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[src/trunk]: src/share/man/man9 Remove blank lines.
details: https://anonhg.NetBSD.org/src/rev/05bcf3a1962c
branches: trunk
changeset: 467399:05bcf3a1962c
user: mycroft <mycroft%NetBSD.org@localhost>
date: Wed Mar 24 06:46:30 1999 +0000
description:
Remove blank lines.
diffstat:
share/man/man9/audio.9 | 37 +++++--------------------------------
1 files changed, 5 insertions(+), 32 deletions(-)
diffs (226 lines):
diff -r 1493d1f25ff5 -r 05bcf3a1962c share/man/man9/audio.9
--- a/share/man/man9/audio.9 Wed Mar 24 06:27:49 1999 +0000
+++ b/share/man/man9/audio.9 Wed Mar 24 06:46:30 1999 +0000
@@ -1,4 +1,4 @@
-.\" $NetBSD: audio.9,v 1.9 1999/03/16 00:40:47 garbled Exp $
+.\" $NetBSD: audio.9,v 1.10 1999/03/24 06:46:30 mycroft Exp $
.\"
.\" Copyright (c) 1996 The NetBSD Foundation, Inc.
.\" All rights reserved.
@@ -95,9 +95,8 @@
void (*sw_code)__P((void *, u_char *, int));
int factor; /* coding space change */
};
-
.Ed
-
+.Pp
The high level audio driver attaches to the low level driver
when the latter calls
.Va audio_attach_mi .
@@ -110,7 +109,7 @@
void *hdl;
struct device *dev;
.Ed
-
+.Pp
The
.Va audio_hw_if
struct is as shown above and the
@@ -124,7 +123,6 @@
when the high level driver calls them.
.Va dev
is the device struct for the hardware device.
-
.Pp
The upper layer of the audio driver allocates one buffer for playing
and one for recording. It handles the buffering of data from the
@@ -134,14 +132,12 @@
another block a block of silence will be used instead. Furthermore,
if the user process does not read data quickly enough during recording
data will be thrown away.
-
.Pp
The fields of
.Va audio_hw_if
are described in some more detail below.
Some fields are optional and can be set to 0 if not needed.
-.Bl -tag -width indent -compact
-
+.Bl -tag -width indent
.It Dv int open(void *hdl, int flags)
is called when the audio device is opened. It should initialize
the hardware for I/O. Every successful call to
@@ -149,10 +145,8 @@
is matched by a call to
.Va close .
Return 0 on success, otherwise an error code.
-
.It Dv void close(void *hdl)
is called when the audio device is closed.
-
.It Dv int drain(void *hdl)
optional, is called before the device is closed or when
.Dv AUDIO_DRAIN
@@ -161,7 +155,6 @@
.Va close
is called.
Return 0 on success, otherwise an error code.
-
.It Dv int query_encoding(void *hdl, struct audio_encoding *ae)
is used when
.Dv AUDIO_GETENC
@@ -169,7 +162,6 @@
.Va audio_encoding
structure and return 0 or, if there is no encoding with the
given number, return EINVAL.
-
.It Dv int set_params(void *hdl, int setmode, int usemode,
.Dv "struct audio_params *play, struct audio_params *rec)"
.br
@@ -214,14 +206,12 @@
after the call to
.Va set_params .
Return 0 on success, otherwise an error code.
-
.It Dv int round_blocksize(void *hdl, int bs)
optional, is called with the block size,
.Va bs ,
that has been computed by the upper layer. It should return
a block size, possibly changed according to the needs of the
hardware driver.
-
.It Dv int commit_settings(void *hdl)
optional, is called after all calls to
.Va set_params ,
@@ -231,7 +221,6 @@
and out of command mode for each change can save all the changes
during previous calls and do them all here.
Return 0 on success, otherwise an error code.
-
.It Dv int init_output(void *hdl, void *buffer, int size)
optional, is called before any output starts, but when the total
.Va size
@@ -240,7 +229,6 @@
has been determined. It can be used to initialize looping DMA
for hardware that needs that.
