Detect available output sample formats, translate samples.

[mdwn]

Device sample formats are now autodetected and song samples are translated into the appropriate format for these devices. This should make MacOS support easier, since it looks like many of the devices there only support the float output format.

Closes #51

[codecov]

Codecov Report

Attention: Patch coverage is 6.25000% with 45 lines in your changes missing coverage. Please review.

Project coverage is 46.60%. Comparing base (a9628d2) to head (d271040).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/audio/cpal.rs	6.25%	45 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #54      +/-   ##
==========================================
- Coverage   47.00%   46.60%   -0.40%     
==========================================
  Files          23       23              
  Lines        1368     1384      +16     
==========================================
+ Hits          643      645       +2     
- Misses        725      739      +14     

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[ahcm]

It seems this fixes the problem by skipping the problematic entry/ies.
Enabling error output I get:

2024-12-13T19:37:16.324546Z ERROR mtrack::audio::cpal: Error getting output configs err="A backend-specific error has occurred: Invalid property value"
Devices:
- MacBook Air-Lautsprecher (Channels=2) (CoreAudio)
- Microsoft Teams Audio (Channels=2) (CoreAudio)

Is this a cpal problem?

[mdwn]

I think you're right. I just added the host_id and device_name to the output for that call, do you mind trying against the most recent pull?

[ahcm]

If I switch the system default speaker to the dongle I get:

$ ./target/release/mtrack devices
Devices:
- AKG N9 Hybrid (Channels=2) (CoreAudio)
- Microsoft Teams Audio (Channels=2) (CoreAudio)

Otherwise:

$ ./target/release/mtrack devices
Devices:
- MacBook Air-Lautsprecher (Channels=2) (CoreAudio)
- Microsoft Teams Audio (Channels=2) (CoreAudio)

[mdwn]

That is bizarre. So cpal doesn't report any available outputs there, it seems -- I'm not totally sure what I can do in this situation, unfortunately. Do you have any other apps open that might be interfering?

[ahcm]

It's a problem with cpal. There is even a merge request open since september last year:
RustAudio/cpal#799

I added some output form the cpal example enumerate.
Hopefully this leads to a merge.

Thanks!