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rtpbuffer: Link to an explanation why the seqnum comparison function does the right thing even for wraparounds

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Sebastian Dröge 2015-03-09 11:12:46 +01:00
parent f134072c66
commit 8f13a31bae
1 changed files with 5 additions and 0 deletions
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5
gst-libs/gst/rtp/gstrtpbuffer.c
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@ -1212,6 +1212,11 @@ gst_rtp_buffer_default_clock_rate (guint8 payload_type)
gint gint
gst_rtp_buffer_compare_seqnum (guint16 seqnum1, guint16 seqnum2) gst_rtp_buffer_compare_seqnum (guint16 seqnum1, guint16 seqnum2)
{ {
/* See http://en.wikipedia.org/wiki/Serial_number_arithmetic
* for an explanation why this does the right thing even for
* wraparounds, under the assumption that the difference is
* never bigger than 2**15 sequence numbers
*/
return (gint16) (seqnum2 - seqnum1); return (gint16) (seqnum2 - seqnum1);
} }