Return 0 on success, otherwise an error code.
-
.It Dv int init_input(void *hdl, void *buffer, int size)
optional, is called before any input starts, but when the total
.Va size
@@ -249,7 +237,6 @@
has been determined. It can be used to initialize looping DMA
for hardware that needs that.
Return 0 on success, otherwise an error code.
-
.It Dv int start_output(void *hdl, void *block, int bsize,
.Dv "void (*intr)(void*), void *intrarg)"
.br
@@ -268,7 +255,6 @@
will normally initiate another call to
.Va start_output .
Return 0 on success, otherwise an error code.
-
.It Dv int start_input(void *hdl, void *block, int bsize,
.Dv "void (*intr)(void*), void *intrarg)"
.br
@@ -287,37 +273,31 @@
will normally initiate another call to
.Va start_input.
Return 0 on success, otherwise an error code.
-
.It Dv int halt_output(void *hdl)
is called to abort the output transfer (started by
.Va start_output )
in progress.
Return 0 on success, otherwise an error code.
-
.It Dv int halt_input(void *hdl)
is called to abort the input transfer (started by
.Va start_input )
in progress.
Return 0 on success, otherwise an error code.
-
.It Dv int speaker_ctl(void *hdl, int on)
optional, is called when a half duplex device changes between
playing and recording. It can, e.g., be used to turn on
and off the speaker.
Return 0 on success, otherwise an error code.
-
.It Dv int getdev(void *hdl, struct audio_device *ret)
Should fill the
.Va audio_device
struct with relevant information about the driver.
Return 0 on success, otherwise an error code.
-
.It Dv int setfd(void *hdl, int fd)
optional, is called when
.Dv AUDIO_SETFD
is used, but only if the device has AUDIO_PROP_FULLDUPLEX set.
Return 0 on success, otherwise an error code.
-
.It Dv int set_port(void *hdl, mixer_ctl_t *mc)
is called in when
.Dv AUDIO_MIXER_WRITE
@@ -325,7 +305,6 @@
.Va mixer_ctl_t
struct at set the corresponding mixer values.
Return 0 on success, otherwise an error code.
-
.It Dv int get_port(void *hdl, mixer_ctl_t *mc)
is called in when
.Dv AUDIO_MIXER_READ
@@ -333,7 +312,6 @@
.Va mixer_ctl_t
struct.
Return 0 on success, otherwise an error code.
-
.It Dv int query_devinfo(void *hdl, mixer_devinfo_t *di)
is called in when
.Dv AUDIO_MIXER_DEVINFO
@@ -341,7 +319,6 @@
.Va mixer_devinfo_t
struct.
Return 0 on success, otherwise an error code.
-
.It Dv "void *alloc(void *hdl, u_long size, int type, int flags)"
.br
optional, is called to allocate the device buffers. If not present
@@ -351,14 +328,12 @@
.Xr malloc 9
is that some buses need special allocation to do DMA.
Returns the address of the buffer, or 0 on failure.
-
.It Dv void free(void *hdl, void *addr, int type)
optional, is called to free memory allocated by
.Va alloc .
If not supplied
.Xr free 9
is used.
-
.It Dv u_long round_buffer(void *hdl, u_long bufsize)
optional, is called at startup to determine the audio
buffer size. The upper layer supplies the suggested
@@ -366,7 +341,6 @@
.Va bufsize ,
which the hardware driver can then change if needed.
E.g., DMA on the ISA bus cannot exceed 65536 bytes.
-
.It Dv "int mappage(void *hdl, void *addr, int offs, int prot)"
.br
optional, is called for
@@ -379,12 +353,11 @@
.Va prot .
Returns -1 on failure, or a machine dependent opaque value
on success.
-
.It Dv int get_props(void *hdl)
Should return the device properties; i.e. a combination of
AUDIO_PROP_xxx.
.El
-
+.Pp
The
.Va query_devinfo
method should define certain mixer controls for
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