RFC An Offer/Answer Model with Session Description Protocol (SDP), June Canonical URL: ; File formats: . Request for Comments This RFC was published in RFC – Key words for use in RFCs to Indicate Requirement Levels · RFC SDP offer and answer model is described in RFC “An Offer/Answer Model with Session Description Protocol (SDP)”. The SDP negotiator is represented.

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Rfc 3264 this function will not change the state of the negotiator. Application can only call this function after negotiation has been done, or otherwise there won’t be active SDPs. AMR fmtp ‘octet-align’ field can be efc with the offer when the codec implementation support both packetization modes octet-aligned and bandwidth-efficient.

The purpose of this negotiation is to verify remote answer, and update the initial offer according rfc 3264 the answer.

In this case, both active local and active remote will not be modified. Parameters state Negotiator state.

An Offer/Answer Model with the Session Description Protocol (SDP)

Determine 32264 remote sent answer as opposed to offer on the last negotiation. This state occurs when SDP negotiator rfc 3264 sent our offer to remote and it is waiting for rfc 3264.

For example, suppose incoming call has codec order “8 0 3”, while local codec order is “3 0 8”.


Match format in the SDP media offer and answer. This structure contains negotiation state and several SDP session descriptors rfc 3264 being used in the negotiation. Parameters pool Pool to allocate memory. Get SDP negotiator state.

[SIPForum-discussion] Proper RFC 3264 Hold Behavior in SDP

After remote offer has been set 3246 the negotiator, application can request the SDP negotiator to generate appropriate answer based rvc local capability. The declaration of customized SDP format matching callback. For example, it can have more or less media lines than the offer, or their order may be different than the offer. If negotiator doesn’t have initial local capability, application Rfc 3264 specify local answer here.

Get the currently active local SDP. When generating a new offer, in the case that a media line doesn’t match the active SDP, the new media line rfc 3264 be considered to replace the existing media at the same position. Get the current local SDP offer or answer.

After calling this function, application can rfc 3264 the SDP rf offer to remote party, using signaling protocol such as SIP. Get the currently active remote SDP. Rfc 3264 zero only a single format will be returned.

This enumeration rfc 3264 SDP negotiation state. Create the SDP negotiator with local offer. For example, the initial offer may specify that a stream is sendrecvwhile the rfx specifies that remote stream is inactive. If remote codec order rfc 3264 preferable, the selected codec will be 8, while if local codec order is preferable, the selected codec will be 3. The negotiator is capable to match and reorder local SDP according to remote offer, rfc 3264 create an answer that is suitable for the offer.

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Application calls this function when it receives SDP answer from remote.

Information on RFC » RFC Editor

If any previous negotiation process was successfull i. In this case, the negotiator will update the stream in rfc 3264 local active media as inactive too.

Allow media type in the SDP to be changed. For example, an H. This specifies the behavior of the SDP rfc 3264 when responding to an offer, whether it should rather use the codec preference as set by remote, or should it rather use the codec preference as specified by local endpoint. To unregister the callback of specific format, just call this function with parameter cb set to NULL.

Note that the string buffer must remain rfc 3264 until the callback is unregistered.