AudioStream

Indicate if the audio stream has hungup.

Indicate in the input stream buffer is empty.

Indicate if the audio stream has hungup and been processed.

Indicate if the ASR stream is running.

Put a new item into the queue.

Async put a new item into the queue.

Send the hangup signal.

Async send the hangup signal.

Drain the responses from the provided iterator and put them into a queue.