freebsd-dev/sys/dev/sound/pcm/mixer.h
John Baldwin 4fb369f815 - Move all of the hwvol functions into a mixer_hwvol_* namespace, and make
all of the hwvol members of struct snd_mixer live in a hwvol_* namespace.
- When changing the mixer device via the hwvol_mixer sysctl, reset the
  muted state so that a mute operation on a new device won't try to
  unmute the new device with the old device's saved volume.
- When the volume is muted, if a down or up volume request is received,
  first restore the saved volume level and then adjust it.

Reviewed by:	cg
2001-01-11 23:26:16 +00:00

49 lines
2.2 KiB
C

/*
* Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
extern int mixer_init(device_t dev, kobj_class_t cls, void *devinfo);
extern int mixer_uninit(device_t dev);
extern int mixer_reinit(device_t dev);
extern int mixer_ioctl(snddev_info *d, u_long cmd, caddr_t arg);
extern int mixer_busy(snd_mixer *m, int busy);
extern int mixer_isbusy(snd_mixer *m);
int mixer_hwvol_init(device_t dev);
void mixer_hwvol_mute(device_t dev);
void mixer_hwvol_step(device_t dev, int left_step, int right_step);
extern void change_bits(mixer_tab *t, u_char *regval, int dev, int chn, int newval);
void mix_setdevs(snd_mixer *m, u_int32_t v);
void mix_setrecdevs(snd_mixer *m, u_int32_t v);
u_int32_t mix_getdevs(snd_mixer *m);
u_int32_t mix_getrecdevs(snd_mixer *m);
void *mix_getdevinfo(snd_mixer *m);
#define MIXER_DECLARE(name) DEFINE_CLASS(name, name ## _methods, sizeof(snd_mixer))