mirror of
https://github.com/pion/webrtc.git
synced 2025-10-31 10:46:39 +08:00
119 lines
3.0 KiB
Go
119 lines
3.0 KiB
Go
package sdp
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import (
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"strings"
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)
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// Marshal takes a SDP struct to text
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// https://tools.ietf.org/html/rfc4566#section-5
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// Session description
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// v= (protocol version)
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// o= (originator and session identifier)
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// s= (session name)
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// i=* (session information)
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// u=* (URI of description)
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// e=* (email address)
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// p=* (phone number)
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// c=* (connection information -- not required if included in
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// all media)
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// b=* (zero or more bandwidth information lines)
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// One or more time descriptions ("t=" and "r=" lines; see below)
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// z=* (time zone adjustments)
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// k=* (encryption key)
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// a=* (zero or more session attribute lines)
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// Zero or more media descriptions
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//
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// Time description
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// t= (time the session is active)
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// r=* (zero or more repeat times)
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//
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// Media description, if present
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// m= (media name and transport address)
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// i=* (media title)
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// c=* (connection information -- optional if included at
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// session level)
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// b=* (zero or more bandwidth information lines)
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// k=* (encryption key)
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// a=* (zero or more media attribute lines)
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func (s *SessionDescription) Marshal() (raw string) {
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raw += keyValueBuild("v=", s.Version.String())
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raw += keyValueBuild("o=", s.Origin.String())
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raw += keyValueBuild("s=", s.SessionName.String())
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if s.SessionInformation != nil {
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raw += keyValueBuild("i=", s.SessionInformation.String())
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}
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if s.URI != nil {
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uri := s.URI.String()
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raw += keyValueBuild("u=", &uri)
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}
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if s.EmailAddress != nil {
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raw += keyValueBuild("e=", s.EmailAddress.String())
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}
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if s.PhoneNumber != nil {
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raw += keyValueBuild("p=", s.PhoneNumber.String())
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}
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if s.ConnectionInformation != nil {
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raw += keyValueBuild("c=", s.ConnectionInformation.String())
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}
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for _, b := range s.Bandwidth {
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raw += keyValueBuild("b=", b.String())
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}
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for _, td := range s.TimeDescriptions {
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raw += keyValueBuild("t=", td.Timing.String())
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for _, r := range td.RepeatTimes {
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raw += keyValueBuild("r=", r.String())
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}
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}
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rawTimeZones := make([]string, 0)
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for _, z := range s.TimeZones {
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rawTimeZones = append(rawTimeZones, z.String())
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}
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if len(rawTimeZones) > 0 {
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timeZones := strings.Join(rawTimeZones, " ")
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raw += keyValueBuild("z=", &timeZones)
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}
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if s.EncryptionKey != nil {
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raw += keyValueBuild("k=", s.EncryptionKey.String())
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}
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for _, a := range s.Attributes {
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raw += keyValueBuild("a=", a.String())
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}
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for _, md := range s.MediaDescriptions {
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raw += keyValueBuild("m=", md.MediaName.String())
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if md.MediaTitle != nil {
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raw += keyValueBuild("i=", md.MediaTitle.String())
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}
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if md.ConnectionInformation != nil {
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raw += keyValueBuild("c=", md.ConnectionInformation.String())
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}
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for _, b := range md.Bandwidth {
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raw += keyValueBuild("b=", b.String())
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}
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if md.EncryptionKey != nil {
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raw += keyValueBuild("k=", md.EncryptionKey.String())
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}
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for _, a := range md.Attributes {
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raw += keyValueBuild("a=", a.String())
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}
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}
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return raw
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}
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