audio event interface listening to multiple sources

[bs-eng]

Hi!

I am new to ESP ADF. I tried many examples and are confident with most components by now.

One thing that I have not yet understood is the audio event interface.

I am trying to collect events from different sources (periph, audio-pipeline) into one in order to handle those events in one place. This is necessary due to system architecture.

My question:

1. Does the audio_event_iface_listen() block until an event is received, or does it return immediately?
   I am asking because I see in all examples that use this interface function to also add a delay until the next event is handled. Typically in the form of:

   Code: Select all

   vTaskDelay(100/portTICK_PERIOD_MS);

   However I do not want to wait until the next event is processed.
2. How can I get the listener to subscribe to more than one source? If I want periph-events and audiopipeline-events from the same event interface?

Thanks for any pointers and hints!
Cheers
JR