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refactor vol_perc to not depend on alsa libraries

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parazyd
2016-12-28 00:41:51 +01:00
parent 1a143566e6
commit c2808b6d99
4 changed files with 18 additions and 33 deletions
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45
slstatus.c
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@ -1,6 +1,5 @@
/* See LICENSE file for copyright and license details. */
#include <alsa/asoundlib.h>
#include <err.h>
#include <fcntl.h>
#include <ifaddrs.h>
@ -18,6 +17,7 @@
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/socket.h>
#include <sys/soundcard.h>
#include <sys/sysinfo.h>
#include <sys/types.h>
#include <sys/utsname.h>
@ -617,41 +617,26 @@ uid(void)
static char *
vol_perc(const char *card)
{
int mute;
long int vol, max, min;
snd_mixer_t *handle;
snd_mixer_elem_t *elem;
snd_mixer_selem_id_t *s_elem;
unsigned int i;
int v, afd, devmask;
char *vnames[] = SOUND_DEVICE_NAMES;
snd_mixer_open(&handle, 0);
snd_mixer_attach(handle, card);
snd_mixer_selem_register(handle, NULL, NULL);
snd_mixer_load(handle);
snd_mixer_selem_id_malloc(&s_elem);
snd_mixer_selem_id_set_name(s_elem, "Master");
elem = snd_mixer_find_selem(handle, s_elem);
if (elem == NULL) {
snd_mixer_selem_id_free(s_elem);
snd_mixer_close(handle);
warn("Failed to get volume percentage for %s", card);
afd = open(card, O_RDONLY);
if (afd < 0) {
warn("Cannot open %s", card);
return smprintf(UNKNOWN_STR);
}
snd_mixer_handle_events(handle);
snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
snd_mixer_selem_get_playback_volume(elem, 0, &vol);
snd_mixer_selem_get_playback_switch(elem, 0, &mute);
ioctl(afd, MIXER_READ(SOUND_MIXER_DEVMASK), &devmask);
for (i = 0; i < (sizeof(vnames) / sizeof((vnames[0]))); i++)
if (devmask & (1 << i))
if (!strcmp("vol", vnames[i]))
ioctl(afd, MIXER_READ(i), &v);
snd_mixer_selem_id_free(s_elem);
snd_mixer_close(handle);
if (!mute)
close(afd);
if (v == 0)
return smprintf("mute");
else if (max == 0)
return smprintf("0%%");
else
return smprintf("%lu%%", ((uint_fast16_t)(vol * 100) / max));
return smprintf("%d%%", v & 0xff);
}
static char *