Gigabit app not streaming audio

[gerrykurz]

I have modified the gigabit avb app to run on my hardware and it is not streaming any audio. It is sending and receiving ethernet packets as it is registering as an avb device on the macbook.

I know my hardware works as I have a modified version of the avb endpoint 6.1.1 app that works fine.

Any ideas how I debug this?

[srinie]

Hi,
Some useful tips:
- Enable the debug prints and check for the drop packets
- a quick check may be to do with the firmware selection (Gigabit avb uses 7.x version and not 6.x versions!)

[larry]

Are PTP roles resolved and clock synchronised on the network?

Has the audio stream registered successfully?

Is media clock locked and recovering properly?

Any 1722 traffic on the network? Suggest tcpdump or Wireshark on the host.

[gerrykurz]

Are PTP roles resolved and clock synchronised on the network?

Yes

Has the audio stream registered successfully?

Yes

Is media clock locked and recovering properly?

Yes

Any 1722 traffic on the network? Suggest tcpdump or Wireshark on the host.

Yes

a quick check may be to do with the firmware selection (Gigabit avb uses 7.x version and not 6.x versions!)

Not sure what you mean by firmware versions

[srinie]

I have modified the gigabit avb app to run on my hardware

I know my hardware works as I have a modified version of the avb endpoint 6.1.1 app that works fine.

gigabit avb app + compatible AVB firmware is avb 7.x
Hope you ve taken any needed changes or customizations to run GigE hardware with avb 6.x?

Regards,
/srini

[gerrykurz]

I am not running GigE hardware.

I am running 100 MBit ethernet hardware and I have modifed the GigE avb endpoint application to run with the 100 MBit real time ethernet interface. Because all the ethernet instances in the new library share a common api, this is not hard to do.

[larry]

So there is 1722 traffic on the network, but no audio? If that's the case, I would look into the I2S driving task and then media FIFOs to see where is audio getting stuck.

[gerrykurz]

i have been trying to capture the 1722 data packets on the network but none of the tools seem able to capture vlan tagged packets. I have tried Wireshark, Packet Peeper and tcpdump.

Anybody know how to capture vlan tagged packets on MAC OSX 10.10.4 Yosemite?