Automatically restart failed/disconnected tuners and channels

[ArrEssJay]

Feb 13th nightly build. macos 11.7 x64.

Approximately every 24-72 hours, USB transfers from an rtl2382 fail due to a LIBUSB_ERROR_OTHER, which escalates to LIBUSB_ERROR_NO_DEVICE. The device was not unplugged - most recent occurrence was 3am.

Manually disabling/enabling the tuner and starting all channels (including those marked auto-start) temporarily resolves the problem.

Noted that it is likely that this is due to a disconnect of the USB device not a driver issue -> I will check cables/supply voltages etc.

In any case, automatically attempting to restart failed tuners with some back-off strategy would be worth considering as a contingency. Tuners do get accidentally unplugged, and unexpected resets of USB devices do happen.

A user cannot reasonably guarantee that this won't be the case, nor be expected to notice and resolve the situation manually when it is a transient and recoverable, especially on a headless system feeding a streaming service. We know at a minimum the USB bus/port the device is connected to for tracking purposes.

In this situation, if a tuner is restarted, it seems appropriate that channels are also started as necessary to match their state prior to the error.

2024-04-18 02:53:50.719 ERROR i.g.d.s.t.u.USBTunerController - Attempt to submit USB transfer buffer failed with status [LIBUSB_ERROR_OTHER] - this may be temporary and has happened [4] time(s) so far.  Transfer buffer holding queue (error/total) [4/8]  [753MB/2GB 27%]

2024-04-18 02:53:50.719 ERROR i.g.d.s.t.u.USBTunerController - Attempt to submit USB transfer buffer failed with status [LIBUSB_ERROR_NO_DEVICE] - this may be temporary and has happened [5] time(s) so far.  Transfer buffer holding queue (error/total) [5/8]  [753MB/2GB 27%]

2024-04-18 02:53:50.719 ERROR i.g.d.s.t.u.USBTunerController - Attempt to submit USB transfer buffer failed with status [LIBUSB_ERROR_NO_DEVICE] - this may be temporary and has happened [6] time(s) so far.  Transfer buffer holding queue (error/total) [6/8]  [753MB/2GB 27%]

2024-04-18 02:53:50.719 ERROR i.g.d.s.t.u.USBTunerController - Attempt to submit USB transfer buffer failed with status [LIBUSB_ERROR_NO_DEVICE] - this may be temporary and has happened [7] time(s) so far.  Transfer buffer holding queue (error/total) [7/8]  [753MB/2GB 27%]

2024-04-18 02:53:50.728 ERROR i.g.d.s.t.u.USBTunerController - Attempt to submit USB transfer buffer failed with status [LIBUSB_ERROR_NO_DEVICE] - this may be temporary and has happened [8] time(s) so far.  Transfer buffer holding queue (error/total) [8/8]  [753MB/2GB 27%]

2024-04-18 02:53:50.728 ERROR i.g.d.s.t.u.USBTunerController - Maximum USB transfer buffer errors reached - transfer buffers exhausted - shutting down USB tuner  [753MB/2GB 27%]

2024-04-18 02:53:50.729 INFO  i.g.d.s.t.m.DiscoveredTuner - Tuner Error - Stopping - RTL-2832 USB Bus:20 Port:1.1 Error: USB Error - Transfer Buffers Exhausted  [754MB/2GB 27%]

2024-04-18 02:53:50.730 INFO  i.g.d.s.t.m.DiscoveredTuner - Stopping Tuner: RTL-2832 USB Bus:20 Port:1.1  [754MB/2GB 27%]