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| author |   jakemsr <jakemsr@openbsd.org> | 2008-05-26 00:36:08 +0000 |
|---|---|---|
| committer | jakemsr <jakemsr@openbsd.org> | 2008-05-26 00:36:08 +0000 |
| commit | f20336e6f7728a11f27734ef4142df66921c107b (patch) | |
| tree | a38230db9798863e8c3515fd9467568ca4b6cb99 | |
| parent | use ac97 default parameters for auich(4), auixp(4) and auvia(4). (diff) | |
| download | wireguard-openbsd-f20336e6f7728a11f27734ef4142df66921c107b.tar.xz wireguard-openbsd-f20336e6f7728a11f27734ef4142df66921c107b.zip | |
explain why, even though we support "sticky" block sizes, setting block
sizes before other parameters can cause problems.
ok ratchov@
| -rw-r--r-- | share/man/man4/audio.4 | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/share/man/man4/audio.4 b/share/man/man4/audio.4 index 0c54211e815..53dcbcace0d 100644 --- a/share/man/man4/audio.4 +++ b/share/man/man4/audio.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: audio.4,v 1.52 2008/04/21 00:32:42 jakemsr Exp $ +.\" $OpenBSD: audio.4,v 1.53 2008/05/26 00:36:08 jakemsr Exp $ .\" $NetBSD: audio.4,v 1.20 1998/05/28 17:27:15 augustss Exp $ .\" .\" Copyright (c) 1996 The NetBSD Foundation, Inc. @@ -35,7 +35,7 @@ .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE .\" POSSIBILITY OF SUCH DAMAGE. .\" -.Dd $Mdocdate: April 21 2008 $ +.Dd $Mdocdate: May 26 2008 $ .Dt AUDIO 4 .Os .Sh NAME @@ -519,6 +519,20 @@ even when the encoding is changed. The stickiness can be cleared by reopening the device or setting the .Va block_size to 0. +Care should be taken when setting the +.Va block_size +before other parameters. +If the device does not natively support the audio parameters, then the +internal block size may be scaled to a larger size to accomodate +conversion to a native format. +If the +.Va block_size +has been set, the internal block size will not be rescaled when the +parameters, and thus possibly the scaling factor, change. +This can result in a block size much larger than was orginally requested. +It is recommended to set +.Va block_size +at the same time as, or after all other parameters have been set. .Pp The .Va seek |