* join/begin mrp protocol for attributes of mvrp and msrp within stream_activate.
* Creation of the attribute done on stream creation during es_buidler
AVB_MRP_SEND_NEW was defined as 0, making it indistinguishable from
"no pending send" in the MSRP and MVRP event handlers which check
`if (!pending_send)`. This meant that when an attribute was first
declared (applicant state VN or AN), the NEW message was silently
dropped instead of being transmitted on the network.
Fix by shifting all AVB_MRP_SEND_* values to start at 1, so that 0
unambiguously means "no send pending". Update the MSRP and MVRP
encoders to subtract 1 when encoding to the IEEE 802.1Q wire format
(which uses 0-based event values).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The msrp_notify() and mvrp_notify() functions call dispatch table
notify callbacks without checking for NULL. In MSRP, the
TALKER_FAILED attribute type has a NULL notify callback, which would
crash if a talker-failed attribute received a registrar state change
notification (e.g. RX_NEW triggering NOTIFY_NEW).
Add NULL checks before calling the dispatch notify callbacks, matching
the defensive pattern used in the encode path.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add in input/output stream, setup the talker/listeners.
Implement IEC61883 audio packets, send and receive data.
Implement talker encoding.
With this, audio can be sent and received from MOTU M64.
