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SDP attributes defined in RFC 6364

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SDP Elements for the Forward Error Correction (FEC) Framework
fec-source-flow,  fec-repair-flow,  repair-window

RFC 6364 – Section 4.4

a=fec-source-flow:   (media-level)
a=fec-repair-flow:   (media-level)
a=repair-window:   (media-level)


attribute-fields   =/
fec-repair-flow-line   =
"a=fec-repair-flow:"   SP   fec-encoding-id   [ ";"   SP   flow-preference ]
[ ";"   SP   sender-side-scheme-specific ]   [ ";"   SP   scheme-specific ]   CRLF

fec-encoding-id   =
"encoding-id="   enc-id

enc-id   =
1*DIGIT

flow-preference   =
"preference-lvl="   preference-level-of-the-flow

preference-level-of-the-flow   =
1*DIGIT

sender-side-scheme-specific   =
"ss-fssi="   sender-info

sender-info   =
element   *( ","   element )

element   =
name   ":"   value

name   =
token   =
1*<any CHAR except CTLs or separators>

value   =
*<any CHAR except CTLs or separators>

separator   =
"("   /   ")"   /   "<"   /   ">"   /   "@"   /
","   /   ";"   /   ":"   /   "\"   /   DQUOTE   /
"/"   /   "["   /   "]"   /   "?"   /   "="   /
"{"   /   "}"   /   SP   /   HTAB

scheme-specific   =
"fssi="   scheme-info

scheme-info   =
element   *( ","   element )

repair-window-line   =
"a=repair-window:"   window-size   unit   CRLF

window-size   =
%x31-39   *DIGIT
;  represented as 32-bit non-negative integers

unit   =
"ms"  /  "us"

fec-source-flow-line   =
"a=fec-source-flow:"   SP   source-id   [ ";"   SP   tag-length ]   CRLF

source-id   =
"id="   src-id

src-id   =
1*DIGIT
;  represented as 32-bit non-negative integers, and leading zeros are ignored

tag-length   =
"tag-len="   tlen

tlen   =
%x31-39   *DIGIT