,8 +1188,8 @@ update_receiver_stats (RTPSource * src, RTPPacketInfo * pinfo,
src->stats.octets_received += pinfo->payload_len;
src->stats.bytes_received += pinfo->bytes;
src->stats.packets_received += pinfo->packets;
/* for the bitrate estimation */
src->bytes_received += pinfo->payload_len;
/* for the bitrate estimation consider all lower level headers */
src->bytes_received += pinfo->bytes;
GST_LOG ("seq %u, PC: %" G_GUINT64_FORMAT ", OC: %" G_GUINT64_FORMAT,
seqnr, src->stats.packets_received, src->stats.octets_received);
@ -1319,7 +1319,7 @@ rtp_source_send_rtp (RTPSource * src, RTPPacketInfo * pinfo)
/* update stats for the SR */
src->stats.packets_sent += pinfo->packets;
src->stats.octets_sent += pinfo->payload_len;
src->bytes_sent += pinfo->payload_len;
src->bytes_sent += pinfo->bytes;
running_time = pinfo->running_time;

3
gst/rtpmanager/rtpstats.h
View file

@ -27,6 +27,9 @@
#include <gst/rtp/rtp.h>
#include <gio/gio.h>
/* UDP/IP is assumed for bandwidth calculation */
#define UDP_IP_HEADER_OVERHEAD 28
/**
* RTPSenderReport:
*