on_call_tx_offer property

Pointer<NativeFunction<Void Function(pjsua_call_id call_id, Pointer<Void> reserved, Pointer<pjsua_call_setting> opt)>> on_call_tx_offer
getter/setter pair

Notify application when call has received INVITE with no SDP offer. Application can update the call setting (e.g: add audio/video), or enable/disable codecs, or update other media session settings from within the callback, however, as mandated by the standard (RFC3261 section 14.2), it must ensure that the update overlaps with the existing media session (in codecs, transports, or other parameters) that require support from the peer, this is to avoid the need for the peer to reject the offer.

When this callback is not defined, the default behavior is to send SDP offer using current active media session (with all enabled codecs on each media type).

@param call_id The call index. @param reserved Reserved param, currently not used. @param opt The current call setting, application can update this setting for generating the offer.

Implementation

external ffi.Pointer<
    ffi.NativeFunction<
        ffi.Void Function(
            pjsua_call_id call_id,
            ffi.Pointer<ffi.Void> reserved,
            ffi.Pointer<pjsua_call_setting> opt)>> on_call_tx_offer;