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	getvol.c (1095B)
	---
	1 /* include this into your dwmstatus.c and use get_vol() as volume.
	2 * if your audio card and subunit numbers differ from 0,0 you might havo
	3 * to use amixer, aplay and the /proc/asound file tree to adapt.
	4 *
	5 * I had compilation issues. As result i had to drop the -std=c99 and
	6 * -pedantic flags from the config.mk
	7 */
	8
	9 #include <alsa/asoundlib.h>
	10 #include <alsa/control.h>
	11
	12 int
	13 get_vol(void)
	14 {
	15 int vol;
	16 snd_hctl_t *hctl;
	17 snd_ctl_elem_id_t *id;
	18 snd_ctl_elem_value_t *control;
	19
	20 // To find card and subdevice: /proc/asound/, aplay -L, amixer controls
	21 snd_hctl_open(&hctl, "hw:0", 0);
	22 snd_hctl_load(hctl);
	23
	24 snd_ctl_elem_id_alloca(&id);
	25 snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
	26
	27 // amixer controls
	28 snd_ctl_elem_id_set_name(id, "Master Playback Volume");
	29
	30 snd_hctl_elem_t *elem = snd_hctl_find_elem(hctl, id);
	31
	32 snd_ctl_elem_value_alloca(&control);
	33 snd_ctl_elem_value_set_id(control, id);
	34
	35 snd_hctl_elem_read(elem, control);
	36 vol = (int)snd_ctl_elem_value_get_integer(control,0);
	37
	38 snd_hctl_close(hctl);
	39 return vol;
	40 }