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A number of small fixes from Sergey Svishchev.

This commit is contained in:
augustss 2002-02-02 11:07:36 +00:00
parent 38462ff661
commit 9ce3f751cb
1 changed files with 16 additions and 8 deletions
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24
share/man/man4/audio.4
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@ -1,4 +1,4 @@
.\" $NetBSD: audio.4,v 1.44 2002/01/23 20:58:20 he Exp $
.\" $NetBSD: audio.4,v 1.45 2002/02/02 11:07:36 augustss Exp $
.\"
.\" Copyright (c) 1996 The NetBSD Foundation, Inc.
.\" All rights reserved.
@ -161,7 +161,9 @@ is not set) work properly for a mapped device.
.Pp
The audio device, like most devices, can be used in
.Va select ,
can be set in non-blocking mode and can be set to send a
can be set in non-blocking mode and can be set (with a
.Dv FIOASYNC
ioctl) to send a
.Dv SIGIO
when I/O is possible.
The mixer device can be set to generate a
@ -243,7 +245,7 @@ independently.
.It Dv AUDIO_GETIOFFS (audio_offset_t)
.It Dv AUDIO_GETOOFFS (audio_offset_t)
This command fetches the current offset in the input(output) buffer where
the hardware is putting(getting) data.
the audio hardware's DMA engine will be putting(getting) data.
It mostly useful when the device
buffer is available in user space via the
.Xr mmap 2
@ -263,7 +265,7 @@ Get or set audio information as encoded in the audio_info structure.
typedef struct audio_info {
struct audio_prinfo play; /* info for play (output) side */
struct audio_prinfo record; /* info for record (input) side */
u_int monitor_gain;
u_int monitor_gain; /* input to output mix */
/* BSD extensions */
u_int blocksize; /* H/W read/write block size */
u_int hiwat; /* output high water mark */
@ -337,7 +339,7 @@ struct audio_prinfo {
u_int sample_rate; /* sample rate in samples/s */
u_int channels; /* number of channels, usually 1 or 2 */
u_int precision; /* number of bits/sample */
u_int encoding; /* data encoding (AUDIO_ENCODING_* above) */
u_int encoding; /* data encoding (AUDIO_ENCODING_* below) */
u_int gain; /* volume level */
u_int port; /* selected I/O port */
u_long seek; /* BSD extension */
@ -528,8 +530,8 @@ or
.It Dv AUDIO_MIXER_DEVINFO (mixer_devinfo_t)
This command is used iteratively to fetch audio mixer device information
into the input/output mixer_devinfo_t argument.
To query all the supported encodings, start with an index field of
0 and continue with successive encodings (1, 2, ...) until the
To query all the supported devices, start with an index field of
0 and continue with successive devices (1, 2, ...) until the
command returns an error.
.Bd -literal
typedef struct mixer_devinfo {
@ -557,6 +559,7 @@ typedef struct mixer_devinfo {
struct audio_mixer_value {
audio_mixer_name_t units;
int num_channels;
int delta;
} v;
} un;
} mixer_devinfo_t;
@ -601,7 +604,7 @@ and
.Va prev
may be used by the hardware device driver to provide hints for the next
and previous devices in a related set (for example, the line in level
control would have the line in mute as its "next" value).
control would have the line in mute as its ``next'' value).
If there is no relevant next or previous value,
.Dv AUDIO_MIXER_LAST
is specified.
@ -650,6 +653,7 @@ For ports using the ISA bus:
.Xr ym 4
.br
For ports using the PCI bus:
.Xr auich 4 ,
.Xr auvia 4 ,
.Xr clcs 4 ,
.Xr clct 4 ,
@ -660,12 +664,16 @@ For ports using the PCI bus:
.Xr esm 4 ,
.Xr eso 4 ,
.Xr fms 4 ,
.Xr neo 4 ,
.Xr sv 4 ,
.Xr yds 4
.br
For ports using PCMCIA:
.Xr esl 4
.br
For ports using TurboChannel:
.Xr bba 4
.br
For ports using USB:
.Xr uaudio 4
.Sh BUGS