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/*
* 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.
*
* $FreeBSD$
*/
#include <dev/pcm/sound.h>
static u_int16_t snd_mixerdefaults[SOUND_MIXER_NRDEVICES] = {
[SOUND_MIXER_VOLUME] = 75,
[SOUND_MIXER_BASS] = 50,
[SOUND_MIXER_TREBLE] = 50,
[SOUND_MIXER_PCM] = 75,
[SOUND_MIXER_SPEAKER] = 75,
[SOUND_MIXER_LINE] = 75,
[SOUND_MIXER_MIC] = 0,
[SOUND_MIXER_CD] = 75,
[SOUND_MIXER_LINE1] = 75,
[SOUND_MIXER_VIDEO] = 75,
[SOUND_MIXER_RECLEV] = 0,
};
int
mixer_init(snddev_info *d, snd_mixer *m, void *devinfo)
{
if (d == NULL) return -1;
d->mixer = *m;
d->mixer.devinfo = devinfo;
bzero(&d->mixer.level, sizeof d->mixer.level);
if (d->mixer.init != NULL && d->mixer.init(&d->mixer) == 0) {
int i;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
u_int16_t v = snd_mixerdefaults[i];
mixer_set(d, i, v | (v << 8));
}
mixer_setrecsrc(d, SOUND_MASK_MIC);
return 0;
} else return -1;
}
int
mixer_set(snddev_info *d, unsigned dev, unsigned lev)
{
if (d == NULL || d->mixer.set == NULL) return -1;
if ((dev < SOUND_MIXER_NRDEVICES) && (d->mixer.devs & (1 << dev))) {
unsigned l = min((lev & 0x00ff), 100);
unsigned r = min(((lev & 0xff00) >> 8), 100);
int v = d->mixer.set(&d->mixer, dev, l, r);
if (v >= 0) d->mixer.level[dev] = v;
return 0;
} else return -1;
}
int
mixer_get(snddev_info *d, int dev)
{
if (d == NULL) return -1;
if (dev < SOUND_MIXER_NRDEVICES && (d->mixer.devs & (1 << dev)))
return d->mixer.level[dev];
else return -1;
}
int
mixer_setrecsrc(snddev_info *d, u_int32_t src)
{
if (d == NULL || d->mixer.setrecsrc == NULL) return -1;
src &= d->mixer.recdevs;
if (src == 0) src = SOUND_MASK_MIC;
d->mixer.recsrc = d->mixer.setrecsrc(&d->mixer, src);
return 0;
}
int
mixer_getrecsrc(snddev_info *d)
{
if (d == NULL) return -1;
return d->mixer.recsrc;
}
int
mixer_ioctl(snddev_info *d, u_long cmd, caddr_t arg)
{
int ret, *arg_i = (int *)arg;
if ((cmd & MIXER_WRITE(0)) == MIXER_WRITE(0)) {
int j = cmd & 0xff;
if (j == SOUND_MIXER_RECSRC) ret = mixer_setrecsrc(d, *arg_i);
else ret = mixer_set(d, j, *arg_i);
return (ret == 0)? 0 : ENXIO;
}
if ((cmd & MIXER_READ(0)) == MIXER_READ(0)) {
int v = -1, j = cmd & 0xff;
switch (j) {
case SOUND_MIXER_DEVMASK:
case SOUND_MIXER_CAPS:
case SOUND_MIXER_STEREODEVS:
v = d->mixer.devs;
break;
case SOUND_MIXER_RECMASK:
v = d->mixer.recdevs;
break;
case SOUND_MIXER_RECSRC:
v = mixer_getrecsrc(d);
break;
default:
v = mixer_get(d, j);
}
*arg_i = v;
return (v != -1)? 0 : ENXIO;
}
return ENXIO;
}
void
mix_setdevs(snd_mixer *m, u_int32_t v)
{
m->devs = v;
}
void
mix_setrecdevs(snd_mixer *m, u_int32_t v)
{
m->recdevs = v;
}
u_int32_t
mix_getdevs(snd_mixer *m)
{
return m->devs;
}
u_int32_t
mix_getrecdevs(snd_mixer *m)
{
return m->recdevs;
}
void *
mix_getdevinfo(snd_mixer *m)
{
return m->devinfo;
}
/*
* The various mixers use a variety of bitmasks etc. The Voxware
* driver had a very nice technique to describe a mixer and interface
* to it. A table defines, for each channel, which register, bits,
* offset, polarity to use. This procedure creates the new value
* using the table and the old value.
*/
void
change_bits(mixer_tab *t, u_char *regval, int dev, int chn, int newval)
{
u_char mask;
int shift;
DEB(printf("ch_bits dev %d ch %d val %d old 0x%02x "
"r %d p %d bit %d off %d\n",
dev, chn, newval, *regval,
(*t)[dev][chn].regno, (*t)[dev][chn].polarity,
(*t)[dev][chn].nbits, (*t)[dev][chn].bitoffs ) );
if ( (*t)[dev][chn].polarity == 1) /* reverse */
newval = 100 - newval ;
mask = (1 << (*t)[dev][chn].nbits) - 1;
newval = (int) ((newval * mask) + 50) / 100; /* Scale it */
shift = (*t)[dev][chn].bitoffs /*- (*t)[dev][LEFT_CHN].nbits + 1*/;
*regval &= ~(mask << shift); /* Filter out the previous value */
*regval |= (newval & mask) << shift; /* Set the new value */
}
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