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Differential D48031

sound: Bail out early if a format is not supported
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Authored by christos on Wed, Dec 11, 4:47 PM.
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markj
emaste
dev_submerge.ch
Summary

If a format is unsupported, the feeder_build_* functions will fail
anyway, so bail out early to avoid unnecessary computation.

This is also needed by a series of upcoming patches to the feeder
framework.

Sponsored by: The FreeBSD Foundation
MFC after: 2 days

Diff Detail

Repository
rG FreeBSD src repository
Lint
Lint Skipped
Unit
Tests Skipped
Build Status
Buildable 61087
Build 57971: arc lint + arc unit

Event Timeline

christos created this revision.Wed, Dec 11, 4:47 PM
Herald added a subscriber: imp. · View Herald TranscriptWed, Dec 11, 4:47 PM
christos requested review of this revision.Wed, Dec 11, 4:47 PM
Harbormaster completed remote builds in B61087: Diff 147819.Wed, Dec 11, 4:47 PM
christos added inline comments.Wed, Dec 11, 5:03 PM
sys/dev/sound/pcm/feeder_chain.c
709

Maybe ENODEV would be better.

christos mentioned this in D47932: sound: Refactor the format conversion framework.Wed, Dec 11, 7:45 PM
dev_submerge.ch added inline comments.Fri, Dec 13, 2:17 PM
sys/dev/sound/pcm/feeder_chain.c
572–573

This seems redundant with AFMT_CONVERTIBLE from sound.h?

703–709

Below we handle *any* format with bitperfect / passthrough. If these cases never hit feeder_chain() then the code below is superfluous, but I suspect it's not. Which means we cannot bail out early here?

christos added inline comments.Sun, Dec 15, 11:01 PM
sys/dev/sound/pcm/feeder_chain.c
572–573

I am aware of it, but I thought the "convertible" part in the name would make the meaning of the operation non-obvious. I can however, use AFMT_CONVERTIBLE and add a comment, which should be fine.

703–709

That's a good point. I think the check could be moved to the else (non-bitperfect/non-passthrough) case instead.

christos updated this revision to Diff 148253.Thu, Dec 19, 5:51 PM
christos marked 2 inline comments as done.
  • Use AFMT_CONVERTIBLE.
  • Move check inside non-bitperfect/passthrough case.
Harbormaster completed remote builds in B61266: Diff 148253.Thu, Dec 19, 5:51 PM
christos added a comment.Sun, Dec 29, 8:26 PM

Bump.

christos updated this revision to Diff 148537.Sun, Dec 29, 8:29 PM

Rebase.

Harbormaster completed remote builds in B61398: Diff 148537.Sun, Dec 29, 8:29 PM
christos added a comment.Tue, Jan 7, 6:03 PM

Bump.

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sys/
dev/
sound/
pcm/
12 lines

Diff 147819

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sys/dev/sound/pcm/feeder_chain.c

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