Rename opus_input -> opus_encode_sink.
Rename opus_output -> opus_decode_sink.
opus_encode_sink should act as a sink, not a source.
Formatting cleanup.
Change audio_sink API.
opus_decode_sink is an audio_sink.
Wrap opus_encode_sink into voicebox namespace.
Fix buffer name.
Use selected sample rate for opus decoder.
Missed namespace close.
Use sink chain instead of queues.
Remove all sender references.