69 lines
2.7 KiB
Plaintext
69 lines
2.7 KiB
Plaintext
$OpenBSD: patch-jackd_jackd_1_in,v 1.2 2012/01/24 08:03:52 ajacoutot Exp $
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--- jackd/jackd.1.in.orig Thu Jun 9 01:54:48 2011
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+++ jackd/jackd.1.in Mon Jan 23 14:21:11 2012
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@@ -28,8 +28,9 @@ For the latest JACK information, please consult the we
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.br
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Select the audio interface backend. The current list of supported
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backends is: \fBalsa\fR, \fBcoreaudio\fR, \fBdummy\fR, \fBfreebob\fR,
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-\fBoss\fR \fBsun\fR and \fBportaudio\fR. They are not all available
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-on all platforms. All \fIbackend\-parameters\fR are optional.
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+\fBoss\fR \fBsun\fR \fBsndio\fR and \fBportaudio\fR. They are not
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+all available on all platforms. All \fIbackend\-parameters\fR are
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+optional.
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.TP
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\fB\-h, \-\-help\fR
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@@ -417,6 +418,43 @@ Specify output device for playback (default: /dev/audi
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.TP
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\fB\-b, \-\-ignorehwbuf \fIboolean\fR
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Specify, whether to ignore hardware period size (default: false)
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+.SS SNDIO BACKEND PARAMETERS
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+.TP
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+\fB\-r, \-\-rate \fIint\fR
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+Specify the sample rate. The default is 44100.
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+.TP
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+\fB\-p, \-\-period \fIint\fR
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+Specify the number of frames between JACK \fBprocess()\fR calls. This
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+value must be a power of 2, and the default is 1024. If you need low
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+latency, set \fB\-p\fR as low as you can go without seeing xruns. A larger
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+period size yields higher latency, but makes xruns less likely. The JACK
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+capture latency in seconds is \fB\-\-period\fR divided by \fB\-\-rate\fR.
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+Note that this value is mostly advisory when aucat server is running
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+and may be updated internally.
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+.TP
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+\fB\-n, \-\-nperiods \fIint\fR
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+Specify the number of periods in the hardware buffer. The default is
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+2. The period size (\fB\-p\fR) times \fB\-\-nperiods\fR times four
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+(assuming 2 channels 16-bit samples) is the JACK buffer size in bytes.
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+The JACK output latency in seconds is \fB\-\-nperiods\fR times
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+\fB\-\-period\fR divided by \fB\-\-rate\fR.
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+Note that this value is mostly advisory when aucat server is running
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+and may be updated internally.
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+.TP
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+\fB\-w, \-\-wordlength \fIint\fR
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+Specify the sample size in bits. The default is 16.
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+.TP
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+\fB\-i, \-\-inchannels \fIint\fR
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+Specify how many channels to capture (default: 2)
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+.TP
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+\fB\-o, \-\-outchannels \fIint\fR
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+Specify number of playback channels (default: 2)
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+.TP
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+\fB\-d, \-\-device \fIdevice_file\fR
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+Specify device for capture and playback (default: NULL)
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+.TP
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+\fB\-b, \-\-ignorehwbuf \fIboolean\fR
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+Specify, whether to ignore hardware period size (default: false)
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.SS PORTAUDIO BACKEND PARAMETERS
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.TP
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\fB\-c \-\-channel\fR
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@@ -467,6 +505,8 @@ Print usage message for the parameters specific to eac
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\fBjackd \-d oss \-\-help\fR
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.br
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\fBjackd \-d sun \-\-help\fR
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+.br
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+\fBjackd \-d sndio \-\-help\fR
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.br
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\fBjackd \-d portaudio \-\-help\fR
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.PP
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