Lars Immisch 67adbf0524 Add a (naive) loopback implementation (#132) ...

* WIP

* Implement alsapcm_polldescriptors_revents and alspcm_avail

* Open/close the playback device when idle.

It takes a long time until it's stopped, though.

* open/close logic of playback device

* Fix opening logic, make period size divisible by 6

* Be less verbose in level info

* Extra argument for output mixer card index

Sometimes, this cannot be deduced from the output device

* Better silence detection

* Run run_after_stop when idle on startup

2023-09-12 21:04:02 +02:00

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